drm/tegra: dc: Clarify comment about cursor treatment
Signed-off-by: Thierry Reding <treding@nvidia.com>
diff --git a/drivers/gpu/drm/tegra/dc.c b/drivers/gpu/drm/tegra/dc.c
index e424755..6b1dc02f 100644
--- a/drivers/gpu/drm/tegra/dc.c
+++ b/drivers/gpu/drm/tegra/dc.c
@@ -809,9 +809,11 @@
return ERR_PTR(-ENOMEM);
/*
- * We'll treat the cursor as an overlay plane with index 6 here so
- * that the update and activation request bits in DC_CMD_STATE_CONTROL
- * match up.
+ * This index is kind of fake. The cursor isn't a regular plane, but
+ * its update and activation request bits in DC_CMD_STATE_CONTROL do
+ * use the same programming. Setting this fake index here allows the
+ * code in tegra_add_plane_state() to do the right thing without the
+ * need to special-casing the cursor plane.
*/
plane->index = 6;