drm/arm/hdlcd: replace drm->dev_private with drm_to_hdlcd_priv()

Using drm_device->dev_private is deprecated. Since we've switched to
devm_drm_dev_alloc(), struct drm_device is now embedded in struct
hdlcd_drm_private, hence we can use container_of() to get the struct
drm_device instance instead.
Signed-off-by: Danilo Krummrich <dakr@redhat.com>
Signed-off-by: Liviu Dudau <liviu.dudau@arm.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221026153431.72033-3-dakr@redhat.com

drivers/gpu/drm/arm/hdlcd_crtc.c

@@ -274,7 +274,7 @@ static void hdlcd_plane_atomic_update(struct drm_plane *plane,
 	dest_h = drm_rect_height(&new_plane_state->dst);
 	scanout_start = drm_fb_dma_get_gem_addr(fb, new_plane_state, 0);
 
-	hdlcd = plane->dev->dev_private;
+	hdlcd = drm_to_hdlcd_priv(plane->dev);
 	hdlcd_write(hdlcd, HDLCD_REG_FB_LINE_LENGTH, fb->pitches[0]);
 	hdlcd_write(hdlcd, HDLCD_REG_FB_LINE_PITCH, fb->pitches[0]);
 	hdlcd_write(hdlcd, HDLCD_REG_FB_LINE_COUNT, dest_h - 1);
@@ -297,7 +297,7 @@ static const struct drm_plane_funcs hdlcd_plane_funcs = {
 
 static struct drm_plane *hdlcd_plane_init(struct drm_device *drm)
 {
-	struct hdlcd_drm_private *hdlcd = drm->dev_private;
+	struct hdlcd_drm_private *hdlcd = drm_to_hdlcd_priv(drm);
 	struct drm_plane *plane = NULL;
 	u32 formats[ARRAY_SIZE(supported_formats)], i;
 	int ret;
@@ -324,7 +324,7 @@ static struct drm_plane *hdlcd_plane_init(struct drm_device *drm)
 
 int hdlcd_setup_crtc(struct drm_device *drm)
 {
-	struct hdlcd_drm_private *hdlcd = drm->dev_private;
+	struct hdlcd_drm_private *hdlcd = drm_to_hdlcd_priv(drm);
 	struct drm_plane *primary;
 	int ret;
 

drivers/gpu/drm/arm/hdlcd_drv.c

@@ -98,7 +98,7 @@ static void hdlcd_irq_uninstall(struct hdlcd_drm_private *hdlcd)
 
 static int hdlcd_load(struct drm_device *drm, unsigned long flags)
 {
-	struct hdlcd_drm_private *hdlcd = drm->dev_private;
+	struct hdlcd_drm_private *hdlcd = drm_to_hdlcd_priv(drm);
 	struct platform_device *pdev = to_platform_device(drm->dev);
 	struct resource *res;
 	u32 version;
@@ -190,7 +190,7 @@ static int hdlcd_show_underrun_count(struct seq_file *m, void *arg)
 {
 	struct drm_info_node *node = (struct drm_info_node *)m->private;
 	struct drm_device *drm = node->minor->dev;
-	struct hdlcd_drm_private *hdlcd = drm->dev_private;
+	struct hdlcd_drm_private *hdlcd = drm_to_hdlcd_priv(drm);
 
 	seq_printf(m, "underrun : %d\n", atomic_read(&hdlcd->buffer_underrun_count));
 	seq_printf(m, "dma_end  : %d\n", atomic_read(&hdlcd->dma_end_count));
@@ -203,7 +203,7 @@ static int hdlcd_show_pxlclock(struct seq_file *m, void *arg)
 {
 	struct drm_info_node *node = (struct drm_info_node *)m->private;
 	struct drm_device *drm = node->minor->dev;
-	struct hdlcd_drm_private *hdlcd = drm->dev_private;
+	struct hdlcd_drm_private *hdlcd = drm_to_hdlcd_priv(drm);
 	unsigned long clkrate = clk_get_rate(hdlcd->clk);
 	unsigned long mode_clock = hdlcd->crtc.mode.crtc_clock * 1000;
 
@@ -253,7 +253,6 @@ static int hdlcd_drm_bind(struct device *dev)
 
 	drm = &hdlcd->base;
 
-	drm->dev_private = hdlcd;
 	dev_set_drvdata(dev, drm);
 
 	hdlcd_setup_mode_config(drm);
@@ -324,7 +323,7 @@ static int hdlcd_drm_bind(struct device *dev)
 static void hdlcd_drm_unbind(struct device *dev)
 {
 	struct drm_device *drm = dev_get_drvdata(dev);
-	struct hdlcd_drm_private *hdlcd = drm->dev_private;
+	struct hdlcd_drm_private *hdlcd = drm_to_hdlcd_priv(drm);
 
 	drm_dev_unregister(drm);
 	drm_kms_helper_poll_fini(drm);
@@ -339,7 +338,6 @@ static void hdlcd_drm_unbind(struct device *dev)
 		pm_runtime_disable(dev);
 	of_reserved_mem_device_release(dev);
 	drm_mode_config_cleanup(drm);
-	drm->dev_private = NULL;
 	dev_set_drvdata(dev, NULL);
 }
 

drivers/gpu/drm/arm/hdlcd_drv.h

@@ -21,6 +21,7 @@ struct hdlcd_drm_private {
 #endif
 };
 
+#define drm_to_hdlcd_priv(x)	container_of(x, struct hdlcd_drm_private, base)
 #define crtc_to_hdlcd_priv(x)	container_of(x, struct hdlcd_drm_private, crtc)
 
 static inline void hdlcd_write(struct hdlcd_drm_private *hdlcd,