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- // SPDX-License-Identifier: GPL-2.0-or-later
- /*
- * Copyright (C) 2018 Renesas Electronics
- *
- * Copyright (C) 2016 Atmel
- * Bo Shen <voice.shen@atmel.com>
- *
- * Authors: Bo Shen <voice.shen@atmel.com>
- * Boris Brezillon <boris.brezillon@free-electrons.com>
- * Wu, Songjun <Songjun.Wu@atmel.com>
- *
- * Copyright (C) 2010-2011 Freescale Semiconductor, Inc. All Rights Reserved.
- */
- #include <linux/gpio/consumer.h>
- #include <linux/i2c-mux.h>
- #include <linux/i2c.h>
- #include <linux/module.h>
- #include <linux/regmap.h>
- #include <linux/regulator/consumer.h>
- #include <linux/clk.h>
- #include <drm/drm_atomic_helper.h>
- #include <drm/drm_bridge.h>
- #include <drm/drm_drv.h>
- #include <drm/drm_edid.h>
- #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
- #define SII902X_TPI_AVI_PIXEL_REP_BUS_24BIT BIT(5)
- #define SII902X_TPI_AVI_PIXEL_REP_RISING_EDGE BIT(4)
- #define SII902X_TPI_AVI_PIXEL_REP_4X 3
- #define SII902X_TPI_AVI_PIXEL_REP_2X 1
- #define SII902X_TPI_AVI_PIXEL_REP_NONE 0
- #define SII902X_TPI_CLK_RATIO_HALF (0 << 6)
- #define SII902X_TPI_CLK_RATIO_1X (1 << 6)
- #define SII902X_TPI_CLK_RATIO_2X (2 << 6)
- #define SII902X_TPI_CLK_RATIO_4X (3 << 6)
- #define SII902X_TPI_AVI_IN_FORMAT 0x9
- #define SII902X_TPI_AVI_INPUT_BITMODE_12BIT BIT(7)
- #define SII902X_TPI_AVI_INPUT_DITHER BIT(6)
- #define SII902X_TPI_AVI_INPUT_RANGE_LIMITED (2 << 2)
- #define SII902X_TPI_AVI_INPUT_RANGE_FULL (1 << 2)
- #define SII902X_TPI_AVI_INPUT_RANGE_AUTO (0 << 2)
- #define SII902X_TPI_AVI_INPUT_COLORSPACE_BLACK (3 << 0)
- #define SII902X_TPI_AVI_INPUT_COLORSPACE_YUV422 (2 << 0)
- #define SII902X_TPI_AVI_INPUT_COLORSPACE_YUV444 (1 << 0)
- #define SII902X_TPI_AVI_INPUT_COLORSPACE_RGB (0 << 0)
- #define SII902X_TPI_AVI_INFOFRAME 0x0c
- #define SII902X_SYS_CTRL_DATA 0x1a
- #define SII902X_SYS_CTRL_PWR_DWN BIT(4)
- #define SII902X_SYS_CTRL_AV_MUTE BIT(3)
- #define SII902X_SYS_CTRL_DDC_BUS_REQ BIT(2)
- #define SII902X_SYS_CTRL_DDC_BUS_GRTD BIT(1)
- #define SII902X_SYS_CTRL_OUTPUT_MODE BIT(0)
- #define SII902X_SYS_CTRL_OUTPUT_HDMI 1
- #define SII902X_SYS_CTRL_OUTPUT_DVI 0
- #define SII902X_REG_CHIPID(n) (0x1b + (n))
- #define SII902X_PWR_STATE_CTRL 0x1e
- #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)
- #define SII902X_PLUGGED_STATUS BIT(2)
- #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
- #define SII902X_AUDIO_PORT_INDEX 3
- struct sii902x {
- struct i2c_client *i2c;
- struct regmap *regmap;
- struct drm_bridge bridge;
- struct drm_connector connector;
- struct gpio_desc *reset_gpio;
- struct i2c_mux_core *i2cmux;
- struct regulator_bulk_data supplies[2];
- /*
- * 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)
- {
- union i2c_smbus_data data;
- int ret;
- ret = __i2c_smbus_xfer(i2c->adapter, i2c->addr, i2c->flags,
- I2C_SMBUS_READ, reg, I2C_SMBUS_BYTE_DATA, &data);
- if (ret < 0)
- return ret;
- *val = data.byte;
- return 0;
- }
- static int sii902x_write_unlocked(struct i2c_client *i2c, u8 reg, u8 val)
- {
- union i2c_smbus_data data;
- data.byte = val;
- return __i2c_smbus_xfer(i2c->adapter, i2c->addr, i2c->flags,
- I2C_SMBUS_WRITE, reg, I2C_SMBUS_BYTE_DATA,
- &data);
- }
- static int sii902x_update_bits_unlocked(struct i2c_client *i2c, u8 reg, u8 mask,
- u8 val)
- {
- int ret;
- u8 status;
- ret = sii902x_read_unlocked(i2c, reg, &status);
- if (ret)
- return ret;
- status &= ~mask;
- status |= val & mask;
- return sii902x_write_unlocked(i2c, reg, status);
- }
- static inline struct sii902x *bridge_to_sii902x(struct drm_bridge *bridge)
- {
- return container_of(bridge, struct sii902x, bridge);
- }
- static inline struct sii902x *connector_to_sii902x(struct drm_connector *con)
- {
- return container_of(con, struct sii902x, connector);
- }
- static void sii902x_reset(struct sii902x *sii902x)
- {
- if (!sii902x->reset_gpio)
- return;
- gpiod_set_value(sii902x->reset_gpio, 1);
- /* The datasheet says treset-min = 100us. Make it 150us to be sure. */
- usleep_range(150, 200);
- gpiod_set_value(sii902x->reset_gpio, 0);
- }
- static enum drm_connector_status
- 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;
- }
- static const struct drm_connector_funcs sii902x_connector_funcs = {
- .detect = sii902x_connector_detect,
- .fill_modes = drm_helper_probe_single_connector_modes,
- .destroy = drm_connector_cleanup,
- .reset = drm_atomic_helper_connector_reset,
- .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
- .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
- };
- static int sii902x_get_modes(struct drm_connector *connector)
- {
- struct sii902x *sii902x = connector_to_sii902x(connector);
- u32 bus_format = MEDIA_BUS_FMT_RGB888_1X24;
- u8 output_mode = SII902X_SYS_CTRL_OUTPUT_DVI;
- 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) {
- if (drm_detect_hdmi_monitor(edid))
- output_mode = SII902X_SYS_CTRL_OUTPUT_HDMI;
- num = drm_add_edid_modes(connector, edid);
- kfree(edid);
- }
- ret = drm_display_info_set_bus_formats(&connector->display_info,
- &bus_format, 1);
- if (ret)
- goto error_out;
- ret = regmap_update_bits(sii902x->regmap, SII902X_SYS_CTRL_DATA,
- SII902X_SYS_CTRL_OUTPUT_MODE, output_mode);
- if (ret)
- goto error_out;
- ret = num;
- error_out:
- mutex_unlock(&sii902x->mutex);
- return ret;
- }
- static enum drm_mode_status sii902x_mode_valid(struct drm_connector *connector,
- struct drm_display_mode *mode)
- {
- /* TODO: check mode */
- return MODE_OK;
- }
- static const struct drm_connector_helper_funcs sii902x_connector_helper_funcs = {
- .get_modes = sii902x_get_modes,
- .mode_valid = sii902x_mode_valid,
- };
- 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,
- const struct drm_display_mode *mode,
- const struct drm_display_mode *adj)
- {
- struct sii902x *sii902x = bridge_to_sii902x(bridge);
- struct regmap *regmap = sii902x->regmap;
- u8 buf[HDMI_INFOFRAME_SIZE(AVI)];
- struct hdmi_avi_infoframe frame;
- u16 pixel_clock_10kHz = adj->clock / 10;
- int ret;
- buf[0] = pixel_clock_10kHz & 0xff;
- buf[1] = pixel_clock_10kHz >> 8;
- buf[2] = drm_mode_vrefresh(adj);
- buf[3] = 0x00;
- buf[4] = adj->hdisplay;
- buf[5] = adj->hdisplay >> 8;
- buf[6] = adj->vdisplay;
- buf[7] = adj->vdisplay >> 8;
- buf[8] = SII902X_TPI_CLK_RATIO_1X | SII902X_TPI_AVI_PIXEL_REP_NONE |
- SII902X_TPI_AVI_PIXEL_REP_BUS_24BIT;
- 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)
- 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");
- goto out;
- }
- ret = hdmi_avi_infoframe_pack(&frame, buf, sizeof(buf));
- if (ret < 0) {
- DRM_ERROR("failed to pack AVI infoframe: %d\n", ret);
- 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,
- enum drm_bridge_attach_flags flags)
- {
- struct sii902x *sii902x = bridge_to_sii902x(bridge);
- struct drm_device *drm = bridge->dev;
- int ret;
- if (flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR) {
- DRM_ERROR("Fix bridge driver to make connector optional!");
- return -EINVAL;
- }
- drm_connector_helper_add(&sii902x->connector,
- &sii902x_connector_helper_funcs);
- if (!drm_core_check_feature(drm, DRIVER_ATOMIC)) {
- dev_err(&sii902x->i2c->dev,
- "sii902x driver is only compatible with DRM devices supporting atomic updates\n");
- return -ENOTSUPP;
- }
- ret = drm_connector_init(drm, &sii902x->connector,
- &sii902x_connector_funcs,
- DRM_MODE_CONNECTOR_HDMIA);
- if (ret)
- return ret;
- if (sii902x->i2c->irq > 0)
- sii902x->connector.polled = DRM_CONNECTOR_POLL_HPD;
- else
- sii902x->connector.polled = DRM_CONNECTOR_POLL_CONNECT;
- drm_connector_attach_encoder(&sii902x->connector, bridge->encoder);
- return 0;
- }
- static const struct drm_bridge_funcs sii902x_bridge_funcs = {
- .attach = sii902x_bridge_attach,
- .mode_set = sii902x_bridge_mode_set,
- .disable = sii902x_bridge_disable,
- .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;
- }
- if (sii902x->audio.mclk) {
- 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; i < ARRAY_SIZE(sii902x->audio.i2s_fifo_sequence) &&
- sii902x->audio.i2s_fifo_sequence[i]; 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);
- }
- static int sii902x_audio_mute(struct device *dev, void *data,
- bool enable, int direction)
- {
- 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 int sii902x_audio_get_dai_id(struct snd_soc_component *component,
- struct device_node *endpoint)
- {
- struct of_endpoint of_ep;
- int ret;
- ret = of_graph_parse_endpoint(endpoint, &of_ep);
- if (ret < 0)
- return ret;
- /*
- * HDMI sound should be located at reg = <3>
- * Return expected DAI index 0.
- */
- if (of_ep.port == SII902X_AUDIO_PORT_INDEX)
- return 0;
- return -EINVAL;
- }
- static const struct hdmi_codec_ops sii902x_audio_codec_ops = {
- .hw_params = sii902x_audio_hw_params,
- .audio_shutdown = sii902x_audio_shutdown,
- .mute_stream = sii902x_audio_mute,
- .get_eld = sii902x_audio_get_eld,
- .get_dai_id = sii902x_audio_get_dai_id,
- .no_capture_mute = 1,
- };
- 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];
- int 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;
- sii902x->audio.mclk = devm_clk_get_optional(dev, "mclk");
- if (IS_ERR(sii902x->audio.mclk)) {
- dev_err(dev, "%s: No clock (audio mclk) found: %ld\n",
- __func__, PTR_ERR(sii902x->audio.mclk));
- return PTR_ERR(sii902x->audio.mclk);
- }
- 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 },
- };
- static const struct regmap_access_table sii902x_volatile_table = {
- .yes_ranges = sii902x_volatile_ranges,
- .n_yes_ranges = ARRAY_SIZE(sii902x_volatile_ranges),
- };
- 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,
- };
- 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);
- return IRQ_HANDLED;
- }
- /*
- * The purpose of sii902x_i2c_bypass_select is to enable the pass through
- * mode of the HDMI transmitter. Do not use regmap from within this function,
- * only use sii902x_*_unlocked functions to read/modify/write registers.
- * We are holding the parent adapter lock here, keep this in mind before
- * adding more i2c transactions.
- *
- * Also, since SII902X_SYS_CTRL_DATA is used with regmap_update_bits elsewhere
- * in this driver, we need to make sure that we only touch 0x1A[2:1] from
- * within sii902x_i2c_bypass_select and sii902x_i2c_bypass_deselect, and that
- * we leave the remaining bits as we have found them.
- */
- static int sii902x_i2c_bypass_select(struct i2c_mux_core *mux, u32 chan_id)
- {
- struct sii902x *sii902x = i2c_mux_priv(mux);
- struct device *dev = &sii902x->i2c->dev;
- unsigned long timeout;
- u8 status;
- int ret;
- ret = sii902x_update_bits_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
- SII902X_SYS_CTRL_DDC_BUS_REQ,
- SII902X_SYS_CTRL_DDC_BUS_REQ);
- if (ret)
- return ret;
- timeout = jiffies +
- msecs_to_jiffies(SII902X_I2C_BUS_ACQUISITION_TIMEOUT_MS);
- do {
- ret = sii902x_read_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
- &status);
- if (ret)
- return ret;
- } while (!(status & SII902X_SYS_CTRL_DDC_BUS_GRTD) &&
- time_before(jiffies, timeout));
- if (!(status & SII902X_SYS_CTRL_DDC_BUS_GRTD)) {
- dev_err(dev, "Failed to acquire the i2c bus\n");
- return -ETIMEDOUT;
- }
- return sii902x_write_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
- status);
- }
- /*
- * The purpose of sii902x_i2c_bypass_deselect is to disable the pass through
- * mode of the HDMI transmitter. Do not use regmap from within this function,
- * only use sii902x_*_unlocked functions to read/modify/write registers.
- * We are holding the parent adapter lock here, keep this in mind before
- * adding more i2c transactions.
- *
- * Also, since SII902X_SYS_CTRL_DATA is used with regmap_update_bits elsewhere
- * in this driver, we need to make sure that we only touch 0x1A[2:1] from
- * within sii902x_i2c_bypass_select and sii902x_i2c_bypass_deselect, and that
- * we leave the remaining bits as we have found them.
- */
- static int sii902x_i2c_bypass_deselect(struct i2c_mux_core *mux, u32 chan_id)
- {
- struct sii902x *sii902x = i2c_mux_priv(mux);
- struct device *dev = &sii902x->i2c->dev;
- unsigned long timeout;
- unsigned int retries;
- u8 status;
- int ret;
- /*
- * When the HDMI transmitter is in pass through mode, we need an
- * (undocumented) additional delay between STOP and START conditions
- * to guarantee the bus won't get stuck.
- */
- udelay(30);
- /*
- * Sometimes the I2C bus can stall after failure to use the
- * EDID channel. Retry a few times to see if things clear
- * up, else continue anyway.
- */
- retries = 5;
- do {
- ret = sii902x_read_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
- &status);
- retries--;
- } while (ret && retries);
- if (ret) {
- dev_err(dev, "failed to read status (%d)\n", ret);
- return ret;
- }
- ret = sii902x_update_bits_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
- SII902X_SYS_CTRL_DDC_BUS_REQ |
- SII902X_SYS_CTRL_DDC_BUS_GRTD, 0);
- if (ret)
- return ret;
- timeout = jiffies +
- msecs_to_jiffies(SII902X_I2C_BUS_ACQUISITION_TIMEOUT_MS);
- do {
- ret = sii902x_read_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
- &status);
- if (ret)
- return ret;
- } while (status & (SII902X_SYS_CTRL_DDC_BUS_REQ |
- SII902X_SYS_CTRL_DDC_BUS_GRTD) &&
- time_before(jiffies, timeout));
- if (status & (SII902X_SYS_CTRL_DDC_BUS_REQ |
- SII902X_SYS_CTRL_DDC_BUS_GRTD)) {
- dev_err(dev, "failed to release the i2c bus\n");
- return -ETIMEDOUT;
- }
- return 0;
- }
- static const struct drm_bridge_timings default_sii902x_timings = {
- .input_bus_flags = DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE
- | DRM_BUS_FLAG_SYNC_SAMPLE_NEGEDGE
- | DRM_BUS_FLAG_DE_HIGH,
- };
- static int sii902x_init(struct sii902x *sii902x)
- {
- struct device *dev = &sii902x->i2c->dev;
- unsigned int status = 0;
- u8 chipid[4];
- int ret;
- sii902x_reset(sii902x);
- ret = regmap_write(sii902x->regmap, SII902X_REG_TPI_RQB, 0x0);
- if (ret)
- return ret;
- ret = regmap_bulk_read(sii902x->regmap, SII902X_REG_CHIPID(0),
- &chipid, 4);
- if (ret) {
- dev_err(dev, "regmap_read failed %d\n", ret);
- return ret;
- }
- if (chipid[0] != 0xb0) {
- dev_err(dev, "Invalid chipid: %02x (expecting 0xb0)\n",
- chipid[0]);
- return -EINVAL;
- }
- /* Clear all pending interrupts */
- regmap_read(sii902x->regmap, SII902X_INT_STATUS, &status);
- regmap_write(sii902x->regmap, SII902X_INT_STATUS, status);
- if (sii902x->i2c->irq > 0) {
- regmap_write(sii902x->regmap, SII902X_INT_ENABLE,
- SII902X_HOTPLUG_EVENT);
- ret = devm_request_threaded_irq(dev, sii902x->i2c->irq, NULL,
- sii902x_interrupt,
- IRQF_ONESHOT, dev_name(dev),
- sii902x);
- if (ret)
- return ret;
- }
- sii902x->bridge.funcs = &sii902x_bridge_funcs;
- sii902x->bridge.of_node = dev->of_node;
- sii902x->bridge.timings = &default_sii902x_timings;
- drm_bridge_add(&sii902x->bridge);
- sii902x_audio_codec_init(sii902x, dev);
- i2c_set_clientdata(sii902x->i2c, sii902x);
- sii902x->i2cmux = i2c_mux_alloc(sii902x->i2c->adapter, dev,
- 1, 0, I2C_MUX_GATE,
- sii902x_i2c_bypass_select,
- sii902x_i2c_bypass_deselect);
- if (!sii902x->i2cmux)
- return -ENOMEM;
- sii902x->i2cmux->priv = sii902x;
- return i2c_mux_add_adapter(sii902x->i2cmux, 0, 0, 0);
- }
- static int sii902x_probe(struct i2c_client *client,
- const struct i2c_device_id *id)
- {
- struct device *dev = &client->dev;
- struct sii902x *sii902x;
- int ret;
- ret = i2c_check_functionality(client->adapter,
- I2C_FUNC_SMBUS_BYTE_DATA);
- if (!ret) {
- dev_err(dev, "I2C adapter not suitable\n");
- return -EIO;
- }
- sii902x = devm_kzalloc(dev, sizeof(*sii902x), GFP_KERNEL);
- if (!sii902x)
- return -ENOMEM;
- sii902x->i2c = client;
- sii902x->regmap = devm_regmap_init_i2c(client, &sii902x_regmap_config);
- if (IS_ERR(sii902x->regmap))
- return PTR_ERR(sii902x->regmap);
- sii902x->reset_gpio = devm_gpiod_get_optional(dev, "reset",
- GPIOD_OUT_LOW);
- if (IS_ERR(sii902x->reset_gpio)) {
- dev_err(dev, "Failed to retrieve/request reset gpio: %ld\n",
- PTR_ERR(sii902x->reset_gpio));
- return PTR_ERR(sii902x->reset_gpio);
- }
- mutex_init(&sii902x->mutex);
- sii902x->supplies[0].supply = "iovcc";
- sii902x->supplies[1].supply = "cvcc12";
- ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(sii902x->supplies),
- sii902x->supplies);
- if (ret < 0)
- return ret;
- ret = regulator_bulk_enable(ARRAY_SIZE(sii902x->supplies),
- sii902x->supplies);
- if (ret < 0) {
- dev_err_probe(dev, ret, "Failed to enable supplies");
- return ret;
- }
- ret = sii902x_init(sii902x);
- if (ret < 0) {
- regulator_bulk_disable(ARRAY_SIZE(sii902x->supplies),
- sii902x->supplies);
- }
- return ret;
- }
- static int sii902x_remove(struct i2c_client *client)
- {
- struct sii902x *sii902x = i2c_get_clientdata(client);
- i2c_mux_del_adapters(sii902x->i2cmux);
- drm_bridge_remove(&sii902x->bridge);
- regulator_bulk_disable(ARRAY_SIZE(sii902x->supplies),
- sii902x->supplies);
- return 0;
- }
- static const struct of_device_id sii902x_dt_ids[] = {
- { .compatible = "sil,sii9022", },
- { }
- };
- MODULE_DEVICE_TABLE(of, sii902x_dt_ids);
- static const struct i2c_device_id sii902x_i2c_ids[] = {
- { "sii9022", 0 },
- { },
- };
- MODULE_DEVICE_TABLE(i2c, sii902x_i2c_ids);
- static struct i2c_driver sii902x_driver = {
- .probe = sii902x_probe,
- .remove = sii902x_remove,
- .driver = {
- .name = "sii902x",
- .of_match_table = sii902x_dt_ids,
- },
- .id_table = sii902x_i2c_ids,
- };
- module_i2c_driver(sii902x_driver);
- MODULE_AUTHOR("Boris Brezillon <boris.brezillon@free-electrons.com>");
- MODULE_DESCRIPTION("SII902x RGB -> HDMI bridges");
- MODULE_LICENSE("GPL");
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