drm/amdgpu: fix to clear ASIC INIT COMPLETE bit on resuming phase
ASIC_INIT_COMPLETE bit must be cleared during S3 resuming phase,
because VBIOS will check the bit to decide if execute ASIC_Init
posting via kernel driver.
Signed-off-by: Huang Rui <ray.huang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
index ad43299..1cf78f4 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
@@ -1727,6 +1727,12 @@ void amdgpu_atombios_scratch_regs_restore(struct amdgpu_device *adev)
{
int i;
+ /*
+ * VBIOS will check ASIC_INIT_COMPLETE bit to decide if
+ * execute ASIC_Init posting via driver
+ */
+ adev->bios_scratch[7] &= ~ATOM_S7_ASIC_INIT_COMPLETE_MASK;
+
for (i = 0; i < AMDGPU_BIOS_NUM_SCRATCH; i++)
WREG32(mmBIOS_SCRATCH_0 + i, adev->bios_scratch[i]);
}