diff options
| -rw-r--r-- | drivers/gpu/drm/drm_fb_helper.c | 9 | ||||
| -rw-r--r-- | drivers/video/fbdev/core/fb_defio.c | 16 | ||||
| -rw-r--r-- | include/linux/fb.h | 1 |
3 files changed, 25 insertions, 1 deletions
diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c index cdbf03e941b2..c0e9a977a3b3 100644 --- a/drivers/gpu/drm/drm_fb_helper.c +++ b/drivers/gpu/drm/drm_fb_helper.c @@ -599,9 +599,16 @@ static void drm_fb_helper_add_damage_clip(struct drm_fb_helper *helper, u32 x, u static void drm_fb_helper_damage(struct drm_fb_helper *helper, u32 x, u32 y, u32 width, u32 height) { + struct fb_info *info = helper->info; + drm_fb_helper_add_damage_clip(helper, x, y, width, height); - schedule_work(&helper->damage_work); + /* + * The current fbdev emulation only flushes buffers if a damage + * update is necessary. And we can assume that deferred I/O has + * been enabled as damage updates require deferred I/O for mmap. + */ + fb_deferred_io_schedule_flush(info); } /* diff --git a/drivers/video/fbdev/core/fb_defio.c b/drivers/video/fbdev/core/fb_defio.c index c730253ab85c..dec678f72a42 100644 --- a/drivers/video/fbdev/core/fb_defio.c +++ b/drivers/video/fbdev/core/fb_defio.c @@ -332,3 +332,19 @@ void fb_deferred_io_cleanup(struct fb_info *info) mutex_destroy(&fbdefio->lock); } EXPORT_SYMBOL_GPL(fb_deferred_io_cleanup); + +void fb_deferred_io_schedule_flush(struct fb_info *info) +{ + struct fb_deferred_io *fbdefio = info->fbdefio; + + if (WARN_ON_ONCE(!fbdefio)) + return; /* bug in driver logic */ + + /* + * There's no requirement from callers to schedule the + * flush immediately. Rather schedule the worker with a + * delay and let a few more writes pile up. + */ + schedule_delayed_work(&info->deferred_work, fbdefio->delay); +} +EXPORT_SYMBOL_GPL(fb_deferred_io_schedule_flush); diff --git a/include/linux/fb.h b/include/linux/fb.h index 0aff76bcbb00..731fad5e39fa 100644 --- a/include/linux/fb.h +++ b/include/linux/fb.h @@ -663,6 +663,7 @@ extern void fb_deferred_io_open(struct fb_info *info, struct inode *inode, struct file *file); extern void fb_deferred_io_cleanup(struct fb_info *info); +extern void fb_deferred_io_schedule_flush(struct fb_info *info); extern int fb_deferred_io_fsync(struct file *file, loff_t start, loff_t end, int datasync); |