From: Ilya Bakoulin Ilya.Bakoulin@amd.com
[ Upstream commit c31bef1cb1203b26f901a511a3246204cfaf8a57 ]
[Why] Currently, the code that fills the clock table can miss filling information about some of the higher voltage states advertised by the SMU. This, in turn, may cause some of the higher pixel clock modes (e.g. 8k60) to fail validation.
[How] Fill the table with one entry per DCFCLK level instead of one entry per FCLK level. This is needed because the maximum FCLK does not necessarily need maximum voltage, whereas DCFCLK values from SMU cover the full voltage range.
Signed-off-by: Ilya Bakoulin Ilya.Bakoulin@amd.com Reviewed-by: Dmytro Laktyushkin Dmytro.Laktyushkin@amd.com Acked-by: Stylon Wang stylon.wang@amd.com Tested-by: Daniel Wheeler daniel.wheeler@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com Signed-off-by: Sasha Levin sashal@kernel.org --- .../amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c | 80 ++++++++++++------- .../drm/amd/display/dc/dcn21/dcn21_resource.c | 33 +++++--- 2 files changed, 74 insertions(+), 39 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c index 49d19fdd750b..1f56ceab5922 100644 --- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c +++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c @@ -834,46 +834,67 @@ static struct wm_table lpddr4_wm_table_rn = { }, } }; -static unsigned int find_socclk_for_voltage(struct dpm_clocks *clock_table, unsigned int voltage) + +static unsigned int find_max_fclk_for_voltage(struct dpm_clocks *clock_table, + unsigned int voltage) { int i; + uint32_t max_clk = 0;
- for (i = 0; i < PP_SMU_NUM_SOCCLK_DPM_LEVELS; i++) { - if (clock_table->SocClocks[i].Vol == voltage) - return clock_table->SocClocks[i].Freq; + for (i = 0; i < PP_SMU_NUM_FCLK_DPM_LEVELS; i++) { + if (clock_table->FClocks[i].Vol <= voltage) { + max_clk = clock_table->FClocks[i].Freq > max_clk ? + clock_table->FClocks[i].Freq : max_clk; + } }
- ASSERT(0); - return 0; + return max_clk; } -static unsigned int find_dcfclk_for_voltage(struct dpm_clocks *clock_table, unsigned int voltage) + +static unsigned int find_max_memclk_for_voltage(struct dpm_clocks *clock_table, + unsigned int voltage) { int i; + uint32_t max_clk = 0;
- for (i = 0; i < PP_SMU_NUM_DCFCLK_DPM_LEVELS; i++) { - if (clock_table->DcfClocks[i].Vol == voltage) - return clock_table->DcfClocks[i].Freq; + for (i = 0; i < PP_SMU_NUM_MEMCLK_DPM_LEVELS; i++) { + if (clock_table->MemClocks[i].Vol <= voltage) { + max_clk = clock_table->MemClocks[i].Freq > max_clk ? + clock_table->MemClocks[i].Freq : max_clk; + } }
- ASSERT(0); - return 0; + return max_clk; +} + +static unsigned int find_max_socclk_for_voltage(struct dpm_clocks *clock_table, + unsigned int voltage) +{ + int i; + uint32_t max_clk = 0; + + for (i = 0; i < PP_SMU_NUM_SOCCLK_DPM_LEVELS; i++) { + if (clock_table->SocClocks[i].Vol <= voltage) { + max_clk = clock_table->SocClocks[i].Freq > max_clk ? + clock_table->SocClocks[i].Freq : max_clk; + } + } + + return max_clk; }
static void rn_clk_mgr_helper_populate_bw_params(struct clk_bw_params *bw_params, struct dpm_clocks *clock_table, struct integrated_info *bios_info) { int i, j = 0; + unsigned int volt;
j = -1;
- ASSERT(PP_SMU_NUM_FCLK_DPM_LEVELS <= MAX_NUM_DPM_LVL); - - /* Find lowest DPM, FCLK is filled in reverse order*/ - - for (i = PP_SMU_NUM_FCLK_DPM_LEVELS - 1; i >= 0; i--) { - if (clock_table->FClocks[i].Freq != 0 && clock_table->FClocks[i].Vol != 0) { + /* Find max DPM */ + for (i = 0; i < PP_SMU_NUM_DCFCLK_DPM_LEVELS; ++i) { + if (clock_table->DcfClocks[i].Freq != 0 && + clock_table->DcfClocks[i].Vol != 0) j = i; - break; - } }
if (j == -1) { @@ -884,13 +905,18 @@ static void rn_clk_mgr_helper_populate_bw_params(struct clk_bw_params *bw_params
bw_params->clk_table.num_entries = j + 1;
- for (i = 0; i < bw_params->clk_table.num_entries; i++, j--) { - bw_params->clk_table.entries[i].fclk_mhz = clock_table->FClocks[j].Freq; - bw_params->clk_table.entries[i].memclk_mhz = clock_table->MemClocks[j].Freq; - bw_params->clk_table.entries[i].voltage = clock_table->FClocks[j].Vol; - bw_params->clk_table.entries[i].dcfclk_mhz = find_dcfclk_for_voltage(clock_table, clock_table->FClocks[j].Vol); - bw_params->clk_table.entries[i].socclk_mhz = find_socclk_for_voltage(clock_table, - bw_params->clk_table.entries[i].voltage); + for (i = 0; i < bw_params->clk_table.num_entries; i++) { + volt = clock_table->DcfClocks[i].Vol; + + bw_params->clk_table.entries[i].voltage = volt; + bw_params->clk_table.entries[i].dcfclk_mhz = + clock_table->DcfClocks[i].Freq; + bw_params->clk_table.entries[i].fclk_mhz = + find_max_fclk_for_voltage(clock_table, volt); + bw_params->clk_table.entries[i].memclk_mhz = + find_max_memclk_for_voltage(clock_table, volt); + bw_params->clk_table.entries[i].socclk_mhz = + find_max_socclk_for_voltage(clock_table, volt); }
bw_params->vram_type = bios_info->memory_type; diff --git a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c index 8e3f1d0b4cc3..38a2aa87f5f5 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c +++ b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c @@ -1575,10 +1575,12 @@ static struct _vcs_dpi_voltage_scaling_st construct_low_pstate_lvl(struct clk_li low_pstate_lvl.phyclk_d18_mhz = dcn2_1_soc.clock_limits[high_voltage_lvl].phyclk_d18_mhz; low_pstate_lvl.phyclk_mhz = dcn2_1_soc.clock_limits[high_voltage_lvl].phyclk_mhz;
- for (i = clk_table->num_entries; i > 1; i--) - clk_table->entries[i] = clk_table->entries[i-1]; - clk_table->entries[1] = clk_table->entries[0]; - clk_table->num_entries++; + if (clk_table->num_entries < MAX_NUM_DPM_LVL) { + for (i = clk_table->num_entries; i > 1; i--) + clk_table->entries[i] = clk_table->entries[i-1]; + clk_table->entries[1] = clk_table->entries[0]; + clk_table->num_entries++; + }
return low_pstate_lvl; } @@ -1610,10 +1612,6 @@ static void update_bw_bounding_box(struct dc *dc, struct clk_bw_params *bw_param } }
- /* clk_table[1] is reserved for min DF PState. skip here to fill in later. */ - if (i == 1) - k++; - clock_limits[k].state = k; clock_limits[k].dcfclk_mhz = clk_table->entries[i].dcfclk_mhz; clock_limits[k].fabricclk_mhz = clk_table->entries[i].fclk_mhz; @@ -1630,14 +1628,25 @@ static void update_bw_bounding_box(struct dc *dc, struct clk_bw_params *bw_param
k++; } - for (i = 0; i < clk_table->num_entries + 1; i++) - dcn2_1_soc.clock_limits[i] = clock_limits[i]; + + if (clk_table->num_entries >= MAX_NUM_DPM_LVL) { + for (i = 0; i < clk_table->num_entries + 1; i++) + dcn2_1_soc.clock_limits[i] = clock_limits[i]; + } else { + dcn2_1_soc.clock_limits[0] = clock_limits[0]; + for (i = 2; i < clk_table->num_entries + 1; i++) { + dcn2_1_soc.clock_limits[i] = clock_limits[i - 1]; + dcn2_1_soc.clock_limits[i].state = i; + } + } + if (clk_table->num_entries) { - dcn2_1_soc.num_states = clk_table->num_entries + 1; /* fill in min DF PState */ dcn2_1_soc.clock_limits[1] = construct_low_pstate_lvl(clk_table, closest_clk_lvl); + dcn2_1_soc.num_states = clk_table->num_entries; /* duplicate last level */ - dcn2_1_soc.clock_limits[dcn2_1_soc.num_states] = dcn2_1_soc.clock_limits[dcn2_1_soc.num_states - 1]; + dcn2_1_soc.clock_limits[dcn2_1_soc.num_states] = + dcn2_1_soc.clock_limits[dcn2_1_soc.num_states - 1]; dcn2_1_soc.clock_limits[dcn2_1_soc.num_states].state = dcn2_1_soc.num_states; }