drm/fb: remove unused function: drm_gem_fbdev_fb_create()

After migrating several drivers to the generic fbdev
emulation there are no users left of drm_gem_fbdev_fb_create.
Delete the function.

Noticed that there was no callers while browsing
around in the drm_fb* code.

The code that referenced the function was removed by:
commit 13aff18 ("drm/qxl: remove dead qxl fbdev emulation code")

The actual use was removed by:
commit 26d4707 ("drm/qxl: use generic fbdev emulation")

v2:
- Updated changelog based on feedback from Noralf

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Noralf Trønnes <noralf@tronnes.org>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20190721140610.GA20842@ravnborg.org

drivers/gpu/drm/drm_gem_framebuffer_helper.c

@@ -322,46 +322,3 @@ int drm_gem_fb_simple_display_pipe_prepare_fb(struct drm_simple_display_pipe *pi
 	return drm_gem_fb_prepare_fb(&pipe->plane, plane_state);
 }
 EXPORT_SYMBOL(drm_gem_fb_simple_display_pipe_prepare_fb);
-
-/**
- * drm_gem_fbdev_fb_create - Create a GEM backed &drm_framebuffer for fbdev
- *                           emulation
- * @dev: DRM device
- * @sizes: fbdev size description
- * @pitch_align: Optional pitch alignment
- * @obj: GEM object backing the framebuffer
- * @funcs: Optional vtable to be used for the new framebuffer object when the
- *         dirty callback is needed.
- *
- * This function creates a framebuffer from a &drm_fb_helper_surface_size
- * description for use in the &drm_fb_helper_funcs.fb_probe callback.
- *
- * Returns:
- * Pointer to a &drm_framebuffer on success or an error pointer on failure.
- */
-struct drm_framebuffer *
-drm_gem_fbdev_fb_create(struct drm_device *dev,
-			struct drm_fb_helper_surface_size *sizes,
-			unsigned int pitch_align, struct drm_gem_object *obj,
-			const struct drm_framebuffer_funcs *funcs)
-{
-	struct drm_mode_fb_cmd2 mode_cmd = { 0 };
-
-	mode_cmd.width = sizes->surface_width;
-	mode_cmd.height = sizes->surface_height;
-	mode_cmd.pitches[0] = sizes->surface_width *
-			      DIV_ROUND_UP(sizes->surface_bpp, 8);
-	if (pitch_align)
-		mode_cmd.pitches[0] = roundup(mode_cmd.pitches[0],
-					      pitch_align);
-	mode_cmd.pixel_format = drm_driver_legacy_fb_format(dev, sizes->surface_bpp,
-							    sizes->surface_depth);
-	if (obj->size < mode_cmd.pitches[0] * mode_cmd.height)
-		return ERR_PTR(-EINVAL);
-
-	if (!funcs)
-		funcs = &drm_gem_fb_funcs;
-
-	return drm_gem_fb_alloc(dev, &mode_cmd, &obj, 1, funcs);
-}
-EXPORT_SYMBOL(drm_gem_fbdev_fb_create);

include/drm/drm_gem_framebuffer_helper.h

@@ -33,11 +33,4 @@ int drm_gem_fb_prepare_fb(struct drm_plane *plane,
 			  struct drm_plane_state *state);
 int drm_gem_fb_simple_display_pipe_prepare_fb(struct drm_simple_display_pipe *pipe,
 					      struct drm_plane_state *plane_state);
-
-struct drm_framebuffer *
-drm_gem_fbdev_fb_create(struct drm_device *dev,
-			struct drm_fb_helper_surface_size *sizes,
-			unsigned int pitch_align, struct drm_gem_object *obj,
-			const struct drm_framebuffer_funcs *funcs);
-
 #endif