2 * LG.Philips LB035Q02 LCD Panel driver
4 * Copyright (C) 2013 Texas Instruments
5 * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
6 * Based on a driver by: Steve Sakoman <steve@sakoman.com>
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License version 2 as published by
10 * the Free Software Foundation.
13 #include <linux/module.h>
14 #include <linux/delay.h>
15 #include <linux/spi/spi.h>
16 #include <linux/mutex.h>
17 #include <linux/gpio.h>
18 #include <linux/gpio/consumer.h>
20 #include "../dss/omapdss.h"
22 static struct omap_video_timings lb035q02_timings = {
26 .pixelclock = 6500000,
36 .sync_pclk_edge = OMAPDSS_DRIVE_SIG_FALLING_EDGE,
38 .flags = DISPLAY_FLAGS_HSYNC_LOW | DISPLAY_FLAGS_VSYNC_LOW |
39 DISPLAY_FLAGS_DE_HIGH | DISPLAY_FLAGS_PIXDATA_POSEDGE,
42 struct panel_drv_data {
43 struct omap_dss_device dssdev;
44 struct omap_dss_device *in;
46 struct spi_device *spi;
50 struct omap_video_timings videomode;
52 struct gpio_desc *enable_gpio;
55 #define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)
57 static int lb035q02_write_reg(struct spi_device *spi, u8 reg, u16 val)
59 struct spi_message msg;
60 struct spi_transfer index_xfer = {
64 struct spi_transfer value_xfer = {
69 spi_message_init(&msg);
74 buffer[2] = reg & 0x7f;
75 index_xfer.tx_buf = buffer;
76 spi_message_add_tail(&index_xfer, &msg);
82 value_xfer.tx_buf = buffer + 4;
83 spi_message_add_tail(&value_xfer, &msg);
85 return spi_sync(spi, &msg);
88 static void init_lb035q02_panel(struct spi_device *spi)
90 /* Init sequence from page 28 of the lb035q02 spec */
91 lb035q02_write_reg(spi, 0x01, 0x6300);
92 lb035q02_write_reg(spi, 0x02, 0x0200);
93 lb035q02_write_reg(spi, 0x03, 0x0177);
94 lb035q02_write_reg(spi, 0x04, 0x04c7);
95 lb035q02_write_reg(spi, 0x05, 0xffc0);
96 lb035q02_write_reg(spi, 0x06, 0xe806);
97 lb035q02_write_reg(spi, 0x0a, 0x4008);
98 lb035q02_write_reg(spi, 0x0b, 0x0000);
99 lb035q02_write_reg(spi, 0x0d, 0x0030);
100 lb035q02_write_reg(spi, 0x0e, 0x2800);
101 lb035q02_write_reg(spi, 0x0f, 0x0000);
102 lb035q02_write_reg(spi, 0x16, 0x9f80);
103 lb035q02_write_reg(spi, 0x17, 0x0a0f);
104 lb035q02_write_reg(spi, 0x1e, 0x00c1);
105 lb035q02_write_reg(spi, 0x30, 0x0300);
106 lb035q02_write_reg(spi, 0x31, 0x0007);
107 lb035q02_write_reg(spi, 0x32, 0x0000);
108 lb035q02_write_reg(spi, 0x33, 0x0000);
109 lb035q02_write_reg(spi, 0x34, 0x0707);
110 lb035q02_write_reg(spi, 0x35, 0x0004);
111 lb035q02_write_reg(spi, 0x36, 0x0302);
112 lb035q02_write_reg(spi, 0x37, 0x0202);
113 lb035q02_write_reg(spi, 0x3a, 0x0a0d);
114 lb035q02_write_reg(spi, 0x3b, 0x0806);
117 static int lb035q02_connect(struct omap_dss_device *dssdev)
119 struct panel_drv_data *ddata = to_panel_data(dssdev);
120 struct omap_dss_device *in = ddata->in;
123 if (omapdss_device_is_connected(dssdev))
126 r = in->ops.dpi->connect(in, dssdev);
130 init_lb035q02_panel(ddata->spi);
135 static void lb035q02_disconnect(struct omap_dss_device *dssdev)
137 struct panel_drv_data *ddata = to_panel_data(dssdev);
138 struct omap_dss_device *in = ddata->in;
140 if (!omapdss_device_is_connected(dssdev))
143 in->ops.dpi->disconnect(in, dssdev);
146 static int lb035q02_enable(struct omap_dss_device *dssdev)
148 struct panel_drv_data *ddata = to_panel_data(dssdev);
149 struct omap_dss_device *in = ddata->in;
152 if (!omapdss_device_is_connected(dssdev))
155 if (omapdss_device_is_enabled(dssdev))
158 if (ddata->data_lines)
159 in->ops.dpi->set_data_lines(in, ddata->data_lines);
160 in->ops.dpi->set_timings(in, &ddata->videomode);
162 r = in->ops.dpi->enable(in);
166 if (ddata->enable_gpio)
167 gpiod_set_value_cansleep(ddata->enable_gpio, 1);
169 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
174 static void lb035q02_disable(struct omap_dss_device *dssdev)
176 struct panel_drv_data *ddata = to_panel_data(dssdev);
177 struct omap_dss_device *in = ddata->in;
179 if (!omapdss_device_is_enabled(dssdev))
182 if (ddata->enable_gpio)
183 gpiod_set_value_cansleep(ddata->enable_gpio, 0);
185 in->ops.dpi->disable(in);
187 dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
190 static void lb035q02_set_timings(struct omap_dss_device *dssdev,
191 struct omap_video_timings *timings)
193 struct panel_drv_data *ddata = to_panel_data(dssdev);
194 struct omap_dss_device *in = ddata->in;
196 ddata->videomode = *timings;
197 dssdev->panel.timings = *timings;
199 in->ops.dpi->set_timings(in, timings);
202 static void lb035q02_get_timings(struct omap_dss_device *dssdev,
203 struct omap_video_timings *timings)
205 struct panel_drv_data *ddata = to_panel_data(dssdev);
207 *timings = ddata->videomode;
210 static int lb035q02_check_timings(struct omap_dss_device *dssdev,
211 struct omap_video_timings *timings)
213 struct panel_drv_data *ddata = to_panel_data(dssdev);
214 struct omap_dss_device *in = ddata->in;
216 return in->ops.dpi->check_timings(in, timings);
219 static struct omap_dss_driver lb035q02_ops = {
220 .connect = lb035q02_connect,
221 .disconnect = lb035q02_disconnect,
223 .enable = lb035q02_enable,
224 .disable = lb035q02_disable,
226 .set_timings = lb035q02_set_timings,
227 .get_timings = lb035q02_get_timings,
228 .check_timings = lb035q02_check_timings,
230 .get_resolution = omapdss_default_get_resolution,
233 static int lb035q02_probe_of(struct spi_device *spi)
235 struct device_node *node = spi->dev.of_node;
236 struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
237 struct omap_dss_device *in;
238 struct gpio_desc *gpio;
240 gpio = devm_gpiod_get(&spi->dev, "enable", GPIOD_OUT_LOW);
242 dev_err(&spi->dev, "failed to parse enable gpio\n");
243 return PTR_ERR(gpio);
246 ddata->enable_gpio = gpio;
248 in = omapdss_of_find_source_for_first_ep(node);
250 dev_err(&spi->dev, "failed to find video source\n");
259 static int lb035q02_panel_spi_probe(struct spi_device *spi)
261 struct panel_drv_data *ddata;
262 struct omap_dss_device *dssdev;
265 ddata = devm_kzalloc(&spi->dev, sizeof(*ddata), GFP_KERNEL);
269 dev_set_drvdata(&spi->dev, ddata);
273 if (!spi->dev.of_node)
276 r = lb035q02_probe_of(spi);
280 ddata->videomode = lb035q02_timings;
282 dssdev = &ddata->dssdev;
283 dssdev->dev = &spi->dev;
284 dssdev->driver = &lb035q02_ops;
285 dssdev->type = OMAP_DISPLAY_TYPE_DPI;
286 dssdev->owner = THIS_MODULE;
287 dssdev->panel.timings = ddata->videomode;
288 dssdev->phy.dpi.data_lines = ddata->data_lines;
290 r = omapdss_register_display(dssdev);
292 dev_err(&spi->dev, "Failed to register panel\n");
299 omap_dss_put_device(ddata->in);
303 static int lb035q02_panel_spi_remove(struct spi_device *spi)
305 struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
306 struct omap_dss_device *dssdev = &ddata->dssdev;
307 struct omap_dss_device *in = ddata->in;
309 omapdss_unregister_display(dssdev);
311 lb035q02_disable(dssdev);
312 lb035q02_disconnect(dssdev);
314 omap_dss_put_device(in);
319 static const struct of_device_id lb035q02_of_match[] = {
320 { .compatible = "omapdss,lgphilips,lb035q02", },
324 MODULE_DEVICE_TABLE(of, lb035q02_of_match);
326 static struct spi_driver lb035q02_spi_driver = {
327 .probe = lb035q02_panel_spi_probe,
328 .remove = lb035q02_panel_spi_remove,
330 .name = "panel_lgphilips_lb035q02",
331 .of_match_table = lb035q02_of_match,
332 .suppress_bind_attrs = true,
336 module_spi_driver(lb035q02_spi_driver);
338 MODULE_ALIAS("spi:lgphilips,lb035q02");
339 MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
340 MODULE_DESCRIPTION("LG.Philips LB035Q02 LCD Panel driver");
341 MODULE_LICENSE("GPL");