linux-kernel - [PATCH 8/8] ASoC: amd: acp: add pcm constraints for buffer size and period size

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Date: Mon, 17 Jun 2024 12:58:41 +0530
From: Vijendar Mukunda <Vijendar.Mukunda@....com>
To: <broonie@...nel.org>
CC: <alsa-devel@...a-project.org>, <venkataprasad.potturu@....com>,
	<Basavaraj.Hiregoudar@....com>, <Sunil-kumar.Dommati@....com>, "Vijendar
 Mukunda" <Vijendar.Mukunda@....com>, Liam Girdwood <lgirdwood@...il.com>,
	Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>, "Syed Saba
 Kareem" <Syed.SabaKareem@....com>, "open list:SOUND - SOC LAYER / DYNAMIC
 AUDIO POWER MANAGEM..." <linux-sound@...r.kernel.org>, open list
	<linux-kernel@...r.kernel.org>
Subject: [PATCH 8/8] ASoC: amd: acp: add pcm constraints for buffer size and period size

ACP common dma driver has a buffer size and period size restriction
which should be 64 byte aligned. Add pcm constraints for the same.

Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@....com>
---
 sound/soc/amd/acp/acp-platform.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/sound/soc/amd/acp/acp-platform.c b/sound/soc/amd/acp/acp-platform.c
index aaac8aa744cb..4f409cd09c11 100644
--- a/sound/soc/amd/acp/acp-platform.c
+++ b/sound/soc/amd/acp/acp-platform.c
@@ -197,6 +197,20 @@ static int acp_dma_open(struct snd_soc_component *component, struct snd_pcm_subs
 	else
 		runtime->hw = acp_pcm_hardware_capture;
 
+	ret = snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, DMA_SIZE);
+	if (ret) {
+		dev_err(component->dev, "set hw constraint HW_PARAM_PERIOD_BYTES failed\n");
+		kfree(stream);
+		return ret;
+	}
+
+	ret = snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, DMA_SIZE);
+	if (ret) {
+		dev_err(component->dev, "set hw constraint HW_PARAM_BUFFER_BYTES failed\n");
+		kfree(stream);
+		return ret;
+	}
+
 	ret = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
 	if (ret < 0) {
 		dev_err(component->dev, "set integer constraint failed\n");
-- 
2.34.1