From: Ming Qian <ming.qian@nxp.com>
To: mchehab@kernel.org, mirela.rabulea@oss.nxp.com, hverkuil-cisco@xs4all.nl
Cc: shawnguo@kernel.org, s.hauer@pengutronix.de,
kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com,
linux-media@vger.kernel.org, linux-kernel@vger.kernel.org,
devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Subject: [PATCH] media: imx-jpeg: Leave a blank space before the configuration data
Date: Fri, 27 May 2022 15:54:35 +0800 [thread overview]
Message-ID: <20220527075437.16882-3-ming.qian@nxp.com> (raw)
In-Reply-To: <20220527075437.16882-1-ming.qian@nxp.com>
There is a hardware bug that it will load
the first 128 bytes of configuration data twice,
it will led to some configure error.
so shift the configuration data 128 bytes,
and make the first 128 bytes all zero,
then hardware will load the 128 zero twice,
and ignore them as garbage.
then the configuration data can be loaded correctly
Signed-off-by: Ming Qian <ming.qian@nxp.com>
Reviewed-by: Mirela Rabulea <mirela.rabulea@nxp.com>
---
drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.c b/drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.c
index 734e1b65fbc7..ad4213e020f3 100644
--- a/drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.c
+++ b/drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.c
@@ -519,6 +519,7 @@ static bool mxc_jpeg_alloc_slot_data(struct mxc_jpeg_dev *jpeg,
GFP_ATOMIC);
if (!cfg_stm)
goto err;
+ memset(cfg_stm, 0, MXC_JPEG_MAX_CFG_STREAM);
jpeg->slot_data[slot].cfg_stream_vaddr = cfg_stm;
skip_alloc:
@@ -755,7 +756,7 @@ static unsigned int mxc_jpeg_setup_cfg_stream(void *cfg_stream_vaddr,
u32 fourcc,
u16 w, u16 h)
{
- unsigned int offset = 0;
+ unsigned int offset = 0x80;
u8 *cfg = (u8 *)cfg_stream_vaddr;
struct mxc_jpeg_sof *sof;
struct mxc_jpeg_sos *sos;
--
2.36.1
next prev parent reply other threads:[~2022-05-27 7:56 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-27 7:54 [PATCH] media: imx-jpeg: Correct some definition according specification Ming Qian
2022-05-27 7:54 ` [PATCH] media: imx-jpeg: Disable some unused interrupt Ming Qian
2022-05-27 7:54 ` Ming Qian [this message]
2022-05-27 9:38 ` [PATCH] media: imx-jpeg: Leave a blank space before the configuration data Tommaso Merciai
2022-05-27 9:52 ` [EXT] " Ming Qian
2022-05-27 10:05 ` Tommaso Merciai
2022-05-27 10:15 ` Ming Qian
2022-05-27 7:54 ` [PATCH] media: imx-jpeg: Align upwards buffer size Ming Qian
2022-05-27 7:54 ` [PATCH] media: imx-jpeg: Implement drain using v4l2-mem2mem helpers Ming Qian
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