xref: /openbmc/linux/drivers/gpu/drm/amd/display/dc/core/dc_resource.c (revision 0d4b4253)

/*
 * Copyright 2012-15 Advanced Micro Devices, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 * Authors: AMD
 *
 */

#include <linux/slab.h>

#include "dm_services.h"

#include "resource.h"
#include "include/irq_service_interface.h"
#include "link_encoder.h"
#include "stream_encoder.h"
#include "opp.h"
#include "timing_generator.h"
#include "transform.h"
#include "dccg.h"
#include "dchubbub.h"
#include "dpp.h"
#include "core_types.h"
#include "set_mode_types.h"
#include "virtual/virtual_stream_encoder.h"
#include "dpcd_defs.h"
#include "link_enc_cfg.h"
#include "dc_link_dp.h"

#if defined(CONFIG_DRM_AMD_DC_SI)
#include "dce60/dce60_resource.h"
#endif
#include "dce80/dce80_resource.h"
#include "dce100/dce100_resource.h"
#include "dce110/dce110_resource.h"
#include "dce112/dce112_resource.h"
#include "dce120/dce120_resource.h"
#if defined(CONFIG_DRM_AMD_DC_DCN)
#include "dcn10/dcn10_resource.h"
#include "dcn20/dcn20_resource.h"
#include "dcn21/dcn21_resource.h"
#include "dcn30/dcn30_resource.h"
#include "dcn301/dcn301_resource.h"
#include "dcn302/dcn302_resource.h"
#include "dcn303/dcn303_resource.h"
#include "dcn31/dcn31_resource.h"
#endif

#define DC_LOGGER_INIT(logger)

enum dce_version resource_parse_asic_id(struct hw_asic_id asic_id)
{
	enum dce_version dc_version = DCE_VERSION_UNKNOWN;
	switch (asic_id.chip_family) {

#if defined(CONFIG_DRM_AMD_DC_SI)
	case FAMILY_SI:
		if (ASIC_REV_IS_TAHITI_P(asic_id.hw_internal_rev) ||
		    ASIC_REV_IS_PITCAIRN_PM(asic_id.hw_internal_rev) ||
		    ASIC_REV_IS_CAPEVERDE_M(asic_id.hw_internal_rev))
			dc_version = DCE_VERSION_6_0;
		else if (ASIC_REV_IS_OLAND_M(asic_id.hw_internal_rev))
			dc_version = DCE_VERSION_6_4;
		else
			dc_version = DCE_VERSION_6_1;
		break;
#endif
	case FAMILY_CI:
		dc_version = DCE_VERSION_8_0;
		break;
	case FAMILY_KV:
		if (ASIC_REV_IS_KALINDI(asic_id.hw_internal_rev) ||
		    ASIC_REV_IS_BHAVANI(asic_id.hw_internal_rev) ||
		    ASIC_REV_IS_GODAVARI(asic_id.hw_internal_rev))
			dc_version = DCE_VERSION_8_3;
		else
			dc_version = DCE_VERSION_8_1;
		break;
	case FAMILY_CZ:
		dc_version = DCE_VERSION_11_0;
		break;

	case FAMILY_VI:
		if (ASIC_REV_IS_TONGA_P(asic_id.hw_internal_rev) ||
				ASIC_REV_IS_FIJI_P(asic_id.hw_internal_rev)) {
			dc_version = DCE_VERSION_10_0;
			break;
		}
		if (ASIC_REV_IS_POLARIS10_P(asic_id.hw_internal_rev) ||
				ASIC_REV_IS_POLARIS11_M(asic_id.hw_internal_rev) ||
				ASIC_REV_IS_POLARIS12_V(asic_id.hw_internal_rev)) {
			dc_version = DCE_VERSION_11_2;
		}
		if (ASIC_REV_IS_VEGAM(asic_id.hw_internal_rev))
			dc_version = DCE_VERSION_11_22;
		break;
	case FAMILY_AI:
		if (ASICREV_IS_VEGA20_P(asic_id.hw_internal_rev))
			dc_version = DCE_VERSION_12_1;
		else
			dc_version = DCE_VERSION_12_0;
		break;
#if defined(CONFIG_DRM_AMD_DC_DCN)
	case FAMILY_RV:
		dc_version = DCN_VERSION_1_0;
		if (ASICREV_IS_RAVEN2(asic_id.hw_internal_rev))
			dc_version = DCN_VERSION_1_01;
		if (ASICREV_IS_RENOIR(asic_id.hw_internal_rev))
			dc_version = DCN_VERSION_2_1;
		if (ASICREV_IS_GREEN_SARDINE(asic_id.hw_internal_rev))
			dc_version = DCN_VERSION_2_1;
		break;

	case FAMILY_NV:
		dc_version = DCN_VERSION_2_0;
		if (ASICREV_IS_SIENNA_CICHLID_P(asic_id.hw_internal_rev))
			dc_version = DCN_VERSION_3_0;
		if (ASICREV_IS_DIMGREY_CAVEFISH_P(asic_id.hw_internal_rev))
			dc_version = DCN_VERSION_3_02;
		if (ASICREV_IS_BEIGE_GOBY_P(asic_id.hw_internal_rev))
			dc_version = DCN_VERSION_3_03;
		break;

	case FAMILY_VGH:
		dc_version = DCN_VERSION_3_01;
		break;

	case FAMILY_YELLOW_CARP:
		if (ASICREV_IS_YELLOW_CARP(asic_id.hw_internal_rev))
			dc_version = DCN_VERSION_3_1;
		break;
#endif

	default:
		dc_version = DCE_VERSION_UNKNOWN;
		break;
	}
	return dc_version;
}

struct resource_pool *dc_create_resource_pool(struct dc  *dc,
					      const struct dc_init_data *init_data,
					      enum dce_version dc_version)
{
	struct resource_pool *res_pool = NULL;

	switch (dc_version) {
#if defined(CONFIG_DRM_AMD_DC_SI)
	case DCE_VERSION_6_0:
		res_pool = dce60_create_resource_pool(
			init_data->num_virtual_links, dc);
		break;
	case DCE_VERSION_6_1:
		res_pool = dce61_create_resource_pool(
			init_data->num_virtual_links, dc);
		break;
	case DCE_VERSION_6_4:
		res_pool = dce64_create_resource_pool(
			init_data->num_virtual_links, dc);
		break;
#endif
	case DCE_VERSION_8_0:
		res_pool = dce80_create_resource_pool(
				init_data->num_virtual_links, dc);
		break;
	case DCE_VERSION_8_1:
		res_pool = dce81_create_resource_pool(
				init_data->num_virtual_links, dc);
		break;
	case DCE_VERSION_8_3:
		res_pool = dce83_create_resource_pool(
				init_data->num_virtual_links, dc);
		break;
	case DCE_VERSION_10_0:
		res_pool = dce100_create_resource_pool(
				init_data->num_virtual_links, dc);
		break;
	case DCE_VERSION_11_0:
		res_pool = dce110_create_resource_pool(
				init_data->num_virtual_links, dc,
				init_data->asic_id);
		break;
	case DCE_VERSION_11_2:
	case DCE_VERSION_11_22:
		res_pool = dce112_create_resource_pool(
				init_data->num_virtual_links, dc);
		break;
	case DCE_VERSION_12_0:
	case DCE_VERSION_12_1:
		res_pool = dce120_create_resource_pool(
				init_data->num_virtual_links, dc);
		break;

#if defined(CONFIG_DRM_AMD_DC_DCN)
	case DCN_VERSION_1_0:
	case DCN_VERSION_1_01:
		res_pool = dcn10_create_resource_pool(init_data, dc);
		break;
	case DCN_VERSION_2_0:
		res_pool = dcn20_create_resource_pool(init_data, dc);
		break;
	case DCN_VERSION_2_1:
		res_pool = dcn21_create_resource_pool(init_data, dc);
		break;
	case DCN_VERSION_3_0:
		res_pool = dcn30_create_resource_pool(init_data, dc);
		break;
	case DCN_VERSION_3_01:
		res_pool = dcn301_create_resource_pool(init_data, dc);
		break;
	case DCN_VERSION_3_02:
		res_pool = dcn302_create_resource_pool(init_data, dc);
		break;
	case DCN_VERSION_3_03:
		res_pool = dcn303_create_resource_pool(init_data, dc);
		break;
	case DCN_VERSION_3_1:
		res_pool = dcn31_create_resource_pool(init_data, dc);
		break;
#endif
	default:
		break;
	}

	if (res_pool != NULL) {
		if (dc->ctx->dc_bios->fw_info_valid) {
			res_pool->ref_clocks.xtalin_clock_inKhz =
				dc->ctx->dc_bios->fw_info.pll_info.crystal_frequency;
			/* initialize with firmware data first, no all
			 * ASIC have DCCG SW component. FPGA or
			 * simulation need initialization of
			 * dccg_ref_clock_inKhz, dchub_ref_clock_inKhz
			 * with xtalin_clock_inKhz
			 */
			res_pool->ref_clocks.dccg_ref_clock_inKhz =
				res_pool->ref_clocks.xtalin_clock_inKhz;
			res_pool->ref_clocks.dchub_ref_clock_inKhz =
				res_pool->ref_clocks.xtalin_clock_inKhz;
		} else
			ASSERT_CRITICAL(false);
	}

	return res_pool;
}

void dc_destroy_resource_pool(struct dc  *dc)
{
	if (dc) {
		if (dc->res_pool)
			dc->res_pool->funcs->destroy(&dc->res_pool);

		kfree(dc->hwseq);
	}
}

static void update_num_audio(
	const struct resource_straps *straps,
	unsigned int *num_audio,
	struct audio_support *aud_support)
{
	aud_support->dp_audio = true;
	aud_support->hdmi_audio_native = false;
	aud_support->hdmi_audio_on_dongle = false;

	if (straps->hdmi_disable == 0) {
		if (straps->dc_pinstraps_audio & 0x2) {
			aud_support->hdmi_audio_on_dongle = true;
			aud_support->hdmi_audio_native = true;
		}
	}

	switch (straps->audio_stream_number) {
	case 0: /* multi streams supported */
		break;
	case 1: /* multi streams not supported */
		*num_audio = 1;
		break;
	default:
		DC_ERR("DC: unexpected audio fuse!\n");
	}
}

bool resource_construct(
	unsigned int num_virtual_links,
	struct dc  *dc,
	struct resource_pool *pool,
	const struct resource_create_funcs *create_funcs)
{
	struct dc_context *ctx = dc->ctx;
	const struct resource_caps *caps = pool->res_cap;
	int i;
	unsigned int num_audio = caps->num_audio;
	struct resource_straps straps = {0};

	if (create_funcs->read_dce_straps)
		create_funcs->read_dce_straps(dc->ctx, &straps);

	pool->audio_count = 0;
	if (create_funcs->create_audio) {
		/* find the total number of streams available via the
		 * AZALIA_F0_CODEC_PIN_CONTROL_RESPONSE_CONFIGURATION_DEFAULT
		 * registers (one for each pin) starting from pin 1
		 * up to the max number of audio pins.
		 * We stop on the first pin where
		 * PORT_CONNECTIVITY == 1 (as instructed by HW team).
		 */
		update_num_audio(&straps, &num_audio, &pool->audio_support);
		for (i = 0; i < caps->num_audio; i++) {
			struct audio *aud = create_funcs->create_audio(ctx, i);

			if (aud == NULL) {
				DC_ERR("DC: failed to create audio!\n");
				return false;
			}
			if (!aud->funcs->endpoint_valid(aud)) {
				aud->funcs->destroy(&aud);
				break;
			}
			pool->audios[i] = aud;
			pool->audio_count++;
		}
	}

	pool->stream_enc_count = 0;
	if (create_funcs->create_stream_encoder) {
		for (i = 0; i < caps->num_stream_encoder; i++) {
			pool->stream_enc[i] = create_funcs->create_stream_encoder(i, ctx);
			if (pool->stream_enc[i] == NULL)
				DC_ERR("DC: failed to create stream_encoder!\n");
			pool->stream_enc_count++;
		}
	}

#if defined(CONFIG_DRM_AMD_DC_DCN)
	pool->hpo_dp_stream_enc_count = 0;
	if (create_funcs->create_hpo_dp_stream_encoder) {
		for (i = 0; i < caps->num_hpo_dp_stream_encoder; i++) {
			pool->hpo_dp_stream_enc[i] = create_funcs->create_hpo_dp_stream_encoder(i+ENGINE_ID_HPO_DP_0, ctx);
			if (pool->hpo_dp_stream_enc[i] == NULL)
				DC_ERR("DC: failed to create HPO DP stream encoder!\n");
			pool->hpo_dp_stream_enc_count++;

		}
	}

	pool->hpo_dp_link_enc_count = 0;
	if (create_funcs->create_hpo_dp_link_encoder) {
		for (i = 0; i < caps->num_hpo_dp_link_encoder; i++) {
			pool->hpo_dp_link_enc[i] = create_funcs->create_hpo_dp_link_encoder(i, ctx);
			if (pool->hpo_dp_link_enc[i] == NULL)
				DC_ERR("DC: failed to create HPO DP link encoder!\n");
			pool->hpo_dp_link_enc_count++;
		}
	}
#endif

#if defined(CONFIG_DRM_AMD_DC_DCN)
	for (i = 0; i < caps->num_mpc_3dlut; i++) {
		pool->mpc_lut[i] = dc_create_3dlut_func();
		if (pool->mpc_lut[i] == NULL)
			DC_ERR("DC: failed to create MPC 3dlut!\n");
		pool->mpc_shaper[i] = dc_create_transfer_func();
		if (pool->mpc_shaper[i] == NULL)
			DC_ERR("DC: failed to create MPC shaper!\n");
	}
#endif
	dc->caps.dynamic_audio = false;
	if (pool->audio_count < pool->stream_enc_count) {
		dc->caps.dynamic_audio = true;
	}
	for (i = 0; i < num_virtual_links; i++) {
		pool->stream_enc[pool->stream_enc_count] =
			virtual_stream_encoder_create(
					ctx, ctx->dc_bios);
		if (pool->stream_enc[pool->stream_enc_count] == NULL) {
			DC_ERR("DC: failed to create stream_encoder!\n");
			return false;
		}
		pool->stream_enc_count++;
	}

	dc->hwseq = create_funcs->create_hwseq(ctx);

	return true;
}
static int find_matching_clock_source(
		const struct resource_pool *pool,
		struct clock_source *clock_source)
{

	int i;

	for (i = 0; i < pool->clk_src_count; i++) {
		if (pool->clock_sources[i] == clock_source)
			return i;
	}
	return -1;
}

void resource_unreference_clock_source(
		struct resource_context *res_ctx,
		const struct resource_pool *pool,
		struct clock_source *clock_source)
{
	int i = find_matching_clock_source(pool, clock_source);

	if (i > -1)
		res_ctx->clock_source_ref_count[i]--;

	if (pool->dp_clock_source == clock_source)
		res_ctx->dp_clock_source_ref_count--;
}

void resource_reference_clock_source(
		struct resource_context *res_ctx,
		const struct resource_pool *pool,
		struct clock_source *clock_source)
{
	int i = find_matching_clock_source(pool, clock_source);

	if (i > -1)
		res_ctx->clock_source_ref_count[i]++;

	if (pool->dp_clock_source == clock_source)
		res_ctx->dp_clock_source_ref_count++;
}

int resource_get_clock_source_reference(
		struct resource_context *res_ctx,
		const struct resource_pool *pool,
		struct clock_source *clock_source)
{
	int i = find_matching_clock_source(pool, clock_source);

	if (i > -1)
		return res_ctx->clock_source_ref_count[i];

	if (pool->dp_clock_source == clock_source)
		return res_ctx->dp_clock_source_ref_count;

	return -1;
}

bool resource_are_vblanks_synchronizable(
	struct dc_stream_state *stream1,
	struct dc_stream_state *stream2)
{
	uint32_t base60_refresh_rates[] = {10, 20, 5};
	uint8_t i;
	uint8_t rr_count = ARRAY_SIZE(base60_refresh_rates);
	uint64_t frame_time_diff;

	if (stream1->ctx->dc->config.vblank_alignment_dto_params &&
		stream1->ctx->dc->config.vblank_alignment_max_frame_time_diff > 0 &&
		dc_is_dp_signal(stream1->signal) &&
		dc_is_dp_signal(stream2->signal) &&
		false == stream1->has_non_synchronizable_pclk &&
		false == stream2->has_non_synchronizable_pclk &&
		stream1->timing.flags.VBLANK_SYNCHRONIZABLE &&
		stream2->timing.flags.VBLANK_SYNCHRONIZABLE) {
		/* disable refresh rates higher than 60Hz for now */
		if (stream1->timing.pix_clk_100hz*100/stream1->timing.h_total/
				stream1->timing.v_total > 60)
			return false;
		if (stream2->timing.pix_clk_100hz*100/stream2->timing.h_total/
				stream2->timing.v_total > 60)
			return false;
		frame_time_diff = (uint64_t)10000 *
			stream1->timing.h_total *
			stream1->timing.v_total *
			stream2->timing.pix_clk_100hz;
		frame_time_diff = div_u64(frame_time_diff, stream1->timing.pix_clk_100hz);
		frame_time_diff = div_u64(frame_time_diff, stream2->timing.h_total);
		frame_time_diff = div_u64(frame_time_diff, stream2->timing.v_total);
		for (i = 0; i < rr_count; i++) {
			int64_t diff = (int64_t)div_u64(frame_time_diff * base60_refresh_rates[i], 10) - 10000;

			if (diff < 0)
				diff = -diff;
			if (diff < stream1->ctx->dc->config.vblank_alignment_max_frame_time_diff)
				return true;
		}
	}
	return false;
}

bool resource_are_streams_timing_synchronizable(
	struct dc_stream_state *stream1,
	struct dc_stream_state *stream2)
{
	if (stream1->timing.h_total != stream2->timing.h_total)
		return false;

	if (stream1->timing.v_total != stream2->timing.v_total)
		return false;

	if (stream1->timing.h_addressable
				!= stream2->timing.h_addressable)
		return false;

	if (stream1->timing.v_addressable
				!= stream2->timing.v_addressable)
		return false;

	if (stream1->timing.v_front_porch
				!= stream2->timing.v_front_porch)
		return false;

	if (stream1->timing.pix_clk_100hz
				!= stream2->timing.pix_clk_100hz)
		return false;

	if (stream1->clamping.c_depth != stream2->clamping.c_depth)
		return false;

	if (stream1->phy_pix_clk != stream2->phy_pix_clk
			&& (!dc_is_dp_signal(stream1->signal)
			|| !dc_is_dp_signal(stream2->signal)))
		return false;

	if (stream1->view_format != stream2->view_format)
		return false;

	if (stream1->ignore_msa_timing_param || stream2->ignore_msa_timing_param)
		return false;

	return true;
}
static bool is_dp_and_hdmi_sharable(
		struct dc_stream_state *stream1,
		struct dc_stream_state *stream2)
{
	if (stream1->ctx->dc->caps.disable_dp_clk_share)
		return false;

	if (stream1->clamping.c_depth != COLOR_DEPTH_888 ||
		stream2->clamping.c_depth != COLOR_DEPTH_888)
		return false;

	return true;

}

static bool is_sharable_clk_src(
	const struct pipe_ctx *pipe_with_clk_src,
	const struct pipe_ctx *pipe)
{
	if (pipe_with_clk_src->clock_source == NULL)
		return false;

	if (pipe_with_clk_src->stream->signal == SIGNAL_TYPE_VIRTUAL)
		return false;

	if (dc_is_dp_signal(pipe_with_clk_src->stream->signal) ||
		(dc_is_dp_signal(pipe->stream->signal) &&
		!is_dp_and_hdmi_sharable(pipe_with_clk_src->stream,
				     pipe->stream)))
		return false;

	if (dc_is_hdmi_signal(pipe_with_clk_src->stream->signal)
			&& dc_is_dual_link_signal(pipe->stream->signal))
		return false;

	if (dc_is_hdmi_signal(pipe->stream->signal)
			&& dc_is_dual_link_signal(pipe_with_clk_src->stream->signal))
		return false;

	if (!resource_are_streams_timing_synchronizable(
			pipe_with_clk_src->stream, pipe->stream))
		return false;

	return true;
}

struct clock_source *resource_find_used_clk_src_for_sharing(
					struct resource_context *res_ctx,
					struct pipe_ctx *pipe_ctx)
{
	int i;

	for (i = 0; i < MAX_PIPES; i++) {
		if (is_sharable_clk_src(&res_ctx->pipe_ctx[i], pipe_ctx))
			return res_ctx->pipe_ctx[i].clock_source;
	}

	return NULL;
}

static enum pixel_format convert_pixel_format_to_dalsurface(
		enum surface_pixel_format surface_pixel_format)
{
	enum pixel_format dal_pixel_format = PIXEL_FORMAT_UNKNOWN;

	switch (surface_pixel_format) {
	case SURFACE_PIXEL_FORMAT_GRPH_PALETA_256_COLORS:
		dal_pixel_format = PIXEL_FORMAT_INDEX8;
		break;
	case SURFACE_PIXEL_FORMAT_GRPH_ARGB1555:
		dal_pixel_format = PIXEL_FORMAT_RGB565;
		break;
	case SURFACE_PIXEL_FORMAT_GRPH_RGB565:
		dal_pixel_format = PIXEL_FORMAT_RGB565;
		break;
	case SURFACE_PIXEL_FORMAT_GRPH_ARGB8888:
		dal_pixel_format = PIXEL_FORMAT_ARGB8888;
		break;
	case SURFACE_PIXEL_FORMAT_GRPH_ABGR8888:
		dal_pixel_format = PIXEL_FORMAT_ARGB8888;
		break;
	case SURFACE_PIXEL_FORMAT_GRPH_ARGB2101010:
		dal_pixel_format = PIXEL_FORMAT_ARGB2101010;
		break;
	case SURFACE_PIXEL_FORMAT_GRPH_ABGR2101010:
		dal_pixel_format = PIXEL_FORMAT_ARGB2101010;
		break;
	case SURFACE_PIXEL_FORMAT_GRPH_ABGR2101010_XR_BIAS:
		dal_pixel_format = PIXEL_FORMAT_ARGB2101010_XRBIAS;
		break;
	case SURFACE_PIXEL_FORMAT_GRPH_ABGR16161616F:
	case SURFACE_PIXEL_FORMAT_GRPH_ARGB16161616F:
		dal_pixel_format = PIXEL_FORMAT_FP16;
		break;
	case SURFACE_PIXEL_FORMAT_VIDEO_420_YCbCr:
	case SURFACE_PIXEL_FORMAT_VIDEO_420_YCrCb:
		dal_pixel_format = PIXEL_FORMAT_420BPP8;
		break;
	case SURFACE_PIXEL_FORMAT_VIDEO_420_10bpc_YCbCr:
	case SURFACE_PIXEL_FORMAT_VIDEO_420_10bpc_YCrCb:
		dal_pixel_format = PIXEL_FORMAT_420BPP10;
		break;
	case SURFACE_PIXEL_FORMAT_GRPH_ARGB16161616:
	case SURFACE_PIXEL_FORMAT_GRPH_ABGR16161616:
	default:
		dal_pixel_format = PIXEL_FORMAT_UNKNOWN;
		break;
	}
	return dal_pixel_format;
}

static inline void get_vp_scan_direction(
	enum dc_rotation_angle rotation,
	bool horizontal_mirror,
	bool *orthogonal_rotation,
	bool *flip_vert_scan_dir,
	bool *flip_horz_scan_dir)
{
	*orthogonal_rotation = false;
	*flip_vert_scan_dir = false;
	*flip_horz_scan_dir = false;
	if (rotation == ROTATION_ANGLE_180) {
		*flip_vert_scan_dir = true;
		*flip_horz_scan_dir = true;
	} else if (rotation == ROTATION_ANGLE_90) {
		*orthogonal_rotation = true;
		*flip_horz_scan_dir = true;
	} else if (rotation == ROTATION_ANGLE_270) {
		*orthogonal_rotation = true;
		*flip_vert_scan_dir = true;
	}

	if (horizontal_mirror)
		*flip_horz_scan_dir = !*flip_horz_scan_dir;
}

int get_num_mpc_splits(struct pipe_ctx *pipe)
{
	int mpc_split_count = 0;
	struct pipe_ctx *other_pipe = pipe->bottom_pipe;

	while (other_pipe && other_pipe->plane_state == pipe->plane_state) {
		mpc_split_count++;
		other_pipe = other_pipe->bottom_pipe;
	}
	other_pipe = pipe->top_pipe;
	while (other_pipe && other_pipe->plane_state == pipe->plane_state) {
		mpc_split_count++;
		other_pipe = other_pipe->top_pipe;
	}

	return mpc_split_count;
}

int get_num_odm_splits(struct pipe_ctx *pipe)
{
	int odm_split_count = 0;
	struct pipe_ctx *next_pipe = pipe->next_odm_pipe;
	while (next_pipe) {
		odm_split_count++;
		next_pipe = next_pipe->next_odm_pipe;
	}
	pipe = pipe->prev_odm_pipe;
	while (pipe) {
		odm_split_count++;
		pipe = pipe->prev_odm_pipe;
	}
	return odm_split_count;
}

static void calculate_split_count_and_index(struct pipe_ctx *pipe_ctx, int *split_count, int *split_idx)
{
	*split_count = get_num_odm_splits(pipe_ctx);
	*split_idx = 0;
	if (*split_count == 0) {
		/*Check for mpc split*/
		struct pipe_ctx *split_pipe = pipe_ctx->top_pipe;

		*split_count = get_num_mpc_splits(pipe_ctx);
		while (split_pipe && split_pipe->plane_state == pipe_ctx->plane_state) {
			(*split_idx)++;
			split_pipe = split_pipe->top_pipe;
		}
	} else {
		/*Get odm split index*/
		struct pipe_ctx *split_pipe = pipe_ctx->prev_odm_pipe;

		while (split_pipe) {
			(*split_idx)++;
			split_pipe = split_pipe->prev_odm_pipe;
		}
	}
}

/*
 * This is a preliminary vp size calculation to allow us to check taps support.
 * The result is completely overridden afterwards.
 */
static void calculate_viewport_size(struct pipe_ctx *pipe_ctx)
{
	struct scaler_data *data = &pipe_ctx->plane_res.scl_data;

	data->viewport.width = dc_fixpt_ceil(dc_fixpt_mul_int(data->ratios.horz, data->recout.width));
	data->viewport.height = dc_fixpt_ceil(dc_fixpt_mul_int(data->ratios.vert, data->recout.height));
	data->viewport_c.width = dc_fixpt_ceil(dc_fixpt_mul_int(data->ratios.horz_c, data->recout.width));
	data->viewport_c.height = dc_fixpt_ceil(dc_fixpt_mul_int(data->ratios.vert_c, data->recout.height));
	if (pipe_ctx->plane_state->rotation == ROTATION_ANGLE_90 ||
			pipe_ctx->plane_state->rotation == ROTATION_ANGLE_270) {
		swap(data->viewport.width, data->viewport.height);
		swap(data->viewport_c.width, data->viewport_c.height);
	}
}

static void calculate_recout(struct pipe_ctx *pipe_ctx)
{
	const struct dc_plane_state *plane_state = pipe_ctx->plane_state;
	const struct dc_stream_state *stream = pipe_ctx->stream;
	struct scaler_data *data = &pipe_ctx->plane_res.scl_data;
	struct rect surf_clip = plane_state->clip_rect;
	bool split_tb = stream->view_format == VIEW_3D_FORMAT_TOP_AND_BOTTOM;
	int split_count, split_idx;

	calculate_split_count_and_index(pipe_ctx, &split_count, &split_idx);
	if (stream->view_format == VIEW_3D_FORMAT_SIDE_BY_SIDE)
		split_idx = 0;

	/*
	 * Only the leftmost ODM pipe should be offset by a nonzero distance
	 */
	if (!pipe_ctx->prev_odm_pipe || split_idx == split_count) {
		data->recout.x = stream->dst.x;
		if (stream->src.x < surf_clip.x)
			data->recout.x += (surf_clip.x - stream->src.x) * stream->dst.width
						/ stream->src.width;
	} else
		data->recout.x = 0;

	if (stream->src.x > surf_clip.x)
		surf_clip.width -= stream->src.x - surf_clip.x;
	data->recout.width = surf_clip.width * stream->dst.width / stream->src.width;
	if (data->recout.width + data->recout.x > stream->dst.x + stream->dst.width)
		data->recout.width = stream->dst.x + stream->dst.width - data->recout.x;

	data->recout.y = stream->dst.y;
	if (stream->src.y < surf_clip.y)
		data->recout.y += (surf_clip.y - stream->src.y) * stream->dst.height
						/ stream->src.height;
	else if (stream->src.y > surf_clip.y)
		surf_clip.height -= stream->src.y - surf_clip.y;

	data->recout.height = surf_clip.height * stream->dst.height / stream->src.height;
	if (data->recout.height + data->recout.y > stream->dst.y + stream->dst.height)
		data->recout.height = stream->dst.y + stream->dst.height - data->recout.y;

	/* Handle h & v split */
	if (split_tb) {
		ASSERT(data->recout.height % 2 == 0);
		data->recout.height /= 2;
	} else if (split_count) {
		if (!pipe_ctx->next_odm_pipe && !pipe_ctx->prev_odm_pipe) {
			/* extra pixels in the division remainder need to go to pipes after
			 * the extra pixel index minus one(epimo) defined here as:
			 */
			int epimo = split_count - data->recout.width % (split_count + 1);

			data->recout.x += (data->recout.width / (split_count + 1)) * split_idx;
			if (split_idx > epimo)
				data->recout.x += split_idx - epimo - 1;
			ASSERT(stream->view_format != VIEW_3D_FORMAT_SIDE_BY_SIDE || data->recout.width % 2 == 0);
			data->recout.width = data->recout.width / (split_count + 1) + (split_idx > epimo ? 1 : 0);
		} else {
			/* odm */
			if (split_idx == split_count) {
				/* rightmost pipe is the remainder recout */
				data->recout.width -= data->h_active * split_count - data->recout.x;

				/* ODM combine cases with MPO we can get negative widths */
				if (data->recout.width < 0)
					data->recout.width = 0;

				data->recout.x = 0;
			} else
				data->recout.width = data->h_active - data->recout.x;
		}
	}
}

static void calculate_scaling_ratios(struct pipe_ctx *pipe_ctx)
{
	const struct dc_plane_state *plane_state = pipe_ctx->plane_state;
	const struct dc_stream_state *stream = pipe_ctx->stream;
	struct rect surf_src = plane_state->src_rect;
	const int in_w = stream->src.width;
	const int in_h = stream->src.height;
	const int out_w = stream->dst.width;
	const int out_h = stream->dst.height;

	/*Swap surf_src height and width since scaling ratios are in recout rotation*/
	if (pipe_ctx->plane_state->rotation == ROTATION_ANGLE_90 ||
			pipe_ctx->plane_state->rotation == ROTATION_ANGLE_270)
		swap(surf_src.height, surf_src.width);

	pipe_ctx->plane_res.scl_data.ratios.horz = dc_fixpt_from_fraction(
					surf_src.width,
					plane_state->dst_rect.width);
	pipe_ctx->plane_res.scl_data.ratios.vert = dc_fixpt_from_fraction(
					surf_src.height,
					plane_state->dst_rect.height);

	if (stream->view_format == VIEW_3D_FORMAT_SIDE_BY_SIDE)
		pipe_ctx->plane_res.scl_data.ratios.horz.value *= 2;
	else if (stream->view_format == VIEW_3D_FORMAT_TOP_AND_BOTTOM)
		pipe_ctx->plane_res.scl_data.ratios.vert.value *= 2;

	pipe_ctx->plane_res.scl_data.ratios.vert.value = div64_s64(
		pipe_ctx->plane_res.scl_data.ratios.vert.value * in_h, out_h);
	pipe_ctx->plane_res.scl_data.ratios.horz.value = div64_s64(
		pipe_ctx->plane_res.scl_data.ratios.horz.value * in_w, out_w);

	pipe_ctx->plane_res.scl_data.ratios.horz_c = pipe_ctx->plane_res.scl_data.ratios.horz;
	pipe_ctx->plane_res.scl_data.ratios.vert_c = pipe_ctx->plane_res.scl_data.ratios.vert;

	if (pipe_ctx->plane_res.scl_data.format == PIXEL_FORMAT_420BPP8
			|| pipe_ctx->plane_res.scl_data.format == PIXEL_FORMAT_420BPP10) {
		pipe_ctx->plane_res.scl_data.ratios.horz_c.value /= 2;
		pipe_ctx->plane_res.scl_data.ratios.vert_c.value /= 2;
	}
	pipe_ctx->plane_res.scl_data.ratios.horz = dc_fixpt_truncate(
			pipe_ctx->plane_res.scl_data.ratios.horz, 19);
	pipe_ctx->plane_res.scl_data.ratios.vert = dc_fixpt_truncate(
			pipe_ctx->plane_res.scl_data.ratios.vert, 19);
	pipe_ctx->plane_res.scl_data.ratios.horz_c = dc_fixpt_truncate(
			pipe_ctx->plane_res.scl_data.ratios.horz_c, 19);
	pipe_ctx->plane_res.scl_data.ratios.vert_c = dc_fixpt_truncate(
			pipe_ctx->plane_res.scl_data.ratios.vert_c, 19);
}


/*
 * We completely calculate vp offset, size and inits here based entirely on scaling
 * ratios and recout for pixel perfect pipe combine.
 */
static void calculate_init_and_vp(
		bool flip_scan_dir,
		int recout_offset_within_recout_full,
		int recout_size,
		int src_size,
		int taps,
		struct fixed31_32 ratio,
		struct fixed31_32 *init,
		int *vp_offset,
		int *vp_size)
{
	struct fixed31_32 temp;
	int int_part;

	/*
	 * First of the taps starts sampling pixel number <init_int_part> corresponding to recout
	 * pixel 1. Next recout pixel samples int part of <init + scaling ratio> and so on.
	 * All following calculations are based on this logic.
	 *
	 * Init calculated according to formula:
	 * 	init = (scaling_ratio + number_of_taps + 1) / 2
	 * 	init_bot = init + scaling_ratio
	 * 	to get pixel perfect combine add the fraction from calculating vp offset
	 */
	temp = dc_fixpt_mul_int(ratio, recout_offset_within_recout_full);
	*vp_offset = dc_fixpt_floor(temp);
	temp.value &= 0xffffffff;
	*init = dc_fixpt_truncate(dc_fixpt_add(dc_fixpt_div_int(
			dc_fixpt_add_int(ratio, taps + 1), 2), temp), 19);
	/*
	 * If viewport has non 0 offset and there are more taps than covered by init then
	 * we should decrease the offset and increase init so we are never sampling
	 * outside of viewport.
	 */
	int_part = dc_fixpt_floor(*init);
	if (int_part < taps) {
		int_part = taps - int_part;
		if (int_part > *vp_offset)
			int_part = *vp_offset;
		*vp_offset -= int_part;
		*init = dc_fixpt_add_int(*init, int_part);
	}
	/*
	 * If taps are sampling outside of viewport at end of recout and there are more pixels
	 * available in the surface we should increase the viewport size, regardless set vp to
	 * only what is used.
	 */
	temp = dc_fixpt_add(*init, dc_fixpt_mul_int(ratio, recout_size - 1));
	*vp_size = dc_fixpt_floor(temp);
	if (*vp_size + *vp_offset > src_size)
		*vp_size = src_size - *vp_offset;

	/* We did all the math assuming we are scanning same direction as display does,
	 * however mirror/rotation changes how vp scans vs how it is offset. If scan direction
	 * is flipped we simply need to calculate offset from the other side of plane.
	 * Note that outside of viewport all scaling hardware works in recout space.
	 */
	if (flip_scan_dir)
		*vp_offset = src_size - *vp_offset - *vp_size;
}

static void calculate_inits_and_viewports(struct pipe_ctx *pipe_ctx)
{
	const struct dc_plane_state *plane_state = pipe_ctx->plane_state;
	const struct dc_stream_state *stream = pipe_ctx->stream;
	struct scaler_data *data = &pipe_ctx->plane_res.scl_data;
	struct rect src = plane_state->src_rect;
	int vpc_div = (data->format == PIXEL_FORMAT_420BPP8
				|| data->format == PIXEL_FORMAT_420BPP10) ? 2 : 1;
	int split_count, split_idx, ro_lb, ro_tb, recout_full_x, recout_full_y;
	bool orthogonal_rotation, flip_vert_scan_dir, flip_horz_scan_dir;

	calculate_split_count_and_index(pipe_ctx, &split_count, &split_idx);
	/*
	 * recout full is what the recout would have been if we didnt clip
	 * the source plane at all. We only care about left(ro_lb) and top(ro_tb)
	 * offsets of recout within recout full because those are the directions
	 * we scan from and therefore the only ones that affect inits.
	 */
	recout_full_x = stream->dst.x + (plane_state->dst_rect.x - stream->src.x)
			* stream->dst.width / stream->src.width;
	recout_full_y = stream->dst.y + (plane_state->dst_rect.y - stream->src.y)
			* stream->dst.height / stream->src.height;
	if (pipe_ctx->prev_odm_pipe && split_idx)
		ro_lb = data->h_active * split_idx - recout_full_x;
	else
		ro_lb = data->recout.x - recout_full_x;
	ro_tb = data->recout.y - recout_full_y;
	ASSERT(ro_lb >= 0 && ro_tb >= 0);

	/*
	 * Work in recout rotation since that requires less transformations
	 */
	get_vp_scan_direction(
			plane_state->rotation,
			plane_state->horizontal_mirror,
			&orthogonal_rotation,
			&flip_vert_scan_dir,
			&flip_horz_scan_dir);

	if (orthogonal_rotation) {
		swap(src.width, src.height);
		swap(flip_vert_scan_dir, flip_horz_scan_dir);
	}

	calculate_init_and_vp(
			flip_horz_scan_dir,
			ro_lb,
			data->recout.width,
			src.width,
			data->taps.h_taps,
			data->ratios.horz,
			&data->inits.h,
			&data->viewport.x,
			&data->viewport.width);
	calculate_init_and_vp(
			flip_horz_scan_dir,
			ro_lb,
			data->recout.width,
			src.width / vpc_div,
			data->taps.h_taps_c,
			data->ratios.horz_c,
			&data->inits.h_c,
			&data->viewport_c.x,
			&data->viewport_c.width);
	calculate_init_and_vp(
			flip_vert_scan_dir,
			ro_tb,
			data->recout.height,
			src.height,
			data->taps.v_taps,
			data->ratios.vert,
			&data->inits.v,
			&data->viewport.y,
			&data->viewport.height);
	calculate_init_and_vp(
			flip_vert_scan_dir,
			ro_tb,
			data->recout.height,
			src.height / vpc_div,
			data->taps.v_taps_c,
			data->ratios.vert_c,
			&data->inits.v_c,
			&data->viewport_c.y,
			&data->viewport_c.height);
	if (orthogonal_rotation) {
		swap(data->viewport.x, data->viewport.y);
		swap(data->viewport.width, data->viewport.height);
		swap(data->viewport_c.x, data->viewport_c.y);
		swap(data->viewport_c.width, data->viewport_c.height);
	}
	data->viewport.x += src.x;
	data->viewport.y += src.y;
	ASSERT(src.x % vpc_div == 0 && src.y % vpc_div == 0);
	data->viewport_c.x += src.x / vpc_div;
	data->viewport_c.y += src.y / vpc_div;
}

bool resource_build_scaling_params(struct pipe_ctx *pipe_ctx)
{
	const struct dc_plane_state *plane_state = pipe_ctx->plane_state;
	struct dc_crtc_timing *timing = &pipe_ctx->stream->timing;
	bool res = false;
	DC_LOGGER_INIT(pipe_ctx->stream->ctx->logger);

	pipe_ctx->plane_res.scl_data.format = convert_pixel_format_to_dalsurface(
			pipe_ctx->plane_state->format);

	/* Timing borders are part of vactive that we are also supposed to skip in addition
	 * to any stream dst offset. Since dm logic assumes dst is in addressable
	 * space we need to add the left and top borders to dst offsets temporarily.
	 * TODO: fix in DM, stream dst is supposed to be in vactive
	 */
	pipe_ctx->stream->dst.x += timing->h_border_left;
	pipe_ctx->stream->dst.y += timing->v_border_top;

	/* Calculate H and V active size */
	pipe_ctx->plane_res.scl_data.h_active = timing->h_addressable +
			timing->h_border_left + timing->h_border_right;
	pipe_ctx->plane_res.scl_data.v_active = timing->v_addressable +
		timing->v_border_top + timing->v_border_bottom;
	if (pipe_ctx->next_odm_pipe || pipe_ctx->prev_odm_pipe)
		pipe_ctx->plane_res.scl_data.h_active /= get_num_odm_splits(pipe_ctx) + 1;

	/* depends on h_active */
	calculate_recout(pipe_ctx);
	/* depends on pixel format */
	calculate_scaling_ratios(pipe_ctx);
	/* depends on scaling ratios and recout, does not calculate offset yet */
	calculate_viewport_size(pipe_ctx);

	/* Stopgap for validation of ODM + MPO on one side of screen case */
	if (pipe_ctx->plane_res.scl_data.viewport.height < 1 ||
			pipe_ctx->plane_res.scl_data.viewport.width < 1)
		return false;

	/*
	 * LB calculations depend on vp size, h/v_active and scaling ratios
	 * Setting line buffer pixel depth to 24bpp yields banding
	 * on certain displays, such as the Sharp 4k. 36bpp is needed
	 * to support SURFACE_PIXEL_FORMAT_GRPH_ARGB16161616 and
	 * SURFACE_PIXEL_FORMAT_GRPH_ABGR16161616 with actual > 10 bpc
	 * precision on at least DCN display engines. However, at least
	 * Carrizo with DCE_VERSION_11_0 does not like 36 bpp lb depth,
	 * so use only 30 bpp on DCE_VERSION_11_0. Testing with DCE 11.2 and 8.3
	 * did not show such problems, so this seems to be the exception.
	 */
	if (plane_state->ctx->dce_version > DCE_VERSION_11_0)
		pipe_ctx->plane_res.scl_data.lb_params.depth = LB_PIXEL_DEPTH_36BPP;
	else
		pipe_ctx->plane_res.scl_data.lb_params.depth = LB_PIXEL_DEPTH_30BPP;

	pipe_ctx->plane_res.scl_data.lb_params.alpha_en = plane_state->per_pixel_alpha;

	if (pipe_ctx->plane_res.xfm != NULL)
		res = pipe_ctx->plane_res.xfm->funcs->transform_get_optimal_number_of_taps(
				pipe_ctx->plane_res.xfm, &pipe_ctx->plane_res.scl_data, &plane_state->scaling_quality);

	if (pipe_ctx->plane_res.dpp != NULL)
		res = pipe_ctx->plane_res.dpp->funcs->dpp_get_optimal_number_of_taps(
				pipe_ctx->plane_res.dpp, &pipe_ctx->plane_res.scl_data, &plane_state->scaling_quality);


	if (!res) {
		/* Try 24 bpp linebuffer */
		pipe_ctx->plane_res.scl_data.lb_params.depth = LB_PIXEL_DEPTH_24BPP;

		if (pipe_ctx->plane_res.xfm != NULL)
			res = pipe_ctx->plane_res.xfm->funcs->transform_get_optimal_number_of_taps(
					pipe_ctx->plane_res.xfm,
					&pipe_ctx->plane_res.scl_data,
					&plane_state->scaling_quality);

		if (pipe_ctx->plane_res.dpp != NULL)
			res = pipe_ctx->plane_res.dpp->funcs->dpp_get_optimal_number_of_taps(
					pipe_ctx->plane_res.dpp,
					&pipe_ctx->plane_res.scl_data,
					&plane_state->scaling_quality);
	}

	/*
	 * Depends on recout, scaling ratios, h_active and taps
	 * May need to re-check lb size after this in some obscure scenario
	 */
	if (res)
		calculate_inits_and_viewports(pipe_ctx);

	/*
	 * Handle side by side and top bottom 3d recout offsets after vp calculation
	 * since 3d is special and needs to calculate vp as if there is no recout offset
	 * This may break with rotation, good thing we aren't mixing hw rotation and 3d
	 */
	if (pipe_ctx->top_pipe && pipe_ctx->top_pipe->plane_state == plane_state) {
		ASSERT(plane_state->rotation == ROTATION_ANGLE_0 ||
			(pipe_ctx->stream->view_format != VIEW_3D_FORMAT_TOP_AND_BOTTOM &&
				pipe_ctx->stream->view_format != VIEW_3D_FORMAT_SIDE_BY_SIDE));
		if (pipe_ctx->stream->view_format == VIEW_3D_FORMAT_TOP_AND_BOTTOM)
			pipe_ctx->plane_res.scl_data.recout.y += pipe_ctx->plane_res.scl_data.recout.height;
		else if (pipe_ctx->stream->view_format == VIEW_3D_FORMAT_SIDE_BY_SIDE)
			pipe_ctx->plane_res.scl_data.recout.x += pipe_ctx->plane_res.scl_data.recout.width;
	}

	if (pipe_ctx->plane_res.scl_data.viewport.height < MIN_VIEWPORT_SIZE ||
			pipe_ctx->plane_res.scl_data.viewport.width < MIN_VIEWPORT_SIZE)
		res = false;

	DC_LOG_SCALER("%s pipe %d:\nViewport: height:%d width:%d x:%d y:%d  Recout: height:%d width:%d x:%d y:%d  HACTIVE:%d VACTIVE:%d\n"
			"src_rect: height:%d width:%d x:%d y:%d  dst_rect: height:%d width:%d x:%d y:%d  clip_rect: height:%d width:%d x:%d y:%d\n",
			__func__,
			pipe_ctx->pipe_idx,
			pipe_ctx->plane_res.scl_data.viewport.height,
			pipe_ctx->plane_res.scl_data.viewport.width,
			pipe_ctx->plane_res.scl_data.viewport.x,
			pipe_ctx->plane_res.scl_data.viewport.y,
			pipe_ctx->plane_res.scl_data.recout.height,
			pipe_ctx->plane_res.scl_data.recout.width,
			pipe_ctx->plane_res.scl_data.recout.x,
			pipe_ctx->plane_res.scl_data.recout.y,
			pipe_ctx->plane_res.scl_data.h_active,
			pipe_ctx->plane_res.scl_data.v_active,
			plane_state->src_rect.height,
			plane_state->src_rect.width,
			plane_state->src_rect.x,
			plane_state->src_rect.y,
			plane_state->dst_rect.height,
			plane_state->dst_rect.width,
			plane_state->dst_rect.x,
			plane_state->dst_rect.y,
			plane_state->clip_rect.height,
			plane_state->clip_rect.width,
			plane_state->clip_rect.x,
			plane_state->clip_rect.y);

	pipe_ctx->stream->dst.x -= timing->h_border_left;
	pipe_ctx->stream->dst.y -= timing->v_border_top;

	return res;
}


enum dc_status resource_build_scaling_params_for_context(
	const struct dc  *dc,
	struct dc_state *context)
{
	int i;

	for (i = 0; i < MAX_PIPES; i++) {
		if (context->res_ctx.pipe_ctx[i].plane_state != NULL &&
				context->res_ctx.pipe_ctx[i].stream != NULL)
			if (!resource_build_scaling_params(&context->res_ctx.pipe_ctx[i]))
				return DC_FAIL_SCALING;
	}

	return DC_OK;
}

struct pipe_ctx *find_idle_secondary_pipe(
		struct resource_context *res_ctx,
		const struct resource_pool *pool,
		const struct pipe_ctx *primary_pipe)
{
	int i;
	struct pipe_ctx *secondary_pipe = NULL;

	/*
	 * We add a preferred pipe mapping to avoid the chance that
	 * MPCCs already in use will need to be reassigned to other trees.
	 * For example, if we went with the strict, assign backwards logic:
	 *
	 * (State 1)
	 * Display A on, no surface, top pipe = 0
	 * Display B on, no surface, top pipe = 1
	 *
	 * (State 2)
	 * Display A on, no surface, top pipe = 0
	 * Display B on, surface enable, top pipe = 1, bottom pipe = 5
	 *
	 * (State 3)
	 * Display A on, surface enable, top pipe = 0, bottom pipe = 5
	 * Display B on, surface enable, top pipe = 1, bottom pipe = 4
	 *
	 * The state 2->3 transition requires remapping MPCC 5 from display B
	 * to display A.
	 *
	 * However, with the preferred pipe logic, state 2 would look like:
	 *
	 * (State 2)
	 * Display A on, no surface, top pipe = 0
	 * Display B on, surface enable, top pipe = 1, bottom pipe = 4
	 *
	 * This would then cause 2->3 to not require remapping any MPCCs.
	 */
	if (primary_pipe) {
		int preferred_pipe_idx = (pool->pipe_count - 1) - primary_pipe->pipe_idx;
		if (res_ctx->pipe_ctx[preferred_pipe_idx].stream == NULL) {
			secondary_pipe = &res_ctx->pipe_ctx[preferred_pipe_idx];
			secondary_pipe->pipe_idx = preferred_pipe_idx;
		}
	}

	/*
	 * search backwards for the second pipe to keep pipe
	 * assignment more consistent
	 */
	if (!secondary_pipe)
		for (i = pool->pipe_count - 1; i >= 0; i--) {
			if (res_ctx->pipe_ctx[i].stream == NULL) {
				secondary_pipe = &res_ctx->pipe_ctx[i];
				secondary_pipe->pipe_idx = i;
				break;
			}
		}

	return secondary_pipe;
}

struct pipe_ctx *resource_get_head_pipe_for_stream(
		struct resource_context *res_ctx,
		struct dc_stream_state *stream)
{
	int i;

	for (i = 0; i < MAX_PIPES; i++) {
		if (res_ctx->pipe_ctx[i].stream == stream
				&& !res_ctx->pipe_ctx[i].top_pipe
				&& !res_ctx->pipe_ctx[i].prev_odm_pipe)
			return &res_ctx->pipe_ctx[i];
	}
	return NULL;
}

static struct pipe_ctx *resource_get_tail_pipe(
		struct resource_context *res_ctx,
		struct pipe_ctx *head_pipe)
{
	struct pipe_ctx *tail_pipe;

	tail_pipe = head_pipe->bottom_pipe;

	while (tail_pipe) {
		head_pipe = tail_pipe;
		tail_pipe = tail_pipe->bottom_pipe;
	}

	return head_pipe;
}

/*
 * A free_pipe for a stream is defined here as a pipe
 * that has no surface attached yet
 */
static struct pipe_ctx *acquire_free_pipe_for_head(
		struct dc_state *context,
		const struct resource_pool *pool,
		struct pipe_ctx *head_pipe)
{
	int i;
	struct resource_context *res_ctx = &context->res_ctx;

	if (!head_pipe->plane_state)
		return head_pipe;

	/* Re-use pipe already acquired for this stream if available*/
	for (i = pool->pipe_count - 1; i >= 0; i--) {
		if (res_ctx->pipe_ctx[i].stream == head_pipe->stream &&
				!res_ctx->pipe_ctx[i].plane_state) {
			return &res_ctx->pipe_ctx[i];
		}
	}

	/*
	 * At this point we have no re-useable pipe for this stream and we need
	 * to acquire an idle one to satisfy the request
	 */

	if (!pool->funcs->acquire_idle_pipe_for_layer)
		return NULL;

	return pool->funcs->acquire_idle_pipe_for_layer(context, pool, head_pipe->stream);
}

#if defined(CONFIG_DRM_AMD_DC_DCN)
static int acquire_first_split_pipe(
		struct resource_context *res_ctx,
		const struct resource_pool *pool,
		struct dc_stream_state *stream)
{
	int i;

	for (i = 0; i < pool->pipe_count; i++) {
		struct pipe_ctx *split_pipe = &res_ctx->pipe_ctx[i];

		if (split_pipe->top_pipe &&
				split_pipe->top_pipe->plane_state == split_pipe->plane_state) {
			split_pipe->top_pipe->bottom_pipe = split_pipe->bottom_pipe;
			if (split_pipe->bottom_pipe)
				split_pipe->bottom_pipe->top_pipe = split_pipe->top_pipe;

			if (split_pipe->top_pipe->plane_state)
				resource_build_scaling_params(split_pipe->top_pipe);

			memset(split_pipe, 0, sizeof(*split_pipe));
			split_pipe->stream_res.tg = pool->timing_generators[i];
			split_pipe->plane_res.hubp = pool->hubps[i];
			split_pipe->plane_res.ipp = pool->ipps[i];
			split_pipe->plane_res.dpp = pool->dpps[i];
			split_pipe->stream_res.opp = pool->opps[i];
			split_pipe->plane_res.mpcc_inst = pool->dpps[i]->inst;
			split_pipe->pipe_idx = i;

			split_pipe->stream = stream;
			return i;
		}
	}
	return -1;
}
#endif

bool dc_add_plane_to_context(
		const struct dc *dc,
		struct dc_stream_state *stream,
		struct dc_plane_state *plane_state,
		struct dc_state *context)
{
	int i;
	struct resource_pool *pool = dc->res_pool;
	struct pipe_ctx *head_pipe, *tail_pipe, *free_pipe;
	struct dc_stream_status *stream_status = NULL;

	for (i = 0; i < context->stream_count; i++)
		if (context->streams[i] == stream) {
			stream_status = &context->stream_status[i];
			break;
		}
	if (stream_status == NULL) {
		dm_error("Existing stream not found; failed to attach surface!\n");
		return false;
	}


	if (stream_status->plane_count == MAX_SURFACE_NUM) {
		dm_error("Surface: can not attach plane_state %p! Maximum is: %d\n",
				plane_state, MAX_SURFACE_NUM);
		return false;
	}

	head_pipe = resource_get_head_pipe_for_stream(&context->res_ctx, stream);

	if (!head_pipe) {
		dm_error("Head pipe not found for stream_state %p !\n", stream);
		return false;
	}

	/* retain new surface, but only once per stream */
	dc_plane_state_retain(plane_state);

	while (head_pipe) {
		free_pipe = acquire_free_pipe_for_head(context, pool, head_pipe);

	#if defined(CONFIG_DRM_AMD_DC_DCN)
		if (!free_pipe) {
			int pipe_idx = acquire_first_split_pipe(&context->res_ctx, pool, stream);
			if (pipe_idx >= 0)
				free_pipe = &context->res_ctx.pipe_ctx[pipe_idx];
		}
	#endif
		if (!free_pipe) {
			dc_plane_state_release(plane_state);
			return false;
		}

		free_pipe->plane_state = plane_state;

		if (head_pipe != free_pipe) {
			tail_pipe = resource_get_tail_pipe(&context->res_ctx, head_pipe);
			ASSERT(tail_pipe);
			free_pipe->stream_res.tg = tail_pipe->stream_res.tg;
			free_pipe->stream_res.abm = tail_pipe->stream_res.abm;
			free_pipe->stream_res.opp = tail_pipe->stream_res.opp;
			free_pipe->stream_res.stream_enc = tail_pipe->stream_res.stream_enc;
			free_pipe->stream_res.audio = tail_pipe->stream_res.audio;
			free_pipe->clock_source = tail_pipe->clock_source;
			free_pipe->top_pipe = tail_pipe;
			tail_pipe->bottom_pipe = free_pipe;
			if (!free_pipe->next_odm_pipe && tail_pipe->next_odm_pipe && tail_pipe->next_odm_pipe->bottom_pipe) {
				free_pipe->next_odm_pipe = tail_pipe->next_odm_pipe->bottom_pipe;
				tail_pipe->next_odm_pipe->bottom_pipe->prev_odm_pipe = free_pipe;
			}
			if (!free_pipe->prev_odm_pipe && tail_pipe->prev_odm_pipe && tail_pipe->prev_odm_pipe->bottom_pipe) {
				free_pipe->prev_odm_pipe = tail_pipe->prev_odm_pipe->bottom_pipe;
				tail_pipe->prev_odm_pipe->bottom_pipe->next_odm_pipe = free_pipe;
			}
		}
		head_pipe = head_pipe->next_odm_pipe;
	}
	/* assign new surfaces*/
	stream_status->plane_states[stream_status->plane_count] = plane_state;

	stream_status->plane_count++;

	return true;
}

bool dc_remove_plane_from_context(
		const struct dc *dc,
		struct dc_stream_state *stream,
		struct dc_plane_state *plane_state,
		struct dc_state *context)
{
	int i;
	struct dc_stream_status *stream_status = NULL;
	struct resource_pool *pool = dc->res_pool;

	for (i = 0; i < context->stream_count; i++)
		if (context->streams[i] == stream) {
			stream_status = &context->stream_status[i];
			break;
		}

	if (stream_status == NULL) {
		dm_error("Existing stream not found; failed to remove plane.\n");
		return false;
	}

	/* release pipe for plane*/
	for (i = pool->pipe_count - 1; i >= 0; i--) {
		struct pipe_ctx *pipe_ctx = &context->res_ctx.pipe_ctx[i];

		if (pipe_ctx->plane_state == plane_state) {
			if (pipe_ctx->top_pipe)
				pipe_ctx->top_pipe->bottom_pipe = pipe_ctx->bottom_pipe;

			/* Second condition is to avoid setting NULL to top pipe
			 * of tail pipe making it look like head pipe in subsequent
			 * deletes
			 */
			if (pipe_ctx->bottom_pipe && pipe_ctx->top_pipe)
				pipe_ctx->bottom_pipe->top_pipe = pipe_ctx->top_pipe;

			/*
			 * For head pipe detach surfaces from pipe for tail
			 * pipe just zero it out
			 */
			if (!pipe_ctx->top_pipe)
				pipe_ctx->plane_state = NULL;
			else
				memset(pipe_ctx, 0, sizeof(*pipe_ctx));
		}
	}


	for (i = 0; i < stream_status->plane_count; i++) {
		if (stream_status->plane_states[i] == plane_state) {

			dc_plane_state_release(stream_status->plane_states[i]);
			break;
		}
	}

	if (i == stream_status->plane_count) {
		dm_error("Existing plane_state not found; failed to detach it!\n");
		return false;
	}

	stream_status->plane_count--;

	/* Start at the plane we've just released, and move all the planes one index forward to "trim" the array */
	for (; i < stream_status->plane_count; i++)
		stream_status->plane_states[i] = stream_status->plane_states[i + 1];

	stream_status->plane_states[stream_status->plane_count] = NULL;

	return true;
}

bool dc_rem_all_planes_for_stream(
		const struct dc *dc,
		struct dc_stream_state *stream,
		struct dc_state *context)
{
	int i, old_plane_count;
	struct dc_stream_status *stream_status = NULL;
	struct dc_plane_state *del_planes[MAX_SURFACE_NUM] = { 0 };

	for (i = 0; i < context->stream_count; i++)
			if (context->streams[i] == stream) {
				stream_status = &context->stream_status[i];
				break;
			}

	if (stream_status == NULL) {
		dm_error("Existing stream %p not found!\n", stream);
		return false;
	}

	old_plane_count = stream_status->plane_count;

	for (i = 0; i < old_plane_count; i++)
		del_planes[i] = stream_status->plane_states[i];

	for (i = 0; i < old_plane_count; i++)
		if (!dc_remove_plane_from_context(dc, stream, del_planes[i], context))
			return false;

	return true;
}

static bool add_all_planes_for_stream(
		const struct dc *dc,
		struct dc_stream_state *stream,
		const struct dc_validation_set set[],
		int set_count,
		struct dc_state *context)
{
	int i, j;

	for (i = 0; i < set_count; i++)
		if (set[i].stream == stream)
			break;

	if (i == set_count) {
		dm_error("Stream %p not found in set!\n", stream);
		return false;
	}

	for (j = 0; j < set[i].plane_count; j++)
		if (!dc_add_plane_to_context(dc, stream, set[i].plane_states[j], context))
			return false;

	return true;
}

bool dc_add_all_planes_for_stream(
		const struct dc *dc,
		struct dc_stream_state *stream,
		struct dc_plane_state * const *plane_states,
		int plane_count,
		struct dc_state *context)
{
	struct dc_validation_set set;
	int i;

	set.stream = stream;
	set.plane_count = plane_count;

	for (i = 0; i < plane_count; i++)
		set.plane_states[i] = plane_states[i];

	return add_all_planes_for_stream(dc, stream, &set, 1, context);
}

static bool is_timing_changed(struct dc_stream_state *cur_stream,
		struct dc_stream_state *new_stream)
{
	if (cur_stream == NULL)
		return true;

	/* If output color space is changed, need to reprogram info frames */
	if (cur_stream->output_color_space != new_stream->output_color_space)
		return true;

	return memcmp(
		&cur_stream->timing,
		&new_stream->timing,
		sizeof(struct dc_crtc_timing)) != 0;
}

static bool are_stream_backends_same(
	struct dc_stream_state *stream_a, struct dc_stream_state *stream_b)
{
	if (stream_a == stream_b)
		return true;

	if (stream_a == NULL || stream_b == NULL)
		return false;

	if (is_timing_changed(stream_a, stream_b))
		return false;

	if (stream_a->dpms_off != stream_b->dpms_off)
		return false;

	return true;
}

/*
 * dc_is_stream_unchanged() - Compare two stream states for equivalence.
 *
 * Checks if there a difference between the two states
 * that would require a mode change.
 *
 * Does not compare cursor position or attributes.
 */
bool dc_is_stream_unchanged(
	struct dc_stream_state *old_stream, struct dc_stream_state *stream)
{

	if (!are_stream_backends_same(old_stream, stream))
		return false;

	if (old_stream->ignore_msa_timing_param != stream->ignore_msa_timing_param)
		return false;

	return true;
}

/*
 * dc_is_stream_scaling_unchanged() - Compare scaling rectangles of two streams.
 */
bool dc_is_stream_scaling_unchanged(
	struct dc_stream_state *old_stream, struct dc_stream_state *stream)
{
	if (old_stream == stream)
		return true;

	if (old_stream == NULL || stream == NULL)
		return false;

	if (memcmp(&old_stream->src,
			&stream->src,
			sizeof(struct rect)) != 0)
		return false;

	if (memcmp(&old_stream->dst,
			&stream->dst,
			sizeof(struct rect)) != 0)
		return false;

	return true;
}

static void update_stream_engine_usage(
		struct resource_context *res_ctx,
		const struct resource_pool *pool,
		struct stream_encoder *stream_enc,
		bool acquired)
{
	int i;

	for (i = 0; i < pool->stream_enc_count; i++) {
		if (pool->stream_enc[i] == stream_enc)
			res_ctx->is_stream_enc_acquired[i] = acquired;
	}
}

#if defined(CONFIG_DRM_AMD_DC_DCN)
static void update_hpo_dp_stream_engine_usage(
		struct resource_context *res_ctx,
		const struct resource_pool *pool,
		struct hpo_dp_stream_encoder *hpo_dp_stream_enc,
		bool acquired)
{
	int i;

	for (i = 0; i < pool->hpo_dp_stream_enc_count; i++) {
		if (pool->hpo_dp_stream_enc[i] == hpo_dp_stream_enc)
			res_ctx->is_hpo_dp_stream_enc_acquired[i] = acquired;
	}
}
#endif

/* TODO: release audio object */
void update_audio_usage(
		struct resource_context *res_ctx,
		const struct resource_pool *pool,
		struct audio *audio,
		bool acquired)
{
	int i;
	for (i = 0; i < pool->audio_count; i++) {
		if (pool->audios[i] == audio)
			res_ctx->is_audio_acquired[i] = acquired;
	}
}

static int acquire_first_free_pipe(
		struct resource_context *res_ctx,
		const struct resource_pool *pool,
		struct dc_stream_state *stream)
{
	int i;

	for (i = 0; i < pool->pipe_count; i++) {
		if (!res_ctx->pipe_ctx[i].stream) {
			struct pipe_ctx *pipe_ctx = &res_ctx->pipe_ctx[i];

			pipe_ctx->stream_res.tg = pool->timing_generators[i];
			pipe_ctx->plane_res.mi = pool->mis[i];
			pipe_ctx->plane_res.hubp = pool->hubps[i];
			pipe_ctx->plane_res.ipp = pool->ipps[i];
			pipe_ctx->plane_res.xfm = pool->transforms[i];
			pipe_ctx->plane_res.dpp = pool->dpps[i];
			pipe_ctx->stream_res.opp = pool->opps[i];
			if (pool->dpps[i])
				pipe_ctx->plane_res.mpcc_inst = pool->dpps[i]->inst;
			pipe_ctx->pipe_idx = i;


			pipe_ctx->stream = stream;
			return i;
		}
	}
	return -1;
}

#if defined(CONFIG_DRM_AMD_DC_DCN)
static struct hpo_dp_stream_encoder *find_first_free_match_hpo_dp_stream_enc_for_link(
		struct resource_context *res_ctx,
		const struct resource_pool *pool,
		struct dc_stream_state *stream)
{
	int i;

	for (i = 0; i < pool->hpo_dp_stream_enc_count; i++) {
		if (!res_ctx->is_hpo_dp_stream_enc_acquired[i] &&
				pool->hpo_dp_stream_enc[i]) {

			return pool->hpo_dp_stream_enc[i];
		}
	}

	return NULL;
}
#endif

static struct audio *find_first_free_audio(
		struct resource_context *res_ctx,
		const struct resource_pool *pool,
		enum engine_id id,
		enum dce_version dc_version)
{
	int i, available_audio_count;

	available_audio_count = pool->audio_count;

	for (i = 0; i < available_audio_count; i++) {
		if ((res_ctx->is_audio_acquired[i] == false) && (res_ctx->is_stream_enc_acquired[i] == true)) {
			/*we have enough audio endpoint, find the matching inst*/
			if (id != i)
				continue;
			return pool->audios[i];
		}
	}

	/* use engine id to find free audio */
	if ((id < available_audio_count) && (res_ctx->is_audio_acquired[id] == false)) {
		return pool->audios[id];
	}
	/*not found the matching one, first come first serve*/
	for (i = 0; i < available_audio_count; i++) {
		if (res_ctx->is_audio_acquired[i] == false) {
			return pool->audios[i];
		}
	}
	return 0;
}

/*
 * dc_add_stream_to_ctx() - Add a new dc_stream_state to a dc_state.
 */
enum dc_status dc_add_stream_to_ctx(
		struct dc *dc,
		struct dc_state *new_ctx,
		struct dc_stream_state *stream)
{
	enum dc_status res;
	DC_LOGGER_INIT(dc->ctx->logger);

	if (new_ctx->stream_count >= dc->res_pool->timing_generator_count) {
		DC_LOG_WARNING("Max streams reached, can't add stream %p !\n", stream);
		return DC_ERROR_UNEXPECTED;
	}

	new_ctx->streams[new_ctx->stream_count] = stream;
	dc_stream_retain(stream);
	new_ctx->stream_count++;

	res = dc->res_pool->funcs->add_stream_to_ctx(dc, new_ctx, stream);
	if (res != DC_OK)
		DC_LOG_WARNING("Adding stream %p to context failed with err %d!\n", stream, res);

	return res;
}

/*
 * dc_remove_stream_from_ctx() - Remove a stream from a dc_state.
 */
enum dc_status dc_remove_stream_from_ctx(
			struct dc *dc,
			struct dc_state *new_ctx,
			struct dc_stream_state *stream)
{
	int i;
	struct dc_context *dc_ctx = dc->ctx;
	struct pipe_ctx *del_pipe = resource_get_head_pipe_for_stream(&new_ctx->res_ctx, stream);
	struct pipe_ctx *odm_pipe;

	if (!del_pipe) {
		DC_ERROR("Pipe not found for stream %p !\n", stream);
		return DC_ERROR_UNEXPECTED;
	}

	odm_pipe = del_pipe->next_odm_pipe;

	/* Release primary pipe */
	ASSERT(del_pipe->stream_res.stream_enc);
	update_stream_engine_usage(
			&new_ctx->res_ctx,
				dc->res_pool,
			del_pipe->stream_res.stream_enc,
			false);
	/* Release link encoder from stream in new dc_state. */
	if (dc->res_pool->funcs->link_enc_unassign)
		dc->res_pool->funcs->link_enc_unassign(new_ctx, del_pipe->stream);

#if defined(CONFIG_DRM_AMD_DC_DCN)
	if (is_dp_128b_132b_signal(del_pipe)) {
		update_hpo_dp_stream_engine_usage(
			&new_ctx->res_ctx, dc->res_pool,
			del_pipe->stream_res.hpo_dp_stream_enc,
			false);
	}
#endif

	if (del_pipe->stream_res.audio)
		update_audio_usage(
			&new_ctx->res_ctx,
			dc->res_pool,
			del_pipe->stream_res.audio,
			false);

	resource_unreference_clock_source(&new_ctx->res_ctx,
					  dc->res_pool,
					  del_pipe->clock_source);

	if (dc->res_pool->funcs->remove_stream_from_ctx)
		dc->res_pool->funcs->remove_stream_from_ctx(dc, new_ctx, stream);

	while (odm_pipe) {
		struct pipe_ctx *next_odm_pipe = odm_pipe->next_odm_pipe;

		memset(odm_pipe, 0, sizeof(*odm_pipe));
		odm_pipe = next_odm_pipe;
	}
	memset(del_pipe, 0, sizeof(*del_pipe));

	for (i = 0; i < new_ctx->stream_count; i++)
		if (new_ctx->streams[i] == stream)
			break;

	if (new_ctx->streams[i] != stream) {
		DC_ERROR("Context doesn't have stream %p !\n", stream);
		return DC_ERROR_UNEXPECTED;
	}

	dc_stream_release(new_ctx->streams[i]);
	new_ctx->stream_count--;

	/* Trim back arrays */
	for (; i < new_ctx->stream_count; i++) {
		new_ctx->streams[i] = new_ctx->streams[i + 1];
		new_ctx->stream_status[i] = new_ctx->stream_status[i + 1];
	}

	new_ctx->streams[new_ctx->stream_count] = NULL;
	memset(
			&new_ctx->stream_status[new_ctx->stream_count],
			0,
			sizeof(new_ctx->stream_status[0]));

	return DC_OK;
}

static struct dc_stream_state *find_pll_sharable_stream(
		struct dc_stream_state *stream_needs_pll,
		struct dc_state *context)
{
	int i;

	for (i = 0; i < context->stream_count; i++) {
		struct dc_stream_state *stream_has_pll = context->streams[i];

		/* We are looking for non dp, non virtual stream */
		if (resource_are_streams_timing_synchronizable(
			stream_needs_pll, stream_has_pll)
			&& !dc_is_dp_signal(stream_has_pll->signal)
			&& stream_has_pll->link->connector_signal
			!= SIGNAL_TYPE_VIRTUAL)
			return stream_has_pll;

	}

	return NULL;
}

static int get_norm_pix_clk(const struct dc_crtc_timing *timing)
{
	uint32_t pix_clk = timing->pix_clk_100hz;
	uint32_t normalized_pix_clk = pix_clk;

	if (timing->pixel_encoding == PIXEL_ENCODING_YCBCR420)
		pix_clk /= 2;
	if (timing->pixel_encoding != PIXEL_ENCODING_YCBCR422) {
		switch (timing->display_color_depth) {
		case COLOR_DEPTH_666:
		case COLOR_DEPTH_888:
			normalized_pix_clk = pix_clk;
			break;
		case COLOR_DEPTH_101010:
			normalized_pix_clk = (pix_clk * 30) / 24;
			break;
		case COLOR_DEPTH_121212:
			normalized_pix_clk = (pix_clk * 36) / 24;
		break;
		case COLOR_DEPTH_161616:
			normalized_pix_clk = (pix_clk * 48) / 24;
		break;
		default:
			ASSERT(0);
		break;
		}
	}
	return normalized_pix_clk;
}

static void calculate_phy_pix_clks(struct dc_stream_state *stream)
{
	/* update actual pixel clock on all streams */
	if (dc_is_hdmi_signal(stream->signal))
		stream->phy_pix_clk = get_norm_pix_clk(
			&stream->timing) / 10;
	else
		stream->phy_pix_clk =
			stream->timing.pix_clk_100hz / 10;

	if (stream->timing.timing_3d_format == TIMING_3D_FORMAT_HW_FRAME_PACKING)
		stream->phy_pix_clk *= 2;
}

static int acquire_resource_from_hw_enabled_state(
		struct resource_context *res_ctx,
		const struct resource_pool *pool,
		struct dc_stream_state *stream)
{
	struct dc_link *link = stream->link;
	unsigned int i, inst, tg_inst = 0;

	/* Check for enabled DIG to identify enabled display */
	if (!link->link_enc->funcs->is_dig_enabled(link->link_enc))
		return -1;

	inst = link->link_enc->funcs->get_dig_frontend(link->link_enc);

	if (inst == ENGINE_ID_UNKNOWN)
		return -1;

	for (i = 0; i < pool->stream_enc_count; i++) {
		if (pool->stream_enc[i]->id == inst) {
			tg_inst = pool->stream_enc[i]->funcs->dig_source_otg(
				pool->stream_enc[i]);
			break;
		}
	}

	// tg_inst not found
	if (i == pool->stream_enc_count)
		return -1;

	if (tg_inst >= pool->timing_generator_count)
		return -1;

	if (!res_ctx->pipe_ctx[tg_inst].stream) {
		struct pipe_ctx *pipe_ctx = &res_ctx->pipe_ctx[tg_inst];

		pipe_ctx->stream_res.tg = pool->timing_generators[tg_inst];
		pipe_ctx->plane_res.mi = pool->mis[tg_inst];
		pipe_ctx->plane_res.hubp = pool->hubps[tg_inst];
		pipe_ctx->plane_res.ipp = pool->ipps[tg_inst];
		pipe_ctx->plane_res.xfm = pool->transforms[tg_inst];
		pipe_ctx->plane_res.dpp = pool->dpps[tg_inst];
		pipe_ctx->stream_res.opp = pool->opps[tg_inst];

		if (pool->dpps[tg_inst]) {
			pipe_ctx->plane_res.mpcc_inst = pool->dpps[tg_inst]->inst;

			// Read DPP->MPCC->OPP Pipe from HW State
			if (pool->mpc->funcs->read_mpcc_state) {
				struct mpcc_state s = {0};

				pool->mpc->funcs->read_mpcc_state(pool->mpc, pipe_ctx->plane_res.mpcc_inst, &s);

				if (s.dpp_id < MAX_MPCC)
					pool->mpc->mpcc_array[pipe_ctx->plane_res.mpcc_inst].dpp_id = s.dpp_id;

				if (s.bot_mpcc_id < MAX_MPCC)
					pool->mpc->mpcc_array[pipe_ctx->plane_res.mpcc_inst].mpcc_bot =
							&pool->mpc->mpcc_array[s.bot_mpcc_id];

				if (s.opp_id < MAX_OPP)
					pipe_ctx->stream_res.opp->mpc_tree_params.opp_id = s.opp_id;
			}
		}
		pipe_ctx->pipe_idx = tg_inst;

		pipe_ctx->stream = stream;
		return tg_inst;
	}

	return -1;
}

static void mark_seamless_boot_stream(
		const struct dc  *dc,
		struct dc_stream_state *stream)
{
	struct dc_bios *dcb = dc->ctx->dc_bios;

	/* TODO: Check Linux */
	if (dc->config.allow_seamless_boot_optimization &&
			!dcb->funcs->is_accelerated_mode(dcb)) {
		if (dc_validate_seamless_boot_timing(dc, stream->sink, &stream->timing))
			stream->apply_seamless_boot_optimization = true;
	}
}

enum dc_status resource_map_pool_resources(
		const struct dc  *dc,
		struct dc_state *context,
		struct dc_stream_state *stream)
{
	const struct resource_pool *pool = dc->res_pool;
	int i;
	struct dc_context *dc_ctx = dc->ctx;
	struct pipe_ctx *pipe_ctx = NULL;
	int pipe_idx = -1;

	calculate_phy_pix_clks(stream);

	mark_seamless_boot_stream(dc, stream);

	if (stream->apply_seamless_boot_optimization) {
		pipe_idx = acquire_resource_from_hw_enabled_state(
				&context->res_ctx,
				pool,
				stream);
		if (pipe_idx < 0)
			/* hw resource was assigned to other stream */
			stream->apply_seamless_boot_optimization = false;
	}

	if (pipe_idx < 0)
		/* acquire new resources */
		pipe_idx = acquire_first_free_pipe(&context->res_ctx, pool, stream);

#ifdef CONFIG_DRM_AMD_DC_DCN
	if (pipe_idx < 0)
		pipe_idx = acquire_first_split_pipe(&context->res_ctx, pool, stream);
#endif

	if (pipe_idx < 0 || context->res_ctx.pipe_ctx[pipe_idx].stream_res.tg == NULL)
		return DC_NO_CONTROLLER_RESOURCE;

	pipe_ctx = &context->res_ctx.pipe_ctx[pipe_idx];

	pipe_ctx->stream_res.stream_enc =
		dc->res_pool->funcs->find_first_free_match_stream_enc_for_link(
			&context->res_ctx, pool, stream);

	if (!pipe_ctx->stream_res.stream_enc)
		return DC_NO_STREAM_ENC_RESOURCE;

	update_stream_engine_usage(
		&context->res_ctx, pool,
		pipe_ctx->stream_res.stream_enc,
		true);

#if defined(CONFIG_DRM_AMD_DC_DCN)
	/* Allocate DP HPO Stream Encoder based on signal, hw capabilities
	 * and link settings
	 */
	if (dc_is_dp_signal(stream->signal) &&
			dc->caps.dp_hpo) {
		struct dc_link_settings link_settings = {0};

		decide_link_settings(stream, &link_settings);
		if (dp_get_link_encoding_format(&link_settings) == DP_128b_132b_ENCODING) {
			pipe_ctx->stream_res.hpo_dp_stream_enc =
					find_first_free_match_hpo_dp_stream_enc_for_link(
							&context->res_ctx, pool, stream);

			if (!pipe_ctx->stream_res.hpo_dp_stream_enc)
				return DC_NO_STREAM_ENC_RESOURCE;

			update_hpo_dp_stream_engine_usage(
					&context->res_ctx, pool,
					pipe_ctx->stream_res.hpo_dp_stream_enc,
					true);
		}
	}
#endif

	/* TODO: Add check if ASIC support and EDID audio */
	if (!stream->converter_disable_audio &&
	    dc_is_audio_capable_signal(pipe_ctx->stream->signal) &&
	    stream->audio_info.mode_count && stream->audio_info.flags.all) {
		pipe_ctx->stream_res.audio = find_first_free_audio(
		&context->res_ctx, pool, pipe_ctx->stream_res.stream_enc->id, dc_ctx->dce_version);

		/*
		 * Audio assigned in order first come first get.
		 * There are asics which has number of audio
		 * resources less then number of pipes
		 */
		if (pipe_ctx->stream_res.audio)
			update_audio_usage(&context->res_ctx, pool,
					   pipe_ctx->stream_res.audio, true);
	}

	/* Add ABM to the resource if on EDP */
	if (pipe_ctx->stream && dc_is_embedded_signal(pipe_ctx->stream->signal)) {
#if defined(CONFIG_DRM_AMD_DC_DCN)
		if (pool->abm)
			pipe_ctx->stream_res.abm = pool->abm;
		else
			pipe_ctx->stream_res.abm = pool->multiple_abms[pipe_ctx->stream_res.tg->inst];
#else
		pipe_ctx->stream_res.abm = pool->abm;
#endif
	}

	for (i = 0; i < context->stream_count; i++)
		if (context->streams[i] == stream) {
			context->stream_status[i].primary_otg_inst = pipe_ctx->stream_res.tg->inst;
			context->stream_status[i].stream_enc_inst = pipe_ctx->stream_res.stream_enc->stream_enc_inst;
			context->stream_status[i].audio_inst =
				pipe_ctx->stream_res.audio ? pipe_ctx->stream_res.audio->inst : -1;

			return DC_OK;
		}

	DC_ERROR("Stream %p not found in new ctx!\n", stream);
	return DC_ERROR_UNEXPECTED;
}

/**
 * dc_resource_state_copy_construct_current() - Creates a new dc_state from existing state
 * Is a shallow copy.  Increments refcounts on existing streams and planes.
 * @dc: copy out of dc->current_state
 * @dst_ctx: copy into this
 */
void dc_resource_state_copy_construct_current(
		const struct dc *dc,
		struct dc_state *dst_ctx)
{
	dc_resource_state_copy_construct(dc->current_state, dst_ctx);
}


void dc_resource_state_construct(
		const struct dc *dc,
		struct dc_state *dst_ctx)
{
	dst_ctx->clk_mgr = dc->clk_mgr;
}


bool dc_resource_is_dsc_encoding_supported(const struct dc *dc)
{
	return dc->res_pool->res_cap->num_dsc > 0;
}


/**
 * dc_validate_global_state() - Determine if HW can support a given state
 * Checks HW resource availability and bandwidth requirement.
 * @dc: dc struct for this driver
 * @new_ctx: state to be validated
 * @fast_validate: set to true if only yes/no to support matters
 *
 * Return: DC_OK if the result can be programmed.  Otherwise, an error code.
 */
enum dc_status dc_validate_global_state(
		struct dc *dc,
		struct dc_state *new_ctx,
		bool fast_validate)
{
	enum dc_status result = DC_ERROR_UNEXPECTED;
	int i, j;

	if (!new_ctx)
		return DC_ERROR_UNEXPECTED;
#if defined(CONFIG_DRM_AMD_DC_DCN)

	/*
	 * Update link encoder to stream assignment.
	 * TODO: Split out reason allocation from validation.
	 */
	if (dc->res_pool->funcs->link_encs_assign && fast_validate == false)
		dc->res_pool->funcs->link_encs_assign(
			dc, new_ctx, new_ctx->streams, new_ctx->stream_count);
#endif

	if (dc->res_pool->funcs->validate_global) {
		result = dc->res_pool->funcs->validate_global(dc, new_ctx);
		if (result != DC_OK)
			return result;
	}

	for (i = 0; i < new_ctx->stream_count; i++) {
		struct dc_stream_state *stream = new_ctx->streams[i];

		for (j = 0; j < dc->res_pool->pipe_count; j++) {
			struct pipe_ctx *pipe_ctx = &new_ctx->res_ctx.pipe_ctx[j];

			if (pipe_ctx->stream != stream)
				continue;

			if (dc->res_pool->funcs->patch_unknown_plane_state &&
					pipe_ctx->plane_state &&
					pipe_ctx->plane_state->tiling_info.gfx9.swizzle == DC_SW_UNKNOWN) {
				result = dc->res_pool->funcs->patch_unknown_plane_state(pipe_ctx->plane_state);
				if (result != DC_OK)
					return result;
			}

			/* Switch to dp clock source only if there is
			 * no non dp stream that shares the same timing
			 * with the dp stream.
			 */
			if (dc_is_dp_signal(pipe_ctx->stream->signal) &&
				!find_pll_sharable_stream(stream, new_ctx)) {

				resource_unreference_clock_source(
						&new_ctx->res_ctx,
						dc->res_pool,
						pipe_ctx->clock_source);

				pipe_ctx->clock_source = dc->res_pool->dp_clock_source;
				resource_reference_clock_source(
						&new_ctx->res_ctx,
						dc->res_pool,
						 pipe_ctx->clock_source);
			}
		}
	}

	result = resource_build_scaling_params_for_context(dc, new_ctx);

	if (result == DC_OK)
		if (!dc->res_pool->funcs->validate_bandwidth(dc, new_ctx, fast_validate))
			result = DC_FAIL_BANDWIDTH_VALIDATE;

	return result;
}

static void patch_gamut_packet_checksum(
		struct dc_info_packet *gamut_packet)
{
	/* For gamut we recalc checksum */
	if (gamut_packet->valid) {
		uint8_t chk_sum = 0;
		uint8_t *ptr;
		uint8_t i;

		/*start of the Gamut data. */
		ptr = &gamut_packet->sb[3];

		for (i = 0; i <= gamut_packet->sb[1]; i++)
			chk_sum += ptr[i];

		gamut_packet->sb[2] = (uint8_t) (0x100 - chk_sum);
	}
}

static void set_avi_info_frame(
		struct dc_info_packet *info_packet,
		struct pipe_ctx *pipe_ctx)
{
	struct dc_stream_state *stream = pipe_ctx->stream;
	enum dc_color_space color_space = COLOR_SPACE_UNKNOWN;
	uint32_t pixel_encoding = 0;
	enum scanning_type scan_type = SCANNING_TYPE_NODATA;
	enum dc_aspect_ratio aspect = ASPECT_RATIO_NO_DATA;
	bool itc = false;
	uint8_t itc_value = 0;
	uint8_t cn0_cn1 = 0;
	unsigned int cn0_cn1_value = 0;
	uint8_t *check_sum = NULL;
	uint8_t byte_index = 0;
	union hdmi_info_packet hdmi_info;
	union display_content_support support = {0};
	unsigned int vic = pipe_ctx->stream->timing.vic;
	enum dc_timing_3d_format format;

	memset(&hdmi_info, 0, sizeof(union hdmi_info_packet));

	color_space = pipe_ctx->stream->output_color_space;
	if (color_space == COLOR_SPACE_UNKNOWN)
		color_space = (stream->timing.pixel_encoding == PIXEL_ENCODING_RGB) ?
			COLOR_SPACE_SRGB:COLOR_SPACE_YCBCR709;

	/* Initialize header */
	hdmi_info.bits.header.info_frame_type = HDMI_INFOFRAME_TYPE_AVI;
	/* InfoFrameVersion_3 is defined by CEA861F (Section 6.4), but shall
	* not be used in HDMI 2.0 (Section 10.1) */
	hdmi_info.bits.header.version = 2;
	hdmi_info.bits.header.length = HDMI_AVI_INFOFRAME_SIZE;

	/*
	 * IDO-defined (Y2,Y1,Y0 = 1,1,1) shall not be used by devices built
	 * according to HDMI 2.0 spec (Section 10.1)
	 */

	switch (stream->timing.pixel_encoding) {
	case PIXEL_ENCODING_YCBCR422:
		pixel_encoding = 1;
		break;

	case PIXEL_ENCODING_YCBCR444:
		pixel_encoding = 2;
		break;
	case PIXEL_ENCODING_YCBCR420:
		pixel_encoding = 3;
		break;

	case PIXEL_ENCODING_RGB:
	default:
		pixel_encoding = 0;
	}

	/* Y0_Y1_Y2 : The pixel encoding */
	/* H14b AVI InfoFrame has extension on Y-field from 2 bits to 3 bits */
	hdmi_info.bits.Y0_Y1_Y2 = pixel_encoding;

	/* A0 = 1 Active Format Information valid */
	hdmi_info.bits.A0 = ACTIVE_FORMAT_VALID;

	/* B0, B1 = 3; Bar info data is valid */
	hdmi_info.bits.B0_B1 = BAR_INFO_BOTH_VALID;

	hdmi_info.bits.SC0_SC1 = PICTURE_SCALING_UNIFORM;

	/* S0, S1 : Underscan / Overscan */
	/* TODO: un-hardcode scan type */
	scan_type = SCANNING_TYPE_UNDERSCAN;
	hdmi_info.bits.S0_S1 = scan_type;

	/* C0, C1 : Colorimetry */
	if (color_space == COLOR_SPACE_YCBCR709 ||
			color_space == COLOR_SPACE_YCBCR709_LIMITED)
		hdmi_info.bits.C0_C1 = COLORIMETRY_ITU709;
	else if (color_space == COLOR_SPACE_YCBCR601 ||
			color_space == COLOR_SPACE_YCBCR601_LIMITED)
		hdmi_info.bits.C0_C1 = COLORIMETRY_ITU601;
	else {
		hdmi_info.bits.C0_C1 = COLORIMETRY_NO_DATA;
	}
	if (color_space == COLOR_SPACE_2020_RGB_FULLRANGE ||
			color_space == COLOR_SPACE_2020_RGB_LIMITEDRANGE ||
			color_space == COLOR_SPACE_2020_YCBCR) {
		hdmi_info.bits.EC0_EC2 = COLORIMETRYEX_BT2020RGBYCBCR;
		hdmi_info.bits.C0_C1   = COLORIMETRY_EXTENDED;
	} else if (color_space == COLOR_SPACE_ADOBERGB) {
		hdmi_info.bits.EC0_EC2 = COLORIMETRYEX_ADOBERGB;
		hdmi_info.bits.C0_C1   = COLORIMETRY_EXTENDED;
	}

	/* TODO: un-hardcode aspect ratio */
	aspect = stream->timing.aspect_ratio;

	switch (aspect) {
	case ASPECT_RATIO_4_3:
	case ASPECT_RATIO_16_9:
		hdmi_info.bits.M0_M1 = aspect;
		break;

	case ASPECT_RATIO_NO_DATA:
	case ASPECT_RATIO_64_27:
	case ASPECT_RATIO_256_135:
	default:
		hdmi_info.bits.M0_M1 = 0;
	}

	/* Active Format Aspect ratio - same as Picture Aspect Ratio. */
	hdmi_info.bits.R0_R3 = ACTIVE_FORMAT_ASPECT_RATIO_SAME_AS_PICTURE;

	/* TODO: un-hardcode cn0_cn1 and itc */

	cn0_cn1 = 0;
	cn0_cn1_value = 0;

	itc = true;
	itc_value = 1;

	support = stream->content_support;

	if (itc) {
		if (!support.bits.valid_content_type) {
			cn0_cn1_value = 0;
		} else {
			if (cn0_cn1 == DISPLAY_CONTENT_TYPE_GRAPHICS) {
				if (support.bits.graphics_content == 1) {
					cn0_cn1_value = 0;
				}
			} else if (cn0_cn1 == DISPLAY_CONTENT_TYPE_PHOTO) {
				if (support.bits.photo_content == 1) {
					cn0_cn1_value = 1;
				} else {
					cn0_cn1_value = 0;
					itc_value = 0;
				}
			} else if (cn0_cn1 == DISPLAY_CONTENT_TYPE_CINEMA) {
				if (support.bits.cinema_content == 1) {
					cn0_cn1_value = 2;
				} else {
					cn0_cn1_value = 0;
					itc_value = 0;
				}
			} else if (cn0_cn1 == DISPLAY_CONTENT_TYPE_GAME) {
				if (support.bits.game_content == 1) {
					cn0_cn1_value = 3;
				} else {
					cn0_cn1_value = 0;
					itc_value = 0;
				}
			}
		}
		hdmi_info.bits.CN0_CN1 = cn0_cn1_value;
		hdmi_info.bits.ITC = itc_value;
	}

	if (stream->qs_bit == 1) {
		if (color_space == COLOR_SPACE_SRGB ||
			color_space == COLOR_SPACE_2020_RGB_FULLRANGE)
			hdmi_info.bits.Q0_Q1   = RGB_QUANTIZATION_FULL_RANGE;
		else if (color_space == COLOR_SPACE_SRGB_LIMITED ||
					color_space == COLOR_SPACE_2020_RGB_LIMITEDRANGE)
			hdmi_info.bits.Q0_Q1   = RGB_QUANTIZATION_LIMITED_RANGE;
		else
			hdmi_info.bits.Q0_Q1   = RGB_QUANTIZATION_DEFAULT_RANGE;
	} else
		hdmi_info.bits.Q0_Q1   = RGB_QUANTIZATION_DEFAULT_RANGE;

	/* TODO : We should handle YCC quantization */
	/* but we do not have matrix calculation */
	if (stream->qy_bit == 1) {
		if (color_space == COLOR_SPACE_SRGB ||
			color_space == COLOR_SPACE_2020_RGB_FULLRANGE)
			hdmi_info.bits.YQ0_YQ1 = YYC_QUANTIZATION_LIMITED_RANGE;
		else if (color_space == COLOR_SPACE_SRGB_LIMITED ||
					color_space == COLOR_SPACE_2020_RGB_LIMITEDRANGE)
			hdmi_info.bits.YQ0_YQ1 = YYC_QUANTIZATION_LIMITED_RANGE;
		else
			hdmi_info.bits.YQ0_YQ1 = YYC_QUANTIZATION_LIMITED_RANGE;
	} else
		hdmi_info.bits.YQ0_YQ1 = YYC_QUANTIZATION_LIMITED_RANGE;

	///VIC
	format = stream->timing.timing_3d_format;
	/*todo, add 3DStereo support*/
	if (format != TIMING_3D_FORMAT_NONE) {
		// Based on HDMI specs hdmi vic needs to be converted to cea vic when 3D is enabled
		switch (pipe_ctx->stream->timing.hdmi_vic) {
		case 1:
			vic = 95;
			break;
		case 2:
			vic = 94;
			break;
		case 3:
			vic = 93;
			break;
		case 4:
			vic = 98;
			break;
		default:
			break;
		}
	}
	/* If VIC >= 128, the Source shall use AVI InfoFrame Version 3*/
	hdmi_info.bits.VIC0_VIC7 = vic;
	if (vic >= 128)
		hdmi_info.bits.header.version = 3;
	/* If (C1, C0)=(1, 1) and (EC2, EC1, EC0)=(1, 1, 1),
	 * the Source shall use 20 AVI InfoFrame Version 4
	 */
	if (hdmi_info.bits.C0_C1 == COLORIMETRY_EXTENDED &&
			hdmi_info.bits.EC0_EC2 == COLORIMETRYEX_RESERVED) {
		hdmi_info.bits.header.version = 4;
		hdmi_info.bits.header.length = 14;
	}

	/* pixel repetition
	 * PR0 - PR3 start from 0 whereas pHwPathMode->mode.timing.flags.pixel
	 * repetition start from 1 */
	hdmi_info.bits.PR0_PR3 = 0;

	/* Bar Info
	 * barTop:    Line Number of End of Top Bar.
	 * barBottom: Line Number of Start of Bottom Bar.
	 * barLeft:   Pixel Number of End of Left Bar.
	 * barRight:  Pixel Number of Start of Right Bar. */
	hdmi_info.bits.bar_top = stream->timing.v_border_top;
	hdmi_info.bits.bar_bottom = (stream->timing.v_total
			- stream->timing.v_border_bottom + 1);
	hdmi_info.bits.bar_left  = stream->timing.h_border_left;
	hdmi_info.bits.bar_right = (stream->timing.h_total
			- stream->timing.h_border_right + 1);

    /* Additional Colorimetry Extension
     * Used in conduction with C0-C1 and EC0-EC2
     * 0 = DCI-P3 RGB (D65)
     * 1 = DCI-P3 RGB (theater)
     */
	hdmi_info.bits.ACE0_ACE3 = 0;

	/* check_sum - Calculate AFMT_AVI_INFO0 ~ AFMT_AVI_INFO3 */
	check_sum = &hdmi_info.packet_raw_data.sb[0];

	*check_sum = HDMI_INFOFRAME_TYPE_AVI + hdmi_info.bits.header.length + hdmi_info.bits.header.version;

	for (byte_index = 1; byte_index <= hdmi_info.bits.header.length; byte_index++)
		*check_sum += hdmi_info.packet_raw_data.sb[byte_index];

	/* one byte complement */
	*check_sum = (uint8_t) (0x100 - *check_sum);

	/* Store in hw_path_mode */
	info_packet->hb0 = hdmi_info.packet_raw_data.hb0;
	info_packet->hb1 = hdmi_info.packet_raw_data.hb1;
	info_packet->hb2 = hdmi_info.packet_raw_data.hb2;

	for (byte_index = 0; byte_index < sizeof(hdmi_info.packet_raw_data.sb); byte_index++)
		info_packet->sb[byte_index] = hdmi_info.packet_raw_data.sb[byte_index];

	info_packet->valid = true;
}

static void set_vendor_info_packet(
		struct dc_info_packet *info_packet,
		struct dc_stream_state *stream)
{
	/* SPD info packet for FreeSync */

	/* Check if Freesync is supported. Return if false. If true,
	 * set the corresponding bit in the info packet
	 */
	if (!stream->vsp_infopacket.valid)
		return;

	*info_packet = stream->vsp_infopacket;
}

static void set_spd_info_packet(
		struct dc_info_packet *info_packet,
		struct dc_stream_state *stream)
{
	/* SPD info packet for FreeSync */

	/* Check if Freesync is supported. Return if false. If true,
	 * set the corresponding bit in the info packet
	 */
	if (!stream->vrr_infopacket.valid)
		return;

	*info_packet = stream->vrr_infopacket;
}

static void set_hdr_static_info_packet(
		struct dc_info_packet *info_packet,
		struct dc_stream_state *stream)
{
	/* HDR Static Metadata info packet for HDR10 */

	if (!stream->hdr_static_metadata.valid ||
			stream->use_dynamic_meta)
		return;

	*info_packet = stream->hdr_static_metadata;
}

static void set_vsc_info_packet(
		struct dc_info_packet *info_packet,
		struct dc_stream_state *stream)
{
	if (!stream->vsc_infopacket.valid)
		return;

	*info_packet = stream->vsc_infopacket;
}

void dc_resource_state_destruct(struct dc_state *context)
{
	int i, j;

	for (i = 0; i < context->stream_count; i++) {
		for (j = 0; j < context->stream_status[i].plane_count; j++)
			dc_plane_state_release(
				context->stream_status[i].plane_states[j]);

		context->stream_status[i].plane_count = 0;
		dc_stream_release(context->streams[i]);
		context->streams[i] = NULL;
	}
	context->stream_count = 0;
}

void dc_resource_state_copy_construct(
		const struct dc_state *src_ctx,
		struct dc_state *dst_ctx)
{
	int i, j;
	struct kref refcount = dst_ctx->refcount;

	*dst_ctx = *src_ctx;

	for (i = 0; i < MAX_PIPES; i++) {
		struct pipe_ctx *cur_pipe = &dst_ctx->res_ctx.pipe_ctx[i];

		if (cur_pipe->top_pipe)
			cur_pipe->top_pipe =  &dst_ctx->res_ctx.pipe_ctx[cur_pipe->top_pipe->pipe_idx];

		if (cur_pipe->bottom_pipe)
			cur_pipe->bottom_pipe = &dst_ctx->res_ctx.pipe_ctx[cur_pipe->bottom_pipe->pipe_idx];

		if (cur_pipe->next_odm_pipe)
			cur_pipe->next_odm_pipe =  &dst_ctx->res_ctx.pipe_ctx[cur_pipe->next_odm_pipe->pipe_idx];

		if (cur_pipe->prev_odm_pipe)
			cur_pipe->prev_odm_pipe = &dst_ctx->res_ctx.pipe_ctx[cur_pipe->prev_odm_pipe->pipe_idx];
	}

	for (i = 0; i < dst_ctx->stream_count; i++) {
		dc_stream_retain(dst_ctx->streams[i]);
		for (j = 0; j < dst_ctx->stream_status[i].plane_count; j++)
			dc_plane_state_retain(
				dst_ctx->stream_status[i].plane_states[j]);
	}

	/* context refcount should not be overridden */
	dst_ctx->refcount = refcount;

}

struct clock_source *dc_resource_find_first_free_pll(
		struct resource_context *res_ctx,
		const struct resource_pool *pool)
{
	int i;

	for (i = 0; i < pool->clk_src_count; ++i) {
		if (res_ctx->clock_source_ref_count[i] == 0)
			return pool->clock_sources[i];
	}

	return NULL;
}

void resource_build_info_frame(struct pipe_ctx *pipe_ctx)
{
	enum signal_type signal = SIGNAL_TYPE_NONE;
	struct encoder_info_frame *info = &pipe_ctx->stream_res.encoder_info_frame;

	/* default all packets to invalid */
	info->avi.valid = false;
	info->gamut.valid = false;
	info->vendor.valid = false;
	info->spd.valid = false;
	info->hdrsmd.valid = false;
	info->vsc.valid = false;

	signal = pipe_ctx->stream->signal;

	/* HDMi and DP have different info packets*/
	if (dc_is_hdmi_signal(signal)) {
		set_avi_info_frame(&info->avi, pipe_ctx);

		set_vendor_info_packet(&info->vendor, pipe_ctx->stream);

		set_spd_info_packet(&info->spd, pipe_ctx->stream);

		set_hdr_static_info_packet(&info->hdrsmd, pipe_ctx->stream);

	} else if (dc_is_dp_signal(signal)) {
		set_vsc_info_packet(&info->vsc, pipe_ctx->stream);

		set_spd_info_packet(&info->spd, pipe_ctx->stream);

		set_hdr_static_info_packet(&info->hdrsmd, pipe_ctx->stream);
	}

	patch_gamut_packet_checksum(&info->gamut);
}

enum dc_status resource_map_clock_resources(
		const struct dc  *dc,
		struct dc_state *context,
		struct dc_stream_state *stream)
{
	/* acquire new resources */
	const struct resource_pool *pool = dc->res_pool;
	struct pipe_ctx *pipe_ctx = resource_get_head_pipe_for_stream(
				&context->res_ctx, stream);

	if (!pipe_ctx)
		return DC_ERROR_UNEXPECTED;

	if (dc_is_dp_signal(pipe_ctx->stream->signal)
		|| pipe_ctx->stream->signal == SIGNAL_TYPE_VIRTUAL)
		pipe_ctx->clock_source = pool->dp_clock_source;
	else {
		pipe_ctx->clock_source = NULL;

		if (!dc->config.disable_disp_pll_sharing)
			pipe_ctx->clock_source = resource_find_used_clk_src_for_sharing(
				&context->res_ctx,
				pipe_ctx);

		if (pipe_ctx->clock_source == NULL)
			pipe_ctx->clock_source =
				dc_resource_find_first_free_pll(
					&context->res_ctx,
					pool);
	}

	if (pipe_ctx->clock_source == NULL)
		return DC_NO_CLOCK_SOURCE_RESOURCE;

	resource_reference_clock_source(
		&context->res_ctx, pool,
		pipe_ctx->clock_source);

	return DC_OK;
}

/*
 * Note: We need to disable output if clock sources change,
 * since bios does optimization and doesn't apply if changing
 * PHY when not already disabled.
 */
bool pipe_need_reprogram(
		struct pipe_ctx *pipe_ctx_old,
		struct pipe_ctx *pipe_ctx)
{
	if (!pipe_ctx_old->stream)
		return false;

	if (pipe_ctx_old->stream->sink != pipe_ctx->stream->sink)
		return true;

	if (pipe_ctx_old->stream->signal != pipe_ctx->stream->signal)
		return true;

	if (pipe_ctx_old->stream_res.audio != pipe_ctx->stream_res.audio)
		return true;

	if (pipe_ctx_old->clock_source != pipe_ctx->clock_source
			&& pipe_ctx_old->stream != pipe_ctx->stream)
		return true;

	if (pipe_ctx_old->stream_res.stream_enc != pipe_ctx->stream_res.stream_enc)
		return true;

	if (is_timing_changed(pipe_ctx_old->stream, pipe_ctx->stream))
		return true;

	if (pipe_ctx_old->stream->dpms_off != pipe_ctx->stream->dpms_off)
		return true;

	if (false == pipe_ctx_old->stream->link->link_state_valid &&
		false == pipe_ctx_old->stream->dpms_off)
		return true;

	if (pipe_ctx_old->stream_res.dsc != pipe_ctx->stream_res.dsc)
		return true;

#if defined(CONFIG_DRM_AMD_DC_DCN)
	if (pipe_ctx_old->stream_res.hpo_dp_stream_enc != pipe_ctx->stream_res.hpo_dp_stream_enc)
		return true;
#endif

	/* DIG link encoder resource assignment for stream changed. */
	if (pipe_ctx_old->stream->ctx->dc->res_pool->funcs->link_encs_assign) {
		bool need_reprogram = false;
		struct dc *dc = pipe_ctx_old->stream->ctx->dc;
		enum link_enc_cfg_mode mode = dc->current_state->res_ctx.link_enc_cfg_ctx.mode;

		dc->current_state->res_ctx.link_enc_cfg_ctx.mode = LINK_ENC_CFG_STEADY;
		if (link_enc_cfg_get_link_enc_used_by_stream(dc, pipe_ctx_old->stream) != pipe_ctx->stream->link_enc)
			need_reprogram = true;
		dc->current_state->res_ctx.link_enc_cfg_ctx.mode = mode;

		return need_reprogram;
	}

	return false;
}

void resource_build_bit_depth_reduction_params(struct dc_stream_state *stream,
		struct bit_depth_reduction_params *fmt_bit_depth)
{
	enum dc_dither_option option = stream->dither_option;
	enum dc_pixel_encoding pixel_encoding =
			stream->timing.pixel_encoding;

	memset(fmt_bit_depth, 0, sizeof(*fmt_bit_depth));

	if (option == DITHER_OPTION_DEFAULT) {
		switch (stream->timing.display_color_depth) {
		case COLOR_DEPTH_666:
			option = DITHER_OPTION_SPATIAL6;
			break;
		case COLOR_DEPTH_888:
			option = DITHER_OPTION_SPATIAL8;
			break;
		case COLOR_DEPTH_101010:
			option = DITHER_OPTION_SPATIAL10;
			break;
		default:
			option = DITHER_OPTION_DISABLE;
		}
	}

	if (option == DITHER_OPTION_DISABLE)
		return;

	if (option == DITHER_OPTION_TRUN6) {
		fmt_bit_depth->flags.TRUNCATE_ENABLED = 1;
		fmt_bit_depth->flags.TRUNCATE_DEPTH = 0;
	} else if (option == DITHER_OPTION_TRUN8 ||
			option == DITHER_OPTION_TRUN8_SPATIAL6 ||
			option == DITHER_OPTION_TRUN8_FM6) {
		fmt_bit_depth->flags.TRUNCATE_ENABLED = 1;
		fmt_bit_depth->flags.TRUNCATE_DEPTH = 1;
	} else if (option == DITHER_OPTION_TRUN10        ||
			option == DITHER_OPTION_TRUN10_SPATIAL6   ||
			option == DITHER_OPTION_TRUN10_SPATIAL8   ||
			option == DITHER_OPTION_TRUN10_FM8     ||
			option == DITHER_OPTION_TRUN10_FM6     ||
			option == DITHER_OPTION_TRUN10_SPATIAL8_FM6) {
		fmt_bit_depth->flags.TRUNCATE_ENABLED = 1;
		fmt_bit_depth->flags.TRUNCATE_DEPTH = 2;
	}

	/* special case - Formatter can only reduce by 4 bits at most.
	 * When reducing from 12 to 6 bits,
	 * HW recommends we use trunc with round mode
	 * (if we did nothing, trunc to 10 bits would be used)
	 * note that any 12->10 bit reduction is ignored prior to DCE8,
	 * as the input was 10 bits.
	 */
	if (option == DITHER_OPTION_SPATIAL6_FRAME_RANDOM ||
			option == DITHER_OPTION_SPATIAL6 ||
			option == DITHER_OPTION_FM6) {
		fmt_bit_depth->flags.TRUNCATE_ENABLED = 1;
		fmt_bit_depth->flags.TRUNCATE_DEPTH = 2;
		fmt_bit_depth->flags.TRUNCATE_MODE = 1;
	}

	/* spatial dither
	 * note that spatial modes 1-3 are never used
	 */
	if (option == DITHER_OPTION_SPATIAL6_FRAME_RANDOM            ||
			option == DITHER_OPTION_SPATIAL6 ||
			option == DITHER_OPTION_TRUN10_SPATIAL6      ||
			option == DITHER_OPTION_TRUN8_SPATIAL6) {
		fmt_bit_depth->flags.SPATIAL_DITHER_ENABLED = 1;
		fmt_bit_depth->flags.SPATIAL_DITHER_DEPTH = 0;
		fmt_bit_depth->flags.HIGHPASS_RANDOM = 1;
		fmt_bit_depth->flags.RGB_RANDOM =
				(pixel_encoding == PIXEL_ENCODING_RGB) ? 1 : 0;
	} else if (option == DITHER_OPTION_SPATIAL8_FRAME_RANDOM            ||
			option == DITHER_OPTION_SPATIAL8 ||
			option == DITHER_OPTION_SPATIAL8_FM6        ||
			option == DITHER_OPTION_TRUN10_SPATIAL8      ||
			option == DITHER_OPTION_TRUN10_SPATIAL8_FM6) {
		fmt_bit_depth->flags.SPATIAL_DITHER_ENABLED = 1;
		fmt_bit_depth->flags.SPATIAL_DITHER_DEPTH = 1;
		fmt_bit_depth->flags.HIGHPASS_RANDOM = 1;
		fmt_bit_depth->flags.RGB_RANDOM =
				(pixel_encoding == PIXEL_ENCODING_RGB) ? 1 : 0;
	} else if (option == DITHER_OPTION_SPATIAL10_FRAME_RANDOM ||
			option == DITHER_OPTION_SPATIAL10 ||
			option == DITHER_OPTION_SPATIAL10_FM8 ||
			option == DITHER_OPTION_SPATIAL10_FM6) {
		fmt_bit_depth->flags.SPATIAL_DITHER_ENABLED = 1;
		fmt_bit_depth->flags.SPATIAL_DITHER_DEPTH = 2;
		fmt_bit_depth->flags.HIGHPASS_RANDOM = 1;
		fmt_bit_depth->flags.RGB_RANDOM =
				(pixel_encoding == PIXEL_ENCODING_RGB) ? 1 : 0;
	}

	if (option == DITHER_OPTION_SPATIAL6 ||
			option == DITHER_OPTION_SPATIAL8 ||
			option == DITHER_OPTION_SPATIAL10) {
		fmt_bit_depth->flags.FRAME_RANDOM = 0;
	} else {
		fmt_bit_depth->flags.FRAME_RANDOM = 1;
	}

	//////////////////////
	//// temporal dither
	//////////////////////
	if (option == DITHER_OPTION_FM6           ||
			option == DITHER_OPTION_SPATIAL8_FM6     ||
			option == DITHER_OPTION_SPATIAL10_FM6     ||
			option == DITHER_OPTION_TRUN10_FM6     ||
			option == DITHER_OPTION_TRUN8_FM6      ||
			option == DITHER_OPTION_TRUN10_SPATIAL8_FM6) {
		fmt_bit_depth->flags.FRAME_MODULATION_ENABLED = 1;
		fmt_bit_depth->flags.FRAME_MODULATION_DEPTH = 0;
	} else if (option == DITHER_OPTION_FM8        ||
			option == DITHER_OPTION_SPATIAL10_FM8  ||
			option == DITHER_OPTION_TRUN10_FM8) {
		fmt_bit_depth->flags.FRAME_MODULATION_ENABLED = 1;
		fmt_bit_depth->flags.FRAME_MODULATION_DEPTH = 1;
	} else if (option == DITHER_OPTION_FM10) {
		fmt_bit_depth->flags.FRAME_MODULATION_ENABLED = 1;
		fmt_bit_depth->flags.FRAME_MODULATION_DEPTH = 2;
	}

	fmt_bit_depth->pixel_encoding = pixel_encoding;
}

enum dc_status dc_validate_stream(struct dc *dc, struct dc_stream_state *stream)
{
	struct dc_link *link = stream->link;
	struct timing_generator *tg = dc->res_pool->timing_generators[0];
	enum dc_status res = DC_OK;

	calculate_phy_pix_clks(stream);

	if (!tg->funcs->validate_timing(tg, &stream->timing))
		res = DC_FAIL_CONTROLLER_VALIDATE;

	if (res == DC_OK) {
		if (link->ep_type == DISPLAY_ENDPOINT_PHY &&
				!link->link_enc->funcs->validate_output_with_stream(
						link->link_enc, stream))
			res = DC_FAIL_ENC_VALIDATE;
	}

	/* TODO: validate audio ASIC caps, encoder */

	if (res == DC_OK)
		res = dc_link_validate_mode_timing(stream,
		      link,
		      &stream->timing);

	return res;
}

enum dc_status dc_validate_plane(struct dc *dc, const struct dc_plane_state *plane_state)
{
	enum dc_status res = DC_OK;

	/* TODO For now validates pixel format only */
	if (dc->res_pool->funcs->validate_plane)
		return dc->res_pool->funcs->validate_plane(plane_state, &dc->caps);

	return res;
}

unsigned int resource_pixel_format_to_bpp(enum surface_pixel_format format)
{
	switch (format) {
	case SURFACE_PIXEL_FORMAT_GRPH_PALETA_256_COLORS:
		return 8;
	case SURFACE_PIXEL_FORMAT_VIDEO_420_YCbCr:
	case SURFACE_PIXEL_FORMAT_VIDEO_420_YCrCb:
		return 12;
	case SURFACE_PIXEL_FORMAT_GRPH_ARGB1555:
	case SURFACE_PIXEL_FORMAT_GRPH_RGB565:
	case SURFACE_PIXEL_FORMAT_VIDEO_420_10bpc_YCbCr:
	case SURFACE_PIXEL_FORMAT_VIDEO_420_10bpc_YCrCb:
		return 16;
	case SURFACE_PIXEL_FORMAT_GRPH_ARGB8888:
	case SURFACE_PIXEL_FORMAT_GRPH_ABGR8888:
	case SURFACE_PIXEL_FORMAT_GRPH_ARGB2101010:
	case SURFACE_PIXEL_FORMAT_GRPH_ABGR2101010:
	case SURFACE_PIXEL_FORMAT_GRPH_ABGR2101010_XR_BIAS:
#if defined(CONFIG_DRM_AMD_DC_DCN)
	case SURFACE_PIXEL_FORMAT_GRPH_RGBE:
	case SURFACE_PIXEL_FORMAT_GRPH_RGBE_ALPHA:
#endif
		return 32;
	case SURFACE_PIXEL_FORMAT_GRPH_ARGB16161616:
	case SURFACE_PIXEL_FORMAT_GRPH_ABGR16161616:
	case SURFACE_PIXEL_FORMAT_GRPH_ARGB16161616F:
	case SURFACE_PIXEL_FORMAT_GRPH_ABGR16161616F:
		return 64;
	default:
		ASSERT_CRITICAL(false);
		return -1;
	}
}
static unsigned int get_max_audio_sample_rate(struct audio_mode *modes)
{
	if (modes) {
		if (modes->sample_rates.rate.RATE_192)
			return 192000;
		if (modes->sample_rates.rate.RATE_176_4)
			return 176400;
		if (modes->sample_rates.rate.RATE_96)
			return 96000;
		if (modes->sample_rates.rate.RATE_88_2)
			return 88200;
		if (modes->sample_rates.rate.RATE_48)
			return 48000;
		if (modes->sample_rates.rate.RATE_44_1)
			return 44100;
		if (modes->sample_rates.rate.RATE_32)
			return 32000;
	}
	/*original logic when no audio info*/
	return 441000;
}

void get_audio_check(struct audio_info *aud_modes,
	struct audio_check *audio_chk)
{
	unsigned int i;
	unsigned int max_sample_rate = 0;

	if (aud_modes) {
		audio_chk->audio_packet_type = 0x2;/*audio sample packet AP = .25 for layout0, 1 for layout1*/

		audio_chk->max_audiosample_rate = 0;
		for (i = 0; i < aud_modes->mode_count; i++) {
			max_sample_rate = get_max_audio_sample_rate(&aud_modes->modes[i]);
			if (audio_chk->max_audiosample_rate < max_sample_rate)
				audio_chk->max_audiosample_rate = max_sample_rate;
			/*dts takes the same as type 2: AP = 0.25*/
		}
		/*check which one take more bandwidth*/
		if (audio_chk->max_audiosample_rate > 192000)
			audio_chk->audio_packet_type = 0x9;/*AP =1*/
		audio_chk->acat = 0;/*not support*/
	}
}

#if defined(CONFIG_DRM_AMD_DC_DCN)
struct hpo_dp_link_encoder *resource_get_unused_hpo_dp_link_encoder(
		const struct resource_pool *pool)
{
	uint8_t i;
	struct hpo_dp_link_encoder *enc = NULL;

	ASSERT(pool->hpo_dp_link_enc_count <= MAX_HPO_DP2_LINK_ENCODERS);

	for (i = 0; i < pool->hpo_dp_link_enc_count; i++) {
		if (pool->hpo_dp_link_enc[i]->transmitter == TRANSMITTER_UNKNOWN) {
			enc = pool->hpo_dp_link_enc[i];
			break;
		}
	}

	return enc;
}
#endif