Re: [PATCH v8 02/14] drm/exynos: atomic phase 1: use drm_plane_helper_update()

[Joonyoung Shim <jy0922.shim@samsung.com>]

On 05/28/2015 05:56 AM, Gustavo Padovan wrote:
> From: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
> 
> Rip out the check from exynos_update_plane() and create
> exynos_check_plane() for the check phase enabling use to use
> the atomic helpers to call our check and update phases when updating
> planes.
> 
> Update all users of exynos_update_plane() accordingly to call
> exynos_check_plane() before.
> 
> Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
> Reviewed-by: Joonyoung Shim <jy0922.shim@samsung.com>
> Tested-by: Tobias Jakobi <tjakobi@math.uni-bielefeld.de>y
> ---
>  drivers/gpu/drm/exynos/exynos_drm_crtc.c  | 31 ++++++++++++------------
>  drivers/gpu/drm/exynos/exynos_drm_plane.c | 40 +++++++++++++++++++++++--------
>  drivers/gpu/drm/exynos/exynos_drm_plane.h |  2 +-
>  3 files changed, 47 insertions(+), 26 deletions(-)
> 
> diff --git a/drivers/gpu/drm/exynos/exynos_drm_crtc.c b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
> index 363b019..ba44c9b 100644
> --- a/drivers/gpu/drm/exynos/exynos_drm_crtc.c
> +++ b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
> @@ -116,6 +116,7 @@ static int exynos_drm_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
>  	struct drm_framebuffer *fb = crtc->primary->fb;
>  	unsigned int crtc_w;
>  	unsigned int crtc_h;
> +	int ret;
>  
>  	/* when framebuffer changing is requested, crtc's dpms should be on */
>  	if (exynos_crtc->dpms > DRM_MODE_DPMS_ON) {
> @@ -123,12 +124,17 @@ static int exynos_drm_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
>  		return -EPERM;
>  	}
>  
> +	ret = exynos_check_plane(crtc->primary, fb);
> +	if (ret)
> +		return ret;
> +
>  	crtc_w = fb->width - x;
>  	crtc_h = fb->height - y;
> +	exynos_update_plane(crtc->primary, crtc, fb, 0, 0,
> +			    crtc_w, crtc_h, x << 16, y << 16,
> +			    crtc_w << 16, crtc_h << 16);
>  
> -	return exynos_update_plane(crtc->primary, crtc, fb, 0, 0,
> -				   crtc_w, crtc_h, x << 16, y << 16,
> -				   crtc_w << 16, crtc_h << 16);
> +	return 0;
>  }
>  
>  static void exynos_drm_crtc_disable(struct drm_crtc *crtc)
> @@ -165,7 +171,6 @@ static int exynos_drm_crtc_page_flip(struct drm_crtc *crtc,
>  {
>  	struct drm_device *dev = crtc->dev;
>  	struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
> -	struct drm_framebuffer *old_fb = crtc->primary->fb;
>  	unsigned int crtc_w, crtc_h;
>  	int ret;
>  
> @@ -184,6 +189,10 @@ static int exynos_drm_crtc_page_flip(struct drm_crtc *crtc,
>  		goto out;
>  	}
>  
> +	ret = exynos_check_plane(crtc->primary, fb);
> +	if (ret)
> +		goto out;
> +
>  	ret = drm_vblank_get(dev, exynos_crtc->pipe);
>  	if (ret) {
>  		DRM_DEBUG("failed to acquire vblank counter\n");
> @@ -202,17 +211,9 @@ static int exynos_drm_crtc_page_flip(struct drm_crtc *crtc,
>  	crtc->primary->fb = fb;
>  	crtc_w = fb->width - crtc->x;
>  	crtc_h = fb->height - crtc->y;
> -	ret = exynos_update_plane(crtc->primary, crtc, fb, 0, 0,
> -				  crtc_w, crtc_h, crtc->x << 16, crtc->y << 16,
> -				  crtc_w << 16, crtc_h << 16);
> -	if (ret) {
> -		crtc->primary->fb = old_fb;
> -		spin_lock_irq(&dev->event_lock);
> -		exynos_crtc->event = NULL;
> -		drm_vblank_put(dev, exynos_crtc->pipe);
> -		spin_unlock_irq(&dev->event_lock);
> -		return ret;
> -	}
> +	exynos_update_plane(crtc->primary, crtc, fb, 0, 0,
> +			    crtc_w, crtc_h, crtc->x << 16, crtc->y << 16,
> +			    crtc_w << 16, crtc_h << 16);
>  
>  	return 0;
>  
> diff --git a/drivers/gpu/drm/exynos/exynos_drm_plane.c b/drivers/gpu/drm/exynos/exynos_drm_plane.c
> index b1180fb..b218b7a 100644
> --- a/drivers/gpu/drm/exynos/exynos_drm_plane.c
> +++ b/drivers/gpu/drm/exynos/exynos_drm_plane.c
> @@ -144,21 +144,15 @@ void exynos_plane_mode_set(struct drm_plane *plane, struct drm_crtc *crtc,
>  	plane->crtc = crtc;
>  }
>  
> -int
> +void
>  exynos_update_plane(struct drm_plane *plane, struct drm_crtc *crtc,
>  		     struct drm_framebuffer *fb, int crtc_x, int crtc_y,
>  		     unsigned int crtc_w, unsigned int crtc_h,
>  		     uint32_t src_x, uint32_t src_y,
>  		     uint32_t src_w, uint32_t src_h)
>  {
> -
>  	struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
>  	struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
> -	int ret;
> -
> -	ret = exynos_check_plane(plane, fb);
> -	if (ret < 0)
> -		return ret;
>  
>  	exynos_plane_mode_set(plane, crtc, fb, crtc_x, crtc_y,
>  			      crtc_w, crtc_h, src_x >> 16, src_y >> 16,
> @@ -166,8 +160,6 @@ exynos_update_plane(struct drm_plane *plane, struct drm_crtc *crtc,
>  
>  	if (exynos_crtc->ops->win_commit)
>  		exynos_crtc->ops->win_commit(exynos_crtc, exynos_plane->zpos);
> -
> -	return 0;
>  }
>  
>  static int exynos_disable_plane(struct drm_plane *plane)
> @@ -183,11 +175,37 @@ static int exynos_disable_plane(struct drm_plane *plane)
>  }
>  
>  static struct drm_plane_funcs exynos_plane_funcs = {
> -	.update_plane	= exynos_update_plane,
> +	.update_plane	= drm_plane_helper_update,
>  	.disable_plane	= exynos_disable_plane,
>  	.destroy	= drm_plane_cleanup,
>  };
>  
> +static int exynos_plane_atomic_check(struct drm_plane *plane,
> +				     struct drm_plane_state *state)
> +{
> +	return exynos_check_plane(plane, state->fb);
> +}
> +
> +static void exynos_plane_atomic_update(struct drm_plane *plane,
> +				       struct drm_plane_state *old_state)
> +{
> +	struct drm_plane_state *state = plane->state;
> +
> +	if (!state->crtc)
> +		return;
> +
> +	exynos_update_plane(plane, state->crtc, state->fb,
> +			    state->crtc_x, state->crtc_y,
> +			    state->crtc_w, state->crtc_h,
> +			    state->src_x >> 16, state->src_y >> 16,
> +			    state->src_w >> 16, state->src_h >> 16);

should be

+                           state->src_x, state->src_y,
+                           state->src_w, state->src_h);
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