[PATCH] Revert "drm/amd/display: add -msse2 to prevent Clang from emitting libcalls to undefined SW FP routines"

[Christian König]

Am 29.01.19 um 19:28 schrieb Wentland, Harry:
> On 2019-01-29 11:57 a.m., Alex Deucher wrote:
>> This reverts commit 10117450735c7a7c0858095fb46a860e7037cb9a.
>>
>> Causes a crash.
>>
>> Bug: https://bugs.freedesktop.org/show_bug.cgi?id=109487
>> Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
>> Cc: stable at vger.kernel.org # 4.19
> Thanks for finding and reverting.
>
> Reviewed-by: Harry Wentland <harry.wentland at amd.com>

Reviewed-by: Christian König <christian.koenig at amd.com>

I find it really troubling that we run into so many issues with that.

Christian.

>
> Harry
>
>> ---
>>   drivers/gpu/drm/amd/display/dc/calcs/Makefile | 2 +-
>>   drivers/gpu/drm/amd/display/dc/dml/Makefile   | 2 +-
>>   2 files changed, 2 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/amd/display/dc/calcs/Makefile b/drivers/gpu/drm/amd/display/dc/calcs/Makefile
>> index dc85a3c088af..95f332ee3e7e 100644
>> --- a/drivers/gpu/drm/amd/display/dc/calcs/Makefile
>> +++ b/drivers/gpu/drm/amd/display/dc/calcs/Makefile
>> @@ -30,7 +30,7 @@ else ifneq ($(call cc-option, -mstack-alignment=16),)
>>   	cc_stack_align := -mstack-alignment=16
>>   endif
>>   
>> -calcs_ccflags := -mhard-float -msse -msse2 $(cc_stack_align)
>> +calcs_ccflags := -mhard-float -msse $(cc_stack_align)
>>   
>>   CFLAGS_dcn_calcs.o := $(calcs_ccflags)
>>   CFLAGS_dcn_calc_auto.o := $(calcs_ccflags)
>> diff --git a/drivers/gpu/drm/amd/display/dc/dml/Makefile b/drivers/gpu/drm/amd/display/dc/dml/Makefile
>> index 33c7d7588712..d97ca6528f9d 100644
>> --- a/drivers/gpu/drm/amd/display/dc/dml/Makefile
>> +++ b/drivers/gpu/drm/amd/display/dc/dml/Makefile
>> @@ -30,7 +30,7 @@ else ifneq ($(call cc-option, -mstack-alignment=16),)
>>   	cc_stack_align := -mstack-alignment=16
>>   endif
>>   
>> -dml_ccflags := -mhard-float -msse -msse2 $(cc_stack_align)
>> +dml_ccflags := -mhard-float -msse $(cc_stack_align)
>>   
>>   CFLAGS_display_mode_lib.o := $(dml_ccflags)
>>   CFLAGS_display_pipe_clocks.o := $(dml_ccflags)
>>
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