| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * Copyright (C) 2017-2018, Bootlin |
| */ |
| |
| #include <linux/backlight.h> |
| #include <linux/delay.h> |
| #include <linux/device.h> |
| #include <linux/err.h> |
| #include <linux/errno.h> |
| #include <linux/fb.h> |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| |
| #include <linux/gpio/consumer.h> |
| #include <linux/regulator/consumer.h> |
| |
| #include <drm/drm_mipi_dsi.h> |
| #include <drm/drm_modes.h> |
| #include <drm/drm_panel.h> |
| |
| #include <video/mipi_display.h> |
| |
| struct ili9881c { |
| struct drm_panel panel; |
| struct mipi_dsi_device *dsi; |
| |
| struct backlight_device *backlight; |
| struct regulator *power; |
| struct gpio_desc *reset; |
| }; |
| |
| enum ili9881c_op { |
| ILI9881C_SWITCH_PAGE, |
| ILI9881C_COMMAND, |
| }; |
| |
| struct ili9881c_instr { |
| enum ili9881c_op op; |
| |
| union arg { |
| struct cmd { |
| u8 cmd; |
| u8 data; |
| } cmd; |
| u8 page; |
| } arg; |
| }; |
| |
| #define ILI9881C_SWITCH_PAGE_INSTR(_page) \ |
| { \ |
| .op = ILI9881C_SWITCH_PAGE, \ |
| .arg = { \ |
| .page = (_page), \ |
| }, \ |
| } |
| |
| #define ILI9881C_COMMAND_INSTR(_cmd, _data) \ |
| { \ |
| .op = ILI9881C_COMMAND, \ |
| .arg = { \ |
| .cmd = { \ |
| .cmd = (_cmd), \ |
| .data = (_data), \ |
| }, \ |
| }, \ |
| } |
| |
| static const struct ili9881c_instr ili9881c_init[] = { |
| ILI9881C_SWITCH_PAGE_INSTR(3), |
| ILI9881C_COMMAND_INSTR(0x01, 0x00), |
| ILI9881C_COMMAND_INSTR(0x02, 0x00), |
| ILI9881C_COMMAND_INSTR(0x03, 0x73), |
| ILI9881C_COMMAND_INSTR(0x04, 0x03), |
| ILI9881C_COMMAND_INSTR(0x05, 0x00), |
| ILI9881C_COMMAND_INSTR(0x06, 0x06), |
| ILI9881C_COMMAND_INSTR(0x07, 0x06), |
| ILI9881C_COMMAND_INSTR(0x08, 0x00), |
| ILI9881C_COMMAND_INSTR(0x09, 0x18), |
| ILI9881C_COMMAND_INSTR(0x0a, 0x04), |
| ILI9881C_COMMAND_INSTR(0x0b, 0x00), |
| ILI9881C_COMMAND_INSTR(0x0c, 0x02), |
| ILI9881C_COMMAND_INSTR(0x0d, 0x03), |
| ILI9881C_COMMAND_INSTR(0x0e, 0x00), |
| ILI9881C_COMMAND_INSTR(0x0f, 0x25), |
| ILI9881C_COMMAND_INSTR(0x10, 0x25), |
| ILI9881C_COMMAND_INSTR(0x11, 0x00), |
| ILI9881C_COMMAND_INSTR(0x12, 0x00), |
| ILI9881C_COMMAND_INSTR(0x13, 0x00), |
| ILI9881C_COMMAND_INSTR(0x14, 0x00), |
| ILI9881C_COMMAND_INSTR(0x15, 0x00), |
| ILI9881C_COMMAND_INSTR(0x16, 0x0C), |
| ILI9881C_COMMAND_INSTR(0x17, 0x00), |
| ILI9881C_COMMAND_INSTR(0x18, 0x00), |
| ILI9881C_COMMAND_INSTR(0x19, 0x00), |
| ILI9881C_COMMAND_INSTR(0x1a, 0x00), |
| ILI9881C_COMMAND_INSTR(0x1b, 0x00), |
| ILI9881C_COMMAND_INSTR(0x1c, 0x00), |
| ILI9881C_COMMAND_INSTR(0x1d, 0x00), |
| ILI9881C_COMMAND_INSTR(0x1e, 0xC0), |
| ILI9881C_COMMAND_INSTR(0x1f, 0x80), |
| ILI9881C_COMMAND_INSTR(0x20, 0x04), |
| ILI9881C_COMMAND_INSTR(0x21, 0x01), |
| ILI9881C_COMMAND_INSTR(0x22, 0x00), |
| ILI9881C_COMMAND_INSTR(0x23, 0x00), |
| ILI9881C_COMMAND_INSTR(0x24, 0x00), |
| ILI9881C_COMMAND_INSTR(0x25, 0x00), |
| ILI9881C_COMMAND_INSTR(0x26, 0x00), |
| ILI9881C_COMMAND_INSTR(0x27, 0x00), |
| ILI9881C_COMMAND_INSTR(0x28, 0x33), |
| ILI9881C_COMMAND_INSTR(0x29, 0x03), |
| ILI9881C_COMMAND_INSTR(0x2a, 0x00), |
| ILI9881C_COMMAND_INSTR(0x2b, 0x00), |
| ILI9881C_COMMAND_INSTR(0x2c, 0x00), |
| ILI9881C_COMMAND_INSTR(0x2d, 0x00), |
| ILI9881C_COMMAND_INSTR(0x2e, 0x00), |
| ILI9881C_COMMAND_INSTR(0x2f, 0x00), |
| ILI9881C_COMMAND_INSTR(0x30, 0x00), |
| ILI9881C_COMMAND_INSTR(0x31, 0x00), |
| ILI9881C_COMMAND_INSTR(0x32, 0x00), |
| ILI9881C_COMMAND_INSTR(0x33, 0x00), |
| ILI9881C_COMMAND_INSTR(0x34, 0x04), |
| ILI9881C_COMMAND_INSTR(0x35, 0x00), |
| ILI9881C_COMMAND_INSTR(0x36, 0x00), |
| ILI9881C_COMMAND_INSTR(0x37, 0x00), |
| ILI9881C_COMMAND_INSTR(0x38, 0x3C), |
| ILI9881C_COMMAND_INSTR(0x39, 0x00), |
| ILI9881C_COMMAND_INSTR(0x3a, 0x00), |
| ILI9881C_COMMAND_INSTR(0x3b, 0x00), |
| ILI9881C_COMMAND_INSTR(0x3c, 0x00), |
| ILI9881C_COMMAND_INSTR(0x3d, 0x00), |
| ILI9881C_COMMAND_INSTR(0x3e, 0x00), |
| ILI9881C_COMMAND_INSTR(0x3f, 0x00), |
| ILI9881C_COMMAND_INSTR(0x40, 0x00), |
| ILI9881C_COMMAND_INSTR(0x41, 0x00), |
| ILI9881C_COMMAND_INSTR(0x42, 0x00), |
| ILI9881C_COMMAND_INSTR(0x43, 0x00), |
| ILI9881C_COMMAND_INSTR(0x44, 0x00), |
| ILI9881C_COMMAND_INSTR(0x50, 0x01), |
| ILI9881C_COMMAND_INSTR(0x51, 0x23), |
| ILI9881C_COMMAND_INSTR(0x52, 0x45), |
| ILI9881C_COMMAND_INSTR(0x53, 0x67), |
| ILI9881C_COMMAND_INSTR(0x54, 0x89), |
| ILI9881C_COMMAND_INSTR(0x55, 0xab), |
| ILI9881C_COMMAND_INSTR(0x56, 0x01), |
| ILI9881C_COMMAND_INSTR(0x57, 0x23), |
| ILI9881C_COMMAND_INSTR(0x58, 0x45), |
| ILI9881C_COMMAND_INSTR(0x59, 0x67), |
| ILI9881C_COMMAND_INSTR(0x5a, 0x89), |
| ILI9881C_COMMAND_INSTR(0x5b, 0xab), |
| ILI9881C_COMMAND_INSTR(0x5c, 0xcd), |
| ILI9881C_COMMAND_INSTR(0x5d, 0xef), |
| ILI9881C_COMMAND_INSTR(0x5e, 0x11), |
| ILI9881C_COMMAND_INSTR(0x5f, 0x02), |
| ILI9881C_COMMAND_INSTR(0x60, 0x02), |
| ILI9881C_COMMAND_INSTR(0x61, 0x02), |
| ILI9881C_COMMAND_INSTR(0x62, 0x02), |
| ILI9881C_COMMAND_INSTR(0x63, 0x02), |
| ILI9881C_COMMAND_INSTR(0x64, 0x02), |
| ILI9881C_COMMAND_INSTR(0x65, 0x02), |
| ILI9881C_COMMAND_INSTR(0x66, 0x02), |
| ILI9881C_COMMAND_INSTR(0x67, 0x02), |
| ILI9881C_COMMAND_INSTR(0x68, 0x02), |
| ILI9881C_COMMAND_INSTR(0x69, 0x02), |
| ILI9881C_COMMAND_INSTR(0x6a, 0x0C), |
| ILI9881C_COMMAND_INSTR(0x6b, 0x02), |
| ILI9881C_COMMAND_INSTR(0x6c, 0x0F), |
| ILI9881C_COMMAND_INSTR(0x6d, 0x0E), |
| ILI9881C_COMMAND_INSTR(0x6e, 0x0D), |
| ILI9881C_COMMAND_INSTR(0x6f, 0x06), |
| ILI9881C_COMMAND_INSTR(0x70, 0x07), |
| ILI9881C_COMMAND_INSTR(0x71, 0x02), |
| ILI9881C_COMMAND_INSTR(0x72, 0x02), |
| ILI9881C_COMMAND_INSTR(0x73, 0x02), |
| ILI9881C_COMMAND_INSTR(0x74, 0x02), |
| ILI9881C_COMMAND_INSTR(0x75, 0x02), |
| ILI9881C_COMMAND_INSTR(0x76, 0x02), |
| ILI9881C_COMMAND_INSTR(0x77, 0x02), |
| ILI9881C_COMMAND_INSTR(0x78, 0x02), |
| ILI9881C_COMMAND_INSTR(0x79, 0x02), |
| ILI9881C_COMMAND_INSTR(0x7a, 0x02), |
| ILI9881C_COMMAND_INSTR(0x7b, 0x02), |
| ILI9881C_COMMAND_INSTR(0x7c, 0x02), |
| ILI9881C_COMMAND_INSTR(0x7d, 0x02), |
| ILI9881C_COMMAND_INSTR(0x7e, 0x02), |
| ILI9881C_COMMAND_INSTR(0x7f, 0x02), |
| ILI9881C_COMMAND_INSTR(0x80, 0x0C), |
| ILI9881C_COMMAND_INSTR(0x81, 0x02), |
| ILI9881C_COMMAND_INSTR(0x82, 0x0F), |
| ILI9881C_COMMAND_INSTR(0x83, 0x0E), |
| ILI9881C_COMMAND_INSTR(0x84, 0x0D), |
| ILI9881C_COMMAND_INSTR(0x85, 0x06), |
| ILI9881C_COMMAND_INSTR(0x86, 0x07), |
| ILI9881C_COMMAND_INSTR(0x87, 0x02), |
| ILI9881C_COMMAND_INSTR(0x88, 0x02), |
| ILI9881C_COMMAND_INSTR(0x89, 0x02), |
| ILI9881C_COMMAND_INSTR(0x8A, 0x02), |
| ILI9881C_SWITCH_PAGE_INSTR(4), |
| ILI9881C_COMMAND_INSTR(0x6C, 0x15), |
| ILI9881C_COMMAND_INSTR(0x6E, 0x22), |
| ILI9881C_COMMAND_INSTR(0x6F, 0x33), |
| ILI9881C_COMMAND_INSTR(0x3A, 0xA4), |
| ILI9881C_COMMAND_INSTR(0x8D, 0x0D), |
| ILI9881C_COMMAND_INSTR(0x87, 0xBA), |
| ILI9881C_COMMAND_INSTR(0x26, 0x76), |
| ILI9881C_COMMAND_INSTR(0xB2, 0xD1), |
| ILI9881C_SWITCH_PAGE_INSTR(1), |
| ILI9881C_COMMAND_INSTR(0x22, 0x0A), |
| ILI9881C_COMMAND_INSTR(0x53, 0xDC), |
| ILI9881C_COMMAND_INSTR(0x55, 0xA7), |
| ILI9881C_COMMAND_INSTR(0x50, 0x78), |
| ILI9881C_COMMAND_INSTR(0x51, 0x78), |
| ILI9881C_COMMAND_INSTR(0x31, 0x02), |
| ILI9881C_COMMAND_INSTR(0x60, 0x14), |
| ILI9881C_COMMAND_INSTR(0xA0, 0x2A), |
| ILI9881C_COMMAND_INSTR(0xA1, 0x39), |
| ILI9881C_COMMAND_INSTR(0xA2, 0x46), |
| ILI9881C_COMMAND_INSTR(0xA3, 0x0e), |
| ILI9881C_COMMAND_INSTR(0xA4, 0x12), |
| ILI9881C_COMMAND_INSTR(0xA5, 0x25), |
| ILI9881C_COMMAND_INSTR(0xA6, 0x19), |
| ILI9881C_COMMAND_INSTR(0xA7, 0x1d), |
| ILI9881C_COMMAND_INSTR(0xA8, 0xa6), |
| ILI9881C_COMMAND_INSTR(0xA9, 0x1C), |
| ILI9881C_COMMAND_INSTR(0xAA, 0x29), |
| ILI9881C_COMMAND_INSTR(0xAB, 0x85), |
| ILI9881C_COMMAND_INSTR(0xAC, 0x1C), |
| ILI9881C_COMMAND_INSTR(0xAD, 0x1B), |
| ILI9881C_COMMAND_INSTR(0xAE, 0x51), |
| ILI9881C_COMMAND_INSTR(0xAF, 0x22), |
| ILI9881C_COMMAND_INSTR(0xB0, 0x2d), |
| ILI9881C_COMMAND_INSTR(0xB1, 0x4f), |
| ILI9881C_COMMAND_INSTR(0xB2, 0x59), |
| ILI9881C_COMMAND_INSTR(0xB3, 0x3F), |
| ILI9881C_COMMAND_INSTR(0xC0, 0x2A), |
| ILI9881C_COMMAND_INSTR(0xC1, 0x3a), |
| ILI9881C_COMMAND_INSTR(0xC2, 0x45), |
| ILI9881C_COMMAND_INSTR(0xC3, 0x0e), |
| ILI9881C_COMMAND_INSTR(0xC4, 0x11), |
| ILI9881C_COMMAND_INSTR(0xC5, 0x24), |
| ILI9881C_COMMAND_INSTR(0xC6, 0x1a), |
| ILI9881C_COMMAND_INSTR(0xC7, 0x1c), |
| ILI9881C_COMMAND_INSTR(0xC8, 0xaa), |
| ILI9881C_COMMAND_INSTR(0xC9, 0x1C), |
| ILI9881C_COMMAND_INSTR(0xCA, 0x29), |
| ILI9881C_COMMAND_INSTR(0xCB, 0x96), |
| ILI9881C_COMMAND_INSTR(0xCC, 0x1C), |
| ILI9881C_COMMAND_INSTR(0xCD, 0x1B), |
| ILI9881C_COMMAND_INSTR(0xCE, 0x51), |
| ILI9881C_COMMAND_INSTR(0xCF, 0x22), |
| ILI9881C_COMMAND_INSTR(0xD0, 0x2b), |
| ILI9881C_COMMAND_INSTR(0xD1, 0x4b), |
| ILI9881C_COMMAND_INSTR(0xD2, 0x59), |
| ILI9881C_COMMAND_INSTR(0xD3, 0x3F), |
| }; |
| |
| static inline struct ili9881c *panel_to_ili9881c(struct drm_panel *panel) |
| { |
| return container_of(panel, struct ili9881c, panel); |
| } |
| |
| /* |
| * The panel seems to accept some private DCS commands that map |
| * directly to registers. |
| * |
| * It is organised by page, with each page having its own set of |
| * registers, and the first page looks like it's holding the standard |
| * DCS commands. |
| * |
| * So before any attempt at sending a command or data, we have to be |
| * sure if we're in the right page or not. |
| */ |
| static int ili9881c_switch_page(struct ili9881c *ctx, u8 page) |
| { |
| u8 buf[4] = { 0xff, 0x98, 0x81, page }; |
| int ret; |
| |
| ret = mipi_dsi_dcs_write_buffer(ctx->dsi, buf, sizeof(buf)); |
| if (ret < 0) |
| return ret; |
| |
| return 0; |
| } |
| |
| static int ili9881c_send_cmd_data(struct ili9881c *ctx, u8 cmd, u8 data) |
| { |
| u8 buf[2] = { cmd, data }; |
| int ret; |
| |
| ret = mipi_dsi_dcs_write_buffer(ctx->dsi, buf, sizeof(buf)); |
| if (ret < 0) |
| return ret; |
| |
| return 0; |
| } |
| |
| static int ili9881c_prepare(struct drm_panel *panel) |
| { |
| struct ili9881c *ctx = panel_to_ili9881c(panel); |
| unsigned int i; |
| int ret; |
| |
| /* Power the panel */ |
| ret = regulator_enable(ctx->power); |
| if (ret) |
| return ret; |
| msleep(5); |
| |
| /* And reset it */ |
| gpiod_set_value(ctx->reset, 1); |
| msleep(20); |
| |
| gpiod_set_value(ctx->reset, 0); |
| msleep(20); |
| |
| for (i = 0; i < ARRAY_SIZE(ili9881c_init); i++) { |
| const struct ili9881c_instr *instr = &ili9881c_init[i]; |
| |
| if (instr->op == ILI9881C_SWITCH_PAGE) |
| ret = ili9881c_switch_page(ctx, instr->arg.page); |
| else if (instr->op == ILI9881C_COMMAND) |
| ret = ili9881c_send_cmd_data(ctx, instr->arg.cmd.cmd, |
| instr->arg.cmd.data); |
| |
| if (ret) |
| return ret; |
| } |
| |
| ret = ili9881c_switch_page(ctx, 0); |
| if (ret) |
| return ret; |
| |
| ret = mipi_dsi_dcs_set_tear_on(ctx->dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK); |
| if (ret) |
| return ret; |
| |
| ret = mipi_dsi_dcs_exit_sleep_mode(ctx->dsi); |
| if (ret) |
| return ret; |
| |
| return 0; |
| } |
| |
| static int ili9881c_enable(struct drm_panel *panel) |
| { |
| struct ili9881c *ctx = panel_to_ili9881c(panel); |
| |
| msleep(120); |
| |
| mipi_dsi_dcs_set_display_on(ctx->dsi); |
| backlight_enable(ctx->backlight); |
| |
| return 0; |
| } |
| |
| static int ili9881c_disable(struct drm_panel *panel) |
| { |
| struct ili9881c *ctx = panel_to_ili9881c(panel); |
| |
| backlight_disable(ctx->backlight); |
| return mipi_dsi_dcs_set_display_off(ctx->dsi); |
| } |
| |
| static int ili9881c_unprepare(struct drm_panel *panel) |
| { |
| struct ili9881c *ctx = panel_to_ili9881c(panel); |
| |
| mipi_dsi_dcs_enter_sleep_mode(ctx->dsi); |
| regulator_disable(ctx->power); |
| gpiod_set_value(ctx->reset, 1); |
| |
| return 0; |
| } |
| |
| static const struct drm_display_mode bananapi_default_mode = { |
| .clock = 62000, |
| .vrefresh = 60, |
| |
| .hdisplay = 720, |
| .hsync_start = 720 + 10, |
| .hsync_end = 720 + 10 + 20, |
| .htotal = 720 + 10 + 20 + 30, |
| |
| .vdisplay = 1280, |
| .vsync_start = 1280 + 10, |
| .vsync_end = 1280 + 10 + 10, |
| .vtotal = 1280 + 10 + 10 + 20, |
| }; |
| |
| static int ili9881c_get_modes(struct drm_panel *panel) |
| { |
| struct drm_connector *connector = panel->connector; |
| struct ili9881c *ctx = panel_to_ili9881c(panel); |
| struct drm_display_mode *mode; |
| |
| mode = drm_mode_duplicate(panel->drm, &bananapi_default_mode); |
| if (!mode) { |
| dev_err(&ctx->dsi->dev, "failed to add mode %ux%ux@%u\n", |
| bananapi_default_mode.hdisplay, |
| bananapi_default_mode.vdisplay, |
| bananapi_default_mode.vrefresh); |
| return -ENOMEM; |
| } |
| |
| drm_mode_set_name(mode); |
| |
| mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED; |
| drm_mode_probed_add(connector, mode); |
| |
| panel->connector->display_info.width_mm = 62; |
| panel->connector->display_info.height_mm = 110; |
| |
| return 1; |
| } |
| |
| static const struct drm_panel_funcs ili9881c_funcs = { |
| .prepare = ili9881c_prepare, |
| .unprepare = ili9881c_unprepare, |
| .enable = ili9881c_enable, |
| .disable = ili9881c_disable, |
| .get_modes = ili9881c_get_modes, |
| }; |
| |
| static int ili9881c_dsi_probe(struct mipi_dsi_device *dsi) |
| { |
| struct device_node *np; |
| struct ili9881c *ctx; |
| int ret; |
| |
| ctx = devm_kzalloc(&dsi->dev, sizeof(*ctx), GFP_KERNEL); |
| if (!ctx) |
| return -ENOMEM; |
| mipi_dsi_set_drvdata(dsi, ctx); |
| ctx->dsi = dsi; |
| |
| drm_panel_init(&ctx->panel); |
| ctx->panel.dev = &dsi->dev; |
| ctx->panel.funcs = &ili9881c_funcs; |
| |
| ctx->power = devm_regulator_get(&dsi->dev, "power"); |
| if (IS_ERR(ctx->power)) { |
| dev_err(&dsi->dev, "Couldn't get our power regulator\n"); |
| return PTR_ERR(ctx->power); |
| } |
| |
| ctx->reset = devm_gpiod_get(&dsi->dev, "reset", GPIOD_OUT_LOW); |
| if (IS_ERR(ctx->reset)) { |
| dev_err(&dsi->dev, "Couldn't get our reset GPIO\n"); |
| return PTR_ERR(ctx->reset); |
| } |
| |
| np = of_parse_phandle(dsi->dev.of_node, "backlight", 0); |
| if (np) { |
| ctx->backlight = of_find_backlight_by_node(np); |
| of_node_put(np); |
| |
| if (!ctx->backlight) |
| return -EPROBE_DEFER; |
| } |
| |
| ret = drm_panel_add(&ctx->panel); |
| if (ret < 0) |
| return ret; |
| |
| dsi->mode_flags = MIPI_DSI_MODE_VIDEO_SYNC_PULSE; |
| dsi->format = MIPI_DSI_FMT_RGB888; |
| dsi->lanes = 4; |
| |
| return mipi_dsi_attach(dsi); |
| } |
| |
| static int ili9881c_dsi_remove(struct mipi_dsi_device *dsi) |
| { |
| struct ili9881c *ctx = mipi_dsi_get_drvdata(dsi); |
| |
| mipi_dsi_detach(dsi); |
| drm_panel_remove(&ctx->panel); |
| |
| if (ctx->backlight) |
| put_device(&ctx->backlight->dev); |
| |
| return 0; |
| } |
| |
| static const struct of_device_id ili9881c_of_match[] = { |
| { .compatible = "bananapi,lhr050h41" }, |
| { } |
| }; |
| MODULE_DEVICE_TABLE(of, ili9881c_of_match); |
| |
| static struct mipi_dsi_driver ili9881c_dsi_driver = { |
| .probe = ili9881c_dsi_probe, |
| .remove = ili9881c_dsi_remove, |
| .driver = { |
| .name = "ili9881c-dsi", |
| .of_match_table = ili9881c_of_match, |
| }, |
| }; |
| module_mipi_dsi_driver(ili9881c_dsi_driver); |
| |
| MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>"); |
| MODULE_DESCRIPTION("Ilitek ILI9881C Controller Driver"); |
| MODULE_LICENSE("GPL v2"); |
