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

Lazare, Jordan Jordan.Lazare at amd.com
Fri May 19 14:54:08 UTC 2017

Acked-by: Jordan Lazare <Jordan.Lazare at amd.com>

-----Original Message-----
From: amd-gfx [mailto:amd-gfx-bounces at lists.freedesktop.org] On Behalf Of Harry Wentland
Sent: Friday, May 19, 2017 10:01 AM
To: amd-gfx at lists.freedesktop.org
Cc: Wentland, Harry <Harry.Wentland at amd.com>; Daenzer, Michel <Michel.Daenzer at amd.com>; Laktyushkin, Dmytro <Dmytro.Laktyushkin at amd.com>; Deucher, Alexander <Alexander.Deucher at amd.com>; Cheng, Tony <Tony.Cheng at amd.com>; Koenig, Christian <Christian.Koenig at amd.com>
Subject: [PATCH] drm/amd/display: Limit DCN to x86 arch

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.


 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
             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
 BW_CALCS = dce_calcs.o bw_fixed.o custom_float.o

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