From: Yang Wang Date: Wed, 1 Jul 2026 01:11:15 +0000 (+0800) Subject: drm/amd/pm: fix smu13 power limit range calculation X-Git-Tag: v7.2-rc2~10^2~2^2~3 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=220f22e1d66c1cfb63387eb1c4210f92a357c2d9;p=thirdparty%2Fkernel%2Flinux.git drm/amd/pm: fix smu13 power limit range calculation SMU13 reports SocketPowerLimitAc/Dc as the default power limit, but MsgLimits.Power may carry a different firmware bound for the same PPT throttler. Using only the socket limit for both min and max can therefore expose an incorrect power range. Keep the socket limit as the default, but derive the range from both values: use the lower value for the min base and the higher value for the max base before applying OD percentages. Keep the current limit query independent from the cap calculation. Fixes: 1eaf26db9590 ("drm/amd/pm: fix smu13 power limit default/cap calculation") Closes: https://gitlab.freedesktop.org/drm/amd/-/work_items/5419 Signed-off-by: Yang Wang Reviewed-by: Kenneth Feng Signed-off-by: Alex Deucher (cherry picked from commit f45bbf0f62f266ed8422d84f347d75d5fca846a7) Cc: stable@vger.kernel.org --- diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_0_ppt.c b/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_0_ppt.c index 7f8d4bb47d02..acbd7046d8a5 100644 --- a/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_0_ppt.c +++ b/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_0_ppt.c @@ -2403,11 +2403,14 @@ static int smu_v13_0_0_get_power_limit(struct smu_context *smu, uint32_t pp_limit = smu->adev->pm.ac_power ? skutable->SocketPowerLimitAc[PPT_THROTTLER_PPT0] : skutable->SocketPowerLimitDc[PPT_THROTTLER_PPT0]; - uint32_t power_limit = 0, od_percent_upper = 0, od_percent_lower = 0; + uint32_t msg_limit = skutable->MsgLimits.Power[PPT_THROTTLER_PPT0][POWER_SOURCE_AC]; + uint32_t min_limit = min_t(uint32_t, pp_limit, msg_limit); + uint32_t max_limit = max_t(uint32_t, pp_limit, msg_limit); + uint32_t od_percent_upper = 0, od_percent_lower = 0; int ret; if (current_power_limit) { - ret = smu_v13_0_get_current_power_limit(smu, &power_limit); + ret = smu_v13_0_get_current_power_limit(smu, current_power_limit); if (ret) *current_power_limit = pp_limit; } @@ -2430,12 +2433,12 @@ static int smu_v13_0_0_get_power_limit(struct smu_context *smu, od_percent_upper, od_percent_lower, pp_limit); if (max_power_limit) { - *max_power_limit = pp_limit * (100 + od_percent_upper); + *max_power_limit = max_limit * (100 + od_percent_upper); *max_power_limit /= 100; } if (min_power_limit) { - *min_power_limit = pp_limit * (100 - od_percent_lower); + *min_power_limit = min_limit * (100 - od_percent_lower); *min_power_limit /= 100; } diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_7_ppt.c b/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_7_ppt.c index 0f774b0920ce..42c9ceeb4f7d 100644 --- a/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_7_ppt.c +++ b/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_7_ppt.c @@ -2385,15 +2385,16 @@ static int smu_v13_0_7_get_power_limit(struct smu_context *smu, uint32_t pp_limit = smu->adev->pm.ac_power ? skutable->SocketPowerLimitAc[PPT_THROTTLER_PPT0] : skutable->SocketPowerLimitDc[PPT_THROTTLER_PPT0]; - uint32_t power_limit = 0, od_percent_upper = 0, od_percent_lower = 0; + uint32_t msg_limit = skutable->MsgLimits.Power[PPT_THROTTLER_PPT0][POWER_SOURCE_AC]; + uint32_t min_limit = min_t(uint32_t, pp_limit, msg_limit); + uint32_t max_limit = max_t(uint32_t, pp_limit, msg_limit); + uint32_t od_percent_upper = 0, od_percent_lower = 0; int ret; if (current_power_limit) { - ret = smu_v13_0_get_current_power_limit(smu, &power_limit); + ret = smu_v13_0_get_current_power_limit(smu, current_power_limit); if (ret) - power_limit = pp_limit; - - *current_power_limit = power_limit; + *current_power_limit = pp_limit; } if (default_power_limit) @@ -2414,12 +2415,12 @@ static int smu_v13_0_7_get_power_limit(struct smu_context *smu, od_percent_upper, od_percent_lower, pp_limit); if (max_power_limit) { - *max_power_limit = pp_limit * (100 + od_percent_upper); + *max_power_limit = max_limit * (100 + od_percent_upper); *max_power_limit /= 100; } if (min_power_limit) { - *min_power_limit = pp_limit * (100 - od_percent_lower); + *min_power_limit = min_limit * (100 - od_percent_lower); *min_power_limit /= 100; }