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109 lines
3.5 KiB
Diff
109 lines
3.5 KiB
Diff
From 2bbdc5b38603384996271a8817b0578a2360af2f Mon Sep 17 00:00:00 2001
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From: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
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Date: Mon, 1 Mar 2021 19:09:03 +0200
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Subject: [PATCH 152/247] ASoC: mchp-i2s-mcc: Add support to select TDM pins
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SAMA7G5's I2S-MCC has 4 pairs of DIN/DOUT pins. Since TDM only uses a
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single pair of pins for synchronous capture and playback, the controller
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needs to be told which of the pair is connected. This can be mentioned
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using the "microchip,tdm-data-pair" property from DT. The property is
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optional, useful only if TDM is used. If it's missing, DIN/DOUT 0 pins
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will be used by default.
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Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
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Link: https://lore.kernel.org/r/20210301170905.835091-6-codrin.ciubotariu@microchip.com
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Signed-off-by: Mark Brown <broonie@kernel.org>
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---
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sound/soc/atmel/mchp-i2s-mcc.c | 52 +++++++++++++++++++++++++++++++---
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1 file changed, 48 insertions(+), 4 deletions(-)
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--- a/sound/soc/atmel/mchp-i2s-mcc.c
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+++ b/sound/soc/atmel/mchp-i2s-mcc.c
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@@ -100,6 +100,8 @@
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#define MCHP_I2SMCC_MRA_DATALENGTH_8_BITS_COMPACT (7 << 1)
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#define MCHP_I2SMCC_MRA_WIRECFG_MASK GENMASK(5, 4)
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+#define MCHP_I2SMCC_MRA_WIRECFG_TDM(pin) (((pin) << 4) & \
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+ MCHP_I2SMCC_MRA_WIRECFG_MASK)
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#define MCHP_I2SMCC_MRA_WIRECFG_I2S_1_TDM_0 (0 << 4)
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#define MCHP_I2SMCC_MRA_WIRECFG_I2S_2_TDM_1 (1 << 4)
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#define MCHP_I2SMCC_MRA_WIRECFG_I2S_4_TDM_2 (2 << 4)
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@@ -245,6 +247,7 @@ struct mchp_i2s_mcc_dev {
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unsigned int frame_length;
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int tdm_slots;
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int channels;
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+ u8 tdm_data_pair;
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unsigned int gclk_use:1;
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unsigned int gclk_running:1;
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unsigned int tx_rdy:1;
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@@ -589,6 +592,8 @@ static int mchp_i2s_mcc_hw_params(struct
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if (!frame_length)
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frame_length = 2 * params_physical_width(params);
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} else if (dev->fmt & SND_SOC_DAIFMT_DSP_A) {
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+ mra |= MCHP_I2SMCC_MRA_WIRECFG_TDM(dev->tdm_data_pair);
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+
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if (dev->tdm_slots) {
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if (channels % 2 && channels * 2 <= dev->tdm_slots) {
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/*
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@@ -914,6 +919,45 @@ static const struct of_device_id mchp_i2
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MODULE_DEVICE_TABLE(of, mchp_i2s_mcc_dt_ids);
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#endif
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+static int mchp_i2s_mcc_soc_data_parse(struct platform_device *pdev,
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+ struct mchp_i2s_mcc_dev *dev)
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+{
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+ int err;
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+
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+ if (!dev->soc) {
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+ dev_err(&pdev->dev, "failed to get soc data\n");
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+ return -ENODEV;
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+ }
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+
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+ if (dev->soc->data_pin_pair_num == 1)
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+ return 0;
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+
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+ err = of_property_read_u8(pdev->dev.of_node, "microchip,tdm-data-pair",
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+ &dev->tdm_data_pair);
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+ if (err < 0 && err != -EINVAL) {
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+ dev_err(&pdev->dev,
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+ "bad property data for 'microchip,tdm-data-pair': %d",
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+ err);
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+ return err;
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+ }
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+ if (err == -EINVAL) {
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+ dev_info(&pdev->dev,
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+ "'microchip,tdm-data-pair' not found; assuming DIN/DOUT 0 for TDM\n");
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+ dev->tdm_data_pair = 0;
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+ } else {
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+ if (dev->tdm_data_pair > dev->soc->data_pin_pair_num - 1) {
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+ dev_err(&pdev->dev,
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+ "invalid value for 'microchip,tdm-data-pair': %d\n",
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+ dev->tdm_data_pair);
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+ return -EINVAL;
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+ }
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+ dev_dbg(&pdev->dev, "TMD format on DIN/DOUT %d pins\n",
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+ dev->tdm_data_pair);
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+ }
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+
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+ return 0;
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+}
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+
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static int mchp_i2s_mcc_probe(struct platform_device *pdev)
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{
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struct mchp_i2s_mcc_dev *dev;
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@@ -966,10 +1010,10 @@ static int mchp_i2s_mcc_probe(struct pla
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}
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dev->soc = of_device_get_match_data(&pdev->dev);
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- if (!dev->soc) {
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- dev_err(&pdev->dev, "failed to get soc data\n");
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- return -ENODEV;
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- }
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+ err = mchp_i2s_mcc_soc_data_parse(pdev, dev);
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+ if (err < 0)
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+ return err;
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+
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dev->dev = &pdev->dev;
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dev->regmap = regmap;
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platform_set_drvdata(pdev, dev);
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