Commit 22f1482a authored by Shirish S's avatar Shirish S Committed by Alex Deucher
Browse files

drm/amd/display: add sysfs entry to read PSR residency from firmware 



[Why]
Currently there aren't any methods to determine PSR state residency.

[How]
create a sysfs entry for reading residency and internally hook it up
to existing functionality of reading PSR residency from firmware.

[Hamza: dropped the link.h include and made checkpatch happy]

Signed-off-by: default avatarShirish S <shirish.s@amd.com>
Signed-off-by: default avatarHamza Mahfooz <hamza.mahfooz@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent dcaf5000

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

+20 −0
Original line number Diff line number Diff line
@@ -2793,6 +2793,22 @@ static int psr_get(void *data, u64 *val) 
	return 0;

}



/*

 *  Read PSR state residency

 */

static int psr_read_residency(void *data, u64 *val)

{

	struct amdgpu_dm_connector *connector = data;

	struct dc_link *link = connector->dc_link;

	u32 residency;



	link_get_psr_residency(link, &residency);



	*val = (u64)residency;



	return 0;

}



/*

 * Set dmcub trace event IRQ enable or disable.

 * Usage to enable dmcub trace event IRQ: echo 1 > /sys/kernel/debug/dri/0/amdgpu_dm_dmcub_trace_event_en
@@ -2828,6 +2844,8 @@ DEFINE_DEBUGFS_ATTRIBUTE(dmcub_trace_event_state_fops, dmcub_trace_event_state_g 
			 dmcub_trace_event_state_set, "%llu\n");



DEFINE_DEBUGFS_ATTRIBUTE(psr_fops, psr_get, NULL, "%llu\n");

DEFINE_DEBUGFS_ATTRIBUTE(psr_residency_fops, psr_read_residency, NULL,

			 "%llu\n");



DEFINE_SHOW_ATTRIBUTE(current_backlight);

DEFINE_SHOW_ATTRIBUTE(target_backlight);
@@ -2991,6 +3009,8 @@ 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_unsafe("psr_residency", 0444, dir,

					   connector, &psr_residency_fops);

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

				    &current_backlight_fops);

		debugfs_create_file("amdgpu_target_backlight_pwm", 0444, dir, connector,