drm/i915: Add debugfs dumping for bigjoiner, v3.

Dump debugfs and planar links as well, this will make it easier to debug
when things go wrong.

v4:
* Rebase
Changes since v1:
- Report planar slaves as such, now that we have the plane_state switch.
Changes since v2:
- Rebase on top of the new plane format dumping

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Manasi Navare <manasi.d.navare@intel.com>
Reviewed-by: Animesh Manna <animesh.manna@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201117194718.11462-12-manasi.d.navare@intel.com

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

@@ -755,6 +755,17 @@ static void plane_rotation(char *buf, size_t bufsize, unsigned int rotation)
 		 rotation);
 }
 
+static const char *plane_visibility(const struct intel_plane_state *plane_state)
+{
+	if (plane_state->uapi.visible)
+		return "visible";
+
+	if (plane_state->planar_slave)
+		return "planar-slave";
+
+	return "hidden";
+}
+
 static void intel_plane_uapi_info(struct seq_file *m, struct intel_plane *plane)
 {
 	const struct intel_plane_state *plane_state =
@@ -773,13 +784,19 @@ static void intel_plane_uapi_info(struct seq_file *m, struct intel_plane *plane)
 	plane_rotation(rot_str, sizeof(rot_str),
 		       plane_state->uapi.rotation);
 
-	seq_printf(m, "\t\tuapi: [FB:%d] %s,0x%llx,%dx%d, src=" DRM_RECT_FP_FMT ", dst=" DRM_RECT_FMT ", rotation=%s\n",
+	seq_printf(m, "\t\tuapi: [FB:%d] %s,0x%llx,%dx%d, visible=%s, src=" DRM_RECT_FP_FMT ", dst=" DRM_RECT_FMT ", rotation=%s\n",
 		   fb ? fb->base.id : 0, fb ? format_name.str : "n/a",
 		   fb ? fb->modifier : 0,
 		   fb ? fb->width : 0, fb ? fb->height : 0,
+		   plane_visibility(plane_state),
 		   DRM_RECT_FP_ARG(&src),
 		   DRM_RECT_ARG(&dst),
 		   rot_str);
+
+	if (plane_state->planar_linked_plane)
+		seq_printf(m, "\t\tplanar: Linked to [PLANE:%d:%s] as a %s\n",
+			   plane_state->planar_linked_plane->base.base.id, plane_state->planar_linked_plane->base.name,
+			   plane_state->planar_slave ? "slave" : "master");
 }
 
 static void intel_plane_hw_info(struct seq_file *m, struct intel_plane *plane)
@@ -875,6 +892,12 @@ static void intel_crtc_info(struct seq_file *m, struct intel_crtc *crtc)
 		intel_scaler_info(m, crtc);
 	}
 
+	if (crtc_state->bigjoiner)
+		seq_printf(m, "\tLinked to [CRTC:%d:%s] as a %s\n",
+			   crtc_state->bigjoiner_linked_crtc->base.base.id,
+			   crtc_state->bigjoiner_linked_crtc->base.name,
+			   crtc_state->bigjoiner_slave ? "slave" : "master");
+
 	for_each_intel_encoder_mask(&dev_priv->drm, encoder,
 				    crtc_state->uapi.encoder_mask)
 		intel_encoder_info(m, crtc, encoder);