V4L/DVB (6045): ivtv: fix handling of INITIALIZE_INPUT fw call
The CX2341X_ENC_INITIALIZE_INPUT firmware call requires careful handling,
otherwise the computer can freeze or the top-third of the screen can start
flickering. This patch ensures that CX2341X_ENC_INITIALIZE_INPUT is called
at the right time and in the right way.
In addition the stop capture handling was improved so that the last pending
DMA transfer is also processed. Otherwise this would be the first data that
arrived when a new capture was started which is not what you want.
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
diff --git a/drivers/media/video/ivtv/ivtv-fileops.c b/drivers/media/video/ivtv/ivtv-fileops.c
index 9e867b5..908e640 100644
--- a/drivers/media/video/ivtv/ivtv-fileops.c
+++ b/drivers/media/video/ivtv/ivtv-fileops.c
@@ -892,12 +892,20 @@
return -EBUSY;
}
+ if (!test_bit(IVTV_F_I_RADIO_USER, &itv->i_flags)) {
+ if (atomic_read(&itv->capturing) > 0) {
+ /* switching to radio while capture is
+ in progress is not polite */
+ kfree(item);
+ return -EBUSY;
+ }
+ }
+ /* Mark that the radio is being used. */
+ set_bit(IVTV_F_I_RADIO_USER, &itv->i_flags);
/* We have the radio */
ivtv_mute(itv);
/* Switch tuner to radio */
ivtv_call_i2c_clients(itv, AUDC_SET_RADIO, NULL);
- /* Mark that the radio is being used. */
- set_bit(IVTV_F_I_RADIO_USER, &itv->i_flags);
/* Select the correct audio input (i.e. radio tuner) */
ivtv_audio_set_io(itv);
if (itv->hw_flags & IVTV_HW_SAA711X)
@@ -931,13 +939,8 @@
void ivtv_unmute(struct ivtv *itv)
{
- /* initialize or refresh input */
- if (atomic_read(&itv->capturing) == 0)
- ivtv_vapi(itv, CX2341X_ENC_INITIALIZE_INPUT, 0);
-
- ivtv_msleep_timeout(100, 0);
-
if (atomic_read(&itv->capturing)) {
+ ivtv_msleep_timeout(100, 0);
ivtv_vapi(itv, CX2341X_ENC_MISC, 1, 12);
ivtv_vapi(itv, CX2341X_ENC_MUTE_AUDIO, 1, 0);
}
diff --git a/drivers/media/video/ivtv/ivtv-ioctl.c b/drivers/media/video/ivtv/ivtv-ioctl.c
index cee6c55..734f2d2 100644
--- a/drivers/media/video/ivtv/ivtv-ioctl.c
+++ b/drivers/media/video/ivtv/ivtv-ioctl.c
@@ -906,6 +906,9 @@
IVTV_DEBUG_INFO("Input unchanged\n");
break;
}
+ if (atomic_read(&itv->capturing) > 0) {
+ return -EBUSY;
+ }
IVTV_DEBUG_INFO("Changing input from %d to %d\n",
itv->active_input, inp);
diff --git a/drivers/media/video/ivtv/ivtv-streams.c b/drivers/media/video/ivtv/ivtv-streams.c
index 405e2e3..0582b9d 100644
--- a/drivers/media/video/ivtv/ivtv-streams.c
+++ b/drivers/media/video/ivtv/ivtv-streams.c
@@ -554,9 +554,10 @@
clear_bit(IVTV_F_I_EOS, &itv->i_flags);
/* Initialize Digitizer for Capture */
+ itv->video_dec_func(itv, VIDIOC_STREAMOFF, 0);
+ ivtv_msleep_timeout(300, 1);
ivtv_vapi(itv, CX2341X_ENC_INITIALIZE_INPUT, 0);
-
- ivtv_msleep_timeout(100, 0);
+ itv->video_dec_func(itv, VIDIOC_STREAMON, 0);
}
/* begin_capture */
@@ -713,7 +714,6 @@
int cap_type;
unsigned long then;
int stopmode;
- u32 data[CX2341X_MBOX_MAX_DATA];
if (s->v4l2dev == NULL)
return -EINVAL;
@@ -793,27 +793,9 @@
}
then = jiffies;
- /* Make sure DMA is complete */
- add_wait_queue(&s->waitq, &wait);
- do {
- /* check if DMA is pending */
- if ((s->type == IVTV_ENC_STREAM_TYPE_MPG) && /* MPG Only */
- (read_reg(IVTV_REG_DMASTATUS) & 0x02)) {
- /* Check for last DMA */
- ivtv_vapi_result(itv, data, CX2341X_ENC_GET_SEQ_END, 2, 0, 0);
- if (data[0] == 1) {
- IVTV_DEBUG_DMA("%s: Last DMA of size 0x%08x\n", s->name, data[1]);
- break;
- }
- } else if (read_reg(IVTV_REG_DMASTATUS) & 0x02) {
- break;
- }
- } while (!ivtv_msleep_timeout(10, 1) &&
- then + msecs_to_jiffies(2000) > jiffies);
-
- set_current_state(TASK_RUNNING);
- remove_wait_queue(&s->waitq, &wait);
+ /* Handle any pending interrupts */
+ ivtv_msleep_timeout(100, 1);
}
atomic_dec(&itv->capturing);
