diff options
Diffstat (limited to 'drivers/gpu/drm')
| -rw-r--r-- | drivers/gpu/drm/drm_debugfs_crc.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_debugfs_crc.c b/drivers/gpu/drm/drm_debugfs_crc.c index 9dd879589a2c..9f8312137cad 100644 --- a/drivers/gpu/drm/drm_debugfs_crc.c +++ b/drivers/gpu/drm/drm_debugfs_crc.c @@ -307,10 +307,29 @@ static ssize_t crtc_crc_read(struct file *filep, char __user *user_buf, return LINE_LEN(crc->values_cnt); } +static unsigned int crtc_crc_poll(struct file *file, poll_table *wait) +{ + struct drm_crtc *crtc = file->f_inode->i_private; + struct drm_crtc_crc *crc = &crtc->crc; + unsigned ret; + + poll_wait(file, &crc->wq, wait); + + spin_lock_irq(&crc->lock); + if (crc->source && crtc_crc_data_count(crc)) + ret = POLLIN | POLLRDNORM; + else + ret = 0; + spin_unlock_irq(&crc->lock); + + return ret; +} + static const struct file_operations drm_crtc_crc_data_fops = { .owner = THIS_MODULE, .open = crtc_crc_open, .read = crtc_crc_read, + .poll = crtc_crc_poll, .release = crtc_crc_release, }; |