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drm/amd/pm: Enable user min/max gfxclk on aldebaran 

Aldebaran has fine grained DPM for GFXCLK. Instead of a discrete level,
user can specify a min/max range of GFXCLK for any profiling/tuning
purpose.This option is available only in manual performance level mode.
Select "manual" as power_dpm_force_performance_level and specify the
min/max range using pp_dpm_sclk sysfs node. User cannot specify a min/max
range outside of the default min/max range of the ASIC. If specified
outside the range, values will be bound by the default min/max range.

Ex: To use gfxclk min = 600MHz and max = 900MHz

echo manual > /sys/bus/pci/devices/.../power_dpm_force_performance_level
echo min 600 max 900 > /sys/bus/pci/devices/.../pp_dpm_sclk

Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Lijo Lazar 2021-02-04 18:51:32 +08:00 committed by Alex Deucher
parent 2bb8ac8568
commit 65ec7c08c1
1 changed files with 8 additions and 1 deletions
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9
drivers/gpu/drm/amd/pm/swsmu/smu13/aldebaran_ppt.c
View File

@ -1143,9 +1143,16 @@ static int aldebaran_set_soft_freq_limited_range(struct smu_context *smu,
if (clk_type != SMU_GFXCLK && clk_type != SMU_SCLK)
return -EINVAL;
if (smu_dpm->dpm_level != AMD_DPM_FORCED_LEVEL_PERF_DETERMINISM)
if ((smu_dpm->dpm_level != AMD_DPM_FORCED_LEVEL_MANUAL)
&& (smu_dpm->dpm_level != AMD_DPM_FORCED_LEVEL_PERF_DETERMINISM))
return -EINVAL;
if (smu_dpm->dpm_level == AMD_DPM_FORCED_LEVEL_MANUAL) {
min_clk = max(min, dpm_context->dpm_tables.gfx_table.min);
max_clk = min(max, dpm_context->dpm_tables.gfx_table.max);
return smu_v13_0_set_soft_freq_limited_range(smu, SMU_GFXCLK, min_clk, max_clk);
}
if (smu_dpm->dpm_level == AMD_DPM_FORCED_LEVEL_PERF_DETERMINISM) {
if (!max || (max < dpm_context->dpm_tables.gfx_table.min) ||
(max > dpm_context->dpm_tables.gfx_table.max)) {