linux-kernel - Re: [PATCH 1/2] drm/msm: simplify getting .driver

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Message-ID: <7d66ed6f-1dc4-05ec-567e-939df7d8c94b@ideasonboard.com>
Date:   Fri, 22 Mar 2019 08:18:06 +0000
From:   Kieran Bingham <kieran.bingham+renesas@...asonboard.com>
To:     Wolfram Sang <wsa+renesas@...g-engineering.com>,
        linux-kernel@...r.kernel.org
Cc:     linux-renesas-soc@...r.kernel.org, Rob Clark <robdclark@...il.com>,
        Sean Paul <sean@...rly.run>, David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>, linux-arm-msm@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org
Subject: Re: [PATCH 1/2] drm/msm: simplify getting .driver_data

Hi Wolfram,

Thank you for the patch,

On 19/03/2019 16:36, Wolfram Sang wrote:
> We should get 'driver_data' from 'struct device' directly. Going via
> platform_device is an unneeded step back and forth.
> 
> Signed-off-by: Wolfram Sang <wsa+renesas@...g-engineering.com>

This looks good to me.

Reviewed-by: Kieran Bingham <kieran.bingham+renesas@...asonboard.com>

> ---
> 
> Build tested only. buildbot is happy.
> 
>  drivers/gpu/drm/msm/adreno/adreno_device.c |  6 ++----
>  drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c    | 13 +++++--------
>  drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c   |  6 ++----
>  drivers/gpu/drm/msm/dsi/dsi_host.c         |  6 ++----
>  drivers/gpu/drm/msm/msm_drv.c              |  3 +--
>  5 files changed, 12 insertions(+), 22 deletions(-)
> 
> diff --git a/drivers/gpu/drm/msm/adreno/adreno_device.c b/drivers/gpu/drm/msm/adreno/adreno_device.c
> index 714ed6505e47..13802af8294c 100644
> --- a/drivers/gpu/drm/msm/adreno/adreno_device.c
> +++ b/drivers/gpu/drm/msm/adreno/adreno_device.c
> @@ -412,16 +412,14 @@ static const struct of_device_id dt_match[] = {
>  #ifdef CONFIG_PM
>  static int adreno_resume(struct device *dev)
>  {
> -	struct platform_device *pdev = to_platform_device(dev);
> -	struct msm_gpu *gpu = platform_get_drvdata(pdev);
> +	struct msm_gpu *gpu = dev_get_drvdata(dev);

Nice simplification :-)

Do you catch these with Coccinelle?

>  
>  	return gpu->funcs->pm_resume(gpu);
>  }
>  
>  static int adreno_suspend(struct device *dev)
>  {
> -	struct platform_device *pdev = to_platform_device(dev);
> -	struct msm_gpu *gpu = platform_get_drvdata(pdev);
> +	struct msm_gpu *gpu = dev_get_drvdata(dev);
>  
>  	return gpu->funcs->pm_suspend(gpu);
>  }
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
> index 885bf88afa3e..0154eb9b343f 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
> @@ -1036,16 +1036,15 @@ static int dpu_bind(struct device *dev, struct device *master, void *data)
>  
>  static void dpu_unbind(struct device *dev, struct device *master, void *data)
>  {
> -	struct platform_device *pdev = to_platform_device(dev);
> -	struct dpu_kms *dpu_kms = platform_get_drvdata(pdev);
> +	struct dpu_kms *dpu_kms = dev_get_drvdata(dev);
>  	struct dss_module_power *mp = &dpu_kms->mp;
>  
>  	msm_dss_put_clk(mp->clk_config, mp->num_clk);
> -	devm_kfree(&pdev->dev, mp->clk_config);
> +	devm_kfree(dev, mp->clk_config);


Using the dev to get the pdev to get the dev :-D

>  	mp->num_clk = 0;
>  
>  	if (dpu_kms->rpm_enabled)
> -		pm_runtime_disable(&pdev->dev);
> +		pm_runtime_disable(dev);
>  }
>  
>  static const struct component_ops dpu_ops = {
> @@ -1067,8 +1066,7 @@ static int dpu_dev_remove(struct platform_device *pdev)
>  static int __maybe_unused dpu_runtime_suspend(struct device *dev)
>  {
>  	int rc = -1;
> -	struct platform_device *pdev = to_platform_device(dev);
> -	struct dpu_kms *dpu_kms = platform_get_drvdata(pdev);
> +	struct dpu_kms *dpu_kms = dev_get_drvdata(dev);
>  	struct drm_device *ddev;
>  	struct dss_module_power *mp = &dpu_kms->mp;
>  
> @@ -1088,8 +1086,7 @@ static int __maybe_unused dpu_runtime_suspend(struct device *dev)
>  static int __maybe_unused dpu_runtime_resume(struct device *dev)
>  {
>  	int rc = -1;
> -	struct platform_device *pdev = to_platform_device(dev);
> -	struct dpu_kms *dpu_kms = platform_get_drvdata(pdev);
> +	struct dpu_kms *dpu_kms = dev_get_drvdata(dev);
>  	struct drm_encoder *encoder;
>  	struct drm_device *ddev;
>  	struct dss_module_power *mp = &dpu_kms->mp;
> diff --git a/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c b/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c
> index 97179bec8902..8f7a01d7a663 100644
> --- a/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c
> +++ b/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c
> @@ -1063,8 +1063,7 @@ static int mdp5_dev_remove(struct platform_device *pdev)
>  
>  static __maybe_unused int mdp5_runtime_suspend(struct device *dev)
>  {
> -	struct platform_device *pdev = to_platform_device(dev);
> -	struct mdp5_kms *mdp5_kms = platform_get_drvdata(pdev);
> +	struct mdp5_kms *mdp5_kms = dev_get_drvdata(dev);
>  
>  	DBG("");
>  
> @@ -1073,8 +1072,7 @@ static __maybe_unused int mdp5_runtime_suspend(struct device *dev)
>  
>  static __maybe_unused int mdp5_runtime_resume(struct device *dev)
>  {
> -	struct platform_device *pdev = to_platform_device(dev);
> -	struct mdp5_kms *mdp5_kms = platform_get_drvdata(pdev);
> +	struct mdp5_kms *mdp5_kms = dev_get_drvdata(dev);
>  
>  	DBG("");
>  
> diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c
> index 610183db1daf..4a158c41ef30 100644
> --- a/drivers/gpu/drm/msm/dsi/dsi_host.c
> +++ b/drivers/gpu/drm/msm/dsi/dsi_host.c
> @@ -485,8 +485,7 @@ static void dsi_bus_clk_disable(struct msm_dsi_host *msm_host)
>  
>  int msm_dsi_runtime_suspend(struct device *dev)
>  {
> -	struct platform_device *pdev = to_platform_device(dev);
> -	struct msm_dsi *msm_dsi = platform_get_drvdata(pdev);
> +	struct msm_dsi *msm_dsi = dev_get_drvdata(dev);
>  	struct mipi_dsi_host *host = msm_dsi->host;
>  	struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
>  
> @@ -500,8 +499,7 @@ int msm_dsi_runtime_suspend(struct device *dev)
>  
>  int msm_dsi_runtime_resume(struct device *dev)
>  {
> -	struct platform_device *pdev = to_platform_device(dev);
> -	struct msm_dsi *msm_dsi = platform_get_drvdata(pdev);
> +	struct msm_dsi *msm_dsi = dev_get_drvdata(dev);
>  	struct mipi_dsi_host *host = msm_dsi->host;
>  	struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
>  
> diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c
> index 0bdd93648761..071ad87ce44e 100644
> --- a/drivers/gpu/drm/msm/msm_drv.c
> +++ b/drivers/gpu/drm/msm/msm_drv.c
> @@ -251,8 +251,7 @@ static int vblank_ctrl_queue_work(struct msm_drm_private *priv,
>  
>  static int msm_drm_uninit(struct device *dev)
>  {
> -	struct platform_device *pdev = to_platform_device(dev);
> -	struct drm_device *ddev = platform_get_drvdata(pdev);
> +	struct drm_device *ddev = dev_get_drvdata(dev);
>  	struct msm_drm_private *priv = ddev->dev_private;
>  	struct msm_kms *kms = priv->kms;
>  	struct msm_mdss *mdss = priv->mdss;
>