Commit 8806211f authored by Anshuman Gupta's avatar Anshuman Gupta Committed by Uma Shankar
Browse files

drm/i915: Add i915_lpsp_capability debugfs 



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: default avatarAnimesh Manna <animesh.manna@intel.com>
Signed-off-by: default avatarAnshuman Gupta <anshuman.gupta@intel.com>
Signed-off-by: default avatarUma Shankar <uma.shankar@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200415170555.15531-3-anshuman.gupta@intel.com
parent fc4a8c16

drivers/gpu/drm/i915/display/intel_display_debugfs.c

+53 −0
Original line number Diff line number Diff line
@@ -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;

}

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