From 2142e0c34c8e10bacece4c06449b6a87d60fed7b Mon Sep 17 00:00:00 2001 From: Wenjun Zhang Date: Mon, 28 Oct 2019 15:41:08 +0800 Subject: [PATCH] drm/bridge: LT9611UXC: add LT9611UXC driver for HDK8250 Add LT9611UXC driver for HDK8250. Change-Id: Iec2d592f8ce2a2ede28fc23d7d250f5d356191c3 Signed-off-by: Wenjun Zhang --- drivers/gpu/drm/bridge/Kconfig | 12 + drivers/gpu/drm/bridge/Makefile | 1 + drivers/gpu/drm/bridge/lt9611uxc.c | 1771 ++++++++++++++++++++++++++++ 3 files changed, 1784 insertions(+) create mode 100644 drivers/gpu/drm/bridge/lt9611uxc.c diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig index 7a3e5a8f6439..7683f45f7192 100644 --- a/drivers/gpu/drm/bridge/Kconfig +++ b/drivers/gpu/drm/bridge/Kconfig @@ -129,6 +129,18 @@ config DRM_TI_TFP410 ---help--- Texas Instruments TFP410 DVI/HDMI Transmitter driver +config DRM_LONTIUM_LT9611UXC + bool "LT LT9611 DSI/HDMI Bridge" + depends on OF + select DRM_KMS_HELPER + select REGMAP_I2C + select DRM_MIPI_DSI + help + Say Y here if you want support for the HDMI interface. + It is Lontium Semiconductor DSI/HDMI Transmitter driver. + This only need to uploade firmware and do not need add + too much other configs when running. + source "drivers/gpu/drm/bridge/analogix/Kconfig" source "drivers/gpu/drm/bridge/adv7511/Kconfig" diff --git a/drivers/gpu/drm/bridge/Makefile b/drivers/gpu/drm/bridge/Makefile index 35f88d48ec20..32ab583b53f2 100644 --- a/drivers/gpu/drm/bridge/Makefile +++ b/drivers/gpu/drm/bridge/Makefile @@ -14,4 +14,5 @@ obj-$(CONFIG_DRM_TOSHIBA_TC358767) += tc358767.o obj-$(CONFIG_DRM_ANALOGIX_DP) += analogix/ obj-$(CONFIG_DRM_I2C_ADV7511) += adv7511/ obj-$(CONFIG_DRM_TI_TFP410) += ti-tfp410.o +obj-$(CONFIG_DRM_LONTIUM_LT9611UXC) += lt9611uxc.o obj-y += synopsys/ diff --git a/drivers/gpu/drm/bridge/lt9611uxc.c b/drivers/gpu/drm/bridge/lt9611uxc.c new file mode 100644 index 000000000000..cbe9572943da --- /dev/null +++ b/drivers/gpu/drm/bridge/lt9611uxc.c @@ -0,0 +1,1771 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2019, The Linux Foundation. All rights reserved. + */ + +#define pr_fmt(fmt) "%s: " fmt, __func__ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define CFG_HPD_INTERRUPTS BIT(0) +#define CFG_EDID_INTERRUPTS BIT(1) +#define CFG_CEC_INTERRUPTS BIT(2) +#define CFG_VID_CHK_INTERRUPTS BIT(3) + +#define EDID_SEG_SIZE 256 +#define READ_BUF_MAX_SIZE 64 +#define WRITE_BUF_MAX_SIZE 64 +#define HPD_UEVENT_BUFFER_SIZE 30 +#define VERSION_NUM 0x32 + +struct lt9611_reg_cfg { + u8 reg; + u8 val; +}; + +enum lt9611_fw_upgrade_status { + UPDATE_SUCCESS = 0, + UPDATE_RUNNING = 1, + UPDATE_FAILED = 2, +}; + +struct lt9611_vreg { + struct regulator *vreg; /* vreg handle */ + char vreg_name[32]; + int min_voltage; + int max_voltage; + int enable_load; + int disable_load; + int pre_on_sleep; + int post_on_sleep; + int pre_off_sleep; + int post_off_sleep; +}; + +struct lt9611_video_cfg { + u32 h_active; + u32 h_front_porch; + u32 h_pulse_width; + u32 h_back_porch; + bool h_polarity; + u32 v_active; + u32 v_front_porch; + u32 v_pulse_width; + u32 v_back_porch; + bool v_polarity; + u32 pclk_khz; + bool interlaced; + u32 vic; + enum hdmi_picture_aspect ar; + u32 num_of_lanes; + u32 num_of_intfs; + u8 scaninfo; +}; + +struct lt9611 { + struct device *dev; + struct drm_bridge bridge; + + struct device_node *host_node; + struct mipi_dsi_device *dsi; + struct drm_connector connector; + + u8 i2c_addr; + int irq; + bool ac_mode; + + u32 irq_gpio; + u32 reset_gpio; + u32 hdmi_ps_gpio; + u32 hdmi_en_gpio; + + unsigned int num_vreg; + struct lt9611_vreg *vreg_config; + + struct i2c_client *i2c_client; + + enum drm_connector_status status; + bool power_on; + + /* get display modes from device tree */ + bool non_pluggable; + u32 num_of_modes; + struct list_head mode_list; + + struct drm_display_mode curr_mode; + struct lt9611_video_cfg video_cfg; + + u8 edid_buf[EDID_SEG_SIZE]; + u8 i2c_wbuf[WRITE_BUF_MAX_SIZE]; + u8 i2c_rbuf[READ_BUF_MAX_SIZE]; + bool hdmi_mode; + enum lt9611_fw_upgrade_status fw_status; +}; + +struct lt9611_timing_info { + u16 xres; + u16 yres; + u8 bpp; + u8 fps; + u8 lanes; + u8 intfs; +}; + +static struct lt9611_timing_info lt9611_supp_timing_cfg[] = { + {3840, 2160, 24, 30, 4, 2}, /* 3840x2160 24bit 30Hz 4Lane 2ports */ + {1920, 1080, 24, 60, 4, 1}, /* 1080P 24bit 60Hz 4lane 1port */ + {1920, 1080, 24, 30, 3, 1}, /* 1080P 24bit 30Hz 3lane 1port */ + {1920, 1080, 24, 24, 3, 1}, + {720, 480, 24, 60, 2, 1}, + {720, 576, 24, 50, 2, 1}, + {640, 480, 24, 60, 2, 1}, + {0xffff, 0xffff, 0xff, 0xff, 0xff}, +}; + +static struct lt9611 *bridge_to_lt9611(struct drm_bridge *bridge) +{ + return container_of(bridge, struct lt9611, bridge); +} + +static struct lt9611 *connector_to_lt9611(struct drm_connector *connector) +{ + return container_of(connector, struct lt9611, connector); +} + +/* + * Write one reg with more values; + * Reg -> value0, value1, value2. + */ + +static int lt9611_write(struct lt9611 *pdata, u8 reg, + const u8 *buf, int size) +{ + struct i2c_client *client = pdata->i2c_client; + struct i2c_msg msg = { + .addr = client->addr, + .flags = 0, + .len = size + 1, + .buf = pdata->i2c_wbuf, + }; + + pdata->i2c_wbuf[0] = reg; + if (size > (WRITE_BUF_MAX_SIZE - 1)) { + pr_err("invalid write buffer size %d\n", size); + return -EINVAL; + } + + memcpy(pdata->i2c_wbuf + 1, buf, size); + + if (i2c_transfer(client->adapter, &msg, 1) < 1) { + pr_err("i2c write failed\n"); + return -EIO; + } + + return 0; +} + +/* + * Write one reg with one value; + * Reg -> value + */ +static int lt9611_write_byte(struct lt9611 *pdata, const u8 reg, u8 value) +{ + struct i2c_client *client = pdata->i2c_client; + struct i2c_msg msg = { + .addr = client->addr, + .flags = 0, + .len = 2, + .buf = pdata->i2c_wbuf, + }; + + memset(pdata->i2c_wbuf, 0, WRITE_BUF_MAX_SIZE); + pdata->i2c_wbuf[0] = reg; + pdata->i2c_wbuf[1] = value; + + if (i2c_transfer(client->adapter, &msg, 1) < 1) { + pr_err("i2c write failed\n"); + return -EIO; + } + + return 0; +} + +/* + * Write more regs with more values; + * Reg1 -> value1 + * Reg2 -> value2 + */ +static void lt9611_write_array(struct lt9611 *pdata, + struct lt9611_reg_cfg *reg_arry, int size) +{ + int i = 0; + + for (i = 0; i < size; i++) + lt9611_write_byte(pdata, reg_arry[i].reg, reg_arry[i].val); +} + +static int lt9611_read(struct lt9611 *pdata, u8 reg, char *buf, u32 size) +{ + struct i2c_client *client = pdata->i2c_client; + struct i2c_msg msg[2] = { + { + .addr = client->addr, + .flags = 0, + .len = 1, + .buf = pdata->i2c_wbuf, + }, + { + .addr = client->addr, + .flags = I2C_M_RD, + .len = size, + .buf = pdata->i2c_rbuf, + } + }; + + memset(pdata->i2c_wbuf, 0x0, WRITE_BUF_MAX_SIZE); + memset(pdata->i2c_rbuf, 0x0, READ_BUF_MAX_SIZE); + pdata->i2c_wbuf[0] = reg; + + if (i2c_transfer(client->adapter, msg, 2) != 2) { + pr_err("i2c read failed\n"); + return -EIO; + } + + memcpy(buf, pdata->i2c_rbuf, size); + + return 0; +} + +void lt9611_config(struct lt9611 *pdata) +{ + struct lt9611_reg_cfg reg_cfg[] = { + {0xFF, 0x80}, + {0xEE, 0x01}, + {0x5E, 0xDF}, + {0x58, 0x00}, + {0x59, 0x50}, + {0x5A, 0x10}, + {0x5A, 0x00}, + }; + + lt9611_write_array(pdata, reg_cfg, ARRAY_SIZE(reg_cfg)); +} + +u8 lt9611_get_version(struct lt9611 *pdata) +{ + u8 revison = 0; + + lt9611_write_byte(pdata, 0xFF, 0x80); + lt9611_write_byte(pdata, 0xEE, 0x01); + lt9611_write_byte(pdata, 0xFF, 0xB0); + + if (!lt9611_read(pdata, 0x21, &revison, 1)) + pr_info("LT9611 revison: 0x%x\n", revison); + else + pr_err("LT9611 get revison failed\n"); + + lt9611_write_byte(pdata, 0xFF, 0x80); + lt9611_write_byte(pdata, 0xEE, 0x00); + + return revison; +} + +void lt9611_flash_write_en(struct lt9611 *pdata) +{ + struct lt9611_reg_cfg reg_cfg0[] = { + {0xFF, 0x81}, + {0x08, 0xBF}, + }; + + struct lt9611_reg_cfg reg_cfg1[] = { + {0xFF, 0x80}, + {0x5A, 0x04}, + {0x5A, 0x00}, + }; + + lt9611_write_array(pdata, reg_cfg0, ARRAY_SIZE(reg_cfg0)); + msleep(20); + lt9611_write_byte(pdata, 0x08, 0xFF); + msleep(20); + lt9611_write_array(pdata, reg_cfg1, ARRAY_SIZE(reg_cfg1)); +} + +void lt9611_block_erase(struct lt9611 *pdata) +{ + struct lt9611_reg_cfg reg_cfg[] = { + {0xFF, 0x80}, + {0xEE, 0x01}, + {0x5A, 0x04}, + {0x5A, 0x00}, + {0x5B, 0x00}, + {0x5C, 0x00}, + {0x5D, 0x00}, + {0x5A, 0x01}, + {0x5A, 0x00}, + }; + + pr_info("LT9611 block erase\n"); + lt9611_write_array(pdata, reg_cfg, ARRAY_SIZE(reg_cfg)); + msleep(3000); +} + +void lt9611_flash_read_addr_set(struct lt9611 *pdata, u32 addr) +{ + struct lt9611_reg_cfg reg_cfg[] = { + {0x5E, 0x5F}, + {0x5A, 0xA0}, + {0x5A, 0x80}, + {0x5B, (addr & 0xFF0000) >> 16}, + {0x5C, (addr & 0xFF00) >> 8}, + {0x5D, addr & 0xFF}, + {0x5A, 0x90}, + {0x5A, 0x80}, + {0x58, 0x21}, + }; + + lt9611_write_array(pdata, reg_cfg, ARRAY_SIZE(reg_cfg)); +} + +void lt9611_fw_read_back(struct lt9611 *pdata, u8 *buff, int size) +{ + u8 page_data[32]; + int page_number = 0, i = 0, addr = 0; + + struct lt9611_reg_cfg reg_cfg[] = { + {0xFF, 0x80}, + {0xEE, 0x01}, + {0x5A, 0x84}, + {0x5A, 0x80}, + }; + /* + * Read 32 bytes once. + */ + page_number = size / 32; + if (size % 32) + page_number++; + + lt9611_write_array(pdata, reg_cfg, ARRAY_SIZE(reg_cfg)); + + for (i = 0; i < page_number; i++) { + memset(page_data, 0x0, 32); + lt9611_flash_read_addr_set(pdata, addr); + lt9611_read(pdata, 0x5F, page_data, 32); + memcpy(buff, page_data, 32); + buff += 32; + addr += 32; + } +} + +void lt9611_flash_write_config(struct lt9611 *pdata) +{ + struct lt9611_reg_cfg reg_cfg[] = { + {0xFF, 0x80}, + {0x5E, 0xDF}, + {0x5A, 0x20}, + {0x5A, 0x00}, + {0x58, 0x21}, + }; + + lt9611_flash_write_en(pdata); + lt9611_write_array(pdata, reg_cfg, ARRAY_SIZE(reg_cfg)); +} + +void lt9611_flash_write_addr_set(struct lt9611 *pdata, u32 addr) +{ + struct lt9611_reg_cfg reg_cfg[] = { + {0x5B, (addr & 0xFF0000) >> 16}, + {0x5C, (addr & 0xFF00) >> 8}, + {0x5D, addr & 0xFF}, + {0x5A, 0x10}, + {0x5A, 0x00}, + }; + + lt9611_write_array(pdata, reg_cfg, ARRAY_SIZE(reg_cfg)); +} + +void lt9611_firmware_write(struct lt9611 *pdata, const u8 *f_data, + int size) +{ + u8 last_buf[32]; + int i = 0, page_size = 32; + int start_addr = 0, total_page = 0, rest_data = 0; + + total_page = size / page_size; + rest_data = size % page_size; + + for (i = 0; i < total_page; i++) { + lt9611_flash_write_config(pdata); + lt9611_write(pdata, 0x59, f_data, page_size); + lt9611_flash_write_addr_set(pdata, start_addr); + start_addr += page_size; + f_data += page_size; + msleep(20); + } + + if (rest_data > 0) { + memset(last_buf, 0xFF, 32); + memcpy(last_buf, f_data, rest_data); + lt9611_flash_write_config(pdata); + lt9611_write(pdata, 0x59, last_buf, page_size); + + lt9611_flash_write_addr_set(pdata, start_addr); + msleep(20); + } + msleep(20); + + pr_info("LT9611 FW write over, total size: %d, page: %d, reset: %d\n", + size, total_page, rest_data); +} + +void lt9611_firmware_upgrade(struct lt9611 *pdata, + const struct firmware *cfg) +{ + int i = 0; + u8 *fw_read_data = NULL; + int data_len = (int)cfg->size; + + pr_info("LT9611 FW total size %d\n", data_len); + + fw_read_data = kzalloc(ALIGN(data_len, 32), GFP_KERNEL); + if (!fw_read_data) + return; + + pdata->fw_status = UPDATE_RUNNING; + lt9611_config(pdata); + + /* + * Need erase block 2 timess here. + * Sometimes, erase can fail. + * This is a workaroud. + */ + for (i = 0; i < 2; i++) + lt9611_block_erase(pdata); + + lt9611_firmware_write(pdata, cfg->data, data_len); + msleep(20); + lt9611_fw_read_back(pdata, fw_read_data, data_len); + + if (!memcmp(cfg->data, fw_read_data, data_len)) { + pdata->fw_status = UPDATE_SUCCESS; + pr_debug("LT9611 Firmware upgrade success.\n"); + } else { + pdata->fw_status = UPDATE_FAILED; + pr_err("LT9611 Firmware upgrade failed\n"); + } + + kfree(fw_read_data); +} + +static void lt9611_firmware_cb(const struct firmware *cfg, void *data) +{ + struct lt9611 *pdata = (struct lt9611 *)data; + + if (!cfg) { + pr_err("LT9611 get firmware failed\n"); + return; + } + + lt9611_firmware_upgrade(pdata, cfg); + release_firmware(cfg); +} + +static int lt9611_parse_dt_modes(struct device_node *np, + struct list_head *head, + u32 *num_of_modes) +{ + int rc = 0; + struct drm_display_mode *mode; + u32 mode_count = 0; + struct device_node *node = NULL; + struct device_node *root_node = NULL; + u32 h_front_porch, h_pulse_width, h_back_porch; + u32 v_front_porch, v_pulse_width, v_back_porch; + bool h_active_high, v_active_high; + u32 flags = 0; + + root_node = of_get_child_by_name(np, "lt,customize-modes"); + if (!root_node) { + root_node = of_parse_phandle(np, "lt,customize-modes", 0); + if (!root_node) { + pr_info("No entry present for lt,customize-modes\n"); + goto end; + } + } + + for_each_child_of_node(root_node, node) { + rc = 0; + mode = kzalloc(sizeof(*mode), GFP_KERNEL); + if (!mode) { + pr_err("Out of memory\n"); + rc = -ENOMEM; + continue; + } + + rc = of_property_read_u32(node, "lt,mode-h-active", + &mode->hdisplay); + if (rc) { + pr_err("failed to read h-active, rc=%d\n", rc); + goto fail; + } + + rc = of_property_read_u32(node, "lt,mode-h-front-porch", + &h_front_porch); + if (rc) { + pr_err("failed to read h-front-porch, rc=%d\n", rc); + goto fail; + } + + rc = of_property_read_u32(node, "lt,mode-h-pulse-width", + &h_pulse_width); + if (rc) { + pr_err("failed to read h-pulse-width, rc=%d\n", rc); + goto fail; + } + + rc = of_property_read_u32(node, "lt,mode-h-back-porch", + &h_back_porch); + if (rc) { + pr_err("failed to read h-back-porch, rc=%d\n", rc); + goto fail; + } + + h_active_high = of_property_read_bool(node, + "lt,mode-h-active-high"); + + rc = of_property_read_u32(node, "lt,mode-v-active", + &mode->vdisplay); + if (rc) { + pr_err("failed to read v-active, rc=%d\n", rc); + goto fail; + } + + rc = of_property_read_u32(node, "lt,mode-v-front-porch", + &v_front_porch); + if (rc) { + pr_err("failed to read v-front-porch, rc=%d\n", rc); + goto fail; + } + + rc = of_property_read_u32(node, "lt,mode-v-pulse-width", + &v_pulse_width); + if (rc) { + pr_err("failed to read v-pulse-width, rc=%d\n", rc); + goto fail; + } + + rc = of_property_read_u32(node, "lt,mode-v-back-porch", + &v_back_porch); + if (rc) { + pr_err("failed to read v-back-porch, rc=%d\n", rc); + goto fail; + } + + v_active_high = of_property_read_bool(node, + "lt,mode-v-active-high"); + + rc = of_property_read_u32(node, "lt,mode-refresh-rate", + &mode->vrefresh); + if (rc) { + pr_err("failed to read refresh-rate, rc=%d\n", rc); + goto fail; + } + + rc = of_property_read_u32(node, "lt,mode-clock-in-khz", + &mode->clock); + if (rc) { + pr_err("failed to read clock, rc=%d\n", rc); + goto fail; + } + + mode->hsync_start = mode->hdisplay + h_front_porch; + mode->hsync_end = mode->hsync_start + h_pulse_width; + mode->htotal = mode->hsync_end + h_back_porch; + mode->vsync_start = mode->vdisplay + v_front_porch; + mode->vsync_end = mode->vsync_start + v_pulse_width; + mode->vtotal = mode->vsync_end + v_back_porch; + if (h_active_high) + flags |= DRM_MODE_FLAG_PHSYNC; + else + flags |= DRM_MODE_FLAG_NHSYNC; + if (v_active_high) + flags |= DRM_MODE_FLAG_PVSYNC; + else + flags |= DRM_MODE_FLAG_NVSYNC; + mode->flags = flags; + + if (!rc) { + mode_count++; + list_add_tail(&mode->head, head); + } + + drm_mode_set_name(mode); + + pr_debug("mode[%s] h[%d,%d,%d,%d] v[%d,%d,%d,%d] %d %x %dkHZ\n", + mode->name, mode->hdisplay, mode->hsync_start, + mode->hsync_end, mode->htotal, mode->vdisplay, + mode->vsync_start, mode->vsync_end, mode->vtotal, + mode->vrefresh, mode->flags, mode->clock); +fail: + if (rc) { + kfree(mode); + continue; + } + } + + if (num_of_modes) + *num_of_modes = mode_count; + +end: + return rc; +} + + +static int lt9611_parse_dt(struct device *dev, + struct lt9611 *pdata) +{ + struct device_node *np = dev->of_node; + struct device_node *end_node; + int ret = 0; + + end_node = of_graph_get_endpoint_by_regs(dev->of_node, 0, 0); + if (!end_node) { + pr_err("remote endpoint not found\n"); + return -ENODEV; + } + + pdata->host_node = of_graph_get_remote_port_parent(end_node); + of_node_put(end_node); + if (!pdata->host_node) { + pr_err("remote node not found\n"); + return -ENODEV; + } + of_node_put(pdata->host_node); + + pdata->irq_gpio = + of_get_named_gpio(np, "lt,irq-gpio", 0); + if (!gpio_is_valid(pdata->irq_gpio)) { + pr_err("irq gpio not specified\n"); + ret = -EINVAL; + } + pr_debug("irq_gpio=%d\n", pdata->irq_gpio); + + pdata->reset_gpio = + of_get_named_gpio(np, "lt,reset-gpio", 0); + if (!gpio_is_valid(pdata->reset_gpio)) { + pr_err("reset gpio not specified\n"); + ret = -EINVAL; + } + pr_debug("reset_gpio=%d\n", pdata->reset_gpio); + + pdata->hdmi_ps_gpio = + of_get_named_gpio(np, "lt,hdmi-ps-gpio", 0); + if (!gpio_is_valid(pdata->hdmi_ps_gpio)) + pr_debug("hdmi ps gpio not specified\n"); + else + pr_debug("hdmi_ps_gpio=%d\n", pdata->hdmi_ps_gpio); + + pdata->hdmi_en_gpio = + of_get_named_gpio(np, "lt,hdmi-en-gpio", 0); + if (!gpio_is_valid(pdata->hdmi_en_gpio)) + pr_debug("hdmi en gpio not specified\n"); + else + pr_debug("hdmi_en_gpio=%d\n", pdata->hdmi_en_gpio); + + pdata->ac_mode = of_property_read_bool(np, "lt,ac-mode"); + pr_debug("ac_mode=%d\n", pdata->ac_mode); + + pdata->non_pluggable = of_property_read_bool(np, "lt,non-pluggable"); + pr_debug("non_pluggable = %d\n", pdata->non_pluggable); + if (pdata->non_pluggable) { + INIT_LIST_HEAD(&pdata->mode_list); + ret = lt9611_parse_dt_modes(np, + &pdata->mode_list, &pdata->num_of_modes); + } + + return ret; +} + +static int lt9611_gpio_configure(struct lt9611 *pdata, bool on) +{ + int ret = 0; + + if (on) { + ret = gpio_request(pdata->reset_gpio, + "lt9611-reset-gpio"); + if (ret) { + pr_err("lt9611 reset gpio request failed\n"); + goto error; + } + + ret = gpio_direction_output(pdata->reset_gpio, 0); + if (ret) { + pr_err("lt9611 reset gpio direction failed\n"); + goto reset_error; + } + + if (gpio_is_valid(pdata->hdmi_en_gpio)) { + ret = gpio_request(pdata->hdmi_en_gpio, + "lt9611-hdmi-en-gpio"); + if (ret) { + pr_err("lt9611 hdmi en gpio request failed\n"); + goto reset_error; + } + + ret = gpio_direction_output(pdata->hdmi_en_gpio, 1); + if (ret) { + pr_err("lt9611 hdmi en gpio direction failed\n"); + goto hdmi_en_error; + } + } + + if (gpio_is_valid(pdata->hdmi_ps_gpio)) { + ret = gpio_request(pdata->hdmi_ps_gpio, + "lt9611-hdmi-ps-gpio"); + if (ret) { + pr_err("lt9611 hdmi ps gpio request failed\n"); + goto hdmi_en_error; + } + + ret = gpio_direction_input(pdata->hdmi_ps_gpio); + if (ret) { + pr_err("lt9611 hdmi ps gpio direction failed\n"); + goto hdmi_ps_error; + } + } + + ret = gpio_request(pdata->irq_gpio, "lt9611-irq-gpio"); + if (ret) { + pr_err("lt9611 irq gpio request failed\n"); + goto hdmi_ps_error; + } + + ret = gpio_direction_input(pdata->irq_gpio); + if (ret) { + pr_err("lt9611 irq gpio direction failed\n"); + goto irq_error; + } + } else { + gpio_free(pdata->irq_gpio); + if (gpio_is_valid(pdata->hdmi_ps_gpio)) + gpio_free(pdata->hdmi_ps_gpio); + if (gpio_is_valid(pdata->hdmi_en_gpio)) + gpio_free(pdata->hdmi_en_gpio); + gpio_free(pdata->reset_gpio); + } + + return ret; + + +irq_error: + gpio_free(pdata->irq_gpio); +hdmi_ps_error: + if (gpio_is_valid(pdata->hdmi_ps_gpio)) + gpio_free(pdata->hdmi_ps_gpio); +hdmi_en_error: + if (gpio_is_valid(pdata->hdmi_en_gpio)) + gpio_free(pdata->hdmi_en_gpio); +reset_error: + gpio_free(pdata->reset_gpio); +error: + return ret; +} + +static int lt9611_read_device_id(struct lt9611 *pdata) +{ + u8 rev0 = 0, rev1 = 0; + int ret = 0; + + lt9611_write_byte(pdata, 0xFF, 0x80); + lt9611_write_byte(pdata, 0xEE, 0x01); + lt9611_write_byte(pdata, 0xFF, 0x81); + + if (!lt9611_read(pdata, 0x00, &rev0, 1) && + !lt9611_read(pdata, 0x01, &rev1, 1)) { + pr_info("LT9611 id: 0x%x\n", (rev0 << 8) | rev1); + } else { + pr_err("LT9611 get id failed\n"); + ret = -1; + } + + lt9611_write_byte(pdata, 0xFF, 0x80); + lt9611_write_byte(pdata, 0xEE, 0x00); + + return ret; +} + +static irqreturn_t lt9611_irq_thread_handler(int irq, void *dev_id) +{ + pr_debug("irq_thread_handler\n"); + return IRQ_HANDLED; +} + +static void lt9611_reset(struct lt9611 *pdata, bool on_off) +{ + pr_debug("reset: %d\n", on_off); + if (on_off) { + gpio_set_value(pdata->reset_gpio, 1); + msleep(20); + gpio_set_value(pdata->reset_gpio, 0); + msleep(20); + gpio_set_value(pdata->reset_gpio, 1); + msleep(20); + } else { + gpio_set_value(pdata->reset_gpio, 0); + } +} + +static void lt9611_assert_5v(struct lt9611 *pdata) +{ + if (gpio_is_valid(pdata->hdmi_en_gpio)) { + gpio_set_value(pdata->hdmi_en_gpio, 1); + msleep(20); + } +} + +static int lt9611_config_vreg(struct device *dev, + struct lt9611_vreg *in_vreg, int num_vreg, bool config) +{ + int i = 0, rc = 0; + struct lt9611_vreg *curr_vreg = NULL; + + if (!in_vreg || !num_vreg) + return rc; + + if (config) { + for (i = 0; i < num_vreg; i++) { + curr_vreg = &in_vreg[i]; + curr_vreg->vreg = regulator_get(dev, + curr_vreg->vreg_name); + rc = PTR_RET(curr_vreg->vreg); + if (rc) { + pr_err("%s get failed. rc=%d\n", + curr_vreg->vreg_name, rc); + curr_vreg->vreg = NULL; + goto vreg_get_fail; + } + + rc = regulator_set_voltage( + curr_vreg->vreg, + curr_vreg->min_voltage, + curr_vreg->max_voltage); + if (rc < 0) { + pr_err("%s set vltg fail\n", + curr_vreg->vreg_name); + goto vreg_set_voltage_fail; + } + } + } else { + for (i = num_vreg-1; i >= 0; i--) { + curr_vreg = &in_vreg[i]; + if (curr_vreg->vreg) { + regulator_set_voltage(curr_vreg->vreg, + 0, curr_vreg->max_voltage); + + regulator_put(curr_vreg->vreg); + curr_vreg->vreg = NULL; + } + } + } + return 0; + +vreg_unconfig: + regulator_set_load(curr_vreg->vreg, 0); + +vreg_set_voltage_fail: + regulator_put(curr_vreg->vreg); + curr_vreg->vreg = NULL; + +vreg_get_fail: + for (i--; i >= 0; i--) { + curr_vreg = &in_vreg[i]; + goto vreg_unconfig; + } + return rc; +} + +static int lt9611_get_dt_supply(struct device *dev, + struct lt9611 *pdata) +{ + int i = 0, rc = 0; + u32 tmp = 0; + struct device_node *of_node = NULL, *supply_root_node = NULL; + struct device_node *supply_node = NULL; + + if (!dev || !pdata) { + pr_err("invalid input param dev:%pK pdata:%pK\n", dev, pdata); + return -EINVAL; + } + + of_node = dev->of_node; + + pdata->num_vreg = 0; + supply_root_node = of_get_child_by_name(of_node, + "lt,supply-entries"); + if (!supply_root_node) { + pr_info("no supply entry present\n"); + return 0; + } + + pdata->num_vreg = of_get_available_child_count(supply_root_node); + if (pdata->num_vreg == 0) { + pr_info("no vreg present\n"); + return 0; + } + + pr_debug("vreg found. count=%d\n", pdata->num_vreg); + pdata->vreg_config = devm_kzalloc(dev, sizeof(struct lt9611_vreg) * + pdata->num_vreg, GFP_KERNEL); + if (!pdata->vreg_config) + return -ENOMEM; + + for_each_available_child_of_node(supply_root_node, supply_node) { + const char *st = NULL; + + rc = of_property_read_string(supply_node, + "lt,supply-name", &st); + if (rc) { + pr_err("error reading name. rc=%d\n", rc); + goto error; + } + + strlcpy(pdata->vreg_config[i].vreg_name, st, + sizeof(pdata->vreg_config[i].vreg_name)); + + rc = of_property_read_u32(supply_node, + "lt,supply-min-voltage", &tmp); + if (rc) { + pr_err("error reading min volt. rc=%d\n", rc); + goto error; + } + pdata->vreg_config[i].min_voltage = tmp; + + rc = of_property_read_u32(supply_node, + "lt,supply-max-voltage", &tmp); + if (rc) { + pr_err("error reading max volt. rc=%d\n", rc); + goto error; + } + pdata->vreg_config[i].max_voltage = tmp; + + rc = of_property_read_u32(supply_node, + "lt,supply-enable-load", &tmp); + if (rc) + pr_debug("no supply enable load value. rc=%d\n", rc); + + pdata->vreg_config[i].enable_load = (!rc ? tmp : 0); + + rc = of_property_read_u32(supply_node, + "lt,supply-disable-load", &tmp); + if (rc) + pr_debug("no supply disable load value. rc=%d\n", rc); + + pdata->vreg_config[i].disable_load = (!rc ? tmp : 0); + + rc = of_property_read_u32(supply_node, + "lt,supply-pre-on-sleep", &tmp); + if (rc) + pr_debug("no supply pre on sleep value. rc=%d\n", rc); + + pdata->vreg_config[i].pre_on_sleep = (!rc ? tmp : 0); + + rc = of_property_read_u32(supply_node, + "lt,supply-pre-off-sleep", &tmp); + if (rc) + pr_debug("no supply pre off sleep value. rc=%d\n", rc); + + pdata->vreg_config[i].pre_off_sleep = (!rc ? tmp : 0); + + rc = of_property_read_u32(supply_node, + "lt,supply-post-on-sleep", &tmp); + if (rc) + pr_debug("no supply post on sleep value. rc=%d\n", rc); + + pdata->vreg_config[i].post_on_sleep = (!rc ? tmp : 0); + + rc = of_property_read_u32(supply_node, + "lt,supply-post-off-sleep", &tmp); + if (rc) + pr_debug("no supply post off sleep value. rc=%d\n", rc); + + pdata->vreg_config[i].post_off_sleep = (!rc ? tmp : 0); + + pr_debug("%s min=%d, max=%d, enable=%d, disable=%d\n", + pdata->vreg_config[i].vreg_name, + pdata->vreg_config[i].min_voltage, + pdata->vreg_config[i].max_voltage, + pdata->vreg_config[i].enable_load, + pdata->vreg_config[i].disable_load); + ++i; + + rc = 0; + } + + rc = lt9611_config_vreg(dev, + pdata->vreg_config, pdata->num_vreg, true); + if (rc) + goto error; + + return rc; + +error: + if (pdata->vreg_config) { + devm_kfree(dev, pdata->vreg_config); + pdata->vreg_config = NULL; + pdata->num_vreg = 0; + } + + return rc; +} + +static void lt9611_put_dt_supply(struct device *dev, + struct lt9611 *pdata) +{ + if (!dev || !pdata) { + pr_err("invalid input param dev:%pK pdata:%pK\n", dev, pdata); + return; + } + + lt9611_config_vreg(dev, + pdata->vreg_config, pdata->num_vreg, false); + + if (pdata->vreg_config) { + devm_kfree(dev, pdata->vreg_config); + pdata->vreg_config = NULL; + } + pdata->num_vreg = 0; +} + +static int lt9611_enable_vreg(struct lt9611 *pdata, int enable) +{ + int i = 0, rc = 0; + bool need_sleep; + struct lt9611_vreg *in_vreg = pdata->vreg_config; + int num_vreg = pdata->num_vreg; + + if (enable) { + for (i = 0; i < num_vreg; i++) { + rc = PTR_RET(in_vreg[i].vreg); + if (rc) { + pr_err("%s regulator error. rc=%d\n", + in_vreg[i].vreg_name, rc); + goto vreg_set_opt_mode_fail; + } + + need_sleep = !regulator_is_enabled(in_vreg[i].vreg); + if (in_vreg[i].pre_on_sleep && need_sleep) + usleep_range(in_vreg[i].pre_on_sleep * 1000, + in_vreg[i].pre_on_sleep * 1000); + + rc = regulator_set_load(in_vreg[i].vreg, + in_vreg[i].enable_load); + if (rc < 0) { + pr_err("%s set opt m fail\n", + in_vreg[i].vreg_name); + goto vreg_set_opt_mode_fail; + } + + rc = regulator_enable(in_vreg[i].vreg); + if (in_vreg[i].post_on_sleep && need_sleep) + usleep_range(in_vreg[i].post_on_sleep * 1000, + in_vreg[i].post_on_sleep * 1000); + if (rc < 0) { + pr_err("%s enable failed\n", + in_vreg[i].vreg_name); + goto disable_vreg; + } + } + } else { + for (i = num_vreg-1; i >= 0; i--) { + if (in_vreg[i].pre_off_sleep) + usleep_range(in_vreg[i].pre_off_sleep * 1000, + in_vreg[i].pre_off_sleep * 1000); + + regulator_set_load(in_vreg[i].vreg, + in_vreg[i].disable_load); + regulator_disable(in_vreg[i].vreg); + + if (in_vreg[i].post_off_sleep) + usleep_range(in_vreg[i].post_off_sleep * 1000, + in_vreg[i].post_off_sleep * 1000); + } + } + return rc; + +disable_vreg: + regulator_set_load(in_vreg[i].vreg, in_vreg[i].disable_load); + +vreg_set_opt_mode_fail: + for (i--; i >= 0; i--) { + if (in_vreg[i].pre_off_sleep) + usleep_range(in_vreg[i].pre_off_sleep * 1000, + in_vreg[i].pre_off_sleep * 1000); + + regulator_set_load(in_vreg[i].vreg, + in_vreg[i].disable_load); + regulator_disable(in_vreg[i].vreg); + + if (in_vreg[i].post_off_sleep) + usleep_range(in_vreg[i].post_off_sleep * 1000, + in_vreg[i].post_off_sleep * 1000); + } + + return rc; +} + +static struct lt9611_timing_info *lt9611_get_supported_timing( + struct drm_display_mode *mode) +{ + int i = 0; + + while (lt9611_supp_timing_cfg[i].xres != 0xffff) { + if (lt9611_supp_timing_cfg[i].xres == mode->hdisplay && + lt9611_supp_timing_cfg[i].yres == mode->vdisplay && + lt9611_supp_timing_cfg[i].fps == + drm_mode_vrefresh(mode)) { + return <9611_supp_timing_cfg[i]; + } + i++; + } + + return NULL; +} + +/* TODO: intf/lane number needs info from both DSI host and client */ +static int lt9611_get_intf_num(struct lt9611 *pdata, + struct drm_display_mode *mode) +{ + int num_of_intfs = 0; + struct lt9611_timing_info *timing = + lt9611_get_supported_timing(mode); + + if (timing) + num_of_intfs = timing->intfs; + else { + pr_err("interface number not defined by bridge chip\n"); + num_of_intfs = 0; + } + + return num_of_intfs; +} + +static int lt9611_get_lane_num(struct lt9611 *pdata, + struct drm_display_mode *mode) +{ + int num_of_lanes = 0; + struct lt9611_timing_info *timing = + lt9611_get_supported_timing(mode); + + if (timing) + num_of_lanes = timing->lanes; + else { + pr_err("lane number not defined by bridge chip\n"); + num_of_lanes = 0; + } + + return num_of_lanes; +} + +static void lt9611_get_video_cfg(struct lt9611 *pdata, + struct drm_display_mode *mode, + struct lt9611_video_cfg *video_cfg) +{ + int rc = 0; + struct hdmi_avi_infoframe avi_frame; + + memset(&avi_frame, 0, sizeof(avi_frame)); + + video_cfg->h_active = mode->hdisplay; + video_cfg->v_active = mode->vdisplay; + video_cfg->h_front_porch = mode->hsync_start - mode->hdisplay; + video_cfg->v_front_porch = mode->vsync_start - mode->vdisplay; + video_cfg->h_back_porch = mode->htotal - mode->hsync_end; + video_cfg->v_back_porch = mode->vtotal - mode->vsync_end; + video_cfg->h_pulse_width = mode->hsync_end - mode->hsync_start; + video_cfg->v_pulse_width = mode->vsync_end - mode->vsync_start; + video_cfg->pclk_khz = mode->clock; + + video_cfg->h_polarity = !!(mode->flags & DRM_MODE_FLAG_PHSYNC); + video_cfg->v_polarity = !!(mode->flags & DRM_MODE_FLAG_PVSYNC); + + video_cfg->num_of_lanes = lt9611_get_lane_num(pdata, mode); + video_cfg->num_of_intfs = lt9611_get_intf_num(pdata, mode); + + pr_debug("video=h[%d,%d,%d,%d] v[%d,%d,%d,%d] pclk=%d lane=%d intf=%d\n", + video_cfg->h_active, video_cfg->h_front_porch, + video_cfg->h_pulse_width, video_cfg->h_back_porch, + video_cfg->v_active, video_cfg->v_front_porch, + video_cfg->v_pulse_width, video_cfg->v_back_porch, + video_cfg->pclk_khz, video_cfg->num_of_lanes, + video_cfg->num_of_intfs); + + rc = drm_hdmi_avi_infoframe_from_display_mode(&avi_frame, mode, false); + if (rc) { + pr_err("get avi frame failed ret=%d\n", rc); + } else { + video_cfg->scaninfo = avi_frame.scan_mode; + video_cfg->ar = avi_frame.picture_aspect; + video_cfg->vic = avi_frame.video_code; + pr_debug("scaninfo=%d ar=%d vic=%d\n", + video_cfg->scaninfo, video_cfg->ar, video_cfg->vic); + } +} + +/* connector funcs */ +static enum drm_connector_status +lt9611_connector_detect(struct drm_connector *connector, bool force) +{ + struct lt9611 *pdata = connector_to_lt9611(connector); + pdata->status = connector_status_connected; + + return pdata->status; +} + +static int lt9611_read_edid(struct lt9611 *pdata) +{ + return 0; +} + +/* TODO: add support for more extension blocks */ +static int lt9611_get_edid_block(void *data, u8 *buf, unsigned int block, + size_t len) +{ + + pr_info("get edid block: block=%d, len=%d\n", block, (int)len); + + return 0; +} + +static void lt9611_set_preferred_mode(struct drm_connector *connector) +{ + struct lt9611 *pdata = connector_to_lt9611(connector); + struct drm_display_mode *mode; + const char *string; + + /* use specified mode as preferred */ + if (!of_property_read_string(pdata->dev->of_node, + "lt,preferred-mode", &string)) { + list_for_each_entry(mode, &connector->probed_modes, head) { + if (!strcmp(mode->name, string)) + mode->type |= DRM_MODE_TYPE_PREFERRED; + } + } +} + +static int lt9611_connector_get_modes(struct drm_connector *connector) +{ + struct lt9611 *pdata = connector_to_lt9611(connector); + struct drm_display_mode *mode, *m; + unsigned int count = 0; + + if (pdata->non_pluggable) { + list_for_each_entry(mode, &pdata->mode_list, head) { + m = drm_mode_duplicate(connector->dev, mode); + if (!m) { + pr_err("failed to add hdmi mode %dx%d\n", + mode->hdisplay, mode->vdisplay); + break; + } + drm_mode_probed_add(connector, m); + } + count = pdata->num_of_modes; + } else { + struct edid *edid; + + edid = drm_do_get_edid(connector, lt9611_get_edid_block, pdata); + + drm_connector_update_edid_property(connector, edid); + count = drm_add_edid_modes(connector, edid); + + pdata->hdmi_mode = drm_detect_hdmi_monitor(edid); + pr_info("hdmi_mode = %d\n", pdata->hdmi_mode); + + kfree(edid); + } + + lt9611_set_preferred_mode(connector); + + return count; +} + +static enum drm_mode_status lt9611_connector_mode_valid( + struct drm_connector *connector, struct drm_display_mode *mode) +{ + + struct lt9611_timing_info *timing = + lt9611_get_supported_timing(mode); + + return timing ? MODE_OK : MODE_BAD; +} + +/* bridge funcs */ +static void lt9611_bridge_enable(struct drm_bridge *bridge) +{ + pr_debug("bridge enable\n"); +} + +static void lt9611_bridge_disable(struct drm_bridge *bridge) +{ + pr_debug("bridge disable\n"); +} + +static void lt9611_bridge_mode_set(struct drm_bridge *bridge, + struct drm_display_mode *mode, + struct drm_display_mode *adj_mode) +{ + struct lt9611 *pdata = bridge_to_lt9611(bridge); + struct lt9611_video_cfg *video_cfg = &pdata->video_cfg; + int ret = 0; + + pr_debug(" hdisplay=%d, vdisplay=%d, vrefresh=%d, clock=%d\n", + adj_mode->hdisplay, adj_mode->vdisplay, + adj_mode->vrefresh, adj_mode->clock); + + drm_mode_copy(&pdata->curr_mode, adj_mode); + + memset(video_cfg, 0, sizeof(struct lt9611_video_cfg)); + lt9611_get_video_cfg(pdata, adj_mode, video_cfg); + + /* TODO: update intf number of host */ + if (video_cfg->num_of_lanes != pdata->dsi->lanes) { + mipi_dsi_detach(pdata->dsi); + pdata->dsi->lanes = video_cfg->num_of_lanes; + ret = mipi_dsi_attach(pdata->dsi); + if (ret) + pr_err("failed to change host lanes\n"); + } +} + +static const struct drm_connector_helper_funcs + lt9611_connector_helper_funcs = { + .get_modes = lt9611_connector_get_modes, + .mode_valid = lt9611_connector_mode_valid, +}; + + +static const struct drm_connector_funcs lt9611_connector_funcs = { + .fill_modes = drm_helper_probe_single_connector_modes, + .detect = lt9611_connector_detect, + .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 lt9611_bridge_attach(struct drm_bridge *bridge) +{ + struct mipi_dsi_host *host; + struct mipi_dsi_device *dsi; + struct lt9611 *pdata = bridge_to_lt9611(bridge); + int ret; + const struct mipi_dsi_device_info info = { .type = "lt9611", + .channel = 0, + .node = NULL, + }; + + if (!bridge->encoder) { + DRM_ERROR("Parent encoder object not found"); + return -ENODEV; + } + + ret = drm_connector_init(bridge->dev, &pdata->connector, + <9611_connector_funcs, + DRM_MODE_CONNECTOR_HDMIA); + if (ret) { + DRM_ERROR("Failed to initialize connector: %d\n", ret); + return ret; + } + + drm_connector_helper_add(&pdata->connector, + <9611_connector_helper_funcs); + + ret = drm_connector_register(&pdata->connector); + if (ret) { + DRM_ERROR("Failed to register connector: %d\n", ret); + return ret; + } + + pdata->connector.polled = DRM_CONNECTOR_POLL_CONNECT; + + ret = drm_connector_attach_encoder(&pdata->connector, + bridge->encoder); + if (ret) { + DRM_ERROR("Failed to link up connector to encoder: %d\n", ret); + return ret; + } + + host = of_find_mipi_dsi_host_by_node(pdata->host_node); + if (!host) { + pr_err("failed to find dsi host\n"); + return -EPROBE_DEFER; + } + + dsi = mipi_dsi_device_register_full(host, &info); + if (IS_ERR(dsi)) { + pr_err("failed to create dsi device\n"); + ret = PTR_ERR(dsi); + goto err_dsi_device; + } + + 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 | MIPI_DSI_MODE_VIDEO_BLLP | + MIPI_DSI_MODE_VIDEO_EOF_BLLP; + + ret = mipi_dsi_attach(dsi); + if (ret < 0) { + pr_err("failed to attach dsi to host\n"); + goto err_dsi_attach; + } + + pdata->dsi = dsi; + + return 0; + +err_dsi_attach: + mipi_dsi_device_unregister(dsi); +err_dsi_device: + return ret; +} + +static void lt9611_bridge_pre_enable(struct drm_bridge *bridge) +{ + struct lt9611 *pdata = bridge_to_lt9611(bridge); + + pr_debug("bridge pre_enable\n"); + lt9611_reset(pdata, true); +} + +static bool lt9611_bridge_mode_fixup(struct drm_bridge *bridge, + const struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode) +{ + return true; +} + +static void lt9611_bridge_post_disable(struct drm_bridge *bridge) +{ + pr_debug("bridge post_disable\n"); + +} + +static const struct drm_bridge_funcs lt9611_bridge_funcs = { + .attach = lt9611_bridge_attach, + .mode_fixup = lt9611_bridge_mode_fixup, + .pre_enable = lt9611_bridge_pre_enable, + .enable = lt9611_bridge_enable, + .disable = lt9611_bridge_disable, + .post_disable = lt9611_bridge_post_disable, + .mode_set = lt9611_bridge_mode_set, +}; + +/* sysfs */ +static int lt9611_dump_debug_info(struct lt9611 *pdata) +{ + if (!pdata->power_on) { + pr_err("device is not power on\n"); + return -EINVAL; + } + + lt9611_read_edid(pdata); + + return 0; +} + +static ssize_t dump_info_store(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t count) +{ + struct lt9611 *pdata = dev_get_drvdata(dev); + + if (!pdata) { + pr_err("pdata is NULL\n"); + return -EINVAL; + } + + lt9611_dump_debug_info(pdata); + + return count; +} + +static ssize_t firmware_upgrade_store(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t count) +{ + struct lt9611 *pdata = dev_get_drvdata(dev); + int ret = 0; + + if (!pdata) { + pr_err("pdata is NULL\n"); + return -EINVAL; + } + + ret = request_firmware_nowait(THIS_MODULE, true, + "lt9611_fw.bin", &pdata->i2c_client->dev, GFP_KERNEL, pdata, + lt9611_firmware_cb); + if (ret) + dev_err(&pdata->i2c_client->dev, + "Failed to invoke firmware loader: %d\n", ret); + else + pr_info("LT9611 starts upgrade, waiting for about 40s...\n"); + + return count; +} + +static ssize_t firmware_upgrade_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct lt9611 *pdata = dev_get_drvdata(dev); + + return snprintf(buf, 4, "%d\n", pdata->fw_status); +} + +static DEVICE_ATTR_WO(dump_info); +static DEVICE_ATTR_RW(firmware_upgrade); + +static struct attribute *lt9611_sysfs_attrs[] = { + &dev_attr_dump_info.attr, + &dev_attr_firmware_upgrade.attr, + NULL, +}; + +static struct attribute_group lt9611_sysfs_attr_grp = { + .attrs = lt9611_sysfs_attrs, +}; + +static int lt9611_sysfs_init(struct device *dev) +{ + int rc = 0; + + if (!dev) { + pr_err("%s: Invalid params\n", __func__); + return -EINVAL; + } + + rc = sysfs_create_group(&dev->kobj, <9611_sysfs_attr_grp); + if (rc) + pr_err("%s: sysfs group creation failed %d\n", __func__, rc); + + return rc; +} + +static void lt9611_sysfs_remove(struct device *dev) +{ + if (!dev) { + pr_err("%s: Invalid params\n", __func__); + return; + } + + sysfs_remove_group(&dev->kobj, <9611_sysfs_attr_grp); +} + +static int lt9611_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct lt9611 *pdata; + int ret = 0; + + if (!client || !client->dev.of_node) { + pr_err("invalid input\n"); + return -EINVAL; + } + + if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { + pr_err("device doesn't support I2C\n"); + return -ENODEV; + } + + pdata = devm_kzalloc(&client->dev, + sizeof(struct lt9611), GFP_KERNEL); + if (!pdata) + return -ENOMEM; + + ret = lt9611_parse_dt(&client->dev, pdata); + if (ret) { + pr_err("failed to parse device tree\n"); + goto err_dt_parse; + } + + ret = lt9611_get_dt_supply(&client->dev, pdata); + if (ret) { + pr_err("failed to get dt supply\n"); + goto err_dt_parse; + } + + pdata->dev = &client->dev; + pdata->i2c_client = client; + + ret = lt9611_gpio_configure(pdata, true); + if (ret) { + pr_err("failed to configure GPIOs\n"); + goto err_dt_supply; + } + + lt9611_assert_5v(pdata); + + ret = lt9611_enable_vreg(pdata, true); + if (ret) { + pr_err("failed to enable vreg\n"); + goto err_i2c_prog; + } + + lt9611_reset(pdata, true); + + pdata->irq = gpio_to_irq(pdata->irq_gpio); + ret = request_threaded_irq(pdata->irq, NULL, lt9611_irq_thread_handler, + IRQF_TRIGGER_FALLING | IRQF_ONESHOT, "lt9611", pdata); + if (ret) { + pr_err("failed to request irq\n"); + goto err_i2c_prog; + } + + ret = lt9611_read_device_id(pdata); + if (ret) { + pr_err("failed to read chip rev\n"); + goto err_sysfs_init; + } + + msleep(200); + + i2c_set_clientdata(client, pdata); + dev_set_drvdata(&client->dev, pdata); + + if (lt9611_get_version(pdata) == VERSION_NUM) { + pr_info("LT9611 works, no need to upgrade FW\n"); + } else { + ret = request_firmware_nowait(THIS_MODULE, true, + "lt9611_fw.bin", &client->dev, GFP_KERNEL, pdata, + lt9611_firmware_cb); + if (ret) { + dev_err(&client->dev, + "Failed to invoke firmware loader: %d\n", ret); + goto err_sysfs_init; + } else + return 0; + } + + ret = lt9611_sysfs_init(&client->dev); + if (ret) { + pr_err("sysfs init failed\n"); + goto err_sysfs_init; + } + +#if IS_ENABLED(CONFIG_OF) + pdata->bridge.of_node = client->dev.of_node; +#endif + + pdata->bridge.funcs = <9611_bridge_funcs; + drm_bridge_add(&pdata->bridge); + + return 0; + +err_sysfs_init: + disable_irq(pdata->irq); + free_irq(pdata->irq, pdata); +err_i2c_prog: + lt9611_gpio_configure(pdata, false); +err_dt_supply: + lt9611_put_dt_supply(&client->dev, pdata); +err_dt_parse: + devm_kfree(&client->dev, pdata); + return ret; +} + +static int lt9611_remove(struct i2c_client *client) +{ + int ret = -EINVAL; + struct lt9611 *pdata = i2c_get_clientdata(client); + struct drm_display_mode *mode, *n; + + if (!pdata) + goto end; + + mipi_dsi_detach(pdata->dsi); + mipi_dsi_device_unregister(pdata->dsi); + + drm_bridge_remove(&pdata->bridge); + + lt9611_sysfs_remove(&client->dev); + + disable_irq(pdata->irq); + free_irq(pdata->irq, pdata); + + ret = lt9611_gpio_configure(pdata, false); + + lt9611_put_dt_supply(&client->dev, pdata); + + if (pdata->non_pluggable) { + list_for_each_entry_safe(mode, n, &pdata->mode_list, head) { + list_del(&mode->head); + kfree(mode); + } + } + + devm_kfree(&client->dev, pdata); + +end: + return ret; +} + + +static struct i2c_device_id lt9611_id[] = { + { "lt,lt9611uxc", 0}, + {} +}; + +static const struct of_device_id lt9611_match_table[] = { + {.compatible = "lt,lt9611uxc"}, + {} +}; +MODULE_DEVICE_TABLE(of, lt9611_match_table); + +static struct i2c_driver lt9611_driver = { + .driver = { + .name = "lt9611", + .of_match_table = lt9611_match_table, + }, + .probe = lt9611_probe, + .remove = lt9611_remove, + .id_table = lt9611_id, +}; + +static int __init lt9611_init(void) +{ + return i2c_add_driver(<9611_driver); +} + +static void __exit lt9611_exit(void) +{ + i2c_del_driver(<9611_driver); +} + +module_init(lt9611_init); +module_exit(lt9611_exit); +