2 * LCD panel driver for LG.Philips LB035Q02
4 * Author: Steve Sakoman <steve@sakoman.com>
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 as published by
8 * the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * You should have received a copy of the GNU General Public License along with
16 * this program. If not, see <http://www.gnu.org/licenses/>.
19 #include <linux/module.h>
20 #include <linux/delay.h>
21 #include <linux/spi/spi.h>
22 #include <linux/mutex.h>
23 #include <linux/gpio.h>
25 #include <video/omapdss.h>
26 #include <video/omap-panel-data.h>
28 struct lb035q02_data {
32 static struct omap_video_timings lb035q02_timings = {
46 .vsync_level = OMAPDSS_SIG_ACTIVE_LOW,
47 .hsync_level = OMAPDSS_SIG_ACTIVE_LOW,
48 .data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE,
49 .de_level = OMAPDSS_SIG_ACTIVE_HIGH,
50 .sync_pclk_edge = OMAPDSS_DRIVE_SIG_OPPOSITE_EDGES,
53 static inline struct panel_generic_dpi_data
54 *get_panel_data(const struct omap_dss_device *dssdev)
56 return (struct panel_generic_dpi_data *) dssdev->data;
59 static int lb035q02_panel_power_on(struct omap_dss_device *dssdev)
61 struct panel_generic_dpi_data *panel_data = get_panel_data(dssdev);
64 if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
67 omapdss_dpi_set_timings(dssdev, &dssdev->panel.timings);
68 omapdss_dpi_set_data_lines(dssdev, dssdev->phy.dpi.data_lines);
70 r = omapdss_dpi_display_enable(dssdev);
74 for (i = 0; i < panel_data->num_gpios; ++i) {
75 gpio_set_value_cansleep(panel_data->gpios[i],
76 panel_data->gpio_invert[i] ? 0 : 1);
85 static void lb035q02_panel_power_off(struct omap_dss_device *dssdev)
87 struct panel_generic_dpi_data *panel_data = get_panel_data(dssdev);
90 if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
93 for (i = panel_data->num_gpios - 1; i >= 0; --i) {
94 gpio_set_value_cansleep(panel_data->gpios[i],
95 panel_data->gpio_invert[i] ? 1 : 0);
98 omapdss_dpi_display_disable(dssdev);
101 static int lb035q02_panel_probe(struct omap_dss_device *dssdev)
103 struct panel_generic_dpi_data *panel_data = get_panel_data(dssdev);
104 struct lb035q02_data *ld;
110 dssdev->panel.timings = lb035q02_timings;
112 ld = devm_kzalloc(dssdev->dev, sizeof(*ld), GFP_KERNEL);
116 for (i = 0; i < panel_data->num_gpios; ++i) {
117 r = devm_gpio_request_one(dssdev->dev, panel_data->gpios[i],
118 panel_data->gpio_invert[i] ?
119 GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW,
125 mutex_init(&ld->lock);
126 dev_set_drvdata(dssdev->dev, ld);
131 static void lb035q02_panel_remove(struct omap_dss_device *dssdev)
135 static int lb035q02_panel_enable(struct omap_dss_device *dssdev)
137 struct lb035q02_data *ld = dev_get_drvdata(dssdev->dev);
140 mutex_lock(&ld->lock);
142 r = lb035q02_panel_power_on(dssdev);
145 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
147 mutex_unlock(&ld->lock);
150 mutex_unlock(&ld->lock);
154 static void lb035q02_panel_disable(struct omap_dss_device *dssdev)
156 struct lb035q02_data *ld = dev_get_drvdata(dssdev->dev);
158 mutex_lock(&ld->lock);
160 lb035q02_panel_power_off(dssdev);
161 dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
163 mutex_unlock(&ld->lock);
166 static struct omap_dss_driver lb035q02_driver = {
167 .probe = lb035q02_panel_probe,
168 .remove = lb035q02_panel_remove,
170 .enable = lb035q02_panel_enable,
171 .disable = lb035q02_panel_disable,
174 .name = "lgphilips_lb035q02_panel",
175 .owner = THIS_MODULE,
179 static int lb035q02_write_reg(struct spi_device *spi, u8 reg, u16 val)
181 struct spi_message msg;
182 struct spi_transfer index_xfer = {
186 struct spi_transfer value_xfer = {
191 spi_message_init(&msg);
196 buffer[2] = reg & 0x7f;
197 index_xfer.tx_buf = buffer;
198 spi_message_add_tail(&index_xfer, &msg);
202 buffer[5] = val >> 8;
204 value_xfer.tx_buf = buffer + 4;
205 spi_message_add_tail(&value_xfer, &msg);
207 return spi_sync(spi, &msg);
210 static void init_lb035q02_panel(struct spi_device *spi)
212 /* Init sequence from page 28 of the lb035q02 spec */
213 lb035q02_write_reg(spi, 0x01, 0x6300);
214 lb035q02_write_reg(spi, 0x02, 0x0200);
215 lb035q02_write_reg(spi, 0x03, 0x0177);
216 lb035q02_write_reg(spi, 0x04, 0x04c7);
217 lb035q02_write_reg(spi, 0x05, 0xffc0);
218 lb035q02_write_reg(spi, 0x06, 0xe806);
219 lb035q02_write_reg(spi, 0x0a, 0x4008);
220 lb035q02_write_reg(spi, 0x0b, 0x0000);
221 lb035q02_write_reg(spi, 0x0d, 0x0030);
222 lb035q02_write_reg(spi, 0x0e, 0x2800);
223 lb035q02_write_reg(spi, 0x0f, 0x0000);
224 lb035q02_write_reg(spi, 0x16, 0x9f80);
225 lb035q02_write_reg(spi, 0x17, 0x0a0f);
226 lb035q02_write_reg(spi, 0x1e, 0x00c1);
227 lb035q02_write_reg(spi, 0x30, 0x0300);
228 lb035q02_write_reg(spi, 0x31, 0x0007);
229 lb035q02_write_reg(spi, 0x32, 0x0000);
230 lb035q02_write_reg(spi, 0x33, 0x0000);
231 lb035q02_write_reg(spi, 0x34, 0x0707);
232 lb035q02_write_reg(spi, 0x35, 0x0004);
233 lb035q02_write_reg(spi, 0x36, 0x0302);
234 lb035q02_write_reg(spi, 0x37, 0x0202);
235 lb035q02_write_reg(spi, 0x3a, 0x0a0d);
236 lb035q02_write_reg(spi, 0x3b, 0x0806);
239 static int lb035q02_panel_spi_probe(struct spi_device *spi)
241 init_lb035q02_panel(spi);
242 return omap_dss_register_driver(&lb035q02_driver);
245 static int lb035q02_panel_spi_remove(struct spi_device *spi)
247 omap_dss_unregister_driver(&lb035q02_driver);
251 static struct spi_driver lb035q02_spi_driver = {
253 .name = "lgphilips_lb035q02_panel-spi",
254 .owner = THIS_MODULE,
256 .probe = lb035q02_panel_spi_probe,
257 .remove = lb035q02_panel_spi_remove,
260 module_spi_driver(lb035q02_spi_driver);
262 MODULE_LICENSE("GPL");