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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: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Nicholas Kazlauskas 2019-01-24 12:06:00 -05:00 committed by Alex Deucher
parent 82abf33766
commit 727962f030
1 changed files with 21 additions and 1 deletions
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22
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
View File

@ -671,6 +671,25 @@ static ssize_t dp_phy_test_pattern_debugfs_write(struct file *f, const char __us
return bytes_from_user; 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 = { static const struct file_operations dp_link_settings_debugfs_fops = {
.owner = THIS_MODULE, .owner = THIS_MODULE,
.read = dp_link_settings_read, .read = dp_link_settings_read,
@ -697,7 +716,8 @@ static const struct {
} dp_debugfs_entries[] = { } dp_debugfs_entries[] = {
{"link_settings", &dp_link_settings_debugfs_fops}, {"link_settings", &dp_link_settings_debugfs_fops},
{"phy_settings", &dp_phy_settings_debugfs_fop}, {"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) int connector_debugfs_init(struct amdgpu_dm_connector *connector)