From 3a99c4474112f49a5459933d8758614002ca0ddc Mon Sep 17 00:00:00 2001
From: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Date: Fri, 10 Jun 2022 13:52:11 +0100
Subject: [PATCH] media: rkvdec: Disable H.264 error detection
Git-commit: 3a99c4474112f49a5459933d8758614002ca0ddc
Patch-mainline: v6.0
References: git-fixes
Quite often, the HW get stuck in error condition if a stream error
was detected. As documented, the HW should stop immediately and self
reset. There is likely a problem or a miss-understanding of the self
reset mechanism, as unless we make a long pause, the next command
will then report an error even if there is no error in it.
Disabling error detection fixes the issue, and let the decoder continue
after an error. This patch is safe for backport into older kernels.
Fixes: cd33c830448b ("media: rkvdec: Add the rkvdec driver")
Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Reviewed-by: Brian Norris <briannorris@chromium.org>
Tested-by: Brian Norris <briannorris@chromium.org>
Reviewed-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/staging/media/rkvdec/rkvdec-h264.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/staging/media/rkvdec/rkvdec-h264.c b/drivers/staging/media/rkvdec/rkvdec-h264.c
index 4af5a831bde0..4fc167b42cf0 100644
--- a/drivers/staging/media/rkvdec/rkvdec-h264.c
+++ b/drivers/staging/media/rkvdec/rkvdec-h264.c
@@ -1162,8 +1162,8 @@ static int rkvdec_h264_run(struct rkvdec_ctx *ctx)
schedule_delayed_work(&rkvdec->watchdog_work, msecs_to_jiffies(2000));
- writel(0xffffffff, rkvdec->regs + RKVDEC_REG_STRMD_ERR_EN);
- writel(0xffffffff, rkvdec->regs + RKVDEC_REG_H264_ERR_E);
+ writel(0, rkvdec->regs + RKVDEC_REG_STRMD_ERR_EN);
+ writel(0, rkvdec->regs + RKVDEC_REG_H264_ERR_E);
writel(1, rkvdec->regs + RKVDEC_REG_PREF_LUMA_CACHE_COMMAND);
writel(1, rkvdec->regs + RKVDEC_REG_PREF_CHR_CACHE_COMMAND);
--
2.35.3