diff options
| author | Thomas Zimmermann <tzimmermann@suse.de> | 2024-04-19 10:29:00 +0200 |
|---|---|---|
| committer | Thomas Zimmermann <tzimmermann@suse.de> | 2024-05-02 11:33:14 +0200 |
| commit | 747bda7bb5b1644a06734900326847a5d353c448 (patch) | |
| tree | 5e42495aa07faf354aaa93b3317ffcf7efa057c8 /drivers/video/fbdev | |
| parent | 1ecbc7dd29020d335e1f6f789c23b36a84cd5214 (diff) | |
fbdev/deferred-io: Provide get_page hook in struct fb_deferred_io
Add a callback for drivers to provide framebuffer pages to fbdev's
deferred-I/O helpers. Implementations need to acquire a reference on
the page before returning it. Returning NULL generates a SIGBUS
signal.
This will be useful for DRM's fbdev emulation with GEM-shmem buffer
objects.
v2:
- fix typo in commit message (Javier)
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240419083331.7761-8-tzimmermann@suse.de
Diffstat (limited to 'drivers/video/fbdev')
| -rw-r--r-- | drivers/video/fbdev/core/fb_defio.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/video/fbdev/core/fb_defio.c b/drivers/video/fbdev/core/fb_defio.c index c68c51d0ef70..5ee7e78c2cea 100644 --- a/drivers/video/fbdev/core/fb_defio.c +++ b/drivers/video/fbdev/core/fb_defio.c @@ -25,9 +25,13 @@ static struct page *fb_deferred_io_get_page(struct fb_info *info, unsigned long offs) { + struct fb_deferred_io *fbdefio = info->fbdefio; const void *screen_buffer = info->screen_buffer; struct page *page = NULL; + if (fbdefio->get_page) + return fbdefio->get_page(info, offs); + if (is_vmalloc_addr(screen_buffer + offs)) page = vmalloc_to_page(screen_buffer + offs); else if (info->fix.smem_start) |