kernel/Documentation/admin-guide/media/visl.rst, branch linux-rolling-stable

doc: media: visl: Document tpg_verbose parameter

2024-02-16T10:46:33Z

Also document stable frames and what it means for testing tools. Signed-off-by: Detlev Casanova Signed-off-by: Hans Verkuil [hverkuil: add media: prefix to Subject]

doc: media: visl: Add AV1 support

2023-12-07T07:31:14Z

Add AV1 information in visl documentation. Reviewed-by: Daniel Almeida Signed-off-by: Detlev Casanova Signed-off-by: Hans Verkuil

media: visl: use canonical ftrace path

2023-10-07T08:55:45Z

The canonical location for the tracefs filesystem is at /sys/kernel/tracing. But, from Documentation/trace/ftrace.rst: Before 4.1, all ftrace tracing control files were within the debugfs file system, which is typically located at /sys/kernel/debug/tracing. For backward compatibility, when mounting the debugfs file system, the tracefs file system will be automatically mounted at: /sys/kernel/debug/tracing Update the visl decoder driver documentation to use this tracefs path. Signed-off-by: Ross Zwisler Reviewed-by: Masami Hiramatsu (Google) Reviewed-by: Steven Rostedt (Google) Signed-off-by: Hans Verkuil

media: visl: add virtual stateless decoder driver

2022-11-25T07:32:16Z

A virtual stateless device for stateless uAPI development purposes. This tool's objective is to help the development and testing of userspace applications that use the V4L2 stateless API to decode media. A userspace implementation can use visl to run a decoding loop even when no hardware is available or when the kernel uAPI for the codec has not been upstreamed yet. This can reveal bugs at an early stage. This driver can also trace the contents of the V4L2 controls submitted to it. It can also dump the contents of the vb2 buffers through a debugfs interface. This is in many ways similar to the tracing infrastructure available for other popular encode/decode APIs out there and can help develop a userspace application by using another (working) one as a reference. Note that no actual decoding of video frames is performed by visl. The V4L2 test pattern generator is used to write various debug information to the capture buffers instead. Signed-off-by: Daniel Almeida Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab