drm/amdgpu:Add error message when register failed to reach expected value

Add error message when register failed to reach expected value, It will
help discover potential issue.

Signed-off-by: James Zhu <James.Zhu@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/soc15_common.h b/drivers/gpu/drm/amd/amdgpu/soc15_common.h
index 0942f492d2e19379eedbaf818363fe534922b99c..f5d602540673015c5e12390d9adce39cb24994dc 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/soc15_common.h
+++ b/drivers/gpu/drm/amd/amdgpu/soc15_common.h
@@ -56,6 +56,8 @@
                        tmp_ = RREG32(adev->reg_offset[ip##_HWIP][inst][reg##_BASE_IDX] + reg); \
                        loop--;                                 \
                        if (!loop) {                            \
+                               DRM_ERROR("Register(%d) [%s] failed to reach value 0x%08x != 0x%08x\n", \
+                                                       inst, #reg, expected_value, (tmp_ & (mask))); \
                                ret = -ETIMEDOUT;               \
                                break;                          \
                        }                                       \