linux-kernel - [PATCH 2/4] ASoC: SOF: amd: Fix for selecting clock source as external clock.

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Date:   Tue, 15 Nov 2022 12:49:54 +0530
From:   V sujith kumar Reddy <Vsujithkumar.Reddy@....com>
To:     <broonie@...nel.org>, <alsa-devel@...a-project.org>
CC:     <Vijendar.Mukunda@....com>, <Basavaraj.Hiregoudar@....com>,
        <Sunil-kumar.Dommati@....com>, <venkataprasad.potturu@....com>,
        <ssabakar@....com>,
        V sujith kumar Reddy <Vsujithkumar.Reddy@....com>,
        Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Peter Ujfalusi <peter.ujfalusi@...ux.intel.com>,
        "Bard Liao" <yung-chuan.liao@...ux.intel.com>,
        Ranjani Sridharan <ranjani.sridharan@...ux.intel.com>,
        Kai Vehmanen <kai.vehmanen@...ux.intel.com>,
        Daniel Baluta <daniel.baluta@....com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        "Ajit Kumar Pandey" <AjitKumar.Pandey@....com>,
        Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>,
        "moderated list:SOUND - SOUND OPEN FIRMWARE (SOF) DRIVERS" 
        <sound-open-firmware@...a-project.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: [PATCH 2/4] ASoC: SOF: amd: Fix for selecting clock source as external clock.

By default clock source is selected as internal clock of 96Mhz
which is not configurable. Now we select the clock source to
external clock (ACLK) which can be configurable to different clock
ranges depending on usecase.

Signed-off-by: V sujith kumar Reddy <Vsujithkumar.Reddy@....com>
---
 sound/soc/sof/amd/acp.c | 4 +++-
 sound/soc/sof/amd/acp.h | 8 ++++++++
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/sound/soc/sof/amd/acp.c b/sound/soc/sof/amd/acp.c
index 36966643e36a..47115a77c92c 100644
--- a/sound/soc/sof/amd/acp.c
+++ b/sound/soc/sof/amd/acp.c
@@ -390,6 +390,7 @@ static int acp_power_on(struct snd_sof_dev *sdev)
 
 static int acp_reset(struct snd_sof_dev *sdev)
 {
+	const struct sof_amd_acp_desc *desc = get_chip_info(sdev->pdata);
 	unsigned int val;
 	int ret;
 
@@ -410,6 +411,7 @@ static int acp_reset(struct snd_sof_dev *sdev)
 	if (ret < 0)
 		dev_err(sdev->dev, "timeout in releasing reset\n");
 
+	snd_sof_dsp_write(sdev, ACP_DSP_BAR, desc->acp_clkmux_sel, ACP_CLOCK_ACLK);
 	return ret;
 }
 
@@ -456,7 +458,7 @@ int amd_sof_acp_resume(struct snd_sof_dev *sdev)
 		return ret;
 	}
 
-	snd_sof_dsp_write(sdev, ACP_DSP_BAR, desc->acp_clkmux_sel, 0x03);
+	snd_sof_dsp_write(sdev, ACP_DSP_BAR, desc->acp_clkmux_sel, ACP_CLOCK_ACLK);
 
 	ret = acp_memory_init(sdev);
 
diff --git a/sound/soc/sof/amd/acp.h b/sound/soc/sof/amd/acp.h
index 1529c6d9bf9b..76ad963faec1 100644
--- a/sound/soc/sof/amd/acp.h
+++ b/sound/soc/sof/amd/acp.h
@@ -69,6 +69,14 @@
 #define BOX_SIZE_512				0x200
 #define BOX_SIZE_1024				0x400
 
+enum clock_source {
+	ACP_CLOCK_96M = 0,
+	ACP_CLOCK_48M,
+	ACP_CLOCK_24M,
+	ACP_CLOCK_ACLK,
+	ACP_CLOCK_MCLK,
+};
+
 struct  acp_atu_grp_pte {
 	u32 low;
 	u32 high;
-- 
2.25.1