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Subject: Re: [RFC v2 2/2] drm/amd/display: Use PPC FPU functions
To:     Christoph Hellwig <hch@infradead.org>
Cc:     Anson Jacob <Anson.Jacob@amd.com>, mpe@ellerman.id.au,
        benh@kernel.crashing.org, paulus@samba.org,
        christophe.leroy@csgroup.eu, linuxppc-dev@lists.ozlabs.org,
        amd-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org,
        Sunpeng.Li@amd.com, Harry.Wentland@amd.com, qingqing.zhuo@amd.com,
        Rodrigo.Siqueira@amd.com, roman.li@amd.com,
        Aurabindo.Pillai@amd.com, Bhawanpreet.Lakha@amd.com,
        bindu.r@amd.com
References: <20210721044801.840501-1-Anson.Jacob@amd.com>
 <20210721044801.840501-3-Anson.Jacob@amd.com>
 <9094cea1-602e-6e71-4ff7-c06fd04af6c5@amd.com>
 <YPfECUtD0SRCjrSm@infradead.org>
From:   =?UTF-8?Q?Christian_K=c3=b6nig?= <christian.koenig@amd.com>
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Date:   Wed, 21 Jul 2021 11:24:57 +0200
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Am 21.07.21 um 08:51 schrieb Christoph Hellwig:
> On Wed, Jul 21, 2021 at 08:29:43AM +0200, Christian K??nig wrote:
>> Looks good in general, but question is what about other architectures like
>> ARM?
> DRM_AMD_DC_DCN currently requires X86 || PPC64.

And exactly that's the problem I'm noting here. At least officially AMD 
claims that we support ARM and some very brave still use the hardware 
together with MIPS as well.

> Maybe a good think would be to add a new KERNEL_FPU_API Kconfig symbol,
> selected by x86 and powerpc (I think ppc32 should be fine too now) so
> that we get these arch dependencies out of the driver.

Good idea.

Christian.