drm/tegra: Use regular fbdev I/O helpers

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

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

v4:
	* use initializer macros for struct fb_ops
v2:
	* use FB_SYS_HELPERS option

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Mikko Perttunen <mperttunen@nvidia.com>
Cc: Jonathan Hunter <jonathanh@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230530151228.22979-10-tzimmermann@suse.de

diff --git a/drivers/gpu/drm/tegra/Kconfig b/drivers/gpu/drm/tegra/Kconfig
index 56453ca..4983137 100644 (file)
--- a/drivers/gpu/drm/tegra/Kconfig
+++ b/drivers/gpu/drm/tegra/Kconfig
@@ -12,6 +12,7 @@ config DRM_TEGRA
        select DRM_KMS_HELPER
        select DRM_MIPI_DSI
        select DRM_PANEL
+       select FB_SYS_HELPERS if DRM_FBDEV_EMULATION
        select TEGRA_HOST1X
        select INTERCONNECT
        select IOMMU_IOVA

diff --git a/drivers/gpu/drm/tegra/fbdev.c b/drivers/gpu/drm/tegra/fbdev.c
index dca9ecc..e74d9be 100644 (file)
--- a/drivers/gpu/drm/tegra/fbdev.c
+++ b/drivers/gpu/drm/tegra/fbdev.c
@@ -8,6 +8,7 @@
  */
 
 #include <linux/console.h>
+#include <linux/fb.h>
 #include <linux/vmalloc.h>
 
 #include <drm/drm_drv.h>
@@ -58,12 +59,9 @@ static void tegra_fbdev_fb_destroy(struct fb_info *info)
 
 static const struct fb_ops tegra_fb_ops = {
        .owner = THIS_MODULE,
+       __FB_DEFAULT_SYS_OPS_RDWR,
        DRM_FB_HELPER_DEFAULT_OPS,
-       .fb_read = drm_fb_helper_sys_read,
-       .fb_write = drm_fb_helper_sys_write,
-       .fb_fillrect = drm_fb_helper_sys_fillrect,
-       .fb_copyarea = drm_fb_helper_sys_copyarea,
-       .fb_imageblit = drm_fb_helper_sys_imageblit,
+       __FB_DEFAULT_SYS_OPS_DRAW,
        .fb_mmap = tegra_fb_mmap,
        .fb_destroy = tegra_fbdev_fb_destroy,
 };