drm/msm: Remove fbdev from struct msm_drm_private

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

v2:
	* test for fb_helper->fb in debugfs code
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/530559/
Link: https://lore.kernel.org/r/20230403124538.8497-6-tzimmermann@suse.deSigned-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

drivers/gpu/drm/msm/msm_debugfs.c

@@ -241,12 +241,11 @@ static int msm_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 msm_drm_private *priv = dev->dev_private;
 	struct drm_framebuffer *fb, *fbdev_fb = NULL;
 
-	if (priv->fbdev) {
+	if (dev->fb_helper && dev->fb_helper->fb) {
 		seq_printf(m, "fbcon ");
-		fbdev_fb = priv->fbdev->fb;
+		fbdev_fb = dev->fb_helper->fb;
 		msm_framebuffer_describe(fbdev_fb, m);
 	}
 

drivers/gpu/drm/msm/msm_drv.c

@@ -243,7 +243,7 @@ static int msm_drm_uninit(struct device *dev)
 	msm_rd_debugfs_cleanup(priv);
 
 #ifdef CONFIG_DRM_FBDEV_EMULATION
-	if (fbdev && priv->fbdev)
+	if (fbdev && ddev->fb_helper)
 		msm_fbdev_free(ddev);
 #endif
 
@@ -551,7 +551,7 @@ static int msm_drm_init(struct device *dev, const struct drm_driver *drv)
 
 #ifdef CONFIG_DRM_FBDEV_EMULATION
 	if (kms && fbdev)
-		priv->fbdev = msm_fbdev_init(ddev);
+		msm_fbdev_init(ddev);
 #endif
 
 	ret = msm_debugfs_late_init(ddev);

drivers/gpu/drm/msm/msm_drv.h

@@ -129,8 +129,6 @@ struct msm_drm_private {
 	bool is_a2xx;
 	bool has_cached_coherent;
 
-	struct drm_fb_helper *fbdev;
-
 	struct msm_rd_state *rd;       /* debugfs to dump all submits */
 	struct msm_rd_state *hangrd;   /* debugfs to dump hanging submits */
 	struct msm_perf_state *perf;

drivers/gpu/drm/msm/msm_fbdev.c

@@ -122,7 +122,6 @@ static const struct drm_fb_helper_funcs msm_fb_helper_funcs = {
 /* initialize fbdev helper */
 struct drm_fb_helper *msm_fbdev_init(struct drm_device *dev)
 {
-	struct msm_drm_private *priv = dev->dev_private;
 	struct drm_fb_helper *helper;
 	int ret;
 
@@ -142,8 +141,6 @@ struct drm_fb_helper *msm_fbdev_init(struct drm_device *dev)
 	if (ret)
 		goto fini;
 
-	priv->fbdev = helper;
-
 	return helper;
 
 fini:
@@ -156,8 +153,7 @@ struct drm_fb_helper *msm_fbdev_init(struct drm_device *dev)
 
 void msm_fbdev_free(struct drm_device *dev)
 {
-	struct msm_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 = helper->fb;
 
 	DBG();
@@ -176,5 +172,5 @@ void msm_fbdev_free(struct drm_device *dev)
 	drm_fb_helper_unprepare(helper);
 	kfree(helper);
 
-	priv->fbdev = NULL;
+	dev->fb_helper = NULL;
 }