imx-drm-core: Forward port the bits from 4.18

Signed-off-by: Guido Günther <guido.gunther@puri.sm>

drivers/gpu/drm/imx/imx-drm.h

-/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _IMX_DRM_H_
 #define _IMX_DRM_H_
 
+#define MAX_CRTC	4
+
 struct device_node;
 struct drm_crtc;
 struct drm_connector;
 struct drm_device;
 struct drm_display_mode;
 struct drm_encoder;
+struct drm_fbdev_cma;
 struct drm_framebuffer;
 struct drm_plane;
+struct imx_drm_crtc;
 struct platform_device;
 
+struct imx_drm_device {
+	struct drm_device			*drm;
+	struct imx_drm_crtc			*crtc[MAX_CRTC];
+	unsigned int				pipes;
+	struct drm_fbdev_cma			*fbhelper;
+	struct drm_atomic_state			*state;
+};
+
 struct imx_crtc_state {
 	struct drm_crtc_state			base;
 	u32					bus_format;
@@ -24,12 +35,23 @@ static inline struct imx_crtc_state *to_imx_crtc_state(struct drm_crtc_state *s)
 {
 	return container_of(s, struct imx_crtc_state, base);
 }
+
+struct imx_drm_crtc_helper_funcs {
+	int (*enable_vblank)(struct drm_crtc *crtc);
+	void (*disable_vblank)(struct drm_crtc *crtc);
+	const struct drm_crtc_helper_funcs *crtc_helper_funcs;
+	const struct drm_crtc_funcs *crtc_funcs;
+};
+
+int imx_drm_add_crtc(struct drm_device *drm, struct drm_crtc *crtc,
+		struct imx_drm_crtc **new_crtc, struct drm_plane *primary_plane,
+		const struct imx_drm_crtc_helper_funcs *imx_helper_funcs,
+		struct device_node *port);
+int imx_drm_remove_crtc(struct imx_drm_crtc *);
 int imx_drm_init_drm(struct platform_device *pdev,
 		int preferred_bpp);
 int imx_drm_exit_drm(void);
 
-extern struct platform_driver ipu_drm_driver;
-
 void imx_drm_mode_config_init(struct drm_device *drm);
 
 struct drm_gem_cma_object *imx_drm_fb_get_obj(struct drm_framebuffer *fb);
@@ -40,7 +62,4 @@ int imx_drm_encoder_parse_of(struct drm_device *drm,
 void imx_drm_connector_destroy(struct drm_connector *connector);
 void imx_drm_encoder_destroy(struct drm_encoder *encoder);
 
-int ipu_planes_assign_pre(struct drm_device *dev,
-			  struct drm_atomic_state *state);
-
 #endif /* _IMX_DRM_H_ */