ASoC: amd: acp: remove acp poweroff function

BIOS invokes ACP Power off sequence based on ACP device state.
Remove redundant code from ACP PCI driver for ACP Power off sequence.

Signed-off-by: Syed Saba Kareem <Syed.SabaKareem@amd.com>
Link: https://lore.kernel.org/r/Message-Id: <20230622152406.3709231-4-Syed.SabaKareem@amd.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: saba-kareem

sound/soc/amd/acp/acp-rembrandt.c

@@ -204,23 +204,6 @@ static int acp6x_power_on(void __iomem *base)
 	return -ETIMEDOUT;
 }
 
-static int acp6x_power_off(void __iomem *base)
-{
-	u32 val;
-	int timeout;
-
-	writel(ACP_PGFSM_CNTL_POWER_OFF_MASK,
-	       base + ACP6X_PGFSM_CONTROL);
-	timeout = 0;
-	while (++timeout < 500) {
-		val = readl(base + ACP6X_PGFSM_STATUS);
-		if ((val & ACP_PGFSM_STATUS_MASK) == ACP_POWERED_OFF)
-			return 0;
-		udelay(1);
-	}
-	return -ETIMEDOUT;
-}
-
 static int acp6x_reset(void __iomem *base)
 {
 	u32 val;
@@ -299,14 +282,6 @@ static int rmb_acp_deinit(void __iomem *base)
 	}
 
 	writel(0x00, base + ACP_CONTROL);
-
-	/* power off */
-	ret = acp6x_power_off(base);
-	if (ret) {
-		pr_err("ACP power off failed\n");
-		return ret;
-	}
-
 	return 0;
 }
 

sound/soc/amd/acp/acp-renoir.c

@@ -169,17 +169,6 @@ static int acp3x_power_on(void __iomem *base)
 	return readl_poll_timeout(base + ACP_PGFSM_STATUS, val, !val, DELAY_US, ACP_TIMEOUT);
 }
 
-static int acp3x_power_off(void __iomem *base)
-{
-	u32 val;
-
-	writel(ACP_PWR_OFF_MASK, base + ACP_PGFSM_CONTROL);
-
-	return readl_poll_timeout(base + ACP_PGFSM_STATUS, val,
-				  (val & ACP_PGFSM_STAT_MASK) == ACP_POWERED_OFF,
-				  DELAY_US, ACP_TIMEOUT);
-}
-
 static int acp3x_reset(void __iomem *base)
 {
 	u32 val;
@@ -246,12 +235,6 @@ static int rn_acp_deinit(void __iomem *base)
 		return ret;
 
 	writel(0x00, base + ACP_CONTROL);
-
-	/* power off */
-	ret = acp3x_power_off(base);
-	if (ret)
-		return ret;
-
 	return 0;
 }
 static int renoir_audio_probe(struct platform_device *pdev)