Commit 85b901e6 authored by Ross Zwisler's avatar Ross Zwisler Committed by Hans Verkuil
Browse files

media: visl: use canonical ftrace path 



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: default avatarRoss Zwisler <zwisler@google.com>
Reviewed-by: default avatarMasami Hiramatsu (Google) <mhiramat@kernel.org>
Reviewed-by: default avatarSteven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: default avatarHans Verkuil <hverkuil-cisco@xs4all.nl>
parent 1fd6eb12

Documentation/admin-guide/media/visl.rst

+3 −3
Original line number Diff line number Diff line
@@ -78,7 +78,7 @@ The trace events are defined on a per-codec basis, e.g.: 


.. code-block:: bash



        $ ls /sys/kernel/debug/tracing/events/ | grep visl

        $ ls /sys/kernel/tracing/events/ | grep visl

        visl_fwht_controls

        visl_h264_controls

        visl_hevc_controls
@@ -90,13 +90,13 @@ For example, in order to dump HEVC SPS data: 


.. code-block:: bash



        $ echo 1 >  /sys/kernel/debug/tracing/events/visl_hevc_controls/v4l2_ctrl_hevc_sps/enable

        $ echo 1 >  /sys/kernel/tracing/events/visl_hevc_controls/v4l2_ctrl_hevc_sps/enable



The SPS data will be dumped to the trace buffer, i.e.:



.. code-block:: bash



        $ cat /sys/kernel/debug/tracing/trace

        $ cat /sys/kernel/tracing/trace

        video_parameter_set_id 0

        seq_parameter_set_id 0

        pic_width_in_luma_samples 1920