| From 461e77a9d1168bebe21077237231cefff9c00148 Mon Sep 17 00:00:00 2001 |
| From: Philipp Zabel <p.zabel@pengutronix.de> |
| Date: Mon, 8 Apr 2019 08:32:49 -0400 |
| Subject: media: coda: clear error return value before picture run |
| |
| [ Upstream commit bbeefa7357a648afe70e7183914c87c3878d528d ] |
| |
| The error return value is not written by some firmware codecs, such as |
| MPEG-2 decode on CodaHx4. Clear the error return value before starting |
| the picture run to avoid misinterpreting unrelated values returned by |
| sequence initialization as error return value. |
| |
| Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de> |
| Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> |
| Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org> |
| Signed-off-by: Sasha Levin <sashal@kernel.org> |
| --- |
| drivers/media/platform/coda/coda-bit.c | 3 +++ |
| 1 file changed, 3 insertions(+) |
| |
| diff --git a/drivers/media/platform/coda/coda-bit.c b/drivers/media/platform/coda/coda-bit.c |
| index 3457a5f1c8a8e..6eee55430d46a 100644 |
| --- a/drivers/media/platform/coda/coda-bit.c |
| +++ b/drivers/media/platform/coda/coda-bit.c |
| @@ -1948,6 +1948,9 @@ static int coda_prepare_decode(struct coda_ctx *ctx) |
| /* Clear decode success flag */ |
| coda_write(dev, 0, CODA_RET_DEC_PIC_SUCCESS); |
| |
| + /* Clear error return value */ |
| + coda_write(dev, 0, CODA_RET_DEC_PIC_ERR_MB); |
| + |
| trace_coda_dec_pic_run(ctx, meta); |
| |
| coda_command_async(ctx, CODA_COMMAND_PIC_RUN); |
| -- |
| 2.20.1 |
| |
