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drm/amd/pm: make pp_features read-only when scpm is enabled

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commit 53c78ab388 upstream.

SCPM owns power feature control when enabled.

Make pp_features read-only during sysfs setup by clearing its write bits
and store callback.

Signed-off-by: Yang Wang <kevinyang.wang@amd.com>
Reviewed-by: Asad Kamal <asad.kamal@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 6a5786e191)
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Yang Wang
2026-08-03 11:22:05 +02:00
committed by Greg Kroah-Hartman
parent ada47af5c2
commit e75f71143b
1 changed files with 5 additions and 0 deletions
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drivers/gpu/drm/amd/pm/amdgpu_pm.c
+5
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@@ -2619,6 +2619,11 @@ static int default_attr_update(struct amdgpu_device *adev, struct amdgpu_device_
gc_ver != IP_VERSION(9, 4, 3)) ||
gc_ver < IP_VERSION(9, 0, 0))
*states = ATTR_STATE_UNSUPPORTED;
if (adev->scpm_enabled) {
dev_attr->attr.mode &= ~S_IWUGO;
dev_attr->store = NULL;
}
} else if (DEVICE_ATTR_IS(gpu_metrics)) {
if (gc_ver < IP_VERSION(9, 1, 0))
*states = ATTR_STATE_UNSUPPORTED;