linux-kernel - Re: [PATCH v17 04/10] drm/mediatek: dp: Add multiple bridge types support

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Date:   Fri, 2 Sep 2022 15:22:35 +0800
From:   CK Hu <ck.hu@...iatek.com>
To:     Bo-Chen Chen <rex-bc.chen@...iatek.com>, <chunkuang.hu@...nel.org>,
        <p.zabel@...gutronix.de>, <daniel@...ll.ch>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <mripard@...nel.org>,
        <tzimmermann@...e.de>, <matthias.bgg@...il.com>, <deller@....de>,
        <airlied@...ux.ie>
CC:     <msp@...libre.com>, <granquet@...libre.com>,
        <jitao.shi@...iatek.com>, <wenst@...omium.org>,
        <angelogioacchino.delregno@...labora.com>,
        <liangxu.xu@...iatek.com>, <dri-devel@...ts.freedesktop.org>,
        <linux-mediatek@...ts.infradead.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-fbdev@...r.kernel.org>,
        <Project_Global_Chrome_Upstream_Group@...iatek.com>
Subject: Re: [PATCH v17 04/10] drm/mediatek: dp: Add multiple bridge types
 support

Hi, Bo-Chen:

On Thu, 2022-09-01 at 12:41 +0800, Bo-Chen Chen wrote:
> The bridge types of eDP and DP are different. We add device data to
> this driver and add bridge_type to the device data to define them.

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

> 
> Signed-off-by: Bo-Chen Chen <rex-bc.chen@...iatek.com>
> ---
>  drivers/gpu/drm/mediatek/mtk_dp.c | 16 ++++++++++++++--
>  1 file changed, 14 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/mediatek/mtk_dp.c
> b/drivers/gpu/drm/mediatek/mtk_dp.c
> index e2ec9b02b1aa..2696c1ac1a47 100644
> --- a/drivers/gpu/drm/mediatek/mtk_dp.c
> +++ b/drivers/gpu/drm/mediatek/mtk_dp.c
> @@ -101,6 +101,7 @@ struct mtk_dp {
>  	struct drm_device *drm_dev;
>  	struct drm_dp_aux aux;
>  
> +	const struct mtk_dp_data *data;
>  	struct mtk_dp_info info;
>  	struct mtk_dp_train_info train_info;
>  
> @@ -109,6 +110,9 @@ struct mtk_dp {
>  	struct regmap *regs;
>  };
>  
> +struct mtk_dp_data {
> +	int bridge_type;
> +};
>  static const struct mtk_dp_efuse_fmt
> mtk_dp_efuse_data[MTK_DP_CAL_MAX] = {
>  	[MTK_DP_CAL_GLB_BIAS_TRIM] = {
>  		.idx = 3,
> @@ -1871,6 +1875,7 @@ static int mtk_dp_probe(struct platform_device
> *pdev)
>  		return -ENOMEM;
>  
>  	mtk_dp->dev = dev;
> +	mtk_dp->data = (struct mtk_dp_data
> *)of_device_get_match_data(dev);
>  
>  	irq_num = platform_get_irq(pdev, 0);
>  	if (irq_num < 0)
> @@ -1925,7 +1930,7 @@ static int mtk_dp_probe(struct platform_device
> *pdev)
>  
>  	mtk_dp->bridge.ops =
>  		DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID |
> DRM_BRIDGE_OP_HPD;
> -	mtk_dp->bridge.type = DRM_MODE_CONNECTOR_eDP;
> +	mtk_dp->bridge.type = mtk_dp->data->bridge_type;
>  
>  	drm_bridge_add(&mtk_dp->bridge);
>  
> @@ -1974,8 +1979,15 @@ static int mtk_dp_resume(struct device *dev)
>  
>  static SIMPLE_DEV_PM_OPS(mtk_dp_pm_ops, mtk_dp_suspend,
> mtk_dp_resume);
>  
> +static const struct mtk_dp_data mt8195_edp_data = {
> +	.bridge_type = DRM_MODE_CONNECTOR_eDP,
> +};
> +
>  static const struct of_device_id mtk_dp_of_match[] = {
> -	{ .compatible = "mediatek,mt8195-edp-tx" },
> +	{
> +		.compatible = "mediatek,mt8195-edp-tx",
> +		.data = &mt8195_edp_data,
> +	},
>  	{},
>  };
>  MODULE_DEVICE_TABLE(of, mtk_dp_of_match);