linux-kernel - Re: [PATCH v8 15/18] drm/msm/a6xx: Use "else if" in GPU speedbin rev matching

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Date:   Thu, 15 Jun 2023 01:16:13 +0530
From:   Akhil P Oommen <quic_akhilpo@...cinc.com>
To:     Konrad Dybcio <konrad.dybcio@...aro.org>
CC:     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>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Conor Dooley <conor+dt@...nel.org>,
        <linux-arm-msm@...r.kernel.org>, <dri-devel@...ts.freedesktop.org>,
        <freedreno@...ts.freedesktop.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, Rob Clark <robdclark@...omium.org>,
        Marijn Suijten <marijn.suijten@...ainline.org>
Subject: Re: [PATCH v8 15/18] drm/msm/a6xx: Use "else if" in GPU speedbin rev
 matching

On Mon, May 29, 2023 at 03:52:34PM +0200, Konrad Dybcio wrote:
> 
> The GPU can only be one at a time. Turn a series of ifs into if +
> elseifs to save some CPU cycles.
> 
> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
> Signed-off-by: Konrad Dybcio <konrad.dybcio@...aro.org>

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

-Akhil
> ---
>  drivers/gpu/drm/msm/adreno/a6xx_gpu.c | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
> index 1a29e7dd9975..5faa85543428 100644
> --- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
> +++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
> @@ -2170,16 +2170,16 @@ static u32 fuse_to_supp_hw(struct device *dev, struct adreno_rev rev, u32 fuse)
>  	if (adreno_cmp_rev(ADRENO_REV(6, 1, 8, ANY_ID), rev))
>  		val = a618_get_speed_bin(fuse);
>  
> -	if (adreno_cmp_rev(ADRENO_REV(6, 1, 9, ANY_ID), rev))
> +	else if (adreno_cmp_rev(ADRENO_REV(6, 1, 9, ANY_ID), rev))
>  		val = a619_get_speed_bin(fuse);
>  
> -	if (adreno_cmp_rev(ADRENO_REV(6, 3, 5, ANY_ID), rev))
> +	else 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))
> +	else if (adreno_cmp_rev(ADRENO_REV(6, 4, 0, ANY_ID), rev))
>  		val = a640_get_speed_bin(fuse);
>  
> -	if (adreno_cmp_rev(ADRENO_REV(6, 5, 0, ANY_ID), rev))
> +	else if (adreno_cmp_rev(ADRENO_REV(6, 5, 0, ANY_ID), rev))
>  		val = a650_get_speed_bin(fuse);
>  
>  	if (val == UINT_MAX) {
> 
> -- 
> 2.40.1
>