1 /*
2  * Copyright 2016 Advanced Micro Devices, Inc.
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8  * and/or sell copies of the Software, and to permit persons to whom the
9  * Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice shall be included in
12  * all copies or substantial portions of the Software.
13  *
14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20  * OTHER DEALINGS IN THE SOFTWARE.
21  *
22  * Authors: AMD
23  *
24  */
25 
26 
27 #include "dm_services.h"
28 #include "dm_helpers.h"
29 #include "core_types.h"
30 #include "resource.h"
31 #include "dccg.h"
32 #include "dce/dce_hwseq.h"
33 #include "clk_mgr.h"
34 #include "reg_helper.h"
35 #include "abm.h"
36 #include "hubp.h"
37 #include "dchubbub.h"
38 #include "timing_generator.h"
39 #include "opp.h"
40 #include "ipp.h"
41 #include "mpc.h"
42 #include "mcif_wb.h"
43 #include "dc_dmub_srv.h"
44 #include "dcn31_hwseq.h"
45 #include "link_hwss.h"
46 #include "dpcd_defs.h"
47 #include "dce/dmub_outbox.h"
48 #include "dc_link_dp.h"
49 #include "inc/link_dpcd.h"
50 #include "dcn10/dcn10_hw_sequencer.h"
51 #include "inc/link_enc_cfg.h"
52 #include "dcn30/dcn30_vpg.h"
53 #include "dce/dce_i2c_hw.h"
54 
55 #define DC_LOGGER_INIT(logger)
56 
57 #define CTX \
58 	hws->ctx
59 #define REG(reg)\
60 	hws->regs->reg
61 #define DC_LOGGER \
62 		dc->ctx->logger
63 
64 
65 #undef FN
66 #define FN(reg_name, field_name) \
67 	hws->shifts->field_name, hws->masks->field_name
68 
69 static void enable_memory_low_power(struct dc *dc)
70 {
71 	struct dce_hwseq *hws = dc->hwseq;
72 	int i;
73 
74 	if (dc->debug.enable_mem_low_power.bits.dmcu) {
75 		// Force ERAM to shutdown if DMCU is not enabled
76 		if (dc->debug.disable_dmcu || dc->config.disable_dmcu) {
77 			REG_UPDATE(DMU_MEM_PWR_CNTL, DMCU_ERAM_MEM_PWR_FORCE, 3);
78 		}
79 	}
80 
81 	// Set default OPTC memory power states
82 	if (dc->debug.enable_mem_low_power.bits.optc) {
83 		// Shutdown when unassigned and light sleep in VBLANK
84 		REG_SET_2(ODM_MEM_PWR_CTRL3, 0, ODM_MEM_UNASSIGNED_PWR_MODE, 3, ODM_MEM_VBLANK_PWR_MODE, 1);
85 	}
86 
87 	if (dc->debug.enable_mem_low_power.bits.vga) {
88 		// Power down VGA memory
89 		REG_UPDATE(MMHUBBUB_MEM_PWR_CNTL, VGA_MEM_PWR_FORCE, 1);
90 	}
91 
92 	if (dc->debug.enable_mem_low_power.bits.mpc)
93 		dc->res_pool->mpc->funcs->set_mpc_mem_lp_mode(dc->res_pool->mpc);
94 
95 
96 	if (dc->debug.enable_mem_low_power.bits.vpg && dc->res_pool->stream_enc[0]->vpg->funcs->vpg_powerdown) {
97 		// Power down VPGs
98 		for (i = 0; i < dc->res_pool->stream_enc_count; i++)
99 			dc->res_pool->stream_enc[i]->vpg->funcs->vpg_powerdown(dc->res_pool->stream_enc[i]->vpg);
100 #if defined(CONFIG_DRM_AMD_DC_DCN)
101 		for (i = 0; i < dc->res_pool->hpo_dp_stream_enc_count; i++)
102 			dc->res_pool->hpo_dp_stream_enc[i]->vpg->funcs->vpg_powerdown(dc->res_pool->hpo_dp_stream_enc[i]->vpg);
103 #endif
104 	}
105 
106 }
107 
108 void dcn31_init_hw(struct dc *dc)
109 {
110 	struct abm **abms = dc->res_pool->multiple_abms;
111 	struct dce_hwseq *hws = dc->hwseq;
112 	struct dc_bios *dcb = dc->ctx->dc_bios;
113 	struct resource_pool *res_pool = dc->res_pool;
114 	uint32_t backlight = MAX_BACKLIGHT_LEVEL;
115 	int i;
116 
117 	if (dc->clk_mgr && dc->clk_mgr->funcs->init_clocks)
118 		dc->clk_mgr->funcs->init_clocks(dc->clk_mgr);
119 
120 	if (IS_FPGA_MAXIMUS_DC(dc->ctx->dce_environment)) {
121 
122 		REG_WRITE(REFCLK_CNTL, 0);
123 		REG_UPDATE(DCHUBBUB_GLOBAL_TIMER_CNTL, DCHUBBUB_GLOBAL_TIMER_ENABLE, 1);
124 		REG_WRITE(DIO_MEM_PWR_CTRL, 0);
125 
126 		if (!dc->debug.disable_clock_gate) {
127 			/* enable all DCN clock gating */
128 			REG_WRITE(DCCG_GATE_DISABLE_CNTL, 0);
129 
130 			REG_WRITE(DCCG_GATE_DISABLE_CNTL2, 0);
131 
132 			REG_UPDATE(DCFCLK_CNTL, DCFCLK_GATE_DIS, 0);
133 		}
134 
135 		//Enable ability to power gate / don't force power on permanently
136 		if (hws->funcs.enable_power_gating_plane)
137 			hws->funcs.enable_power_gating_plane(hws, true);
138 
139 		return;
140 	}
141 
142 	if (!dcb->funcs->is_accelerated_mode(dcb)) {
143 		hws->funcs.bios_golden_init(dc);
144 		hws->funcs.disable_vga(dc->hwseq);
145 	}
146 	// Initialize the dccg
147 	if (res_pool->dccg->funcs->dccg_init)
148 		res_pool->dccg->funcs->dccg_init(res_pool->dccg);
149 
150 	enable_memory_low_power(dc);
151 
152 	if (dc->ctx->dc_bios->fw_info_valid) {
153 		res_pool->ref_clocks.xtalin_clock_inKhz =
154 				dc->ctx->dc_bios->fw_info.pll_info.crystal_frequency;
155 
156 		if (!IS_FPGA_MAXIMUS_DC(dc->ctx->dce_environment)) {
157 			if (res_pool->dccg && res_pool->hubbub) {
158 
159 				(res_pool->dccg->funcs->get_dccg_ref_freq)(res_pool->dccg,
160 						dc->ctx->dc_bios->fw_info.pll_info.crystal_frequency,
161 						&res_pool->ref_clocks.dccg_ref_clock_inKhz);
162 
163 				(res_pool->hubbub->funcs->get_dchub_ref_freq)(res_pool->hubbub,
164 						res_pool->ref_clocks.dccg_ref_clock_inKhz,
165 						&res_pool->ref_clocks.dchub_ref_clock_inKhz);
166 			} else {
167 				// Not all ASICs have DCCG sw component
168 				res_pool->ref_clocks.dccg_ref_clock_inKhz =
169 						res_pool->ref_clocks.xtalin_clock_inKhz;
170 				res_pool->ref_clocks.dchub_ref_clock_inKhz =
171 						res_pool->ref_clocks.xtalin_clock_inKhz;
172 			}
173 		}
174 	} else
175 		ASSERT_CRITICAL(false);
176 
177 	for (i = 0; i < dc->link_count; i++) {
178 		/* Power up AND update implementation according to the
179 		 * required signal (which may be different from the
180 		 * default signal on connector).
181 		 */
182 		struct dc_link *link = dc->links[i];
183 
184 		if (link->ep_type != DISPLAY_ENDPOINT_PHY)
185 			continue;
186 
187 		link->link_enc->funcs->hw_init(link->link_enc);
188 
189 		/* Check for enabled DIG to identify enabled display */
190 		if (link->link_enc->funcs->is_dig_enabled &&
191 			link->link_enc->funcs->is_dig_enabled(link->link_enc))
192 			link->link_status.link_active = true;
193 	}
194 
195 	/* Enables outbox notifications for usb4 dpia */
196 	if (dc->res_pool->usb4_dpia_count)
197 		dmub_enable_outbox_notification(dc->ctx->dmub_srv);
198 
199 	/* we want to turn off all dp displays before doing detection */
200 	dc_link_blank_all_dp_displays(dc);
201 
202 	if (hws->funcs.enable_power_gating_plane)
203 		hws->funcs.enable_power_gating_plane(dc->hwseq, true);
204 
205 	/* If taking control over from VBIOS, we may want to optimize our first
206 	 * mode set, so we need to skip powering down pipes until we know which
207 	 * pipes we want to use.
208 	 * Otherwise, if taking control is not possible, we need to power
209 	 * everything down.
210 	 */
211 	if (dcb->funcs->is_accelerated_mode(dcb) || !dc->config.seamless_boot_edp_requested) {
212 		hws->funcs.init_pipes(dc, dc->current_state);
213 		if (dc->res_pool->hubbub->funcs->allow_self_refresh_control)
214 			dc->res_pool->hubbub->funcs->allow_self_refresh_control(dc->res_pool->hubbub,
215 					!dc->res_pool->hubbub->ctx->dc->debug.disable_stutter);
216 	}
217 
218 	for (i = 0; i < res_pool->audio_count; i++) {
219 		struct audio *audio = res_pool->audios[i];
220 
221 		audio->funcs->hw_init(audio);
222 	}
223 
224 	for (i = 0; i < dc->link_count; i++) {
225 		struct dc_link *link = dc->links[i];
226 
227 		if (link->panel_cntl)
228 			backlight = link->panel_cntl->funcs->hw_init(link->panel_cntl);
229 	}
230 
231 	for (i = 0; i < dc->res_pool->pipe_count; i++) {
232 		if (abms[i] != NULL)
233 			abms[i]->funcs->abm_init(abms[i], backlight);
234 	}
235 
236 	/* power AFMT HDMI memory TODO: may move to dis/en output save power*/
237 	REG_WRITE(DIO_MEM_PWR_CTRL, 0);
238 
239 	// Set i2c to light sleep until engine is setup
240 	if (dc->debug.enable_mem_low_power.bits.i2c)
241 		REG_UPDATE(DIO_MEM_PWR_CTRL, I2C_LIGHT_SLEEP_FORCE, 1);
242 
243 	if (hws->funcs.setup_hpo_hw_control)
244 		hws->funcs.setup_hpo_hw_control(hws, false);
245 
246 	if (!dc->debug.disable_clock_gate) {
247 		/* enable all DCN clock gating */
248 		REG_WRITE(DCCG_GATE_DISABLE_CNTL, 0);
249 
250 		REG_WRITE(DCCG_GATE_DISABLE_CNTL2, 0);
251 
252 		REG_UPDATE(DCFCLK_CNTL, DCFCLK_GATE_DIS, 0);
253 	}
254 
255 	if (!dcb->funcs->is_accelerated_mode(dcb) && dc->res_pool->hubbub->funcs->init_watermarks)
256 		dc->res_pool->hubbub->funcs->init_watermarks(dc->res_pool->hubbub);
257 
258 	if (dc->clk_mgr->funcs->notify_wm_ranges)
259 		dc->clk_mgr->funcs->notify_wm_ranges(dc->clk_mgr);
260 
261 	if (dc->clk_mgr->funcs->set_hard_max_memclk)
262 		dc->clk_mgr->funcs->set_hard_max_memclk(dc->clk_mgr);
263 
264 	if (dc->res_pool->hubbub->funcs->force_pstate_change_control)
265 		dc->res_pool->hubbub->funcs->force_pstate_change_control(
266 				dc->res_pool->hubbub, false, false);
267 #if defined(CONFIG_DRM_AMD_DC_DCN)
268 	if (dc->res_pool->hubbub->funcs->init_crb)
269 		dc->res_pool->hubbub->funcs->init_crb(dc->res_pool->hubbub);
270 #endif
271 }
272 
273 void dcn31_dsc_pg_control(
274 		struct dce_hwseq *hws,
275 		unsigned int dsc_inst,
276 		bool power_on)
277 {
278 	uint32_t power_gate = power_on ? 0 : 1;
279 	uint32_t pwr_status = power_on ? 0 : 2;
280 	uint32_t org_ip_request_cntl = 0;
281 
282 	if (hws->ctx->dc->debug.disable_dsc_power_gate)
283 		return;
284 
285 	if (hws->ctx->dc->debug.root_clock_optimization.bits.dsc &&
286 		hws->ctx->dc->res_pool->dccg->funcs->enable_dsc &&
287 		power_on)
288 		hws->ctx->dc->res_pool->dccg->funcs->enable_dsc(
289 			hws->ctx->dc->res_pool->dccg, dsc_inst);
290 
291 	REG_GET(DC_IP_REQUEST_CNTL, IP_REQUEST_EN, &org_ip_request_cntl);
292 	if (org_ip_request_cntl == 0)
293 		REG_SET(DC_IP_REQUEST_CNTL, 0, IP_REQUEST_EN, 1);
294 
295 	switch (dsc_inst) {
296 	case 0: /* DSC0 */
297 		REG_UPDATE(DOMAIN16_PG_CONFIG,
298 				DOMAIN_POWER_GATE, power_gate);
299 
300 		REG_WAIT(DOMAIN16_PG_STATUS,
301 				DOMAIN_PGFSM_PWR_STATUS, pwr_status,
302 				1, 1000);
303 		break;
304 	case 1: /* DSC1 */
305 		REG_UPDATE(DOMAIN17_PG_CONFIG,
306 				DOMAIN_POWER_GATE, power_gate);
307 
308 		REG_WAIT(DOMAIN17_PG_STATUS,
309 				DOMAIN_PGFSM_PWR_STATUS, pwr_status,
310 				1, 1000);
311 		break;
312 	case 2: /* DSC2 */
313 		REG_UPDATE(DOMAIN18_PG_CONFIG,
314 				DOMAIN_POWER_GATE, power_gate);
315 
316 		REG_WAIT(DOMAIN18_PG_STATUS,
317 				DOMAIN_PGFSM_PWR_STATUS, pwr_status,
318 				1, 1000);
319 		break;
320 	default:
321 		BREAK_TO_DEBUGGER();
322 		break;
323 	}
324 
325 	if (org_ip_request_cntl == 0)
326 		REG_SET(DC_IP_REQUEST_CNTL, 0, IP_REQUEST_EN, 0);
327 
328 	if (hws->ctx->dc->debug.root_clock_optimization.bits.dsc) {
329 		if (hws->ctx->dc->res_pool->dccg->funcs->disable_dsc && !power_on)
330 			hws->ctx->dc->res_pool->dccg->funcs->disable_dsc(
331 				hws->ctx->dc->res_pool->dccg, dsc_inst);
332 	}
333 
334 }
335 
336 
337 void dcn31_enable_power_gating_plane(
338 	struct dce_hwseq *hws,
339 	bool enable)
340 {
341 	bool force_on = true; /* disable power gating */
342 	uint32_t org_ip_request_cntl = 0;
343 
344 	if (enable && !hws->ctx->dc->debug.disable_hubp_power_gate)
345 		force_on = false;
346 
347 	REG_GET(DC_IP_REQUEST_CNTL, IP_REQUEST_EN, &org_ip_request_cntl);
348 	if (org_ip_request_cntl == 0)
349 		REG_SET(DC_IP_REQUEST_CNTL, 0, IP_REQUEST_EN, 1);
350 	/* DCHUBP0/1/2/3/4/5 */
351 	REG_UPDATE(DOMAIN0_PG_CONFIG, DOMAIN_POWER_FORCEON, force_on);
352 	REG_UPDATE(DOMAIN2_PG_CONFIG, DOMAIN_POWER_FORCEON, force_on);
353 	/* DPP0/1/2/3/4/5 */
354 	REG_UPDATE(DOMAIN1_PG_CONFIG, DOMAIN_POWER_FORCEON, force_on);
355 	REG_UPDATE(DOMAIN3_PG_CONFIG, DOMAIN_POWER_FORCEON, force_on);
356 
357 	force_on = true; /* disable power gating */
358 	if (enable && !hws->ctx->dc->debug.disable_dsc_power_gate)
359 		force_on = false;
360 
361 	/* DCS0/1/2/3/4/5 */
362 	REG_UPDATE(DOMAIN16_PG_CONFIG, DOMAIN_POWER_FORCEON, force_on);
363 	REG_UPDATE(DOMAIN17_PG_CONFIG, DOMAIN_POWER_FORCEON, force_on);
364 	REG_UPDATE(DOMAIN18_PG_CONFIG, DOMAIN_POWER_FORCEON, force_on);
365 
366 	if (org_ip_request_cntl == 0)
367 		REG_SET(DC_IP_REQUEST_CNTL, 0, IP_REQUEST_EN, 0);
368 }
369 
370 void dcn31_update_info_frame(struct pipe_ctx *pipe_ctx)
371 {
372 	bool is_hdmi_tmds;
373 	bool is_dp;
374 
375 	ASSERT(pipe_ctx->stream);
376 
377 	if (pipe_ctx->stream_res.stream_enc == NULL)
378 		return;  /* this is not root pipe */
379 
380 	is_hdmi_tmds = dc_is_hdmi_tmds_signal(pipe_ctx->stream->signal);
381 	is_dp = dc_is_dp_signal(pipe_ctx->stream->signal);
382 
383 	if (!is_hdmi_tmds && !is_dp)
384 		return;
385 
386 	if (is_hdmi_tmds)
387 		pipe_ctx->stream_res.stream_enc->funcs->update_hdmi_info_packets(
388 			pipe_ctx->stream_res.stream_enc,
389 			&pipe_ctx->stream_res.encoder_info_frame);
390 	else {
391 		pipe_ctx->stream_res.stream_enc->funcs->update_dp_info_packets(
392 			pipe_ctx->stream_res.stream_enc,
393 			&pipe_ctx->stream_res.encoder_info_frame);
394 	}
395 }
396 void dcn31_z10_save_init(struct dc *dc)
397 {
398 	union dmub_rb_cmd cmd;
399 
400 	memset(&cmd, 0, sizeof(cmd));
401 	cmd.dcn_restore.header.type = DMUB_CMD__IDLE_OPT;
402 	cmd.dcn_restore.header.sub_type = DMUB_CMD__IDLE_OPT_DCN_SAVE_INIT;
403 
404 	dc_dmub_srv_cmd_queue(dc->ctx->dmub_srv, &cmd);
405 	dc_dmub_srv_cmd_execute(dc->ctx->dmub_srv);
406 	dc_dmub_srv_wait_idle(dc->ctx->dmub_srv);
407 }
408 
409 void dcn31_z10_restore(const struct dc *dc)
410 {
411 	union dmub_rb_cmd cmd;
412 
413 	/*
414 	 * DMUB notifies whether restore is required.
415 	 * Optimization to avoid sending commands when not required.
416 	 */
417 	if (!dc_dmub_srv_is_restore_required(dc->ctx->dmub_srv))
418 		return;
419 
420 	memset(&cmd, 0, sizeof(cmd));
421 	cmd.dcn_restore.header.type = DMUB_CMD__IDLE_OPT;
422 	cmd.dcn_restore.header.sub_type = DMUB_CMD__IDLE_OPT_DCN_RESTORE;
423 
424 	dc_dmub_srv_cmd_queue(dc->ctx->dmub_srv, &cmd);
425 	dc_dmub_srv_cmd_execute(dc->ctx->dmub_srv);
426 	dc_dmub_srv_wait_idle(dc->ctx->dmub_srv);
427 }
428 
429 void dcn31_hubp_pg_control(struct dce_hwseq *hws, unsigned int hubp_inst, bool power_on)
430 {
431 	uint32_t power_gate = power_on ? 0 : 1;
432 	uint32_t pwr_status = power_on ? 0 : 2;
433 	uint32_t org_ip_request_cntl;
434 	if (hws->ctx->dc->debug.disable_hubp_power_gate)
435 		return;
436 
437 	if (REG(DOMAIN0_PG_CONFIG) == 0)
438 		return;
439 	REG_GET(DC_IP_REQUEST_CNTL, IP_REQUEST_EN, &org_ip_request_cntl);
440 	if (org_ip_request_cntl == 0)
441 		REG_SET(DC_IP_REQUEST_CNTL, 0, IP_REQUEST_EN, 1);
442 
443 	switch (hubp_inst) {
444 	case 0:
445 		REG_SET(DOMAIN0_PG_CONFIG, 0, DOMAIN_POWER_GATE, power_gate);
446 		REG_WAIT(DOMAIN0_PG_STATUS, DOMAIN_PGFSM_PWR_STATUS, pwr_status, 1, 1000);
447 		break;
448 	case 1:
449 		REG_SET(DOMAIN1_PG_CONFIG, 0, DOMAIN_POWER_GATE, power_gate);
450 		REG_WAIT(DOMAIN1_PG_STATUS, DOMAIN_PGFSM_PWR_STATUS, pwr_status, 1, 1000);
451 		break;
452 	case 2:
453 		REG_SET(DOMAIN2_PG_CONFIG, 0, DOMAIN_POWER_GATE, power_gate);
454 		REG_WAIT(DOMAIN2_PG_STATUS, DOMAIN_PGFSM_PWR_STATUS, pwr_status, 1, 1000);
455 		break;
456 	case 3:
457 		REG_SET(DOMAIN3_PG_CONFIG, 0, DOMAIN_POWER_GATE, power_gate);
458 		REG_WAIT(DOMAIN3_PG_STATUS, DOMAIN_PGFSM_PWR_STATUS, pwr_status, 1, 1000);
459 		break;
460 	default:
461 		BREAK_TO_DEBUGGER();
462 		break;
463 	}
464 	if (org_ip_request_cntl == 0)
465 		REG_SET(DC_IP_REQUEST_CNTL, 0, IP_REQUEST_EN, 0);
466 }
467 
468 int dcn31_init_sys_ctx(struct dce_hwseq *hws, struct dc *dc, struct dc_phy_addr_space_config *pa_config)
469 {
470 	struct dcn_hubbub_phys_addr_config config;
471 
472 	config.system_aperture.fb_top = pa_config->system_aperture.fb_top;
473 	config.system_aperture.fb_offset = pa_config->system_aperture.fb_offset;
474 	config.system_aperture.fb_base = pa_config->system_aperture.fb_base;
475 	config.system_aperture.agp_top = pa_config->system_aperture.agp_top;
476 	config.system_aperture.agp_bot = pa_config->system_aperture.agp_bot;
477 	config.system_aperture.agp_base = pa_config->system_aperture.agp_base;
478 	config.gart_config.page_table_start_addr = pa_config->gart_config.page_table_start_addr;
479 	config.gart_config.page_table_end_addr = pa_config->gart_config.page_table_end_addr;
480 
481 	if (pa_config->gart_config.base_addr_is_mc_addr) {
482 		/* Convert from MC address to offset into FB */
483 		config.gart_config.page_table_base_addr = pa_config->gart_config.page_table_base_addr -
484 				pa_config->system_aperture.fb_base +
485 				pa_config->system_aperture.fb_offset;
486 	} else
487 		config.gart_config.page_table_base_addr = pa_config->gart_config.page_table_base_addr;
488 
489 	return dc->res_pool->hubbub->funcs->init_dchub_sys_ctx(dc->res_pool->hubbub, &config);
490 }
491 
492 static void dcn31_reset_back_end_for_pipe(
493 		struct dc *dc,
494 		struct pipe_ctx *pipe_ctx,
495 		struct dc_state *context)
496 {
497 	struct dc_link *link;
498 
499 	DC_LOGGER_INIT(dc->ctx->logger);
500 	if (pipe_ctx->stream_res.stream_enc == NULL) {
501 		pipe_ctx->stream = NULL;
502 		return;
503 	}
504 	ASSERT(!pipe_ctx->top_pipe);
505 
506 	dc->hwss.set_abm_immediate_disable(pipe_ctx);
507 
508 	pipe_ctx->stream_res.tg->funcs->set_dsc_config(
509 			pipe_ctx->stream_res.tg,
510 			OPTC_DSC_DISABLED, 0, 0);
511 	pipe_ctx->stream_res.tg->funcs->disable_crtc(pipe_ctx->stream_res.tg);
512 
513 	pipe_ctx->stream_res.tg->funcs->enable_optc_clock(pipe_ctx->stream_res.tg, false);
514 	if (pipe_ctx->stream_res.tg->funcs->set_odm_bypass)
515 		pipe_ctx->stream_res.tg->funcs->set_odm_bypass(
516 				pipe_ctx->stream_res.tg, &pipe_ctx->stream->timing);
517 
518 	if (pipe_ctx->stream_res.tg->funcs->set_drr)
519 		pipe_ctx->stream_res.tg->funcs->set_drr(
520 				pipe_ctx->stream_res.tg, NULL);
521 
522 	if (!IS_FPGA_MAXIMUS_DC(dc->ctx->dce_environment)) {
523 		link = pipe_ctx->stream->link;
524 		/* DPMS may already disable or */
525 		/* dpms_off status is incorrect due to fastboot
526 		 * feature. When system resume from S4 with second
527 		 * screen only, the dpms_off would be true but
528 		 * VBIOS lit up eDP, so check link status too.
529 		 */
530 		if (!pipe_ctx->stream->dpms_off || link->link_status.link_active)
531 			core_link_disable_stream(pipe_ctx);
532 		else if (pipe_ctx->stream_res.audio)
533 			dc->hwss.disable_audio_stream(pipe_ctx);
534 
535 		/* free acquired resources */
536 		if (pipe_ctx->stream_res.audio) {
537 			/*disable az_endpoint*/
538 			pipe_ctx->stream_res.audio->funcs->az_disable(pipe_ctx->stream_res.audio);
539 
540 			/*free audio*/
541 			if (dc->caps.dynamic_audio == true) {
542 				/*we have to dynamic arbitrate the audio endpoints*/
543 				/*we free the resource, need reset is_audio_acquired*/
544 				update_audio_usage(&dc->current_state->res_ctx, dc->res_pool,
545 						pipe_ctx->stream_res.audio, false);
546 				pipe_ctx->stream_res.audio = NULL;
547 			}
548 		}
549 	} else if (pipe_ctx->stream_res.dsc) {
550 			dp_set_dsc_enable(pipe_ctx, false);
551 	}
552 
553 	pipe_ctx->stream = NULL;
554 	DC_LOG_DEBUG("Reset back end for pipe %d, tg:%d\n",
555 					pipe_ctx->pipe_idx, pipe_ctx->stream_res.tg->inst);
556 }
557 
558 void dcn31_reset_hw_ctx_wrap(
559 		struct dc *dc,
560 		struct dc_state *context)
561 {
562 	int i;
563 	struct dce_hwseq *hws = dc->hwseq;
564 
565 	/* Reset Back End*/
566 	for (i = dc->res_pool->pipe_count - 1; i >= 0 ; i--) {
567 		struct pipe_ctx *pipe_ctx_old =
568 			&dc->current_state->res_ctx.pipe_ctx[i];
569 		struct pipe_ctx *pipe_ctx = &context->res_ctx.pipe_ctx[i];
570 
571 		if (!pipe_ctx_old->stream)
572 			continue;
573 
574 		if (pipe_ctx_old->top_pipe || pipe_ctx_old->prev_odm_pipe)
575 			continue;
576 
577 		if (!pipe_ctx->stream ||
578 				pipe_need_reprogram(pipe_ctx_old, pipe_ctx)) {
579 			struct clock_source *old_clk = pipe_ctx_old->clock_source;
580 
581 			dcn31_reset_back_end_for_pipe(dc, pipe_ctx_old, dc->current_state);
582 			if (hws->funcs.enable_stream_gating)
583 				hws->funcs.enable_stream_gating(dc, pipe_ctx_old);
584 			if (old_clk)
585 				old_clk->funcs->cs_power_down(old_clk);
586 		}
587 	}
588 
589 	/* New dc_state in the process of being applied to hardware. */
590 	dc->current_state->res_ctx.link_enc_cfg_ctx.mode = LINK_ENC_CFG_TRANSIENT;
591 }
592 
593 void dcn31_setup_hpo_hw_control(const struct dce_hwseq *hws, bool enable)
594 {
595 	if (hws->ctx->dc->debug.hpo_optimization)
596 		REG_UPDATE(HPO_TOP_HW_CONTROL, HPO_IO_EN, !!enable);
597 }
598