linux-kernel - [PATCH 7/7] ASoC: SOF: amd: clear dsp to host interrupt status

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Message-ID: <20230823073340.2829821-7-Vijendar.Mukunda@amd.com>
Date:   Wed, 23 Aug 2023 13:03:39 +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>,
        Venkata Prasad Potturu <venkataprasad.potturu@....com>,
        Mastan Katragadda <Mastan.Katragadda@....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 7/7] ASoC: SOF: amd: clear dsp to host interrupt status

DSP_SW_INTR_STAT_OFFSET is a common interrupt register which will be
accessed by both ACP firmware and driver. This register contains register
bits corresponds to host to dsp interrupts and vice versa.

when dsp to host interrupt is reported, only clear dsp to host
interrupt bit in DSP_SW_INTR_STAT_OFFSET.

Fixes: 2e7c6652f9b8 ("ASoC: SOF: amd: Fix for handling spurious interrupts from DSP")

Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@....com>
---
 sound/soc/sof/amd/acp.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/sound/soc/sof/amd/acp.c b/sound/soc/sof/amd/acp.c
index eceba9b794ab..19a801908b56 100644
--- a/sound/soc/sof/amd/acp.c
+++ b/sound/soc/sof/amd/acp.c
@@ -367,9 +367,9 @@ static irqreturn_t acp_irq_handler(int irq, void *dev_id)
 	unsigned int val;
 
 	val = snd_sof_dsp_read(sdev, ACP_DSP_BAR, base + DSP_SW_INTR_STAT_OFFSET);
-	if (val) {
-		val |= ACP_DSP_TO_HOST_IRQ;
-		snd_sof_dsp_write(sdev, ACP_DSP_BAR, base + DSP_SW_INTR_STAT_OFFSET, val);
+	if (val & ACP_DSP_TO_HOST_IRQ) {
+		snd_sof_dsp_write(sdev, ACP_DSP_BAR, base + DSP_SW_INTR_STAT_OFFSET,
+				  ACP_DSP_TO_HOST_IRQ);
 		return IRQ_WAKE_THREAD;
 	}
 
-- 
2.34.1