linux-kernel - [PATCH 5/7] ASoC: SOF: amd: add conditional check for acp_clkmux

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Date:   Wed, 23 Aug 2023 13:03:37 +0530
From:   Vijendar Mukunda <Vijendar.Mukunda@....com>
To:     <broonie@...nel.org>
CC:     <alsa-devel@...a-project.org>, <Basavaraj.Hiregoudar@....com>,
        <Sunil-kumar.Dommati@....com>,
        Vijendar Mukunda <Vijendar.Mukunda@....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>,
        Daniel Baluta <daniel.baluta@....com>,
        Kai Vehmanen <kai.vehmanen@...ux.intel.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        V sujith kumar Reddy <Vsujithkumar.Reddy@....com>,
        Mastan Katragadda <Mastan.Katragadda@....com>,
        Venkata Prasad Potturu <venkataprasad.potturu@....com>,
        Ajit Kumar Pandey <AjitKumar.Pandey@....com>,
        "moderated list:SOUND - SOUND OPEN FIRMWARE (SOF) DRIVERS" 
        <sound-open-firmware@...a-project.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: [PATCH 5/7] ASoC: SOF: amd: add conditional check for acp_clkmux_sel register

Few AMD platforms require ACP ACLK as clock source.
Add conditional check for clock mux selection register for
switching between internal clock and ACP ACLK.

Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@....com>
---
 sound/soc/sof/amd/acp.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sound/soc/sof/amd/acp.c b/sound/soc/sof/amd/acp.c
index 61faae74d637..eceba9b794ab 100644
--- a/sound/soc/sof/amd/acp.c
+++ b/sound/soc/sof/amd/acp.c
@@ -423,7 +423,9 @@ 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);
+	if (desc->acp_clkmux_sel)
+		snd_sof_dsp_write(sdev, ACP_DSP_BAR, desc->acp_clkmux_sel, ACP_CLOCK_ACLK);
+
 	if (desc->ext_intr_enb)
 		snd_sof_dsp_write(sdev, ACP_DSP_BAR, desc->ext_intr_enb, 0x01);
 
-- 
2.34.1