The lt8713sx is a Type-C/DP1.4 to Type-C/DP1.4/HDMI2.0 converter, with three configurable DP1.4/HDMI2.0/DP++ output interfaces and audio output interface.
Driver is required for firmware upgrade in the bridge chip. Co-developed-by: Prahlad Valluru <[email protected]> Signed-off-by: Prahlad Valluru <[email protected]> Signed-off-by: Vishnu Saini <[email protected]> --- drivers/gpu/drm/bridge/Kconfig | 10 + drivers/gpu/drm/bridge/Makefile | 1 + drivers/gpu/drm/bridge/lontium-lt8713sx.c | 682 ++++++++++++++++++++++++++++++ 3 files changed, 693 insertions(+) diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig index a250afd8d662..7fef383ed7cb 100644 --- a/drivers/gpu/drm/bridge/Kconfig +++ b/drivers/gpu/drm/bridge/Kconfig @@ -184,6 +184,16 @@ config DRM_LONTIUM_LT9611UXC HDMI signals Please say Y if you have such hardware. +config DRM_LONTIUM_LT8713SX + tristate "Lontium LT8713SX DP MST bridge" + depends on OF + select REGMAP_I2C + help + Driver for Lontium LT8713SX DP MST bridge + chip firmware upgrade, which converts Type-C/DP1.4 + to 3 configurable Type-C/DP1.4/HDMI2.0 outputs + Please say Y if you have such hardware. + config DRM_ITE_IT66121 tristate "ITE IT66121 HDMI bridge" depends on OF diff --git a/drivers/gpu/drm/bridge/Makefile b/drivers/gpu/drm/bridge/Makefile index c7dc03182e59..07eeb13fa497 100644 --- a/drivers/gpu/drm/bridge/Makefile +++ b/drivers/gpu/drm/bridge/Makefile @@ -16,6 +16,7 @@ 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_LT9611UXC) += lontium-lt9611uxc.o +obj-$(CONFIG_DRM_LONTIUM_LT8713SX) += lontium-lt8713sx.o obj-$(CONFIG_DRM_LVDS_CODEC) += lvds-codec.o obj-$(CONFIG_DRM_MEGACHIPS_STDPXXXX_GE_B850V3_FW) += megachips-stdpxxxx-ge-b850v3-fw.o obj-$(CONFIG_DRM_MICROCHIP_LVDS_SERIALIZER) += microchip-lvds.o diff --git a/drivers/gpu/drm/bridge/lontium-lt8713sx.c b/drivers/gpu/drm/bridge/lontium-lt8713sx.c new file mode 100644 index 000000000000..6ea54ff3733d --- /dev/null +++ b/drivers/gpu/drm/bridge/lontium-lt8713sx.c @@ -0,0 +1,682 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries. + */ + +#include <linux/crc8.h> +#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 <linux/sizes.h> +#include <linux/wait.h> +#include <linux/workqueue.h> + +#include <drm/drm_bridge.h> + +#define FW_FILE "lt8713sx_fw.bin" + +#define REG_PAGE_CONTROL 0xff + +#define MAX_OUTPUT_PORTS 3 +#define LT8713SX_PAGE_SIZE 256 + +DECLARE_CRC8_TABLE(lt8713sx_crc_table); + +struct lt8713sx { + struct device *dev; + struct drm_bridge bridge; + struct drm_bridge *next_bridge[MAX_OUTPUT_PORTS]; + int num_outputs; + + struct regmap *regmap; + /* Protects all accesses to registers by stopping the on-chip MCU */ + struct mutex ocm_lock; + + struct gpio_desc *reset_gpio; + struct gpio_desc *enable_gpio; + + struct i2c_client *client; + const struct firmware *fw; + + u8 *fw_buffer; + + u32 main_crc_value; + u32 bank_crc_value[17]; + + int bank_num; +}; + +static void lt8713sx_reset(struct lt8713sx *lt8713sx); + +static const struct regmap_range lt8713sx_ranges[] = { + { + .range_min = 0x0000, + .range_max = 0xffff + }, +}; + +static const struct regmap_access_table lt8713sx_table = { + .yes_ranges = lt8713sx_ranges, + .n_yes_ranges = ARRAY_SIZE(lt8713sx_ranges), +}; + +static const struct regmap_range_cfg lt8713sx_range_cfg = { + .name = "lt8713sx", + .range_min = 0x0000, + .range_max = 0xffff, + .selector_reg = REG_PAGE_CONTROL, + .selector_mask = 0xff, + .selector_shift = 0, + .window_start = 0, + .window_len = 0x100, +}; + +static const struct regmap_config lt8713sx_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .volatile_table = <8713sx_table, + .ranges = <8713sx_range_cfg, + .num_ranges = 1, + .cache_type = REGCACHE_NONE, + .max_register = 0xffff, +}; + +static void lt8713sx_i2c_enable(struct lt8713sx *lt8713sx) +{ + regmap_write(lt8713sx->regmap, 0xe0ee, 0x01); +} + +static void lt8713sx_i2c_disable(struct lt8713sx *lt8713sx) +{ + regmap_write(lt8713sx->regmap, 0xe0ee, 0x00); +} + +static u32 calculate_crc(const u8 *upgrade_data, u64 len, u64 crc_size) +{ + u8 crc = 0x00; + u8 pad = 0xff; + + crc = crc8(lt8713sx_crc_table, upgrade_data, len, crc); + + /* pad remaining bytes */ + crc_size -= len; + while (crc_size--) + crc = crc8(lt8713sx_crc_table, &pad, 1, crc); + + return crc; +} + +static int lt8713sx_prepare_firmware_data(struct lt8713sx *lt8713sx) +{ + int ret = 0; + u64 sz_12k = 12 * SZ_1K; + + ret = request_firmware(<8713sx->fw, FW_FILE, lt8713sx->dev); + if (ret < 0) { + dev_err(lt8713sx->dev, "request firmware failed\n"); + return ret; + } + + dev_dbg(lt8713sx->dev, "Firmware size: %zu bytes\n", lt8713sx->fw->size); + + if (lt8713sx->fw->size > SZ_256K - 1) { + dev_err(lt8713sx->dev, "Firmware size exceeds 256KB limit\n"); + release_firmware(lt8713sx->fw); + return -EINVAL; + } + + lt8713sx->fw_buffer = kvmalloc(SZ_256K, GFP_KERNEL); + if (!lt8713sx->fw_buffer) { + release_firmware(lt8713sx->fw); + return -ENOMEM; + } + + memset(lt8713sx->fw_buffer, 0xff, SZ_256K); + + if (lt8713sx->fw->size < SZ_64K) { + memcpy(lt8713sx->fw_buffer, lt8713sx->fw->data, lt8713sx->fw->size); + lt8713sx->fw_buffer[SZ_64K - 1] = + calculate_crc(lt8713sx->fw->data, lt8713sx->fw->size, SZ_64K - 1); + lt8713sx->main_crc_value = lt8713sx->fw_buffer[SZ_64K - 1]; + dev_dbg(lt8713sx->dev, + "Main Firmware Data Crc=0x%02X\n", lt8713sx->main_crc_value); + + } else { + /* main firmware */ + memcpy(lt8713sx->fw_buffer, lt8713sx->fw->data, SZ_64K - 1); + lt8713sx->fw_buffer[SZ_64K - 1] = + calculate_crc(lt8713sx->fw_buffer, SZ_64K - 1, SZ_64K - 1); + lt8713sx->main_crc_value = lt8713sx->fw_buffer[SZ_64K - 1]; + dev_dbg(lt8713sx->dev, + "Main Firmware Data Crc=0x%02X\n", lt8713sx->main_crc_value); + + /* bank firmware */ + memcpy(lt8713sx->fw_buffer + SZ_64K, + lt8713sx->fw->data + SZ_64K, + lt8713sx->fw->size - SZ_64K); + + lt8713sx->bank_num = (lt8713sx->fw->size - SZ_64K + sz_12k - 1) / sz_12k; + dev_dbg(lt8713sx->dev, "Bank Number Total is %d.\n", lt8713sx->bank_num); + + for (int i = 0; i < lt8713sx->bank_num; i++) { + lt8713sx->bank_crc_value[i] = + calculate_crc(lt8713sx->fw_buffer + SZ_64K + i * sz_12k, + sz_12k, sz_12k); + dev_dbg(lt8713sx->dev, "Bank number:%d; Firmware Data Crc:0x%02X\n", + i, lt8713sx->bank_crc_value[i]); + } + } + return 0; +} + +static void lt8713sx_config_parameters(struct lt8713sx *lt8713sx) +{ + regmap_write(lt8713sx->regmap, 0xe0ee, 0x01); + regmap_write(lt8713sx->regmap, 0xe05e, 0xc1); + regmap_write(lt8713sx->regmap, 0xe058, 0x00); + regmap_write(lt8713sx->regmap, 0xe059, 0x50); + regmap_write(lt8713sx->regmap, 0xe05a, 0x10); + regmap_write(lt8713sx->regmap, 0xe05a, 0x00); + regmap_write(lt8713sx->regmap, 0xe058, 0x21); +} + +static void lt8713sx_wren(struct lt8713sx *lt8713sx) +{ + regmap_write(lt8713sx->regmap, 0xe103, 0xbf); + regmap_write(lt8713sx->regmap, 0xe103, 0xff); + regmap_write(lt8713sx->regmap, 0xe05a, 0x04); + regmap_write(lt8713sx->regmap, 0xe05a, 0x00); +} + +static void lt8713sx_wrdi(struct lt8713sx *lt8713sx) +{ + regmap_write(lt8713sx->regmap, 0xe05a, 0x08); + regmap_write(lt8713sx->regmap, 0xe05a, 0x00); +} + +static void lt8713sx_fifo_reset(struct lt8713sx *lt8713sx) +{ + regmap_write(lt8713sx->regmap, 0xe103, 0xbf); + regmap_write(lt8713sx->regmap, 0xe103, 0xff); +} + +static void lt8713sx_disable_sram_write(struct lt8713sx *lt8713sx) +{ + regmap_write(lt8713sx->regmap, 0xe055, 0x00); +} + +static void lt8713sx_sram_to_flash(struct lt8713sx *lt8713sx) +{ + regmap_write(lt8713sx->regmap, 0xe05a, 0x30); + regmap_write(lt8713sx->regmap, 0xe05a, 0x00); +} + +static void lt8713sx_i2c_to_sram(struct lt8713sx *lt8713sx) +{ + regmap_write(lt8713sx->regmap, 0xe055, 0x80); + regmap_write(lt8713sx->regmap, 0xe05e, 0xc0); + regmap_write(lt8713sx->regmap, 0xe058, 0x21); +} + +static u8 lt8713sx_read_flash_status(struct lt8713sx *lt8713sx) +{ + u32 flash_status = 0; + + regmap_write(lt8713sx->regmap, 0xe103, 0x3f); + regmap_write(lt8713sx->regmap, 0xe103, 0xff); + + regmap_write(lt8713sx->regmap, 0xe05e, 0x40); + regmap_write(lt8713sx->regmap, 0xe056, 0x05); /* opcode=read status register */ + regmap_write(lt8713sx->regmap, 0xe055, 0x25); + regmap_write(lt8713sx->regmap, 0xe055, 0x01); + regmap_write(lt8713sx->regmap, 0xe058, 0x21); + + regmap_read(lt8713sx->regmap, 0xe05f, &flash_status); + dev_dbg(lt8713sx->dev, "flash_status:%x\n", flash_status); + + return flash_status; +} + +static void lt8713sx_block_erase(struct lt8713sx *lt8713sx) +{ + u32 i = 0; + u8 flash_status = 0; + u8 blocknum = 0x00; + u32 flashaddr = 0x00; + + for (blocknum = 0; blocknum < 8; blocknum++) { + flashaddr = blocknum * SZ_32K; + regmap_write(lt8713sx->regmap, 0xe0ee, 0x01); + regmap_write(lt8713sx->regmap, 0xe05a, 0x04); + regmap_write(lt8713sx->regmap, 0xe05a, 0x00); + regmap_write(lt8713sx->regmap, 0xe05b, flashaddr >> 16); + regmap_write(lt8713sx->regmap, 0xe05c, flashaddr >> 8); + regmap_write(lt8713sx->regmap, 0xe05d, flashaddr); + regmap_write(lt8713sx->regmap, 0xe05a, 0x01); + regmap_write(lt8713sx->regmap, 0xe05a, 0x00); + msleep(100); + i = 0; + while (1) { + flash_status = lt8713sx_read_flash_status(lt8713sx); + if ((flash_status & 0x01) == 0) + break; + + if (i > 50) + break; + + i++; + msleep(50); + } + } + dev_dbg(lt8713sx->dev, "erase flash done.\n"); +} + +static void lt8713sx_load_main_fw_to_sram(struct lt8713sx *lt8713sx) +{ + regmap_write(lt8713sx->regmap, 0xe0ee, 0x01); + regmap_write(lt8713sx->regmap, 0xe068, 0x00); + regmap_write(lt8713sx->regmap, 0xe069, 0x00); + regmap_write(lt8713sx->regmap, 0xe06a, 0x00); + regmap_write(lt8713sx->regmap, 0xe065, 0x00); + regmap_write(lt8713sx->regmap, 0xe066, 0xff); + regmap_write(lt8713sx->regmap, 0xe067, 0xff); + regmap_write(lt8713sx->regmap, 0xe06b, 0x00); + regmap_write(lt8713sx->regmap, 0xe06c, 0x00); + regmap_write(lt8713sx->regmap, 0xe060, 0x01); + msleep(200); + regmap_write(lt8713sx->regmap, 0xe060, 0x00); +} + +static void lt8713sx_load_bank_fw_to_sram(struct lt8713sx *lt8713sx, u64 addr) +{ + regmap_write(lt8713sx->regmap, 0xe0ee, 0x01); + regmap_write(lt8713sx->regmap, 0xe068, ((addr & 0xff0000) >> 16)); + regmap_write(lt8713sx->regmap, 0xe069, ((addr & 0x00ff00) >> 8)); + regmap_write(lt8713sx->regmap, 0xe06a, (addr & 0x0000ff)); + regmap_write(lt8713sx->regmap, 0xe065, 0x00); + regmap_write(lt8713sx->regmap, 0xe066, 0x30); + regmap_write(lt8713sx->regmap, 0xe067, 0x00); + regmap_write(lt8713sx->regmap, 0xe06b, 0x00); + regmap_write(lt8713sx->regmap, 0xe06c, 0x00); + regmap_write(lt8713sx->regmap, 0xe060, 0x01); + msleep(50); + regmap_write(lt8713sx->regmap, 0xe060, 0x00); +} + +static int lt8713sx_write_data(struct lt8713sx *lt8713sx, const u8 *data, u64 filesize) +{ + int page = 0, num = 0, i = 0, val; + + page = (filesize % LT8713SX_PAGE_SIZE) ? + ((filesize / LT8713SX_PAGE_SIZE) + 1) : (filesize / LT8713SX_PAGE_SIZE); + + dev_dbg(lt8713sx->dev, + "Writing to Sram=%u pages, total size = %llu bytes\n", page, filesize); + + for (num = 0; num < page; num++) { + dev_dbg(lt8713sx->dev, "page[%d]\n", num); + lt8713sx_i2c_to_sram(lt8713sx); + + for (i = 0; i < LT8713SX_PAGE_SIZE; i++) { + if ((num * LT8713SX_PAGE_SIZE + i) < filesize) + val = *(data + (num * LT8713SX_PAGE_SIZE + i)); + else + val = 0xff; + regmap_write(lt8713sx->regmap, 0xe059, val); + } + + lt8713sx_wren(lt8713sx); + lt8713sx_sram_to_flash(lt8713sx); + } + + lt8713sx_wrdi(lt8713sx); + lt8713sx_disable_sram_write(lt8713sx); + + return 0; +} + +static void lt8713sx_main_upgrade_result(struct lt8713sx *lt8713sx) +{ + u32 main_crc_result; + + regmap_read(lt8713sx->regmap, 0xe023, &main_crc_result); + + dev_dbg(lt8713sx->dev, "Main CRC HW: 0x%02X\n", main_crc_result); + dev_dbg(lt8713sx->dev, "Main CRC FW: 0x%02X\n", lt8713sx->main_crc_value); + + if (main_crc_result == lt8713sx->main_crc_value) + dev_dbg(lt8713sx->dev, "Main Firmware Upgrade Success.\n"); + else + dev_err(lt8713sx->dev, "Main Firmware Upgrade Failed.\n"); +} + +static void lt8713sx_bank_upgrade_result(struct lt8713sx *lt8713sx, u8 banknum) +{ + u32 bank_crc_result; + + regmap_read(lt8713sx->regmap, 0xe023, &bank_crc_result); + + dev_dbg(lt8713sx->dev, "Bank %d CRC Result: 0x%02X\n", banknum, bank_crc_result); + + if (bank_crc_result == lt8713sx->bank_crc_value[banknum]) + dev_dbg(lt8713sx->dev, "Bank %d Firmware Upgrade Success.\n", banknum); + else + dev_err(lt8713sx->dev, "Bank %d Firmware Upgrade Failed.\n", banknum); +} + +static void lt8713sx_bank_result_check(struct lt8713sx *lt8713sx) +{ + int i; + u64 addr = 0x010000; + + for (i = 0; i < lt8713sx->bank_num; i++) { + lt8713sx_load_bank_fw_to_sram(lt8713sx, addr); + lt8713sx_bank_upgrade_result(lt8713sx, i); + addr += 0x3000; + } +} + +static int lt8713sx_firmware_upgrade(struct lt8713sx *lt8713sx) +{ + int ret; + + lt8713sx_config_parameters(lt8713sx); + + lt8713sx_block_erase(lt8713sx); + + if (lt8713sx->fw->size < SZ_64K) { + ret = lt8713sx_write_data(lt8713sx, lt8713sx->fw_buffer, SZ_64K); + if (ret < 0) { + dev_err(lt8713sx->dev, "Failed to write firmware data: %d\n", ret); + return ret; + } + } else { + ret = lt8713sx_write_data(lt8713sx, lt8713sx->fw_buffer, lt8713sx->fw->size); + if (ret < 0) { + dev_err(lt8713sx->dev, "Failed to write firmware data: %d\n", ret); + return ret; + } + } + dev_dbg(lt8713sx->dev, "Write Data done.\n"); + + return 0; +} + +static int lt8713sx_firmware_update(struct lt8713sx *lt8713sx) +{ + int ret = 0; + + mutex_lock(<8713sx->ocm_lock); + lt8713sx_i2c_enable(lt8713sx); + + ret = lt8713sx_prepare_firmware_data(lt8713sx); + if (ret < 0) { + dev_err(lt8713sx->dev, "Failed to prepare firmware data: %d\n", ret); + goto error; + } + + ret = lt8713sx_firmware_upgrade(lt8713sx); + if (ret < 0) { + dev_err(lt8713sx->dev, "Upgrade failure.\n"); + goto error; + } else { + /* Validate CRC */ + lt8713sx_load_main_fw_to_sram(lt8713sx); + lt8713sx_main_upgrade_result(lt8713sx); + lt8713sx_wrdi(lt8713sx); + lt8713sx_fifo_reset(lt8713sx); + lt8713sx_bank_result_check(lt8713sx); + lt8713sx_wrdi(lt8713sx); + } + +error: + lt8713sx_i2c_disable(lt8713sx); + if (!ret) + lt8713sx_reset(lt8713sx); + + kvfree(lt8713sx->fw_buffer); + lt8713sx->fw_buffer = NULL; + + if (lt8713sx->fw) { + release_firmware(lt8713sx->fw); + lt8713sx->fw = NULL; + } + mutex_unlock(<8713sx->ocm_lock); + + return ret; +} + +static void lt8713sx_reset(struct lt8713sx *lt8713sx) +{ + dev_dbg(lt8713sx->dev, "reset bridge.\n"); + gpiod_set_value_cansleep(lt8713sx->reset_gpio, 1); + msleep(20); + + gpiod_set_value_cansleep(lt8713sx->reset_gpio, 0); + msleep(20); + + dev_dbg(lt8713sx->dev, "reset done.\n"); +} + +static int lt8713sx_regulator_enable(struct lt8713sx *lt8713sx) +{ + int ret; + + ret = devm_regulator_get_enable(lt8713sx->dev, "vdd"); + if (ret < 0) + return dev_err_probe(lt8713sx->dev, ret, "failed to enable vdd regulator\n"); + + usleep_range(1000, 10000); + + ret = devm_regulator_get_enable(lt8713sx->dev, "vcc"); + if (ret < 0) + return dev_err_probe(lt8713sx->dev, ret, "failed to enable vcc regulator\n"); + return 0; +} + +static int lt8713sx_bridge_attach(struct drm_bridge *bridge, + struct drm_encoder *encoder, + enum drm_bridge_attach_flags flags) +{ + struct lt8713sx *lt8713sx = container_of(bridge, struct lt8713sx, bridge); + int i, ret; + + for (i = 0; i < lt8713sx->num_outputs; i++) { + if (!lt8713sx->next_bridge[i]) + continue; + + ret = drm_bridge_attach(encoder, + lt8713sx->next_bridge[i], + bridge, flags); + if (ret) + return ret; + } + + return 0; +} + +static int lt8713sx_get_ports(struct lt8713sx *lt8713sx) +{ + struct device *dev = lt8713sx->dev; + struct device_node *port, *ports, *ep, *remote; + int i = 0; + u32 reg; + + ports = of_get_child_by_name(dev->of_node, "ports"); + if (!ports) + return -ENODEV; + + for_each_child_of_node(ports, port) { + if (of_property_read_u32(port, "reg", ®)) + continue; + + if (reg == 0) + continue; + + if (i >= ARRAY_SIZE(lt8713sx->next_bridge)) { + of_node_put(port); + break; + } + + ep = of_graph_get_next_endpoint(port, NULL); + if (!ep) + continue; + + remote = of_graph_get_remote_port_parent(ep); + of_node_put(ep); + + if (!remote) + continue; + + lt8713sx->next_bridge[i] = of_drm_find_bridge(remote); + of_node_put(remote); + if (lt8713sx->next_bridge[i]) + i++; + } + lt8713sx->num_outputs = i; + dev_dbg(dev, "Enabled %d output ports", i); + + of_node_put(ports); + return 0; +}; + +static int lt8713sx_gpio_init(struct lt8713sx *lt8713sx) +{ + struct device *dev = lt8713sx->dev; + + lt8713sx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH); + if (IS_ERR(lt8713sx->reset_gpio)) + return dev_err_probe(dev, PTR_ERR(lt8713sx->reset_gpio), + "failed to acquire reset gpio\n"); + + /* power enable gpio */ + lt8713sx->enable_gpio = devm_gpiod_get_optional(dev, "enable", GPIOD_OUT_HIGH); + if (IS_ERR(lt8713sx->enable_gpio)) + return dev_err_probe(dev, PTR_ERR(lt8713sx->enable_gpio), + "failed to acquire enable gpio\n"); + return 0; +} + +static ssize_t lt8713sx_firmware_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t len) +{ + struct lt8713sx *lt8713sx = dev_get_drvdata(dev); + int ret; + + ret = lt8713sx_firmware_update(lt8713sx); + if (ret < 0) + return ret; + return len; +} + +static DEVICE_ATTR_WO(lt8713sx_firmware); + +static struct attribute *lt8713sx_attrs[] = { + &dev_attr_lt8713sx_firmware.attr, + NULL, +}; + +static const struct attribute_group lt8713sx_attr_group = { + .attrs = lt8713sx_attrs, +}; + +static const struct attribute_group *lt8713sx_attr_groups[] = { + <8713sx_attr_group, + NULL, +}; + +static const struct drm_bridge_funcs lt8713sx_bridge_funcs = { + .attach = lt8713sx_bridge_attach, +}; + +static int lt8713sx_probe(struct i2c_client *client) +{ + struct lt8713sx *lt8713sx; + struct device *dev = &client->dev; + int ret; + + if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) + return dev_err_probe(dev, -ENODEV, "device doesn't support I2C\n"); + + lt8713sx = devm_drm_bridge_alloc(dev, struct lt8713sx, bridge, <8713sx_bridge_funcs); + if (IS_ERR(lt8713sx)) + return PTR_ERR(lt8713sx); + + lt8713sx->dev = dev; + lt8713sx->client = client; + i2c_set_clientdata(client, lt8713sx); + + ret = devm_mutex_init(lt8713sx->dev, <8713sx->ocm_lock); + if (ret) + return ret; + + lt8713sx->regmap = devm_regmap_init_i2c(client, <8713sx_regmap_config); + if (IS_ERR(lt8713sx->regmap)) + return dev_err_probe(dev, PTR_ERR(lt8713sx->regmap), "regmap i2c init failed\n"); + + ret = lt8713sx_get_ports(lt8713sx); + if (ret < 0) + return ret; + + ret = lt8713sx_gpio_init(lt8713sx); + if (ret < 0) + return ret; + + ret = lt8713sx_regulator_enable(lt8713sx); + if (ret) + return ret; + + lt8713sx_reset(lt8713sx); + + lt8713sx->bridge.funcs = <8713sx_bridge_funcs; + lt8713sx->bridge.of_node = dev->of_node; + lt8713sx->bridge.type = DRM_MODE_CONNECTOR_DisplayPort; + drm_bridge_add(<8713sx->bridge); + + crc8_populate_msb(lt8713sx_crc_table, 0x31); + + return 0; +} + +static void lt8713sx_remove(struct i2c_client *client) +{ + struct lt8713sx *lt8713sx = i2c_get_clientdata(client); + + drm_bridge_remove(<8713sx->bridge); +} + +static struct i2c_device_id lt8713sx_id[] = { + { "lontium,lt8713sx", 0 }, + { /* sentinel */ } +}; + +static const struct of_device_id lt8713sx_match_table[] = { + { .compatible = "lontium,lt8713sx" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, lt8713sx_match_table); + +static struct i2c_driver lt8713sx_driver = { + .driver = { + .name = "lt8713sx", + .of_match_table = lt8713sx_match_table, + .dev_groups = lt8713sx_attr_groups, + }, + .probe = lt8713sx_probe, + .remove = lt8713sx_remove, + .id_table = lt8713sx_id, +}; + +module_i2c_driver(lt8713sx_driver); +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("lt8713sx drm bridge driver"); +MODULE_AUTHOR("Tony <[email protected]>"); +MODULE_FIRMWARE(FW_FILE); -- 2.34.1
