FAILED: patch "[PATCH] drm/amd/pm: hide pp_table sysfs on APUs" failed to apply to 6.6-stable tree

The patch below does not apply to the 6.6-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.6.y
git checkout FETCH_HEAD
git cherry-pick -x a65f5179d3f0c93da31b450aeb416eaa22f1912b
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<[email protected]>' --in-reply-to '2026080547-catsup-udder-fdfe@gregkh' --subject-prefix 'PATCH 6.6.y' 'HEAD^..'

Possible dependencies:

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From a65f5179d3f0c93da31b450aeb416eaa22f1912b Mon Sep 17 00:00:00 2001
From: Yang Wang <[email protected]>
Date: Wed, 29 Jul 2026 15:56:46 +0800
Subject: [PATCH] drm/amd/pm: hide pp_table sysfs on APUs

APUs use firmware-owned DPM tables and do not support replacement through pp_table. Generic callbacks can nevertheless expose the sysfs file and accept an upload before resetting the power management stack.

Treat pp_table as unsupported on APUs. Use the same platform check in the get and set paths to hide the file and reject uploads.

index 6d1ad4d5b8f0..e5e89294958a 100644
@@ -1183,6 +1183,13 @@ int amdgpu_dpm_dispatch_task(struct amdgpu_device *adev,
 	return ret;
 }
 
+static bool amdgpu_dpm_is_pp_table_allowed(struct amdgpu_device *adev)
+{
+	return !amdgpu_sriov_vf(adev) &&
+	       !(adev->flags & AMD_IS_APU) &&
+	       !adev->scpm_enabled;
+}
+
 int amdgpu_dpm_get_pp_table(struct amdgpu_device *adev, char *table,
 			    size_t size)
 {

@@ -1193,7 +1200,8 @@ int amdgpu_dpm_get_pp_table(struct amdgpu_device *adev, char *table,
 	if ((!table && size) || (table && !size))
 		return -EINVAL;
 
-	if (amdgpu_sriov_vf(adev) || !pp_funcs->get_pp_table || adev->scpm_enabled)
+	if (!amdgpu_dpm_is_pp_table_allowed(adev) ||
+	    !pp_funcs->get_pp_table)
 		return -EOPNOTSUPP;
 
 	mutex_lock(&adev->pm.mutex);

@@ -1717,7 +1725,8 @@ int amdgpu_dpm_set_pp_table(struct amdgpu_device *adev,
 	if (!buf || !size)
 		return -EINVAL;
 
-	if (amdgpu_sriov_vf(adev) || !pp_funcs->set_pp_table || adev->scpm_enabled)
+	if (!amdgpu_dpm_is_pp_table_allowed(adev) ||
+	    !pp_funcs->set_pp_table)
 		return -EOPNOTSUPP;
 
 	mutex_lock(&adev->pm.mutex);