linux-kernel - Re: [PATCH] drm/msm/a690: Switch to a660

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Date:   Fri, 11 Aug 2023 18:31:13 +0200
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Rob Clark <robdclark@...il.com>
Cc:     dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org,
        linux-arm-msm@...r.kernel.org, Rob Clark <robdclark@...omium.org>,
        Abhinav Kumar <quic_abhinavk@...cinc.com>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Sean Paul <sean@...rly.run>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Johan Hovold <johan+linaro@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] drm/msm/a690: Switch to a660_gmu.bin

On 11.08.2023 18:21, Rob Clark wrote:
> On Fri, Aug 11, 2023 at 9:11 AM Konrad Dybcio <konrad.dybcio@...aro.org> wrote:
>>
>> On 11.08.2023 18:09, Rob Clark wrote:
>>> On Fri, Aug 11, 2023 at 9:05 AM Rob Clark <robdclark@...il.com> wrote:
>>>>
>>>> From: Rob Clark <robdclark@...omium.org>
>>>>
>>>> There isn't actually a a690_gmu.bin.  But it appears that the normal
>>>> a660_gmu.bin works fine.  Normally all the devices within a sub-
>>>> generation (or "family") will use the same fw, and a690 is in the a660
>>>> family.
>>>>
>>>
>>> possibly this could be considered as:
>>>
>>> Fixes: 5e7665b5e484 ("drm/msm/adreno: Add Adreno A690 support")
>> For a lack of a better response, "meh"
> 
> It would help route the change back to 6.4.y so we can stop explaining
> to folks that they should create a symlink ;-)
Ok fair!

> 
>> Other than that:
>>
>> Reviewed-by: Konrad Dybcio <konrad.dybcio@...aro.org>
>>
>> Perhaps we could take this further and do something like
>>
>> if (failed to load gmu fw)
>>         try loading "gmu.bin"
> 
> that (loading random fw) sounds like a bad idea.. plus gmu.bin doesn't exist
I guess we still should hear from Qualcomm on this one, but I
do believe that "aXYZ_gmu.bin" is really "gmu firmware, tagged
at aXYZ release". They're even versioned and adreno-gpulist.h
downstream contains the minimum version for each SKU.

Konrad