[PATCH 03/19] drm/amd/display: Limit DCN to x86 arch

[Alex Deucher]

On Thu, Jun 1, 2017 at 12:15 AM, zhoucm1 <david1.zhou at amd.com> wrote:
>
>
> On 2017年05月31日 23:52, Harry Wentland wrote:
>>
>> DCN bw calcs currently rely on the following gcc options:
>>    -mhard-float -msse -mpreferred-stack-boundary=4
>>
>> We probably shouldn't really try building this on architectures
>> other than x86.
>
> Does it mean our card including DCN cannot run on other platform like ARM?

The only DCN asics at the moment are APUs so they are only x86.

Alex

>
> Regards,
> David Zhou
>>
>>
>> Change-Id: I63d214b2f6fe9b3fc0d59bd00563e0543f0baa8c
>> 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>
>> Reviewed-by: Tony Cheng <Tony.Cheng at amd.com>
>> Acked-by: Harry Wentland <Harry.Wentland at amd.com>
>> ---
>>   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
>>
>
>
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