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Date:   Tue, 8 Nov 2022 19:11:43 +0100
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Subject: Re: [PATCH v13,1/3] soc: mediatek: Add all settings to
 mtk_mmsys_ddp_dpi_fmt_config func
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To:     xinlei.lee@mediatek.com, rex-bc.chen@mediatek.com,
        angelogioacchino.delregno@collabora.com, jason-jh.lin@mediatek.com,
        nfraprado@collabora.com, chunkuang.hu@kernel.org,
        p.zabel@pengutronix.de, airlied@linux.ie, daniel@ffwll.ch
Cc:     dri-devel@lists.freedesktop.org,
        linux-mediatek@lists.infradead.org,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        Project_Global_Chrome_Upstream_Group@mediatek.com
References: <1666577099-3859-1-git-send-email-xinlei.lee@mediatek.com>
 <1666577099-3859-2-git-send-email-xinlei.lee@mediatek.com>
From:   Matthias Brugger <matthias.bgg@gmail.com>
In-Reply-To: <1666577099-3859-2-git-send-email-xinlei.lee@mediatek.com>
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Hi Xinlei,

Can you please fix the threading of this patches. I can see that this 1/3 but 
I'm not able to find 3/3 in the series. The first two look good, the third, I 
don't know.

Regards,
Matthias

On 24/10/2022 04:04, xinlei.lee@mediatek.com wrote:
> From: Xinlei Lee <xinlei.lee@mediatek.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
> mtk_mmsys_ddp_dpi_fmt_config to set it to MT8186 synchronously.
>    
> Commit a071e52f75d1 ("soc: mediatek: Add mmsys func to adapt to dpi
> output for MT8186") lacked some of the possible output formats and also
> had a wrong bitmask.
> 
> Add the missing output formats and fix the bitmask.
>    
> While at it, also update mtk_mmsys_ddp_dpi_fmt_config() to use generic
> formats, so that it is slightly easier to extend for other platforms.
>    
> Fixes: a071e52f75d1 ("soc: mediatek: Add mmsys func to adapt to dpi output for MT8186")
> Signed-off-by: Xinlei Lee <xinlei.lee@mediatek.com>
> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
> Reviewed-by: CK Hu <ck.hu@mediatek.com>
> Reviewed-by: Nícolas F. R. A. Prado <nfraprado@collabora.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..279d4138525b 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 MT8186_DPI_FORMAT_MASK				GENMASK(1, 0)
> +#define MT8186_DPI_RGB888_SDR_CON			0
> +#define MT8186_DPI_RGB888_DDR_CON			1
> +#define MT8186_DPI_RGB565_SDR_CON			2
> +#define MT8186_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..16cd924d8973 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,
> +				      MT8186_DPI_FORMAT_MASK, MT8186_DPI_RGB888_SDR_CON);
> +		break;
> +	case MTK_DPI_RGB565_SDR_CON:
> +		mtk_mmsys_update_bits(mmsys, MT8186_MMSYS_DPI_OUTPUT_FORMAT,
> +				      MT8186_DPI_FORMAT_MASK, MT8186_DPI_RGB565_SDR_CON);
> +		break;
> +	case MTK_DPI_RGB565_DDR_CON:
> +		mtk_mmsys_update_bits(mmsys, MT8186_MMSYS_DPI_OUTPUT_FORMAT,
> +				      MT8186_DPI_FORMAT_MASK, MT8186_DPI_RGB565_DDR_CON);
> +		break;
> +	case MTK_DPI_RGB888_DDR_CON:
> +	default:
> +		mtk_mmsys_update_bits(mmsys, MT8186_MMSYS_DPI_OUTPUT_FORMAT,
> +				      MT8186_DPI_FORMAT_MASK, MT8186_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,