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drm/amd/display: Enable building new display engine with KCOV enabled 

The new display engine uses floating point math, which is not supported
by KCOV. Commit 9d1d02ff36 ("drm/amd/display: Don't build DCN1 when kcov
is enabled") tried to work around the problem by disabling
CONFIG_DRM_AMD_DC_DCN if KCOV_INSTRUMENT_ALL and KCOV_ENABLE_COMPARISONS
are enabled. The result is that KCOV can not be enabled on systems which
require this display engine. A much simpler and less invasive solution is
to disable KCOV selectively when compiling the display enagine while
keeping it enabled for the rest of the kernel.

Fixes: 9d1d02ff36 ("drm/amd/display: Don't build DCN1 when kcov is enabled")
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Leo Li <sunpeng.li@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Guenter Roeck 2022-07-12 15:42:47 -07:00 committed by Alex Deucher
parent 958afce98c
commit 3876a8b5e2
2 changed files with 4 additions and 1 deletions
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2
drivers/gpu/drm/amd/display/Kconfig
View File

@ -6,7 +6,7 @@ config DRM_AMD_DC
bool "AMD DC - Enable new display engine"
default y
select SND_HDA_COMPONENT if SND_HDA_CORE
select DRM_AMD_DC_DCN if (X86 || PPC64) && !(KCOV_INSTRUMENT_ALL && KCOV_ENABLE_COMPARISONS)
select DRM_AMD_DC_DCN if (X86 || PPC64)
help
Choose this option if you want to use the new display engine
support for AMDGPU. This adds required support for Vega and

3
drivers/gpu/drm/amd/display/dc/Makefile
View File

@ -25,6 +25,9 @@
DC_LIBS = basics bios dml clk_mgr dce gpio irq link virtual
ifdef CONFIG_DRM_AMD_DC_DCN
KCOV_INSTRUMENT := n
DC_LIBS += dcn20
DC_LIBS += dsc
DC_LIBS += dcn10