[alsa-devel] [PATCH v8 6/6] drm/bridge: sii902x: Implement HDMI audio support
Jyri Sarha
jsarha at ti.com
Mon May 27 15:47:57 CEST 2019
Implement HDMI audio support by using ASoC HDMI codec. The commit
implements the necessary callbacks and configuration for the HDMI
codec and registers a virtual platform device for the codec to attach.
Signed-off-by: Jyri Sarha <jsarha at ti.com>
Reviewed-by: Andrzej Hajda <a.hajda at samsung.com>
---
drivers/gpu/drm/bridge/sii902x.c | 469 ++++++++++++++++++++++++++++++-
1 file changed, 463 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/bridge/sii902x.c b/drivers/gpu/drm/bridge/sii902x.c
index 19f982a00dba..bc3325c5e5c3 100644
--- a/drivers/gpu/drm/bridge/sii902x.c
+++ b/drivers/gpu/drm/bridge/sii902x.c
@@ -27,6 +27,7 @@
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/regmap.h>
+#include <linux/clk.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_drv.h>
@@ -34,6 +35,8 @@
#include <drm/drm_print.h>
#include <drm/drm_probe_helper.h>
+#include <sound/hdmi-codec.h>
+
#define SII902X_TPI_VIDEO_DATA 0x0
#define SII902X_TPI_PIXEL_REPETITION 0x8
@@ -75,6 +78,77 @@
#define SII902X_AVI_POWER_STATE_MSK GENMASK(1, 0)
#define SII902X_AVI_POWER_STATE_D(l) ((l) & SII902X_AVI_POWER_STATE_MSK)
+/* Audio */
+#define SII902X_TPI_I2S_ENABLE_MAPPING_REG 0x1f
+#define SII902X_TPI_I2S_CONFIG_FIFO0 (0 << 0)
+#define SII902X_TPI_I2S_CONFIG_FIFO1 (1 << 0)
+#define SII902X_TPI_I2S_CONFIG_FIFO2 (2 << 0)
+#define SII902X_TPI_I2S_CONFIG_FIFO3 (3 << 0)
+#define SII902X_TPI_I2S_LEFT_RIGHT_SWAP (1 << 2)
+#define SII902X_TPI_I2S_AUTO_DOWNSAMPLE (1 << 3)
+#define SII902X_TPI_I2S_SELECT_SD0 (0 << 4)
+#define SII902X_TPI_I2S_SELECT_SD1 (1 << 4)
+#define SII902X_TPI_I2S_SELECT_SD2 (2 << 4)
+#define SII902X_TPI_I2S_SELECT_SD3 (3 << 4)
+#define SII902X_TPI_I2S_FIFO_ENABLE (1 << 7)
+
+#define SII902X_TPI_I2S_INPUT_CONFIG_REG 0x20
+#define SII902X_TPI_I2S_FIRST_BIT_SHIFT_YES (0 << 0)
+#define SII902X_TPI_I2S_FIRST_BIT_SHIFT_NO (1 << 0)
+#define SII902X_TPI_I2S_SD_DIRECTION_MSB_FIRST (0 << 1)
+#define SII902X_TPI_I2S_SD_DIRECTION_LSB_FIRST (1 << 1)
+#define SII902X_TPI_I2S_SD_JUSTIFY_LEFT (0 << 2)
+#define SII902X_TPI_I2S_SD_JUSTIFY_RIGHT (1 << 2)
+#define SII902X_TPI_I2S_WS_POLARITY_LOW (0 << 3)
+#define SII902X_TPI_I2S_WS_POLARITY_HIGH (1 << 3)
+#define SII902X_TPI_I2S_MCLK_MULTIPLIER_128 (0 << 4)
+#define SII902X_TPI_I2S_MCLK_MULTIPLIER_256 (1 << 4)
+#define SII902X_TPI_I2S_MCLK_MULTIPLIER_384 (2 << 4)
+#define SII902X_TPI_I2S_MCLK_MULTIPLIER_512 (3 << 4)
+#define SII902X_TPI_I2S_MCLK_MULTIPLIER_768 (4 << 4)
+#define SII902X_TPI_I2S_MCLK_MULTIPLIER_1024 (5 << 4)
+#define SII902X_TPI_I2S_MCLK_MULTIPLIER_1152 (6 << 4)
+#define SII902X_TPI_I2S_MCLK_MULTIPLIER_192 (7 << 4)
+#define SII902X_TPI_I2S_SCK_EDGE_FALLING (0 << 7)
+#define SII902X_TPI_I2S_SCK_EDGE_RISING (1 << 7)
+
+#define SII902X_TPI_I2S_STRM_HDR_BASE 0x21
+#define SII902X_TPI_I2S_STRM_HDR_SIZE 5
+
+#define SII902X_TPI_AUDIO_CONFIG_BYTE2_REG 0x26
+#define SII902X_TPI_AUDIO_CODING_STREAM_HEADER (0 << 0)
+#define SII902X_TPI_AUDIO_CODING_PCM (1 << 0)
+#define SII902X_TPI_AUDIO_CODING_AC3 (2 << 0)
+#define SII902X_TPI_AUDIO_CODING_MPEG1 (3 << 0)
+#define SII902X_TPI_AUDIO_CODING_MP3 (4 << 0)
+#define SII902X_TPI_AUDIO_CODING_MPEG2 (5 << 0)
+#define SII902X_TPI_AUDIO_CODING_AAC (6 << 0)
+#define SII902X_TPI_AUDIO_CODING_DTS (7 << 0)
+#define SII902X_TPI_AUDIO_CODING_ATRAC (8 << 0)
+#define SII902X_TPI_AUDIO_MUTE_DISABLE (0 << 4)
+#define SII902X_TPI_AUDIO_MUTE_ENABLE (1 << 4)
+#define SII902X_TPI_AUDIO_LAYOUT_2_CHANNELS (0 << 5)
+#define SII902X_TPI_AUDIO_LAYOUT_8_CHANNELS (1 << 5)
+#define SII902X_TPI_AUDIO_INTERFACE_DISABLE (0 << 6)
+#define SII902X_TPI_AUDIO_INTERFACE_SPDIF (1 << 6)
+#define SII902X_TPI_AUDIO_INTERFACE_I2S (2 << 6)
+
+#define SII902X_TPI_AUDIO_CONFIG_BYTE3_REG 0x27
+#define SII902X_TPI_AUDIO_FREQ_STREAM (0 << 3)
+#define SII902X_TPI_AUDIO_FREQ_32KHZ (1 << 3)
+#define SII902X_TPI_AUDIO_FREQ_44KHZ (2 << 3)
+#define SII902X_TPI_AUDIO_FREQ_48KHZ (3 << 3)
+#define SII902X_TPI_AUDIO_FREQ_88KHZ (4 << 3)
+#define SII902X_TPI_AUDIO_FREQ_96KHZ (5 << 3)
+#define SII902X_TPI_AUDIO_FREQ_176KHZ (6 << 3)
+#define SII902X_TPI_AUDIO_FREQ_192KHZ (7 << 3)
+#define SII902X_TPI_AUDIO_SAMPLE_SIZE_STREAM (0 << 6)
+#define SII902X_TPI_AUDIO_SAMPLE_SIZE_16 (1 << 6)
+#define SII902X_TPI_AUDIO_SAMPLE_SIZE_20 (2 << 6)
+#define SII902X_TPI_AUDIO_SAMPLE_SIZE_24 (3 << 6)
+
+#define SII902X_TPI_AUDIO_CONFIG_BYTE4_REG 0x28
+
#define SII902X_INT_ENABLE 0x3c
#define SII902X_INT_STATUS 0x3d
#define SII902X_HOTPLUG_EVENT BIT(0)
@@ -82,6 +156,16 @@
#define SII902X_REG_TPI_RQB 0xc7
+/* Indirect internal register access */
+#define SII902X_IND_SET_PAGE 0xbc
+#define SII902X_IND_OFFSET 0xbd
+#define SII902X_IND_VALUE 0xbe
+
+#define SII902X_TPI_MISC_INFOFRAME_BASE 0xbf
+#define SII902X_TPI_MISC_INFOFRAME_END 0xde
+#define SII902X_TPI_MISC_INFOFRAME_SIZE \
+ (SII902X_TPI_MISC_INFOFRAME_END - SII902X_TPI_MISC_INFOFRAME_BASE)
+
#define SII902X_I2C_BUS_ACQUISITION_TIMEOUT_MS 500
struct sii902x {
@@ -91,6 +175,16 @@ struct sii902x {
struct drm_connector connector;
struct gpio_desc *reset_gpio;
struct i2c_mux_core *i2cmux;
+ /*
+ * Mutex protects audio and video functions from interfering
+ * each other, by keeping their i2c command sequences atomic.
+ */
+ struct mutex mutex;
+ struct sii902x_audio {
+ struct platform_device *pdev;
+ struct clk *mclk;
+ u32 i2s_fifo_sequence[4];
+ } audio;
};
static int sii902x_read_unlocked(struct i2c_client *i2c, u8 reg, u8 *val)
@@ -162,8 +256,12 @@ sii902x_connector_detect(struct drm_connector *connector, bool force)
struct sii902x *sii902x = connector_to_sii902x(connector);
unsigned int status;
+ mutex_lock(&sii902x->mutex);
+
regmap_read(sii902x->regmap, SII902X_INT_STATUS, &status);
+ mutex_unlock(&sii902x->mutex);
+
return (status & SII902X_PLUGGED_STATUS) ?
connector_status_connected : connector_status_disconnected;
}
@@ -185,6 +283,8 @@ static int sii902x_get_modes(struct drm_connector *connector)
struct edid *edid;
int num = 0, ret;
+ mutex_lock(&sii902x->mutex);
+
edid = drm_get_edid(connector, sii902x->i2cmux->adapter[0]);
drm_connector_update_edid_property(connector, edid);
if (edid) {
@@ -198,14 +298,19 @@ static int sii902x_get_modes(struct drm_connector *connector)
ret = drm_display_info_set_bus_formats(&connector->display_info,
&bus_format, 1);
if (ret)
- return ret;
+ goto error_out;
ret = regmap_update_bits(sii902x->regmap, SII902X_SYS_CTRL_DATA,
SII902X_SYS_CTRL_OUTPUT_MODE, output_mode);
if (ret)
- return ret;
+ goto error_out;
+
+ ret = num;
+
+error_out:
+ mutex_unlock(&sii902x->mutex);
- return num;
+ return ret;
}
static enum drm_mode_status sii902x_mode_valid(struct drm_connector *connector,
@@ -225,20 +330,28 @@ static void sii902x_bridge_disable(struct drm_bridge *bridge)
{
struct sii902x *sii902x = bridge_to_sii902x(bridge);
+ mutex_lock(&sii902x->mutex);
+
regmap_update_bits(sii902x->regmap, SII902X_SYS_CTRL_DATA,
SII902X_SYS_CTRL_PWR_DWN,
SII902X_SYS_CTRL_PWR_DWN);
+
+ mutex_unlock(&sii902x->mutex);
}
static void sii902x_bridge_enable(struct drm_bridge *bridge)
{
struct sii902x *sii902x = bridge_to_sii902x(bridge);
+ mutex_lock(&sii902x->mutex);
+
regmap_update_bits(sii902x->regmap, SII902X_PWR_STATE_CTRL,
SII902X_AVI_POWER_STATE_MSK,
SII902X_AVI_POWER_STATE_D(0));
regmap_update_bits(sii902x->regmap, SII902X_SYS_CTRL_DATA,
SII902X_SYS_CTRL_PWR_DWN, 0);
+
+ mutex_unlock(&sii902x->mutex);
}
static void sii902x_bridge_mode_set(struct drm_bridge *bridge,
@@ -265,27 +378,32 @@ static void sii902x_bridge_mode_set(struct drm_bridge *bridge,
buf[9] = SII902X_TPI_AVI_INPUT_RANGE_AUTO |
SII902X_TPI_AVI_INPUT_COLORSPACE_RGB;
+ mutex_lock(&sii902x->mutex);
+
ret = regmap_bulk_write(regmap, SII902X_TPI_VIDEO_DATA, buf, 10);
if (ret)
- return;
+ goto out;
ret = drm_hdmi_avi_infoframe_from_display_mode(&frame,
&sii902x->connector, adj);
if (ret < 0) {
DRM_ERROR("couldn't fill AVI infoframe\n");
- return;
+ goto out;
}
ret = hdmi_avi_infoframe_pack(&frame, buf, sizeof(buf));
if (ret < 0) {
DRM_ERROR("failed to pack AVI infoframe: %d\n", ret);
- return;
+ goto out;
}
/* Do not send the infoframe header, but keep the CRC field. */
regmap_bulk_write(regmap, SII902X_TPI_AVI_INFOFRAME,
buf + HDMI_INFOFRAME_HEADER_SIZE - 1,
HDMI_AVI_INFOFRAME_SIZE + 1);
+
+out:
+ mutex_unlock(&sii902x->mutex);
}
static int sii902x_bridge_attach(struct drm_bridge *bridge)
@@ -326,6 +444,335 @@ static const struct drm_bridge_funcs sii902x_bridge_funcs = {
.enable = sii902x_bridge_enable,
};
+static int sii902x_mute(struct sii902x *sii902x, bool mute)
+{
+ struct device *dev = &sii902x->i2c->dev;
+ unsigned int val = mute ? SII902X_TPI_AUDIO_MUTE_ENABLE :
+ SII902X_TPI_AUDIO_MUTE_DISABLE;
+
+ dev_dbg(dev, "%s: %s\n", __func__, mute ? "Muted" : "Unmuted");
+
+ return regmap_update_bits(sii902x->regmap,
+ SII902X_TPI_AUDIO_CONFIG_BYTE2_REG,
+ SII902X_TPI_AUDIO_MUTE_ENABLE, val);
+}
+
+static const int sii902x_mclk_div_table[] = {
+ 128, 256, 384, 512, 768, 1024, 1152, 192 };
+
+static int sii902x_select_mclk_div(u8 *i2s_config_reg, unsigned int rate,
+ unsigned int mclk)
+{
+ int div = mclk / rate;
+ int distance = 100000;
+ u8 i, nearest = 0;
+
+ for (i = 0; i < ARRAY_SIZE(sii902x_mclk_div_table); i++) {
+ unsigned int d = abs(div - sii902x_mclk_div_table[i]);
+
+ if (d >= distance)
+ continue;
+
+ nearest = i;
+ distance = d;
+ if (d == 0)
+ break;
+ }
+
+ *i2s_config_reg |= nearest << 4;
+
+ return sii902x_mclk_div_table[nearest];
+}
+
+static const struct sii902x_sample_freq {
+ u32 freq;
+ u8 val;
+} sii902x_sample_freq[] = {
+ { .freq = 32000, .val = SII902X_TPI_AUDIO_FREQ_32KHZ },
+ { .freq = 44000, .val = SII902X_TPI_AUDIO_FREQ_44KHZ },
+ { .freq = 48000, .val = SII902X_TPI_AUDIO_FREQ_48KHZ },
+ { .freq = 88000, .val = SII902X_TPI_AUDIO_FREQ_88KHZ },
+ { .freq = 96000, .val = SII902X_TPI_AUDIO_FREQ_96KHZ },
+ { .freq = 176000, .val = SII902X_TPI_AUDIO_FREQ_176KHZ },
+ { .freq = 192000, .val = SII902X_TPI_AUDIO_FREQ_192KHZ },
+};
+
+static int sii902x_audio_hw_params(struct device *dev, void *data,
+ struct hdmi_codec_daifmt *daifmt,
+ struct hdmi_codec_params *params)
+{
+ struct sii902x *sii902x = dev_get_drvdata(dev);
+ u8 i2s_config_reg = SII902X_TPI_I2S_SD_DIRECTION_MSB_FIRST;
+ u8 config_byte2_reg = (SII902X_TPI_AUDIO_INTERFACE_I2S |
+ SII902X_TPI_AUDIO_MUTE_ENABLE |
+ SII902X_TPI_AUDIO_CODING_PCM);
+ u8 config_byte3_reg = 0;
+ u8 infoframe_buf[HDMI_INFOFRAME_SIZE(AUDIO)];
+ unsigned long mclk_rate;
+ int i, ret;
+
+ if (daifmt->bit_clk_master || daifmt->frame_clk_master) {
+ dev_dbg(dev, "%s: I2S master mode not supported\n", __func__);
+ return -EINVAL;
+ }
+
+ switch (daifmt->fmt) {
+ case HDMI_I2S:
+ i2s_config_reg |= SII902X_TPI_I2S_FIRST_BIT_SHIFT_YES |
+ SII902X_TPI_I2S_SD_JUSTIFY_LEFT;
+ break;
+ case HDMI_RIGHT_J:
+ i2s_config_reg |= SII902X_TPI_I2S_SD_JUSTIFY_RIGHT;
+ break;
+ case HDMI_LEFT_J:
+ i2s_config_reg |= SII902X_TPI_I2S_SD_JUSTIFY_LEFT;
+ break;
+ default:
+ dev_dbg(dev, "%s: Unsupported i2s format %u\n", __func__,
+ daifmt->fmt);
+ return -EINVAL;
+ }
+
+ if (daifmt->bit_clk_inv)
+ i2s_config_reg |= SII902X_TPI_I2S_SCK_EDGE_FALLING;
+ else
+ i2s_config_reg |= SII902X_TPI_I2S_SCK_EDGE_RISING;
+
+ if (daifmt->frame_clk_inv)
+ i2s_config_reg |= SII902X_TPI_I2S_WS_POLARITY_LOW;
+ else
+ i2s_config_reg |= SII902X_TPI_I2S_WS_POLARITY_HIGH;
+
+ if (params->channels > 2)
+ config_byte2_reg |= SII902X_TPI_AUDIO_LAYOUT_8_CHANNELS;
+ else
+ config_byte2_reg |= SII902X_TPI_AUDIO_LAYOUT_2_CHANNELS;
+
+ switch (params->sample_width) {
+ case 16:
+ config_byte3_reg |= SII902X_TPI_AUDIO_SAMPLE_SIZE_16;
+ break;
+ case 20:
+ config_byte3_reg |= SII902X_TPI_AUDIO_SAMPLE_SIZE_20;
+ break;
+ case 24:
+ case 32:
+ config_byte3_reg |= SII902X_TPI_AUDIO_SAMPLE_SIZE_24;
+ break;
+ default:
+ dev_err(dev, "%s: Unsupported sample width %u\n", __func__,
+ params->sample_width);
+ return -EINVAL;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(sii902x_sample_freq); i++) {
+ if (params->sample_rate == sii902x_sample_freq[i].freq) {
+ config_byte3_reg |= sii902x_sample_freq[i].val;
+ break;
+ }
+ }
+
+ ret = clk_prepare_enable(sii902x->audio.mclk);
+ if (ret) {
+ dev_err(dev, "Enabling mclk failed: %d\n", ret);
+ return ret;
+ }
+
+ mclk_rate = clk_get_rate(sii902x->audio.mclk);
+
+ ret = sii902x_select_mclk_div(&i2s_config_reg, params->sample_rate,
+ mclk_rate);
+ if (mclk_rate != ret * params->sample_rate)
+ dev_dbg(dev, "Inaccurate reference clock (%ld/%d != %u)\n",
+ mclk_rate, ret, params->sample_rate);
+
+ mutex_lock(&sii902x->mutex);
+
+ ret = regmap_write(sii902x->regmap,
+ SII902X_TPI_AUDIO_CONFIG_BYTE2_REG,
+ config_byte2_reg);
+ if (ret < 0)
+ goto out;
+
+ ret = regmap_write(sii902x->regmap, SII902X_TPI_I2S_INPUT_CONFIG_REG,
+ i2s_config_reg);
+ if (ret)
+ goto out;
+
+ for (i = 0; sii902x->audio.i2s_fifo_sequence[i] &&
+ i < ARRAY_SIZE(sii902x->audio.i2s_fifo_sequence); i++)
+ regmap_write(sii902x->regmap,
+ SII902X_TPI_I2S_ENABLE_MAPPING_REG,
+ sii902x->audio.i2s_fifo_sequence[i]);
+
+ ret = regmap_write(sii902x->regmap, SII902X_TPI_AUDIO_CONFIG_BYTE3_REG,
+ config_byte3_reg);
+ if (ret)
+ goto out;
+
+ ret = regmap_bulk_write(sii902x->regmap, SII902X_TPI_I2S_STRM_HDR_BASE,
+ params->iec.status,
+ min((size_t) SII902X_TPI_I2S_STRM_HDR_SIZE,
+ sizeof(params->iec.status)));
+ if (ret)
+ goto out;
+
+ ret = hdmi_audio_infoframe_pack(¶ms->cea, infoframe_buf,
+ sizeof(infoframe_buf));
+ if (ret < 0) {
+ dev_err(dev, "%s: Failed to pack audio infoframe: %d\n",
+ __func__, ret);
+ goto out;
+ }
+
+ ret = regmap_bulk_write(sii902x->regmap,
+ SII902X_TPI_MISC_INFOFRAME_BASE,
+ infoframe_buf,
+ min(ret, SII902X_TPI_MISC_INFOFRAME_SIZE));
+ if (ret)
+ goto out;
+
+ /* Decode Level 0 Packets */
+ ret = regmap_write(sii902x->regmap, SII902X_IND_SET_PAGE, 0x02);
+ if (ret)
+ goto out;
+
+ ret = regmap_write(sii902x->regmap, SII902X_IND_OFFSET, 0x24);
+ if (ret)
+ goto out;
+
+ ret = regmap_write(sii902x->regmap, SII902X_IND_VALUE, 0x02);
+ if (ret)
+ goto out;
+
+ dev_dbg(dev, "%s: hdmi audio enabled\n", __func__);
+out:
+ mutex_unlock(&sii902x->mutex);
+
+ if (ret) {
+ clk_disable_unprepare(sii902x->audio.mclk);
+ dev_err(dev, "%s: hdmi audio enable failed: %d\n", __func__,
+ ret);
+ }
+
+ return ret;
+}
+
+static void sii902x_audio_shutdown(struct device *dev, void *data)
+{
+ struct sii902x *sii902x = dev_get_drvdata(dev);
+
+ mutex_lock(&sii902x->mutex);
+
+ regmap_write(sii902x->regmap, SII902X_TPI_AUDIO_CONFIG_BYTE2_REG,
+ SII902X_TPI_AUDIO_INTERFACE_DISABLE);
+
+ mutex_unlock(&sii902x->mutex);
+
+ clk_disable_unprepare(sii902x->audio.mclk);
+}
+
+int sii902x_audio_digital_mute(struct device *dev, void *data, bool enable)
+{
+ struct sii902x *sii902x = dev_get_drvdata(dev);
+
+ mutex_lock(&sii902x->mutex);
+
+ sii902x_mute(sii902x, enable);
+
+ mutex_unlock(&sii902x->mutex);
+
+ return 0;
+}
+
+static int sii902x_audio_get_eld(struct device *dev, void *data,
+ uint8_t *buf, size_t len)
+{
+ struct sii902x *sii902x = dev_get_drvdata(dev);
+
+ mutex_lock(&sii902x->mutex);
+
+ memcpy(buf, sii902x->connector.eld,
+ min(sizeof(sii902x->connector.eld), len));
+
+ mutex_unlock(&sii902x->mutex);
+
+ return 0;
+}
+
+static const struct hdmi_codec_ops sii902x_audio_codec_ops = {
+ .hw_params = sii902x_audio_hw_params,
+ .audio_shutdown = sii902x_audio_shutdown,
+ .digital_mute = sii902x_audio_digital_mute,
+ .get_eld = sii902x_audio_get_eld,
+};
+
+static int sii902x_audio_codec_init(struct sii902x *sii902x,
+ struct device *dev)
+{
+ static const u8 audio_fifo_id[] = {
+ SII902X_TPI_I2S_CONFIG_FIFO0,
+ SII902X_TPI_I2S_CONFIG_FIFO1,
+ SII902X_TPI_I2S_CONFIG_FIFO2,
+ SII902X_TPI_I2S_CONFIG_FIFO3,
+ };
+ static const u8 i2s_lane_id[] = {
+ SII902X_TPI_I2S_SELECT_SD0,
+ SII902X_TPI_I2S_SELECT_SD1,
+ SII902X_TPI_I2S_SELECT_SD2,
+ SII902X_TPI_I2S_SELECT_SD3,
+ };
+ struct hdmi_codec_pdata codec_data = {
+ .ops = &sii902x_audio_codec_ops,
+ .i2s = 1, /* Only i2s support for now. */
+ .spdif = 0,
+ .max_i2s_channels = 0,
+ };
+ u8 lanes[4];
+ u32 num_lanes, i;
+
+ if (!of_property_read_bool(dev->of_node, "#sound-dai-cells")) {
+ dev_dbg(dev, "%s: No \"#sound-dai-cells\", no audio\n",
+ __func__);
+ return 0;
+ }
+
+ num_lanes = of_property_read_variable_u8_array(dev->of_node,
+ "sil,i2s-data-lanes",
+ lanes, 1,
+ ARRAY_SIZE(lanes));
+
+ if (num_lanes == -EINVAL) {
+ dev_dbg(dev,
+ "%s: No \"sil,i2s-data-lanes\", use default <0>\n",
+ __func__);
+ num_lanes = 1;
+ lanes[0] = 0;
+ } else if (num_lanes < 0) {
+ dev_err(dev,
+ "%s: Error gettin \"sil,i2s-data-lanes\": %d\n",
+ __func__, num_lanes);
+ return num_lanes;
+ }
+ codec_data.max_i2s_channels = 2 * num_lanes;
+
+ for (i = 0; i < num_lanes; i++)
+ sii902x->audio.i2s_fifo_sequence[i] |= audio_fifo_id[i] |
+ i2s_lane_id[lanes[i]] | SII902X_TPI_I2S_FIFO_ENABLE;
+
+ if (IS_ERR(sii902x->audio.mclk)) {
+ dev_err(dev, "%s: No clock (audio mclk) found: %ld\n",
+ __func__, PTR_ERR(sii902x->audio.mclk));
+ return 0;
+ }
+
+ sii902x->audio.pdev = platform_device_register_data(
+ dev, HDMI_CODEC_DRV_NAME, PLATFORM_DEVID_AUTO,
+ &codec_data, sizeof(codec_data));
+
+ return PTR_ERR_OR_ZERO(sii902x->audio.pdev);
+}
+
static const struct regmap_range sii902x_volatile_ranges[] = {
{ .range_min = 0, .range_max = 0xff },
};
@@ -338,6 +785,8 @@ static const struct regmap_access_table sii902x_volatile_table = {
static const struct regmap_config sii902x_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
+ .disable_locking = true, /* struct sii902x mutex should be enough */
+ .max_register = SII902X_TPI_MISC_INFOFRAME_END,
.volatile_table = &sii902x_volatile_table,
.cache_type = REGCACHE_NONE,
};
@@ -347,9 +796,13 @@ static irqreturn_t sii902x_interrupt(int irq, void *data)
struct sii902x *sii902x = data;
unsigned int status = 0;
+ mutex_lock(&sii902x->mutex);
+
regmap_read(sii902x->regmap, SII902X_INT_STATUS, &status);
regmap_write(sii902x->regmap, SII902X_INT_STATUS, status);
+ mutex_unlock(&sii902x->mutex);
+
if ((status & SII902X_HOTPLUG_EVENT) && sii902x->bridge.dev)
drm_helper_hpd_irq_event(sii902x->bridge.dev);
@@ -510,6 +963,8 @@ static int sii902x_probe(struct i2c_client *client,
return PTR_ERR(sii902x->reset_gpio);
}
+ mutex_init(&sii902x->mutex);
+
sii902x_reset(sii902x);
ret = regmap_write(sii902x->regmap, SII902X_REG_TPI_RQB, 0x0);
@@ -550,6 +1005,8 @@ static int sii902x_probe(struct i2c_client *client,
sii902x->bridge.timings = &default_sii902x_timings;
drm_bridge_add(&sii902x->bridge);
+ sii902x_audio_codec_init(sii902x, dev);
+
i2c_set_clientdata(client, sii902x);
sii902x->i2cmux = i2c_mux_alloc(client->adapter, dev,
--
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