// SPDX-License-Identifier: GPL-2.0+ /* * NEC NL8048HL11 Panel Driver * * Copyright (C) 2019 Texas Instruments Incorporated * * Based on the omapdrm-specific panel-nec-nl8048hl11 driver * * Copyright (C) 2010 Texas Instruments Incorporated * Author: Erik Gilling */ #include #include #include #include #include #include #include #include struct nl8048_panel { struct drm_panel panel; struct spi_device *spi; struct gpio_desc *reset_gpio; }; #define to_nl8048_device(p) container_of(p, struct nl8048_panel, panel) static int nl8048_write(struct nl8048_panel *lcd, unsigned char addr, unsigned char value) { u8 data[4] = { value, 0x01, addr, 0x00 }; int ret; ret = spi_write(lcd->spi, data, sizeof(data)); if (ret) dev_err(&lcd->spi->dev, "SPI write to %u failed: %d\n", addr, ret); return ret; } static int nl8048_init(struct nl8048_panel *lcd) { static const struct { unsigned char addr; unsigned char data; } nl8048_init_seq[] = { { 3, 0x01 }, { 0, 0x00 }, { 1, 0x01 }, { 4, 0x00 }, { 5, 0x14 }, { 6, 0x24 }, { 16, 0xd7 }, { 17, 0x00 }, { 18, 0x00 }, { 19, 0x55 }, { 20, 0x01 }, { 21, 0x70 }, { 22, 0x1e }, { 23, 0x25 }, { 24, 0x25 }, { 25, 0x02 }, { 26, 0x02 }, { 27, 0xa0 }, { 32, 0x2f }, { 33, 0x0f }, { 34, 0x0f }, { 35, 0x0f }, { 36, 0x0f }, { 37, 0x0f }, { 38, 0x0f }, { 39, 0x00 }, { 40, 0x02 }, { 41, 0x02 }, { 42, 0x02 }, { 43, 0x0f }, { 44, 0x0f }, { 45, 0x0f }, { 46, 0x0f }, { 47, 0x0f }, { 48, 0x0f }, { 49, 0x0f }, { 50, 0x00 }, { 51, 0x02 }, { 52, 0x02 }, { 53, 0x02 }, { 80, 0x0c }, { 83, 0x42 }, { 84, 0x42 }, { 85, 0x41 }, { 86, 0x14 }, { 89, 0x88 }, { 90, 0x01 }, { 91, 0x00 }, { 92, 0x02 }, { 93, 0x0c }, { 94, 0x1c }, { 95, 0x27 }, { 98, 0x49 }, { 99, 0x27 }, { 102, 0x76 }, { 103, 0x27 }, { 112, 0x01 }, { 113, 0x0e }, { 114, 0x02 }, { 115, 0x0c }, { 118, 0x0c }, { 121, 0x30 }, { 130, 0x00 }, { 131, 0x00 }, { 132, 0xfc }, { 134, 0x00 }, { 136, 0x00 }, { 138, 0x00 }, { 139, 0x00 }, { 140, 0x00 }, { 141, 0xfc }, { 143, 0x00 }, { 145, 0x00 }, { 147, 0x00 }, { 148, 0x00 }, { 149, 0x00 }, { 150, 0xfc }, { 152, 0x00 }, { 154, 0x00 }, { 156, 0x00 }, { 157, 0x00 }, }; unsigned int i; int ret; for (i = 0; i < ARRAY_SIZE(nl8048_init_seq); ++i) { ret = nl8048_write(lcd, nl8048_init_seq[i].addr, nl8048_init_seq[i].data); if (ret < 0) return ret; } udelay(20); return nl8048_write(lcd, 2, 0x00); } static int nl8048_disable(struct drm_panel *panel) { struct nl8048_panel *lcd = to_nl8048_device(panel); gpiod_set_value_cansleep(lcd->reset_gpio, 0); return 0; } static int nl8048_enable(struct drm_panel *panel) { struct nl8048_panel *lcd = to_nl8048_device(panel); gpiod_set_value_cansleep(lcd->reset_gpio, 1); return 0; } static const struct drm_display_mode nl8048_mode = { /* NEC PIX Clock Ratings MIN:21.8MHz TYP:23.8MHz MAX:25.7MHz */ .clock = 23800, .hdisplay = 800, .hsync_start = 800 + 6, .hsync_end = 800 + 6 + 1, .htotal = 800 + 6 + 1 + 4, .vdisplay = 480, .vsync_start = 480 + 3, .vsync_end = 480 + 3 + 1, .vtotal = 480 + 3 + 1 + 4, .vrefresh = 60, .type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED, .flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC, .width_mm = 89, .height_mm = 53, }; static int nl8048_get_modes(struct drm_panel *panel) { struct drm_connector *connector = panel->connector; struct drm_display_mode *mode; mode = drm_mode_duplicate(panel->drm, &nl8048_mode); if (!mode) return -ENOMEM; drm_mode_set_name(mode); drm_mode_probed_add(connector, mode); connector->display_info.width_mm = nl8048_mode.width_mm; connector->display_info.height_mm = nl8048_mode.height_mm; connector->display_info.bus_flags = DRM_BUS_FLAG_DE_HIGH | DRM_BUS_FLAG_SYNC_SAMPLE_NEGEDGE | DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE; return 1; } static const struct drm_panel_funcs nl8048_funcs = { .disable = nl8048_disable, .enable = nl8048_enable, .get_modes = nl8048_get_modes, }; static int __maybe_unused nl8048_suspend(struct device *dev) { struct nl8048_panel *lcd = dev_get_drvdata(dev); nl8048_write(lcd, 2, 0x01); msleep(40); return 0; } static int __maybe_unused nl8048_resume(struct device *dev) { struct nl8048_panel *lcd = dev_get_drvdata(dev); /* Reinitialize the panel. */ spi_setup(lcd->spi); nl8048_write(lcd, 2, 0x00); nl8048_init(lcd); return 0; } static SIMPLE_DEV_PM_OPS(nl8048_pm_ops, nl8048_suspend, nl8048_resume); static int nl8048_probe(struct spi_device *spi) { struct nl8048_panel *lcd; int ret; lcd = devm_kzalloc(&spi->dev, sizeof(*lcd), GFP_KERNEL); if (!lcd) return -ENOMEM; spi_set_drvdata(spi, lcd); lcd->spi = spi; lcd->reset_gpio = devm_gpiod_get(&spi->dev, "reset", GPIOD_OUT_LOW); if (IS_ERR(lcd->reset_gpio)) { dev_err(&spi->dev, "failed to parse reset gpio\n"); return PTR_ERR(lcd->reset_gpio); } spi->mode = SPI_MODE_0; spi->bits_per_word = 32; ret = spi_setup(spi); if (ret < 0) { dev_err(&spi->dev, "failed to setup SPI: %d\n", ret); return ret; } ret = nl8048_init(lcd); if (ret < 0) return ret; drm_panel_init(&lcd->panel, &lcd->spi->dev, &nl8048_funcs); return drm_panel_add(&lcd->panel); } static int nl8048_remove(struct spi_device *spi) { struct nl8048_panel *lcd = spi_get_drvdata(spi); drm_panel_remove(&lcd->panel); drm_panel_disable(&lcd->panel); drm_panel_unprepare(&lcd->panel); return 0; } static const struct of_device_id nl8048_of_match[] = { { .compatible = "nec,nl8048hl11", }, { /* sentinel */ }, }; MODULE_DEVICE_TABLE(of, nl8048_of_match); static struct spi_driver nl8048_driver = { .probe = nl8048_probe, .remove = nl8048_remove, .driver = { .name = "panel-nec-nl8048hl11", .pm = &nl8048_pm_ops, .of_match_table = nl8048_of_match, }, }; module_spi_driver(nl8048_driver); MODULE_ALIAS("spi:nec,nl8048hl11"); MODULE_AUTHOR("Erik Gilling "); MODULE_DESCRIPTION("NEC-NL8048HL11 Driver"); MODULE_LICENSE("GPL");