linux-kernel - [PATCH] ASoC: SOF: mediatek: add pcm_hw

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Date:   Sat, 17 Sep 2022 10:26:10 +0800
From:   Chunxu Li <chunxu.li@...iatek.com>
To:     <broonie@...nel.org>, <pierre-louis.bossart@...ux.intel.com>,
        <peter.ujfalusi@...ux.intel.com>, <lgirdwood@...il.com>,
        <angelogioacchino.delregno@...labora.com>, <daniel.baluta@....com>
CC:     <matthias.bgg@...il.com>, <yc.hung@...iatek.com>,
        <linux-kernel@...r.kernel.org>, <alsa-devel@...a-project.org>,
        <sound-open-firmware@...a-project.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        <project_global_chrome_upstream_group@...iatek.com>,
        Chunxu Li <chunxu.li@...iatek.com>
Subject: [PATCH] ASoC: SOF: mediatek: add pcm_hw_params callback for mt8186

add pcm_hw_params callback for mt8186 to support continue
update dma host position

Signed-off-by: Chunxu Li <chunxu.li@...iatek.com>
---
 sound/soc/sof/mediatek/mt8186/mt8186.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/sound/soc/sof/mediatek/mt8186/mt8186.c b/sound/soc/sof/mediatek/mt8186/mt8186.c
index a1be5d74f40b..9ec89fc7fec0 100644
--- a/sound/soc/sof/mediatek/mt8186/mt8186.c
+++ b/sound/soc/sof/mediatek/mt8186/mt8186.c
@@ -460,6 +460,16 @@ static int mt8186_get_bar_index(struct snd_sof_dev *sdev, u32 type)
 	return type;
 }
 
+static int mt8186_pcm_hw_params(struct snd_sof_dev *sdev,
+				struct snd_pcm_substream *substream,
+				struct snd_pcm_hw_params *params,
+				struct snd_sof_platform_stream_params *platform_params)
+{
+	platform_params->cont_update_posn = 1;
+
+	return 0;
+}
+
 static struct snd_soc_dai_driver mt8186_dai[] = {
 {
 	.name = "SOF_DL1",
@@ -526,6 +536,7 @@ static struct snd_sof_dsp_ops sof_mt8186_ops = {
 
 	/* stream callbacks */
 	.pcm_open	= sof_stream_pcm_open,
+	.pcm_hw_params	= mt8186_pcm_hw_params,
 	.pcm_close	= sof_stream_pcm_close,
 
 	/* firmware loading */
-- 
2.25.1