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drm/i915: Add i915_lpsp_capability debugfs

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New i915_pm_lpsp igt solution approach relies on connector specific
debugfs attribute i915_lpsp_capability, it exposes whether an output is
capable of driving lpsp.

v2:
- CI fixup.
v3:
- register i915_lpsp_info only for supported connector. [Jani]
- use intel_display_power_well_is_enabled() instead of looking
  inside power_well count. [Jani]
- fixes the lpsp capable conditional logic. [Jani]
- combined the lpsp capable and enable info. [Jani]
v4:
- Separate out connector based debugfs i915_lpsp_capability
  lpsp enable status would be exposes by different entry. [Animesh]
v5:
- Add Platform Gen condition to add i915_lpsp_capability
  and some cosmetic nitpick changes. [Animesh]

Reviewed-by: Animesh Manna <animesh.manna@intel.com>
Signed-off-by: Anshuman Gupta <anshuman.gupta@intel.com>
Signed-off-by: Uma Shankar <uma.shankar@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200415170555.15531-3-anshuman.gupta@intel.com
This commit is contained in:
Anshuman Gupta 2020-04-15 22:35:53 +05:30 committed by Uma Shankar
parent fc4a8c16e3
commit 8806211fe7
1 changed files with 53 additions and 0 deletions
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53
drivers/gpu/drm/i915/display/intel_display_debugfs.c
View File

@ -1997,6 +1997,48 @@ static int i915_hdcp_sink_capability_show(struct seq_file *m, void *data)
}
DEFINE_SHOW_ATTRIBUTE(i915_hdcp_sink_capability);
#define LPSP_CAPABLE(COND) (COND ? seq_puts(m, "LPSP: capable\n") : \
seq_puts(m, "LPSP: incapable\n"))
static int i915_lpsp_capability_show(struct seq_file *m, void *data)
{
struct drm_connector *connector = m->private;
struct intel_encoder *encoder =
intel_attached_encoder(to_intel_connector(connector));
struct drm_i915_private *i915 = to_i915(connector->dev);
if (connector->status != connector_status_connected)
return -ENODEV;
switch (INTEL_GEN(i915)) {
case 12:
/*
* Actually TGL can drive LPSP on port till DDI_C
* but there is no physical connected DDI_C on TGL sku's,
* even driver is not initilizing DDI_C port for gen12.
*/
LPSP_CAPABLE(encoder->port <= PORT_B);
break;
case 11:
LPSP_CAPABLE(connector->connector_type == DRM_MODE_CONNECTOR_DSI ||
connector->connector_type == DRM_MODE_CONNECTOR_eDP);
break;
case 10:
case 9:
LPSP_CAPABLE(encoder->port == PORT_A &&
(connector->connector_type == DRM_MODE_CONNECTOR_DSI ||
connector->connector_type == DRM_MODE_CONNECTOR_eDP ||
connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort));
break;
default:
if (IS_HASWELL(i915) || IS_BROADWELL(i915))
LPSP_CAPABLE(connector->connector_type == DRM_MODE_CONNECTOR_eDP);
}
return 0;
}
DEFINE_SHOW_ATTRIBUTE(i915_lpsp_capability);
static int i915_dsc_fec_support_show(struct seq_file *m, void *data)
{
struct drm_connector *connector = m->private;
@ -2140,5 +2182,16 @@ int intel_connector_debugfs_add(struct drm_connector *connector)
debugfs_create_file("i915_dsc_fec_support", S_IRUGO, root,
connector, &i915_dsc_fec_support_fops);
/* Legacy panels doesn't lpsp on any platform */
if ((INTEL_GEN(dev_priv) >= 9 || IS_HASWELL(dev_priv) ||
IS_BROADWELL(dev_priv)) &&
(connector->connector_type == DRM_MODE_CONNECTOR_DSI ||
connector->connector_type == DRM_MODE_CONNECTOR_eDP ||
connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort ||
connector->connector_type == DRM_MODE_CONNECTOR_HDMIA ||
connector->connector_type == DRM_MODE_CONNECTOR_HDMIB))
debugfs_create_file("i915_lpsp_capability", 0444, root,
connector, &i915_lpsp_capability_fops);
return 0;
}