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drm/amd/display: Do not add '-mhard-float' to dcn2{1,0}_resource.o for clang

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This patch is for linux-5.15.y and earlier only. It is functionally
equivalent to upstream commit 7db038d9790e ("drm/amd/display: Do not add
'-mhard-float' to dml_ccflags for clang"), which was created after all
files that require '-mhard-float' were moved under the dml folder. In
kernels older than 5.18, which do not contain upstream commits

  22f87d998326 ("drm/amd/display: move FPU operations from dcn21 to dml/dcn20 folder")
  cf689e869cf0 ("drm/amd/display: move FPU-related code from dcn20 to dml folder")

newer versions of clang error with

  clang: error: unsupported option '-mhard-float' for target 'x86_64-linux-gnu'
  make[6]: *** [scripts/Makefile.build:289: drivers/gpu/drm/amd/amdgpu/../display/dc/dcn20/dcn20_resource.o] Error 1
  clang: error: unsupported option '-mhard-float' for target 'x86_64-linux-gnu'
  make[6]: *** [scripts/Makefile.build:289: drivers/gpu/drm/amd/amdgpu/../display/dc/dcn21/dcn21_resource.o] Error 1

Apply a functionally equivalent change to prevent adding '-mhard-float'
with clang for these files.

Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Nathan Chancellor
2025-06-04 14:08:09 -07:00
committed by Greg Kroah-Hartman
parent 79a4fba715
commit 0c3939b002
2 changed files with 2 additions and 2 deletions
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2
drivers/gpu/drm/amd/display/dc/dcn20/Makefile
View File

@@ -10,7 +10,7 @@ DCN20 = dcn20_resource.o dcn20_init.o dcn20_hwseq.o dcn20_dpp.o dcn20_dpp_cm.o d
DCN20 += dcn20_dsc.o
ifdef CONFIG_X86
CFLAGS_$(AMDDALPATH)/dc/dcn20/dcn20_resource.o := -mhard-float -msse
CFLAGS_$(AMDDALPATH)/dc/dcn20/dcn20_resource.o := $(if $(CONFIG_CC_IS_GCC), -mhard-float) -msse
endif
ifdef CONFIG_PPC64

2
drivers/gpu/drm/amd/display/dc/dcn21/Makefile
View File

@@ -6,7 +6,7 @@ DCN21 = dcn21_init.o dcn21_hubp.o dcn21_hubbub.o dcn21_resource.o \
dcn21_hwseq.o dcn21_link_encoder.o
ifdef CONFIG_X86
CFLAGS_$(AMDDALPATH)/dc/dcn21/dcn21_resource.o := -mhard-float -msse
CFLAGS_$(AMDDALPATH)/dc/dcn21/dcn21_resource.o := $(if $(CONFIG_CC_IS_GCC), -mhard-float) -msse
endif
ifdef CONFIG_PPC64