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

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[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: Shirish S <shirish.s@amd.com>
Signed-off-by: Hamza Mahfooz <hamza.mahfooz@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Shirish S 2023-03-10 11:54:17 +05:30 committed by Alex Deucher
parent dcaf5000b0
commit 22f1482aff
1 changed files with 20 additions and 0 deletions
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20
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
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@ -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,