[PATCH v3] drm/amd/display: Disable pre-Vega ASICs by default

[Harry Wentland]

v2: Clarify help text for pre-vega config
v3: Refer to older ASIC in more generic DCE 8,10,11 fashion

Signed-off-by: Harry Wentland <harry.wentland at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 2 ++
 drivers/gpu/drm/amd/display/Kconfig        | 8 ++++++++
 2 files changed, 10 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 34671790ce80..8c496a57788f 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -1995,7 +1995,9 @@ bool amdgpu_device_asic_has_dc_support(enum amd_asic_type asic_type)
 	case CHIP_TONGA:
 	case CHIP_FIJI:
 	case CHIP_VEGA10:
+#if defined(CONFIG_DRM_AMD_DC_PRE_VEGA)
 		return amdgpu_dc != 0;
+#endif
 	case CHIP_KABINI:
 	case CHIP_MULLINS:
 		return amdgpu_dc > 0;
diff --git a/drivers/gpu/drm/amd/display/Kconfig b/drivers/gpu/drm/amd/display/Kconfig
index e91b6e57cf03..1d1a5f807030 100644
--- a/drivers/gpu/drm/amd/display/Kconfig
+++ b/drivers/gpu/drm/amd/display/Kconfig
@@ -3,11 +3,19 @@ menu "Display Engine Configuration"
 
 config DRM_AMD_DC
 	bool "AMD DC - Enable new display engine
+	default y
 	help
 	  Choose this option if you want to use the new display engine
 	  support for AMDGPU. This adds required support for Vega and
 	  Raven ASICs.
 
+config DRM_AMD_DC_PRE_VEGA
+	bool "DC support for Polaris and older ASICs"
+	default n
+	help
+	  Choose this option to enable the new DC support for older asics
+	  by default. This includes DCE 8, 10, and 11.
+
 config DRM_AMD_DC_DCN1_0
 	bool "DCN 1.0 Raven family"
 	depends on DRM_AMD_DC && X86
-- 
2.11.0