diff options
Diffstat (limited to 'target/linux/at91/patches-5.10/152-ASoC-mchp-i2s-mcc-Add-support-to-select-TDM-pins.patch')
| -rw-r--r-- | target/linux/at91/patches-5.10/152-ASoC-mchp-i2s-mcc-Add-support-to-select-TDM-pins.patch | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/target/linux/at91/patches-5.10/152-ASoC-mchp-i2s-mcc-Add-support-to-select-TDM-pins.patch b/target/linux/at91/patches-5.10/152-ASoC-mchp-i2s-mcc-Add-support-to-select-TDM-pins.patch new file mode 100644 index 0000000000..b4f1635e68 --- /dev/null +++ b/target/linux/at91/patches-5.10/152-ASoC-mchp-i2s-mcc-Add-support-to-select-TDM-pins.patch @@ -0,0 +1,113 @@ +From 2bbdc5b38603384996271a8817b0578a2360af2f Mon Sep 17 00:00:00 2001 +From: Codrin Ciubotariu <codrin.ciubotariu@microchip.com> +Date: Mon, 1 Mar 2021 19:09:03 +0200 +Subject: [PATCH 152/247] ASoC: mchp-i2s-mcc: Add support to select TDM pins + +SAMA7G5's I2S-MCC has 4 pairs of DIN/DOUT pins. Since TDM only uses a +single pair of pins for synchronous capture and playback, the controller +needs to be told which of the pair is connected. This can be mentioned +using the "microchip,tdm-data-pair" property from DT. The property is +optional, useful only if TDM is used. If it's missing, DIN/DOUT 0 pins +will be used by default. + +Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com> +Link: https://lore.kernel.org/r/20210301170905.835091-6-codrin.ciubotariu@microchip.com +Signed-off-by: Mark Brown <broonie@kernel.org> +--- + sound/soc/atmel/mchp-i2s-mcc.c | 52 +++++++++++++++++++++++++++++++--- + 1 file changed, 48 insertions(+), 4 deletions(-) + +diff --git a/sound/soc/atmel/mchp-i2s-mcc.c b/sound/soc/atmel/mchp-i2s-mcc.c +index dca4fd1e2dfd..0818fa864f0e 100644 +--- a/sound/soc/atmel/mchp-i2s-mcc.c ++++ b/sound/soc/atmel/mchp-i2s-mcc.c +@@ -100,6 +100,8 @@ + #define MCHP_I2SMCC_MRA_DATALENGTH_8_BITS_COMPACT (7 << 1) + + #define MCHP_I2SMCC_MRA_WIRECFG_MASK GENMASK(5, 4) ++#define MCHP_I2SMCC_MRA_WIRECFG_TDM(pin) (((pin) << 4) & \ ++ MCHP_I2SMCC_MRA_WIRECFG_MASK) + #define MCHP_I2SMCC_MRA_WIRECFG_I2S_1_TDM_0 (0 << 4) + #define MCHP_I2SMCC_MRA_WIRECFG_I2S_2_TDM_1 (1 << 4) + #define MCHP_I2SMCC_MRA_WIRECFG_I2S_4_TDM_2 (2 << 4) +@@ -245,6 +247,7 @@ struct mchp_i2s_mcc_dev { + unsigned int frame_length; + int tdm_slots; + int channels; ++ u8 tdm_data_pair; + unsigned int gclk_use:1; + unsigned int gclk_running:1; + unsigned int tx_rdy:1; +@@ -589,6 +592,8 @@ static int mchp_i2s_mcc_hw_params(struct snd_pcm_substream *substream, + if (!frame_length) + frame_length = 2 * params_physical_width(params); + } else if (dev->fmt & SND_SOC_DAIFMT_DSP_A) { ++ mra |= MCHP_I2SMCC_MRA_WIRECFG_TDM(dev->tdm_data_pair); ++ + if (dev->tdm_slots) { + if (channels % 2 && channels * 2 <= dev->tdm_slots) { + /* +@@ -914,6 +919,45 @@ static const struct of_device_id mchp_i2s_mcc_dt_ids[] = { + MODULE_DEVICE_TABLE(of, mchp_i2s_mcc_dt_ids); + #endif + ++static int mchp_i2s_mcc_soc_data_parse(struct platform_device *pdev, ++ struct mchp_i2s_mcc_dev *dev) ++{ ++ int err; ++ ++ if (!dev->soc) { ++ dev_err(&pdev->dev, "failed to get soc data\n"); ++ return -ENODEV; ++ } ++ ++ if (dev->soc->data_pin_pair_num == 1) ++ return 0; ++ ++ err = of_property_read_u8(pdev->dev.of_node, "microchip,tdm-data-pair", ++ &dev->tdm_data_pair); ++ if (err < 0 && err != -EINVAL) { ++ dev_err(&pdev->dev, ++ "bad property data for 'microchip,tdm-data-pair': %d", ++ err); ++ return err; ++ } ++ if (err == -EINVAL) { ++ dev_info(&pdev->dev, ++ "'microchip,tdm-data-pair' not found; assuming DIN/DOUT 0 for TDM\n"); ++ dev->tdm_data_pair = 0; ++ } else { ++ if (dev->tdm_data_pair > dev->soc->data_pin_pair_num - 1) { ++ dev_err(&pdev->dev, ++ "invalid value for 'microchip,tdm-data-pair': %d\n", ++ dev->tdm_data_pair); ++ return -EINVAL; ++ } ++ dev_dbg(&pdev->dev, "TMD format on DIN/DOUT %d pins\n", ++ dev->tdm_data_pair); ++ } ++ ++ return 0; ++} ++ + static int mchp_i2s_mcc_probe(struct platform_device *pdev) + { + struct mchp_i2s_mcc_dev *dev; +@@ -966,10 +1010,10 @@ static int mchp_i2s_mcc_probe(struct platform_device *pdev) + } + + dev->soc = of_device_get_match_data(&pdev->dev); +- if (!dev->soc) { +- dev_err(&pdev->dev, "failed to get soc data\n"); +- return -ENODEV; +- } ++ err = mchp_i2s_mcc_soc_data_parse(pdev, dev); ++ if (err < 0) ++ return err; ++ + dev->dev = &pdev->dev; + dev->regmap = regmap; + platform_set_drvdata(pdev, dev); +-- +2.32.0 + |