From 766ec49917d91473e96859b4b36ec64c1a1212c2 Mon Sep 17 00:00:00 2001 From: Nicholas Kazlauskas Date: Fri, 5 Jul 2019 16:54:28 -0400 Subject: [PATCH 3099/4256] drm/amd/display: Force uclk to max for every state Workaround for now to avoid underflow. The uclk switch time should really be bumped up to 404, but doing so would expose p-state hang issues for higher bandwidth display configurations. Signed-off-by: Nicholas Kazlauskas Signed-off-by: Leo Li Reviewed-by: Zhan Liu --- .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_pp_smu.c | 6 +++--- drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c | 10 ++++++++++ 2 files changed, 13 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_pp_smu.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_pp_smu.c index e0f1bd32567d..7bc7abcf3db1 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_pp_smu.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_pp_smu.c @@ -912,11 +912,11 @@ void dm_pp_get_funcs( /* todo set_pme_wa_enable cause 4k@6ohz display not light up */ funcs->nv_funcs.set_pme_wa_enable = NULL; /* todo debug waring message */ - funcs->nv_funcs.set_hard_min_uclk_by_freq = NULL; + funcs->nv_funcs.set_hard_min_uclk_by_freq = pp_nv_set_hard_min_uclk_by_freq; /* todo compare data with window driver*/ - funcs->nv_funcs.get_maximum_sustainable_clocks = NULL; + funcs->nv_funcs.get_maximum_sustainable_clocks = pp_nv_get_maximum_sustainable_clocks; /*todo compare data with window driver */ - funcs->nv_funcs.get_uclk_dpm_states = NULL; + funcs->nv_funcs.get_uclk_dpm_states = pp_nv_get_uclk_dpm_states; break; #endif default: diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c index 2cf788a3704e..44537651f0a1 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c +++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c @@ -2707,6 +2707,9 @@ static void cap_soc_clocks( && max_clocks.uClockInKhz != 0) bb->clock_limits[i].dram_speed_mts = (max_clocks.uClockInKhz / 1000) * 16; + // HACK: Force every uclk to max for now to "disable" uclk switching. + bb->clock_limits[i].dram_speed_mts = (max_clocks.uClockInKhz / 1000) * 16; + if ((bb->clock_limits[i].fabricclk_mhz > (max_clocks.fabricClockInKhz / 1000)) && max_clocks.fabricClockInKhz != 0) bb->clock_limits[i].fabricclk_mhz = (max_clocks.fabricClockInKhz / 1000); @@ -2922,6 +2925,8 @@ static bool init_soc_bounding_box(struct dc *dc, le32_to_cpu(bb->vmm_page_size_bytes); dcn2_0_soc.dram_clock_change_latency_us = fixed16_to_double_to_cpu(bb->dram_clock_change_latency_us); + // HACK!! Lower uclock latency switch time so we don't switch + dcn2_0_soc.dram_clock_change_latency_us = 10; dcn2_0_soc.writeback_dram_clock_change_latency_us = fixed16_to_double_to_cpu(bb->writeback_dram_clock_change_latency_us); dcn2_0_soc.return_bus_width_bytes = @@ -2963,6 +2968,7 @@ static bool init_soc_bounding_box(struct dc *dc, struct pp_smu_nv_clock_table max_clocks = {0}; unsigned int uclk_states[8] = {0}; unsigned int num_states = 0; + int i; enum pp_smu_status status; bool clock_limits_available = false; bool uclk_states_available = false; @@ -2984,6 +2990,10 @@ static bool init_soc_bounding_box(struct dc *dc, clock_limits_available = (status == PP_SMU_RESULT_OK); } + // HACK: Use the max uclk_states value for all elements. + for (i = 0; i < num_states; i++) + uclk_states[i] = uclk_states[num_states - 1]; + if (clock_limits_available && uclk_states_available && num_states) update_bounding_box(dc, &dcn2_0_soc, &max_clocks, uclk_states, num_states); else if (clock_limits_available) -- 2.17.1