projects/linux·blob master · refs

133 lines · 3.3 KiB

1// SPDX-License-Identifier: GPL-2.0-only
2
3#include <linux/backlight.h>
4#include <linux/property.h>
5#include <drm/drm_device.h>
6#include <drm/drm_mipi_dsi.h>
7#include <drm/drm_mode.h>
8#include <drm/drm_modes.h>
9#include <drm/drm_panel.h>
10#include <drm/drm_probe_helper.h>
11#include <video/mipi_display.h>
12
13struct summit_data {
14 struct mipi_dsi_device *dsi;
15 struct backlight_device *bl;
16 struct drm_panel panel;
17};
18
19static int summit_set_brightness(struct device *dev)
20{
21 struct summit_data *s_data = dev_get_drvdata(dev);
22 int level = backlight_get_brightness(s_data->bl);
23
24 return mipi_dsi_dcs_set_display_brightness(s_data->dsi, level);
25}
26
27static int summit_bl_update_status(struct backlight_device *dev)
28{
29 return summit_set_brightness(&dev->dev);
30}
31
32static const struct backlight_ops summit_bl_ops = {
33 .update_status = summit_bl_update_status,
34};
35
36static struct drm_display_mode summit_mode = {
37 .vdisplay = 2008,
38 .hdisplay = 60,
39 .hsync_start = 60 + 8,
40 .hsync_end = 60 + 8 + 80,
41 .htotal = 60 + 8 + 80 + 40,
42 .vsync_start = 2008 + 1,
43 .vsync_end = 2008 + 1 + 15,
44 .vtotal = 2008 + 1 + 15 + 6,
45 .clock = ((60 + 8 + 80 + 40) * (2008 + 1 + 15 + 6) * 60) / 1000,
46 .type = DRM_MODE_TYPE_DRIVER,
47 .flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC,
48};
49
50static int summit_get_modes(struct drm_panel *panel,
51 struct drm_connector *connector)
52{
53 connector->display_info.non_desktop = true;
54 drm_object_property_set_value(&connector->base,
55 connector->dev->mode_config.non_desktop_property,
56 connector->display_info.non_desktop);
57
58 return drm_connector_helper_get_modes_fixed(connector, &summit_mode);
59}
60
61static const struct drm_panel_funcs summit_panel_funcs = {
62 .get_modes = summit_get_modes,
63};
64
65static int summit_probe(struct mipi_dsi_device *dsi)
66{
67 struct backlight_properties props = { 0 };
68 struct device *dev = &dsi->dev;
69 struct summit_data *s_data;
70 int ret;
71
72 s_data = devm_drm_panel_alloc(dev, struct summit_data, panel,
73 &summit_panel_funcs,
74 DRM_MODE_CONNECTOR_DSI);
75 if (IS_ERR(s_data))
76 return PTR_ERR(s_data);
77
78 mipi_dsi_set_drvdata(dsi, s_data);
79 s_data->dsi = dsi;
80
81 ret = device_property_read_u32(dev, "max-brightness", &props.max_brightness);
82 if (ret)
83 return ret;
84 props.type = BACKLIGHT_RAW;
85
86 s_data->bl = devm_backlight_device_register(dev, dev_name(dev),
87 dev, s_data, &summit_bl_ops, &props);
88 if (IS_ERR(s_data->bl))
89 return PTR_ERR(s_data->bl);
90
91 drm_panel_add(&s_data->panel);
92
93 return mipi_dsi_attach(dsi);
94}
95
96static void summit_remove(struct mipi_dsi_device *dsi)
97{
98 struct summit_data *s_data = mipi_dsi_get_drvdata(dsi);
99
100 mipi_dsi_detach(dsi);
101 drm_panel_remove(&s_data->panel);
102}
103
104static int summit_suspend(struct device *dev)
105{
106 struct summit_data *s_data = dev_get_drvdata(dev);
107
108 return mipi_dsi_dcs_set_display_brightness(s_data->dsi, 0);
109}
110
111static DEFINE_SIMPLE_DEV_PM_OPS(summit_pm_ops, summit_suspend,
112 summit_set_brightness);
113
114static const struct of_device_id summit_of_match[] = {
115 { .compatible = "apple,summit" },
116 {},
117};
118
119MODULE_DEVICE_TABLE(of, summit_of_match);
120
121static struct mipi_dsi_driver summit_driver = {
122 .probe = summit_probe,
123 .remove = summit_remove,
124 .driver = {
125 .name = "panel-summit",
126 .of_match_table = summit_of_match,
127 .pm = pm_sleep_ptr(&summit_pm_ops),
128 },
129};
130module_mipi_dsi_driver(summit_driver);
131
132MODULE_DESCRIPTION("Summit Display Panel Driver");
133MODULE_LICENSE("GPL");