drm/amdgpu: consolidate atom scratch reg handling for hangs

Move from asic specific code to common atom code.

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 13 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
index 8e6bf548d689..76cbb1d08bce 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
@@ -1784,6 +1784,19 @@ void amdgpu_atombios_scratch_regs_restore(struct amdgpu_device *adev)
                 WREG32(mmBIOS_SCRATCH_0 + i, adev->bios_scratch[i]);
 }
 
+void amdgpu_atombios_scratch_regs_engine_hung(struct amdgpu_device *adev,
+                                              bool hung)
+{
+        u32 tmp = RREG32(mmBIOS_SCRATCH_3);
+
+        if (hung)
+                tmp |= ATOM_S3_ASIC_GUI_ENGINE_HUNG;
+        else
+                tmp &= ~ATOM_S3_ASIC_GUI_ENGINE_HUNG;
+
+        WREG32(mmBIOS_SCRATCH_3, tmp);
+}
+
 /* Atom needs data in little endian format
  * so swap as appropriate when copying data to
  * or from atom. Note that atom operates on