linux-kernel - Re: [PATCH 3/7] drm/msm/a6xx: Add support for A640 speed binning

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Date:   Tue, 13 Dec 2022 12:36:59 +0530
From:   Akhil P Oommen <quic_akhilpo@...cinc.com>
To:     Konrad Dybcio <konrad.dybcio@...aro.org>,
        <linux-arm-msm@...r.kernel.org>, <andersson@...nel.org>,
        <agross@...nel.org>, <krzysztof.kozlowski@...aro.org>
CC:     <marijn.suijten@...ainline.org>, Rob Clark <robdclark@...il.com>,
        "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>, Chia-I Wu <olvaffe@...il.com>,
        Douglas Anderson <dianders@...omium.org>,
        <dri-devel@...ts.freedesktop.org>,
        <freedreno@...ts.freedesktop.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 3/7] drm/msm/a6xx: Add support for A640 speed binning

On 12/13/2022 5:54 AM, Konrad Dybcio wrote:
> Add support for matching QFPROM fuse values to get the correct speed bin
> on A640 (SM8150) GPUs.
>
> Signed-off-by: Konrad Dybcio <konrad.dybcio@...aro.org>
> ---
>  drivers/gpu/drm/msm/adreno/a6xx_gpu.c | 13 +++++++++++++
>  1 file changed, 13 insertions(+)
>
> diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
> index 36c8fb699b56..2c1630f0c04c 100644
> --- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
> +++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
> @@ -1877,6 +1877,16 @@ static u32 a619_get_speed_bin(u32 fuse)
>  	return UINT_MAX;
>  }
>  
> +static u32 a640_get_speed_bin(u32 fuse)
> +{
> +	if (fuse == 0)
> +		return 0;
> +	else if (fuse == 1)
> +		return 1;
> +
> +	return UINT_MAX;
> +}
> +
>  static u32 adreno_7c3_get_speed_bin(u32 fuse)
>  {
>  	if (fuse == 0)
> @@ -1902,6 +1912,9 @@ static u32 fuse_to_supp_hw(struct device *dev, struct adreno_rev rev, u32 fuse)
>  	if (adreno_cmp_rev(ADRENO_REV(6, 3, 5, ANY_ID), rev))
>  		val = adreno_7c3_get_speed_bin(fuse);
>  
> +	if (adreno_cmp_rev(ADRENO_REV(6, 4, 0, ANY_ID), rev))
> +		val = a640_get_speed_bin(fuse);
> +
>  	if (val == UINT_MAX) {
>  		DRM_DEV_ERROR(dev,
>  			"missing support for speed-bin: %u. Some OPPs may not be supported by hardware\n",

Reviewed-by: Akhil P Oommen <quic_akhilpo@...cinc.com>


-Akhil.