linux-kernel - Re: [PATCH v6 02/10] drm/rockchip: analogix

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Message-ID: <88902b60-d096-f828-6d5d-44d44b6f4c50@rock-chips.com>
Date:   Fri, 20 Oct 2017 09:48:35 +0800
From:   Mark yao <mark.yao@...k-chips.com>
To:     Jeffy Chen <jeffy.chen@...k-chips.com>,
        linux-kernel@...r.kernel.org
Cc:     briannorris@...omium.org, seanpaul@...omium.org,
        dianders@...omium.org, heiko@...ech.de, tfiga@...omium.org,
        dri-devel@...ts.freedesktop.org,
        linux-rockchip@...ts.infradead.org,
        David Airlie <airlied@...ux.ie>,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v6 02/10] drm/rockchip: analogix_dp: Remove unnecessary
 init code

On 2017年10月19日 11:48, Jeffy Chen wrote:
> Remove unnecessary init code, since we would do it in the power_on()
> callback.
>
> Also move of parse code to probe().
>
> Fixes: 9e32e16e9e98 ("drm: rockchip: dp: add rockchip platform dp driver")
> Signed-off-by: Jeffy Chen <jeffy.chen@...k-chips.com>

Looks good for me
Acked-by: Mark Yao <mark.yao@...k-chips.com>

> ---
>
> Changes in v6: None
> Changes in v5: None
>
>   drivers/gpu/drm/rockchip/analogix_dp-rockchip.c | 27 ++++++-------------------
>   1 file changed, 6 insertions(+), 21 deletions(-)
>
> diff --git a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
> index 4d3f6ad0abdd..8cae5ad926cd 100644
> --- a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
> +++ b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
> @@ -269,7 +269,7 @@ static struct drm_encoder_funcs rockchip_dp_encoder_funcs = {
>   	.destroy = rockchip_dp_drm_encoder_destroy,
>   };
>   
> -static int rockchip_dp_init(struct rockchip_dp_device *dp)
> +static int rockchip_dp_of_probe(struct rockchip_dp_device *dp)
>   {
>   	struct device *dev = dp->dev;
>   	struct device_node *np = dev->of_node;
> @@ -303,19 +303,6 @@ static int rockchip_dp_init(struct rockchip_dp_device *dp)
>   		return PTR_ERR(dp->rst);
>   	}
>   
> -	ret = clk_prepare_enable(dp->pclk);
> -	if (ret < 0) {
> -		DRM_DEV_ERROR(dp->dev, "failed to enable pclk %d\n", ret);
> -		return ret;
> -	}
> -
> -	ret = rockchip_dp_pre_init(dp);
> -	if (ret < 0) {
> -		DRM_DEV_ERROR(dp->dev, "failed to pre init %d\n", ret);
> -		clk_disable_unprepare(dp->pclk);
> -		return ret;
> -	}
> -
>   	return 0;
>   }
>   
> @@ -361,10 +348,6 @@ static int rockchip_dp_bind(struct device *dev, struct device *master,
>   	if (!dp_data)
>   		return -ENODEV;
>   
> -	ret = rockchip_dp_init(dp);
> -	if (ret < 0)
> -		return ret;
> -
>   	dp->data = dp_data;
>   	dp->drm_dev = drm_dev;
>   
> @@ -398,7 +381,6 @@ static void rockchip_dp_unbind(struct device *dev, struct device *master,
>   	rockchip_drm_psr_unregister(&dp->encoder);
>   
>   	analogix_dp_unbind(dev, master, data);
> -	clk_disable_unprepare(dp->pclk);
>   }
>   
>   static const struct component_ops rockchip_dp_component_ops = {
> @@ -414,7 +396,7 @@ static int rockchip_dp_probe(struct platform_device *pdev)
>   	int ret;
>   
>   	ret = drm_of_find_panel_or_bridge(dev->of_node, 1, 0, &panel, NULL);
> -	if (ret)
> +	if (ret < 0)
>   		return ret;
>   
>   	dp = devm_kzalloc(dev, sizeof(*dp), GFP_KERNEL);
> @@ -422,9 +404,12 @@ static int rockchip_dp_probe(struct platform_device *pdev)
>   		return -ENOMEM;
>   
>   	dp->dev = dev;
> -
>   	dp->plat_data.panel = panel;
>   
> +	ret = rockchip_dp_of_probe(dp);
> +	if (ret < 0)
> +		return ret;
> +
>   	/*
>   	 * We just use the drvdata until driver run into component
>   	 * add function, and then we would set drvdata to null, so