On Fri-08-04-2022 08:32 pm, Harry Wentland wrote:
On 2022-04-08 02:53, Bhanuprakash Modem wrote:
It's useful to know the connector's max supported bpc for IGT testing. Expose it via a debugfs file on the connector "output_bpc".
Example: cat /sys/kernel/debug/dri/0/DP-1/output_bpc
Cc: Jani Nikula jani.nikula@linux.intel.com Cc: Ville Syrjälä ville.syrjala@linux.intel.com Cc: Harry Wentland harry.wentland@amd.com Signed-off-by: Bhanuprakash Modem bhanuprakash.modem@intel.com
drivers/gpu/drm/drm_debugfs.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+)
diff --git a/drivers/gpu/drm/drm_debugfs.c b/drivers/gpu/drm/drm_debugfs.c index 7f1b82dbaebb..33e5345c6f3e 100644 --- a/drivers/gpu/drm/drm_debugfs.c +++ b/drivers/gpu/drm/drm_debugfs.c @@ -395,6 +395,23 @@ static int vrr_range_show(struct seq_file *m, void *data) } DEFINE_SHOW_ATTRIBUTE(vrr_range);
+/*
- Returns Connector's max supported bpc through debugfs file.
- Example usage: cat /sys/kernel/debug/dri/0/DP-1/max_bpc
/s/max_bpc/output_bpc
Btw, in amdgpu we have both max_bpc and output_bpc.
I'll float a new rev, Thanks.
- Bhanu
Harry
- */
+static int output_bpc_show(struct seq_file *m, void *data) +{
- struct drm_connector *connector = m->private;
- if (connector->status != connector_status_connected)
return -ENODEV;- seq_printf(m, "Maximum: %u\n", connector->display_info.bpc);
- return 0;
+} +DEFINE_SHOW_ATTRIBUTE(output_bpc);
- static const struct file_operations drm_edid_fops = { .owner = THIS_MODULE, .open = edid_open,
@@ -437,6 +454,10 @@ void drm_debugfs_connector_add(struct drm_connector *connector) debugfs_create_file("vrr_range", S_IRUGO, root, connector, &vrr_range_fops);
- /* max bpc */
- debugfs_create_file("output_bpc", 0444, root, connector,
&output_bpc_fops);- if (connector->funcs->debugfs_init) connector->funcs->debugfs_init(connector, root); }