ASoC: amd: Allow I2S wake event after ACP is powerd On

ACP_PME_EN allows wake interrupt to be generated when I2S wake
feature is enabled. On turning ACP On, ACP_PME_EN gets cleared.
Setting the bit back ensures that wake event can be received
when ACP is On.
Signed-off-by: Akshu Agrawal <akshu.agrawal@amd.com>
Link: https://lore.kernel.org/r/20200226104746.208656-1-akshu.agrawal@amd.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/amd/raven/pci-acp3x.c

@@ -38,8 +38,13 @@ static int acp3x_power_on(void __iomem *acp3x_base)
 	timeout = 0;
 	while (++timeout < 500) {
 		val = rv_readl(acp3x_base + mmACP_PGFSM_STATUS);
-		if (!val)
+		if (!val) {
+			/* Set PME_EN as after ACP power On,
+			 * PME_EN gets cleared
+			 */
+			rv_writel(0x1, acp3x_base + mmACP_PME_EN);
 			return 0;
+		}
 		udelay(1);
 	}
 	return -ETIMEDOUT;