linux-kernel - Re: [PATCH v10,2/3] drm: mediatek: Adjust the dpi output format to MT8186

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Message-ID: <0373e39a6aa15a2d38e4807acff0cab2e58b6ad7.camel@mediatek.com>
Date:   Mon, 26 Sep 2022 06:29:16 +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 v10,2/3] drm: mediatek: Adjust the dpi output format to
 MT8186

Hi, Xinlei:

After change the title to 'Set dpi format in mmsys',

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

Regards,
CK

On Fri, 2022-09-23 at 17:58 +0800, xinlei.lee@...iatek.com wrote:
> From: Xinlei Lee <xinlei.lee@...iatek.com>
> 
> Dpi output needs to adjust the output format to dual edge for MT8186.
> 
> Co-developed-by: Jitao Shi <jitao.shi@...iatek.com>
> Signed-off-by: Jitao Shi <jitao.shi@...iatek.com>
> Signed-off-by: Xinlei Lee <xinlei.lee@...iatek.com>
> ---
>  drivers/gpu/drm/mediatek/mtk_dpi.c | 11 +++++++++++
>  1 file changed, 11 insertions(+)
> 
> diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c
> b/drivers/gpu/drm/mediatek/mtk_dpi.c
> index 630a4e301ef6..ad87ecddf58d 100644
> --- a/drivers/gpu/drm/mediatek/mtk_dpi.c
> +++ b/drivers/gpu/drm/mediatek/mtk_dpi.c
> @@ -15,6 +15,7 @@
>  #include <linux/of_graph.h>
>  #include <linux/pinctrl/consumer.h>
>  #include <linux/platform_device.h>
> +#include <linux/soc/mediatek/mtk-mmsys.h>
>  #include <linux/types.h>
>  
>  #include <video/videomode.h>
> @@ -30,6 +31,7 @@
>  #include "mtk_disp_drv.h"
>  #include "mtk_dpi_regs.h"
>  #include "mtk_drm_ddp_comp.h"
> +#include "mtk_drm_drv.h"
>  
>  enum mtk_dpi_out_bit_num {
>  	MTK_DPI_OUT_BIT_NUM_8BITS,
> @@ -67,6 +69,7 @@ struct mtk_dpi {
>  	struct drm_connector *connector;
>  	void __iomem *regs;
>  	struct device *dev;
> +	struct device *mmsys_dev;
>  	struct clk *engine_clk;
>  	struct clk *pixel_clk;
>  	struct clk *tvd_clk;
> @@ -135,6 +138,7 @@ struct mtk_dpi_yc_limit {
>   * @yuv422_en_bit: Enable bit of yuv422.
>   * @csc_enable_bit: Enable bit of CSC.
>   * @pixels_per_iter: Quantity of transferred pixels per iteration.
> + * @edge_cfg_in_mmsys: If the edge configuration for DPI's output
> needs to be set in MMSYS.
>   */
>  struct mtk_dpi_conf {
>  	unsigned int (*cal_factor)(int clock);
> @@ -153,6 +157,7 @@ struct mtk_dpi_conf {
>  	u32 yuv422_en_bit;
>  	u32 csc_enable_bit;
>  	u32 pixels_per_iter;
> +	bool edge_cfg_in_mmsys;
>  };
>  
>  static void mtk_dpi_mask(struct mtk_dpi *dpi, u32 offset, u32 val,
> u32 mask)
> @@ -449,8 +454,12 @@ static void mtk_dpi_dual_edge(struct mtk_dpi
> *dpi)
>  		mtk_dpi_mask(dpi, DPI_OUTPUT_SETTING,
>  			     dpi->output_fmt ==
> MEDIA_BUS_FMT_RGB888_2X12_LE ?
>  			     EDGE_SEL : 0, EDGE_SEL);
> +		if (dpi->conf->edge_cfg_in_mmsys)
> +			mtk_mmsys_ddp_dpi_fmt_config(dpi->mmsys_dev,
> MTK_DPI_RGB888_DDR_CON);
>  	} else {
>  		mtk_dpi_mask(dpi, DPI_DDR_SETTING, DDR_EN | DDR_4PHASE,
> 0);
> +		if (dpi->conf->edge_cfg_in_mmsys)
> +			mtk_mmsys_ddp_dpi_fmt_config(dpi->mmsys_dev,
> MTK_DPI_RGB888_SDR_CON);
>  	}
>  }
>  
> @@ -778,8 +787,10 @@ static int mtk_dpi_bind(struct device *dev,
> struct device *master, void *data)
>  {
>  	struct mtk_dpi *dpi = dev_get_drvdata(dev);
>  	struct drm_device *drm_dev = data;
> +	struct mtk_drm_private *priv = drm_dev->dev_private;
>  	int ret;
>  
> +	dpi->mmsys_dev = priv->mmsys_dev;
>  	ret = drm_simple_encoder_init(drm_dev, &dpi->encoder,
>  				      DRM_MODE_ENCODER_TMDS);
>  	if (ret) {