Commit 727962f0 authored by Nicholas Kazlauskas's avatar Nicholas Kazlauskas Committed by Alex Deucher

drm/amd/display: Expose connector VRR range via debugfs

[Why]
It's useful to know the min and max vrr range for IGT testing.

[How]
Expose the min and max vfreq for the connector via a debugfs file
on the connector, "vrr_range".

Example usage: cat /sys/kernel/debug/dri/0/DP-1/vrr_range
Signed-off-by: default avatarNicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Reviewed-by: default avatarHarry Wentland <harry.wentland@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 82abf337
......@@ -671,6 +671,25 @@ static ssize_t dp_phy_test_pattern_debugfs_write(struct file *f, const char __us
return bytes_from_user;
}
/*
* Returns the min and max vrr vfreq through the connector's debugfs file.
* Example usage: cat /sys/kernel/debug/dri/0/DP-1/vrr_range
*/
static int vrr_range_show(struct seq_file *m, void *data)
{
struct drm_connector *connector = m->private;
struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
if (connector->status != connector_status_connected)
return -ENODEV;
seq_printf(m, "Min: %u\n", (unsigned int)aconnector->min_vfreq);
seq_printf(m, "Max: %u\n", (unsigned int)aconnector->max_vfreq);
return 0;
}
DEFINE_SHOW_ATTRIBUTE(vrr_range);
static const struct file_operations dp_link_settings_debugfs_fops = {
.owner = THIS_MODULE,
.read = dp_link_settings_read,
......@@ -697,7 +716,8 @@ static const struct {
} dp_debugfs_entries[] = {
{"link_settings", &dp_link_settings_debugfs_fops},
{"phy_settings", &dp_phy_settings_debugfs_fop},
{"test_pattern", &dp_phy_test_pattern_fops}
{"test_pattern", &dp_phy_test_pattern_fops},
{"vrr_range", &vrr_range_fops}
};
int connector_debugfs_init(struct amdgpu_dm_connector *connector)
......
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