Commit 7238b42e authored by Mikita Lipski's avatar Mikita Lipski Committed by Alex Deucher
Browse files

drm/amd/display: PSR panel capability debugfs 



[why]
Adding a debugfs to show PSR capability of the panel and the driver.
To use:
  cat /sys/kernel/debug/dri/0/eDP-X/psr_capability
Expected output:
 Sink support: no/yes
 Driver support: no/yes

[how]
Adding psr_capability to eDP connectors.

Reviewed-by: default avatarNicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Acked-by: default avatarBhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: default avatarMikita Lipski <mikita.lipski@amd.com>
Tested-by: default avatarDaniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent b9957475

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c

+44 −0
Original line number Diff line number Diff line
@@ -824,6 +824,48 @@ static int dmub_fw_state_show(struct seq_file *m, void *data) 
	return seq_write(m, state_base, state_size);

}



/* psr_capability_show() - show eDP panel PSR capability

 *

 * The read function: sink_psr_capability_show

 * Shows if sink has PSR capability or not.

 * If yes - the PSR version is appended

 *

 *	cat /sys/kernel/debug/dri/0/eDP-X/psr_capability

 *

 * Expected output:

 * "Sink support: no\n" - if panel doesn't support PSR

 * "Sink support: yes [0x01]\n" - if panel supports PSR1

 * "Driver support: no\n" - if driver doesn't support PSR

 * "Driver support: yes [0x01]\n" - if driver supports PSR1

 */

static int psr_capability_show(struct seq_file *m, void *data)

{

	struct drm_connector *connector = m->private;

	struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);

	struct dc_link *link = aconnector->dc_link;



	if (!link)

		return -ENODEV;



	if (link->type == dc_connection_none)

		return -ENODEV;



	if (!(link->connector_signal & SIGNAL_TYPE_EDP))

		return -ENODEV;



	seq_printf(m, "Sink support: %s", yesno(link->dpcd_caps.psr_caps.psr_version != 0));

	if (link->dpcd_caps.psr_caps.psr_version)

		seq_printf(m, " [0x%02x]", link->dpcd_caps.psr_caps.psr_version);

	seq_puts(m, "\n");



	seq_printf(m, "Driver support: %s", yesno(link->psr_settings.psr_feature_enabled));

	if (link->psr_settings.psr_version)

		seq_printf(m, " [0x%02x]", link->psr_settings.psr_version);

	seq_puts(m, "\n");



	return 0;

}



/*

 * Returns the current and maximum output bpc for the connector.

 * Example usage: cat /sys/kernel/debug/dri/0/DP-1/output_bpc
@@ -2467,6 +2509,7 @@ DEFINE_SHOW_ATTRIBUTE(dp_lttpr_status); 
DEFINE_SHOW_ATTRIBUTE(hdcp_sink_capability);

#endif

DEFINE_SHOW_ATTRIBUTE(internal_display);

DEFINE_SHOW_ATTRIBUTE(psr_capability);



static const struct file_operations dp_dsc_clock_en_debugfs_fops = {

	.owner = THIS_MODULE,
@@ -2726,6 +2769,7 @@ void connector_debugfs_init(struct amdgpu_dm_connector *connector) 
		}

	}

	if (connector->base.connector_type == DRM_MODE_CONNECTOR_eDP) {

		debugfs_create_file_unsafe("psr_capability", 0444, dir, connector, &psr_capability_fops);

		debugfs_create_file_unsafe("psr_state", 0444, dir, connector, &psr_fops);

		debugfs_create_file("amdgpu_current_backlight_pwm", 0444, dir, connector,

				    &current_backlight_fops);