diff options
Diffstat (limited to 'drivers/gpu/drm/bridge/lt8912.c')
| -rw-r--r-- | drivers/gpu/drm/bridge/lt8912.c | 688 |
1 files changed, 688 insertions, 0 deletions
diff --git a/drivers/gpu/drm/bridge/lt8912.c b/drivers/gpu/drm/bridge/lt8912.c new file mode 100644 index 000000000000..3de3a0f8df4e --- /dev/null +++ b/drivers/gpu/drm/bridge/lt8912.c @@ -0,0 +1,688 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2018 Rockchip Electronics Co. Ltd. + * Copyright 2019 Toradex AG + */ + +#include <linux/kernel.h> +#include <linux/delay.h> +#include <linux/gpio.h> +#include <linux/gpio/consumer.h> +#include <linux/i2c.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_irq.h> +#include <linux/of_graph.h> +#include <linux/regmap.h> +#include <video/of_display_timing.h> +#include <video/videomode.h> + +#include <drm/drmP.h> +#include <drm/drm_of.h> +#include <drm/drm_atomic.h> +#include <drm/drm_crtc_helper.h> +#include <drm/drm_atomic_helper.h> +#include <drm/drm_panel.h> +#include <drm/drm_mipi_dsi.h> + +struct lt8912 { + struct drm_bridge bridge; + struct drm_connector connector; + struct drm_display_mode mode; + struct device *dev; + struct mipi_dsi_device *dsi; + struct device_node *host_node; + u8 num_dsi_lanes; + u8 channel_id; + unsigned int irq; + u8 sink_is_hdmi; + struct regmap *regmap[3]; + struct gpio_desc *hpd_gpio; + struct gpio_desc *reset_n; + struct i2c_adapter *ddc; /* optional regular DDC I2C bus */ +}; + +static int lt8912_attach_dsi(struct lt8912 *lt); + +static inline struct lt8912 *bridge_to_lt8912(struct drm_bridge *b) +{ + return container_of(b, struct lt8912, bridge); +} + +static inline struct lt8912 *connector_to_lt8912(struct drm_connector *c) +{ + return container_of(c, struct lt8912, connector); +} + +/* LT8912 MIPI to HDMI & LVDS REG setting - 20180115.txt */ +static void lt8912_init(struct lt8912 *lt) +{ + u8 lanes = lt->dsi->lanes; + const struct drm_display_mode *mode = <->mode; + u32 hactive, hfp, hsync, hbp, vfp, vsync, vbp, htotal, vtotal; + unsigned int hsync_activehigh, vsync_activehigh, reg; + unsigned int version[2]; + + dev_info(lt->dev, DRM_MODE_FMT "\n", DRM_MODE_ARG(mode)); + /* TODO: lvds output init */ + + hactive = mode->hdisplay; + hfp = mode->hsync_start - mode->hdisplay; + hsync = mode->hsync_end - mode->hsync_start; + hsync_activehigh = !!(mode->flags & DRM_MODE_FLAG_PHSYNC); + hbp = mode->htotal - mode->hsync_end; + vfp = mode->vsync_start - mode->vdisplay; + vsync = mode->vsync_end - mode->vsync_start; + vsync_activehigh = !!(mode->flags & DRM_MODE_FLAG_PVSYNC); + vbp = mode->vtotal - mode->vsync_end; + htotal = mode->htotal; + vtotal = mode->vtotal; + + regmap_read(lt->regmap[0], 0x00, &version[0]); + regmap_read(lt->regmap[0], 0x01, &version[1]); + + dev_info(lt->dev, "LT8912 ID: %02x, %02x\n", + version[0], version[1]); + + /* DigitalClockEn */ + regmap_write(lt->regmap[0], 0x08, 0xff); + regmap_write(lt->regmap[0], 0x09, 0xff); + regmap_write(lt->regmap[0], 0x0a, 0xff); + regmap_write(lt->regmap[0], 0x0b, 0x7c); + regmap_write(lt->regmap[0], 0x0c, 0xff); + + /* TxAnalog */ + regmap_write(lt->regmap[0], 0x31, 0xa1); + regmap_write(lt->regmap[0], 0x32, 0xa1); + regmap_write(lt->regmap[0], 0x33, 0x03); + regmap_write(lt->regmap[0], 0x37, 0x00); + regmap_write(lt->regmap[0], 0x38, 0x22); + regmap_write(lt->regmap[0], 0x60, 0x82); + + /* CbusAnalog */ + regmap_write(lt->regmap[0], 0x39, 0x45); + regmap_write(lt->regmap[0], 0x3a, 0x00); + regmap_write(lt->regmap[0], 0x3b, 0x00); + + /* HDMIPllAnalog */ + regmap_write(lt->regmap[0], 0x44, 0x31); + regmap_write(lt->regmap[0], 0x55, 0x44); + regmap_write(lt->regmap[0], 0x57, 0x01); + regmap_write(lt->regmap[0], 0x5a, 0x02); + + /* MIPIAnalog */ + regmap_write(lt->regmap[0], 0x3e, 0xce); + regmap_write(lt->regmap[0], 0x3f, 0xd4); + regmap_write(lt->regmap[0], 0x41, 0x3c); + + /* MipiBasicSet */ + regmap_write(lt->regmap[1], 0x12, 0x04); + regmap_write(lt->regmap[1], 0x13, lanes % 4); + regmap_write(lt->regmap[1], 0x14, 0x00); + + regmap_write(lt->regmap[1], 0x15, 0x00); + regmap_write(lt->regmap[1], 0x1a, 0x03); + regmap_write(lt->regmap[1], 0x1b, 0x03); + + /* MIPIDig */ + regmap_write(lt->regmap[1], 0x10, 0x01); + regmap_write(lt->regmap[1], 0x11, 0x0a); + regmap_write(lt->regmap[1], 0x18, hsync); + regmap_write(lt->regmap[1], 0x19, vsync); + regmap_write(lt->regmap[1], 0x1c, hactive % 0x100); + regmap_write(lt->regmap[1], 0x1d, hactive >> 8); + + regmap_write(lt->regmap[1], 0x2f, 0x0c); + + regmap_write(lt->regmap[1], 0x34, htotal % 0x100); + regmap_write(lt->regmap[1], 0x35, htotal >> 8); + regmap_write(lt->regmap[1], 0x36, vtotal % 0x100); + regmap_write(lt->regmap[1], 0x37, vtotal >> 8); + regmap_write(lt->regmap[1], 0x38, vbp % 0x100); + regmap_write(lt->regmap[1], 0x39, vbp >> 8); + regmap_write(lt->regmap[1], 0x3a, vfp % 0x100); + regmap_write(lt->regmap[1], 0x3b, vfp >> 8); + regmap_write(lt->regmap[1], 0x3c, hbp % 0x100); + regmap_write(lt->regmap[1], 0x3d, hbp >> 8); + regmap_write(lt->regmap[1], 0x3e, hfp % 0x100); + regmap_write(lt->regmap[1], 0x3f, hfp >> 8); + regmap_read(lt->regmap[0], 0xab, ®); + reg &= 0xfc; + reg |= (hsync_activehigh < 1) | vsync_activehigh; + regmap_write(lt->regmap[0], 0xab, reg); + + /* DDSConfig */ + regmap_write(lt->regmap[1], 0x4e, 0x6a); + regmap_write(lt->regmap[1], 0x4f, 0xad); + regmap_write(lt->regmap[1], 0x50, 0xf3); + regmap_write(lt->regmap[1], 0x51, 0x80); + + regmap_write(lt->regmap[1], 0x1f, 0x5e); + regmap_write(lt->regmap[1], 0x20, 0x01); + regmap_write(lt->regmap[1], 0x21, 0x2c); + regmap_write(lt->regmap[1], 0x22, 0x01); + regmap_write(lt->regmap[1], 0x23, 0xfa); + regmap_write(lt->regmap[1], 0x24, 0x00); + regmap_write(lt->regmap[1], 0x25, 0xc8); + regmap_write(lt->regmap[1], 0x26, 0x00); + regmap_write(lt->regmap[1], 0x27, 0x5e); + regmap_write(lt->regmap[1], 0x28, 0x01); + regmap_write(lt->regmap[1], 0x29, 0x2c); + regmap_write(lt->regmap[1], 0x2a, 0x01); + regmap_write(lt->regmap[1], 0x2b, 0xfa); + regmap_write(lt->regmap[1], 0x2c, 0x00); + regmap_write(lt->regmap[1], 0x2d, 0xc8); + regmap_write(lt->regmap[1], 0x2e, 0x00); + regmap_write(lt->regmap[1], 0x42, 0x64); + regmap_write(lt->regmap[1], 0x43, 0x00); + regmap_write(lt->regmap[1], 0x44, 0x04); + regmap_write(lt->regmap[1], 0x45, 0x00); + regmap_write(lt->regmap[1], 0x46, 0x59); + regmap_write(lt->regmap[1], 0x47, 0x00); + regmap_write(lt->regmap[1], 0x48, 0xf2); + regmap_write(lt->regmap[1], 0x49, 0x06); + regmap_write(lt->regmap[1], 0x4a, 0x00); + regmap_write(lt->regmap[1], 0x4b, 0x72); + regmap_write(lt->regmap[1], 0x4c, 0x45); + regmap_write(lt->regmap[1], 0x4d, 0x00); + regmap_write(lt->regmap[1], 0x52, 0x08); + regmap_write(lt->regmap[1], 0x53, 0x00); + regmap_write(lt->regmap[1], 0x54, 0xb2); + regmap_write(lt->regmap[1], 0x55, 0x00); + regmap_write(lt->regmap[1], 0x56, 0xe4); + regmap_write(lt->regmap[1], 0x57, 0x0d); + regmap_write(lt->regmap[1], 0x58, 0x00); + regmap_write(lt->regmap[1], 0x59, 0xe4); + regmap_write(lt->regmap[1], 0x5a, 0x8a); + regmap_write(lt->regmap[1], 0x5b, 0x00); + regmap_write(lt->regmap[1], 0x5c, 0x34); + regmap_write(lt->regmap[1], 0x1e, 0x4f); + regmap_write(lt->regmap[1], 0x51, 0x00); + + regmap_write(lt->regmap[0], 0xb2, lt->sink_is_hdmi); + + /* Audio Disable */ + regmap_write(lt->regmap[2], 0x06, 0x00); + regmap_write(lt->regmap[2], 0x07, 0x00); + + regmap_write(lt->regmap[2], 0x34, 0xd2); + + regmap_write(lt->regmap[2], 0x3c, 0x41); + + /* MIPIRxLogicRes */ + regmap_write(lt->regmap[0], 0x03, 0x7f); + usleep_range(10000, 20000); + regmap_write(lt->regmap[0], 0x03, 0xff); + + regmap_write(lt->regmap[1], 0x51, 0x80); + usleep_range(10000, 20000); + regmap_write(lt->regmap[1], 0x51, 0x00); +} + +static void lt8912_wakeup(struct lt8912 *lt) +{ + gpiod_direction_output(lt->reset_n, 1); + msleep(120); + gpiod_direction_output(lt->reset_n, 0); + + regmap_write(lt->regmap[0], 0x08,0xff); /* enable clk gating */ + regmap_write(lt->regmap[0], 0x41,0x3c); /* MIPI Rx Power On */ + regmap_write(lt->regmap[0], 0x05,0xfb); /* DDS logical reset */ + regmap_write(lt->regmap[0], 0x05,0xff); + regmap_write(lt->regmap[0], 0x03,0x7f); /* MIPI RX logical reset */ + usleep_range(10000, 20000); + regmap_write(lt->regmap[0], 0x03,0xff); + regmap_write(lt->regmap[0], 0x32,0xa1); + regmap_write(lt->regmap[0], 0x33,0x03); +} + +static void lt8912_sleep(struct lt8912 *lt) +{ + regmap_write(lt->regmap[0], 0x32,0xa0); + regmap_write(lt->regmap[0], 0x33,0x00); /* Disable HDMI output. */ + regmap_write(lt->regmap[0], 0x41,0x3d); /* MIPI Rx Power Down. */ + regmap_write(lt->regmap[0], 0x08,0x00); /* diable DDS clk. */ + + gpiod_direction_output(lt->reset_n, 1); +} + +static enum drm_connector_status +lt8912_connector_detect(struct drm_connector *connector, bool force) +{ + struct lt8912 *lt = connector_to_lt8912(connector); + enum drm_connector_status hpd, hpd_last; + int timeout = 0; + + hpd = connector_status_unknown; + do { + hpd_last = hpd; + hpd = gpiod_get_value_cansleep(lt->hpd_gpio) ? + connector_status_connected : connector_status_disconnected; + msleep(20); + timeout += 20; + } while((hpd_last != hpd) && (timeout < 500)); + + return hpd; +} + +static const struct drm_connector_funcs lt8912_connector_funcs = { + .detect = lt8912_connector_detect, + .fill_modes = drm_helper_probe_single_connector_modes, + .destroy = drm_connector_cleanup, + .reset = drm_atomic_helper_connector_reset, + .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, + .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, +}; + +static irqreturn_t lt8912_hpd_irq_thread(int irq, void *arg) +{ + struct lt8912 *lt = arg; + struct drm_connector *connector = <->connector; + + drm_helper_hpd_irq_event(connector->dev); + + return IRQ_HANDLED; +} + +static struct drm_encoder * +lt8912_connector_best_encoder(struct drm_connector *connector) +{ + struct lt8912 *lt = connector_to_lt8912(connector); + + return lt->bridge.encoder; +} + +static int lt8912_connector_get_modes(struct drm_connector *connector) +{ + struct lt8912 *lt = connector_to_lt8912(connector); + struct edid *edid; + struct display_timings *timings; + u32 bus_format = MEDIA_BUS_FMT_RGB888_1X24; + int i, ret, num_modes = 0; + + /* Check if optional DDC I2C bus should be used. */ + if (lt->ddc) { + edid = drm_get_edid(connector, lt->ddc); + if (edid) { + drm_mode_connector_update_edid_property(connector, + edid); + num_modes = drm_add_edid_modes(connector, edid); + lt->sink_is_hdmi = !!drm_detect_hdmi_monitor(edid); + kfree(edid); + } + if (num_modes == 0) { + dev_warn(lt->dev, "failed to get display timings from EDID\n"); + return 0; + } + } else { /* if not EDID, use dtb timings */ + timings = of_get_display_timings(lt->dev->of_node); + + if (timings->num_timings == 0) { + dev_err(lt->dev, "failed to get display timings from dtb\n"); + return 0; + } + + for (i = 0; i < timings->num_timings; i++) { + struct drm_display_mode *mode; + struct videomode vm; + + if (videomode_from_timings(timings, &vm, i)) { + continue; + } + + mode = drm_mode_create(connector->dev); + drm_display_mode_from_videomode(&vm, mode); + mode->type = DRM_MODE_TYPE_DRIVER; + + if (timings->native_mode == i) + mode->type |= DRM_MODE_TYPE_PREFERRED; + + drm_mode_set_name(mode); + drm_mode_probed_add(connector, mode); + num_modes++; + } + if (num_modes == 0) { + dev_err(lt->dev, "failed to get display modes from dtb\n"); + return 0; + } + } + + connector->display_info.bus_flags = DRM_BUS_FLAG_DE_LOW | + DRM_BUS_FLAG_PIXDATA_NEGEDGE; + ret = drm_display_info_set_bus_formats(&connector->display_info, + &bus_format, 1); + + if (ret) + return ret; + + return num_modes; +} + +static enum drm_mode_status lt8912_connector_mode_valid(struct drm_connector *connector, + struct drm_display_mode *mode) +{ + if (mode->clock > 150000) + return MODE_CLOCK_HIGH; + + if (mode->hdisplay > 1920) + return MODE_BAD_HVALUE; + + if (mode->vdisplay > 1080) + return MODE_BAD_VVALUE; + + return MODE_OK; +} + +static const struct drm_connector_helper_funcs lt8912_connector_helper_funcs = { + .get_modes = lt8912_connector_get_modes, + .best_encoder = lt8912_connector_best_encoder, + .mode_valid = lt8912_connector_mode_valid, +}; + +static void lt8912_bridge_post_disable(struct drm_bridge *bridge) +{ + struct lt8912 *lt = bridge_to_lt8912(bridge); + lt8912_sleep(lt); +} + +static void lt8912_bridge_enable(struct drm_bridge *bridge) +{ + struct lt8912 *lt = bridge_to_lt8912(bridge); + lt8912_init(lt); +} + +static void lt8912_bridge_pre_enable(struct drm_bridge *bridge) +{ + struct lt8912 *lt = bridge_to_lt8912(bridge); + lt8912_wakeup(lt); +} + +static void lt8912_bridge_mode_set(struct drm_bridge *bridge, + struct drm_display_mode *mode, + struct drm_display_mode *adj) +{ + struct lt8912 *lt = bridge_to_lt8912(bridge); + + drm_mode_copy(<->mode, adj); +} + +static int lt8912_bridge_attach(struct drm_bridge *bridge) +{ + struct lt8912 *lt = bridge_to_lt8912(bridge); + struct drm_connector *connector = <->connector; + int ret; + + connector->polled = DRM_CONNECTOR_POLL_HPD; + + ret = drm_connector_init(bridge->dev, connector, + <8912_connector_funcs, + DRM_MODE_CONNECTOR_HDMIA); + if (ret) { + dev_err(lt->dev, "failed to initialize connector\n"); + return ret; + } + + drm_connector_helper_add(connector, <8912_connector_helper_funcs); + drm_mode_connector_attach_encoder(connector, bridge->encoder); + + ret = lt8912_attach_dsi(lt); + + enable_irq(lt->irq); + + return ret; +} + +static const struct drm_bridge_funcs lt8912_bridge_funcs = { + .attach = lt8912_bridge_attach, + .mode_set = lt8912_bridge_mode_set, + .pre_enable = lt8912_bridge_pre_enable, + .enable = lt8912_bridge_enable, + .post_disable = lt8912_bridge_post_disable, +}; + +static const struct regmap_config lt8912_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .max_register = 0xff, +}; + +static int lt8912_i2c_init(struct lt8912 *lt, + struct i2c_client *client) +{ + struct i2c_board_info info[] = { + { I2C_BOARD_INFO("lt8912p0", 0x48), }, + { I2C_BOARD_INFO("lt8912p1", 0x49), }, + { I2C_BOARD_INFO("lt8912p2", 0x4a), } + }; + struct regmap *regmap; + unsigned int i; + int ret; + + if (!lt || !client) + return -ENODEV; + + for (i = 0; i < ARRAY_SIZE(info); i++) { + if (i > 0 ) { + client = i2c_new_dummy(client->adapter, info[i].addr); + if (!client) + return -ENODEV; + } + regmap = devm_regmap_init_i2c(client, <8912_regmap_config); + if (IS_ERR(regmap)) { + ret = PTR_ERR(regmap); + dev_err(lt->dev, + "Failed to initialize regmap: %d\n", ret); + return ret; + } + + lt->regmap[i] = regmap; + } + + return 0; +} + +int lt8912_attach_dsi(struct lt8912 *lt) +{ + struct device *dev = lt->dev; + struct mipi_dsi_host *host; + struct mipi_dsi_device *dsi; + int ret = 0; + const struct mipi_dsi_device_info info = { .type = "lt8912", + .channel = lt->channel_id, + .node = NULL, + }; + + host = of_find_mipi_dsi_host_by_node(lt->host_node); + if (!host) { + dev_err(dev, "failed to find dsi host\n"); + return -EPROBE_DEFER; + } + + dsi = mipi_dsi_device_register_full(host, &info); + if (IS_ERR(dsi)) { + dev_err(dev, "failed to create dsi device\n"); + ret = PTR_ERR(dsi); + goto err_dsi_device; + } + + lt->dsi = dsi; + + dsi->lanes = lt->num_dsi_lanes; + dsi->format = MIPI_DSI_FMT_RGB888; + dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST | + MIPI_DSI_MODE_LPM | MIPI_DSI_MODE_EOT_PACKET; + + ret = mipi_dsi_attach(dsi); + if (ret < 0) { + dev_err(dev, "failed to attach dsi to host\n"); + goto err_dsi_attach; + } + + return 0; + +err_dsi_attach: + mipi_dsi_device_unregister(dsi); +err_dsi_device: + return ret; +} + +void lt8912_detach_dsi(struct lt8912 *lt) +{ + mipi_dsi_detach(lt->dsi); + mipi_dsi_device_unregister(lt->dsi); +} + + +static int lt8912_probe(struct i2c_client *i2c, const struct i2c_device_id *id) +{ + struct device *dev = &i2c->dev; + struct lt8912 *lt; + struct device_node *ddc_phandle; + struct device_node *endpoint; + unsigned int irq_flags; + int ret; + + static int initialize_it = 1; + + if(!initialize_it) { + initialize_it = 1; + return -EPROBE_DEFER; + } + + lt = devm_kzalloc(dev, sizeof(*lt), GFP_KERNEL); + if (!lt) + return -ENOMEM; + + lt->dev = dev; + + /* get optional regular DDC I2C bus */ + ddc_phandle = of_parse_phandle(dev->of_node, "ddc-i2c-bus", 0); + if (ddc_phandle) { + lt->ddc = of_get_i2c_adapter_by_node(ddc_phandle); + if (!(lt->ddc)) + ret = -EPROBE_DEFER; + of_node_put(ddc_phandle); + } + + lt->hpd_gpio = devm_gpiod_get(dev, "hpd", GPIOD_IN); + if (IS_ERR(lt->hpd_gpio)) { + dev_err(dev, "failed to get hpd gpio\n"); + return ret; + } + + lt->irq = gpiod_to_irq(lt->hpd_gpio); + if (lt->irq == -ENXIO) { + dev_err(dev, "failed to get hpd irq\n"); + return -ENODEV; + } + if (lt->irq < 0) { + dev_err(dev, "failed to get hpd irq, %i\n", lt->irq); + return lt->irq; + } + irq_flags = IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | IRQF_ONESHOT; + ret = devm_request_threaded_irq(dev, lt->irq, + NULL, + lt8912_hpd_irq_thread, + irq_flags, "lt8912_hpd", lt); + if (ret) { + dev_err(dev, "failed to request irq\n"); + return -ENODEV; + } + + disable_irq(lt->irq); + + lt->reset_n = devm_gpiod_get_optional(dev, "reset", GPIOD_ASIS); + if (IS_ERR(lt->reset_n)) { + ret = PTR_ERR(lt->reset_n); + dev_err(dev, "failed to request reset GPIO: %d\n", ret); + return ret; + } + + ret = lt8912_i2c_init(lt, i2c); + if (ret) + return ret; + + /* TODO: interrupt handing */ + + lt->num_dsi_lanes = 4; + lt->channel_id = 1; + + endpoint = of_graph_get_next_endpoint(dev->of_node, NULL); + if (!endpoint) + return -ENODEV; + + lt->host_node = of_graph_get_remote_port_parent(endpoint); + if (!lt->host_node) { + of_node_put(endpoint); + return -ENODEV; + } + + of_node_put(endpoint); + of_node_put(lt->host_node); + + lt->bridge.funcs = <8912_bridge_funcs; + lt->bridge.of_node = dev->of_node; + ret = drm_bridge_add(<->bridge); + if (ret) { + dev_err(dev, "failed to add bridge: %d\n", ret); + return ret; + } + + return 0; +} + +static int lt8912_remove(struct i2c_client *i2c) +{ + struct lt8912 *lt = i2c_get_clientdata(i2c); + + lt8912_sleep(lt); + mipi_dsi_detach(lt->dsi); + drm_bridge_remove(<->bridge); + + return 0; +} + +static const struct i2c_device_id lt8912_i2c_ids[] = { + { "lt8912", 0 }, + { } +}; + +static const struct of_device_id lt8912_of_match[] = { + { .compatible = "lontium,lt8912" }, + {} +}; +MODULE_DEVICE_TABLE(of, lt8912_of_match); + +static struct mipi_dsi_driver lt8912_driver = { + .driver.name = "lt8912", +}; + +static struct i2c_driver lt8912_i2c_driver = { + .driver = { + .name = "lt8912", + .of_match_table = lt8912_of_match, + }, + .id_table = lt8912_i2c_ids, + .probe = lt8912_probe, + .remove = lt8912_remove, +}; + +static int __init lt8912_i2c_drv_init(void) +{ + mipi_dsi_driver_register(<8912_driver); + + return i2c_add_driver(<8912_i2c_driver); +} +module_init(lt8912_i2c_drv_init); + +static void __exit lt8912_i2c_exit(void) +{ + i2c_del_driver(<8912_i2c_driver); + + mipi_dsi_driver_unregister(<8912_driver); +} +module_exit(lt8912_i2c_exit); + +MODULE_AUTHOR("Wyon Bi <bivvy.bi@rock-chips.com>"); +MODULE_DESCRIPTION("Lontium LT8912 MIPI-DSI to LVDS and HDMI/MHL bridge"); +MODULE_LICENSE("GPL v2"); |