drm/xe/xelpmp: Add Wa_16021867713

This workaround applies to all steppings of Xe_LPM+. Implement the KMD
part.

Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://lore.kernel.org/r/20231106210655.175109-3-gustavo.sousa@intel.com
Signed-off-by: Gustavo Sousa <gustavo.sousa@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

drivers/gpu/drm/xe/regs/xe_engine_regs.h

@@ -118,4 +118,7 @@
 #define VDBOX_CGCTL3F18(base)			XE_REG((base) + 0x3f18)
 #define   ALNUNIT_CLKGATE_DIS			REG_BIT(13)
 
+#define VDBOX_CGCTL3F1C(base)			XE_REG((base) + 0x3f1c)
+#define   MFXPIPE_CLKGATE_DIS			REG_BIT(3)
+
 #endif

drivers/gpu/drm/xe/xe_wa.c

@@ -248,6 +248,12 @@ static const struct xe_rtp_entry_sr gt_was[] = {
 
 	/* Xe_LPM+ */
 
+	{ XE_RTP_NAME("16021867713"),
+	  XE_RTP_RULES(MEDIA_VERSION(1300),
+		       ENGINE_CLASS(VIDEO_DECODE)),
+	  XE_RTP_ACTIONS(SET(VDBOX_CGCTL3F1C(0), MFXPIPE_CLKGATE_DIS)),
+	  XE_RTP_ENTRY_FLAG(FOREACH_ENGINE),
+	},
 	{ XE_RTP_NAME("22016670082"),
 	  XE_RTP_RULES(MEDIA_VERSION(1300)),
 	  XE_RTP_ACTIONS(SET(XELPMP_SQCNT1, ENFORCE_RAR))