linux-kernel - [PATCH v2] ASoC: dwc: always enable/disable i2s irqs

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Message-ID: <20250330130852.37881-3-bradynorander@gmail.com>
Date: Sun, 30 Mar 2025 09:08:54 -0400
From: Brady Norander <bradynorander@...il.com>
To: Mark Brown <broonie@...nel.org>,
	linux-kernel@...r.kernel.org,
	alsa-devel@...a-project.org
Cc: Jaroslav Kysela <perex@...ex.cz>,
	Takashi Iwai <tiwai@...e.com>,
	u.kleine-koenig@...libre.com,
	Brady Norander <bradynorander@...il.com>
Subject: [PATCH v2] ASoC: dwc: always enable/disable i2s irqs

Commit a42e988 ("ASoC: dwc: add DMA handshake control") changed the
behavior of the driver to not enable or disable i2s irqs if using DMA. This
breaks platforms such as AMD ACP. Audio playback appears to work but no
audio can be heard. Revert to the old behavior by always enabling and
disabling i2s irqs while keeping DMA handshake control.

Fixes: a42e988 ("ASoC: dwc: add DMA handshake control")
Signed-off-by: Brady Norander <bradynorander@...il.com>
---
v2: reword commit message to better describe the issue
---
 sound/soc/dwc/dwc-i2s.c | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/sound/soc/dwc/dwc-i2s.c b/sound/soc/dwc/dwc-i2s.c
index 57b789d7fbed..5b4f20dbf7bb 100644
--- a/sound/soc/dwc/dwc-i2s.c
+++ b/sound/soc/dwc/dwc-i2s.c
@@ -199,12 +199,10 @@ static void i2s_start(struct dw_i2s_dev *dev,
 	else
 		i2s_write_reg(dev->i2s_base, IRER, 1);
 
-	/* I2S needs to enable IRQ to make a handshake with DMAC on the JH7110 SoC */
-	if (dev->use_pio || dev->is_jh7110)
-		i2s_enable_irqs(dev, substream->stream, config->chan_nr);
-	else
+	if (!(dev->use_pio || dev->is_jh7110))
 		i2s_enable_dma(dev, substream->stream);
 
+	i2s_enable_irqs(dev, substream->stream, config->chan_nr);
 	i2s_write_reg(dev->i2s_base, CER, 1);
 }
 
@@ -218,11 +216,12 @@ static void i2s_stop(struct dw_i2s_dev *dev,
 	else
 		i2s_write_reg(dev->i2s_base, IRER, 0);
 
-	if (dev->use_pio || dev->is_jh7110)
-		i2s_disable_irqs(dev, substream->stream, 8);
-	else
+	if (!(dev->use_pio || dev->is_jh7110))
 		i2s_disable_dma(dev, substream->stream);
 
+	i2s_disable_irqs(dev, substream->stream, 8);
+
+
 	if (!dev->active) {
 		i2s_write_reg(dev->i2s_base, CER, 0);
 		i2s_write_reg(dev->i2s_base, IER, 0);
-- 
2.49.0