drm/amd/display: Don't build DCN1 when kcov is enabled

DCN1 contains code that utilizes fp math. When
CONFIG_KCOV_INSTRUMENT_ALL and CONFIG_KCOV_ENABLE_COMPARISONS are
enabled, build errors are found. See this earlier patch for details:

https://lists.freedesktop.org/archives/dri-devel/2018-August/186131.html

As a short term solution, disable CONFIG_DRM_AMD_DC_DCN1_0 when
KCOV_INSTRUMENT_ALL and KCOV_ENABLE_COMPARISONS are enabled. In
addition, make it a fully derived config, taking into account
CONFIG_X86.

Acked-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Leo (Sunpeng) Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 3 insertions, 5 deletions

diff --git a/drivers/gpu/drm/amd/display/Kconfig b/drivers/gpu/drm/amd/display/Kconfig
index 4c35625eb2c7..ed654a76c76a 100644
--- a/drivers/gpu/drm/amd/display/Kconfig
+++ b/drivers/gpu/drm/amd/display/Kconfig
@@ -4,18 +4,16 @@ menu "Display Engine Configuration"
 config DRM_AMD_DC
         bool "AMD DC - Enable new display engine"
         default y
+        select DRM_AMD_DC_DCN1_0 if X86 && !(KCOV_INSTRUMENT_ALL && KCOV_ENABLE_COMPARISONS)
         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_DCN1_0
-        bool "DCN 1.0 Raven family"
-        depends on DRM_AMD_DC && X86
-        default y
+        def_bool n
         help
-          Choose this option if you want to have
-          RV family for display engine
+          RV family support for display engine
 
 config DEBUG_KERNEL_DC
         bool "Enable kgdb break in DC"