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drm/amd/pm: fix smu v13 soft clock frequency setting issue

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v1:
resolve the issue where some freq frequencies cannot be set correctly
due to insufficient floating-point precision.

v2:
patch this convert on 'max' value only.

Signed-off-by: Yang Wang <kevinyang.wang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 6194f60c70)
Cc: stable@vger.kernel.org
This commit is contained in:
Yang Wang 2026-01-21 11:04:06 +08:00 committed by Alex Deucher
parent 63804fed14
commit c764b7af15
2 changed files with 2 additions and 0 deletions
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1
drivers/gpu/drm/amd/pm/swsmu/inc/smu_v13_0.h
View File

@ -56,6 +56,7 @@
#define SMUQ10_TO_UINT(x) ((x) >> 10)
#define SMUQ10_FRAC(x) ((x) & 0x3ff)
#define SMUQ10_ROUND(x) ((SMUQ10_TO_UINT(x)) + ((SMUQ10_FRAC(x)) >= 0x200))
#define SMU_V13_SOFT_FREQ_ROUND(x) ((x) + 1)
extern const int pmfw_decoded_link_speed[5];
extern const int pmfw_decoded_link_width[7];

1
drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0.c
View File

@ -1555,6 +1555,7 @@ int smu_v13_0_set_soft_freq_limited_range(struct smu_context *smu,
return clk_id;
if (max > 0) {
max = SMU_V13_SOFT_FREQ_ROUND(max);
if (automatic)
param = (uint32_t)((clk_id << 16) | 0xffff);
else