linux-kernel - Re: [PATCH] drm: mediatek: mtk_disp_gamma: Fix breakage due to merge issue

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Message-ID: <fff2faef-6f3c-4009-840a-3ce83db90288@collabora.com>
Date:   Thu, 23 Nov 2023 10:56:15 +0100
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     chunkuang.hu@...nel.org
Cc:     p.zabel@...gutronix.de, airlied@...il.com, daniel@...ll.ch,
        matthias.bgg@...il.com, ck.hu@...iatek.com,
        nfraprado@...labora.com, dri-devel@...ts.freedesktop.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, kernel@...labora.com
Subject: Re: [PATCH] drm: mediatek: mtk_disp_gamma: Fix breakage due to merge
 issue

Il 25/10/23 12:49, AngeloGioacchino Del Regno ha scritto:
> While the commit that was sent to the mailing lists was fine, something
> happened during merge and the mtk_gamma_set() function got broken as
> a writel() was turned into a readl().
> 
> Fix that by changing that back to the expected writel().
> 
> Fixes: a6b39cd248f3 ("drm/mediatek: De-commonize disp_aal/disp_gamma gamma_set functions")
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>

This was a urgent patch one month ago, and it got ignored.

Friendly ping.

Regards,
Angelo

> ---
>   drivers/gpu/drm/mediatek/mtk_disp_gamma.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/mediatek/mtk_disp_gamma.c b/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> index 2fada9d6c95f..52c752bc5f41 100644
> --- a/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> +++ b/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> @@ -203,7 +203,7 @@ void mtk_gamma_set(struct device *dev, struct drm_crtc_state *state)
>   	/* Disable RELAY mode to pass the processed image */
>   	cfg_val &= ~GAMMA_RELAY_MODE;
>   
> -	cfg_val = readl(gamma->regs + DISP_GAMMA_CFG);
> +	writel(cfg_val, gamma->regs + DISP_GAMMA_CFG);
>   }
>   
>   void mtk_gamma_config(struct device *dev, unsigned int w,