[PATCH v3 4/5] ASoC: qcom: Add support for audio over DP

From: Srinivasa Rao Mandadapu
Date: Mon Aug 31 2020 - 02:40:32 EST

From: V Sujith Kumar Reddy <vsujithk@xxxxxxxxxxxxxx>

Add support for audio playback over DP in lpass sc7180 platform driver.
Add lpass_variant structure for hdmi data configuaration.

Signed-off-by: Srinivasa Rao <srivasam@xxxxxxxxxxxxxx>
Signed-off-by: V Sujith Kumar Reddy <vsujithk@xxxxxxxxxxxxxx>
---
sound/soc/qcom/lpass-sc7180.c | 121 +++++++++++++++++++++++++++++++++++++++++-
1 file changed, 120 insertions(+), 1 deletion(-)

diff --git a/sound/soc/qcom/lpass-sc7180.c b/sound/soc/qcom/lpass-sc7180.c
index 167bf2c..cea7ae7 100644
--- a/sound/soc/qcom/lpass-sc7180.c
+++ b/sound/soc/qcom/lpass-sc7180.c
@@ -62,6 +62,24 @@ static struct snd_soc_dai_driver sc7180_lpass_cpu_dai_driver[] = {
},
};

+static struct snd_soc_dai_driver sc7180_lpass_cpu_hdmi_dai_driver[] = {
+ [0] = {
+ .id = HDMI,
+ .name = "Hdmi",
+ .playback = {
+ .stream_name = "Hdmi Playback",
+ .formats = SNDRV_PCM_FMTBIT_S24_3LE |
+ SNDRV_PCM_FMTBIT_S24_LE,
+ .rates = SNDRV_PCM_RATE_48000,
+ .rate_min = 48000,
+ .rate_max = 48000,
+ .channels_min = 2,
+ .channels_max = 2,
+ },
+ .ops = &asoc_qcom_lpass_hdmi_dai_ops,
+ },
+};
+
static int sc7180_lpass_alloc_dma_channel(struct lpass_data *drvdata,
int direction)
{
@@ -88,13 +106,37 @@ static int sc7180_lpass_alloc_dma_channel(struct lpass_data *drvdata,

return chan;
}
+static int sc7180_lpass_alloc_hdmi_dma_channel(struct lpass_data *drvdata,
+ int direction)
+{
+ struct lpass_variant *v = drvdata->variant;
+ int chan = 0;
+
+ if (direction == SNDRV_PCM_STREAM_PLAYBACK) {
+ chan = find_first_zero_bit(&drvdata->dma_ch_bit_map,
+ v->rdma_channels);
+
+ if (chan >= v->rdma_channels)
+ return -EBUSY;
+ }
+ set_bit(chan, &drvdata->dma_ch_bit_map);
+
+ return chan;

+}
static int sc7180_lpass_free_dma_channel(struct lpass_data *drvdata, int chan)
{
clear_bit(chan, &drvdata->dma_ch_bit_map);

return 0;
}
+static int sc7180_lpass_free_hdmi_dma_channel(struct lpass_data *drvdata, int chan)
+{
+ clear_bit(chan, &drvdata->dma_ch_bit_map);
+
+ return 0;
+}
+

static int sc7180_lpass_init(struct platform_device *pdev)
{
@@ -190,15 +232,92 @@ static struct lpass_variant sc7180_data = {
"mi2s-bit-clk0",
"mi2s-bit-clk1",
},
+ .id = I2S_INTERFACE,
.init = sc7180_lpass_init,
.exit = sc7180_lpass_exit,
.alloc_dma_channel = sc7180_lpass_alloc_dma_channel,
.free_dma_channel = sc7180_lpass_free_dma_channel,
};

+static struct lpass_variant sc7180_hdmi_data = {
+ .hdmi_tx_ctl_addr = 0x1000,
+ .hdmi_legacy_addr = 0x1008,
+ .hdmi_vbit_addr = 0x610c0,
+ .hdmi_ch_lsb_addr = 0x61048,
+ .hdmi_ch_msb_addr = 0x6104c,
+ .ch_stride = 0x8,
+ .hdmi_parity_addr = 0x61034,
+ .hdmi_dmactl_addr = 0x61038,
+ .hdmi_dma_stride = 0x4,
+ .hdmi_DP_addr = 0x610c8,
+ .hdmi_sstream_addr = 0x6101c,
+ .irq_reg_base = 0x63000,
+ .irq_ports = 1,
+ .rdma_reg_base = 0x64000,
+ .rdma_reg_stride = 0x1000,
+ .rdma_channels = 4,
+
+ .rdma_dyncclk = REG_FIELD_ID(0x64000, 14, 14, 4, 0x1000),
+ .rdma_bursten = REG_FIELD_ID(0x64000, 13, 13, 4, 0x1000),
+ .rdma_burst8 = REG_FIELD_ID(0x64000, 15, 15, 4, 0x1000),
+ .rdma_burst16 = REG_FIELD_ID(0x64000, 16, 16, 4, 0x1000),
+ .rdma_dynburst = REG_FIELD_ID(0x64000, 18, 18, 4, 0x1000),
+ .rdma_wpscnt = REG_FIELD_ID(0x64000, 10, 12, 4, 0x1000),
+ .rdma_fifowm = REG_FIELD_ID(0x64000, 1, 5, 4, 0x1000),
+ .rdma_enable = REG_FIELD_ID(0x64000, 0, 0, 4, 0x1000),
+
+ .sstream_en = REG_FIELD(0x6101c, 0, 0),
+ .dma_sel = REG_FIELD(0x6101c, 1, 2),
+ .auto_bbit_en = REG_FIELD(0x6101c, 3, 3),
+ .layout = REG_FIELD(0x6101c, 4, 4),
+ .layout_sp = REG_FIELD(0x6101c, 5, 8),
+ .set_sp_on_en = REG_FIELD(0x6101c, 10, 10),
+ .dp_audio = REG_FIELD(0x6101c, 11, 11),
+ .dp_staffing_en = REG_FIELD(0x6101c, 12, 12),
+ .dp_sp_b_hw_en = REG_FIELD(0x6101c, 13, 13),
+
+ .mute = REG_FIELD(0x610c8, 0, 0),
+ .as_sdp_cc = REG_FIELD(0x610c8, 1, 3),
+ .as_sdp_ct = REG_FIELD(0x610c8, 4, 7),
+ .aif_db4 = REG_FIELD(0x610c8, 8, 15),
+ .frequency = REG_FIELD(0x610c8, 16, 21),
+ .mst_index = REG_FIELD(0x610c8, 28, 29),
+ .dptx_index = REG_FIELD(0x610c8, 30, 31),
+
+ .soft_reset = REG_FIELD(0x1000, 31, 31),
+ .force_reset = REG_FIELD(0x1000, 30, 30),
+
+ .use_hw_chs = REG_FIELD(0x61038, 0, 0),
+ .use_hw_usr = REG_FIELD(0x61038, 1, 1),
+ .hw_chs_sel = REG_FIELD(0x61038, 2, 4),
+ .hw_usr_sel = REG_FIELD(0x61038, 5, 6),
+
+ .replace_vbit = REG_FIELD(0x610c0, 0, 0),
+ .vbit_stream = REG_FIELD(0x610c0, 1, 1),
+
+ .legacy_en = REG_FIELD(0x1008, 0, 0),
+ .calc_en = REG_FIELD(0x61034, 0, 0),
+ .lsb_bits = REG_FIELD(0x61048, 0, 31),
+ .msb_bits = REG_FIELD(0x6104c, 0, 31),
+
+ .clk_name = (const char*[]) {
+ "pcnoc-sway-clk",
+ "audio-core",
+ "pcnoc-mport-clk",
+ },
+ .num_clks = 3,
+ .id = HDMI_INTERFACE,
+ .dai_driver = sc7180_lpass_cpu_hdmi_dai_driver,
+ .num_dai = ARRAY_SIZE(sc7180_lpass_cpu_hdmi_dai_driver),
+ .init = sc7180_lpass_init,
+ .exit = sc7180_lpass_exit,
+ .alloc_dma_channel = sc7180_lpass_alloc_hdmi_dma_channel,
+ .free_dma_channel = sc7180_lpass_free_hdmi_dma_channel,
+
+};
static const struct of_device_id sc7180_lpass_cpu_device_id[] = {
{.compatible = "qcom,sc7180-lpass-cpu", .data = &sc7180_data},
- {}
+ {.compatible = "qcom,sc7180-lpass-hdmi", .data = &sc7180_hdmi_data}
};

static struct platform_driver sc7180_lpass_cpu_platform_driver = {
--
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