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>

diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu13/aldebaran_ppt.c b/drivers/gpu/drm/amd/pm/swsmu/smu13/aldebaran_ppt.c
index 7bf8316b9816b281dea195cc95162ac6049ae400..befc117a25ef83720216207dec1b50b15b95bb8a 100644 (file)
--- a/drivers/gpu/drm/amd/pm/swsmu/smu13/aldebaran_ppt.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/smu13/aldebaran_ppt.c
@@ -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)) {