drm/xe/xe2: Add MCR register steering for media GT

Xe2 media has a few types of MCR registers, but all except for "GPMXMT"
can safely steer to instance 0,0.  GPMXMT follows the same rules that
MTL's OADDRM ranges did, so it can re-use the same enum value.

Bspec: 71186
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Matt Atwood <matthew.s.atwood@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

drivers/gpu/drm/xe/xe_gt_mcr.c

@@ -214,6 +214,23 @@ static const struct xe_mmio_range xe2lpg_instance0_steering_table[] = {
 	{},
 };
 
+static const struct xe_mmio_range xe2lpm_gpmxmt_steering_table[] = {
+	{ 0x388160, 0x38817F },
+	{ 0x389480, 0x3894CF },
+	{},
+};
+
+static const struct xe_mmio_range xe2lpm_instance0_steering_table[] = {
+	{ 0x384000, 0x3847DF },         /* GAM, rsvd, GAM */
+	{ 0x384900, 0x384AFF },         /* GAM */
+	{ 0x389560, 0x3895FF },         /* MEDIAINF */
+	{ 0x38B600, 0x38B8FF },         /* L3BANK */
+	{ 0x38C800, 0x38D07F },         /* GAM, MEDIAINF */
+	{ 0x38F000, 0x38F0FF },         /* GAM */
+	{ 0x393C00, 0x393C7F },         /* MEDIAINF */
+	{},
+};
+
 static void init_steering_l3bank(struct xe_gt *gt)
 {
 	if (GRAPHICS_VERx100(gt_to_xe(gt)) >= 1270) {
@@ -322,7 +339,7 @@ static const struct {
 	[MSLICE] =	{ "MSLICE",	init_steering_mslice },
 	[LNCF] =	{ "LNCF",	NULL }, /* initialized by mslice init */
 	[DSS] =		{ "DSS",	init_steering_dss },
-	[OADDRM] =	{ "OADDRM",	init_steering_oaddrm },
+	[OADDRM] =	{ "OADDRM / GPMXMT", init_steering_oaddrm },
 	[SQIDI_PSMI] =  { "SQIDI_PSMI", init_steering_sqidi_psmi },
 	[INSTANCE0] =	{ "INSTANCE 0",	init_steering_inst0 },
 	[IMPLICIT_STEERING] = { "IMPLICIT", NULL },
@@ -340,7 +357,12 @@ void xe_gt_mcr_init(struct xe_gt *gt)
 	if (gt->info.type == XE_GT_TYPE_MEDIA) {
 		drm_WARN_ON(&xe->drm, MEDIA_VER(xe) < 13);
 
-		gt->steering[OADDRM].ranges = xelpmp_oaddrm_steering_table;
+		if (MEDIA_VER(xe) >= 20) {
+			gt->steering[OADDRM].ranges = xe2lpm_gpmxmt_steering_table;
+			gt->steering[INSTANCE0].ranges = xe2lpm_instance0_steering_table;
+		} else {
+			gt->steering[OADDRM].ranges = xelpmp_oaddrm_steering_table;
+		}
 	} else {
 		if (GRAPHICS_VER(xe) >= 20) {
 			gt->steering[DSS].ranges = xe2lpg_dss_steering_table;