drm/fourcc: Pass the format_info pointer to drm_format_plane_width/height

So far, the drm_format_plane_height/width functions were operating on the
format's fourcc and was doing a lookup to retrieve the drm_format_info
structure and return the cpp.

However, this is inefficient since in most cases, we will have the
drm_format_info pointer already available so we shouldn't have to perform a
new lookup. Some drm_fourcc functions also already operate on the
drm_format_info pointer for that reason, so the API is quite inconsistent
there.

Let's follow the latter pattern and remove the extra lookup while being a
bit more consistent.

In order to be extra consistent, also rename that function to
drm_format_info_plane_cpp and to a static function in the header to match
the current policy. The parameters order have also be changed to match the
other functions prototype.

Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
Reviewed-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Link: https://patchwork.freedesktop.org/patch/msgid/514af1d489d80b8b1767e3716b663ce5103da6eb.1558002671.git-series.maxime.ripard@bootlin.com

2 files changed, 6 insertions, 54 deletions

diff --git a/drivers/gpu/drm/drm_fourcc.c b/drivers/gpu/drm/drm_fourcc.c
index 5f63fc74e265..35b459d186c5 100644
--- a/drivers/gpu/drm/drm_fourcc.c
+++ b/drivers/gpu/drm/drm_fourcc.c
@@ -333,54 +333,6 @@ drm_get_format_info(struct drm_device *dev,
 EXPORT_SYMBOL(drm_get_format_info);
 
 /**
- * drm_format_plane_width - width of the plane given the first plane
- * @width: width of the first plane
- * @format: pixel format
- * @plane: plane index
- *
- * Returns:
- * The width of @plane, given that the width of the first plane is @width.
- */
-int drm_format_plane_width(int width, uint32_t format, int plane)
-{
-	const struct drm_format_info *info;
-
-	info = drm_format_info(format);
-	if (!info || plane >= info->num_planes)
-		return 0;
-
-	if (plane == 0)
-		return width;
-
-	return width / info->hsub;
-}
-EXPORT_SYMBOL(drm_format_plane_width);
-
-/**
- * drm_format_plane_height - height of the plane given the first plane
- * @height: height of the first plane
- * @format: pixel format
- * @plane: plane index
- *
- * Returns:
- * The height of @plane, given that the height of the first plane is @height.
- */
-int drm_format_plane_height(int height, uint32_t format, int plane)
-{
-	const struct drm_format_info *info;
-
-	info = drm_format_info(format);
-	if (!info || plane >= info->num_planes)
-		return 0;
-
-	if (plane == 0)
-		return height;
-
-	return height / info->vsub;
-}
-EXPORT_SYMBOL(drm_format_plane_height);
-
-/**
  * drm_format_info_block_width - width in pixels of block.
  * @info: pixel format info
  * @plane: plane index
diff --git a/drivers/gpu/drm/meson/meson_overlay.c b/drivers/gpu/drm/meson/meson_overlay.c
index fb8515b2860c..55b3f2f2e608 100644
--- a/drivers/gpu/drm/meson/meson_overlay.c
+++ b/drivers/gpu/drm/meson/meson_overlay.c
@@ -466,8 +466,8 @@ static void meson_overlay_atomic_update(struct drm_plane *plane,
 		priv->viu.vd1_addr2 = gem->paddr + fb->offsets[2];
 		priv->viu.vd1_stride2 = fb->pitches[2];
 		priv->viu.vd1_height2 =
-			drm_format_plane_height(fb->height,
-						fb->format->format, 2);
+			drm_format_info_plane_height(fb->format,
+						fb->height, 2);
 		DRM_DEBUG("plane 2 addr 0x%x stride %d height %d\n",
 			 priv->viu.vd1_addr2,
 			 priv->viu.vd1_stride2,
@@ -478,8 +478,8 @@ static void meson_overlay_atomic_update(struct drm_plane *plane,
 		priv->viu.vd1_addr1 = gem->paddr + fb->offsets[1];
 		priv->viu.vd1_stride1 = fb->pitches[1];
 		priv->viu.vd1_height1 =
-			drm_format_plane_height(fb->height,
-						fb->format->format, 1);
+			drm_format_info_plane_height(fb->format,
+						fb->height, 1);
 		DRM_DEBUG("plane 1 addr 0x%x stride %d height %d\n",
 			 priv->viu.vd1_addr1,
 			 priv->viu.vd1_stride1,
@@ -490,8 +490,8 @@ static void meson_overlay_atomic_update(struct drm_plane *plane,
 		priv->viu.vd1_addr0 = gem->paddr + fb->offsets[0];
 		priv->viu.vd1_stride0 = fb->pitches[0];
 		priv->viu.vd1_height0 =
-			drm_format_plane_height(fb->height,
-						fb->format->format, 0);
+			drm_format_info_plane_height(fb->format,
+						fb->height, 0);
 		DRM_DEBUG("plane 0 addr 0x%x stride %d height %d\n",
 			 priv->viu.vd1_addr0,
 			 priv->viu.vd1_stride0,