Add a 1 second timeout for each PIC_RUN command to the CODA. In
case it locks up, stop all queues and dequeue remaining buffers.
Signed-off-by: Philipp Zabel <p.zabel@xxxxxxxxxxxxxx>
---
Changes since v3:
- Add struct coda_dev *dev pointer in coda_start_streaming.
- Call cancel_delayed_work in coda_stop_streaming and in coda_irq_handler.
- Lock the device mutex in coda_timeout to avoid a race with coda_release.
---
drivers/media/platform/coda.c | 26 ++++++++++++++++++++++++++
1 file changed, 26 insertions(+)
diff --git a/drivers/media/platform/coda.c b/drivers/media/platform/coda.c
index 159df08..7f6ec3a 100644
--- a/drivers/media/platform/coda.c
+++ b/drivers/media/platform/coda.c
@@ -136,6 +136,7 @@ struct coda_dev {
struct vb2_alloc_ctx *alloc_ctx;
struct list_head instances;
unsigned long instance_mask;
+ struct delayed_work timeout;
};
struct coda_params {
@@ -722,6 +723,9 @@ static void coda_device_run(void *m2m_priv)
CODA7_REG_BIT_AXI_SRAM_USE);
}
+ /* 1 second timeout in case CODA locks up */
+ schedule_delayed_work(&dev->timeout, HZ);
+
coda_command_async(ctx, CODA_COMMAND_PIC_RUN);
}
@@ -1208,6 +1212,7 @@ static int coda_start_streaming(struct vb2_queue *q, unsigned int count)
static int coda_stop_streaming(struct vb2_queue *q)
{
struct coda_ctx *ctx = vb2_get_drv_priv(q);
+ struct coda_dev *dev = ctx->dev;
if (q->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
v4l2_dbg(1, coda_debug, &ctx->dev->v4l2_dev,
@@ -1220,6 +1225,8 @@ static int coda_stop_streaming(struct vb2_queue *q)
}
if (!ctx->rawstreamon && !ctx->compstreamon) {
+ cancel_delayed_work(&dev->timeout);
+
v4l2_dbg(1, coda_debug, &ctx->dev->v4l2_dev,
"%s: sent command 'SEQ_END' to coda\n", __func__);
if (coda_command_sync(ctx, CODA_COMMAND_SEQ_END)) {
@@ -1492,6 +1499,8 @@ static irqreturn_t coda_irq_handler(int irq, void *data)
u32 wr_ptr, start_ptr;
struct coda_ctx *ctx;
+ __cancel_delayed_work(&dev->timeout);
+
/* read status register to attend the IRQ */
coda_read(dev, CODA_REG_BIT_INT_STATUS);
coda_write(dev, CODA_REG_BIT_INT_CLEAR_SET,
@@ -1564,6 +1573,22 @@ static irqreturn_t coda_irq_handler(int irq, void *data)
return IRQ_HANDLED;
}
+static void coda_timeout(struct work_struct *work)
+{
+ struct coda_ctx *ctx;
+ struct coda_dev *dev = container_of(to_delayed_work(work),
+ struct coda_dev, timeout);
+
+ v4l2_err(&dev->v4l2_dev, "CODA PIC_RUN timeout, stopping all streams\n");
+
+ mutex_lock(&dev->dev_mutex);
+ list_for_each_entry(ctx, &dev->instances, list) {
+ v4l2_m2m_streamoff(NULL, ctx->m2m_ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);
+ v4l2_m2m_streamoff(NULL, ctx->m2m_ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE);
+ }
+ mutex_unlock(&dev->dev_mutex);
+}
+
static u32 coda_supported_firmwares[] = {
CODA_FIRMWARE_VERNUM(CODA_DX6, 2, 2, 5),
CODA_FIRMWARE_VERNUM(CODA_7541, 13, 4, 29),
@@ -1835,6 +1860,7 @@ static int __devinit coda_probe(struct platform_device *pdev)
spin_lock_init(&dev->irqlock);
INIT_LIST_HEAD(&dev->instances);
+ INIT_DELAYED_WORK(&dev->timeout, coda_timeout);
dev->plat_dev = pdev;
dev->clk_per = devm_clk_get(&pdev->dev, "per");
--
1.7.10.4
--
To unsubscribe from this list: send the line "unsubscribe linux-media" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
