linux-kernel - Re: [PATCH] drm/msm/adreno: Drop WARN_ON from patchid lookup for new GPUs

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Message-ID: <CAF6AEGuS3PhNbh9Gmu1g9YpUcr3LOh1gZK-XBE+urdb5jRjorg@mail.gmail.com>
Date:   Mon, 23 Oct 2023 12:42:01 -0700
From:   Rob Clark <robdclark@...il.com>
To:     Konrad Dybcio <konrad.dybcio@...aro.org>
Cc:     Abhinav Kumar <quic_abhinavk@...cinc.com>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Sean Paul <sean@...rly.run>, David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        Rob Clark <robdclark@...omium.org>,
        linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Abel Vesa <abel.vesa@...aro.org>
Subject: Re: [PATCH] drm/msm/adreno: Drop WARN_ON from patchid lookup for new GPUs

On Mon, Oct 23, 2023 at 7:29 AM Konrad Dybcio <konrad.dybcio@...aro.org> wrote:
>
> New GPUs still use the lower 2 bytes of the chip id (in whatever form
> it comes) to signify silicon revision. Drop the warning that makes it
> sound as if that was unintended.
>
> Fixes: 90b593ce1c9e ("drm/msm/adreno: Switch to chip-id for identifying GPU")
> Signed-off-by: Konrad Dybcio <konrad.dybcio@...aro.org>
> ---
>  drivers/gpu/drm/msm/adreno/adreno_gpu.h | 5 -----
>  1 file changed, 5 deletions(-)
>
> diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.h b/drivers/gpu/drm/msm/adreno/adreno_gpu.h
> index 80b3f6312116..9a1ec42155fd 100644
> --- a/drivers/gpu/drm/msm/adreno/adreno_gpu.h
> +++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.h
> @@ -203,11 +203,6 @@ struct adreno_platform_config {
>
>  static inline uint8_t adreno_patchid(const struct adreno_gpu *gpu)
>  {
> -       /* It is probably ok to assume legacy "adreno_rev" format
> -        * for all a6xx devices, but probably best to limit this
> -        * to older things.
> -        */
> -       WARN_ON_ONCE(gpu->info->family >= ADRENO_6XX_GEN1);

Maybe just change it to ADRENO_6XX_GEN4?

BR,
-R

>         return gpu->chip_id & 0xff;
>  }
>
>
> ---
> base-commit: e8361b005d7c92997d12f2b85a9e4a525738bd9d
> change-id: 20231023-topic-adreno_warn-42a09bb4bf64
>
> Best regards,
> --
> Konrad Dybcio <konrad.dybcio@...aro.org>
>