kernel/linux.git/drivers/gpu/drm/amd/pm/amdgpu_dpm.c, branch v6.18.22

drm/amd/pm: fix race in power state check before mutex lock

2026-02-06T15:57:35+00:00

[ Upstream commit ee8d07cd5730038e33bf5e551448190bbd480eb8 ] The power state check in amdgpu_dpm_set_powergating_by_smu() is done before acquiring the pm mutex, leading to a race condition where: 1. Thread A checks state and thinks no change is needed 2. Thread B acquires mutex and modifies the state 3. Thread A returns without updating state, causing inconsistency Fix this by moving the mutex lock before the power state check, ensuring atomicity of the state check and modification. Fixes: 6ee27ee27ba8 ("drm/amd/pm: avoid duplicate powergate/ungate setting") Signed-off-by: Yang Wang Reviewed-by: Kenneth Feng Signed-off-by: Alex Deucher (cherry picked from commit 7a3fbdfd19ec5992c0fc2d0bd83888644f5f2f38) Signed-off-by: Sasha Levin

drm/amdgpu: Drop PMFW RLC notifier from amdgpu_device_suspend()

2025-11-04T18:28:20+00:00

For S3 on vangogh, PMFW needs to be notified before the driver powers down RLC. This already happens in smu_disable_dpms() so drop the superfluous call in amdgpu_device_suspend(). Co-developed-by: Mario Limonciello (AMD) Reviewed-by: Alex Deucher Signed-off-by: Mario Limonciello (AMD) Signed-off-by: Alex Deucher (cherry picked from commit 960e30a61e1a7ca5341a6cf9481e770e1cda24aa)

drm/amd/pm: Add VCN reset support check capability

2025-08-15T17:04:25+00:00

This change introduces infrastructure to check whether VCN reset is supported by the SMU firmware. Key changes include: 1. Added new functions to query VCN reset support: - amdgpu_dpm_reset_vcn_is_supported() - smu_reset_vcn_is_supported() - pptable_funcs.reset_vcn_is_supported callback 2. Implemented proper locking in the DPM layer with mutex protection 3. Maintained consistency with existing SDMA reset support checks The new capability allows callers to check for VCN reset support before attempting the operation, preventing unnecessary attempts on unsupported platforms. v2: clean up debug info(Alex) Suggested-by: Alex Deucher Signed-off-by: Ruili Ji Signed-off-by: Jesse Zhang Reviewed-by: Lijo Lazar Signed-off-by: Alex Deucher

drm/amdgpu: Generate BP threshold exceed CPER once threshold exceeded

2025-08-06T18:21:01+00:00

The bad pages threshold exceed CPER should be generated once threshold exceeded, no matter the bad_page_threshold setted or not. Signed-off-by: Xiang Liu Reviewed-by: Hawking Zhang Signed-off-by: Alex Deucher

drm/amd/pm: Add dpm interface for temp metrics

2025-08-06T18:20:34+00:00

Add dpm interface to get gpuboard/baseboard temperature metrics v2: Add temperature metrics support check(Lijo) v3: Return error code in case of operation not supported(Lijo) Signed-off-by: Asad Kamal Reviewed-by: Lijo Lazar Signed-off-by: Alex Deucher

drm/amd/pm: Add support to set min ISP clocks

2025-06-24T14:02:44+00:00

Add support to set ISP clocks for SMU v14.0.0. ISP driver uses amdgpu_dpm_set_soft_freq_range() API to set clocks via SMU interface than communicating with PMFW directly. amdgpu_dpm_set_soft_freq_range() is updated to take in any pp_clock_type than limiting to support only PP_SCLK to allow ISP and other driver modules to set the min/max clocks. Any clock specific restrictions are expected to be taken care in SOC specific SMU implementations instead of generic amdgpu_dpm and amdgpu_smu interfaces. Reviewed-by: Xiaojian Du Reviewed-by: Lijo Lazar Reviewed-by: Mario Limonciello Signed-off-by: Pratap Nirujogi Signed-off-by: Alex Deucher

drm/amd/pm: Add support to set ISP Power

2025-06-24T14:02:36+00:00

Add support to set ISP power for SMU v14.0.0. ISP driver uses amdgpu_dpm_set_powergating_by_smu() API to enable / disable power via SMU interface than communicating with PMFW directly. Reviewed-by: Lijo Lazar Reviewed-by: Mario Limonciello Signed-off-by: Pratap Nirujogi Signed-off-by: Alex Deucher

drm/amdgpu: disable workload profile switching when OD is enabled

2025-06-03T19:04:24+00:00

Users have reported that they have to reduce the level of undervolting to acheive stability when dynamic workload profiles are enabled on GC 10.3.x. Disable dynamic workload profiles if the user has enabled OD. Fixes: b9467983b774 ("drm/amdgpu: add dynamic workload profile switching for gfx10") Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/4262 Reviewed-by: Kenneth Feng Signed-off-by: Alex Deucher Cc: stable@vger.kernel.org # 6.15.x

drm/amd/pm: Add support to query partition metrics

2025-05-22T16:01:33+00:00

Add interfaces to query compute partition related metrics data. Signed-off-by: Lijo Lazar Reviewed-by: Asad Kamal Reviewed-by: Hawking Zhang Signed-off-by: Alex Deucher

drm/amdgpu/pm: add workload profile pause helper

2025-04-08T20:05:17+00:00

To be used for display idle optimizations when we want to pause non-default profiles. Reviewed-by: Kenneth Feng Signed-off-by: Alex Deucher