drm/amdgpu: don't do resets on APUs which don't support it

It can cause a hang.  This is normally not enabled for GPU
hangs on these asics, but was recently enabled for handling
aborted suspends.  This causes hangs on some platforms
on suspend.

Fixes: daf8de0874ab5b ("drm/amdgpu: always reset the asic in suspend (v2)")
Cc: stable@vger.kernel.org
Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1858
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/cik.c b/drivers/gpu/drm/amd/amdgpu/cik.c
index 54f28c0..f10ce74 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/cik.c
+++ b/drivers/gpu/drm/amd/amdgpu/cik.c
@@ -1428,6 +1428,10 @@ static int cik_asic_reset(struct amdgpu_device *adev)
 {
        int r;
 
+       /* APUs don't have full asic reset */
+       if (adev->flags & AMD_IS_APU)
+               return 0;
+
        if (cik_asic_reset_method(adev) == AMD_RESET_METHOD_BACO) {
                dev_info(adev->dev, "BACO reset\n");
                r = amdgpu_dpm_baco_reset(adev);

diff --git a/drivers/gpu/drm/amd/amdgpu/vi.c b/drivers/gpu/drm/amd/amdgpu/vi.c
index fe9a7cc..6645ebb 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/vi.c
+++ b/drivers/gpu/drm/amd/amdgpu/vi.c
@@ -956,6 +956,10 @@ static int vi_asic_reset(struct amdgpu_device *adev)
 {
        int r;
 
+       /* APUs don't have full asic reset */
+       if (adev->flags & AMD_IS_APU)
+               return 0;
+
        if (vi_asic_reset_method(adev) == AMD_RESET_METHOD_BACO) {
                dev_info(adev->dev, "BACO reset\n");
                r = amdgpu_dpm_baco_reset(adev);