mmVGT_ESGS_RING_SIZE
data = RREG32_SOC15(GC, 0, mmVGT_ESGS_RING_SIZE);
WREG32_SOC15(GC, 0, mmVGT_ESGS_RING_SIZE, 0);
if (RREG32_SOC15(GC, 0, mmVGT_ESGS_RING_SIZE) == pattern) {
WREG32_SOC15(GC, 0, mmVGT_ESGS_RING_SIZE, data);
(SOC15_REG_OFFSET(GC, 0, mmVGT_ESGS_RING_SIZE) <<