drm/i915: Give meaningful names to all the planes

Let's name our planes in a way that makes sense wrt. the spec:
- skl+ -> "plane 1A", "plane 2A", "plane 1C", "cursor A" etc.
- g4x+ -> "primary A", "primary B", "sprite A", "cursor C" etc.
- pre-g4x -> "plane A", "cursor B" etc.

v2: Rebase on top of the fixed/cleaned error paths
    Use a local 'name' variable to make things easier
v3: Pass the name as a function argument to drm_universal_plane_init() (Jani)
v3: Pass the printf style string to drm_universal_plane_init()
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1464371966-15190-6-git-send-email-ville.syrjala@linux.intel.comReviewed-by: Chris Wilson <chris@chris-wilson.co.uk>

drivers/gpu/drm/i915/intel_display.c

@@ -14233,10 +14233,24 @@ static struct drm_plane *intel_primary_plane_create(struct drm_device *dev,
 		primary->disable_plane = i9xx_disable_primary_plane;
 	}
 
+	if (INTEL_INFO(dev)->gen >= 9)
+		ret = drm_universal_plane_init(dev, &primary->base, 0,
+					       &intel_plane_funcs,
+					       intel_primary_formats, num_formats,
+					       DRM_PLANE_TYPE_PRIMARY,
+					       "plane 1%c", pipe_name(pipe));
+	else if (INTEL_INFO(dev)->gen >= 5 || IS_G4X(dev))
+		ret = drm_universal_plane_init(dev, &primary->base, 0,
+					       &intel_plane_funcs,
+					       intel_primary_formats, num_formats,
+					       DRM_PLANE_TYPE_PRIMARY,
+					       "primary %c", pipe_name(pipe));
+	else
 		ret = drm_universal_plane_init(dev, &primary->base, 0,
 					       &intel_plane_funcs,
 					       intel_primary_formats, num_formats,
-				       DRM_PLANE_TYPE_PRIMARY, NULL);
+					       DRM_PLANE_TYPE_PRIMARY,
+					       "plane %c", plane_name(primary->plane));
 	if (ret)
 		goto fail;
 
@@ -14394,7 +14408,8 @@ static struct drm_plane *intel_cursor_plane_create(struct drm_device *dev,
 				       &intel_plane_funcs,
 				       intel_cursor_formats,
 				       ARRAY_SIZE(intel_cursor_formats),
-				       DRM_PLANE_TYPE_CURSOR, NULL);
+				       DRM_PLANE_TYPE_CURSOR,
+				       "cursor %c", pipe_name(pipe));
 	if (ret)
 		goto fail;
 

drivers/gpu/drm/i915/intel_sprite.c

@@ -1114,10 +1114,18 @@ intel_plane_init(struct drm_device *dev, enum pipe pipe, int plane)
 
 	possible_crtcs = (1 << pipe);
 
+	if (INTEL_INFO(dev)->gen >= 9)
 		ret = drm_universal_plane_init(dev, &intel_plane->base, possible_crtcs,
 					       &intel_plane_funcs,
 					       plane_formats, num_plane_formats,
-				       DRM_PLANE_TYPE_OVERLAY, NULL);
+					       DRM_PLANE_TYPE_OVERLAY,
+					       "plane %d%c", plane + 2, pipe_name(pipe));
+	else
+		ret = drm_universal_plane_init(dev, &intel_plane->base, possible_crtcs,
+					       &intel_plane_funcs,
+					       plane_formats, num_plane_formats,
+					       DRM_PLANE_TYPE_OVERLAY,
+					       "sprite %c", sprite_name(pipe, plane));
 	if (ret)
 		goto fail;