--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2024 BayLibre, SAS
+ * Author: Jerome Brunet <jbrunet@baylibre.com>
+ */
+
+#include <linux/gpio/consumer.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/regulator/consumer.h>
+
+#include <video/mipi_display.h>
+
+#include <drm/drm_device.h>
+#include <drm/drm_probe_helper.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_modes.h>
+#include <drm/drm_panel.h>
+
+struct lincoln_lcd197_panel {
+ struct drm_panel panel;
+ struct mipi_dsi_device *dsi;
+ struct regulator *supply;
+ struct gpio_desc *enable_gpio;
+ struct gpio_desc *reset_gpio;
+};
+
+static inline
+struct lincoln_lcd197_panel *to_lincoln_lcd197_panel(struct drm_panel *panel)
+{
+ return container_of(panel, struct lincoln_lcd197_panel, panel);
+}
+
+static int lincoln_lcd197_panel_prepare(struct drm_panel *panel)
+{
+ struct lincoln_lcd197_panel *lcd = to_lincoln_lcd197_panel(panel);
+ struct mipi_dsi_multi_context ctx = { .dsi = lcd->dsi };
+ int err;
+
+ gpiod_set_value_cansleep(lcd->enable_gpio, 0);
+ err = regulator_enable(lcd->supply);
+ if (err < 0)
+ return err;
+
+ gpiod_set_value_cansleep(lcd->enable_gpio, 1);
+ usleep_range(1000, 2000);
+ gpiod_set_value_cansleep(lcd->reset_gpio, 1);
+ usleep_range(5000, 6000);
+ gpiod_set_value_cansleep(lcd->reset_gpio, 0);
+ msleep(50);
+
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0xb9, 0xff, 0x83, 0x99);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0xd2, 0x55);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0xb1, 0x02, 0x04, 0x70, 0x90, 0x01,
+ 0x32, 0x33, 0x11, 0x11, 0x4d, 0x57, 0x56, 0x73,
+ 0x02, 0x02);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0xb2, 0x00, 0x80, 0x80, 0xae, 0x0a,
+ 0x0e, 0x75, 0x11, 0x00, 0x00, 0x00);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0xb4, 0x00, 0xff, 0x04, 0xa4, 0x02,
+ 0xa0, 0x00, 0x00, 0x10, 0x00, 0x00, 0x02, 0x00,
+ 0x24, 0x02, 0x04, 0x0a, 0x21, 0x03, 0x00, 0x00,
+ 0x08, 0xa6, 0x88, 0x04, 0xa4, 0x02, 0xa0, 0x00,
+ 0x00, 0x10, 0x00, 0x00, 0x02, 0x00, 0x24, 0x02,
+ 0x04, 0x0a, 0x00, 0x00, 0x08, 0xa6, 0x00, 0x08,
+ 0x11);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0xd3, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x18, 0x18, 0x32, 0x10, 0x09, 0x00, 0x09,
+ 0x32, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x11, 0x00, 0x02, 0x02, 0x03, 0x00,
+ 0x00, 0x00, 0x0a, 0x40);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0xd5, 0x18, 0x18, 0x18, 0x18, 0x21,
+ 0x20, 0x18, 0x18, 0x19, 0x19, 0x19, 0x19, 0x18,
+ 0x18, 0x18, 0x18, 0x03, 0x02, 0x01, 0x00, 0x2f,
+ 0x2f, 0x30, 0x30, 0x31, 0x31, 0x18, 0x18, 0x18,
+ 0x18, 0x18, 0x18);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0xd6, 0x18, 0x18, 0x18, 0x18, 0x20,
+ 0x21, 0x19, 0x19, 0x18, 0x18, 0x19, 0x19, 0x18,
+ 0x18, 0x18, 0x18, 0x00, 0x01, 0x02, 0x03, 0x2f,
+ 0x2f, 0x30, 0x30, 0x31, 0x31, 0x18, 0x18, 0x18,
+ 0x18, 0x18, 0x18);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0xbd, 0x01);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0xd8, 0x0a, 0xbe, 0xfa, 0xa0, 0x0a,
+ 0xbe, 0xfa, 0xa0);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0xd8, 0x0f, 0xff, 0xff, 0xe0, 0x0f,
+ 0xff, 0xff, 0xe0);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0xbd, 0x02);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0xd8, 0x0f, 0xff, 0xff, 0xe0, 0x0f,
+ 0xff, 0xff, 0xe0);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0xe0, 0x01, 0x11, 0x1c, 0x17, 0x39,
+ 0x43, 0x54, 0x51, 0x5a, 0x64, 0x6c, 0x74, 0x7a,
+ 0x83, 0x8d, 0x92, 0x99, 0xa4, 0xa9, 0xb4, 0xaa,
+ 0xba, 0xbe, 0x63, 0x5e, 0x69, 0x73, 0x01, 0x11,
+ 0x1c, 0x17, 0x39, 0x43, 0x54, 0x51, 0x5a, 0x64,
+ 0x6c, 0x74, 0x7a, 0x83, 0x8d, 0x92, 0x99, 0xa4,
+ 0xa7, 0xb2, 0xa9, 0xba, 0xbe, 0x63, 0x5e, 0x69,
+ 0x73);
+ mipi_dsi_usleep_range(&ctx, 200, 300);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0xb6, 0x92, 0x92);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0xcc, 0x00);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0xbf, 0x40, 0x41, 0x50, 0x49);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0xc6, 0xff, 0xf9);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0xc0, 0x25, 0x5a);
+ mipi_dsi_dcs_write_seq_multi(&ctx, MIPI_DCS_SET_ADDRESS_MODE, 0x02);
+ mipi_dsi_dcs_exit_sleep_mode_multi(&ctx);
+ mipi_dsi_msleep(&ctx, 120);
+
+ if (ctx.accum_err) {
+ gpiod_set_value_cansleep(lcd->enable_gpio, 0);
+ gpiod_set_value_cansleep(lcd->reset_gpio, 1);
+ regulator_disable(lcd->supply);
+ }
+
+ return ctx.accum_err;
+}
+
+static int lincoln_lcd197_panel_unprepare(struct drm_panel *panel)
+{
+ struct lincoln_lcd197_panel *lcd = to_lincoln_lcd197_panel(panel);
+ struct mipi_dsi_multi_context ctx = { .dsi = lcd->dsi };
+
+ mipi_dsi_dcs_enter_sleep_mode_multi(&ctx);
+ mipi_dsi_usleep_range(&ctx, 5000, 6000);
+ gpiod_set_value_cansleep(lcd->enable_gpio, 0);
+ gpiod_set_value_cansleep(lcd->reset_gpio, 1);
+ regulator_disable(lcd->supply);
+
+ return ctx.accum_err;
+}
+
+static int lincoln_lcd197_panel_enable(struct drm_panel *panel)
+{
+ struct lincoln_lcd197_panel *lcd = to_lincoln_lcd197_panel(panel);
+ struct mipi_dsi_multi_context ctx = { .dsi = lcd->dsi };
+
+ mipi_dsi_dcs_set_display_on_multi(&ctx);
+ mipi_dsi_msleep(&ctx, 20);
+
+ return ctx.accum_err;
+}
+
+static int lincoln_lcd197_panel_disable(struct drm_panel *panel)
+{
+ struct lincoln_lcd197_panel *lcd = to_lincoln_lcd197_panel(panel);
+ struct mipi_dsi_multi_context ctx = { .dsi = lcd->dsi };
+
+ mipi_dsi_dcs_set_display_off_multi(&ctx);
+ mipi_dsi_msleep(&ctx, 50);
+
+ return ctx.accum_err;
+}
+
+static const struct drm_display_mode lcd197_mode = {
+ .clock = 154002,
+ .hdisplay = 1080,
+ .hsync_start = 1080 + 20,
+ .hsync_end = 1080 + 20 + 6,
+ .htotal = 1080 + 204,
+ .vdisplay = 1920,
+ .vsync_start = 1920 + 4,
+ .vsync_end = 1920 + 4 + 4,
+ .vtotal = 1920 + 79,
+ .flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
+ .width_mm = 79,
+ .height_mm = 125,
+ .type = DRM_MODE_TYPE_DRIVER,
+};
+
+static int lincoln_lcd197_panel_get_modes(struct drm_panel *panel,
+ struct drm_connector *connector)
+{
+ return drm_connector_helper_get_modes_fixed(connector, &lcd197_mode);
+}
+
+static const struct drm_panel_funcs lincoln_lcd197_panel_funcs = {
+ .prepare = lincoln_lcd197_panel_prepare,
+ .unprepare = lincoln_lcd197_panel_unprepare,
+ .enable = lincoln_lcd197_panel_enable,
+ .disable = lincoln_lcd197_panel_disable,
+ .get_modes = lincoln_lcd197_panel_get_modes,
+};
+
+static int lincoln_lcd197_panel_probe(struct mipi_dsi_device *dsi)
+{
+ struct lincoln_lcd197_panel *lcd;
+ struct device *dev = &dsi->dev;
+ int err;
+
+ dsi->lanes = 4;
+ dsi->format = MIPI_DSI_FMT_RGB888;
+ dsi->mode_flags = (MIPI_DSI_MODE_VIDEO |
+ MIPI_DSI_MODE_VIDEO_BURST);
+
+ lcd = devm_kzalloc(&dsi->dev, sizeof(*lcd), GFP_KERNEL);
+ if (!lcd)
+ return -ENOMEM;
+
+ mipi_dsi_set_drvdata(dsi, lcd);
+ lcd->dsi = dsi;
+
+ lcd->supply = devm_regulator_get(dev, "power");
+ if (IS_ERR(lcd->supply))
+ return dev_err_probe(dev, PTR_ERR(lcd->supply),
+ "failed to get power supply");
+
+ lcd->enable_gpio = devm_gpiod_get(dev, "enable",
+ GPIOD_OUT_HIGH);
+ if (IS_ERR(lcd->enable_gpio))
+ return dev_err_probe(dev, PTR_ERR(lcd->enable_gpio),
+ "failed to get enable gpio");
+
+ lcd->reset_gpio = devm_gpiod_get(dev, "reset",
+ GPIOD_OUT_HIGH);
+ if (IS_ERR(lcd->reset_gpio))
+ return dev_err_probe(dev, PTR_ERR(lcd->reset_gpio),
+ "failed to get reset gpio");
+
+ drm_panel_init(&lcd->panel, dev,
+ &lincoln_lcd197_panel_funcs, DRM_MODE_CONNECTOR_DSI);
+
+ err = drm_panel_of_backlight(&lcd->panel);
+ if (err)
+ return err;
+
+ drm_panel_add(&lcd->panel);
+ err = mipi_dsi_attach(dsi);
+ if (err)
+ drm_panel_remove(&lcd->panel);
+
+ return err;
+}
+
+static void lincoln_lcd197_panel_remove(struct mipi_dsi_device *dsi)
+{
+ struct lincoln_lcd197_panel *lcd = mipi_dsi_get_drvdata(dsi);
+ int err;
+
+ err = mipi_dsi_detach(dsi);
+ if (err < 0)
+ dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", err);
+
+ drm_panel_remove(&lcd->panel);
+}
+
+static const struct of_device_id lincoln_lcd197_of_match[] = {
+ { .compatible = "lincolntech,lcd197", },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, lincoln_lcd197_of_match);
+
+static struct mipi_dsi_driver lincoln_lcd197_panel_driver = {
+ .driver = {
+ .name = "panel-lincolntech-lcd197",
+ .of_match_table = lincoln_lcd197_of_match,
+ },
+ .probe = lincoln_lcd197_panel_probe,
+ .remove = lincoln_lcd197_panel_remove,
+};
+module_mipi_dsi_driver(lincoln_lcd197_panel_driver);
+
+MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
+MODULE_DESCRIPTION("Lincoln Technologies LCD197 panel driver");
+MODULE_LICENSE("GPL");
projects / users / dwmw2 / linux.git / commitdiff