Commit 2da2e952 authored by Timur Kristóf's avatar Timur Kristóf Committed by Alex Deucher
Browse files

drm/amdgpu: Use DC by default on SI dGPUs 



Now that DC supports analog connectors, it has reached feature
parity with the legacy non-DC display driver on SI dGPUs.
Use the DC display driver by default on SI dGPUs, unless it is
explicitly disabled using the amdgpu.dc=0 module parameter.

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

Also clarify the comment about what is missing to have full
DC support for CIK APUs.

Signed-off-by: default avatarTimur Kristóf <timur.kristof@gmail.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 237d623a

drivers/gpu/drm/amd/amdgpu/amdgpu_device.c

+2 −13
Original line number Diff line number Diff line
@@ -4249,24 +4249,13 @@ bool amdgpu_device_asic_has_dc_support(struct pci_dev *pdev, 
	case CHIP_PITCAIRN:

	case CHIP_VERDE:

	case CHIP_OLAND:

		/*

		 * We have systems in the wild with these ASICs that require

		 * LVDS and VGA support which is not supported with DC.

		 *

		 * Fallback to the non-DC driver here by default so as not to

		 * cause regressions.

		 */

#if defined(CONFIG_DRM_AMD_DC_SI)

		return amdgpu_dc > 0;

#else

		return false;

#endif

		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

		 * VGA support which is not supported with DC.

		 * 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.