[PATCH 7/7] ASoC: fsl_sai: Configure dataline/FIFO information from dts property
Shengjiu Wang
shengjiu.wang at nxp.com
Tue Jun 14 06:11:24 CEST 2022
The SAI has multiple successive FIFO registers, but in some use
case the required dataline/FIFOs are not successive, so need
get such information from dts property "fsl,dataline"
fsl,dataline has 3 values for each configuration:
first one means the type: I2S(1) or DSD(2),
second one is dataline mask for 'rx',
third one is dataline mask for 'tx'.
Also set dma peripheral address and TRCE bits according to data lane.
Signed-off-by: Shengjiu Wang <shengjiu.wang at nxp.com>
Signed-off-by: Viorel Suman <viorel.suman at nxp.com>
---
sound/soc/fsl/fsl_sai.c | 161 +++++++++++++++++++++++++++++++++++++++-
sound/soc/fsl/fsl_sai.h | 17 +++++
2 files changed, 174 insertions(+), 4 deletions(-)
diff --git a/sound/soc/fsl/fsl_sai.c b/sound/soc/fsl/fsl_sai.c
index 86aa0baba848..f5eabb0b10e8 100644
--- a/sound/soc/fsl/fsl_sai.c
+++ b/sound/soc/fsl/fsl_sai.c
@@ -487,13 +487,18 @@ static int fsl_sai_hw_params(struct snd_pcm_substream *substream,
unsigned int ofs = sai->soc_data->reg_offset;
bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
unsigned int channels = params_channels(params);
+ struct snd_dmaengine_dai_dma_data *dma_params;
+ struct fsl_sai_dl_cfg *dl_cfg = sai->dl_cfg;
u32 word_width = params_width(params);
+ int trce_mask = 0, dl_cfg_idx = 0;
+ int dl_cfg_cnt = sai->dl_cfg_cnt;
+ u32 dl_type = FSL_SAI_DL_I2S;
u32 val_cr4 = 0, val_cr5 = 0;
u32 slots = (channels == 1) ? 2 : channels;
u32 slot_width = word_width;
int adir = tx ? RX : TX;
u32 pins, bclk;
- int ret;
+ int ret, i;
if (sai->slots)
slots = sai->slots;
@@ -507,8 +512,22 @@ static int fsl_sai_hw_params(struct snd_pcm_substream *substream,
* PDM mode, channels are independent
* each channels are on one dataline/FIFO.
*/
- if (sai->is_pdm_mode)
+ if (sai->is_pdm_mode) {
pins = channels;
+ dl_type = FSL_SAI_DL_PDM;
+ }
+
+ for (i = 0; i < dl_cfg_cnt; i++) {
+ if (dl_cfg[i].type == dl_type && dl_cfg[i].pins[tx] == pins) {
+ dl_cfg_idx = i;
+ break;
+ }
+ }
+
+ if (hweight8(dl_cfg[dl_cfg_idx].mask[tx]) < pins) {
+ dev_err(cpu_dai->dev, "channel not supported\n");
+ return -EINVAL;
+ }
bclk = params_rate(params) * (sai->bclk_ratio ? sai->bclk_ratio : slots * slot_width);
@@ -571,13 +590,28 @@ static int fsl_sai_hw_params(struct snd_pcm_substream *substream,
FSL_SAI_CR5_FBT_MASK, val_cr5);
}
- if (sai->soc_data->pins > 1)
+ if (hweight8(dl_cfg[dl_cfg_idx].mask[tx]) <= 1)
+ regmap_update_bits(sai->regmap, FSL_SAI_xCR4(tx, ofs),
+ FSL_SAI_CR4_FCOMB_MASK, 0);
+ else
regmap_update_bits(sai->regmap, FSL_SAI_xCR4(tx, ofs),
FSL_SAI_CR4_FCOMB_MASK, FSL_SAI_CR4_FCOMB_SOFT);
+ dma_params = tx ? &sai->dma_params_tx : &sai->dma_params_rx;
+ dma_params->addr = sai->res->start + FSL_SAI_xDR0(tx) +
+ dl_cfg[dl_cfg_idx].start_off[tx] * 0x4;
+
+ /* Find a proper tcre setting */
+ for (i = 0; i < sai->soc_data->pins; i++) {
+ trce_mask = (1 << (i + 1)) - 1;
+ if (hweight8(dl_cfg[dl_cfg_idx].mask[tx] & trce_mask) == pins)
+ break;
+ }
+
regmap_update_bits(sai->regmap, FSL_SAI_xCR3(tx, ofs),
FSL_SAI_CR3_TRCE_MASK,
- FSL_SAI_CR3_TRCE((1 << pins) - 1));
+ FSL_SAI_CR3_TRCE((dl_cfg[dl_cfg_idx].mask[tx] & trce_mask)));
+
regmap_update_bits(sai->regmap, FSL_SAI_xCR4(tx, ofs),
FSL_SAI_CR4_SYWD_MASK | FSL_SAI_CR4_FRSZ_MASK |
FSL_SAI_CR4_CHMOD_MASK,
@@ -1068,6 +1102,118 @@ static int fsl_sai_check_version(struct device *dev)
return 0;
}
+/*
+ * Calculate the offset between first two datalines, don't
+ * different offset in one case.
+ */
+static unsigned int fsl_sai_calc_dl_off(unsigned long dl_mask)
+{
+ int fbidx, nbidx, offset;
+
+ fbidx = find_first_bit(&dl_mask, FSL_SAI_DL_NUM);
+ nbidx = find_next_bit(&dl_mask, FSL_SAI_DL_NUM, fbidx + 1);
+ offset = nbidx - fbidx - 1;
+
+ return (offset < 0 || offset >= (FSL_SAI_DL_NUM - 1) ? 0 : offset);
+}
+
+/*
+ * read the fsl,dataline property from dts file.
+ * It has 3 value for each configuration, first one means the type:
+ * I2S(1) or PDM(2), second one is dataline mask for 'rx', third one is
+ * dataline mask for 'tx'. for example
+ *
+ * fsl,dataline = <1 0xff 0xff 2 0xff 0x11>,
+ *
+ * It means I2S type rx mask is 0xff, tx mask is 0xff, PDM type
+ * rx mask is 0xff, tx mask is 0x11 (dataline 1 and 4 enabled).
+ *
+ */
+static int fsl_sai_read_dlcfg(struct fsl_sai *sai)
+{
+ struct platform_device *pdev = sai->pdev;
+ struct device_node *np = pdev->dev.of_node;
+ struct device *dev = &pdev->dev;
+ int ret, elems, i, index, num_cfg;
+ char *propname = "fsl,dataline";
+ struct fsl_sai_dl_cfg *cfg;
+ unsigned long dl_mask;
+ unsigned int soc_dl;
+ u32 rx, tx, type;
+
+ elems = of_property_count_u32_elems(np, propname);
+
+ if (elems <= 0) {
+ elems = 0;
+ } else if (elems % 3) {
+ dev_err(dev, "Number of elements must be divisible to 3.\n");
+ return -EINVAL;
+ }
+
+ num_cfg = elems / 3;
+ /* Add one more for default value */
+ cfg = devm_kzalloc(&pdev->dev, (num_cfg + 1) * sizeof(*cfg), GFP_KERNEL);
+ if (!cfg)
+ return -ENOMEM;
+
+ /* Consider default value "0 0xFF 0xFF" if property is missing */
+ soc_dl = BIT(sai->soc_data->pins) - 1;
+ cfg[0].type = FSL_SAI_DL_DEFAULT;
+ cfg[0].pins[0] = sai->soc_data->pins;
+ cfg[0].mask[0] = soc_dl;
+ cfg[0].start_off[0] = 0;
+ cfg[0].next_off[0] = 0;
+
+ cfg[0].pins[1] = sai->soc_data->pins;
+ cfg[0].mask[1] = soc_dl;
+ cfg[0].start_off[1] = 0;
+ cfg[0].next_off[1] = 0;
+ for (i = 1, index = 0; i < num_cfg + 1; i++) {
+ /*
+ * type of dataline
+ * 0 means default mode
+ * 1 means I2S mode
+ * 2 means PDM mode
+ */
+ ret = of_property_read_u32_index(np, propname, index++, &type);
+ if (ret)
+ return -EINVAL;
+
+ ret = of_property_read_u32_index(np, propname, index++, &rx);
+ if (ret)
+ return -EINVAL;
+
+ ret = of_property_read_u32_index(np, propname, index++, &tx);
+ if (ret)
+ return -EINVAL;
+
+ if ((rx & ~soc_dl) || (tx & ~soc_dl)) {
+ dev_err(dev, "dataline cfg[%d] setting error, mask is 0x%x\n", i, soc_dl);
+ return -EINVAL;
+ }
+
+ rx = rx & soc_dl;
+ tx = tx & soc_dl;
+
+ cfg[i].type = type;
+ cfg[i].pins[0] = hweight8(rx);
+ cfg[i].mask[0] = rx;
+ dl_mask = rx;
+ cfg[i].start_off[0] = find_first_bit(&dl_mask, FSL_SAI_DL_NUM);
+ cfg[i].next_off[0] = fsl_sai_calc_dl_off(rx);
+
+ cfg[i].pins[1] = hweight8(tx);
+ cfg[i].mask[1] = tx;
+ dl_mask = tx;
+ cfg[i].start_off[1] = find_first_bit(&dl_mask, FSL_SAI_DL_NUM);
+ cfg[i].next_off[1] = fsl_sai_calc_dl_off(tx);
+ }
+
+ sai->dl_cfg = cfg;
+ sai->dl_cfg_cnt = num_cfg + 1;
+ return 0;
+}
+
static int fsl_sai_runtime_suspend(struct device *dev);
static int fsl_sai_runtime_resume(struct device *dev);
@@ -1134,6 +1280,13 @@ static int fsl_sai_probe(struct platform_device *pdev)
else
sai->mclk_clk[0] = sai->bus_clk;
+ /* read dataline mask for rx and tx*/
+ ret = fsl_sai_read_dlcfg(sai);
+ if (ret < 0) {
+ dev_err(dev, "failed to read dlcfg %d\n", ret);
+ return ret;
+ }
+
irq = platform_get_irq(pdev, 0);
if (irq < 0)
return irq;
diff --git a/sound/soc/fsl/fsl_sai.h b/sound/soc/fsl/fsl_sai.h
index 4d657edc9c9f..9bb8ced520c8 100644
--- a/sound/soc/fsl/fsl_sai.h
+++ b/sound/soc/fsl/fsl_sai.h
@@ -218,6 +218,13 @@
#define PMQOS_CPU_LATENCY BIT(0)
+/* Max number of dataline */
+#define FSL_SAI_DL_NUM (8)
+/* default dataline type is zero */
+#define FSL_SAI_DL_DEFAULT (0)
+#define FSL_SAI_DL_I2S BIT(0)
+#define FSL_SAI_DL_PDM BIT(1)
+
struct fsl_sai_soc_data {
bool use_imx_pcm;
bool use_edma;
@@ -253,6 +260,14 @@ struct fsl_sai_param {
u32 dataline;
};
+struct fsl_sai_dl_cfg {
+ unsigned int type;
+ unsigned int pins[2];
+ unsigned int mask[2];
+ unsigned int start_off[2];
+ unsigned int next_off[2];
+};
+
struct fsl_sai {
struct platform_device *pdev;
struct regmap *regmap;
@@ -265,6 +280,8 @@ struct fsl_sai {
bool is_dsp_mode;
bool is_pdm_mode;
bool synchronous[2];
+ struct fsl_sai_dl_cfg *dl_cfg;
+ unsigned int dl_cfg_cnt;
unsigned int mclk_id[2];
unsigned int mclk_streams;
--
2.17.1
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