[Intel-gfx] [RFC 02/12] drm/i915/config: Introduce intel_output_name

[Bob Paauwe]

Human readable name for each output type to correspond with names
used in the ACPI property tables.

Signed-off-by: Bob Paauwe <bob.j.paauwe at intel.com>
---
 drivers/gpu/drm/i915/intel_display.c | 57 ++++++++++++++++++++++++++++++++++++
 drivers/gpu/drm/i915/intel_drv.h     |  1 +
 2 files changed, 58 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 3b0fe9f..de6de83 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -12440,6 +12440,63 @@ static bool intel_crt_present(struct drm_device *dev)
 	return true;
 }
 
+/*
+ * Provide a name for the various outputs.
+ */
+const char *intel_output_name(struct intel_connector *connector)
+{
+	int output;
+	static const char *names[] = {
+		[INTEL_OUTPUT_UNUSED] = "Unused",
+		[INTEL_OUTPUT_ANALOG] = "Analog",
+		[INTEL_OUTPUT_DVO] = "DVO",
+		[INTEL_OUTPUT_SDVO] = "SDVO",
+		[INTEL_OUTPUT_LVDS] = "LVDS",
+		[INTEL_OUTPUT_TVOUT] = "TV",
+		[INTEL_OUTPUT_HDMI] = "HDMI",
+		[INTEL_OUTPUT_DISPLAYPORT] = "DisplayPort",
+		[INTEL_OUTPUT_EDP] = "eDP",
+		[INTEL_OUTPUT_DSI] = "DSI",
+		[INTEL_OUTPUT_UNKNOWN] = "Unknown",
+	};
+	static const char *name_ex[] = {
+		[0] = "HDMI_A",
+		[1] = "HDMI_B",
+		[2] = "HDMI_C",
+		[3] = "HDMI_D",
+		[4] = "DisplayPort_A",
+		[5] = "DisplayPort_B",
+		[6] = "DisplayPort_C",
+		[7] = "DisplayPort_D",
+		[8] = "eDP_A",
+		[9] = "eDP_B",
+		[10] = "eDP_C",
+		[11] = "eDP_D",
+	};
+
+	if (!connector || !connector->encoder)
+		return "Unknown";
+
+	switch (connector->encoder->type) {
+	case INTEL_OUTPUT_HDMI:
+	case INTEL_OUTPUT_DISPLAYPORT:
+	case INTEL_OUTPUT_EDP:
+		output = ((connector->encoder->type - INTEL_OUTPUT_HDMI) * 4) +
+			enc_to_dig_port(&connector->encoder->base)->port;
+
+		if (output < 0 || output >= ARRAY_SIZE(name_ex))
+			return "Invalid";
+
+		return name_ex[output];
+	default:
+		if (output < 0 || output >= ARRAY_SIZE(names) || !names[output])
+			return "Invalid";
+
+		return names[output];
+	}
+}
+
+
 static void intel_setup_outputs(struct drm_device *dev)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index aefd95e..4c81ee9 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -893,6 +893,7 @@ void i915_audio_component_cleanup(struct drm_i915_private *dev_priv);
 
 /* intel_display.c */
 extern const struct drm_plane_funcs intel_plane_funcs;
+const char *intel_output_name(struct intel_connector *intel_connector);
 bool intel_has_pending_fb_unpin(struct drm_device *dev);
 int intel_pch_rawclk(struct drm_device *dev);
 void intel_mark_busy(struct drm_device *dev);
-- 
2.1.0