drm/amdgpu: log when amdgpu.dc=1 but ASIC is unsupported

This makes it easier to figure out whether the kernel parameter has been
taken into account.

Signed-off-by: Simon Ser <contact@emersion.fr>
Cc: Harry Wentland <hwentlan@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 95988ff..a979468 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -2636,6 +2636,9 @@ bool amdgpu_device_asic_has_dc_support(enum amd_asic_type asic_type)
                return amdgpu_dc != 0;
 #endif
        default:
+               if (amdgpu_dc > 0)
+                       DRM_INFO("Display Core has been requested via kernel parameter "
+                                        "but isn't supported by ASIC, ignoring\n");
                return false;
        }
 }