drm/xe/hwmon: Expose card power and energy attributes of BMG

In BMG there are separate registers for card/platform power and
energy.
These are exposed through channel 0 i.e power_1/energy1_xxx.
Signed-off-by: Karthik Poosa <karthik.poosa@intel.com>
Reviewed-by: Badal Nilawar <badal.nilawar@intel.com>
Link: https://lore.kernel.org/r/20240523144351.4040131-3-balasubramani.vivekanandan@intel.comSigned-off-by: Balasubramani Vivekanandan <balasubramani.vivekanandan@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240529050758.442056-3-balasubramani.vivekanandan@intel.comSigned-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

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

@@ -22,5 +22,7 @@
 #define BMG_PACKAGE_POWER_SKU_UNIT		XE_REG(0x1380dc)
 #define BMG_PACKAGE_ENERGY_STATUS		XE_REG(0x138120)
 #define BMG_PACKAGE_RAPL_LIMIT			XE_REG(0x138440)
+#define BMG_PLATFORM_ENERGY_STATUS		XE_REG(0x138458)
+#define BMG_PLATFORM_POWER_LIMIT		XE_REG(0x138460)
 
 #endif /* _XE_PCODE_REGS_H_ */

drivers/gpu/drm/xe/xe_hwmon.c

@@ -86,12 +86,16 @@ static struct xe_reg xe_hwmon_get_reg(struct xe_hwmon *hwmon, enum xe_hwmon_reg
 
 	switch (hwmon_reg) {
 	case REG_PKG_RAPL_LIMIT:
-		if (xe->info.platform == XE_BATTLEMAGE && channel == CHANNEL_PKG)
-			return BMG_PACKAGE_RAPL_LIMIT;
-		else if (xe->info.platform == XE_PVC && channel == CHANNEL_PKG)
+		if (xe->info.platform == XE_BATTLEMAGE) {
+			if (channel == CHANNEL_PKG)
+				return BMG_PACKAGE_RAPL_LIMIT;
+			else
+				return BMG_PLATFORM_POWER_LIMIT;
+		} else if (xe->info.platform == XE_PVC && channel == CHANNEL_PKG) {
 			return PVC_GT0_PACKAGE_RAPL_LIMIT;
-		else if ((xe->info.platform == XE_DG2) && (channel == CHANNEL_PKG))
+		} else if ((xe->info.platform == XE_DG2) && (channel == CHANNEL_PKG)) {
 			return PCU_CR_PACKAGE_RAPL_LIMIT;
+		}
 		break;
 	case REG_PKG_POWER_SKU:
 		if (xe->info.platform == XE_BATTLEMAGE)
@@ -114,12 +118,16 @@ static struct xe_reg xe_hwmon_get_reg(struct xe_hwmon *hwmon, enum xe_hwmon_reg
 			return GT_PERF_STATUS;
 		break;
 	case REG_PKG_ENERGY_STATUS:
-		if (xe->info.platform == XE_BATTLEMAGE && channel == CHANNEL_PKG)
-			return BMG_PACKAGE_ENERGY_STATUS;
-		else if (xe->info.platform == XE_PVC && channel == CHANNEL_PKG)
+		if (xe->info.platform == XE_BATTLEMAGE) {
+			if (channel == CHANNEL_PKG)
+				return BMG_PACKAGE_ENERGY_STATUS;
+			else
+				return BMG_PLATFORM_ENERGY_STATUS;
+		} else if (xe->info.platform == XE_PVC && channel == CHANNEL_PKG) {
 			return PVC_GT0_PLATFORM_ENERGY_STATUS;
-		else if ((xe->info.platform == XE_DG2) && (channel == CHANNEL_PKG))
+		} else if ((xe->info.platform == XE_DG2) && (channel == CHANNEL_PKG)) {
 			return PCU_CR_PACKAGE_ENERGY_STATUS;
+		}
 		break;
 	default:
 		drm_warn(&xe->drm, "Unknown xe hwmon reg id: %d\n", hwmon_reg);