linux-kernel - [PATCH] ASoC: amd: acp: add ZSC control register programming sequence

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Message-ID: <20240807085154.1987681-1-Vijendar.Mukunda@amd.com>
Date: Wed, 7 Aug 2024 14:21:48 +0530
From: Vijendar Mukunda <Vijendar.Mukunda@....com>
To: <broonie@...nel.org>
CC: <alsa-devel@...a-project.org>, <Basavaraj.Hiregoudar@....com>,
	<Sunil-kumar.Dommati@....com>, <venkataprasad.potturu@....com>,
	<sunpeng.li@....com>, Vijendar Mukunda <Vijendar.Mukunda@....com>, "Liam
 Girdwood" <lgirdwood@...il.com>, Jaroslav Kysela <perex@...ex.cz>, "Takashi
 Iwai" <tiwai@...e.com>, Syed Saba Kareem <Syed.SabaKareem@....com>, "Kuninori
 Morimoto" <kuninori.morimoto.gx@...esas.com>, Jeff Johnson
	<quic_jjohnson@...cinc.com>, "open list:SOUND - SOC LAYER / DYNAMIC AUDIO
 POWER MANAGEM..." <linux-sound@...r.kernel.org>, open list
	<linux-kernel@...r.kernel.org>
Subject: [PATCH] ASoC: amd: acp: add ZSC control register programming sequence

Add ZSC Control register programming sequence for ACP D0 and D3 state
transitions for ACP7.0 onwards. This will allow ACP to enter low power
state when ACP enters D3 state. When ACP enters D0 State, ZSC control
should be disabled.

Tested-by: Leo Li <sunpeng.li@....com>
Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@....com>
---
 sound/soc/amd/acp/acp-legacy-common.c | 5 +++++
 sound/soc/amd/acp/amd.h               | 2 ++
 2 files changed, 7 insertions(+)

diff --git a/sound/soc/amd/acp/acp-legacy-common.c b/sound/soc/amd/acp/acp-legacy-common.c
index 4422cec81e3c..04bd605fdce3 100644
--- a/sound/soc/amd/acp/acp-legacy-common.c
+++ b/sound/soc/amd/acp/acp-legacy-common.c
@@ -321,6 +321,8 @@ int acp_init(struct acp_chip_info *chip)
 		pr_err("ACP reset failed\n");
 		return ret;
 	}
+	if (chip->acp_rev >= ACP70_DEV)
+		writel(0, chip->base + ACP_ZSC_DSP_CTRL);
 	return 0;
 }
 EXPORT_SYMBOL_NS_GPL(acp_init, SND_SOC_ACP_COMMON);
@@ -336,6 +338,9 @@ int acp_deinit(struct acp_chip_info *chip)
 
 	if (chip->acp_rev != ACP70_DEV)
 		writel(0, chip->base + ACP_CONTROL);
+
+	if (chip->acp_rev >= ACP70_DEV)
+		writel(0x01, chip->base + ACP_ZSC_DSP_CTRL);
 	return 0;
 }
 EXPORT_SYMBOL_NS_GPL(acp_deinit, SND_SOC_ACP_COMMON);
diff --git a/sound/soc/amd/acp/amd.h b/sound/soc/amd/acp/amd.h
index 87a4813783f9..c095a34a7229 100644
--- a/sound/soc/amd/acp/amd.h
+++ b/sound/soc/amd/acp/amd.h
@@ -103,6 +103,8 @@
 #define ACP70_PGFSM_CONTROL			ACP6X_PGFSM_CONTROL
 #define ACP70_PGFSM_STATUS			ACP6X_PGFSM_STATUS
 
+#define ACP_ZSC_DSP_CTRL			0x0001014
+#define ACP_ZSC_STS				0x0001018
 #define ACP_SOFT_RST_DONE_MASK	0x00010001
 
 #define ACP_PGFSM_CNTL_POWER_ON_MASK            0xffffffff
-- 
2.34.1