diff options
| author | Ilya Bakoulin <Ilya.Bakoulin@amd.com> | 2021-04-26 14:27:38 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2021-05-10 18:10:49 -0400 |
| commit | c31bef1cb1203b26f901a511a3246204cfaf8a57 (patch) | |
| tree | 68af19ffec33060e5c94fc84ad4f8136104de60e /drivers/gpu/drm/amd/display/dc/dcn21 | |
| parent | ebc22cbdc058d474210343ec87955711546183ad (diff) | |
| download | lwn-c31bef1cb1203b26f901a511a3246204cfaf8a57.tar.gz lwn-c31bef1cb1203b26f901a511a3246204cfaf8a57.zip | |
drm/amd/display: Fix clock table filling logic
[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>
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/dcn21')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c | 33 |
1 files changed, 21 insertions, 12 deletions
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; } |