[Intel-gfx] [PATCH v5 09/13] drm/tegra: Use regular fbdev I/O helpers

Thomas Zimmermann
2023-05-30T15:03:40Z

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>
---
drivers/gpu/drm/tegra/Kconfig | 1 +
drivers/gpu/drm/tegra/fbdev.c | 8 +++-----
2 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/tegra/Kconfig b/drivers/gpu/drm/tegra/Kconfig
index 56453ca277c2..498313778175 100644
--- 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 dca9eccae466..e74d9be981c7 100644
--- 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,
};
--
2.40.1