diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/dcn30/dcn30_resource.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dcn30/dcn30_resource.c | 172 |
1 files changed, 171 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_resource.c b/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_resource.c index 4cf9a6cff46e..7f01463942fb 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_resource.c +++ b/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_resource.c @@ -1899,6 +1899,176 @@ validate_out: return out; } +static int get_refresh_rate(struct dc_state *context) +{ + int refresh_rate = 0; + int h_v_total = 0; + struct dc_crtc_timing *timing = NULL; + + if (context == NULL || context->streams[0] == NULL) + return 0; + + /* check if refresh rate at least 120hz */ + timing = &context->streams[0]->timing; + if (timing == NULL) + return 0; + + h_v_total = timing->h_total * timing->v_total; + if (h_v_total == 0) + return 0; + + refresh_rate = ((timing->pix_clk_100hz * 100) / (h_v_total)) + 1; + return refresh_rate; +} + +#define MAX_STRETCHED_V_BLANK 500 // in micro-seconds +/* + * Scaling factor for v_blank stretch calculations considering timing in + * micro-seconds and pixel clock in 100hz. + * Note: the parenthesis are necessary to ensure the correct order of + * operation where V_SCALE is used. + */ +#define V_SCALE (10000 / MAX_STRETCHED_V_BLANK) + +int get_frame_rate_at_max_stretch_100hz(struct dc_state *context) +{ + struct dc_crtc_timing *timing = NULL; + uint32_t sec_per_100_lines; + uint32_t max_v_blank; + uint32_t curr_v_blank; + uint32_t v_stretch_max; + uint32_t stretched_frame_pix_cnt; + uint32_t scaled_stretched_frame_pix_cnt; + uint32_t scaled_refresh_rate; + + if (context == NULL || context->streams[0] == NULL) + return 0; + + /* check if refresh rate at least 120hz */ + timing = &context->streams[0]->timing; + if (timing == NULL) + return 0; + + sec_per_100_lines = timing->pix_clk_100hz / timing->h_total + 1; + max_v_blank = sec_per_100_lines / V_SCALE + 1; + curr_v_blank = timing->v_total - timing->v_addressable; + v_stretch_max = (max_v_blank > curr_v_blank) ? (max_v_blank - curr_v_blank) : (0); + stretched_frame_pix_cnt = (v_stretch_max + timing->v_total) * timing->h_total; + scaled_stretched_frame_pix_cnt = stretched_frame_pix_cnt / 10000; + scaled_refresh_rate = (timing->pix_clk_100hz) / scaled_stretched_frame_pix_cnt + 1; + + return scaled_refresh_rate; +} + +bool is_refresh_rate_support_mclk_switch_using_fw_based_vblank_stretch(struct dc_state *context) +{ + int refresh_rate_max_stretch_100hz; + int min_refresh_100hz; + + if (context == NULL || context->streams[0] == NULL) + return false; + + refresh_rate_max_stretch_100hz = get_frame_rate_at_max_stretch_100hz(context); + min_refresh_100hz = context->streams[0]->timing.min_refresh_in_uhz / 10000; + + if (refresh_rate_max_stretch_100hz < min_refresh_100hz) + return false; + + return true; +} + +bool dcn30_can_support_mclk_switch_using_fw_based_vblank_stretch(struct dc *dc, struct dc_state *context) +{ + int refresh_rate = 0; + const int minimum_refreshrate_supported = 120; + + if (context == NULL || context->streams[0] == NULL) + return false; + + if (context->streams[0]->sink->edid_caps.panel_patch.disable_fams) + return false; + + if (dc->debug.disable_fams) + return false; + + if (!dc->caps.dmub_caps.mclk_sw) + return false; + + if (context->bw_ctx.bw.dcn.clk.fw_based_mclk_switching_shut_down) + return false; + + /* more then 1 monitor connected */ + if (context->stream_count != 1) + return false; + + refresh_rate = get_refresh_rate(context); + if (refresh_rate < minimum_refreshrate_supported) + return false; + + if (!is_refresh_rate_support_mclk_switch_using_fw_based_vblank_stretch(context)) + return false; + + // check if freesync enabled + if (!context->streams[0]->allow_freesync) + return false; + + if (context->streams[0]->vrr_active_variable) + return false; + + return true; +} + +/* + * set up FPO watermarks, pstate, dram latency + */ +void dcn30_setup_mclk_switch_using_fw_based_vblank_stretch(struct dc *dc, struct dc_state *context) +{ + ASSERT(dc != NULL && context != NULL); + if (dc == NULL || context == NULL) + return; + + /* Set wm_a.pstate so high natural MCLK switches are impossible: 4 seconds */ + context->bw_ctx.bw.dcn.watermarks.a.cstate_pstate.pstate_change_ns = 4U * 1000U * 1000U * 1000U; +} + +/* + * Finds dummy_latency_index when MCLK switching using firmware based + * vblank stretch is enabled. This function will iterate through the + * table of dummy pstate latencies until the lowest value that allows + * dm_allow_self_refresh_and_mclk_switch to happen is found + */ +int dcn30_find_dummy_latency_index_for_fw_based_mclk_switch(struct dc *dc, struct dc_state *context, + display_e2e_pipe_params_st *pipes, int pipe_cnt, int vlevel) +{ + const int max_latency_table_entries = 4; + int dummy_latency_index = 0; + + while (dummy_latency_index < max_latency_table_entries) { + context->bw_ctx.dml.soc.dram_clock_change_latency_us = + dc->clk_mgr->bw_params->dummy_pstate_table[dummy_latency_index].dummy_pstate_latency_us; + dcn30_internal_validate_bw(dc, context, pipes, &pipe_cnt, &vlevel, false); + + if (context->bw_ctx.dml.soc.allow_dram_self_refresh_or_dram_clock_change_in_vblank == + dm_allow_self_refresh_and_mclk_switch) + break; + + dummy_latency_index++; + } + + if (dummy_latency_index == max_latency_table_entries) { + ASSERT(dummy_latency_index != max_latency_table_entries); + /* If the execution gets here, it means dummy p_states are + * not possible. This should never happen and would mean + * something is severely wrong. + * Here we reset dummy_latency_index to 3, because it is + * better to have underflows than system crashes. + */ + dummy_latency_index = 3; + } + + return dummy_latency_index; +} + void dcn30_update_soc_for_wm_a(struct dc *dc, struct dc_state *context) { DC_FP_START(); @@ -2209,7 +2379,7 @@ static bool dcn30_resource_construct( dc->caps.color.mpc.ogam_rom_caps.hlg = 0; dc->caps.color.mpc.ocsc = 1; - dc->caps.hdmi_frl_pcon_support = true; + dc->caps.dp_hdmi21_pcon_support = true; /* read VBIOS LTTPR caps */ { |