drivers: media: pisp_be: Update seqeuence numbers of the buffers

Add a framebuffer sequence counter and increment on every completed job.
This counter is then used to update the VB2 buffer sequence count before
calling vb2_buffer_done().

Signed-off-by: Naushir Patuck <naush@raspberrypi.com>

diff --git a/drivers/media/platform/raspberrypi/pisp_be/pisp_be.c b/drivers/media/platform/raspberrypi/pisp_be/pisp_be.c
index 166ec21..073b0e3 100644 (file)
--- a/drivers/media/platform/raspberrypi/pisp_be/pisp_be.c
+++ b/drivers/media/platform/raspberrypi/pisp_be/pisp_be.c
@@ -203,6 +203,7 @@ struct pispbe_node_group {
        struct media_pad pad[PISPBE_NUM_NODES]; /* output pads first */
        struct pisp_be_tiles_config *config;
        dma_addr_t config_dma_addr;
+       unsigned int sequence;
 };
 
 /* Records details of the jobs currently running or queued on the h/w. */
@@ -703,10 +704,13 @@ static void pispbe_isr_jobdone(struct pispbe_dev *pispbe,
        for (i = 0; i < PISPBE_NUM_NODES; i++) {
                if (buf[i]) {
                        buf[i]->vb.vb2_buf.timestamp = ts;
+                       buf[i]->vb.sequence = job->node_group->sequence;
                        vb2_buffer_done(&buf[i]->vb.vb2_buf,
                                        VB2_BUF_STATE_DONE);
                }
        }
+
+       job->node_group->sequence++;
 }
 
 static irqreturn_t pispbe_isr(int irq, void *dev)
@@ -962,6 +966,7 @@ static int pispbe_node_start_streaming(struct vb2_queue *q, unsigned int count)
 
        spin_lock_irqsave(&pispbe->hw_lock, flags);
        node->node_group->streaming_map |=  BIT(node->id);
+       node->node_group->sequence = 0;
        spin_unlock_irqrestore(&pispbe->hw_lock, flags);
 
        dev_dbg(pispbe->dev, "%s: for node %s (count %u)\n",