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>
19 #include <video/omapdss.h>
20 #include <video/omap-panel-data.h>
22 static struct omap_video_timings lb035q02_timings
= {
26 .pixelclock
= 6500000,
36 .vsync_level
= OMAPDSS_SIG_ACTIVE_LOW
,
37 .hsync_level
= OMAPDSS_SIG_ACTIVE_LOW
,
38 .data_pclk_edge
= OMAPDSS_DRIVE_SIG_RISING_EDGE
,
39 .de_level
= OMAPDSS_SIG_ACTIVE_HIGH
,
40 .sync_pclk_edge
= OMAPDSS_DRIVE_SIG_FALLING_EDGE
,
43 struct panel_drv_data
{
44 struct omap_dss_device dssdev
;
45 struct omap_dss_device
*in
;
47 struct spi_device
*spi
;
51 struct omap_video_timings videomode
;
53 /* used for non-DT boot, to be removed */
56 struct gpio_desc
*enable_gpio
;
59 #define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)
61 static int lb035q02_write_reg(struct spi_device
*spi
, u8 reg
, u16 val
)
63 struct spi_message msg
;
64 struct spi_transfer index_xfer
= {
68 struct spi_transfer value_xfer
= {
73 spi_message_init(&msg
);
78 buffer
[2] = reg
& 0x7f;
79 index_xfer
.tx_buf
= buffer
;
80 spi_message_add_tail(&index_xfer
, &msg
);
86 value_xfer
.tx_buf
= buffer
+ 4;
87 spi_message_add_tail(&value_xfer
, &msg
);
89 return spi_sync(spi
, &msg
);
92 static void init_lb035q02_panel(struct spi_device
*spi
)
94 /* Init sequence from page 28 of the lb035q02 spec */
95 lb035q02_write_reg(spi
, 0x01, 0x6300);
96 lb035q02_write_reg(spi
, 0x02, 0x0200);
97 lb035q02_write_reg(spi
, 0x03, 0x0177);
98 lb035q02_write_reg(spi
, 0x04, 0x04c7);
99 lb035q02_write_reg(spi
, 0x05, 0xffc0);
100 lb035q02_write_reg(spi
, 0x06, 0xe806);
101 lb035q02_write_reg(spi
, 0x0a, 0x4008);
102 lb035q02_write_reg(spi
, 0x0b, 0x0000);
103 lb035q02_write_reg(spi
, 0x0d, 0x0030);
104 lb035q02_write_reg(spi
, 0x0e, 0x2800);
105 lb035q02_write_reg(spi
, 0x0f, 0x0000);
106 lb035q02_write_reg(spi
, 0x16, 0x9f80);
107 lb035q02_write_reg(spi
, 0x17, 0x0a0f);
108 lb035q02_write_reg(spi
, 0x1e, 0x00c1);
109 lb035q02_write_reg(spi
, 0x30, 0x0300);
110 lb035q02_write_reg(spi
, 0x31, 0x0007);
111 lb035q02_write_reg(spi
, 0x32, 0x0000);
112 lb035q02_write_reg(spi
, 0x33, 0x0000);
113 lb035q02_write_reg(spi
, 0x34, 0x0707);
114 lb035q02_write_reg(spi
, 0x35, 0x0004);
115 lb035q02_write_reg(spi
, 0x36, 0x0302);
116 lb035q02_write_reg(spi
, 0x37, 0x0202);
117 lb035q02_write_reg(spi
, 0x3a, 0x0a0d);
118 lb035q02_write_reg(spi
, 0x3b, 0x0806);
121 static int lb035q02_connect(struct omap_dss_device
*dssdev
)
123 struct panel_drv_data
*ddata
= to_panel_data(dssdev
);
124 struct omap_dss_device
*in
= ddata
->in
;
127 if (omapdss_device_is_connected(dssdev
))
130 r
= in
->ops
.dpi
->connect(in
, dssdev
);
134 init_lb035q02_panel(ddata
->spi
);
139 static void lb035q02_disconnect(struct omap_dss_device
*dssdev
)
141 struct panel_drv_data
*ddata
= to_panel_data(dssdev
);
142 struct omap_dss_device
*in
= ddata
->in
;
144 if (!omapdss_device_is_connected(dssdev
))
147 in
->ops
.dpi
->disconnect(in
, dssdev
);
150 static int lb035q02_enable(struct omap_dss_device
*dssdev
)
152 struct panel_drv_data
*ddata
= to_panel_data(dssdev
);
153 struct omap_dss_device
*in
= ddata
->in
;
156 if (!omapdss_device_is_connected(dssdev
))
159 if (omapdss_device_is_enabled(dssdev
))
162 if (ddata
->data_lines
)
163 in
->ops
.dpi
->set_data_lines(in
, ddata
->data_lines
);
164 in
->ops
.dpi
->set_timings(in
, &ddata
->videomode
);
166 r
= in
->ops
.dpi
->enable(in
);
170 if (ddata
->enable_gpio
)
171 gpiod_set_value_cansleep(ddata
->enable_gpio
, 1);
173 if (gpio_is_valid(ddata
->backlight_gpio
))
174 gpio_set_value_cansleep(ddata
->backlight_gpio
, 1);
176 dssdev
->state
= OMAP_DSS_DISPLAY_ACTIVE
;
181 static void lb035q02_disable(struct omap_dss_device
*dssdev
)
183 struct panel_drv_data
*ddata
= to_panel_data(dssdev
);
184 struct omap_dss_device
*in
= ddata
->in
;
186 if (!omapdss_device_is_enabled(dssdev
))
189 if (ddata
->enable_gpio
)
190 gpiod_set_value_cansleep(ddata
->enable_gpio
, 0);
192 if (gpio_is_valid(ddata
->backlight_gpio
))
193 gpio_set_value_cansleep(ddata
->backlight_gpio
, 0);
195 in
->ops
.dpi
->disable(in
);
197 dssdev
->state
= OMAP_DSS_DISPLAY_DISABLED
;
200 static void lb035q02_set_timings(struct omap_dss_device
*dssdev
,
201 struct omap_video_timings
*timings
)
203 struct panel_drv_data
*ddata
= to_panel_data(dssdev
);
204 struct omap_dss_device
*in
= ddata
->in
;
206 ddata
->videomode
= *timings
;
207 dssdev
->panel
.timings
= *timings
;
209 in
->ops
.dpi
->set_timings(in
, timings
);
212 static void lb035q02_get_timings(struct omap_dss_device
*dssdev
,
213 struct omap_video_timings
*timings
)
215 struct panel_drv_data
*ddata
= to_panel_data(dssdev
);
217 *timings
= ddata
->videomode
;
220 static int lb035q02_check_timings(struct omap_dss_device
*dssdev
,
221 struct omap_video_timings
*timings
)
223 struct panel_drv_data
*ddata
= to_panel_data(dssdev
);
224 struct omap_dss_device
*in
= ddata
->in
;
226 return in
->ops
.dpi
->check_timings(in
, timings
);
229 static struct omap_dss_driver lb035q02_ops
= {
230 .connect
= lb035q02_connect
,
231 .disconnect
= lb035q02_disconnect
,
233 .enable
= lb035q02_enable
,
234 .disable
= lb035q02_disable
,
236 .set_timings
= lb035q02_set_timings
,
237 .get_timings
= lb035q02_get_timings
,
238 .check_timings
= lb035q02_check_timings
,
240 .get_resolution
= omapdss_default_get_resolution
,
243 static int lb035q02_probe_pdata(struct spi_device
*spi
)
245 const struct panel_lb035q02_platform_data
*pdata
;
246 struct panel_drv_data
*ddata
= dev_get_drvdata(&spi
->dev
);
247 struct omap_dss_device
*dssdev
, *in
;
250 pdata
= dev_get_platdata(&spi
->dev
);
252 in
= omap_dss_find_output(pdata
->source
);
254 dev_err(&spi
->dev
, "failed to find video source '%s'\n",
256 return -EPROBE_DEFER
;
261 ddata
->data_lines
= pdata
->data_lines
;
263 dssdev
= &ddata
->dssdev
;
264 dssdev
->name
= pdata
->name
;
266 r
= devm_gpio_request_one(&spi
->dev
, pdata
->enable_gpio
,
267 GPIOF_OUT_INIT_LOW
, "panel enable");
271 ddata
->enable_gpio
= gpio_to_desc(pdata
->enable_gpio
);
273 ddata
->backlight_gpio
= pdata
->backlight_gpio
;
277 omap_dss_put_device(ddata
->in
);
281 static int lb035q02_probe_of(struct spi_device
*spi
)
283 struct device_node
*node
= spi
->dev
.of_node
;
284 struct panel_drv_data
*ddata
= dev_get_drvdata(&spi
->dev
);
285 struct omap_dss_device
*in
;
286 struct gpio_desc
*gpio
;
288 gpio
= devm_gpiod_get(&spi
->dev
, "enable", GPIOD_OUT_LOW
);
290 dev_err(&spi
->dev
, "failed to parse enable gpio\n");
291 return PTR_ERR(gpio
);
294 ddata
->enable_gpio
= gpio
;
296 ddata
->backlight_gpio
= -ENOENT
;
298 in
= omapdss_of_find_source_for_first_ep(node
);
300 dev_err(&spi
->dev
, "failed to find video source\n");
309 static int lb035q02_panel_spi_probe(struct spi_device
*spi
)
311 struct panel_drv_data
*ddata
;
312 struct omap_dss_device
*dssdev
;
315 ddata
= devm_kzalloc(&spi
->dev
, sizeof(*ddata
), GFP_KERNEL
);
319 dev_set_drvdata(&spi
->dev
, ddata
);
323 if (dev_get_platdata(&spi
->dev
)) {
324 r
= lb035q02_probe_pdata(spi
);
327 } else if (spi
->dev
.of_node
) {
328 r
= lb035q02_probe_of(spi
);
335 if (gpio_is_valid(ddata
->backlight_gpio
)) {
336 r
= devm_gpio_request_one(&spi
->dev
, ddata
->backlight_gpio
,
337 GPIOF_OUT_INIT_LOW
, "panel backlight");
342 ddata
->videomode
= lb035q02_timings
;
344 dssdev
= &ddata
->dssdev
;
345 dssdev
->dev
= &spi
->dev
;
346 dssdev
->driver
= &lb035q02_ops
;
347 dssdev
->type
= OMAP_DISPLAY_TYPE_DPI
;
348 dssdev
->owner
= THIS_MODULE
;
349 dssdev
->panel
.timings
= ddata
->videomode
;
350 dssdev
->phy
.dpi
.data_lines
= ddata
->data_lines
;
352 r
= omapdss_register_display(dssdev
);
354 dev_err(&spi
->dev
, "Failed to register panel\n");
362 omap_dss_put_device(ddata
->in
);
366 static int lb035q02_panel_spi_remove(struct spi_device
*spi
)
368 struct panel_drv_data
*ddata
= dev_get_drvdata(&spi
->dev
);
369 struct omap_dss_device
*dssdev
= &ddata
->dssdev
;
370 struct omap_dss_device
*in
= ddata
->in
;
372 omapdss_unregister_display(dssdev
);
374 lb035q02_disable(dssdev
);
375 lb035q02_disconnect(dssdev
);
377 omap_dss_put_device(in
);
382 static const struct of_device_id lb035q02_of_match
[] = {
383 { .compatible
= "omapdss,lgphilips,lb035q02", },
387 MODULE_DEVICE_TABLE(of
, lb035q02_of_match
);
389 static struct spi_driver lb035q02_spi_driver
= {
390 .probe
= lb035q02_panel_spi_probe
,
391 .remove
= lb035q02_panel_spi_remove
,
393 .name
= "panel_lgphilips_lb035q02",
394 .owner
= THIS_MODULE
,
395 .of_match_table
= lb035q02_of_match
,
396 .suppress_bind_attrs
= true,
400 module_spi_driver(lb035q02_spi_driver
);
402 MODULE_ALIAS("spi:lgphilips,lb035q02");
403 MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
404 MODULE_DESCRIPTION("LG.Philips LB035Q02 LCD Panel driver");
405 MODULE_LICENSE("GPL");