1d2912cb1SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only
2f76ee892STomi Valkeinen /*
3f76ee892STomi Valkeinen * Generic MIPI DPI Panel Driver
4f76ee892STomi Valkeinen *
5f76ee892STomi Valkeinen * Copyright (C) 2013 Texas Instruments
6f76ee892STomi Valkeinen * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
7f76ee892STomi Valkeinen */
8f76ee892STomi Valkeinen
9*b7ec002cSDmitry Torokhov #include <linux/gpio/consumer.h>
10f76ee892STomi Valkeinen #include <linux/module.h>
11f76ee892STomi Valkeinen #include <linux/platform_device.h>
12f76ee892STomi Valkeinen #include <linux/slab.h>
13f76ee892STomi Valkeinen #include <linux/of.h>
14f76ee892STomi Valkeinen
1562d9e44eSPeter Ujfalusi #include <video/omapfb_dss.h>
16f76ee892STomi Valkeinen #include <video/of_display_timing.h>
17f76ee892STomi Valkeinen
18f76ee892STomi Valkeinen struct panel_drv_data {
19f76ee892STomi Valkeinen struct omap_dss_device dssdev;
20f76ee892STomi Valkeinen struct omap_dss_device *in;
21f76ee892STomi Valkeinen
22f76ee892STomi Valkeinen int data_lines;
23f76ee892STomi Valkeinen
24f76ee892STomi Valkeinen struct omap_video_timings videomode;
25f76ee892STomi Valkeinen
26f76ee892STomi Valkeinen struct gpio_desc *enable_gpio;
27f76ee892STomi Valkeinen };
28f76ee892STomi Valkeinen
29f76ee892STomi Valkeinen #define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)
30f76ee892STomi Valkeinen
panel_dpi_connect(struct omap_dss_device * dssdev)31f76ee892STomi Valkeinen static int panel_dpi_connect(struct omap_dss_device *dssdev)
32f76ee892STomi Valkeinen {
33f76ee892STomi Valkeinen struct panel_drv_data *ddata = to_panel_data(dssdev);
34f76ee892STomi Valkeinen struct omap_dss_device *in = ddata->in;
35f76ee892STomi Valkeinen
36f76ee892STomi Valkeinen if (omapdss_device_is_connected(dssdev))
37f76ee892STomi Valkeinen return 0;
38f76ee892STomi Valkeinen
39ef27afa6SLiu Shixin return in->ops.dpi->connect(in, dssdev);
40f76ee892STomi Valkeinen }
41f76ee892STomi Valkeinen
panel_dpi_disconnect(struct omap_dss_device * dssdev)42f76ee892STomi Valkeinen static void panel_dpi_disconnect(struct omap_dss_device *dssdev)
43f76ee892STomi Valkeinen {
44f76ee892STomi Valkeinen struct panel_drv_data *ddata = to_panel_data(dssdev);
45f76ee892STomi Valkeinen struct omap_dss_device *in = ddata->in;
46f76ee892STomi Valkeinen
47f76ee892STomi Valkeinen if (!omapdss_device_is_connected(dssdev))
48f76ee892STomi Valkeinen return;
49f76ee892STomi Valkeinen
50f76ee892STomi Valkeinen in->ops.dpi->disconnect(in, dssdev);
51f76ee892STomi Valkeinen }
52f76ee892STomi Valkeinen
panel_dpi_enable(struct omap_dss_device * dssdev)53f76ee892STomi Valkeinen static int panel_dpi_enable(struct omap_dss_device *dssdev)
54f76ee892STomi Valkeinen {
55f76ee892STomi Valkeinen struct panel_drv_data *ddata = to_panel_data(dssdev);
56f76ee892STomi Valkeinen struct omap_dss_device *in = ddata->in;
57f76ee892STomi Valkeinen int r;
58f76ee892STomi Valkeinen
59f76ee892STomi Valkeinen if (!omapdss_device_is_connected(dssdev))
60f76ee892STomi Valkeinen return -ENODEV;
61f76ee892STomi Valkeinen
62f76ee892STomi Valkeinen if (omapdss_device_is_enabled(dssdev))
63f76ee892STomi Valkeinen return 0;
64f76ee892STomi Valkeinen
65f76ee892STomi Valkeinen if (ddata->data_lines)
66f76ee892STomi Valkeinen in->ops.dpi->set_data_lines(in, ddata->data_lines);
67f76ee892STomi Valkeinen in->ops.dpi->set_timings(in, &ddata->videomode);
68f76ee892STomi Valkeinen
69f76ee892STomi Valkeinen r = in->ops.dpi->enable(in);
70f76ee892STomi Valkeinen if (r)
71f76ee892STomi Valkeinen return r;
72f76ee892STomi Valkeinen
73f76ee892STomi Valkeinen gpiod_set_value_cansleep(ddata->enable_gpio, 1);
74f76ee892STomi Valkeinen
75f76ee892STomi Valkeinen dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
76f76ee892STomi Valkeinen
77f76ee892STomi Valkeinen return 0;
78f76ee892STomi Valkeinen }
79f76ee892STomi Valkeinen
panel_dpi_disable(struct omap_dss_device * dssdev)80f76ee892STomi Valkeinen static void panel_dpi_disable(struct omap_dss_device *dssdev)
81f76ee892STomi Valkeinen {
82f76ee892STomi Valkeinen struct panel_drv_data *ddata = to_panel_data(dssdev);
83f76ee892STomi Valkeinen struct omap_dss_device *in = ddata->in;
84f76ee892STomi Valkeinen
85f76ee892STomi Valkeinen if (!omapdss_device_is_enabled(dssdev))
86f76ee892STomi Valkeinen return;
87f76ee892STomi Valkeinen
88f76ee892STomi Valkeinen gpiod_set_value_cansleep(ddata->enable_gpio, 0);
89f76ee892STomi Valkeinen
90f76ee892STomi Valkeinen in->ops.dpi->disable(in);
91f76ee892STomi Valkeinen
92f76ee892STomi Valkeinen dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
93f76ee892STomi Valkeinen }
94f76ee892STomi Valkeinen
panel_dpi_set_timings(struct omap_dss_device * dssdev,struct omap_video_timings * timings)95f76ee892STomi Valkeinen static void panel_dpi_set_timings(struct omap_dss_device *dssdev,
96f76ee892STomi Valkeinen struct omap_video_timings *timings)
97f76ee892STomi Valkeinen {
98f76ee892STomi Valkeinen struct panel_drv_data *ddata = to_panel_data(dssdev);
99f76ee892STomi Valkeinen struct omap_dss_device *in = ddata->in;
100f76ee892STomi Valkeinen
101f76ee892STomi Valkeinen ddata->videomode = *timings;
102f76ee892STomi Valkeinen dssdev->panel.timings = *timings;
103f76ee892STomi Valkeinen
104f76ee892STomi Valkeinen in->ops.dpi->set_timings(in, timings);
105f76ee892STomi Valkeinen }
106f76ee892STomi Valkeinen
panel_dpi_get_timings(struct omap_dss_device * dssdev,struct omap_video_timings * timings)107f76ee892STomi Valkeinen static void panel_dpi_get_timings(struct omap_dss_device *dssdev,
108f76ee892STomi Valkeinen struct omap_video_timings *timings)
109f76ee892STomi Valkeinen {
110f76ee892STomi Valkeinen struct panel_drv_data *ddata = to_panel_data(dssdev);
111f76ee892STomi Valkeinen
112f76ee892STomi Valkeinen *timings = ddata->videomode;
113f76ee892STomi Valkeinen }
114f76ee892STomi Valkeinen
panel_dpi_check_timings(struct omap_dss_device * dssdev,struct omap_video_timings * timings)115f76ee892STomi Valkeinen static int panel_dpi_check_timings(struct omap_dss_device *dssdev,
116f76ee892STomi Valkeinen struct omap_video_timings *timings)
117f76ee892STomi Valkeinen {
118f76ee892STomi Valkeinen struct panel_drv_data *ddata = to_panel_data(dssdev);
119f76ee892STomi Valkeinen struct omap_dss_device *in = ddata->in;
120f76ee892STomi Valkeinen
121f76ee892STomi Valkeinen return in->ops.dpi->check_timings(in, timings);
122f76ee892STomi Valkeinen }
123f76ee892STomi Valkeinen
124f76ee892STomi Valkeinen static struct omap_dss_driver panel_dpi_ops = {
125f76ee892STomi Valkeinen .connect = panel_dpi_connect,
126f76ee892STomi Valkeinen .disconnect = panel_dpi_disconnect,
127f76ee892STomi Valkeinen
128f76ee892STomi Valkeinen .enable = panel_dpi_enable,
129f76ee892STomi Valkeinen .disable = panel_dpi_disable,
130f76ee892STomi Valkeinen
131f76ee892STomi Valkeinen .set_timings = panel_dpi_set_timings,
132f76ee892STomi Valkeinen .get_timings = panel_dpi_get_timings,
133f76ee892STomi Valkeinen .check_timings = panel_dpi_check_timings,
134f76ee892STomi Valkeinen
135f76ee892STomi Valkeinen .get_resolution = omapdss_default_get_resolution,
136f76ee892STomi Valkeinen };
137f76ee892STomi Valkeinen
panel_dpi_probe_of(struct platform_device * pdev)138f76ee892STomi Valkeinen static int panel_dpi_probe_of(struct platform_device *pdev)
139f76ee892STomi Valkeinen {
140f76ee892STomi Valkeinen struct panel_drv_data *ddata = platform_get_drvdata(pdev);
141f76ee892STomi Valkeinen struct device_node *node = pdev->dev.of_node;
142f76ee892STomi Valkeinen struct omap_dss_device *in;
143f76ee892STomi Valkeinen int r;
144f76ee892STomi Valkeinen struct display_timing timing;
145f76ee892STomi Valkeinen struct videomode vm;
146f76ee892STomi Valkeinen struct gpio_desc *gpio;
147f76ee892STomi Valkeinen
148f76ee892STomi Valkeinen gpio = devm_gpiod_get_optional(&pdev->dev, "enable", GPIOD_OUT_LOW);
149f76ee892STomi Valkeinen if (IS_ERR(gpio))
150f76ee892STomi Valkeinen return PTR_ERR(gpio);
151f76ee892STomi Valkeinen
152f76ee892STomi Valkeinen ddata->enable_gpio = gpio;
153f76ee892STomi Valkeinen
154f76ee892STomi Valkeinen r = of_get_display_timing(node, "panel-timing", &timing);
155f76ee892STomi Valkeinen if (r) {
156f76ee892STomi Valkeinen dev_err(&pdev->dev, "failed to get video timing\n");
157f76ee892STomi Valkeinen return r;
158f76ee892STomi Valkeinen }
159f76ee892STomi Valkeinen
160f76ee892STomi Valkeinen videomode_from_timing(&timing, &vm);
161f76ee892STomi Valkeinen videomode_to_omap_video_timings(&vm, &ddata->videomode);
162f76ee892STomi Valkeinen
163f76ee892STomi Valkeinen in = omapdss_of_find_source_for_first_ep(node);
164f76ee892STomi Valkeinen if (IS_ERR(in)) {
165f76ee892STomi Valkeinen dev_err(&pdev->dev, "failed to find video source\n");
166f76ee892STomi Valkeinen return PTR_ERR(in);
167f76ee892STomi Valkeinen }
168f76ee892STomi Valkeinen
169f76ee892STomi Valkeinen ddata->in = in;
170f76ee892STomi Valkeinen
171f76ee892STomi Valkeinen return 0;
172f76ee892STomi Valkeinen }
173f76ee892STomi Valkeinen
panel_dpi_probe(struct platform_device * pdev)174f76ee892STomi Valkeinen static int panel_dpi_probe(struct platform_device *pdev)
175f76ee892STomi Valkeinen {
176f76ee892STomi Valkeinen struct panel_drv_data *ddata;
177f76ee892STomi Valkeinen struct omap_dss_device *dssdev;
178f76ee892STomi Valkeinen int r;
179f76ee892STomi Valkeinen
180*b7ec002cSDmitry Torokhov if (!pdev->dev.of_node)
181*b7ec002cSDmitry Torokhov return -ENODEV;
182*b7ec002cSDmitry Torokhov
183f76ee892STomi Valkeinen ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
184f76ee892STomi Valkeinen if (ddata == NULL)
185f76ee892STomi Valkeinen return -ENOMEM;
186f76ee892STomi Valkeinen
187f76ee892STomi Valkeinen platform_set_drvdata(pdev, ddata);
188f76ee892STomi Valkeinen
189f76ee892STomi Valkeinen r = panel_dpi_probe_of(pdev);
190f76ee892STomi Valkeinen if (r)
191f76ee892STomi Valkeinen return r;
192f76ee892STomi Valkeinen
193f76ee892STomi Valkeinen dssdev = &ddata->dssdev;
194f76ee892STomi Valkeinen dssdev->dev = &pdev->dev;
195f76ee892STomi Valkeinen dssdev->driver = &panel_dpi_ops;
196f76ee892STomi Valkeinen dssdev->type = OMAP_DISPLAY_TYPE_DPI;
197f76ee892STomi Valkeinen dssdev->owner = THIS_MODULE;
198f76ee892STomi Valkeinen dssdev->panel.timings = ddata->videomode;
199f76ee892STomi Valkeinen dssdev->phy.dpi.data_lines = ddata->data_lines;
200f76ee892STomi Valkeinen
201f76ee892STomi Valkeinen r = omapdss_register_display(dssdev);
202f76ee892STomi Valkeinen if (r) {
203f76ee892STomi Valkeinen dev_err(&pdev->dev, "Failed to register panel\n");
204f76ee892STomi Valkeinen goto err_reg;
205f76ee892STomi Valkeinen }
206f76ee892STomi Valkeinen
207f76ee892STomi Valkeinen return 0;
208f76ee892STomi Valkeinen
209f76ee892STomi Valkeinen err_reg:
210f76ee892STomi Valkeinen omap_dss_put_device(ddata->in);
211f76ee892STomi Valkeinen return r;
212f76ee892STomi Valkeinen }
213f76ee892STomi Valkeinen
panel_dpi_remove(struct platform_device * pdev)214f76ee892STomi Valkeinen static int __exit panel_dpi_remove(struct platform_device *pdev)
215f76ee892STomi Valkeinen {
216f76ee892STomi Valkeinen struct panel_drv_data *ddata = platform_get_drvdata(pdev);
217f76ee892STomi Valkeinen struct omap_dss_device *dssdev = &ddata->dssdev;
218f76ee892STomi Valkeinen struct omap_dss_device *in = ddata->in;
219f76ee892STomi Valkeinen
220f76ee892STomi Valkeinen omapdss_unregister_display(dssdev);
221f76ee892STomi Valkeinen
222f76ee892STomi Valkeinen panel_dpi_disable(dssdev);
223f76ee892STomi Valkeinen panel_dpi_disconnect(dssdev);
224f76ee892STomi Valkeinen
225f76ee892STomi Valkeinen omap_dss_put_device(in);
226f76ee892STomi Valkeinen
227f76ee892STomi Valkeinen return 0;
228f76ee892STomi Valkeinen }
229f76ee892STomi Valkeinen
230f76ee892STomi Valkeinen static const struct of_device_id panel_dpi_of_match[] = {
231f76ee892STomi Valkeinen { .compatible = "omapdss,panel-dpi", },
232f76ee892STomi Valkeinen {},
233f76ee892STomi Valkeinen };
234f76ee892STomi Valkeinen
235f76ee892STomi Valkeinen MODULE_DEVICE_TABLE(of, panel_dpi_of_match);
236f76ee892STomi Valkeinen
237f76ee892STomi Valkeinen static struct platform_driver panel_dpi_driver = {
238f76ee892STomi Valkeinen .probe = panel_dpi_probe,
239f76ee892STomi Valkeinen .remove = __exit_p(panel_dpi_remove),
240f76ee892STomi Valkeinen .driver = {
241f76ee892STomi Valkeinen .name = "panel-dpi",
242f76ee892STomi Valkeinen .of_match_table = panel_dpi_of_match,
243f76ee892STomi Valkeinen .suppress_bind_attrs = true,
244f76ee892STomi Valkeinen },
245f76ee892STomi Valkeinen };
246f76ee892STomi Valkeinen
247f76ee892STomi Valkeinen module_platform_driver(panel_dpi_driver);
248f76ee892STomi Valkeinen
249f76ee892STomi Valkeinen MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
250f76ee892STomi Valkeinen MODULE_DESCRIPTION("Generic MIPI DPI Panel Driver");
251f76ee892STomi Valkeinen MODULE_LICENSE("GPL");
252