[PATCH] visl: use canonical ftrace path

From: Ross Zwisler
Date: Tue Aug 29 2023 - 16:47:04 EST


From: Ross Zwisler <zwisler@xxxxxxxxxx>

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 <zwisler@xxxxxxxxxx>
---
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
--
2.42.0.rc2.253.gd59a3bf2b4-goog