This patch is Reviewed-by: Felix Kuehling <[email protected]>

-----Original Message-----
From: amd-gfx [mailto:[email protected]] On Behalf Of Harry 
Wentland
Sent: Monday, October 02, 2017 11:50 AM
To: [email protected]
Cc: Wentland, Harry
Subject: [PATCH v2] drm/amd/display: Disable pre-Vega ASICs by default

v2: Fix up bad merge spotted by Felix

Signed-off-by: Harry Wentland <[email protected]>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 8 +++++---
 drivers/gpu/drm/amd/display/Kconfig        | 9 +++++++++
 2 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 24f6e3c1b114..58930d3bf0ff 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -1997,14 +1997,16 @@ bool amdgpu_device_asic_has_dc_support(enum 
amd_asic_type asic_type)
        case CHIP_POLARIS12:
        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;
-#endif
-#if defined(CONFIG_DRM_AMD_DC) && defined(CONFIG_DRM_AMD_DC_DCN1_0)
+       case CHIP_VEGA10:
+#if defined(CONFIG_DRM_AMD_DC_DCN1_0)
        case CHIP_RAVEN:
+#endif
                return amdgpu_dc != 0;
 #endif
        default:
diff --git a/drivers/gpu/drm/amd/display/Kconfig 
b/drivers/gpu/drm/amd/display/Kconfig
index 96a571f6d373..6d1086d0a277 100644
--- a/drivers/gpu/drm/amd/display/Kconfig
+++ b/drivers/gpu/drm/amd/display/Kconfig
@@ -3,11 +3,20 @@ 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 Polaris, Carrizo, Tonga, Bonaire,
+         and Hawaii.
+
 config DRM_AMD_DC_DCN1_0
        bool "DCN 1.0 Raven family"
        depends on DRM_AMD_DC && X86
-- 
2.11.0

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