linux-kernel - Re: [PATCH v10,1/3] soc: mediatek: Add all settings to mtk_mmsys_ddp_dpi_fmt

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Message-ID: <a2a56cad95a44c587b29b80e7364d02bd94821c2.camel@mediatek.com>
Date:   Mon, 26 Sep 2022 06:32:59 +0000
From:   CK Hu (胡俊光) <ck.hu@...iatek.com>
To:     Jason-JH Lin (林睿祥) 
        <Jason-JH.Lin@...iatek.com>,
        Xinlei Lee (李昕磊) 
        <Xinlei.Lee@...iatek.com>,
        "p.zabel@...gutronix.de" <p.zabel@...gutronix.de>,
        "daniel@...ll.ch" <daniel@...ll.ch>,
        "matthias.bgg@...il.com" <matthias.bgg@...il.com>,
        "airlied@...ux.ie" <airlied@...ux.ie>,
        Rex-BC Chen (陳柏辰) 
        <Rex-BC.Chen@...iatek.com>,
        "angelogioacchino.delregno@...labora.com" 
        <angelogioacchino.delregno@...labora.com>
CC:     "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-mediatek@...ts.infradead.org" 
        <linux-mediatek@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Project_Global_Chrome_Upstream_Group 
        <Project_Global_Chrome_Upstream_Group@...iatek.com>,
        Jitao Shi (石记涛) <jitao.shi@...iatek.com>
Subject: Re: [PATCH v10,1/3] soc: mediatek: Add all settings to
 mtk_mmsys_ddp_dpi_fmt_config func

Hi, Xinlei:

On Fri, 2022-09-23 at 17:58 +0800, xinlei.lee@...iatek.com wrote:
> From: Xinlei Lee <xinlei.lee@...iatek.com>
> 
> The difference between MT8186 and other ICs is that when modifying
> the
> output format, we need to modify the mmsys_base+0x400 register to
> take
> effect.
> So when setting the dpi output format, we need to call mmsys_func to
> set
> it to MT8186 synchronously.
> Adding mmsys all the settings that need to be modified with dpi are
> for mt8186.

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

> 
> Fixes: a071e52f75d1 ("soc: mediatek: Add mmsys func to adapt to dpi
> output for MT8186")
> 
> Signed-off-by: Xinlei Lee <xinlei.lee@...iatek.com>
> Reviewed-by: AngeloGioacchino Del Regno <
> angelogioacchino.delregno@...labora.com>
> ---
>  drivers/soc/mediatek/mt8186-mmsys.h    |  8 +++++---
>  drivers/soc/mediatek/mtk-mmsys.c       | 27 ++++++++++++++++++++--
> ----
>  include/linux/soc/mediatek/mtk-mmsys.h |  7 +++++++
>  3 files changed, 33 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/soc/mediatek/mt8186-mmsys.h
> b/drivers/soc/mediatek/mt8186-mmsys.h
> index 09b1ccbc0093..035aec1eb616 100644
> --- a/drivers/soc/mediatek/mt8186-mmsys.h
> +++ b/drivers/soc/mediatek/mt8186-mmsys.h
> @@ -5,9 +5,11 @@
>  
>  /* Values for DPI configuration in MMSYS address space */
>  #define MT8186_MMSYS_DPI_OUTPUT_FORMAT		0x400
> -#define DPI_FORMAT_MASK					0x1
> -#define DPI_RGB888_DDR_CON				BIT(0)
> -#define DPI_RGB565_SDR_CON				BIT(1)
> +#define DPI_FORMAT_MASK					GENMASK
> (1, 0)
> +#define DPI_RGB888_SDR_CON				0
> +#define DPI_RGB888_DDR_CON				1
> +#define DPI_RGB565_SDR_CON				2
> +#define DPI_RGB565_DDR_CON				3
>  
>  #define MT8186_MMSYS_OVL_CON			0xF04
>  #define MT8186_MMSYS_OVL0_CON_MASK			0x3
> diff --git a/drivers/soc/mediatek/mtk-mmsys.c
> b/drivers/soc/mediatek/mtk-mmsys.c
> index 2e20b24da363..95fbac5bd378 100644
> --- a/drivers/soc/mediatek/mtk-mmsys.c
> +++ b/drivers/soc/mediatek/mtk-mmsys.c
> @@ -238,12 +238,27 @@ static void mtk_mmsys_update_bits(struct
> mtk_mmsys *mmsys, u32 offset, u32 mask,
>  
>  void mtk_mmsys_ddp_dpi_fmt_config(struct device *dev, u32 val)
>  {
> -	if (val)
> -		mtk_mmsys_update_bits(dev_get_drvdata(dev),
> MT8186_MMSYS_DPI_OUTPUT_FORMAT,
> -				      DPI_RGB888_DDR_CON,
> DPI_FORMAT_MASK);
> -	else
> -		mtk_mmsys_update_bits(dev_get_drvdata(dev),
> MT8186_MMSYS_DPI_OUTPUT_FORMAT,
> -				      DPI_RGB565_SDR_CON,
> DPI_FORMAT_MASK);
> +	struct mtk_mmsys *mmsys = dev_get_drvdata(dev);
> +
> +	switch (val) {
> +	case MTK_DPI_RGB888_SDR_CON:
> +		mtk_mmsys_update_bits(mmsys,
> MT8186_MMSYS_DPI_OUTPUT_FORMAT,
> +				      DPI_FORMAT_MASK,
> DPI_RGB888_SDR_CON);
> +		break;
> +	case MTK_DPI_RGB565_SDR_CON:
> +		mtk_mmsys_update_bits(mmsys,
> MT8186_MMSYS_DPI_OUTPUT_FORMAT,
> +				      DPI_FORMAT_MASK,
> DPI_RGB565_SDR_CON);
> +		break;
> +	case MTK_DPI_RGB565_DDR_CON:
> +		mtk_mmsys_update_bits(mmsys,
> MT8186_MMSYS_DPI_OUTPUT_FORMAT,
> +				      DPI_FORMAT_MASK,
> DPI_RGB565_DDR_CON);
> +		break;
> +	case MTK_DPI_RGB888_DDR_CON:
> +	default:
> +		mtk_mmsys_update_bits(mmsys,
> MT8186_MMSYS_DPI_OUTPUT_FORMAT,
> +				      DPI_FORMAT_MASK,
> DPI_RGB888_DDR_CON);
> +		break;
> +	}
>  }
>  EXPORT_SYMBOL_GPL(mtk_mmsys_ddp_dpi_fmt_config);
>  
> diff --git a/include/linux/soc/mediatek/mtk-mmsys.h
> b/include/linux/soc/mediatek/mtk-mmsys.h
> index d2b02bb43768..b85f66db33e1 100644
> --- a/include/linux/soc/mediatek/mtk-mmsys.h
> +++ b/include/linux/soc/mediatek/mtk-mmsys.h
> @@ -9,6 +9,13 @@
>  enum mtk_ddp_comp_id;
>  struct device;
>  
> +enum mtk_dpi_out_format_con {
> +	MTK_DPI_RGB888_SDR_CON,
> +	MTK_DPI_RGB888_DDR_CON,
> +	MTK_DPI_RGB565_SDR_CON,
> +	MTK_DPI_RGB565_DDR_CON
> +};
> +
>  enum mtk_ddp_comp_id {
>  	DDP_COMPONENT_AAL0,
>  	DDP_COMPONENT_AAL1,