drm/omapdrm: Remove fbdev from struct omap_drm_private

The DRM device stores a pointer to the fbdev helper. Remove struct
omap_drm_private.fbdev, which contains the same value. No functional
changes.

v2:
	* don't clear dev->fb_helper unnecessarily (Tomi)
	* include omap_fbdev.h in omap_fbdev.c (kernel test robot)

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230403104035.15288-5-tzimmermann@suse.de

drivers/gpu/drm/omapdrm/omap_debugfs.c

@@ -47,15 +47,15 @@ static int fb_show(struct seq_file *m, void *arg)
 {
 	struct drm_info_node *node = (struct drm_info_node *) m->private;
 	struct drm_device *dev = node->minor->dev;
-	struct omap_drm_private *priv = dev->dev_private;
+	struct drm_fb_helper *helper = dev->fb_helper;
 	struct drm_framebuffer *fb;
 
 	seq_printf(m, "fbcon ");
-	omap_framebuffer_describe(priv->fbdev->fb, m);
+	omap_framebuffer_describe(helper->fb, m);
 
 	mutex_lock(&dev->mode_config.fb_lock);
 	list_for_each_entry(fb, &dev->mode_config.fb_list, head) {
-		if (fb == priv->fbdev->fb)
+		if (fb == helper->fb)
 			continue;
 
 		seq_printf(m, "user ");

drivers/gpu/drm/omapdrm/omap_drv.c

@@ -25,6 +25,7 @@
 
 #include "omap_dmm_tiler.h"
 #include "omap_drv.h"
+#include "omap_fbdev.h"
 
 #define DRIVER_NAME		MODULE_NAME
 #define DRIVER_DESC		"OMAP DRM"

drivers/gpu/drm/omapdrm/omap_drv.h

@@ -21,7 +21,6 @@
 #include "omap_crtc.h"
 #include "omap_encoder.h"
 #include "omap_fb.h"
-#include "omap_fbdev.h"
 #include "omap_gem.h"
 #include "omap_irq.h"
 #include "omap_plane.h"
@@ -77,8 +76,6 @@ struct omap_drm_private {
 
 	struct drm_private_obj glob_obj;
 
-	struct drm_fb_helper *fbdev;
-
 	struct workqueue_struct *wq;
 
 	/* lock for obj_list below */

drivers/gpu/drm/omapdrm/omap_fbdev.c

@@ -13,6 +13,7 @@
 #include <drm/drm_gem_framebuffer_helper.h>
 
 #include "omap_drv.h"
+#include "omap_fbdev.h"
 
 MODULE_PARM_DESC(ywrap, "Enable ywrap scrolling (omap44xx and later, default 'y')");
 static bool ywrap_enabled = true;
@@ -250,8 +251,6 @@ void omap_fbdev_init(struct drm_device *dev)
 	if (ret)
 		goto fini;
 
-	priv->fbdev = helper;
-
 	return;
 
 fini:
@@ -265,8 +264,7 @@ void omap_fbdev_init(struct drm_device *dev)
 
 void omap_fbdev_fini(struct drm_device *dev)
 {
-	struct omap_drm_private *priv = dev->dev_private;
-	struct drm_fb_helper *helper = priv->fbdev;
+	struct drm_fb_helper *helper = dev->fb_helper;
 	struct drm_framebuffer *fb;
 	struct drm_gem_object *bo;
 	struct omap_fbdev *fbdev;
@@ -296,6 +294,4 @@ void omap_fbdev_fini(struct drm_device *dev)
 
 	drm_fb_helper_unprepare(helper);
 	kfree(fbdev);
-
-	priv->fbdev = NULL;
 }