linux-kernel - [PATCH v4 2/4] ASoC: qcom: q6apm-lpass-dais: Implement proper channel mapping

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Message-Id: <20240520-asoc-x1e80100-4-channel-mapping-v4-2-f657159b4aad@linaro.org>
Date: Mon, 20 May 2024 16:19:57 +0200
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: James Schulman <james.schulman@...rus.com>, 
 David Rhodes <david.rhodes@...rus.com>, 
 Richard Fitzgerald <rf@...nsource.cirrus.com>, 
 Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>, 
 Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>, 
 Lars-Peter Clausen <lars@...afoo.de>, 
 Nuno Sá <nuno.sa@...log.com>, 
 Srinivas Kandagatla <srinivas.kandagatla@...aro.org>, 
 Banajit Goswami <bgoswami@...cinc.com>
Cc: alsa-devel@...a-project.org, patches@...nsource.cirrus.com, 
 linux-sound@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Subject: [PATCH v4 2/4] ASoC: qcom: q6apm-lpass-dais: Implement proper
 channel mapping

The set_channel_map() implementation in q6apm-lpass-dais driver was
copying older pre-Audioreach code from q6afe-dai driver, but not really
using it.  The code sets active channel mask based on passed channel
mapping, but Audioreach code does not use that mask ever.  Audioreach
module configuration does have on the other hand proper channel mapping
field, which should supersed that active channel mask.

Drop the unused active channel mask and implement proper mapping of
channels in q6apm-lpass-dais driver.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>

---

Changes in v3/v4:
1. None

Changes in v2:
1. Entirely replaced - now channel mapping is implemented in
   q6apm-lpass-dais.
---
 sound/soc/qcom/qdsp6/audioreach.h       |  1 -
 sound/soc/qcom/qdsp6/q6apm-lpass-dais.c | 10 +++++-----
 2 files changed, 5 insertions(+), 6 deletions(-)

diff --git a/sound/soc/qcom/qdsp6/audioreach.h b/sound/soc/qcom/qdsp6/audioreach.h
index 2c82917b7162..eb9306280988 100644
--- a/sound/soc/qcom/qdsp6/audioreach.h
+++ b/sound/soc/qcom/qdsp6/audioreach.h
@@ -755,7 +755,6 @@ struct audioreach_module_config {
 
 	u16	data_format;
 	u16	num_channels;
-	u16	active_channels_mask;
 	u16	dp_idx;
 	u32	channel_allocation;
 	u32	sd_line_mask;
diff --git a/sound/soc/qcom/qdsp6/q6apm-lpass-dais.c b/sound/soc/qcom/qdsp6/q6apm-lpass-dais.c
index 6bfbb52345e1..a4ad1d0e6abd 100644
--- a/sound/soc/qcom/qdsp6/q6apm-lpass-dais.c
+++ b/sound/soc/qcom/qdsp6/q6apm-lpass-dais.c
@@ -33,7 +33,7 @@ static int q6dma_set_channel_map(struct snd_soc_dai *dai,
 
 	struct q6apm_lpass_dai_data *dai_data = dev_get_drvdata(dai->dev);
 	struct audioreach_module_config *cfg = &dai_data->module_config[dai->id];
-	int ch_mask;
+	int i;
 
 	switch (dai->id) {
 	case WSA_CODEC_DMA_TX_0:
@@ -58,7 +58,8 @@ static int q6dma_set_channel_map(struct snd_soc_dai *dai,
 				tx_num);
 			return -EINVAL;
 		}
-		ch_mask = *tx_ch_mask;
+		for (i = 0; i < tx_num; i++)
+			cfg->channel_map[i] = tx_ch_mask[i];
 
 		break;
 	case WSA_CODEC_DMA_RX_0:
@@ -81,7 +82,8 @@ static int q6dma_set_channel_map(struct snd_soc_dai *dai,
 				rx_num);
 			return -EINVAL;
 		}
-		ch_mask = *rx_ch_mask;
+		for (i = 0; i < rx_num; i++)
+			cfg->channel_map[i] = rx_ch_mask[i];
 
 		break;
 	default:
@@ -90,8 +92,6 @@ static int q6dma_set_channel_map(struct snd_soc_dai *dai,
 		return -EINVAL;
 	}
 
-	cfg->active_channels_mask = ch_mask;
-
 	return 0;
 }
 

-- 
2.43.0