1 /* 2 * Copyright 2020 Mauro Rossi <issor.oruam@gmail.com> 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 "dccg.h" 28 #include "clk_mgr_internal.h" 29 #include "dce100/dce_clk_mgr.h" 30 #include "dce110/dce110_clk_mgr.h" 31 #include "dce60_clk_mgr.h" 32 #include "reg_helper.h" 33 #include "dmcu.h" 34 #include "core_types.h" 35 #include "dal_asic_id.h" 36 37 /* 38 * Currently the register shifts and masks in this file are used for dce60 39 * which has no DPREFCLK_CNTL register 40 * TODO: remove this when DENTIST_DISPCLK_CNTL 41 * is moved to dccg, where it belongs 42 */ 43 #include "dce/dce_6_0_d.h" 44 #include "dce/dce_6_0_sh_mask.h" 45 46 #define REG(reg) \ 47 (clk_mgr->regs->reg) 48 49 #undef FN 50 #define FN(reg_name, field_name) \ 51 clk_mgr->clk_mgr_shift->field_name, clk_mgr->clk_mgr_mask->field_name 52 53 /* set register offset */ 54 #define SR(reg_name)\ 55 .reg_name = mm ## reg_name 56 57 static const struct clk_mgr_registers disp_clk_regs = { 58 CLK_COMMON_REG_LIST_DCE60_BASE() 59 }; 60 61 static const struct clk_mgr_shift disp_clk_shift = { 62 CLK_COMMON_MASK_SH_LIST_DCE60_COMMON_BASE(__SHIFT) 63 }; 64 65 static const struct clk_mgr_mask disp_clk_mask = { 66 CLK_COMMON_MASK_SH_LIST_DCE60_COMMON_BASE(_MASK) 67 }; 68 69 70 /* Max clock values for each state indexed by "enum clocks_state": */ 71 static const struct state_dependent_clocks dce60_max_clks_by_state[] = { 72 /* ClocksStateInvalid - should not be used */ 73 { .display_clk_khz = 0, .pixel_clk_khz = 0 }, 74 /* ClocksStateUltraLow - not expected to be used for DCE 6.0 */ 75 { .display_clk_khz = 0, .pixel_clk_khz = 0 }, 76 /* ClocksStateLow */ 77 { .display_clk_khz = 352000, .pixel_clk_khz = 330000}, 78 /* ClocksStateNominal */ 79 { .display_clk_khz = 600000, .pixel_clk_khz = 400000 }, 80 /* ClocksStatePerformance */ 81 { .display_clk_khz = 600000, .pixel_clk_khz = 400000 } }; 82 83 static int dce60_get_dp_ref_freq_khz(struct clk_mgr *clk_mgr_base) 84 { 85 struct clk_mgr_internal *clk_mgr = TO_CLK_MGR_INTERNAL(clk_mgr_base); 86 int dprefclk_wdivider; 87 int dp_ref_clk_khz; 88 int target_div; 89 90 /* DCE6 has no DPREFCLK_CNTL to read DP Reference Clock source */ 91 92 /* Read the mmDENTIST_DISPCLK_CNTL to get the currently 93 * programmed DID DENTIST_DPREFCLK_WDIVIDER*/ 94 REG_GET(DENTIST_DISPCLK_CNTL, DENTIST_DPREFCLK_WDIVIDER, &dprefclk_wdivider); 95 96 /* Convert DENTIST_DPREFCLK_WDIVIDERto actual divider*/ 97 target_div = dentist_get_divider_from_did(dprefclk_wdivider); 98 99 /* Calculate the current DFS clock, in kHz.*/ 100 dp_ref_clk_khz = (DENTIST_DIVIDER_RANGE_SCALE_FACTOR 101 * clk_mgr->base.dentist_vco_freq_khz) / target_div; 102 103 return dce_adjust_dp_ref_freq_for_ss(clk_mgr, dp_ref_clk_khz); 104 } 105 106 static void dce60_pplib_apply_display_requirements( 107 struct dc *dc, 108 struct dc_state *context) 109 { 110 struct dm_pp_display_configuration *pp_display_cfg = &context->pp_display_cfg; 111 112 pp_display_cfg->avail_mclk_switch_time_us = dce110_get_min_vblank_time_us(context); 113 114 dce110_fill_display_configs(context, pp_display_cfg); 115 116 if (memcmp(&dc->current_state->pp_display_cfg, pp_display_cfg, sizeof(*pp_display_cfg)) != 0) 117 dm_pp_apply_display_requirements(dc->ctx, pp_display_cfg); 118 } 119 120 static void dce60_update_clocks(struct clk_mgr *clk_mgr_base, 121 struct dc_state *context, 122 bool safe_to_lower) 123 { 124 struct clk_mgr_internal *clk_mgr_dce = TO_CLK_MGR_INTERNAL(clk_mgr_base); 125 struct dm_pp_power_level_change_request level_change_req; 126 int patched_disp_clk = context->bw_ctx.bw.dce.dispclk_khz; 127 128 /*TODO: W/A for dal3 linux, investigate why this works */ 129 if (!clk_mgr_dce->dfs_bypass_active) 130 patched_disp_clk = patched_disp_clk * 115 / 100; 131 132 level_change_req.power_level = dce_get_required_clocks_state(clk_mgr_base, context); 133 /* get max clock state from PPLIB */ 134 if ((level_change_req.power_level < clk_mgr_dce->cur_min_clks_state && safe_to_lower) 135 || level_change_req.power_level > clk_mgr_dce->cur_min_clks_state) { 136 if (dm_pp_apply_power_level_change_request(clk_mgr_base->ctx, &level_change_req)) 137 clk_mgr_dce->cur_min_clks_state = level_change_req.power_level; 138 } 139 140 if (should_set_clock(safe_to_lower, patched_disp_clk, clk_mgr_base->clks.dispclk_khz)) { 141 patched_disp_clk = dce_set_clock(clk_mgr_base, patched_disp_clk); 142 clk_mgr_base->clks.dispclk_khz = patched_disp_clk; 143 } 144 dce60_pplib_apply_display_requirements(clk_mgr_base->ctx->dc, context); 145 } 146 147 148 149 150 151 152 153 154 static struct clk_mgr_funcs dce60_funcs = { 155 .get_dp_ref_clk_frequency = dce60_get_dp_ref_freq_khz, 156 .update_clocks = dce60_update_clocks 157 }; 158 159 void dce60_clk_mgr_construct( 160 struct dc_context *ctx, 161 struct clk_mgr_internal *clk_mgr) 162 { 163 dce_clk_mgr_construct(ctx, clk_mgr); 164 165 memcpy(clk_mgr->max_clks_by_state, 166 dce60_max_clks_by_state, 167 sizeof(dce60_max_clks_by_state)); 168 169 clk_mgr->regs = &disp_clk_regs; 170 clk_mgr->clk_mgr_shift = &disp_clk_shift; 171 clk_mgr->clk_mgr_mask = &disp_clk_mask; 172 clk_mgr->base.funcs = &dce60_funcs; 173 } 174 175