linux-kernel - [PATCH v5 0/5] media: imx-jpeg: Fix some motion-jpeg decoding

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Message-ID: <20250418070826.141-1-ming.qian@oss.nxp.com>
Date: Fri, 18 Apr 2025 15:08:16 +0800
From: ming.qian@....nxp.com
To: mchehab@...nel.org,
	hverkuil-cisco@...all.nl,
	mirela.rabulea@....nxp.com
Cc: shawnguo@...nel.org,
	s.hauer@...gutronix.de,
	kernel@...gutronix.de,
	festevam@...il.com,
	xiahong.bao@....com,
	eagle.zhou@....com,
	linux-imx@....com,
	imx@...ts.linux.dev,
	linux-media@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org
Subject: [PATCH v5 0/5] media: imx-jpeg: Fix some motion-jpeg decoding

From: Ming Qian <ming.qian@....nxp.com>

To support decoding motion-jpeg without DHT, driver will try to decode a
pattern jpeg before actual jpeg frame by use of linked descriptors
(This is called "repeat mode"), then the DHT in the pattern jpeg can be
used for decoding the motion-jpeg.

But there is some hardware limitation in the repeat mode, that may cause
corruption or decoding timeout.

Try to make workaround for these limitation in this patchset.

Ming Qian (5):
  media: imx-jpeg: Move mxc_jpeg_free_slot_data() ahead
  media: imx-jpeg: Reset slot data pointers when free data
  media: imx-jpeg: Cleanup after an allocation error
  media: imx-jpeg: Change the pattern size to 128x64
  media: imx-jpeg: Check decoding is ongoing for motion-jpeg

 .../media/platform/nxp/imx-jpeg/mxc-jpeg-hw.h |   1 +
 .../media/platform/nxp/imx-jpeg/mxc-jpeg.c    | 120 +++++++++++++-----
 .../media/platform/nxp/imx-jpeg/mxc-jpeg.h    |   5 +
 3 files changed, 97 insertions(+), 29 deletions(-)

-- 
2.43.0-rc1