[PATCH 6.1 278/609] drm/amd/pm: make pp_features read-only when scpm is enabled

6.1-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Yang Wang <[email protected]>

commit 53c78ab388bfc1a4d72e756815d0db0a842c812e 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 <[email protected]>
Reviewed-by: Asad Kamal <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>
(cherry picked from commit 6a5786e191fdce36c5db170e5209cf609e8f0087)
Cc: [email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
 drivers/gpu/drm/amd/pm/amdgpu_pm.c |    5 +++++
 1 file changed, 5 insertions(+)

--- a/drivers/gpu/drm/amd/pm/amdgpu_pm.c
+++ b/drivers/gpu/drm/amd/pm/amdgpu_pm.c
@@ -2004,6 +2004,11 @@ static int default_attr_update(struct am
 	} else if (DEVICE_ATTR_IS(pp_features)) {
 		if (adev->flags & AMD_IS_APU || 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;