Re: [PATCH 33/44] drm/mcde: Don't use drm_device->dev_private

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On Fri, Apr 03, 2020 at 03:58:17PM +0200, Daniel Vetter wrote:
> Upcasting using a container_of macro is more typesafe, faster and
> easier for the compiler to optimize.
> 
> Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxxx>
> Cc: Linus Walleij <linus.walleij@xxxxxxxxxx>
Acked-by: Sam Ravnborg <sam@xxxxxxxxxxxx>
> ---
>  drivers/gpu/drm/mcde/mcde_display.c | 10 +++++-----
>  drivers/gpu/drm/mcde/mcde_drm.h     |  2 ++
>  drivers/gpu/drm/mcde/mcde_drv.c     |  5 ++---
>  drivers/gpu/drm/mcde/mcde_dsi.c     |  2 +-
>  4 files changed, 10 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/gpu/drm/mcde/mcde_display.c b/drivers/gpu/drm/mcde/mcde_display.c
> index e59907e68854..04e1d38d41f7 100644
> --- a/drivers/gpu/drm/mcde/mcde_display.c
> +++ b/drivers/gpu/drm/mcde/mcde_display.c
> @@ -948,7 +948,7 @@ static void mcde_display_disable(struct drm_simple_display_pipe *pipe)
>  {
>  	struct drm_crtc *crtc = &pipe->crtc;
>  	struct drm_device *drm = crtc->dev;
> -	struct mcde *mcde = drm->dev_private;
> +	struct mcde *mcde = to_mcde(drm);
>  	struct drm_pending_vblank_event *event;
>  
>  	drm_crtc_vblank_off(crtc);
> @@ -1020,7 +1020,7 @@ static void mcde_display_update(struct drm_simple_display_pipe *pipe,
>  {
>  	struct drm_crtc *crtc = &pipe->crtc;
>  	struct drm_device *drm = crtc->dev;
> -	struct mcde *mcde = drm->dev_private;
> +	struct mcde *mcde = to_mcde(drm);
>  	struct drm_pending_vblank_event *event = crtc->state->event;
>  	struct drm_plane *plane = &pipe->plane;
>  	struct drm_plane_state *pstate = plane->state;
> @@ -1078,7 +1078,7 @@ static int mcde_display_enable_vblank(struct drm_simple_display_pipe *pipe)
>  {
>  	struct drm_crtc *crtc = &pipe->crtc;
>  	struct drm_device *drm = crtc->dev;
> -	struct mcde *mcde = drm->dev_private;
> +	struct mcde *mcde = to_mcde(drm);
>  	u32 val;
>  
>  	/* Enable all VBLANK IRQs */
> @@ -1097,7 +1097,7 @@ static void mcde_display_disable_vblank(struct drm_simple_display_pipe *pipe)
>  {
>  	struct drm_crtc *crtc = &pipe->crtc;
>  	struct drm_device *drm = crtc->dev;
> -	struct mcde *mcde = drm->dev_private;
> +	struct mcde *mcde = to_mcde(drm);
>  
>  	/* Disable all VBLANK IRQs */
>  	writel(0, mcde->regs + MCDE_IMSCPP);
> @@ -1117,7 +1117,7 @@ static struct drm_simple_display_pipe_funcs mcde_display_funcs = {
>  
>  int mcde_display_init(struct drm_device *drm)
>  {
> -	struct mcde *mcde = drm->dev_private;
> +	struct mcde *mcde = to_mcde(drm);
>  	int ret;
>  	static const u32 formats[] = {
>  		DRM_FORMAT_ARGB8888,
> diff --git a/drivers/gpu/drm/mcde/mcde_drm.h b/drivers/gpu/drm/mcde/mcde_drm.h
> index 80edd6628979..679c2c4e6d9d 100644
> --- a/drivers/gpu/drm/mcde/mcde_drm.h
> +++ b/drivers/gpu/drm/mcde/mcde_drm.h
> @@ -34,6 +34,8 @@ struct mcde {
>  	struct regulator *vana;
>  };
>  
> +#define to_mcde(dev) container_of(dev, struct mcde, drm)
> +
>  bool mcde_dsi_irq(struct mipi_dsi_device *mdsi);
>  void mcde_dsi_te_request(struct mipi_dsi_device *mdsi);
>  extern struct platform_driver mcde_dsi_driver;
> diff --git a/drivers/gpu/drm/mcde/mcde_drv.c b/drivers/gpu/drm/mcde/mcde_drv.c
> index bdb525e3c5d7..84f3e2dbd77b 100644
> --- a/drivers/gpu/drm/mcde/mcde_drv.c
> +++ b/drivers/gpu/drm/mcde/mcde_drv.c
> @@ -164,7 +164,7 @@ static irqreturn_t mcde_irq(int irq, void *data)
>  static int mcde_modeset_init(struct drm_device *drm)
>  {
>  	struct drm_mode_config *mode_config;
> -	struct mcde *mcde = drm->dev_private;
> +	struct mcde *mcde = to_mcde(drm);
>  	int ret;
>  
>  	if (!mcde->bridge) {
> @@ -311,7 +311,6 @@ static int mcde_probe(struct platform_device *pdev)
>  	if (IS_ERR(mcde))
>  		return PTR_ERR(mcde);
>  	drm = &mcde->drm;
> -	drm->dev_private = mcde;
>  	mcde->dev = dev;
>  	platform_set_drvdata(pdev, drm);
>  
> @@ -486,7 +485,7 @@ static int mcde_probe(struct platform_device *pdev)
>  static int mcde_remove(struct platform_device *pdev)
>  {
>  	struct drm_device *drm = platform_get_drvdata(pdev);
> -	struct mcde *mcde = drm->dev_private;
> +	struct mcde *mcde = to_mcde(drm);
>  
>  	component_master_del(&pdev->dev, &mcde_drm_comp_ops);
>  	clk_disable_unprepare(mcde->mcde_clk);
> diff --git a/drivers/gpu/drm/mcde/mcde_dsi.c b/drivers/gpu/drm/mcde/mcde_dsi.c
> index 7af5ebb0c436..1baa2324cdb9 100644
> --- a/drivers/gpu/drm/mcde/mcde_dsi.c
> +++ b/drivers/gpu/drm/mcde/mcde_dsi.c
> @@ -1020,7 +1020,7 @@ static int mcde_dsi_bind(struct device *dev, struct device *master,
>  			 void *data)
>  {
>  	struct drm_device *drm = data;
> -	struct mcde *mcde = drm->dev_private;
> +	struct mcde *mcde = to_mcde(drm);
>  	struct mcde_dsi *d = dev_get_drvdata(dev);
>  	struct device_node *child;
>  	struct drm_panel *panel = NULL;
> -- 
> 2.25.1
> 
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