From: Hans Verkuil <hans.verk...@cisco.com>
This works together with the retry_start_streaming mechanism to allow userspace
to start streaming even if not all required buffers have been queued.
Signed-off-by: Hans Verkuil <hans.verk...@cisco.com>
Cc: Lad, Prabhakar <prabhakar.cse...@gmail.com>
Cc: Tomasz Stanislawski <t.stanisl...@samsung.com>
Cc: Kyungmin Park <kyungmin.p...@samsung.com>
Cc: Kamil Debski <k.deb...@samsung.com>
Cc: Guennadi Liakhovetski <g.liakhovet...@gmx.de>
---
drivers/media/platform/davinci/vpbe_display.c | 2 +-
drivers/media/platform/davinci/vpif_capture.c | 2 +-
drivers/media/platform/davinci/vpif_display.c | 2 +-
drivers/media/platform/s5p-mfc/s5p_mfc_enc.c | 2 +-
drivers/media/platform/s5p-tv/mixer_video.c | 2 +-
drivers/media/platform/soc_camera/mx2_camera.c | 2 +-
drivers/staging/media/davinci_vpfe/vpfe_video.c | 2 ++
7 files changed, 8 insertions(+), 6 deletions(-)
diff --git a/drivers/media/platform/davinci/vpbe_display.c
b/drivers/media/platform/davinci/vpbe_display.c
index eac472b..53be7fc 100644
--- a/drivers/media/platform/davinci/vpbe_display.c
+++ b/drivers/media/platform/davinci/vpbe_display.c
@@ -347,7 +347,7 @@ static int vpbe_start_streaming(struct vb2_queue *vq,
unsigned int count)
/* If buffer queue is empty, return error */
if (list_empty(&layer->dma_queue)) {
v4l2_err(&vpbe_dev->v4l2_dev, "buffer queue is empty\n");
- return -EINVAL;
+ return -ENODATA;
}
/* Get the next frame from the buffer queue */
layer->next_frm = layer->cur_frm = list_entry(layer->dma_queue.next,
diff --git a/drivers/media/platform/davinci/vpif_capture.c
b/drivers/media/platform/davinci/vpif_capture.c
index 52ac5e6..4b04a27 100644
--- a/drivers/media/platform/davinci/vpif_capture.c
+++ b/drivers/media/platform/davinci/vpif_capture.c
@@ -277,7 +277,7 @@ static int vpif_start_streaming(struct vb2_queue *vq,
unsigned int count)
if (list_empty(&common->dma_queue)) {
spin_unlock_irqrestore(&common->irqlock, flags);
vpif_dbg(1, debug, "buffer queue is empty\n");
- return -EIO;
+ return -ENODATA;
}
/* Get the next frame from the buffer queue */
diff --git a/drivers/media/platform/davinci/vpif_display.c
b/drivers/media/platform/davinci/vpif_display.c
index c31bcf1..c5070dc 100644
--- a/drivers/media/platform/davinci/vpif_display.c
+++ b/drivers/media/platform/davinci/vpif_display.c
@@ -239,7 +239,7 @@ static int vpif_start_streaming(struct vb2_queue *vq,
unsigned int count)
if (list_empty(&common->dma_queue)) {
spin_unlock_irqrestore(&common->irqlock, flags);
vpif_err("buffer queue is empty\n");
- return -EIO;
+ return -ENODATA;
}
/* Get the next frame from the buffer queue */
diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc_enc.c
b/drivers/media/platform/s5p-mfc/s5p_mfc_enc.c
index 4ff3b6c..3bdfe85 100644
--- a/drivers/media/platform/s5p-mfc/s5p_mfc_enc.c
+++ b/drivers/media/platform/s5p-mfc/s5p_mfc_enc.c
@@ -1863,7 +1863,7 @@ static int s5p_mfc_start_streaming(struct vb2_queue *q,
unsigned int count)
if (ctx->src_bufs_cnt < ctx->pb_count) {
mfc_err("Need minimum %d OUTPUT buffers\n",
ctx->pb_count);
- return -EINVAL;
+ return -ENODATA;
}
}
diff --git a/drivers/media/platform/s5p-tv/mixer_video.c
b/drivers/media/platform/s5p-tv/mixer_video.c
index 81b97db..220ec31 100644
--- a/drivers/media/platform/s5p-tv/mixer_video.c
+++ b/drivers/media/platform/s5p-tv/mixer_video.c
@@ -948,7 +948,7 @@ static int start_streaming(struct vb2_queue *vq, unsigned
int count)
if (count == 0) {
mxr_dbg(mdev, "no output buffers queued\n");
- return -EINVAL;
+ return -ENODATA;
}
/* block any changes in output configuration */
diff --git a/drivers/media/platform/soc_camera/mx2_camera.c
b/drivers/media/platform/soc_camera/mx2_camera.c
index 45a0276..587e3d1 100644
--- a/drivers/media/platform/soc_camera/mx2_camera.c
+++ b/drivers/media/platform/soc_camera/mx2_camera.c
@@ -659,7 +659,7 @@ static int mx2_start_streaming(struct vb2_queue *q,
unsigned int count)
unsigned long flags;
if (count < 2)
- return -EINVAL;
+ return -ENODATA;
spin_lock_irqsave(&pcdev->lock, flags);
diff --git a/drivers/staging/media/davinci_vpfe/vpfe_video.c
b/drivers/staging/media/davinci_vpfe/vpfe_video.c
index 24d98a6..a81b0ab 100644
--- a/drivers/staging/media/davinci_vpfe/vpfe_video.c
+++ b/drivers/staging/media/davinci_vpfe/vpfe_video.c
@@ -1201,6 +1201,8 @@ static int vpfe_start_streaming(struct vb2_queue *vq,
unsigned int count)
unsigned long addr;
int ret;
+ if (count == 0)
+ return -ENODATA;
ret = mutex_lock_interruptible(&video->lock);
if (ret)
goto streamoff;
--
1.8.4.3
--
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