linux-kernel - Re: [PATCH v10 01/16] drm/mediatek: gamma: Adjust mtk_drm_gamma_set

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Message-ID: <2ca106886fb0c990dd398bfa95012492dc3f6c13.camel@mediatek.com>
Date:   Thu, 12 Oct 2023 07:51:40 +0000
From:   CK Hu (胡俊光) <ck.hu@...iatek.com>
To:     "angelogioacchino.delregno@...labora.com" 
        <angelogioacchino.delregno@...labora.com>,
        "chunkuang.hu@...nel.org" <chunkuang.hu@...nel.org>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-mediatek@...ts.infradead.org" 
        <linux-mediatek@...ts.infradead.org>,
        "wenst@...omium.org" <wenst@...omium.org>,
        Jason-JH Lin (林睿祥) 
        <Jason-JH.Lin@...iatek.com>,
        "kernel@...labora.com" <kernel@...labora.com>,
        "daniel@...ll.ch" <daniel@...ll.ch>,
        "p.zabel@...gutronix.de" <p.zabel@...gutronix.de>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        "amergnat@...libre.com" <amergnat@...libre.com>,
        "airlied@...il.com" <airlied@...il.com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "matthias.bgg@...il.com" <matthias.bgg@...il.com>,
        "ehristev@...labora.com" <ehristev@...labora.com>
Subject: Re: [PATCH v10 01/16] drm/mediatek: gamma: Adjust
 mtk_drm_gamma_set_common parameters

Hi, Angelo:

On Fri, 2023-08-04 at 09:28 +0200, AngeloGioacchino Del Regno wrote:
> From: "Jason-JH.Lin" <jason-jh.lin@...iatek.com>
> 
> Adjust the parameters in mtk_drm_gamma_set_common()
>   - add (struct device *dev) to get lut_diff from gamma's driver data
>   - remove (bool lut_diff) and use false as default value in the
> function

Reviewed-by: CK Hu <ck.hu@...iatek.com>

> 
> Signed-off-by: Jason-JH.Lin <jason-jh.lin@...iatek.com>
> Signed-off-by: AngeloGioacchino Del Regno <
> angelogioacchino.delregno@...labora.com>
> Reviewed-by: Alexandre Mergnat <amergnat@...libre.com>
> ---
>  drivers/gpu/drm/mediatek/mtk_disp_aal.c   |  2 +-
>  drivers/gpu/drm/mediatek/mtk_disp_drv.h   |  2 +-
>  drivers/gpu/drm/mediatek/mtk_disp_gamma.c | 18 ++++++++++++------
>  3 files changed, 14 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/gpu/drm/mediatek/mtk_disp_aal.c
> b/drivers/gpu/drm/mediatek/mtk_disp_aal.c
> index cdbec79474d1..2f602f1f1c49 100644
> --- a/drivers/gpu/drm/mediatek/mtk_disp_aal.c
> +++ b/drivers/gpu/drm/mediatek/mtk_disp_aal.c
> @@ -66,7 +66,7 @@ void mtk_aal_gamma_set(struct device *dev, struct
> drm_crtc_state *state)
>  	struct mtk_disp_aal *aal = dev_get_drvdata(dev);
>  
>  	if (aal->data && aal->data->has_gamma)
> -		mtk_gamma_set_common(aal->regs, state, false);
> +		mtk_gamma_set_common(NULL, aal->regs, state);
>  }
>  
>  void mtk_aal_start(struct device *dev)
> diff --git a/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> index 2254038519e1..75045932353e 100644
> --- a/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> +++ b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> @@ -54,7 +54,7 @@ void mtk_gamma_config(struct device *dev, unsigned
> int w,
>  		      unsigned int h, unsigned int vrefresh,
>  		      unsigned int bpc, struct cmdq_pkt *cmdq_pkt);
>  void mtk_gamma_set(struct device *dev, struct drm_crtc_state
> *state);
> -void mtk_gamma_set_common(void __iomem *regs, struct drm_crtc_state
> *state, bool lut_diff);
> +void mtk_gamma_set_common(struct device *dev, void __iomem *regs,
> struct drm_crtc_state *state);
>  void mtk_gamma_start(struct device *dev);
>  void mtk_gamma_stop(struct device *dev);
>  
> diff --git a/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> b/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> index 7746dceadb20..d42cc0698d83 100644
> --- a/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> +++ b/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> @@ -54,14 +54,24 @@ void mtk_gamma_clk_disable(struct device *dev)
>  	clk_disable_unprepare(gamma->clk);
>  }
>  
> -void mtk_gamma_set_common(void __iomem *regs, struct drm_crtc_state
> *state, bool lut_diff)
> +void mtk_gamma_set_common(struct device *dev, void __iomem *regs,
> struct drm_crtc_state *state)
>  {
> +	struct mtk_disp_gamma *gamma;
>  	unsigned int i, reg;
>  	struct drm_color_lut *lut;
>  	void __iomem *lut_base;
> +	bool lut_diff;
>  	u32 word;
>  	u32 diff[3] = {0};
>  
> +	/* If we're called from AAL, dev is NULL */
> +	gamma = dev ? dev_get_drvdata(dev) : NULL;
> +
> +	if (gamma && gamma->data)
> +		lut_diff = gamma->data->lut_diff;
> +	else
> +		lut_diff = false;
> +
>  	if (state->gamma_lut) {
>  		reg = readl(regs + DISP_GAMMA_CFG);
>  		reg = reg | GAMMA_LUT_EN;
> @@ -91,12 +101,8 @@ void mtk_gamma_set_common(void __iomem *regs,
> struct drm_crtc_state *state, bool
>  void mtk_gamma_set(struct device *dev, struct drm_crtc_state *state)
>  {
>  	struct mtk_disp_gamma *gamma = dev_get_drvdata(dev);
> -	bool lut_diff = false;
> -
> -	if (gamma->data)
> -		lut_diff = gamma->data->lut_diff;
>  
> -	mtk_gamma_set_common(gamma->regs, state, lut_diff);
> +	mtk_gamma_set_common(dev, gamma->regs, state);
>  }
>  
>  void mtk_gamma_config(struct device *dev, unsigned int w,