[PATCH 02/11] drm/exynos: Use regular fbdev I/O helpers

[Thomas Zimmermann]

Use the regular fbdev helpers for framebuffer I/O instead of DRM's
helpers. Exynos does not use damage handling, so DRM's fbdev helpers
are mere wrappers around the fbdev code.

Add CONFIG_DRM_EXYNOS_FBDEV_EMULATION to select the necessary
Kconfig options automatically. Make fbdev emulation depend on
the new config option.

By using fbdev helpers directly within each DRM fbdev emulation,
we can eventually remove DRM's wrapper functions entirely.

Signed-off-by: Thomas Zimmermann <tzimmermann at suse.de>
Cc: Inki Dae <inki.dae at samsung.com>
Cc: Seung-Woo Kim <sw0312.kim at samsung.com>
Cc: Kyungmin Park <kyungmin.park at samsung.com>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski at linaro.org>
Cc: Alim Akhtar <alim.akhtar at samsung.com>
---
 drivers/gpu/drm/exynos/Kconfig            |  8 ++++++++
 drivers/gpu/drm/exynos/Makefile           |  2 +-
 drivers/gpu/drm/exynos/exynos_drm_fbdev.c | 10 +++++-----
 drivers/gpu/drm/exynos/exynos_drm_fbdev.h |  2 +-
 4 files changed, 15 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/exynos/Kconfig b/drivers/gpu/drm/exynos/Kconfig
index 0cb92d651ff1..c7ac07220e26 100644
--- a/drivers/gpu/drm/exynos/Kconfig
+++ b/drivers/gpu/drm/exynos/Kconfig
@@ -5,6 +5,7 @@ config DRM_EXYNOS
 	depends on ARCH_S3C64XX || ARCH_S5PV210 || ARCH_EXYNOS || COMPILE_TEST
 	depends on MMU
 	select DRM_DISPLAY_HELPER if DRM_EXYNOS_DP
+	select DRM_EXYNOS_FBDEV_EMULATION if DRM_FBDEV_EMULATION
 	select DRM_KMS_HELPER
 	select VIDEOMODE_HELPERS
 	select SND_SOC_HDMI_CODEC if SND_SOC
@@ -12,6 +13,13 @@ config DRM_EXYNOS
 	  Choose this option if you have a Samsung SoC Exynos chipset.
 	  If M is selected the module will be called exynosdrm.
 
+config DRM_EXYNOS_FBDEV_EMULATION
+	bool
+	depends on DRM_EXYNOS
+	select FB_CFB_COPYAREA
+	select FB_CFB_FILLRECT
+	select FB_CFB_IMAGEBLIT
+
 if DRM_EXYNOS
 
 comment "CRTCs"
diff --git a/drivers/gpu/drm/exynos/Makefile b/drivers/gpu/drm/exynos/Makefile
index 2fd2f3ee4fcf..a9278be4daf3 100644
--- a/drivers/gpu/drm/exynos/Makefile
+++ b/drivers/gpu/drm/exynos/Makefile
@@ -6,7 +6,7 @@
 exynosdrm-y := exynos_drm_drv.o exynos_drm_crtc.o exynos_drm_fb.o \
 		exynos_drm_gem.o exynos_drm_plane.o exynos_drm_dma.o
 
-exynosdrm-$(CONFIG_DRM_FBDEV_EMULATION) += exynos_drm_fbdev.o
+exynosdrm-$(CONFIG_DRM_EXYNOS_FBDEV_EMULATION)	+= exynos_drm_fbdev.o
 exynosdrm-$(CONFIG_DRM_EXYNOS_FIMD)	+= exynos_drm_fimd.o
 exynosdrm-$(CONFIG_DRM_EXYNOS5433_DECON)	+= exynos5433_drm_decon.o
 exynosdrm-$(CONFIG_DRM_EXYNOS7_DECON)	+= exynos7_drm_decon.o
diff --git a/drivers/gpu/drm/exynos/exynos_drm_fbdev.c b/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
index ea4b3d248aac..b3333dd1d087 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
@@ -8,6 +8,8 @@
  *	Seung-Woo Kim <sw0312.kim at samsung.com>
  */
 
+#include <linux/fb.h>
+
 #include <drm/drm_crtc_helper.h>
 #include <drm/drm_drv.h>
 #include <drm/drm_fb_helper.h>
@@ -49,11 +51,9 @@ static const struct fb_ops exynos_drm_fb_ops = {
 	.owner		= THIS_MODULE,
 	DRM_FB_HELPER_DEFAULT_OPS,
 	.fb_mmap        = exynos_drm_fb_mmap,
-	.fb_read	= drm_fb_helper_cfb_read,
-	.fb_write	= drm_fb_helper_cfb_write,
-	.fb_fillrect	= drm_fb_helper_cfb_fillrect,
-	.fb_copyarea	= drm_fb_helper_cfb_copyarea,
-	.fb_imageblit	= drm_fb_helper_cfb_imageblit,
+	.fb_fillrect	= cfb_fillrect,
+	.fb_copyarea	= cfb_copyarea,
+	.fb_imageblit	= cfb_imageblit,
 	.fb_destroy	= exynos_drm_fb_destroy,
 };
 
diff --git a/drivers/gpu/drm/exynos/exynos_drm_fbdev.h b/drivers/gpu/drm/exynos/exynos_drm_fbdev.h
index 1e1dea627cd9..9a8425881ff1 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_fbdev.h
+++ b/drivers/gpu/drm/exynos/exynos_drm_fbdev.h
@@ -11,7 +11,7 @@
 #ifndef _EXYNOS_DRM_FBDEV_H_
 #define _EXYNOS_DRM_FBDEV_H_
 
-#ifdef CONFIG_DRM_FBDEV_EMULATION
+#if defined(CONFIG_DRM_EXYNOS_FBDEV_EMULATION)
 void exynos_drm_fbdev_setup(struct drm_device *dev);
 #else
 static inline void exynos_drm_fbdev_setup(struct drm_device *dev)
-- 
2.40.1