@@ -762,6 +762,8 @@ static void aspeed_video_irq_res_change(struct aspeed_video *video, ulong delay)
set_bit(VIDEO_RES_CHANGE, &video->flags);
clear_bit(VIDEO_FRAME_INPRG, &video->flags);
+ video->v4l2_input_status = V4L2_IN_ST_NO_SIGNAL;
+
aspeed_video_off(video);
aspeed_video_on(video);
aspeed_video_bufs_done(video, VB2_BUF_STATE_ERROR);
@@ -1889,7 +1891,6 @@ static void aspeed_video_resolution_work(struct work_struct *work)
struct delayed_work *dwork = to_delayed_work(work);
struct aspeed_video *video = container_of(dwork, struct aspeed_video,
res_work);
- u32 input_status = video->v4l2_input_status;
/* Exit early in case no clients remain */
if (test_bit(VIDEO_STOPPED, &video->flags))
@@ -1902,8 +1903,7 @@ static void aspeed_video_resolution_work(struct work_struct *work)
aspeed_video_get_resolution(video);
if (video->detected_timings.width != video->active_timings.width ||
- video->detected_timings.height != video->active_timings.height ||
- input_status != video->v4l2_input_status) {
+ video->detected_timings.height != video->active_timings.height) {
static const struct v4l2_event ev = {
.type = V4L2_EVENT_SOURCE_CHANGE,
.u.src_change.changes = V4L2_EVENT_SRC_CH_RESOLUTION,
If res-chg, VE_INTERRUPT_MODE_DETECT_WD irq will be raised. But v4l2_input_status won't be updated to no-signal immediately until aspeed_video_get_resolution() in aspeed_video_resolution_work(). During the period of time, aspeed_video_start_frame() could be called because it doesn't know signal becomes unstable now. If it goes with aspeed_video_init_regs() of aspeed_video_irq_res_change() simultaneously, it will mess up hw state. To fix this problem, v4l2_input_status is updated to no-signal immediately for VE_INTERRUPT_MODE_DETECT_WD irq. Fixes: d2b4387f3bdf ("media: platform: Add Aspeed Video Engine driver") Signed-off-by: Jammy Huang <jammy_huang@aspeedtech.com> Acked-by: Paul Menzel <pmenzel@molgen.mpg.de> --- v2: - update subject and commit message --- drivers/media/platform/aspeed-video.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)