drivers/gpu/drm/amd/display/dc/clk_mgr/dce110/dce110_clk_mgr.c

   1 /*
   2  * Copyright 2012-16 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 #include "core_types.h"
  27 #include "clk_mgr_internal.h"
  28
  29 #include "dce/dce_11_0_d.h"
  30 #include "dce/dce_11_0_sh_mask.h"
  31 #include "dce110_clk_mgr.h"
  32 #include "../clk_mgr/dce100/dce_clk_mgr.h"
  33
  34 /* set register offset */
  35 #define SR(reg_name)\
  36         .reg_name = mm ## reg_name
  37
  38 /* set register offset with instance */
  39 #define SRI(reg_name, block, id)\
  40         .reg_name = mm ## block ## id ## _ ## reg_name
  41
  42 static const struct clk_mgr_registers disp_clk_regs = {
  43                 CLK_COMMON_REG_LIST_DCE_BASE()
  44 };
  45
  46 static const struct clk_mgr_shift disp_clk_shift = {
  47                 CLK_COMMON_MASK_SH_LIST_DCE_COMMON_BASE(__SHIFT)
  48 };
  49
  50 static const struct clk_mgr_mask disp_clk_mask = {
  51                 CLK_COMMON_MASK_SH_LIST_DCE_COMMON_BASE(_MASK)
  52 };
  53
  54 static const struct state_dependent_clocks dce110_max_clks_by_state[] = {
  55 /*ClocksStateInvalid - should not be used*/
  56 { .display_clk_khz = 0, .pixel_clk_khz = 0 },
  57 /*ClocksStateUltraLow - currently by HW design team not supposed to be used*/
  58 { .display_clk_khz = 352000, .pixel_clk_khz = 330000 },
  59 /*ClocksStateLow*/
  60 { .display_clk_khz = 352000, .pixel_clk_khz = 330000 },
  61 /*ClocksStateNominal*/
  62 { .display_clk_khz = 467000, .pixel_clk_khz = 400000 },
  63 /*ClocksStatePerformance*/
  64 { .display_clk_khz = 643000, .pixel_clk_khz = 400000 } };
  65
  66 static int determine_sclk_from_bounding_box(
  67                 const struct dc *dc,
  68                 int required_sclk)
  69 {
  70         int i;
  71
  72         /*
  73          * Some asics do not give us sclk levels, so we just report the actual
  74          * required sclk
  75          */
  76         if (dc->sclk_lvls.num_levels == 0)
  77                 return required_sclk;
  78
  79         for (i = 0; i < dc->sclk_lvls.num_levels; i++) {
  80                 if (dc->sclk_lvls.clocks_in_khz[i] >= required_sclk)
  81                         return dc->sclk_lvls.clocks_in_khz[i];
  82         }
  83         /*
  84          * even maximum level could not satisfy requirement, this
  85          * is unexpected at this stage, should have been caught at
  86          * validation time
  87          */
  88         ASSERT(0);
  89         return dc->sclk_lvls.clocks_in_khz[dc->sclk_lvls.num_levels - 1];
  90 }
  91
  92 uint32_t dce110_get_min_vblank_time_us(const struct dc_state *context)
  93 {
  94         uint8_t j;
  95         uint32_t min_vertical_blank_time = -1;
  96
  97         for (j = 0; j < context->stream_count; j++) {
  98                 struct dc_stream_state *stream = context->streams[j];
  99                 uint32_t vertical_blank_in_pixels = 0;
 100                 uint32_t vertical_blank_time = 0;
 101
 102                 vertical_blank_in_pixels = stream->timing.h_total *
 103                         (stream->timing.v_total
 104                          - stream->timing.v_addressable);
 105
 106                 vertical_blank_time = vertical_blank_in_pixels
 107                         * 10000 / stream->timing.pix_clk_100hz;
 108
 109                 if (min_vertical_blank_time > vertical_blank_time)
 110                         min_vertical_blank_time = vertical_blank_time;
 111         }
 112
 113         return min_vertical_blank_time;
 114 }
 115
 116 void dce110_fill_display_configs(
 117         const struct dc_state *context,
 118         struct dm_pp_display_configuration *pp_display_cfg)
 119 {
 120         int j;
 121         int num_cfgs = 0;
 122
 123         for (j = 0; j < context->stream_count; j++) {
 124                 int k;
 125
 126                 const struct dc_stream_state *stream = context->streams[j];
 127                 struct dm_pp_single_disp_config *cfg =
 128                         &pp_display_cfg->disp_configs[num_cfgs];
 129                 const struct pipe_ctx *pipe_ctx = NULL;
 130
 131                 for (k = 0; k < MAX_PIPES; k++)
 132                         if (stream == context->res_ctx.pipe_ctx[k].stream) {
 133                                 pipe_ctx = &context->res_ctx.pipe_ctx[k];
 134                                 break;
 135                         }
 136
 137                 ASSERT(pipe_ctx != NULL);
 138
 139                 /* only notify active stream */
 140                 if (stream->dpms_off)
 141                         continue;
 142
 143                 num_cfgs++;
 144                 cfg->signal = pipe_ctx->stream->signal;
 145                 cfg->pipe_idx = pipe_ctx->stream_res.tg->inst;
 146                 cfg->src_height = stream->src.height;
 147                 cfg->src_width = stream->src.width;
 148                 cfg->ddi_channel_mapping =
 149                         stream->link->ddi_channel_mapping.raw;
 150                 cfg->transmitter =
 151                         stream->link->link_enc->transmitter;
 152                 cfg->link_settings.lane_count =
 153                         stream->link->cur_link_settings.lane_count;
 154                 cfg->link_settings.link_rate =
 155                         stream->link->cur_link_settings.link_rate;
 156                 cfg->link_settings.link_spread =
 157                         stream->link->cur_link_settings.link_spread;
 158                 cfg->sym_clock = stream->phy_pix_clk;
 159                 /* Round v_refresh*/
 160                 cfg->v_refresh = stream->timing.pix_clk_100hz * 100;
 161                 cfg->v_refresh /= stream->timing.h_total;
 162                 cfg->v_refresh = (cfg->v_refresh + stream->timing.v_total / 2)
 163                                                         / stream->timing.v_total;
 164         }
 165
 166         pp_display_cfg->display_count = num_cfgs;
 167 }
 168
 169 void dce11_pplib_apply_display_requirements(
 170         struct dc *dc,
 171         struct dc_state *context)
 172 {
 173         struct dm_pp_display_configuration *pp_display_cfg = &context->pp_display_cfg;
 174
 175         pp_display_cfg->all_displays_in_sync =
 176                 context->bw_ctx.bw.dce.all_displays_in_sync;
 177         pp_display_cfg->nb_pstate_switch_disable =
 178                         context->bw_ctx.bw.dce.nbp_state_change_enable == false;
 179         pp_display_cfg->cpu_cc6_disable =
 180                         context->bw_ctx.bw.dce.cpuc_state_change_enable == false;
 181         pp_display_cfg->cpu_pstate_disable =
 182                         context->bw_ctx.bw.dce.cpup_state_change_enable == false;
 183         pp_display_cfg->cpu_pstate_separation_time =
 184                         context->bw_ctx.bw.dce.blackout_recovery_time_us;
 185
 186         pp_display_cfg->min_memory_clock_khz = context->bw_ctx.bw.dce.yclk_khz
 187                 / MEMORY_TYPE_MULTIPLIER_CZ;
 188
 189         pp_display_cfg->min_engine_clock_khz = determine_sclk_from_bounding_box(
 190                         dc,
 191                         context->bw_ctx.bw.dce.sclk_khz);
 192
 193         /*
 194          * As workaround for >4x4K lightup set dcfclock to min_engine_clock value.
 195          * This is not required for less than 5 displays,
 196          * thus don't request decfclk in dc to avoid impact
 197          * on power saving.
 198          *
 199          */
 200         pp_display_cfg->min_dcfclock_khz = (context->stream_count > 4) ?
 201                         pp_display_cfg->min_engine_clock_khz : 0;
 202
 203         pp_display_cfg->min_engine_clock_deep_sleep_khz
 204                         = context->bw_ctx.bw.dce.sclk_deep_sleep_khz;
 205
 206         pp_display_cfg->avail_mclk_switch_time_us =
 207                                                 dce110_get_min_vblank_time_us(context);
 208         /* TODO: dce11.2*/
 209         pp_display_cfg->avail_mclk_switch_time_in_disp_active_us = 0;
 210
 211         pp_display_cfg->disp_clk_khz = dc->clk_mgr->clks.dispclk_khz;
 212
 213         dce110_fill_display_configs(context, pp_display_cfg);
 214
 215         /* TODO: is this still applicable?*/
 216         if (pp_display_cfg->display_count == 1) {
 217                 const struct dc_crtc_timing *timing =
 218                         &context->streams[0]->timing;
 219
 220                 pp_display_cfg->crtc_index =
 221                         pp_display_cfg->disp_configs[0].pipe_idx;
 222                 pp_display_cfg->line_time_in_us = timing->h_total * 10000 / timing->pix_clk_100hz;
 223         }
 224
 225         if (memcmp(&dc->current_state->pp_display_cfg, pp_display_cfg, sizeof(*pp_display_cfg)) !=  0)
 226                 dm_pp_apply_display_requirements(dc->ctx, pp_display_cfg);
 227 }
 228
 229 static void dce11_update_clocks(struct clk_mgr *clk_mgr_base,
 230                         struct dc_state *context,
 231                         bool safe_to_lower)
 232 {
 233         struct clk_mgr_internal *clk_mgr_dce = TO_CLK_MGR_INTERNAL(clk_mgr_base);
 234         struct dm_pp_power_level_change_request level_change_req;
 235         int patched_disp_clk = context->bw_ctx.bw.dce.dispclk_khz;
 236
 237         /*TODO: W/A for dal3 linux, investigate why this works */
 238         if (!clk_mgr_dce->dfs_bypass_active)
 239                 patched_disp_clk = patched_disp_clk * 115 / 100;
 240
 241         level_change_req.power_level = dce_get_required_clocks_state(clk_mgr_base, context);
 242         /* get max clock state from PPLIB */
 243         if ((level_change_req.power_level < clk_mgr_dce->cur_min_clks_state && safe_to_lower)
 244                         || level_change_req.power_level > clk_mgr_dce->cur_min_clks_state) {
 245                 if (dm_pp_apply_power_level_change_request(clk_mgr_base->ctx, &level_change_req))
 246                         clk_mgr_dce->cur_min_clks_state = level_change_req.power_level;
 247         }
 248
 249         if (should_set_clock(safe_to_lower, patched_disp_clk, clk_mgr_base->clks.dispclk_khz)) {
 250                 context->bw_ctx.bw.dce.dispclk_khz = dce_set_clock(clk_mgr_base, patched_disp_clk);
 251                 clk_mgr_base->clks.dispclk_khz = patched_disp_clk;
 252         }
 253         dce11_pplib_apply_display_requirements(clk_mgr_base->ctx->dc, context);
 254 }
 255
 256 static struct clk_mgr_funcs dce110_funcs = {
 257         .get_dp_ref_clk_frequency = dce_get_dp_ref_freq_khz,
 258         .update_clocks = dce11_update_clocks
 259 };
 260
 261 void dce110_clk_mgr_construct(
 262                 struct dc_context *ctx,
 263                 struct clk_mgr_internal *clk_mgr)
 264 {
 265         dce_clk_mgr_construct(ctx, clk_mgr);
 266
 267         memcpy(clk_mgr->max_clks_by_state,
 268                 dce110_max_clks_by_state,
 269                 sizeof(dce110_max_clks_by_state));
 270
 271         clk_mgr->regs = &disp_clk_regs;
 272         clk_mgr->clk_mgr_shift = &disp_clk_shift;
 273         clk_mgr->clk_mgr_mask = &disp_clk_mask;
 274         clk_mgr->base.funcs = &dce110_funcs;
 275
 276 }