| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * Copyright (c) 2020, The Linux Foundation. All rights reserved. |
| */ |
| |
| #define pr_fmt(fmt) "%s: " fmt, __func__ |
| |
| #include <linux/types.h> |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/device.h> |
| #include <linux/platform_device.h> |
| #include <linux/fs.h> |
| #include <linux/delay.h> |
| #include <linux/i2c.h> |
| #include <linux/gpio.h> |
| #include <linux/interrupt.h> |
| #include <linux/component.h> |
| #include <linux/workqueue.h> |
| #include <linux/of_gpio.h> |
| #include <linux/of_graph.h> |
| #include <linux/of_irq.h> |
| #include <linux/regulator/consumer.h> |
| #include <linux/firmware.h> |
| #include <linux/hdmi.h> |
| #include <drm/drmP.h> |
| #include <drm/drm_atomic.h> |
| #include <drm/drm_atomic_helper.h> |
| #include <drm/drm_edid.h> |
| #include <drm/drm_mipi_dsi.h> |
| #include <drm/drm_crtc_helper.h> |
| #include <linux/string.h> |
| |
| #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 |
| |
| 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; |
| |
| struct workqueue_struct *wq; |
| struct work_struct work; |
| |
| u8 edid_buf[EDID_SEG_SIZE]; |
| u8 i2c_wbuf[WRITE_BUF_MAX_SIZE]; |
| u8 i2c_rbuf[READ_BUF_MAX_SIZE]; |
| bool hdmi_mode; |
| bool hpd_support; |
| 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}, |
| }; |
| |
| void lt9611_hpd_work(struct work_struct *work) |
| { |
| char name[32], status[32]; |
| char *envp[5]; |
| char *event_string = "HOTPLUG=1"; |
| enum drm_connector_status last_status; |
| struct drm_device *dev = NULL; |
| struct lt9611 *pdata = container_of(work, struct lt9611, work); |
| |
| if (!pdata || !pdata->connector.funcs || |
| !pdata->connector.funcs->detect) |
| return; |
| |
| dev = pdata->connector.dev; |
| last_status = pdata->connector.status; |
| pdata->connector.status = |
| pdata->connector.funcs->detect(&pdata->connector, true); |
| |
| if (last_status == pdata->connector.status) |
| return; |
| |
| scnprintf(name, 32, "name=%s", |
| pdata->connector.name); |
| scnprintf(status, 32, "status=%s", |
| drm_get_connector_status_name(pdata->connector.status)); |
| pr_debug("[%s]:[%s]\n", name, status); |
| envp[0] = name; |
| envp[1] = status; |
| envp[2] = event_string; |
| envp[3] = NULL; |
| envp[4] = NULL; |
| kobject_uevent_env(&dev->primary->kdev->kobj, KOBJ_CHANGE, |
| envp); |
| } |
| |
| 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); |
| msleep(50); |
| |
| 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); |
| msleep(50); |
| |
| return ret; |
| } |
| |
| static irqreturn_t lt9611_irq_thread_handler(int irq, void *dev_id) |
| { |
| u8 irq_status = 0, hpd_status = 0; |
| struct lt9611 *pdata = (struct lt9611 *)dev_id; |
| |
| lt9611_write_byte(pdata, 0xFF, 0x80); |
| lt9611_write_byte(pdata, 0xEE, 0x01); |
| lt9611_write_byte(pdata, 0xFF, 0xB0); |
| if (!lt9611_read(pdata, 0x22, &irq_status, 1)) { |
| pr_debug("irq status 0x%x\n", irq_status); |
| if (irq_status) { |
| lt9611_write_byte(pdata, 0x22, 0); |
| lt9611_read(pdata, 0x23, &hpd_status, 1); |
| pr_debug("irq hpd status 0x%x\n", hpd_status); |
| } |
| } else |
| pr_err("get irq status failed\n"); |
| lt9611_write_byte(pdata, 0xFF, 0x80); |
| lt9611_write_byte(pdata, 0xEE, 0x00); |
| |
| msleep(50); |
| if (irq_status & (BIT(0) | BIT(1))) |
| queue_work(pdata->wq, &pdata->work); |
| |
| 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(180); |
| } 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) |
| { |
| u8 hpd_status = 0; |
| struct lt9611 *pdata = connector_to_lt9611(connector); |
| |
| pdata->status = connector_status_disconnected; |
| if (force && pdata->hpd_support) { |
| lt9611_write_byte(pdata, 0xFF, 0x80); |
| lt9611_write_byte(pdata, 0xEE, 0x01); |
| lt9611_write_byte(pdata, 0xFF, 0xB0); |
| if (!lt9611_read(pdata, 0x23, &hpd_status, 1)) { |
| if (hpd_status & BIT(1)) |
| pdata->status = connector_status_connected; |
| pr_debug("hpd status %x\n", hpd_status); |
| } else |
| pr_err("read hpd status failed\n"); |
| lt9611_write_byte(pdata, 0xFF, 0x80); |
| lt9611_write_byte(pdata, 0xEE, 0x00); |
| msleep(50); |
| } else |
| 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; |
| u8 chip_version = 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); |
| |
| ret = lt9611_read_device_id(pdata); |
| if (ret) { |
| pr_err("failed to read chip rev\n"); |
| goto err_i2c_prog; |
| } |
| |
| i2c_set_clientdata(client, pdata); |
| dev_set_drvdata(&client->dev, pdata); |
| |
| ret = lt9611_sysfs_init(&client->dev); |
| if (ret) { |
| pr_err("sysfs init failed\n"); |
| goto err_i2c_prog; |
| } |
| |
| chip_version = lt9611_get_version(pdata); |
| pdata->hpd_support = false; |
| if (chip_version) { |
| pr_info("LT9611 works, no need to upgrade FW\n"); |
| if (chip_version >= 0x40) |
| pdata->hpd_support = true; |
| } 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_i2c_prog; |
| } else |
| return 0; |
| } |
| |
| #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); |
| |
| pdata->wq = create_singlethread_workqueue("lt9611_wk"); |
| if (!pdata->wq) { |
| pr_err("Error creating lt9611 wq\n"); |
| goto err_i2c_prog; |
| } |
| INIT_WORK(&pdata->work, lt9611_hpd_work); |
| |
| 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_irq", pdata); |
| if (ret) { |
| pr_err("failed to request irq\n"); |
| goto err_i2c_prog; |
| } |
| |
| return 0; |
| |
| 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); |
| if (pdata->wq) |
| destroy_workqueue(pdata->wq); |
| 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); |
| |