linux-kernel - [PATCH v4 3/4] soundwire: qcom: Add set_channel

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Message-ID: <20241209045551.1404782-4-quic_mohs@quicinc.com>
Date: Mon, 9 Dec 2024 10:25:50 +0530
From: Mohammad Rafi Shaik <quic_mohs@...cinc.com>
To: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Liam Girdwood
	<lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>,
        Rob Herring
	<robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley
	<conor+dt@...nel.org>, Vinod Koul <vkoul@...nel.org>,
        Bard Liao
	<yung-chuan.liao@...ux.intel.com>,
        Jaroslav Kysela <perex@...ex.cz>, "Takashi
 Iwai" <tiwai@...e.com>
CC: Pierre-Louis Bossart <pierre-louis.bossart@...ux.dev>,
        Sanyog Kale
	<sanyog.r.kale@...el.com>,
        <linux-arm-msm@...r.kernel.org>, <linux-sound@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <quic_pkumpatl@...cinc.com>, <kernel@...cinc.com>,
        Mohammad Rafi Shaik <quic_mohs@...cinc.com>
Subject: [PATCH v4 3/4] soundwire: qcom: Add set_channel_map api support

Added qcom_swrm_set_channel_map api to set the master channel mask for
TX and RX paths based on the provided slots.

Added a new field ch_mask to the qcom_swrm_port_config structure.
This field is used to store the master channel mask, which allows more
flexible to configure channel mask in runtime for specific active
soundwire ports.

Modified the qcom_swrm_port_enable function to configure master
channel mask. If the ch_mask is set to SWR_INVALID_PARAM or is zero,
the function will use the default channel mask.

Signed-off-by: Mohammad Rafi Shaik <quic_mohs@...cinc.com>
---
 drivers/soundwire/qcom.c | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/drivers/soundwire/qcom.c b/drivers/soundwire/qcom.c
index e00c5ac496a6..86763ba3a3b2 100644
--- a/drivers/soundwire/qcom.c
+++ b/drivers/soundwire/qcom.c
@@ -156,6 +156,7 @@ struct qcom_swrm_port_config {
 	u8 word_length;
 	u8 blk_group_count;
 	u8 lane_control;
+	u8 ch_mask;
 };
 
 /*
@@ -1048,9 +1049,13 @@ static int qcom_swrm_port_enable(struct sdw_bus *bus,
 {
 	u32 reg = SWRM_DP_PORT_CTRL_BANK(enable_ch->port_num, bank);
 	struct qcom_swrm_ctrl *ctrl = to_qcom_sdw(bus);
+	struct qcom_swrm_port_config *pcfg;
 	u32 val;
 
+	pcfg = &ctrl->pconfig[enable_ch->port_num];
 	ctrl->reg_read(ctrl, reg, &val);
+	if (pcfg->ch_mask != SWR_INVALID_PARAM && pcfg->ch_mask != 0)
+		enable_ch->ch_mask = pcfg->ch_mask;
 
 	if (enable_ch->enable)
 		val |= (enable_ch->ch_mask << SWRM_DP_PORT_CTRL_EN_CHAN_SHFT);
@@ -1270,6 +1275,27 @@ static void *qcom_swrm_get_sdw_stream(struct snd_soc_dai *dai, int direction)
 	return ctrl->sruntime[dai->id];
 }
 
+static int qcom_swrm_set_channel_map(struct snd_soc_dai *dai,
+				     unsigned int tx_num, unsigned int *tx_slot,
+				     unsigned int rx_num, unsigned int *rx_slot)
+{
+	struct qcom_swrm_ctrl *ctrl = dev_get_drvdata(dai->dev);
+	struct sdw_stream_runtime *sruntime = ctrl->sruntime[dai->id];
+	int i;
+
+	if (tx_slot) {
+		for (i = 0; i < tx_num; i++)
+			ctrl->pconfig[i].ch_mask = tx_slot[i];
+	}
+
+	if (rx_slot) {
+		for (i = 0; i < rx_num; i++)
+			ctrl->pconfig[i].ch_mask = rx_slot[i];
+	}
+
+	return 0;
+}
+
 static int qcom_swrm_startup(struct snd_pcm_substream *substream,
 			     struct snd_soc_dai *dai)
 {
@@ -1306,6 +1332,7 @@ static const struct snd_soc_dai_ops qcom_swrm_pdm_dai_ops = {
 	.shutdown = qcom_swrm_shutdown,
 	.set_stream = qcom_swrm_set_sdw_stream,
 	.get_stream = qcom_swrm_get_sdw_stream,
+	.set_channel_map = qcom_swrm_set_channel_map,
 };
 
 static const struct snd_soc_component_driver qcom_swrm_dai_component = {
-- 
2.34.1