diff options
| author | Thomas Zimmermann <tzimmermann@suse.de> | 2022-11-03 18:14:39 +0300 |
|---|---|---|
| committer | Thomas Zimmermann <tzimmermann@suse.de> | 2022-11-05 19:05:54 +0300 |
| commit | 3add5f97734d8cbb5e2035dca226f691eb2f12a2 (patch) | |
| tree | c2d3cbb69909e55ac58873f117bc724ade420ebc /drivers/gpu/drm | |
| parent | f231af498c29f3acbd4436f67a8c7de8a428fb0f (diff) | |
| download | linux-3add5f97734d8cbb5e2035dca226f691eb2f12a2.tar.xz | |
drm/fb-helper: Call fb_sync in I/O functions
Call struct fb_ops.fb_sync in drm_fbdev_{read,write}() to mimic the
behavior of fbdev. Fbdev implementations of fb_read and fb_write in
struct fb_ops invoke fb_sync to synchronize with outstanding operations
before I/O. Doing the same in DRM implementations will allow us to use
them throughout DRM drivers.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221103151446.2638-17-tzimmermann@suse.de
Diffstat (limited to 'drivers/gpu/drm')
| -rw-r--r-- | drivers/gpu/drm/drm_fb_helper.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c index f6d22cc4cd87..379e0d2f6719 100644 --- a/drivers/gpu/drm/drm_fb_helper.c +++ b/drivers/gpu/drm/drm_fb_helper.c @@ -2246,6 +2246,9 @@ static ssize_t drm_fbdev_fb_read(struct fb_info *info, char __user *buf, if (total_size - count < pos) count = total_size - pos; + if (info->fbops->fb_sync) + info->fbops->fb_sync(info); + if (drm_fbdev_use_iomem(info)) ret = fb_read_screen_base(info, buf, count, pos); else @@ -2327,6 +2330,9 @@ static ssize_t drm_fbdev_fb_write(struct fb_info *info, const char __user *buf, count = total_size - pos; } + if (info->fbops->fb_sync) + info->fbops->fb_sync(info); + /* * Copy to framebuffer even if we already logged an error. Emulates * the behavior of the original fbdev implementation. |