linux-kernel - [PATCH] media: docs: dev-decoder: Trigger dynamic source change for colorspace

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Message-ID: <20250107053622.1287461-1-ming.qian@oss.nxp.com>
Date: Tue,  7 Jan 2025 14:36:22 +0900
From: Ming Qian <ming.qian@....nxp.com>
To: mchehab@...nel.org,
	hverkuil-cisco@...all.nl
Cc: nicolas@...fresne.ca,
	shawnguo@...nel.org,
	robh+dt@...nel.org,
	s.hauer@...gutronix.de,
	kernel@...gutronix.de,
	festevam@...il.com,
	linux-imx@....com,
	xiahong.bao@....com,
	eagle.zhou@....com,
	tao.jiang_2@....com,
	ming.qian@....nxp.com,
	imx@...ts.linux.dev,
	linux-media@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org
Subject: [PATCH] media: docs: dev-decoder: Trigger dynamic source change for colorspace

If colorspace changes, the client needs to renegotiate the pipeline,
otherwise the decoded frame may not be displayed correctly.

If it can trigger an source change event, then client can switch to the
correct stream setting. And each frame can be displayed properly.

So add colorspace as a trigger parameter for dynamic resolution change.

Signed-off-by: Ming Qian <ming.qian@....nxp.com>
---
 Documentation/userspace-api/media/v4l/dev-decoder.rst | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Documentation/userspace-api/media/v4l/dev-decoder.rst b/Documentation/userspace-api/media/v4l/dev-decoder.rst
index ef8e8cf31f90..49566569ad26 100644
--- a/Documentation/userspace-api/media/v4l/dev-decoder.rst
+++ b/Documentation/userspace-api/media/v4l/dev-decoder.rst
@@ -932,7 +932,9 @@ reflected by corresponding queries):
 
 * the minimum number of buffers needed for decoding,
 
-* bit-depth of the bitstream has been changed.
+* bit-depth of the bitstream has been changed,
+
+* colorspace of the bitstream has been changed.
 
 Whenever that happens, the decoder must proceed as follows:
 
-- 
2.43.0-rc1