Instead of using an integer to keep count of how many buffers have
been handed over to the ISP (buffers_in_css) move buffers handed
over to the ISP to a new buffers_in_css list_head so that we can
easily loop over them.
This removes the need for atomisp_flush_video_pipe() to loop over
all buffers and then (ab)use the state to figure out if they
were handed over to the ISP.
Since the buffers are now always on a list when owned by the driver
this also allows the buffer_done path on flush vs normal completion
to be unified (both now need a list_del()) and this common code can
now be factored out into a new atomisp_buffer_done() helper.
This is a preparation patch for moving the driver over to
the videobuf2 framework.
Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
---
.../staging/media/atomisp/pci/atomisp_cmd.c | 91 ++++++++++---------
.../staging/media/atomisp/pci/atomisp_cmd.h | 4 +
.../staging/media/atomisp/pci/atomisp_fops.c | 24 ++---
.../staging/media/atomisp/pci/atomisp_ioctl.c | 2 +-
.../media/atomisp/pci/atomisp_subdev.c | 1 +
.../media/atomisp/pci/atomisp_subdev.h | 4 +-
6 files changed, 72 insertions(+), 54 deletions(-)
diff --git a/drivers/staging/media/atomisp/pci/atomisp_cmd.c b/drivers/staging/media/atomisp/pci/atomisp_cmd.c
index 0d3a4ff99730..5f0bebefcadd 100644
--- a/drivers/staging/media/atomisp/pci/atomisp_cmd.c
+++ b/drivers/staging/media/atomisp/pci/atomisp_cmd.c
@@ -634,10 +634,6 @@ void atomisp_clear_css_buffer_counters(struct atomisp_sub_device *asd)
memset(asd->metadata_bufs_in_css[i], 0,
sizeof(asd->metadata_bufs_in_css[i]));
asd->dis_bufs_in_css = 0;
- asd->video_out_capture.buffers_in_css = 0;
- asd->video_out_vf.buffers_in_css = 0;
- asd->video_out_preview.buffers_in_css = 0;
- asd->video_out_video_capture.buffers_in_css = 0;
}
/* 0x100000 is the start of dmem inside SP */
@@ -683,40 +679,65 @@ static struct videobuf_buffer *atomisp_css_frame_to_vbuf(
return NULL;
}
-static void atomisp_flush_video_pipe(struct atomisp_sub_device *asd,
- struct atomisp_video_pipe *pipe)
+int atomisp_buffers_in_css(struct atomisp_video_pipe *pipe)
{
unsigned long irqflags;
- int i;
+ struct list_head *pos;
+ int buffers_in_css = 0;
- if (!pipe->users)
- return;
+ spin_lock_irqsave(&pipe->irq_lock, irqflags);
- for (i = 0; pipe->capq.bufs[i]; i++) {
- spin_lock_irqsave(&pipe->irq_lock, irqflags);
- if (pipe->capq.bufs[i]->state == VIDEOBUF_ACTIVE ||
- pipe->capq.bufs[i]->state == VIDEOBUF_QUEUED) {
- pipe->capq.bufs[i]->ts = ktime_get_ns();
- pipe->capq.bufs[i]->field_count =
- atomic_read(&asd->sequence) << 1;
- dev_dbg(asd->isp->dev, "release buffers on device %s\n",
- pipe->vdev.name);
- if (pipe->capq.bufs[i]->state == VIDEOBUF_QUEUED)
- list_del_init(&pipe->capq.bufs[i]->queue);
- pipe->capq.bufs[i]->state = VIDEOBUF_ERROR;
- wake_up(&pipe->capq.bufs[i]->done);
- }
- spin_unlock_irqrestore(&pipe->irq_lock, irqflags);
+ list_for_each(pos, &pipe->buffers_in_css)
+ buffers_in_css++;
+
+ spin_unlock_irqrestore(&pipe->irq_lock, irqflags);
+
+ return buffers_in_css;
+}
+
+void atomisp_buffer_done(struct atomisp_video_pipe *pipe, struct videobuf_buffer *vb,
+ int state)
+{
+ lockdep_assert_held(&pipe->irq_lock);
+
+ vb->ts = ktime_get_ns();
+ vb->field_count = atomic_read(&pipe->asd->sequence) << 1;
+ vb->state = state;
+ list_del(&vb->queue);
+ wake_up(&vb->done);
+}
+
+void atomisp_flush_video_pipe(struct atomisp_video_pipe *pipe, bool warn_on_css_frames)
+{
+ struct videobuf_buffer *_vb, *vb;
+ unsigned long irqflags;
+
+ spin_lock_irqsave(&pipe->irq_lock, irqflags);
+
+ list_for_each_entry_safe(vb, _vb, &pipe->buffers_in_css, queue) {
+ if (warn_on_css_frames)
+ dev_warn(pipe->isp->dev, "Warning: CSS frames queued on flush\n");
+ atomisp_buffer_done(pipe, vb, VIDEOBUF_ERROR);
+ }
+
+ list_for_each_entry_safe(vb, _vb, &pipe->activeq, queue)
+ atomisp_buffer_done(pipe, vb, VIDEOBUF_ERROR);
+
+ list_for_each_entry_safe(vb, _vb, &pipe->buffers_waiting_for_param, queue) {
+ pipe->frame_request_config_id[vb->i] = 0;
+ atomisp_buffer_done(pipe, vb, VIDEOBUF_ERROR);
}
+
+ spin_unlock_irqrestore(&pipe->irq_lock, irqflags);
}
/* Returns queued buffers back to video-core */
void atomisp_flush_bufs_and_wakeup(struct atomisp_sub_device *asd)
{
- atomisp_flush_video_pipe(asd, &asd->video_out_capture);
- atomisp_flush_video_pipe(asd, &asd->video_out_vf);
- atomisp_flush_video_pipe(asd, &asd->video_out_preview);
- atomisp_flush_video_pipe(asd, &asd->video_out_video_capture);
+ atomisp_flush_video_pipe(&asd->video_out_capture, false);
+ atomisp_flush_video_pipe(&asd->video_out_vf, false);
+ atomisp_flush_video_pipe(&asd->video_out_preview, false);
+ atomisp_flush_video_pipe(&asd->video_out_video_capture, false);
}
/* clean out the parameters that did not apply */
@@ -974,7 +995,6 @@ void atomisp_buf_done(struct atomisp_sub_device *asd, int error,
break;
case IA_CSS_BUFFER_TYPE_VF_OUTPUT_FRAME:
case IA_CSS_BUFFER_TYPE_SEC_VF_OUTPUT_FRAME:
- pipe->buffers_in_css--;
frame = buffer.css_buffer.data.frame;
if (!frame) {
WARN_ON(1);
@@ -1026,7 +1046,6 @@ void atomisp_buf_done(struct atomisp_sub_device *asd, int error,
break;
case IA_CSS_BUFFER_TYPE_OUTPUT_FRAME:
case IA_CSS_BUFFER_TYPE_SEC_OUTPUT_FRAME:
- pipe->buffers_in_css--;
frame = buffer.css_buffer.data.frame;
if (!frame) {
WARN_ON(1);
@@ -1179,19 +1198,9 @@ void atomisp_buf_done(struct atomisp_sub_device *asd, int error,
break;
}
if (vb) {
- vb->ts = ktime_get_ns();
- vb->field_count = atomic_read(&asd->sequence) << 1;
- /*mark videobuffer done for dequeue*/
spin_lock_irqsave(&pipe->irq_lock, irqflags);
- vb->state = !error ? VIDEOBUF_DONE : VIDEOBUF_ERROR;
+ atomisp_buffer_done(pipe, vb, error ? VIDEOBUF_ERROR : VIDEOBUF_DONE);
spin_unlock_irqrestore(&pipe->irq_lock, irqflags);
-
- /*
- * Frame capture done, wake up any process block on
- * current active buffer
- * possibly hold by videobuf_dqbuf()
- */
- wake_up(&vb->done);
}
/*
diff --git a/drivers/staging/media/atomisp/pci/atomisp_cmd.h b/drivers/staging/media/atomisp/pci/atomisp_cmd.h
index fc1cfda718e1..1b46f4e60924 100644
--- a/drivers/staging/media/atomisp/pci/atomisp_cmd.h
+++ b/drivers/staging/media/atomisp/pci/atomisp_cmd.h
@@ -55,6 +55,10 @@ void dump_sp_dmem(struct atomisp_device *isp, unsigned int addr,
struct camera_mipi_info *atomisp_to_sensor_mipi_info(struct v4l2_subdev *sd);
struct atomisp_video_pipe *atomisp_to_video_pipe(struct video_device *dev);
int atomisp_reset(struct atomisp_device *isp);
+int atomisp_buffers_in_css(struct atomisp_video_pipe *pipe);
+void atomisp_buffer_done(struct atomisp_video_pipe *pipe, struct videobuf_buffer *buf,
+ int state);
+void atomisp_flush_video_pipe(struct atomisp_video_pipe *pipe, bool warn_on_css_frames);
void atomisp_flush_bufs_and_wakeup(struct atomisp_sub_device *asd);
void atomisp_clear_css_buffer_counters(struct atomisp_sub_device *asd);
diff --git a/drivers/staging/media/atomisp/pci/atomisp_fops.c b/drivers/staging/media/atomisp/pci/atomisp_fops.c
index 3b833cd5b423..ac9aa8649635 100644
--- a/drivers/staging/media/atomisp/pci/atomisp_fops.c
+++ b/drivers/staging/media/atomisp/pci/atomisp_fops.c
@@ -217,7 +217,9 @@ static int atomisp_q_video_buffers_to_css(struct atomisp_sub_device *asd,
struct ia_css_dvs_grid_info *dvs_grid =
atomisp_css_get_dvs_grid_info(&asd->params.curr_grid_info);
unsigned long irqflags;
- int err = 0;
+ int space, err = 0;
+
+ lockdep_assert_held(&asd->isp->mutex);
if (WARN_ON(css_pipe_id >= IA_CSS_PIPE_ID_NUM))
return -EINVAL;
@@ -225,20 +227,21 @@ static int atomisp_q_video_buffers_to_css(struct atomisp_sub_device *asd,
if (pipe->stopping)
return -EINVAL;
- while (pipe->buffers_in_css < ATOMISP_CSS_Q_DEPTH) {
+ space = ATOMISP_CSS_Q_DEPTH - atomisp_buffers_in_css(pipe);
+ while (space--) {
struct videobuf_buffer *vb;
spin_lock_irqsave(&pipe->irq_lock, irqflags);
- if (list_empty(&pipe->activeq)) {
- spin_unlock_irqrestore(&pipe->irq_lock, irqflags);
- return -EINVAL;
+ vb = list_first_entry_or_null(&pipe->activeq, struct videobuf_buffer, queue);
+ if (vb) {
+ list_move_tail(&vb->queue, &pipe->buffers_in_css);
+ vb->state = VIDEOBUF_ACTIVE;
}
- vb = list_entry(pipe->activeq.next,
- struct videobuf_buffer, queue);
- list_del_init(&vb->queue);
- vb->state = VIDEOBUF_ACTIVE;
spin_unlock_irqrestore(&pipe->irq_lock, irqflags);
+ if (!vb)
+ return -EINVAL;
+
/*
* If there is a per_frame setting to apply on the buffer,
* do it before buffer en-queueing.
@@ -291,14 +294,13 @@ static int atomisp_q_video_buffers_to_css(struct atomisp_sub_device *asd,
css_buf_type, css_pipe_id);
if (err) {
spin_lock_irqsave(&pipe->irq_lock, irqflags);
- list_add_tail(&vb->queue, &pipe->activeq);
+ list_move_tail(&vb->queue, &pipe->activeq);
vb->state = VIDEOBUF_QUEUED;
spin_unlock_irqrestore(&pipe->irq_lock, irqflags);
dev_err(asd->isp->dev, "%s, css q fails: %d\n",
__func__, err);
return -EINVAL;
}
- pipe->buffers_in_css++;
/* enqueue 3A/DIS/metadata buffers */
if (asd->params.curr_grid_info.s3a_grid.enable &&
diff --git a/drivers/staging/media/atomisp/pci/atomisp_ioctl.c b/drivers/staging/media/atomisp/pci/atomisp_ioctl.c
index bf5249b0d3bd..1fffe49cf578 100644
--- a/drivers/staging/media/atomisp/pci/atomisp_ioctl.c
+++ b/drivers/staging/media/atomisp/pci/atomisp_ioctl.c
@@ -1764,7 +1764,7 @@ int atomisp_streamoff(struct file *file, void *fh, enum v4l2_buf_type type)
mutex_unlock(&isp->mutex);
/* wait max 1 second */
ret = wait_event_interruptible_timeout(pipe->capq.wait,
- pipe->buffers_in_css == 0, HZ);
+ atomisp_buffers_in_css(pipe) == 0, HZ);
mutex_lock(&isp->mutex);
pipe->stopping = false;
if (ret <= 0)
diff --git a/drivers/staging/media/atomisp/pci/atomisp_subdev.c b/drivers/staging/media/atomisp/pci/atomisp_subdev.c
index 847dfee6ad78..95dc4188309b 100644
--- a/drivers/staging/media/atomisp/pci/atomisp_subdev.c
+++ b/drivers/staging/media/atomisp/pci/atomisp_subdev.c
@@ -1064,6 +1064,7 @@ static void atomisp_init_subdev_pipe(struct atomisp_sub_device *asd,
pipe->asd = asd;
pipe->isp = asd->isp;
spin_lock_init(&pipe->irq_lock);
+ INIT_LIST_HEAD(&pipe->buffers_in_css);
INIT_LIST_HEAD(&pipe->activeq);
INIT_LIST_HEAD(&pipe->buffers_waiting_for_param);
INIT_LIST_HEAD(&pipe->per_frame_params);
diff --git a/drivers/staging/media/atomisp/pci/atomisp_subdev.h b/drivers/staging/media/atomisp/pci/atomisp_subdev.h
index 65c2f8664f9d..45b0c7341e84 100644
--- a/drivers/staging/media/atomisp/pci/atomisp_subdev.h
+++ b/drivers/staging/media/atomisp/pci/atomisp_subdev.h
@@ -70,6 +70,9 @@ struct atomisp_video_pipe {
enum v4l2_buf_type type;
struct media_pad pad;
struct videobuf_queue capq;
+ /* List of video-buffers handed over to the CSS */
+ struct list_head buffers_in_css;
+ /* List of video-buffers handed over to the driver, but not yet to the CSS */
struct list_head activeq;
/*
* the buffers waiting for per-frame parameters, this is only valid
@@ -83,7 +86,6 @@ struct atomisp_video_pipe {
unsigned int default_run_mode;
/* Set from streamoff to disallow queuing further buffers in CSS */
bool stopping;
- unsigned int buffers_in_css;
/*
* irq_lock is used to protect video buffer state change operations and
--
2.37.3
