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drm/amd/display: PSR panel capability debugfs

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[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: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Mikita Lipski <mikita.lipski@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Mikita Lipski 2021-11-18 08:34:41 -05:00 committed by Alex Deucher
parent b995747511
commit 7238b42e1f
1 changed files with 44 additions and 0 deletions
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44
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
View File

@ -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);