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Subject[PATCH AUTOSEL 4.14 059/167] media: coda: clear error return value before picture run
Date
From: Philipp Zabel <p.zabel@pengutronix.de>

[ 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
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