drm/i915: Document bdw+ pipe interrupt bits

Sprinkle some notes indicating which platforms have which
pipe interrupt bits.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240605111832.21373-3-ville.syrjala@linux.intel.comReviewed-by: Jani Nikula <jani.nikula@intel.com>

drivers/gpu/drm/i915/i915_reg.h

@@ -2502,30 +2502,30 @@
 #define  GEN8_PIPE_FIFO_UNDERRUN	REG_BIT(31)
 #define  GEN8_PIPE_CDCLK_CRC_ERROR	REG_BIT(29)
 #define  GEN8_PIPE_CDCLK_CRC_DONE	REG_BIT(28)
-#define  XELPD_PIPE_SOFT_UNDERRUN	REG_BIT(22)
-#define  XELPD_PIPE_HARD_UNDERRUN	REG_BIT(21)
-#define  GEN12_PIPE_VBLANK_UNMOD	REG_BIT(19)
-#define  GEN8_PIPE_CURSOR_FAULT		REG_BIT(10)
-#define  GEN8_PIPE_SPRITE_FAULT		REG_BIT(9)
-#define  GEN8_PIPE_PRIMARY_FAULT	REG_BIT(8)
-#define  GEN8_PIPE_SPRITE_FLIP_DONE	REG_BIT(5)
-#define  GEN8_PIPE_PRIMARY_FLIP_DONE	REG_BIT(4)
+#define  XELPD_PIPE_SOFT_UNDERRUN	REG_BIT(22) /* adl/dg2+ */
+#define  XELPD_PIPE_HARD_UNDERRUN	REG_BIT(21) /* adl/dg2+ */
+#define  GEN12_PIPE_VBLANK_UNMOD	REG_BIT(19) /* tgl+ */
+#define  GEN8_PIPE_CURSOR_FAULT		REG_BIT(10) /* bdw */
+#define  GEN8_PIPE_SPRITE_FAULT		REG_BIT(9) /* bdw */
+#define  GEN8_PIPE_PRIMARY_FAULT	REG_BIT(8) /* bdw */
+#define  GEN8_PIPE_SPRITE_FLIP_DONE	REG_BIT(5) /* bdw */
+#define  GEN8_PIPE_PRIMARY_FLIP_DONE	REG_BIT(4) /* bdw */
 #define  GEN8_PIPE_SCAN_LINE_EVENT	REG_BIT(2)
 #define  GEN8_PIPE_VSYNC		REG_BIT(1)
 #define  GEN8_PIPE_VBLANK		REG_BIT(0)
-#define  GEN9_PIPE_CURSOR_FAULT		REG_BIT(11)
-#define  GEN11_PIPE_PLANE7_FAULT	REG_BIT(22)
-#define  GEN11_PIPE_PLANE6_FAULT	REG_BIT(21)
-#define  GEN11_PIPE_PLANE5_FAULT	REG_BIT(20)
-#define  GEN9_PIPE_PLANE4_FAULT		REG_BIT(10)
-#define  GEN9_PIPE_PLANE3_FAULT		REG_BIT(9)
-#define  GEN9_PIPE_PLANE2_FAULT		REG_BIT(8)
-#define  GEN9_PIPE_PLANE1_FAULT		REG_BIT(7)
-#define  GEN9_PIPE_PLANE4_FLIP_DONE	REG_BIT(6)
-#define  GEN9_PIPE_PLANE3_FLIP_DONE	REG_BIT(5)
-#define  GEN9_PIPE_PLANE2_FLIP_DONE	REG_BIT(4)
-#define  GEN9_PIPE_PLANE1_FLIP_DONE	REG_BIT(3)
-#define  GEN9_PIPE_PLANE_FLIP_DONE(p)	REG_BIT(3 + (p))
+#define  GEN9_PIPE_CURSOR_FAULT		REG_BIT(11) /* skl+ */
+#define  GEN11_PIPE_PLANE7_FAULT	REG_BIT(22) /* icl/tgl */
+#define  GEN11_PIPE_PLANE6_FAULT	REG_BIT(21) /* icl/tgl */
+#define  GEN11_PIPE_PLANE5_FAULT	REG_BIT(20) /* icl+ */
+#define  GEN9_PIPE_PLANE4_FAULT		REG_BIT(10) /* skl+ */
+#define  GEN9_PIPE_PLANE3_FAULT		REG_BIT(9) /* skl+ */
+#define  GEN9_PIPE_PLANE2_FAULT		REG_BIT(8) /* skl+ */
+#define  GEN9_PIPE_PLANE1_FAULT		REG_BIT(7) /* skl+ */
+#define  GEN9_PIPE_PLANE4_FLIP_DONE	REG_BIT(6) /* skl+ */
+#define  GEN9_PIPE_PLANE3_FLIP_DONE	REG_BIT(5) /* skl+ */
+#define  GEN9_PIPE_PLANE2_FLIP_DONE	REG_BIT(4) /* skl+ */
+#define  GEN9_PIPE_PLANE1_FLIP_DONE	REG_BIT(3) /* skl+ */
+#define  GEN9_PIPE_PLANE_FLIP_DONE(p)	REG_BIT(3 + (p)) /* skl+ */
 #define GEN8_DE_PIPE_IRQ_FAULT_ERRORS \
 	(GEN8_PIPE_CURSOR_FAULT | \
 	 GEN8_PIPE_SPRITE_FAULT | \