[PATCH 05/23] drm: omapdrm: fb: Simplify mode command checks when creating framebuffer

[Laurent Pinchart]

Checks can be simplified based on the requirement that pitches must be
identical for all planes.

Signed-off-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
---
 drivers/gpu/drm/omapdrm/omap_fb.c | 51 ++++++++++++++++++++-------------------
 1 file changed, 26 insertions(+), 25 deletions(-)

diff --git a/drivers/gpu/drm/omapdrm/omap_fb.c b/drivers/gpu/drm/omapdrm/omap_fb.c
index 015b6a50c581..8629ba6ff9d7 100644
--- a/drivers/gpu/drm/omapdrm/omap_fb.c
+++ b/drivers/gpu/drm/omapdrm/omap_fb.c
@@ -407,6 +407,7 @@ struct drm_framebuffer *omap_framebuffer_init(struct drm_device *dev,
 	struct omap_framebuffer *omap_fb = NULL;
 	struct drm_framebuffer *fb = NULL;
 	const struct format *format = NULL;
+	unsigned int pitch = mode_cmd->pitches[0];
 	int ret, i;
 
 	DBG("create framebuffer: dev=%p, mode_cmd=%p (%dx%d@%4.4s)",
@@ -437,38 +438,38 @@ struct drm_framebuffer *omap_framebuffer_init(struct drm_device *dev,
 	omap_fb->format = format;
 	mutex_init(&omap_fb->lock);
 
-	for (i = 0; i < format->num_planes; i++) {
-		struct plane *plane = &omap_fb->planes[i];
-		int size, pitch = mode_cmd->pitches[i];
+	if (format->num_planes == 2 && pitch != mode_cmd->pitches[1]) {
+		dev_err(dev->dev, "pitches differ between planes 0 and 1\n");
+		ret = -EINVAL;
+		goto fail;
+	}
 
-		if (pitch < (mode_cmd->width * format->stride_bpp)) {
-			dev_err(dev->dev, "provided buffer pitch is too small! %d < %d\n",
-					pitch, mode_cmd->width * format->stride_bpp);
-			ret = -EINVAL;
-			goto fail;
-		}
+	if (pitch < mode_cmd->width * format->stride_bpp) {
+		dev_err(dev->dev,
+			"provided buffer pitch is too small! %u < %u\n",
+			pitch, mode_cmd->width * format->stride_bpp);
+		ret = -EINVAL;
+		goto fail;
+	}
 
-		if (pitch % format->stride_bpp != 0) {
-			dev_err(dev->dev,
-				"buffer pitch (%d bytes) is not a multiple of pixel size (%d bytes)\n",
-				pitch, format->stride_bpp);
-			ret = -EINVAL;
-			goto fail;
-		}
+	if (pitch % format->stride_bpp != 0) {
+		dev_err(dev->dev,
+			"buffer pitch (%u bytes) is not a multiple of pixel size (%u bytes)\n",
+			pitch, format->stride_bpp);
+		ret = -EINVAL;
+		goto fail;
+	}
+
+	for (i = 0; i < format->num_planes; i++) {
+		struct plane *plane = &omap_fb->planes[i];
+		unsigned int size;
 
 		size = pitch * mode_cmd->height / format->sub_y[i];
 
 		if (size > (omap_gem_mmap_size(bos[i]) - mode_cmd->offsets[i])) {
-			dev_err(dev->dev, "provided buffer object is too small! %d < %d\n",
-					bos[i]->size - mode_cmd->offsets[i], size);
-			ret = -EINVAL;
-			goto fail;
-		}
-
-		if (i > 0 && pitch != mode_cmd->pitches[i - 1]) {
 			dev_err(dev->dev,
-				"pitches are not the same between framebuffer planes %d != %d\n",
-				pitch, mode_cmd->pitches[i - 1]);
+				"provided buffer object is too small! %d < %d\n",
+				bos[i]->size - mode_cmd->offsets[i], size);
 			ret = -EINVAL;
 			goto fail;
 		}
-- 
2.7.3