Re: [PATCH 02/10] drm: Rename plane atomic_check state names

[Laurent Pinchart]

Hi Maxime,

Thank you for the patch.

On Fri, Jan 15, 2021 at 01:56:54PM +0100, Maxime Ripard wrote:
> Most drivers call the argument to the plane atomic_check hook simply
> state, which is going to conflict with the global atomic state in a
> later rework. Let's rename it to new_plane_state (or new_state depending
> on the convention used in the driver).
> 
> This was done using the coccinelle script below, and built tested:
> 
> @ plane_atomic_func @
> identifier helpers;
> identifier func;
> @@
> 
>  static const struct drm_plane_helper_funcs helpers = {
>  	.atomic_check = func,
>  };
> 
> @ has_old_state @
> identifier plane_atomic_func.func;
> identifier plane;
> expression e;
> symbol old_state;
> symbol state;
> @@
> 
>  func(struct drm_plane *plane, struct drm_plane_state *state)
>  {
>  	...
>  	struct drm_plane_state *old_state = e;
>  	...
>  }
> 
> @ depends on has_old_state @
> identifier plane_atomic_func.func;
> identifier plane;
> symbol old_state;
> @@
> 
>  func(struct drm_plane *plane,
> -	struct drm_plane_state *state
> +	struct drm_plane_state *new_state
>      )
>  {
>  	<+...
> -	state
> +	new_state
> 	...+>
>  }
> 
> @ has_state @
> identifier plane_atomic_func.func;
> identifier plane;
> symbol state;
> @@
> 
>  func(struct drm_plane *plane, struct drm_plane_state *state)
>  {
>  	...
>  }
> 
> @ depends on has_state @
> identifier plane_atomic_func.func;
> identifier plane;
> symbol old_state;
> @@
> 
>  func(struct drm_plane *plane,
> -	struct drm_plane_state *state
> +	struct drm_plane_state *new_plane_state
>      )
>  {
>  	<+...
> -	state
> +	new_plane_state
> 	...+>
>  }
> 
> Signed-off-by: Maxime Ripard <maxime@xxxxxxxxxx>
> ---

[...]

>  drivers/gpu/drm/omapdrm/omap_plane.c          | 19 +++++----
>  drivers/gpu/drm/rcar-du/rcar_du_plane.c       |  7 ++--
>  drivers/gpu/drm/rcar-du/rcar_du_vsp.c         |  7 ++--
>  drivers/gpu/drm/xlnx/zynqmp_disp.c            | 10 +++--

For these, with the comment below addressed,

Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>

>  41 files changed, 402 insertions(+), 357 deletions(-)

[snip]

> diff --git a/drivers/gpu/drm/omapdrm/omap_plane.c b/drivers/gpu/drm/omapdrm/omap_plane.c
> index 51dc24acea73..78d0eb1fd69d 100644
> --- a/drivers/gpu/drm/omapdrm/omap_plane.c
> +++ b/drivers/gpu/drm/omapdrm/omap_plane.c
> @@ -99,18 +99,19 @@ static void omap_plane_atomic_disable(struct drm_plane *plane,
>  }
>  
>  static int omap_plane_atomic_check(struct drm_plane *plane,
> -				   struct drm_plane_state *state)
> +				   struct drm_plane_state *new_plane_state)
>  {
>  	struct drm_crtc_state *crtc_state;
>  
> -	if (!state->fb)
> +	if (!new_plane_state->fb)
>  		return 0;
>  
>  	/* crtc should only be NULL when disabling (i.e., !state->fb) */

s/state/new_plane_state/ here too ?

> -	if (WARN_ON(!state->crtc))
> +	if (WARN_ON(!new_plane_state->crtc))
>  		return 0;
>  
> -	crtc_state = drm_atomic_get_existing_crtc_state(state->state, state->crtc);
> +	crtc_state = drm_atomic_get_existing_crtc_state(new_plane_state->state,
> +							new_plane_state->crtc);
>  	/* we should have a crtc state if the plane is attached to a crtc */
>  	if (WARN_ON(!crtc_state))
>  		return 0;
> @@ -118,17 +119,17 @@ static int omap_plane_atomic_check(struct drm_plane *plane,
>  	if (!crtc_state->enable)
>  		return 0;
>  
> -	if (state->crtc_x < 0 || state->crtc_y < 0)
> +	if (new_plane_state->crtc_x < 0 || new_plane_state->crtc_y < 0)
>  		return -EINVAL;
>  
> -	if (state->crtc_x + state->crtc_w > crtc_state->adjusted_mode.hdisplay)
> +	if (new_plane_state->crtc_x + new_plane_state->crtc_w > crtc_state->adjusted_mode.hdisplay)

I can't help thinking we're using too long variable names... :-(

>  		return -EINVAL;
>  
> -	if (state->crtc_y + state->crtc_h > crtc_state->adjusted_mode.vdisplay)
> +	if (new_plane_state->crtc_y + new_plane_state->crtc_h > crtc_state->adjusted_mode.vdisplay)
>  		return -EINVAL;
>  
> -	if (state->rotation != DRM_MODE_ROTATE_0 &&
> -	    !omap_framebuffer_supports_rotation(state->fb))
> +	if (new_plane_state->rotation != DRM_MODE_ROTATE_0 &&
> +	    !omap_framebuffer_supports_rotation(new_plane_state->fb))
>  		return -EINVAL;
>  
>  	return 0;

[...]

-- 
Regards,

Laurent Pinchart