linux-kernel - Re: [PATCH 2/5] drm/msm/adreno: Generate name from chipid for 7c3

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Date:   Tue, 22 Feb 2022 16:58:56 -0800
From:   Rob Clark <robdclark@...il.com>
To:     Akhil P Oommen <quic_akhilpo@...cinc.com>
Cc:     freedreno <freedreno@...ts.freedesktop.org>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS 
        <devicetree@...r.kernel.org>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Abhinav Kumar <quic_abhinavk@...cinc.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Christian König <christian.koenig@....com>,
        Daniel Vetter <daniel@...ll.ch>,
        David Airlie <airlied@...ux.ie>,
        Jonathan Marek <jonathan@...ek.ca>,
        Jordan Crouse <jordan@...micpenguin.net>,
        Sean Paul <sean@...rly.run>,
        Stephen Boyd <swboyd@...omium.org>,
        Vladimir Lypak <vladimir.lypak@...il.com>,
        Yangtao Li <tiny.windzz@...il.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/5] drm/msm/adreno: Generate name from chipid for 7c3

On Mon, Feb 21, 2022 at 6:41 AM Akhil P Oommen <quic_akhilpo@...cinc.com> wrote:
>
> Use a gpu name which is sprintf'ed from the chipid for 7c3 gpu instead of
> hardcoding one. This helps to avoid code churn in case of a gpu rename.
>
> Signed-off-by: Akhil P Oommen <quic_akhilpo@...cinc.com>
> ---
>
>  drivers/gpu/drm/msm/adreno/adreno_device.c |  1 -
>  drivers/gpu/drm/msm/adreno/adreno_gpu.c    | 14 ++++++++++++--
>  2 files changed, 12 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/msm/adreno/adreno_device.c b/drivers/gpu/drm/msm/adreno/adreno_device.c
> index fb26193..89cfd84 100644
> --- a/drivers/gpu/drm/msm/adreno/adreno_device.c
> +++ b/drivers/gpu/drm/msm/adreno/adreno_device.c
> @@ -318,7 +318,6 @@ static const struct adreno_info gpulist[] = {
>                 .hwcg = a660_hwcg,
>         }, {
>                 .rev = ADRENO_REV(6, 3, 5, ANY_ID),
> -               .name = "Adreno 7c Gen 3",
>                 .fw = {
>                         [ADRENO_FW_SQE] = "a660_sqe.fw",
>                         [ADRENO_FW_GMU] = "a660_gmu.bin",
> diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.c b/drivers/gpu/drm/msm/adreno/adreno_gpu.c
> index f33cfa4..158bbf7 100644
> --- a/drivers/gpu/drm/msm/adreno/adreno_gpu.c
> +++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.c
> @@ -929,12 +929,22 @@ int adreno_gpu_init(struct drm_device *drm, struct platform_device *pdev,
>         struct adreno_platform_config *config = dev->platform_data;
>         struct msm_gpu_config adreno_gpu_config  = { 0 };
>         struct msm_gpu *gpu = &adreno_gpu->base;
> +       struct adreno_rev *rev = &config->rev;
> +       const char *gpu_name;
> +       static char name[8];

I think 8 is not always enough.. but maybe just use devm_kasprintf()
to keep it simpler?

BR,
-R

>
>         adreno_gpu->funcs = funcs;
>         adreno_gpu->info = adreno_info(config->rev);
>         adreno_gpu->gmem = adreno_gpu->info->gmem;
>         adreno_gpu->revn = adreno_gpu->info->revn;
> -       adreno_gpu->rev = config->rev;
> +       adreno_gpu->rev = *rev;
> +
> +       gpu_name = adreno_gpu->info->name;
> +       if (!gpu_name) {
> +               sprintf(name, "%d.%d.%d.%d", rev->core, rev->major, rev->minor,
> +                               rev->patchid);
> +               gpu_name = name;
> +       }
>
>         adreno_gpu_config.ioname = "kgsl_3d0_reg_memory";
>
> @@ -948,7 +958,7 @@ int adreno_gpu_init(struct drm_device *drm, struct platform_device *pdev,
>         pm_runtime_enable(dev);
>
>         return msm_gpu_init(drm, pdev, &adreno_gpu->base, &funcs->base,
> -                       adreno_gpu->info->name, &adreno_gpu_config);
> +                       gpu_name, &adreno_gpu_config);
>  }
>
>  void adreno_gpu_cleanup(struct adreno_gpu *adreno_gpu)
> --
> 2.7.4
>