drm/amdgpu: Use DC by default on CIK APUs

Now that DC supports external DP bridge encoders,
it has reached feature parity with the legacy non-DC display
driver on CIK APUs: Kaveri, Kabini, Mullins.

Use the DC display driver by default on SI APUs, unless it is
explicitly disabled using the amdgpu.dc=0 module parameter.

DC brings proper support for DP/HDMI audio, DP MST, VRR,
10-bit colors, some HDR features, atomic modesetting, etc.

Signed-off-by: Timur Kristóf <timur.kristof@gmail.com>
Reviewed-by: Alex Hung <alex.hung@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 820a0d7a1fdeb314c1688f23b86b654dd9109b34..0acddcb047300087bfb7053f74605a971022a3c8 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -4105,17 +4105,6 @@ bool amdgpu_device_asic_has_dc_support(struct pci_dev *pdev,
        case CHIP_VERDE:
        case CHIP_OLAND:
                return amdgpu_dc != 0 && IS_ENABLED(CONFIG_DRM_AMD_DC_SI);
-       case CHIP_KAVERI:
-       case CHIP_KABINI:
-       case CHIP_MULLINS:
-               /*
-                * We have systems in the wild with these ASICs that require
-                * TRAVIS and NUTMEG support which is not supported with DC.
-                *
-                * Fallback to the non-DC driver here by default so as not to
-                * cause regressions.
-                */
-               return amdgpu_dc > 0;
        default:
                return amdgpu_dc != 0;
 #else