From:   Srinivasa Rao Mandadapu <quic_srivasam@quicinc.com>
To:     <agross@kernel.org>, <bjorn.andersson@linaro.org>,
        <lgirdwood@gmail.com>, <broonie@kernel.org>, <robh+dt@kernel.org>,
        <plai@codeaurora.org>, <bgoswami@codeaurora.org>, <perex@perex.cz>,
        <tiwai@suse.com>, <srinivas.kandagatla@linaro.org>,
        <rohitkr@codeaurora.org>, <linux-arm-msm@vger.kernel.org>,
        <alsa-devel@alsa-project.org>, <devicetree@vger.kernel.org>,
        <linux-kernel@vger.kernel.org>, <swboyd@chromium.org>,
        <judyhsiao@chromium.org>
CC:     Srinivasa Rao Mandadapu <quic_srivasam@quicinc.com>,
        "Venkata Prasad Potturu" <quic_potturu@quicinc.com>
Subject: [PATCH v10 04/10] ASoC: qcom: Add helper function to get dma control and lpaif handle
Date:   Tue, 14 Dec 2021 23:06:25 +0530
Message-ID: <1639503391-10715-5-git-send-email-quic_srivasam@quicinc.com>
In-Reply-To: <1639503391-10715-1-git-send-email-quic_srivasam@quicinc.com>
References: <1639503391-10715-1-git-send-email-quic_srivasam@quicinc.com>
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Add support function to get dma control and lpaif handle to avoid
repeated code in platform driver

Signed-off-by: Srinivasa Rao Mandadapu <quic_srivasam@quicinc.com>
Co-developed-by: Venkata Prasad Potturu <quic_potturu@quicinc.com>
Signed-off-by: Venkata Prasad Potturu <quic_potturu@quicinc.com>
Reviewed-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
---
 sound/soc/qcom/lpass-platform.c | 113 +++++++++++++++++++++++-----------------
 1 file changed, 66 insertions(+), 47 deletions(-)

diff --git a/sound/soc/qcom/lpass-platform.c b/sound/soc/qcom/lpass-platform.c
index a44162c..5d77240 100644
--- a/sound/soc/qcom/lpass-platform.c
+++ b/sound/soc/qcom/lpass-platform.c
@@ -177,6 +177,49 @@ static int lpass_platform_pcmops_close(struct snd_soc_component *component,
 	return 0;
 }
 
+static void __lpass_get_lpaif_handle(struct snd_pcm_substream *substream,
+				     struct snd_soc_component *component,
+				     struct lpaif_dmactl **dmactl, int *id, struct regmap **map)
+{
+	struct snd_soc_pcm_runtime *soc_runtime = asoc_substream_to_rtd(substream);
+	struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(soc_runtime, 0);
+	struct lpass_data *drvdata = snd_soc_component_get_drvdata(component);
+	struct snd_pcm_runtime *rt = substream->runtime;
+	struct lpass_pcm_data *pcm_data = rt->private_data;
+	struct lpass_variant *v = drvdata->variant;
+	int dir = substream->stream;
+	unsigned int dai_id = cpu_dai->driver->id;
+	struct lpaif_dmactl *l_dmactl = NULL;
+	struct regmap *l_map = NULL;
+	int l_id = 0;
+
+	switch (dai_id) {
+	case MI2S_PRIMARY ... MI2S_QUINARY:
+		if (dir == SNDRV_PCM_STREAM_PLAYBACK) {
+			l_id = pcm_data->dma_ch;
+			l_dmactl = drvdata->rd_dmactl;
+		} else {
+			l_dmactl = drvdata->wr_dmactl;
+			l_id = pcm_data->dma_ch - v->wrdma_channel_start;
+		}
+		l_map = drvdata->lpaif_map;
+		break;
+	case LPASS_DP_RX:
+		l_id = pcm_data->dma_ch;
+		l_dmactl = drvdata->hdmi_rd_dmactl;
+		l_map = drvdata->hdmiif_map;
+		break;
+	default:
+		break;
+	}
+	if (dmactl)
+		*dmactl = l_dmactl;
+	if (id)
+		*id = l_id;
+	if (map)
+		*map = l_map;
+}
+
 static int lpass_platform_pcmops_hw_params(struct snd_soc_component *component,
 					   struct snd_pcm_substream *substream,
 					   struct snd_pcm_hw_params *params)
@@ -191,21 +234,15 @@ static int lpass_platform_pcmops_hw_params(struct snd_soc_component *component,
 	unsigned int channels = params_channels(params);
 	unsigned int regval;
 	struct lpaif_dmactl *dmactl;
-	int id, dir = substream->stream;
+	int id;
 	int bitwidth;
 	int ret, dma_port = pcm_data->i2s_port + v->dmactl_audif_start;
 	unsigned int dai_id = cpu_dai->driver->id;
 
-	if (dir ==  SNDRV_PCM_STREAM_PLAYBACK) {
-		id = pcm_data->dma_ch;
-		if (dai_id == LPASS_DP_RX)
-			dmactl = drvdata->hdmi_rd_dmactl;
-		else
-			dmactl = drvdata->rd_dmactl;
-
-	} else {
-		dmactl = drvdata->wr_dmactl;
-		id = pcm_data->dma_ch - v->wrdma_channel_start;
+	__lpass_get_lpaif_handle(substream, component, &dmactl, &id, NULL);
+	if (!dmactl) {
+		dev_err(soc_runtime->dev, "failed to get dmactl handle\n");
+		return -EINVAL;
 	}
 
 	bitwidth = snd_pcm_format_width(format);
@@ -350,10 +387,11 @@ static int lpass_platform_pcmops_hw_free(struct snd_soc_component *component,
 	struct regmap *map;
 	unsigned int dai_id = cpu_dai->driver->id;
 
-	if (dai_id == LPASS_DP_RX)
-		map = drvdata->hdmiif_map;
-	else
-		map = drvdata->lpaif_map;
+	__lpass_get_lpaif_handle(substream, component, NULL, NULL, &map);
+	if (!map) {
+		dev_err(soc_runtime->dev, "failed to get dmactl handle\n");
+		return -EINVAL;
+	}
 
 	reg = LPAIF_DMACTL_REG(v, pcm_data->dma_ch, substream->stream, dai_id);
 	ret = regmap_write(map, reg, 0);
@@ -379,22 +417,12 @@ static int lpass_platform_pcmops_prepare(struct snd_soc_component *component,
 	int ret, id, ch, dir = substream->stream;
 	unsigned int dai_id = cpu_dai->driver->id;
 
-
 	ch = pcm_data->dma_ch;
-	if (dir ==  SNDRV_PCM_STREAM_PLAYBACK) {
-		if (dai_id == LPASS_DP_RX) {
-			dmactl = drvdata->hdmi_rd_dmactl;
-			map = drvdata->hdmiif_map;
-		} else {
-			dmactl = drvdata->rd_dmactl;
-			map = drvdata->lpaif_map;
-		}
 
-		id = pcm_data->dma_ch;
-	} else {
-		dmactl = drvdata->wr_dmactl;
-		id = pcm_data->dma_ch - v->wrdma_channel_start;
-		map = drvdata->lpaif_map;
+	__lpass_get_lpaif_handle(substream, component, &dmactl, &id, &map);
+	if (!dmactl) {
+		dev_err(soc_runtime->dev, "failed to get dmactl handle\n");
+		return -EINVAL;
 	}
 
 	ret = regmap_write(map, LPAIF_DMABASE_REG(v, ch, dir, dai_id),
@@ -444,25 +472,15 @@ static int lpass_platform_pcmops_trigger(struct snd_soc_component *component,
 	struct lpaif_dmactl *dmactl;
 	struct regmap *map;
 	int ret, ch, id;
-	int dir = substream->stream;
 	unsigned int reg_irqclr = 0, val_irqclr = 0;
 	unsigned int  reg_irqen = 0, val_irqen = 0, val_mask = 0;
 	unsigned int dai_id = cpu_dai->driver->id;
 
 	ch = pcm_data->dma_ch;
-	if (dir ==  SNDRV_PCM_STREAM_PLAYBACK) {
-		id = pcm_data->dma_ch;
-		if (dai_id == LPASS_DP_RX) {
-			dmactl = drvdata->hdmi_rd_dmactl;
-			map = drvdata->hdmiif_map;
-		} else {
-			dmactl = drvdata->rd_dmactl;
-			map = drvdata->lpaif_map;
-		}
-	} else {
-		dmactl = drvdata->wr_dmactl;
-		id = pcm_data->dma_ch - v->wrdma_channel_start;
-		map = drvdata->lpaif_map;
+	__lpass_get_lpaif_handle(substream, component, &dmactl, &id, &map);
+	if (!dmactl) {
+		dev_err(soc_runtime->dev, "failed to get dmactl handle\n");
+		return -EINVAL;
 	}
 
 	switch (cmd) {
@@ -597,10 +615,11 @@ static snd_pcm_uframes_t lpass_platform_pcmops_pointer(
 	struct regmap *map;
 	unsigned int dai_id = cpu_dai->driver->id;
 
-	if (dai_id == LPASS_DP_RX)
-		map = drvdata->hdmiif_map;
-	else
-		map = drvdata->lpaif_map;
+	__lpass_get_lpaif_handle(substream, component, NULL, NULL, &map);
+	if (!map) {
+		dev_err(soc_runtime->dev, "failed to get dmactl handle\n");
+		return -EINVAL;
+	}
 
 	ch = pcm_data->dma_ch;
 
-- 
2.7.4