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Subject: media: visl: use canonical ftrace path
Author: Ross Zwisler <zwis...@google.com>
Date: Tue Aug 29 14:46:01 2023 -0600
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 <zwis...@google.com>
Reviewed-by: Masami Hiramatsu (Google) <mhira...@kernel.org>
Reviewed-by: Steven Rostedt (Google) <rost...@goodmis.org>
Signed-off-by: Hans Verkuil <hverkuil-ci...@xs4all.nl>
Documentation/admin-guide/media/visl.rst | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/Documentation/admin-guide/media/visl.rst
b/Documentation/admin-guide/media/visl.rst
index 7d2dc78341c9..4328c6c72d30 100644
--- a/Documentation/admin-guide/media/visl.rst
+++ b/Documentation/admin-guide/media/visl.rst
@@ -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
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