[12/12] drm/fb-helper: Remove struct drm_fb_helper.fb_probe

Commit Message

Thomas Zimmermann Dec. 12, 2024, 5:08 p.m. UTC

The callback fb_probe in struct drm_fb_helper is unused. Remove it.
New drivers should set struct drm_driver.fbdev_probe instead and call
drm_client_setup() to instantiate in-kernel DRM clients.

Signed-off-by: Thomas Zimmermann <[e-mail]>
---
 drivers/gpu/drm/drm_fb_helper.c |  8 ++++----
 include/drm/drm_fb_helper.h     | 17 -----------------
 2 files changed, 4 insertions(+), 21 deletions(-)

Patch

diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
index e800b43cfbf1..d3626ac15ddc 100644
--- a/drivers/gpu/drm/drm_fb_helper.c
+++ b/drivers/gpu/drm/drm_fb_helper.c
@@ -1632,6 +1632,9 @@  static int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper)
 	struct fb_info *info;
 	int ret;
 
+	if (drm_WARN_ON(dev, !dev->driver->fbdev_probe))
+		return -EINVAL;
+
 	ret = drm_fb_helper_find_sizes(fb_helper, &sizes);
 	if (ret) {
 		/* First time: disable all crtc's.. */
@@ -1641,10 +1644,7 @@  static int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper)
 	}
 
 	/* push down into drivers */
-	if (dev->driver->fbdev_probe)
-		ret = dev->driver->fbdev_probe(fb_helper, &sizes);
-	else if (fb_helper->funcs)
-		ret = fb_helper->funcs->fb_probe(fb_helper, &sizes);
+	ret = dev->driver->fbdev_probe(fb_helper, &sizes);
 	if (ret < 0)
 		return ret;
 
diff --git a/include/drm/drm_fb_helper.h b/include/drm/drm_fb_helper.h
index 7de1abd2e0ea..44b1d82b1b5c 100644
--- a/include/drm/drm_fb_helper.h
+++ b/include/drm/drm_fb_helper.h
@@ -69,23 +69,6 @@  struct drm_fb_helper_surface_size {
  * Driver callbacks used by the fbdev emulation helper library.
  */
 struct drm_fb_helper_funcs {
-	/**
-	 * @fb_probe:
-	 *
-	 * Driver callback to allocate and initialize the fbdev info structure.
-	 * Furthermore it also needs to allocate the DRM framebuffer used to
-	 * back the fbdev.
-	 *
-	 * This callback is mandatory.
-	 *
-	 * RETURNS:
-	 *
-	 * The driver should return 0 on success and a negative error code on
-	 * failure.
-	 */
-	int (*fb_probe)(struct drm_fb_helper *helper,
-			struct drm_fb_helper_surface_size *sizes);
-
 	/**
 	 * @fb_dirty:
 	 *