media: coda: coda_buffer_meta housekeeping fix

It's possible that the VPU was initialized using just one buffer,
containing only codec headers.

In this case, right after the initialization and after updating
the FIFO read pointer, we need to iterate through all the coda_buffer_meta
and release any metas that have been already used by the VPU.

This issue is affecting indirectly the bitstream buffer fill
threshold, which depends on the meta end position of the first
queued meta, which is passed to coda_bitstream_can_fetch_past().

Without this fix, it's possible that for certain videos, the
bitstream buffer level is not filled properly, resulting in a PIC_RUN
timeout.

Reported-by: Benjamin Bara <benjamin.bara@skidata.com>
Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/media/platform/coda/coda.h b/drivers/media/platform/coda/coda.h
index b81f3aca9209..e53f7a65d532 100644
--- a/drivers/media/platform/coda/coda.h
+++ b/drivers/media/platform/coda/coda.h
@@ -259,6 +259,7 @@ struct coda_ctx {
 	struct list_head		buffer_meta_list;
 	spinlock_t			buffer_meta_lock;
 	int				num_metas;
+	unsigned int			first_frame_sequence;
 	struct coda_aux_buf		workbuf;
 	int				num_internal_frames;
 	int				idx;