The following changes are included:
- Updated Kconfig and Makefile to include the new driver
- Implementation of the bridge driver at
drivers/gpu/drm/bridge/lontium-lt9611c.c
Signed-off-by: syyang <syy...@lontium.com>
---
drivers/gpu/drm/bridge/Kconfig | 16 +
drivers/gpu/drm/bridge/Makefile | 1 +
drivers/gpu/drm/bridge/lontium-lt9611c.c | 1496 ++++++++++++++++++++++
3 files changed, 1513 insertions(+)
create mode 100644 drivers/gpu/drm/bridge/lontium-lt9611c.c
diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig
index b9e0ca85226a..f0df146ed2ce 100644
--- a/drivers/gpu/drm/bridge/Kconfig
+++ b/drivers/gpu/drm/bridge/Kconfig
@@ -170,6 +170,22 @@ config DRM_LONTIUM_LT9611
HDMI signals
Please say Y if you have such hardware.
+config DRM_LONTIUM_LT9611C
+ tristate "Lontium LT9611C DSI/HDMI bridge"
+ select SND_SOC_HDMI_CODEC if SND_SOC
+ depends on OF
+ select DRM_PANEL_BRIDGE
+ select DRM_KMS_HELPER
+ select DRM_MIPI_DSI
+ select DRM_DISPLAY_HELPER
+ select DRM_DISPLAY_HDMI_STATE_HELPER
+ select REGMAP_I2C
+ help
+ Driver for Lontium LT9611C DSI to HDMI bridge
+ chip driver that converts dual DSI and I2S to
+ HDMI signals
+ Please say Y if you have such hardware.
+
config DRM_LONTIUM_LT9611UXC
tristate "Lontium LT9611UXC DSI/HDMI bridge"
select SND_SOC_HDMI_CODEC if SND_SOC
diff --git a/drivers/gpu/drm/bridge/Makefile b/drivers/gpu/drm/bridge/Makefile
index 245e8a27e3fc..ccfa9987aa4f 100644
--- a/drivers/gpu/drm/bridge/Makefile
+++ b/drivers/gpu/drm/bridge/Makefile
@@ -15,6 +15,7 @@ obj-$(CONFIG_DRM_ITE_IT6505) += ite-it6505.o
obj-$(CONFIG_DRM_LONTIUM_LT8912B) += lontium-lt8912b.o
obj-$(CONFIG_DRM_LONTIUM_LT9211) += lontium-lt9211.o
obj-$(CONFIG_DRM_LONTIUM_LT9611) += lontium-lt9611.o
+obj-$(CONFIG_DRM_LONTIUM_LT9611C) += lontium-lt9611c.o
obj-$(CONFIG_DRM_LONTIUM_LT9611UXC) += lontium-lt9611uxc.o
obj-$(CONFIG_DRM_LVDS_CODEC) += lvds-codec.o
obj-$(CONFIG_DRM_MEGACHIPS_STDPXXXX_GE_B850V3_FW) +=
megachips-stdpxxxx-ge-b850v3-fw.o
diff --git a/drivers/gpu/drm/bridge/lontium-lt9611c.c
b/drivers/gpu/drm/bridge/lontium-lt9611c.c
new file mode 100644
index 000000000000..c4d680362583
--- /dev/null
+++ b/drivers/gpu/drm/bridge/lontium-lt9611c.c
@@ -0,0 +1,1496 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright 2025 LONTIUM
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ */
+#include <linux/firmware.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/of_graph.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <drm/drm_modes.h>
+#include <sound/hdmi-codec.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_edid.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_of.h>
+#include <drm/drm_print.h>
+#include <drm/drm_probe_helper.h>
+#include <linux/pm_runtime.h>
+
+#define FW_SIZE (64 * 1024)
+#define LT_PAGE_SIZE 256
+#define FW_FILE "LT9611C.bin"
+#define NOT_UPGRADE 0
+#define UPGRADE 1
+
+struct lt9611c {
+ struct device *dev;
+ struct i2c_client *client;
+ struct drm_bridge bridge;
+ struct drm_bridge *next_bridge;
+ struct regmap *regmap;
+ /* Protects all accesses to registers by stopping the on-chip MCU */
+ struct mutex ocm_lock;
+ struct work_struct work;
+ struct device_node *dsi0_node;
+ struct device_node *dsi1_node;
+ struct mipi_dsi_device *dsi0;
+ struct mipi_dsi_device *dsi1;
+ struct platform_device *audio_pdev;
+ struct gpio_desc *reset_gpio;
+ struct regulator_bulk_data supplies[2];
+ struct device *codec_dev;
+ struct task_struct *kthread;
+ struct task_struct *test_kthread;
+ hdmi_codec_plugged_cb plugged_cb;
+ const struct firmware *fw;
+ u64 fw_version;
+ u8 *edid_buf;
+ int edid_len;
+ bool edid_valid;
+ u8 fw_crc;
+
+ bool work_inited;
+ bool bridge_added;
+ bool regulators_enabled;
+ bool hdmi_connected;
+ enum drm_connector_status audio_status;
+};
+
+static const struct regmap_range chip_ranges[] = {
+ { .range_min = 0, .range_max = 0xff },
+};
+
+static const struct regmap_access_table chip_table = {
+ .yes_ranges = chip_ranges,
+ .n_yes_ranges = ARRAY_SIZE(chip_ranges),
+};
+
+static const struct regmap_config lt9611c_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .volatile_table = &chip_table,
+ .cache_type = REGCACHE_NONE,
+};
+
+struct crc_info {
+ u8 width;
+ u32 poly;
+ u32 crc_init;
+ u32 xor_out;
+ bool refin;
+ bool refout;
+};
+
+static void lt9611c_audio_update_connector_status(struct lt9611c *lt9611c);
+
+static unsigned int bits_reverse(u32 in_val, u8 bits)
+{
+ u32 out_val = 0;
+ u8 i;
+
+ for (i = 0; i < bits; i++) {
+ if (in_val & (1 << i))
+ out_val |= 1 << (bits - 1 - i);
+ }
+
+ return out_val;
+}
+
+static unsigned int get_crc(struct crc_info type, const u8 *buf, u64 buf_len)
+{
+ u8 width = type.width;
+ u32 poly = type.poly;
+ u32 crc = type.crc_init;
+ u32 xorout = type.xor_out;
+ bool refin = type.refin;
+ bool refout = type.refout;
+ u8 n;
+ u32 bits;
+ u32 data;
+ u8 i;
+
+ n = (width < 8) ? 0 : (width - 8);
+ crc = (width < 8) ? (crc << (8 - width)) : crc;
+ bits = (width < 8) ? 0x80 : (1 << (width - 1));
+ poly = (width < 8) ? (poly << (8 - width)) : poly;
+ while (buf_len--) {
+ data = *(buf++);
+ if (refin)
+ data = bits_reverse(data, 8);
+ crc ^= (data << n);
+ for (i = 0; i < 8; i++) {
+ if (crc & bits)
+ crc = (crc << 1) ^ poly;
+ else
+ crc = crc << 1;
+ }
+ }
+ crc = (width < 8) ? (crc >> (8 - width)) : crc;
+ if (refout)
+ crc = bits_reverse(crc, width);
+ crc ^= xorout;
+
+ return (crc & ((2 << (width - 1)) - 1));
+}
+
+static u8 calculate_crc(struct lt9611c *lt9611c)
+{
+ struct crc_info type = {
+ .width = 8,
+ .poly = 0x31,
+ .crc_init = 0,
+ .xor_out = 0,
+ .refout = false,
+ .refin = false,
+ };
+ const u8 *upgrade_data;
+ u64 len;
+ u64 crc_size = FW_SIZE - 1;
+ u8 default_val = 0xFF;
+
+ if (!lt9611c->fw || !lt9611c->fw->data || lt9611c->fw->size == 0) {
+ dev_err(lt9611c->dev, "firmware data not available for CRC\n");
+ return 0;
+ }
+
+ upgrade_data = lt9611c->fw->data;
+ len = lt9611c->fw->size;
+
+ type.crc_init = get_crc(type, upgrade_data, len);
+
+ crc_size -= len;
+ while (crc_size--)
+ type.crc_init = get_crc(type, &default_val, 1);
+
+ return type.crc_init;
+}
+
+static int i2c_write_byte(struct lt9611c *lt9611c, u8 reg, u8 val)
+{
+ struct device *dev = lt9611c->dev;
+ int ret = 0;
+
+ ret = regmap_write(lt9611c->regmap, reg, val);
+ if (ret < 0) {
+ dev_err(dev,
+ "regmap_write error: i2c addr=0x%02x, reg addr=0x%02x,
error=%d",
+ lt9611c->client->addr, reg, ret);
+ }
+
+ return ret;
+}
+
+static int i2c_read_byte(struct lt9611c *lt9611c, u8 reg, u8 *val)
+{
+ struct device *dev = lt9611c->dev;
+ int ret = 0;
+ unsigned int tmp;
+
+ if (!val)
+ return -EINVAL;
+
+ ret = regmap_read(lt9611c->regmap, reg, &tmp);
+ if (ret < 0) {
+ dev_err(dev,
+ "regmap_read error: i2c addr=0x%02x, reg addr=0x%02x,
error=%d",
+ lt9611c->client->addr, reg, ret);
+
+ return ret;
+ }
+
+ *val = (u8)tmp;
+
+ return 0;
+}
+
+static int i2c_read_write_flow(struct lt9611c *lt9611c, u8 *params,
+ unsigned int param_count, u8 *return_buffer,
+ unsigned int return_count)
+{
+ int count, i;
+ u8 temp;
+
+ i2c_write_byte(lt9611c, 0xFF, 0xE0);
+ i2c_write_byte(lt9611c, 0xDE, 0x01);
+
+ count = 0;
+ do {
+ i2c_read_byte(lt9611c, 0xAE, &temp);
+ usleep_range(1000, 2000);
+ count++;
+ } while (count < 100 && temp != 0x01);
+
+ if (temp != 0x01)
+ return -1;
+
+ for (i = 0; i < param_count; i++) {
+ if (i > 0xDD - 0xB0)
+ break;
+
+ i2c_write_byte(lt9611c, 0xB0 + i, params[i]);
+ }
+
+ i2c_write_byte(lt9611c, 0xDE, 0x02);
+
+ count = 0;
+ do {
+ i2c_read_byte(lt9611c, 0xAE, &temp);
+ usleep_range(1000, 2000);
+ count++;
+ } while (count < 100 && temp != 0x02);
+
+ if (temp != 0x02)
+ return -2;
+
+ for (i = 0; i < return_count; i++)
+ i2c_read_byte(lt9611c, 0x85 + i, &return_buffer[i]);
+
+ return 0;
+}
+
+static int lt9611c_prepare_firmware_data(struct lt9611c *lt9611c)
+{
+ struct device *dev = lt9611c->dev;
+ int ret;
+
+ /* ensure filesystem ready */
+ msleep(3000);
+ ret = request_firmware(<9611c->fw, FW_FILE, dev);
+ if (ret) {
+ dev_err(dev, "failed load file '%s', error type %d\n", FW_FILE,
ret);
+ return ret;
+ }
+
+ if (lt9611c->fw->size > FW_SIZE - 1) {
+ dev_err(dev, "firmware too large (%zu > %d)\n",
lt9611c->fw->size, FW_SIZE - 1);
+ lt9611c->fw = NULL;
+ return -EINVAL;
+ }
+
+ dev_info(dev, "firmware size: %zu bytes\n", lt9611c->fw->size);
+
+ lt9611c->fw_crc = calculate_crc(lt9611c);
+
+ dev_info(dev, "LT9611C.bin crc: 0x%02X\n", lt9611c->fw_crc);
+
+ return 0;
+}
+
+static void lt9611c_config_parameters(struct lt9611c *lt9611c)
+{
+ i2c_write_byte(lt9611c, 0xFF, 0xE0);
+ i2c_write_byte(lt9611c, 0xEE, 0x01);
+ //fifo_rst_n
+ i2c_write_byte(lt9611c, 0xFF, 0xE1);
+ i2c_write_byte(lt9611c, 0x03, 0x3F);
+ i2c_write_byte(lt9611c, 0x03, 0xFF);
+
+ i2c_write_byte(lt9611c, 0xFF, 0xE0);
+ i2c_write_byte(lt9611c, 0x5E, 0xC1);
+ i2c_write_byte(lt9611c, 0x58, 0x00);
+ i2c_write_byte(lt9611c, 0x59, 0x50);
+ i2c_write_byte(lt9611c, 0x5A, 0x10);
+ i2c_write_byte(lt9611c, 0x5A, 0x00);
+ i2c_write_byte(lt9611c, 0x58, 0x21);
+}
+
+static void lt9611c_flash_to_fifo(struct lt9611c *lt9611c, u64 addr)
+{
+ i2c_write_byte(lt9611c, 0xff, 0xe0);
+ i2c_write_byte(lt9611c, 0x5e, 0x5f);
+ i2c_write_byte(lt9611c, 0x5a, 0x20);
+ i2c_write_byte(lt9611c, 0x5a, 0x00);
+ i2c_write_byte(lt9611c, 0x5b, ((addr & 0xFF0000) >> 16));
+ i2c_write_byte(lt9611c, 0x5c, ((addr & 0xFF00) >> 8));
+ i2c_write_byte(lt9611c, 0x5d, (addr & 0xFF));
+ i2c_write_byte(lt9611c, 0x5a, 0x10);
+ i2c_write_byte(lt9611c, 0x5a, 0x00);
+}
+
+static void lt9611c_wren(struct lt9611c *lt9611c)
+{
+ i2c_write_byte(lt9611c, 0xff, 0xe0);
+ i2c_write_byte(lt9611c, 0x5a, 0x04);
+ i2c_write_byte(lt9611c, 0x5a, 0x00);
+}
+
+static void lt9611c_wrdi(struct lt9611c *lt9611c)
+{
+ i2c_write_byte(lt9611c, 0xFF, 0xE0);
+ i2c_write_byte(lt9611c, 0x5A, 0x08);
+ i2c_write_byte(lt9611c, 0x5A, 0x00);
+}
+
+static int lt9611c_upgrade_judgment(struct lt9611c *lt9611c)
+{
+ struct device *dev = lt9611c->dev;
+ int ret;
+ u8 flash_crc;
+
+ if (!lt9611c)
+ return -EINVAL;
+
+ lt9611c_config_parameters(lt9611c);
+ lt9611c_flash_to_fifo(lt9611c, FW_SIZE - 1);
+ i2c_write_byte(lt9611c, 0x58, 0x21);
+
+ ret = i2c_read_byte(lt9611c, 0x5f, &flash_crc);
+ if (ret < 0) {
+ dev_err(dev, "failed to read flash crc\n");
+ return ret;
+ }
+
+ dev_info(dev, "flash firmware crc=0x%02X, expected crc=0x%02X",
+ flash_crc, lt9611c->fw_crc);
+
+ lt9611c_wrdi(lt9611c);
+
+ return (flash_crc == lt9611c->fw_crc) ? NOT_UPGRADE : UPGRADE;
+}
+
+static int read_flash_reg_status(struct lt9611c *lt9611c, u8 *status)
+{
+ struct device *dev = lt9611c->dev;
+ int ret;
+
+ //fifo_rst_n
+ i2c_write_byte(lt9611c, 0xFF, 0xE1);
+ i2c_write_byte(lt9611c, 0x03, 0x3F);
+ i2c_write_byte(lt9611c, 0x03, 0xFF);
+
+ i2c_write_byte(lt9611c, 0xFF, 0xE0);
+ i2c_write_byte(lt9611c, 0x5e, 0x40);
+ i2c_write_byte(lt9611c, 0x56, 0x05);
+ i2c_write_byte(lt9611c, 0x55, 0x25);
+ i2c_write_byte(lt9611c, 0x55, 0x01);
+ i2c_write_byte(lt9611c, 0x58, 0x21);
+
+ ret = i2c_read_byte(lt9611c, 0x5f, status);
+ if (ret < 0)
+ dev_err(dev, "failed to read flash register status\n");
+
+ return ret;
+}
+
+static void lt9611c_block_erase(struct lt9611c *lt9611c)
+{
+ struct device *dev = lt9611c->dev;
+ u32 i = 0;
+ u8 flash_status = 0;
+ u8 block_num = 0x00;
+ u32 flash_addr = 0x00;
+
+ for (block_num = 0; block_num < 2; block_num++) {
+ flash_addr = (block_num * 0x008000);
+ i2c_write_byte(lt9611c, 0xFF, 0xE0);
+ i2c_write_byte(lt9611c, 0xEE, 0x01);
+ i2c_write_byte(lt9611c, 0x5A, 0x04);
+ i2c_write_byte(lt9611c, 0x5A, 0x00);
+ i2c_write_byte(lt9611c, 0x5B, flash_addr >> 16);
+ i2c_write_byte(lt9611c, 0x5C, flash_addr >> 8);
+ i2c_write_byte(lt9611c, 0x5D, flash_addr);
+ i2c_write_byte(lt9611c, 0x5A, 0x01);
+ i2c_write_byte(lt9611c, 0x5A, 0x00);
+ msleep(100);
+ i = 0;
+ while (1) {
+ read_flash_reg_status(lt9611c, &flash_status);
+ if ((flash_status & 0x01) == 0)
+ break;
+
+ if (i > 50)
+ break;
+
+ i++;
+ msleep(50);
+ }
+ }
+
+ dev_info(dev, "erase flash done.\n");
+}
+
+static void lt9611c_crc_to_sram(struct lt9611c *lt9611c)
+{
+ i2c_write_byte(lt9611c, 0xff, 0xe0);
+ i2c_write_byte(lt9611c, 0x51, 0x00);
+ i2c_write_byte(lt9611c, 0x55, 0xc0);
+ i2c_write_byte(lt9611c, 0x55, 0x80);
+ i2c_write_byte(lt9611c, 0x5e, 0xc0);
+ i2c_write_byte(lt9611c, 0x58, 0x21);
+}
+
+static void lt9611c_data_to_sram(struct lt9611c *lt9611c)
+{
+ i2c_write_byte(lt9611c, 0xff, 0xe0);
+ i2c_write_byte(lt9611c, 0x51, 0xff);
+ i2c_write_byte(lt9611c, 0x55, 0x80);
+ i2c_write_byte(lt9611c, 0x5e, 0xc0);
+ i2c_write_byte(lt9611c, 0x58, 0x21);
+}
+
+static void lt9611c_sram_to_flash(struct lt9611c *lt9611c, u64 addr)
+{
+ i2c_write_byte(lt9611c, 0xff, 0xe0);
+ i2c_write_byte(lt9611c, 0x5b, ((addr & 0xFF0000) >> 16));
+ i2c_write_byte(lt9611c, 0x5c, ((addr & 0xFF00) >> 8));
+ i2c_write_byte(lt9611c, 0x5d, (addr & 0xFF));
+ i2c_write_byte(lt9611c, 0x5A, 0x30);
+ i2c_write_byte(lt9611c, 0x5A, 0x00);
+}
+
+static int lt9611c_write_data(struct lt9611c *lt9611c, u64 addr)
+{
+ struct device *dev = lt9611c->dev;
+ int ret;
+ int page = 0, num = 0, i = 0;
+ const u8 *data;
+ u64 size, index;
+ u8 value;
+
+ data = lt9611c->fw->data;
+ size = lt9611c->fw->size;
+
+ page = (size + LT_PAGE_SIZE - 1) / LT_PAGE_SIZE;
+
+ if (page * LT_PAGE_SIZE > 64 * 1024) {
+ dev_err(dev, "firmware size out of range\n");
+ return -EINVAL;
+ }
+
+ dev_info(dev, "%u pages, total size %llu byte\n", page, size);
+
+ for (num = 0; num < page; num++) {
+ lt9611c_data_to_sram(lt9611c);
+
+ for (i = 0; i < LT_PAGE_SIZE; i++) {
+ index = num * LT_PAGE_SIZE + i;
+ value = (index < size) ? data[index] : 0xFF;
+
+ ret = i2c_write_byte(lt9611c, 0x59, value);
+ if (ret < 0) {
+ dev_err(dev, "write error at page %u, index
%u\n", num, i);
+ return ret;
+ }
+ }
+
+ lt9611c_wren(lt9611c);
+ lt9611c_sram_to_flash(lt9611c, addr);
+
+ addr += LT_PAGE_SIZE;
+ }
+
+ lt9611c_wrdi(lt9611c);
+
+ return 0;
+}
+
+static int lt9611c_write_crc(struct lt9611c *lt9611c, u64 addr)
+{
+ struct device *dev = lt9611c->dev;
+ int ret;
+ u8 crc;
+
+ crc = lt9611c->fw_crc;
+ lt9611c_crc_to_sram(lt9611c);
+ ret = i2c_write_byte(lt9611c, 0x59, crc);
+ if (ret < 0) {
+ dev_err(dev, "failed to write CRC\n");
+ return -1;
+ }
+
+ lt9611c_wren(lt9611c);
+ lt9611c_sram_to_flash(lt9611c, addr);
+ lt9611c_wrdi(lt9611c);
+
+ dev_info(dev, "CRC 0x%02X written to flash at addr 0x%llX\n", crc,
addr);
+
+ return 0;
+}
+
+static int lt9611c_firmware_upgrade(struct lt9611c *lt9611c)
+{
+ struct device *dev = lt9611c->dev;
+ int ret;
+
+ dev_info(dev, "starting firmware upgrade, size: %zu bytes\n",
lt9611c->fw->size);
+
+ lt9611c_config_parameters(lt9611c);
+ lt9611c_block_erase(lt9611c);
+
+ ret = lt9611c_write_data(lt9611c, 0);
+ if (ret < 0) {
+ dev_err(dev, "Failed to write firmware data\n");
+ return ret;
+ }
+
+ ret = lt9611c_write_crc(lt9611c, FW_SIZE - 1);
+ if (ret < 0) {
+ dev_err(dev, "Failed to write firmware CRC\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int lt9611c_upgrade_result(struct lt9611c *lt9611c)
+{
+ struct device *dev = lt9611c->dev;
+ u8 crc_result;
+
+ i2c_write_byte(lt9611c, 0xff, 0xe0);
+ i2c_write_byte(lt9611c, 0xee, 0x01);
+ i2c_read_byte(lt9611c, 0x21, &crc_result);
+
+ if (crc_result == lt9611c->fw_crc) {
+ dev_info(dev, "LT9611C firmware upgrade success, CRC=0x%02X\n",
crc_result);
+ return 0;
+ }
+
+ dev_err(dev, "LT9611C firmware upgrade failed, expected CRC=0x%02X,
read CRC=0x%02X\n",
+ lt9611c->fw_crc, crc_result);
+ return -EIO;
+}
+
+static struct lt9611c *bridge_to_lt9611c(struct drm_bridge *bridge)
+{
+ return container_of(bridge, struct lt9611c, bridge);
+}
+
+static void lt9611c_lock(struct lt9611c *lt9611c)
+{
+ mutex_lock(<9611c->ocm_lock);
+ i2c_write_byte(lt9611c, 0xff, 0xe0);
+ i2c_write_byte(lt9611c, 0xee, 0x01);
+}
+
+static void lt9611c_unlock(struct lt9611c *lt9611c)
+{
+ i2c_write_byte(lt9611c, 0xff, 0xe0);
+ i2c_write_byte(lt9611c, 0xee, 0x00);
+ mutex_unlock(<9611c->ocm_lock);
+}
+
+static irqreturn_t lt9611c_irq_thread_handler(int irq, void *dev_id)
+{
+ struct lt9611c *lt9611c = dev_id;
+ struct device *dev = lt9611c->dev;
+ int ret;
+ u8 irq_status;
+ u8 cmd[5] = {0x52, 0x48, 0x31, 0x3a, 0x00};
+ u8 data[5];
+
+ mutex_lock(<9611c->ocm_lock);
+ i2c_write_byte(lt9611c, 0xff, 0xe0);
+ i2c_read_byte(lt9611c, 0x84, &irq_status);
+
+ if (!(irq_status & BIT(0))) {
+ mutex_unlock(<9611c->ocm_lock);
+ return IRQ_HANDLED;
+ }
+ dev_info(dev, "HPD interrupt triggered.\n");
+
+ i2c_write_byte(lt9611c, 0xdf, irq_status & BIT(0));
+ usleep_range(10000, 12000);
+ i2c_write_byte(lt9611c, 0xdf, irq_status & (~BIT(0)));
+
+ ret = i2c_read_write_flow(lt9611c, cmd, 5, data, 5);
+ if (ret) {
+ dev_err(dev, "failed to read HPD status\n");
+ } else {
+ lt9611c->hdmi_connected = (data[4] == 0x02);
+ dev_info(dev, "HDMI %s\n", lt9611c->hdmi_connected ?
"connected" : "disconnected");
+ }
+
+ lt9611c->audio_status = lt9611c->hdmi_connected ?
+ connector_status_connected :
+ connector_status_disconnected;
+
+ schedule_work(<9611c->work);
+
+ mutex_unlock(<9611c->ocm_lock);
+
+ return IRQ_HANDLED;
+}
+
+static void lt9611c_hpd_work(struct work_struct *work)
+{
+ struct lt9611c *lt9611c = container_of(work, struct lt9611c, work);
+ bool connected;
+
+ mutex_lock(<9611c->ocm_lock);
+ connected = lt9611c->hdmi_connected;
+ mutex_unlock(<9611c->ocm_lock);
+
+ drm_bridge_hpd_notify(<9611c->bridge,
+ connected ?
+ connector_status_connected :
+ connector_status_disconnected);
+
+ lt9611c_audio_update_connector_status(lt9611c);
+}
+
+static void lt9611c_reset(struct lt9611c *lt9611c)
+{
+ gpiod_set_value_cansleep(lt9611c->reset_gpio, 1);
+ msleep(20);
+ gpiod_set_value_cansleep(lt9611c->reset_gpio, 0);
+ msleep(20);
+ gpiod_set_value_cansleep(lt9611c->reset_gpio, 1);
+ msleep(400);
+}
+
+static int lt9611c_regulator_init(struct lt9611c *lt9611c)
+{
+ struct device *dev = lt9611c->dev;
+ int ret;
+
+ lt9611c->supplies[0].supply = "vcc";
+ lt9611c->supplies[1].supply = "vdd";
+
+ ret = devm_regulator_bulk_get(dev, 2, lt9611c->supplies);
+
+ return ret;
+}
+
+static int lt9611c_regulator_enable(struct lt9611c *lt9611c)
+{
+ int ret;
+
+ ret = regulator_enable(lt9611c->supplies[0].consumer);
+ if (ret < 0)
+ return ret;
+
+ usleep_range(5000, 10000);
+
+ ret = regulator_enable(lt9611c->supplies[1].consumer);
+ if (ret < 0) {
+ regulator_disable(lt9611c->supplies[0].consumer);
+ return ret;
+ }
+
+ return ret;
+}
+
+static int lt9611c_regulator_disable(struct lt9611c *lt9611c)
+{
+ int ret;
+
+ ret = regulator_disable(lt9611c->supplies[0].consumer);
+ if (ret < 0)
+ return ret;
+
+ usleep_range(5000, 10000);
+
+ ret = regulator_disable(lt9611c->supplies[1].consumer);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static struct mipi_dsi_device *lt9611c_attach_dsi(struct lt9611c *lt9611c,
+ struct device_node *dsi_node)
+{
+ const struct mipi_dsi_device_info info = { "lt9611c", 0, NULL };
+ struct mipi_dsi_device *dsi;
+ struct mipi_dsi_host *host;
+ struct device *dev = lt9611c->dev;
+ int ret;
+
+ host = of_find_mipi_dsi_host_by_node(dsi_node);
+ if (!host)
+ return ERR_PTR(dev_err_probe(dev, -EPROBE_DEFER, "failed to
find dsi host\n"));
+
+ dsi = devm_mipi_dsi_device_register_full(dev, host, &info);
+ if (IS_ERR(dsi)) {
+ dev_err(dev, "failed to create dsi device\n");
+ return dsi;
+ }
+
+ dsi->lanes = 4;
+ dsi->format = MIPI_DSI_FMT_RGB888;
+ dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
+ MIPI_DSI_MODE_VIDEO_HSE;
+
+ ret = devm_mipi_dsi_attach(dev, dsi);
+ if (ret < 0) {
+ dev_err(dev, "failed to attach dsi to host\n");
+ return ERR_PTR(ret);
+ }
+
+ return dsi;
+}
+
+static int lt9611c_bridge_attach(struct drm_bridge *bridge,
+ struct drm_encoder *encoder,
+ enum drm_bridge_attach_flags flags)
+{
+ struct lt9611c *lt9611c = bridge_to_lt9611c(bridge);
+
+ return drm_bridge_attach(encoder, lt9611c->next_bridge,
+ bridge, flags);
+}
+
+static enum drm_mode_status lt9611c_bridge_mode_valid(struct drm_bridge
*bridge,
+ const struct
drm_display_info *info,
+ const struct drm_display_mode *mode)
+{
+ u32 pixclk;
+
+ pixclk = (mode->htotal * mode->vtotal * drm_mode_vrefresh(mode)) /
1000000;
+
+ if (pixclk >= 25 && pixclk <= 340)
+ return MODE_OK;
+ else
+ return MODE_BAD;
+}
+
+static void lt9611c_bridge_mode_set(struct drm_bridge *bridge,
+ const struct drm_display_mode *mode,
+ const struct drm_display_mode *adj_mode)
+{
+ struct lt9611c *lt9611c = bridge_to_lt9611c(bridge);
+ struct device *dev = lt9611c->dev;
+ int ret;
+ u32 h_total, hactive, hsync_len, hfront_porch, hback_porch;
+ u32 v_total, vactive, vsync_len, vfront_porch, vback_porch;
+ u8 video_timing_set_cmd[26] = {0x57, 0x4D, 0x33, 0x3A};
+ u8 return_timing_set_param[3];
+ u8 framerate;
+ u8 vic = 0x00;
+
+ h_total = mode->htotal;
+ hactive = mode->hdisplay;
+ hsync_len = mode->hsync_end - mode->hsync_start;
+ hfront_porch = mode->hsync_start - mode->hdisplay;
+ hback_porch = mode->htotal - mode->hsync_end;
+
+ v_total = mode->vtotal;
+ vactive = mode->vdisplay;
+ vsync_len = mode->vsync_end - mode->vsync_start;
+ vfront_porch = mode->vsync_start - mode->vdisplay;
+ vback_porch = mode->vtotal - mode->vsync_end;
+ framerate = drm_mode_vrefresh(mode);
+ vic = drm_match_cea_mode(mode);
+
+ dev_info(dev, "Out video info:\n");
+ dev_info(dev,
+ "h_total=%d, hactive=%d, hsync_len=%d, hfront_porch=%d,
hback_porch=%d\n",
+ h_total, hactive, hsync_len, hfront_porch, hback_porch);
+ dev_info(dev,
+ "v_total=%d, vactive=%d, vsync_len=%d, vfront_porch=%d,
vback_porch=%d\n",
+ v_total, vactive, vsync_len, vfront_porch, vback_porch);
+
+ dev_info(dev, "framerate=%d\n", framerate);
+ dev_info(dev, "vic = 0x%02X\n", vic);
+
+ video_timing_set_cmd[4] = (h_total >> 8) & 0xFF;
+ video_timing_set_cmd[5] = h_total & 0xFF;
+ video_timing_set_cmd[6] = (hactive >> 8) & 0xFF;
+ video_timing_set_cmd[7] = hactive & 0xFF;
+ video_timing_set_cmd[8] = (hfront_porch >> 8) & 0xFF;
+ video_timing_set_cmd[9] = hfront_porch & 0xFF;
+ video_timing_set_cmd[10] = (hsync_len >> 8) & 0xFF;
+ video_timing_set_cmd[11] = hsync_len & 0xFF;
+ video_timing_set_cmd[12] = (hback_porch >> 8) & 0xFF;
+ video_timing_set_cmd[13] = hback_porch & 0xFF;
+ video_timing_set_cmd[14] = (v_total >> 8) & 0xFF;
+ video_timing_set_cmd[15] = v_total & 0xFF;
+ video_timing_set_cmd[16] = (vactive >> 8) & 0xFF;
+ video_timing_set_cmd[17] = vactive & 0xFF;
+ video_timing_set_cmd[18] = (vfront_porch >> 8) & 0xFF;
+ video_timing_set_cmd[19] = vfront_porch & 0xFF;
+ video_timing_set_cmd[20] = (vsync_len >> 8) & 0xFF;
+ video_timing_set_cmd[21] = vsync_len & 0xFF;
+ video_timing_set_cmd[22] = (vback_porch >> 8) & 0xFF;
+ video_timing_set_cmd[23] = vback_porch & 0xFF;
+ video_timing_set_cmd[24] = framerate;
+ video_timing_set_cmd[25] = vic;
+
+ mutex_lock(<9611c->ocm_lock);
+ ret = i2c_read_write_flow(lt9611c, video_timing_set_cmd, 26,
return_timing_set_param, 3);
+ if (ret)
+ dev_err(dev, "video set failed\n");
+ mutex_unlock(<9611c->ocm_lock);
+}
+
+static enum drm_connector_status lt9611c_bridge_detect(struct drm_bridge
*bridge,
+ struct drm_connector
*connector)
+{
+ struct lt9611c *lt9611c = bridge_to_lt9611c(bridge);
+ struct device *dev = lt9611c->dev;
+ int ret;
+ bool connected = false;
+ u8 cmd[5] = {0x52, 0x48, 0x31, 0x3a, 0x00};
+ u8 data[5];
+
+ mutex_lock(<9611c->ocm_lock);
+ ret = i2c_read_write_flow(lt9611c, cmd, 5, data, 5);
+ if (ret) {
+ dev_err(dev, "Failed to read HPD status, cannot determine HDMI
connection (err=%d)\n",
+ ret);
+ } else {
+ connected = (data[4] == 0x02);
+ }
+
+ lt9611c->hdmi_connected = connected;
+
+ if (lt9611c->hdmi_connected)
+ lt9611c->audio_status = connector_status_connected;
+ else
+ lt9611c->audio_status = connector_status_disconnected;
+
+ mutex_unlock(<9611c->ocm_lock);
+
+ return connected ? connector_status_connected :
+ connector_status_disconnected;
+}
+
+static int lt9611c_read_edid(struct lt9611c *lt9611c)
+{
+ struct device *dev = lt9611c->dev;
+ int ret, i, bytes_to_copy, offset = 0;
+ u8 packets_num;
+ u8 read_edid_data_cmd[5] = {0x52, 0x48, 0x33, 0x3A, 0x00};
+ u8 return_edid_data[37];
+ u8 read_edid_byte_num_cmd[5] = {0x52, 0x48, 0x32, 0x3A, 0x00};
+ u8 return_edid_byte_num[6];
+
+ ret = i2c_read_write_flow(lt9611c, read_edid_byte_num_cmd, 5,
return_edid_byte_num, 6);
+ if (ret) {
+ dev_err(dev, "Failed to read EDID byte number\n");
+ lt9611c->edid_valid = false;
+ return ret;
+ }
+
+ lt9611c->edid_len = (return_edid_byte_num[4] << 8) |
return_edid_byte_num[5];
+
+ if (!lt9611c->edid_buf || lt9611c->edid_len > (lt9611c->edid_valid ?
+ lt9611c->edid_len : 0)) {
+ kfree(lt9611c->edid_buf);
+ lt9611c->edid_buf = kzalloc(lt9611c->edid_len, GFP_KERNEL);
+ if (!lt9611c->edid_buf) {
+ dev_err(dev, "Failed to allocate EDID buffer\n");
+ lt9611c->edid_len = 0;
+ lt9611c->edid_valid = false;
+ return -ENOMEM;
+ }
+ }
+
+ packets_num = (lt9611c->edid_len % 32) ? (lt9611c->edid_len / 32 + 1) :
+ (lt9611c->edid_len / 32);
+ for (i = 0; i < packets_num; i++) {
+ read_edid_data_cmd[4] = (u8)i;
+ ret = i2c_read_write_flow(lt9611c, read_edid_data_cmd, 5,
return_edid_data, 37);
+ if (ret) {
+ dev_err(dev, "Failed to read EDID packet %d\n", i);
+ lt9611c->edid_valid = false;
+ return -EIO;
+ }
+ offset = i * 32;
+ bytes_to_copy = min(32, lt9611c->edid_len - offset);
+ memcpy(lt9611c->edid_buf + offset, &return_edid_data[5],
bytes_to_copy);
+ }
+
+ lt9611c->edid_valid = true;
+
+ return ret;
+}
+
+static int lt9611c_get_edid_block(void *data, u8 *buf, unsigned int block,
size_t len)
+{
+ struct lt9611c *lt9611c = data;
+ struct device *dev = lt9611c->dev;
+ unsigned int total_blocks;
+ int ret;
+
+ if (len > 128)
+ return -EINVAL;
+
+ guard(mutex)(<9611c->ocm_lock);
+ if (block == 0 || !lt9611c->edid_valid) {
+ ret = lt9611c_read_edid(lt9611c);
+ if (ret) {
+ dev_err(dev, "EDID read failed\n");
+ return ret;
+ }
+ }
+
+ total_blocks = lt9611c->edid_len / 128;
+ if (!total_blocks) {
+ dev_err(dev, "No valid EDID blocks\n");
+ return -EIO;
+ }
+
+ if (block >= total_blocks) {
+ dev_err(dev, "Requested block %u exceeds total blocks %u\n",
+ block, total_blocks);
+ return -EINVAL;
+ }
+
+ memcpy(buf, lt9611c->edid_buf + block * 128, len);
+
+ return 0;
+}
+
+static const struct drm_edid *lt9611c_bridge_edid_read(struct drm_bridge
*bridge,
+ struct drm_connector
*connector)
+{
+ struct lt9611c *lt9611c = bridge_to_lt9611c(bridge);
+
+ usleep_range(10000, 20000);
+ return drm_edid_read_custom(connector, lt9611c_get_edid_block, lt9611c);
+}
+
+static const struct drm_bridge_funcs lt9611c_bridge_funcs = {
+ .attach = lt9611c_bridge_attach,
+ .mode_valid = lt9611c_bridge_mode_valid,
+ .mode_set = lt9611c_bridge_mode_set,
+ .detect = lt9611c_bridge_detect,
+ .edid_read = lt9611c_bridge_edid_read,
+};
+
+static int lt9611c_parse_dt(struct device *dev,
+ struct lt9611c *lt9611c)
+{
+ lt9611c->dsi0_node = of_graph_get_remote_node(dev->of_node, 0, -1);
+ if (!lt9611c->dsi0_node) {
+ dev_err(dev, "failed to get remote node for primary dsi\n");
+ return -ENODEV;
+ }
+
+ lt9611c->dsi1_node = of_graph_get_remote_node(dev->of_node, 1, -1);
+
+ return drm_of_find_panel_or_bridge(dev->of_node, 2, -1, NULL,
<9611c->next_bridge);
+}
+
+static int lt9611c_gpio_init(struct lt9611c *lt9611c)
+{
+ struct device *dev = lt9611c->dev;
+
+ lt9611c->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
+ if (IS_ERR(lt9611c->reset_gpio)) {
+ dev_err(dev, "failed to acquire reset gpio\n");
+ return PTR_ERR(lt9611c->reset_gpio);
+ }
+
+ return 0;
+}
+
+static void lt9611c_read_version(struct lt9611c *lt9611c, u64 *version)
+{
+ u8 val;
+ u64 ver = 0;
+
+ i2c_write_byte(lt9611c, 0xff, 0xe0);
+ i2c_write_byte(lt9611c, 0xee, 0x01);
+
+ i2c_read_byte(lt9611c, 0x80, &val);
+ ver = val;
+
+ i2c_read_byte(lt9611c, 0x81, &val);
+ ver = (ver << 8) | val;
+
+ *version = ver;
+}
+
+static int lt9611c_read_chipid(struct lt9611c *lt9611c)
+{
+ struct device *dev = lt9611c->dev;
+ u8 val = 0;
+
+ i2c_write_byte(lt9611c, 0xff, 0xe0);
+ i2c_write_byte(lt9611c, 0xee, 0x01);
+ i2c_write_byte(lt9611c, 0xff, 0xe1);
+
+ i2c_read_byte(lt9611c, 0x00, &val);
+ if (val != 0x23)
+ return -ENODEV;
+
+ i2c_read_byte(lt9611c, 0x01, &val);
+ if (val != 0x06)
+ return -ENODEV;
+
+ dev_info(dev, "ChipId = 0x2306\n");
+
+ return 0;
+}
+
+static int lt9611c_hdmi_hw_params(struct device *dev, void *data,
+ struct hdmi_codec_daifmt *fmt,
+ struct hdmi_codec_params *hparms)
+{
+ struct lt9611c *lt9611c = dev_get_drvdata(dev);
+
+ dev_info(lt9611c->dev, "SOC sample_rate: %d, sample_width: %d, fmt:
%d\n",
+ hparms->sample_rate, hparms->sample_width, fmt->fmt);
+
+ switch (hparms->sample_rate) {
+ case 32000:
+ case 44100:
+ case 48000:
+ case 88200:
+ case 96000:
+ case 176400:
+ case 192000:
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ switch (hparms->sample_width) {
+ case 16:
+ case 18:
+ case 20:
+ case 24:
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ switch (fmt->fmt) {
+ case HDMI_I2S:
+ case HDMI_SPDIF:
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static void lt9611c_audio_shutdown(struct device *dev, void *data)
+{
+}
+
+static int lt9611c_audio_startup(struct device *dev, void *data)
+{
+ return 0;
+}
+
+static void lt9611c_audio_update_connector_status(struct lt9611c *lt9611c)
+{
+ enum drm_connector_status status;
+
+ status = lt9611c->audio_status;
+ if (lt9611c->plugged_cb && lt9611c->codec_dev)
+ lt9611c->plugged_cb(lt9611c->codec_dev,
+ status == connector_status_connected);
+}
+
+static int lt9611c_hdmi_audio_hook_plugged_cb(struct device *dev,
+ void *data,
+ hdmi_codec_plugged_cb fn,
+ struct device *codec_dev)
+{
+ struct lt9611c *lt9611c = data;
+
+ lt9611c->plugged_cb = fn;
+ lt9611c->codec_dev = codec_dev;
+ lt9611c_audio_update_connector_status(lt9611c);
+
+ return 0;
+}
+
+static const struct hdmi_codec_ops lt9611c_codec_ops = {
+ .hw_params = lt9611c_hdmi_hw_params,
+ .audio_shutdown = lt9611c_audio_shutdown,
+ .audio_startup = lt9611c_audio_startup,
+ .hook_plugged_cb = lt9611c_hdmi_audio_hook_plugged_cb,
+};
+
+static int lt9611c_audio_init(struct device *dev, struct lt9611c *lt9611c)
+{
+ struct hdmi_codec_pdata codec_data = {
+ .ops = <9611c_codec_ops,
+ .max_i2s_channels = 2,
+ .i2s = 1,
+ .data = lt9611c,
+ };
+
+ lt9611c->audio_pdev =
+ platform_device_register_data(dev, HDMI_CODEC_DRV_NAME,
+ PLATFORM_DEVID_AUTO,
+ &codec_data, sizeof(codec_data));
+
+ return PTR_ERR_OR_ZERO(lt9611c->audio_pdev);
+}
+
+static void lt9611c_audio_exit(struct lt9611c *lt9611c)
+{
+ if (lt9611c->audio_pdev) {
+ platform_device_unregister(lt9611c->audio_pdev);
+ lt9611c->audio_pdev = NULL;
+ }
+}
+
+static int lt9611c_firmware_update_store(struct lt9611c *lt9611c)
+{
+ struct device *dev = lt9611c->dev;
+ int ret;
+
+ lt9611c_lock(lt9611c);
+ ret = lt9611c_prepare_firmware_data(lt9611c);
+ if (ret < 0) {
+ dev_err(dev, "Failed prepare firmware data: %d\n", ret);
+ goto out;
+ }
+
+ ret = lt9611c_firmware_upgrade(lt9611c);
+ if (ret < 0) {
+ dev_err(dev, "upgrade failure\n");
+ goto out;
+ }
+ lt9611c_reset(lt9611c);
+ ret = lt9611c_upgrade_result(lt9611c);
+ if (ret < 0)
+ goto out;
+
+out:
+ lt9611c_unlock(lt9611c);
+ lt9611c_reset(lt9611c);
+ if (lt9611c->fw) {
+ release_firmware(lt9611c->fw);
+ lt9611c->fw = NULL;
+ }
+
+ return ret;
+}
+
+static ssize_t lt9611c_firmware_store(struct device *dev, struct
device_attribute *attr,
+ const char *buf, size_t len)
+{
+ struct lt9611c *lt9611c = dev_get_drvdata(dev);
+ int ret;
+
+ ret = lt9611c_firmware_update_store(lt9611c);
+ if (ret < 0)
+ return ret;
+ return len;
+}
+
+static ssize_t lt9611c_firmware_show(struct device *dev, struct
device_attribute *attr, char *buf)
+{
+ struct lt9611c *lt9611c = dev_get_drvdata(dev);
+
+ return sysfs_emit(buf, "0x%04llx\n", lt9611c->fw_version);
+}
+
+static DEVICE_ATTR_RW(lt9611c_firmware);
+
+static struct attribute *lt9611c_attrs[] = {
+ &dev_attr_lt9611c_firmware.attr,
+ NULL,
+};
+
+static const struct attribute_group lt9611c_attr_group = {
+ .attrs = lt9611c_attrs,
+};
+
+static const struct attribute_group *lt9611c_attr_groups[] = {
+ <9611c_attr_group,
+ NULL,
+};
+
+static void lt9611c_cleanup_resources(struct lt9611c *lt9611c)
+{
+ struct device *dev = lt9611c->dev;
+
+ if (lt9611c->work_inited) {
+ cancel_work_sync(<9611c->work);
+ lt9611c->work_inited = false;
+ dev_err(dev, "work cancelled\n");
+ }
+
+ if (lt9611c->bridge_added) {
+ drm_bridge_remove(<9611c->bridge);
+ lt9611c->bridge_added = false;
+ dev_err(dev, "DRM bridge removed\n");
+ }
+
+ if (lt9611c->regulators_enabled) {
+ regulator_bulk_disable(ARRAY_SIZE(lt9611c->supplies),
lt9611c->supplies);
+ lt9611c->regulators_enabled = false;
+ dev_err(dev, "regulators disabled\n");
+ }
+
+ if (lt9611c->audio_pdev)
+ lt9611c_audio_exit(lt9611c);
+
+ if (lt9611c->fw) {
+ release_firmware(lt9611c->fw);
+ lt9611c->fw = NULL;
+ dev_err(dev, "firmware released\n");
+ }
+
+ if (lt9611c->dsi0_node) {
+ of_node_put(lt9611c->dsi0_node);
+ lt9611c->dsi0_node = NULL;
+ dev_err(dev, "dsi0 node released\n");
+ }
+
+ if (lt9611c->dsi1_node) {
+ of_node_put(lt9611c->dsi1_node);
+ lt9611c->dsi1_node = NULL;
+ dev_err(dev, "dsi1 node released\n");
+ }
+}
+
+static int lt9611c_main(void *data)
+{
+ struct lt9611c *lt9611c = data;
+ struct device *dev = lt9611c->dev;
+ struct i2c_client *client = lt9611c->client;
+ int ret;
+
+ lt9611c->work_inited = false;
+ lt9611c->bridge_added = false;
+ lt9611c->regulators_enabled = false;
+
+ ret = lt9611c_parse_dt(dev, lt9611c);
+ if (ret) {
+ dev_err(dev, "failed to parse device tree\n");
+ return ret;
+ }
+
+ ret = lt9611c_gpio_init(lt9611c);
+ if (ret < 0)
+ goto err_cleanup;
+
+ ret = lt9611c_regulator_init(lt9611c);
+ if (ret < 0)
+ goto err_cleanup;
+
+ ret = lt9611c_regulator_enable(lt9611c);
+ if (ret)
+ goto err_cleanup;
+
+ lt9611c->regulators_enabled = true;
+
+ lt9611c_reset(lt9611c);
+
+ ret = lt9611c_read_chipid(lt9611c);
+ if (ret < 0) {
+ dev_err(dev, "failed to read chip id.\n");
+ goto err_cleanup;
+ }
+
+ lt9611c_lock(lt9611c);
+ lt9611c_read_version(lt9611c, <9611c->fw_version);
+
+ ret = lt9611c_prepare_firmware_data(lt9611c);
+ if (ret == 0 && lt9611c_upgrade_judgment(lt9611c) == UPGRADE) {
+ dev_info(dev, "firmware upgrade needed\n");
+
+ ret = lt9611c_firmware_upgrade(lt9611c);
+ if (ret < 0) {
+ dev_err(dev, "firmware upgrade failed\n");
+ lt9611c_unlock(lt9611c);
+ goto err_cleanup;
+ }
+
+ lt9611c_reset(lt9611c);
+ ret = lt9611c_upgrade_result(lt9611c);
+ if (ret < 0) {
+ lt9611c_unlock(lt9611c);
+ goto err_cleanup;
+ }
+
+ lt9611c_read_version(lt9611c, <9611c->fw_version);
+ lt9611c_unlock(lt9611c);
+
+ } else {
+ dev_info(dev, "skip firmware upgrade, using chip internal
firmware\n");
+ lt9611c_unlock(lt9611c);
+ }
+
+ if (lt9611c->fw) {
+ release_firmware(lt9611c->fw);
+ lt9611c->fw = NULL;
+ }
+ dev_info(dev, "current version:0x%04llx", lt9611c->fw_version);
+
+ INIT_WORK(<9611c->work, lt9611c_hpd_work);
+ lt9611c->work_inited = true;
+
+ if (!client->irq) {
+ dev_err(dev, "failed to get INTP IRQ\n");
+ ret = -ENODEV;
+ goto err_cleanup;
+ }
+
+ ret = devm_request_threaded_irq(&client->dev, client->irq, NULL,
+ lt9611c_irq_thread_handler,
+ IRQF_TRIGGER_HIGH | IRQF_ONESHOT |
+ IRQF_NO_AUTOEN,
+ "lt9611c", lt9611c);
+ if (ret) {
+ dev_err(dev, "failed to request irq\n");
+ goto err_cleanup;
+ }
+
+ lt9611c->bridge.funcs = <9611c_bridge_funcs;
+ lt9611c->bridge.of_node = lt9611c->client->dev.of_node;
+ lt9611c->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID |
DRM_BRIDGE_OP_HPD;
+ lt9611c->bridge.type = DRM_MODE_CONNECTOR_HDMIA;
+
+ drm_bridge_add(<9611c->bridge);
+ lt9611c->bridge_added = true;
+
+ /* Attach primary DSI */
+ lt9611c->dsi0 = lt9611c_attach_dsi(lt9611c, lt9611c->dsi0_node);
+ if (IS_ERR(lt9611c->dsi0)) {
+ ret = PTR_ERR(lt9611c->dsi0);
+ dev_err(dev, "Failed to attach primary DSI, error=%d\n", ret);
+ goto err_cleanup;
+ }
+
+ /* Attach secondary DSI, if specified */
+ if (lt9611c->dsi1_node) {
+ lt9611c->dsi1 = lt9611c_attach_dsi(lt9611c, lt9611c->dsi1_node);
+ if (IS_ERR(lt9611c->dsi1)) {
+ ret = PTR_ERR(lt9611c->dsi1);
+ dev_err(dev, "Failed to attach secondary DSI,
error=%d\n", ret);
+ goto err_cleanup;
+ }
+ }
+
+ lt9611c->audio_status = connector_status_disconnected;
+
+ ret = lt9611c_audio_init(dev, lt9611c);
+ if (ret < 0) {
+ dev_err(dev, "audio init failed\n");
+ goto err_cleanup;
+ }
+
+ lt9611c_reset(lt9611c);
+ enable_irq(lt9611c->client->irq);
+
+ return 0;
+
+err_cleanup:
+ lt9611c_cleanup_resources(lt9611c);
+ return ret;
+}
+
+static int lt9611c_probe(struct i2c_client *client)
+{
+ struct lt9611c *lt9611c;
+ struct device *dev = &client->dev;
+
+ if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
+ dev_err(dev, "device doesn't support I2C\n");
+ return -ENODEV;
+ }
+
+ lt9611c = devm_kzalloc(dev, sizeof(*lt9611c), GFP_KERNEL);
+ if (!lt9611c)
+ return -ENOMEM;
+
+ lt9611c->dev = dev;
+ lt9611c->client = client;
+ mutex_init(<9611c->ocm_lock);
+
+ lt9611c->regmap = devm_regmap_init_i2c(client, <9611c_regmap_config);
+ if (IS_ERR(lt9611c->regmap)) {
+ dev_err(dev, "regmap i2c init failed\n");
+ return PTR_ERR(lt9611c->regmap);
+ }
+
+ i2c_set_clientdata(client, lt9611c);
+
+ lt9611c->kthread = kthread_run(lt9611c_main, lt9611c, "lt9611c");
+ if (IS_ERR(lt9611c->kthread)) {
+ dev_err(dev, "Failed to create kernel thread\n");
+ return PTR_ERR(lt9611c->kthread);
+ }
+
+ return 0;
+}
+
+static void lt9611c_remove(struct i2c_client *client)
+{
+ struct lt9611c *lt9611c = i2c_get_clientdata(client);
+ struct device *dev = lt9611c->dev;
+
+ kfree(lt9611c->edid_buf);
+ disable_irq(client->irq);
+ lt9611c_cleanup_resources(lt9611c);
+ mutex_destroy(<9611c->ocm_lock);
+ dev_info(dev, "remove driver\n");
+}
+
+static int lt9611c_bridge_suspend(struct device *dev)
+{
+ struct lt9611c *lt9611c = dev_get_drvdata(dev);
+ int ret;
+
+ dev_info(lt9611c->dev, "suspend\n");
+ disable_irq(lt9611c->client->irq);
+ ret = lt9611c_regulator_disable(lt9611c);
+ gpiod_set_value_cansleep(lt9611c->reset_gpio, 0);
+
+ return ret;
+}
+
+static int lt9611c_bridge_resume(struct device *dev)
+{
+ struct lt9611c *lt9611c = dev_get_drvdata(dev);
+ int ret;
+
+ ret = lt9611c_regulator_enable(lt9611c);
+ lt9611c_reset(lt9611c);
+ enable_irq(lt9611c->client->irq);
+ dev_info(lt9611c->dev, "resume\n");
+
+ return ret;
+}
+
+static const struct dev_pm_ops lt9611c_bridge_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(lt9611c_bridge_suspend,
+ lt9611c_bridge_resume)
+};
+
+static struct i2c_device_id lt9611c_id[] = {
+ { "lontium,lt9611c", 0 },
+ { /* sentinel */ }
+};
+
+static const struct of_device_id lt9611c_match_table[] = {
+ { .compatible = "lontium,lt9611c" },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, lt9611c_match_table);
+
+static struct i2c_driver lt9611c_driver = {
+ .driver = {
+ .name = "lt9611c",
+ .of_match_table = lt9611c_match_table,
+ .pm = <9611c_bridge_pm_ops,
+ .dev_groups = lt9611c_attr_groups,
+ },
+ .probe = lt9611c_probe,
+ .remove = lt9611c_remove,
+ .id_table = lt9611c_id,
+};
+module_i2c_driver(lt9611c_driver);
+
+MODULE_AUTHOR("syyang <syy...@lontium.com>");
+MODULE_LICENSE("GPL v2");
+
+MODULE_FIRMWARE(FW_FILE);
--
2.25.1
