drm/msm: Use new drm_fb_helper functions

Use the newly created wrapper drm_fb_helper functions instead of calling
core fbdev functions directly. They also simplify the fb_info creation.

Cc: Rob Clark <robdclark@gmail.com>
Cc: Stephane Viau <sviau@codeaurora.org>
Cc: Hai Li <hali@codeaurora.org>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/msm/msm_fbdev.c

@@ -43,11 +43,11 @@ static struct fb_ops msm_fb_ops = {
 	/* Note: to properly handle manual update displays, we wrap the
 	 * basic fbdev ops which write to the framebuffer
 	 */
-	.fb_read = fb_sys_read,
-	.fb_write = fb_sys_write,
-	.fb_fillrect = sys_fillrect,
-	.fb_copyarea = sys_copyarea,
-	.fb_imageblit = sys_imageblit,
+	.fb_read = drm_fb_helper_sys_read,
+	.fb_write = drm_fb_helper_sys_write,
+	.fb_fillrect = drm_fb_helper_sys_fillrect,
+	.fb_copyarea = drm_fb_helper_sys_copyarea,
+	.fb_imageblit = drm_fb_helper_sys_imageblit,
 	.fb_mmap = msm_fbdev_mmap,
 
 	.fb_check_var = drm_fb_helper_check_var,
@@ -144,10 +144,10 @@ static int msm_fbdev_create(struct drm_fb_helper *helper,
 		goto fail_unlock;
 	}
 
-	fbi = framebuffer_alloc(0, dev->dev);
-	if (!fbi) {
+	fbi = drm_fb_helper_alloc_fbi(helper);
+	if (IS_ERR(fbi)) {
 		dev_err(dev->dev, "failed to allocate fb info\n");
-		ret = -ENOMEM;
+		ret = PTR_ERR(fbi);
 		goto fail_unlock;
 	}
 
@@ -155,7 +155,6 @@ static int msm_fbdev_create(struct drm_fb_helper *helper,
 
 	fbdev->fb = fb;
 	helper->fb = fb;
-	helper->fbdev = fbi;
 
 	fbi->par = helper;
 	fbi->flags = FBINFO_DEFAULT;
@@ -163,12 +162,6 @@ static int msm_fbdev_create(struct drm_fb_helper *helper,
 
 	strcpy(fbi->fix.id, "msm");
 
-	ret = fb_alloc_cmap(&fbi->cmap, 256, 0);
-	if (ret) {
-		ret = -ENOMEM;
-		goto fail_unlock;
-	}
-
 	drm_fb_helper_fill_fix(fbi, fb->pitches[0], fb->depth);
 	drm_fb_helper_fill_var(fbi, helper, sizes->fb_width, sizes->fb_height);
 
@@ -191,7 +184,6 @@ static int msm_fbdev_create(struct drm_fb_helper *helper,
 fail:
 
 	if (ret) {
-		framebuffer_release(fbi);
 		if (fb) {
 			drm_framebuffer_unregister_private(fb);
 			drm_framebuffer_remove(fb);
@@ -266,17 +258,11 @@ void msm_fbdev_free(struct drm_device *dev)
 	struct msm_drm_private *priv = dev->dev_private;
 	struct drm_fb_helper *helper = priv->fbdev;
 	struct msm_fbdev *fbdev;
-	struct fb_info *fbi;
 
 	DBG();
 
-	fbi = helper->fbdev;
-
-	/* only cleanup framebuffer if it is present */
-	if (fbi) {
-		unregister_framebuffer(fbi);
-		framebuffer_release(fbi);
-	}
+	drm_fb_helper_unregister_fbi(helper);
+	drm_fb_helper_release_fbi(helper);
 
 	drm_fb_helper_fini(helper);