[PATCH] drm/amd/display: Limit DCN to x86 arch

[Harry Wentland]

DCN bw calcs currently rely on the following gcc options:
  -mhard-float -msse -mpreferred-stack-boundary=4

We probably shouldn't allow building this on architectures
other than x86.

CC: Alex Deucher <Alexander.Deucher at amd.com>
CC: Christian König <christian.koenig at amd.com>
CC: Michel Dänzer <michel.daenzer at amd.com>
CC: Tony Cheng <Tony.Cheng at amd.com>
CC: Dmytro Laktyushkin <Dmytro.Laktyushkin at amd.com>
Signed-off-by: Harry Wentland <harry.wentland at amd.com>
---

Tested this change by running make menuconfig and make modules with
ARCH=arm.

Harry

 drivers/gpu/drm/amd/display/Kconfig           | 2 +-
 drivers/gpu/drm/amd/display/dc/calcs/Makefile | 2 ++
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/Kconfig b/drivers/gpu/drm/amd/display/Kconfig
index 2b8d77cebe03..62ea9f600374 100644
--- a/drivers/gpu/drm/amd/display/Kconfig
+++ b/drivers/gpu/drm/amd/display/Kconfig
@@ -11,7 +11,7 @@ config DRM_AMD_DC
 
 config DRM_AMD_DC_DCN1_0
         bool "DCN 1.0 Raven family"
-        depends on DRM_AMD_DC
+        depends on DRM_AMD_DC && X86
         help
             Choose this option if you want to have
             RV family for display engine
diff --git a/drivers/gpu/drm/amd/display/dc/calcs/Makefile b/drivers/gpu/drm/amd/display/dc/calcs/Makefile
index a095472bf4b5..2e4ce0918c02 100644
--- a/drivers/gpu/drm/amd/display/dc/calcs/Makefile
+++ b/drivers/gpu/drm/amd/display/dc/calcs/Makefile
@@ -3,9 +3,11 @@
 # It calculates Bandwidth and Watermarks values for HW programming
 #
 
+ifeq ($(ARCH),x86)
 CFLAGS_dcn_calcs.o := -mhard-float -msse -mpreferred-stack-boundary=4
 CFLAGS_dcn_calc_auto.o := -mhard-float -msse -mpreferred-stack-boundary=4
 CFLAGS_dcn_calc_math.o := -mhard-float -msse -mpreferred-stack-boundary=4
+endif
 
 BW_CALCS = dce_calcs.o bw_fixed.o custom_float.o
 
-- 
2.11.0