2 * LCD panel driver for Sharp LS037V7DW01
4 * Copyright (C) 2013 Texas Instruments
5 * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License version 2 as published by
9 * the Free Software Foundation.
12 #include <linux/delay.h>
13 #include <linux/gpio.h>
14 #include <linux/module.h>
15 #include <linux/platform_device.h>
16 #include <linux/slab.h>
18 #include <video/omapdss.h>
19 #include <video/omap-panel-data.h>
21 struct panel_drv_data {
22 struct omap_dss_device dssdev;
23 struct omap_dss_device *in;
27 struct omap_video_timings videomode;
36 static const struct omap_video_timings sharp_ls_timings = {
40 .pixelclock = 19200000,
50 .vsync_level = OMAPDSS_SIG_ACTIVE_LOW,
51 .hsync_level = OMAPDSS_SIG_ACTIVE_LOW,
52 .data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE,
53 .de_level = OMAPDSS_SIG_ACTIVE_HIGH,
54 .sync_pclk_edge = OMAPDSS_DRIVE_SIG_OPPOSITE_EDGES,
57 #define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)
59 static int sharp_ls_connect(struct omap_dss_device *dssdev)
61 struct panel_drv_data *ddata = to_panel_data(dssdev);
62 struct omap_dss_device *in = ddata->in;
65 if (omapdss_device_is_connected(dssdev))
68 r = in->ops.dpi->connect(in, dssdev);
75 static void sharp_ls_disconnect(struct omap_dss_device *dssdev)
77 struct panel_drv_data *ddata = to_panel_data(dssdev);
78 struct omap_dss_device *in = ddata->in;
80 if (!omapdss_device_is_connected(dssdev))
83 in->ops.dpi->disconnect(in, dssdev);
86 static int sharp_ls_enable(struct omap_dss_device *dssdev)
88 struct panel_drv_data *ddata = to_panel_data(dssdev);
89 struct omap_dss_device *in = ddata->in;
92 if (!omapdss_device_is_connected(dssdev))
95 if (omapdss_device_is_enabled(dssdev))
98 in->ops.dpi->set_data_lines(in, ddata->data_lines);
99 in->ops.dpi->set_timings(in, &ddata->videomode);
101 r = in->ops.dpi->enable(in);
105 /* wait couple of vsyncs until enabling the LCD */
108 if (gpio_is_valid(ddata->resb_gpio))
109 gpio_set_value_cansleep(ddata->resb_gpio, 1);
111 if (gpio_is_valid(ddata->ini_gpio))
112 gpio_set_value_cansleep(ddata->ini_gpio, 1);
114 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
119 static void sharp_ls_disable(struct omap_dss_device *dssdev)
121 struct panel_drv_data *ddata = to_panel_data(dssdev);
122 struct omap_dss_device *in = ddata->in;
124 if (!omapdss_device_is_enabled(dssdev))
127 if (gpio_is_valid(ddata->ini_gpio))
128 gpio_set_value_cansleep(ddata->ini_gpio, 0);
130 if (gpio_is_valid(ddata->resb_gpio))
131 gpio_set_value_cansleep(ddata->resb_gpio, 0);
133 /* wait at least 5 vsyncs after disabling the LCD */
137 in->ops.dpi->disable(in);
139 dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
142 static void sharp_ls_set_timings(struct omap_dss_device *dssdev,
143 struct omap_video_timings *timings)
145 struct panel_drv_data *ddata = to_panel_data(dssdev);
146 struct omap_dss_device *in = ddata->in;
148 ddata->videomode = *timings;
149 dssdev->panel.timings = *timings;
151 in->ops.dpi->set_timings(in, timings);
154 static void sharp_ls_get_timings(struct omap_dss_device *dssdev,
155 struct omap_video_timings *timings)
157 struct panel_drv_data *ddata = to_panel_data(dssdev);
159 *timings = ddata->videomode;
162 static int sharp_ls_check_timings(struct omap_dss_device *dssdev,
163 struct omap_video_timings *timings)
165 struct panel_drv_data *ddata = to_panel_data(dssdev);
166 struct omap_dss_device *in = ddata->in;
168 return in->ops.dpi->check_timings(in, timings);
171 static struct omap_dss_driver sharp_ls_ops = {
172 .connect = sharp_ls_connect,
173 .disconnect = sharp_ls_disconnect,
175 .enable = sharp_ls_enable,
176 .disable = sharp_ls_disable,
178 .set_timings = sharp_ls_set_timings,
179 .get_timings = sharp_ls_get_timings,
180 .check_timings = sharp_ls_check_timings,
182 .get_resolution = omapdss_default_get_resolution,
185 static int sharp_ls_probe_pdata(struct platform_device *pdev)
187 const struct panel_sharp_ls037v7dw01_platform_data *pdata;
188 struct panel_drv_data *ddata = platform_get_drvdata(pdev);
189 struct omap_dss_device *dssdev, *in;
191 pdata = dev_get_platdata(&pdev->dev);
193 in = omap_dss_find_output(pdata->source);
195 dev_err(&pdev->dev, "failed to find video source '%s'\n",
197 return -EPROBE_DEFER;
202 ddata->data_lines = pdata->data_lines;
204 dssdev = &ddata->dssdev;
205 dssdev->name = pdata->name;
207 ddata->resb_gpio = pdata->resb_gpio;
208 ddata->ini_gpio = pdata->ini_gpio;
209 ddata->mo_gpio = pdata->mo_gpio;
210 ddata->lr_gpio = pdata->lr_gpio;
211 ddata->ud_gpio = pdata->ud_gpio;
216 static int sharp_ls_probe(struct platform_device *pdev)
218 struct panel_drv_data *ddata;
219 struct omap_dss_device *dssdev;
222 ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
226 platform_set_drvdata(pdev, ddata);
228 if (dev_get_platdata(&pdev->dev)) {
229 r = sharp_ls_probe_pdata(pdev);
236 if (gpio_is_valid(ddata->mo_gpio)) {
237 r = devm_gpio_request_one(&pdev->dev, ddata->mo_gpio,
238 GPIOF_OUT_INIT_LOW, "lcd MO");
243 if (gpio_is_valid(ddata->lr_gpio)) {
244 r = devm_gpio_request_one(&pdev->dev, ddata->lr_gpio,
245 GPIOF_OUT_INIT_HIGH, "lcd LR");
250 if (gpio_is_valid(ddata->ud_gpio)) {
251 r = devm_gpio_request_one(&pdev->dev, ddata->ud_gpio,
252 GPIOF_OUT_INIT_HIGH, "lcd UD");
257 if (gpio_is_valid(ddata->resb_gpio)) {
258 r = devm_gpio_request_one(&pdev->dev, ddata->resb_gpio,
259 GPIOF_OUT_INIT_LOW, "lcd RESB");
264 if (gpio_is_valid(ddata->ini_gpio)) {
265 r = devm_gpio_request_one(&pdev->dev, ddata->ini_gpio,
266 GPIOF_OUT_INIT_LOW, "lcd INI");
271 ddata->videomode = sharp_ls_timings;
273 dssdev = &ddata->dssdev;
274 dssdev->dev = &pdev->dev;
275 dssdev->driver = &sharp_ls_ops;
276 dssdev->type = OMAP_DISPLAY_TYPE_DPI;
277 dssdev->owner = THIS_MODULE;
278 dssdev->panel.timings = ddata->videomode;
279 dssdev->phy.dpi.data_lines = ddata->data_lines;
281 r = omapdss_register_display(dssdev);
283 dev_err(&pdev->dev, "Failed to register panel\n");
291 omap_dss_put_device(ddata->in);
295 static int __exit sharp_ls_remove(struct platform_device *pdev)
297 struct panel_drv_data *ddata = platform_get_drvdata(pdev);
298 struct omap_dss_device *dssdev = &ddata->dssdev;
299 struct omap_dss_device *in = ddata->in;
301 omapdss_unregister_display(dssdev);
303 sharp_ls_disable(dssdev);
304 sharp_ls_disconnect(dssdev);
306 omap_dss_put_device(in);
311 static struct platform_driver sharp_ls_driver = {
312 .probe = sharp_ls_probe,
313 .remove = __exit_p(sharp_ls_remove),
315 .name = "panel-sharp-ls037v7dw01",
316 .owner = THIS_MODULE,
320 module_platform_driver(sharp_ls_driver);
322 MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
323 MODULE_DESCRIPTION("Sharp LS037V7DW01 Panel Driver");
324 MODULE_LICENSE("GPL");