diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 2b8751178f8b..6d9c0e37e9b7 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -4026,8 +4026,8 @@
 #define   PLANE_COLOR_ALPHA_DISABLE			REG_FIELD_PREP(PLANE_COLOR_ALPHA_MASK, 0)
 #define   PLANE_COLOR_ALPHA_SW_PREMULTIPLY		REG_FIELD_PREP(PLANE_COLOR_ALPHA_MASK, 2)
 #define   PLANE_COLOR_ALPHA_HW_PREMULTIPLY		REG_FIELD_PREP(PLANE_COLOR_ALPHA_MASK, 3)
-#define _PLANE_CHICKEN_1_A			0x7026C
-#define _PLANE_CHICKEN_2_A			0x7036C
+#define _PLANE_CHICKEN_1_A			0x7026C /* tgl+ */
+#define _PLANE_CHICKEN_2_A			0x7036C /* tgl+ */
 #define   PLANE_CHICKEN_DISABLE_DPT		REG_BIT(19) /* mtl+ */
 #define _PLANE_BUF_CFG_1_A			0x7027c
 #define _PLANE_BUF_CFG_2_A			0x7037c