drm/rockchip: use generic fbdev setup

The Rockchip fbdev code does not add anything compared to
drm_fbdev_generic_setup(); the one custom function for .fb_mmap does the
same thing as gem_prime_mmap which is called by the helper.

Signed-off-by: John Keeping <john@metanate.com>
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20211029115014.264084-1-john@metanate.com

Author: johnkeeping

drivers/gpu/drm/rockchip/Makefile

@@ -5,7 +5,6 @@
 
 rockchipdrm-y := rockchip_drm_drv.o rockchip_drm_fb.o \
 		rockchip_drm_gem.o rockchip_drm_vop.o rockchip_vop_reg.o
-rockchipdrm-$(CONFIG_DRM_FBDEV_EMULATION) += rockchip_drm_fbdev.o
 
 rockchipdrm-$(CONFIG_ROCKCHIP_ANALOGIX_DP) += analogix_dp-rockchip.o
 rockchipdrm-$(CONFIG_ROCKCHIP_CDN_DP) += cdn-dp-core.o cdn-dp-reg.o

drivers/gpu/drm/rockchip/rockchip_drm_drv.c

@@ -26,7 +26,6 @@
 
 #include "rockchip_drm_drv.h"
 #include "rockchip_drm_fb.h"
-#include "rockchip_drm_fbdev.h"
 #include "rockchip_drm_gem.h"
 
 #define DRIVER_NAME	"rockchip"
@@ -159,21 +158,18 @@ static int rockchip_drm_bind(struct device *dev)
 
 	drm_mode_config_reset(drm_dev);
 
-	ret = rockchip_drm_fbdev_init(drm_dev);
-	if (ret)
-		goto err_unbind_all;
-
 	/* init kms poll for handling hpd */
 	drm_kms_helper_poll_init(drm_dev);
 
 	ret = drm_dev_register(drm_dev, 0);
 	if (ret)
 		goto err_kms_helper_poll_fini;
 
+	drm_fbdev_generic_setup(drm_dev, 32);
+
 	return 0;
 err_kms_helper_poll_fini:
 	drm_kms_helper_poll_fini(drm_dev);
-	rockchip_drm_fbdev_fini(drm_dev);
 err_unbind_all:
 	component_unbind_all(dev, drm_dev);
 err_iommu_cleanup:
@@ -189,7 +185,6 @@ static void rockchip_drm_unbind(struct device *dev)
 
 	drm_dev_unregister(drm_dev);
 
-	rockchip_drm_fbdev_fini(drm_dev);
 	drm_kms_helper_poll_fini(drm_dev);
 
 	drm_atomic_helper_shutdown(drm_dev);
@@ -203,7 +198,6 @@ DEFINE_DRM_GEM_FOPS(rockchip_drm_driver_fops);
 
 static const struct drm_driver rockchip_drm_driver = {
 	.driver_features	= DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC,
-	.lastclose		= drm_fb_helper_lastclose,
 	.dumb_create		= rockchip_gem_dumb_create,
 	.prime_handle_to_fd	= drm_gem_prime_handle_to_fd,
 	.prime_fd_to_handle	= drm_gem_prime_fd_to_handle,

drivers/gpu/drm/rockchip/rockchip_drm_drv.h

@@ -43,8 +43,6 @@ struct rockchip_crtc_state {
  * @mm_lock: protect drm_mm on multi-threads.
  */
 struct rockchip_drm_private {
-	struct drm_fb_helper fbdev_helper;
-	struct drm_gem_object *fbdev_bo;
 	struct iommu_domain *domain;
 	struct mutex mm_lock;
 	struct drm_mm mm;