1 // SPDX-License-Identifier: GPL-2.0-only
2
3 #include <linux/array_size.h>
4 #include <linux/delay.h>
5 #include <linux/err.h>
6 #include <linux/gpio/consumer.h>
7 #include <linux/module.h>
8 #include <linux/property.h>
9 #include <linux/regulator/consumer.h>
10
11 #include <video/mipi_display.h>
12
13 #include <drm/drm_mipi_dsi.h>
14 #include <drm/drm_modes.h>
15 #include <drm/drm_panel.h>
16
17 struct hv101hd1 {
18 struct drm_panel panel;
19 struct mipi_dsi_device *dsi;
20 struct regulator_bulk_data *supplies;
21 };
22
23 static const struct regulator_bulk_data hv101hd1_supplies[] = {
24 { .supply = "vdd" },
25 { .supply = "vio" },
26 };
27
to_hv101hd1(struct drm_panel * panel)28 static inline struct hv101hd1 *to_hv101hd1(struct drm_panel *panel)
29 {
30 return container_of(panel, struct hv101hd1, panel);
31 }
32
hv101hd1_prepare(struct drm_panel * panel)33 static int hv101hd1_prepare(struct drm_panel *panel)
34 {
35 struct hv101hd1 *hv = to_hv101hd1(panel);
36 struct mipi_dsi_multi_context ctx = { .dsi = hv->dsi };
37 struct device *dev = &hv->dsi->dev;
38 int ret;
39
40 ret = regulator_bulk_enable(ARRAY_SIZE(hv101hd1_supplies), hv->supplies);
41 if (ret) {
42 dev_err(dev, "error enabling regulators (%d)\n", ret);
43 return ret;
44 }
45
46 mipi_dsi_dcs_exit_sleep_mode_multi(&ctx);
47 mipi_dsi_msleep(&ctx, 20);
48
49 mipi_dsi_dcs_set_display_on_multi(&ctx);
50 mipi_dsi_msleep(&ctx, 20);
51
52 return 0;
53 }
54
hv101hd1_disable(struct drm_panel * panel)55 static int hv101hd1_disable(struct drm_panel *panel)
56 {
57 struct hv101hd1 *hv = to_hv101hd1(panel);
58 struct mipi_dsi_multi_context ctx = { .dsi = hv->dsi };
59
60 mipi_dsi_dcs_set_display_off_multi(&ctx);
61 mipi_dsi_msleep(&ctx, 120);
62 mipi_dsi_dcs_enter_sleep_mode_multi(&ctx);
63 mipi_dsi_msleep(&ctx, 20);
64
65 return 0;
66 }
67
hv101hd1_unprepare(struct drm_panel * panel)68 static int hv101hd1_unprepare(struct drm_panel *panel)
69 {
70 struct hv101hd1 *hv = to_hv101hd1(panel);
71
72 return regulator_bulk_disable(ARRAY_SIZE(hv101hd1_supplies),
73 hv->supplies);
74 }
75
76 static const struct drm_display_mode hv101hd1_mode = {
77 .clock = (1366 + 74 + 36 + 24) * (768 + 21 + 7 + 4) * 60 / 1000,
78 .hdisplay = 1366,
79 .hsync_start = 1366 + 74,
80 .hsync_end = 1366 + 74 + 36,
81 .htotal = 1366 + 74 + 36 + 24,
82 .vdisplay = 768,
83 .vsync_start = 768 + 21,
84 .vsync_end = 768 + 21 + 7,
85 .vtotal = 768 + 21 + 7 + 4,
86 .width_mm = 140,
87 .height_mm = 220,
88 };
89
hv101hd1_get_modes(struct drm_panel * panel,struct drm_connector * connector)90 static int hv101hd1_get_modes(struct drm_panel *panel, struct drm_connector *connector)
91 {
92 struct drm_display_mode *mode;
93
94 mode = drm_mode_duplicate(connector->dev, &hv101hd1_mode);
95 if (!mode)
96 return -ENOMEM;
97
98 drm_mode_set_name(mode);
99
100 mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
101
102 connector->display_info.width_mm = mode->width_mm;
103 connector->display_info.height_mm = mode->height_mm;
104
105 drm_mode_probed_add(connector, mode);
106
107 return 1;
108 }
109
110 static const struct drm_panel_funcs hv101hd1_panel_funcs = {
111 .prepare = hv101hd1_prepare,
112 .disable = hv101hd1_disable,
113 .unprepare = hv101hd1_unprepare,
114 .get_modes = hv101hd1_get_modes,
115 };
116
hv101hd1_probe(struct mipi_dsi_device * dsi)117 static int hv101hd1_probe(struct mipi_dsi_device *dsi)
118 {
119 struct device *dev = &dsi->dev;
120 struct hv101hd1 *hv;
121 int ret;
122
123 hv = devm_drm_panel_alloc(dev, struct hv101hd1, panel,
124 &hv101hd1_panel_funcs,
125 DRM_MODE_CONNECTOR_DSI);
126 if (IS_ERR(hv))
127 return PTR_ERR(hv);
128
129 ret = devm_regulator_bulk_get_const(dev, ARRAY_SIZE(hv101hd1_supplies),
130 hv101hd1_supplies, &hv->supplies);
131 if (ret)
132 return dev_err_probe(dev, ret, "failed to get regulators\n");
133
134 hv->dsi = dsi;
135 mipi_dsi_set_drvdata(dsi, hv);
136
137 dsi->lanes = 2;
138 dsi->format = MIPI_DSI_FMT_RGB888;
139 dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_LPM;
140
141 ret = drm_panel_of_backlight(&hv->panel);
142 if (ret)
143 return dev_err_probe(dev, ret, "Failed to get backlight\n");
144
145 drm_panel_add(&hv->panel);
146
147 ret = mipi_dsi_attach(dsi);
148 if (ret) {
149 drm_panel_remove(&hv->panel);
150 return dev_err_probe(dev, ret, "Failed to attach to DSI host\n");
151 }
152
153 return 0;
154 }
155
hv101hd1_remove(struct mipi_dsi_device * dsi)156 static void hv101hd1_remove(struct mipi_dsi_device *dsi)
157 {
158 struct hv101hd1 *hv = mipi_dsi_get_drvdata(dsi);
159 int ret;
160
161 ret = mipi_dsi_detach(dsi);
162 if (ret < 0)
163 dev_err(&dsi->dev,
164 "Failed to detach from DSI host: %d\n", ret);
165
166 drm_panel_remove(&hv->panel);
167 }
168
169 static const struct of_device_id hv101hd1_of_match[] = {
170 { .compatible = "hydis,hv101hd1" },
171 { /* sentinel */ }
172 };
173 MODULE_DEVICE_TABLE(of, hv101hd1_of_match);
174
175 static struct mipi_dsi_driver hv101hd1_driver = {
176 .driver = {
177 .name = "panel-hv101hd1",
178 .of_match_table = hv101hd1_of_match,
179 },
180 .probe = hv101hd1_probe,
181 .remove = hv101hd1_remove,
182 };
183 module_mipi_dsi_driver(hv101hd1_driver);
184
185 MODULE_AUTHOR("Svyatoslav Ryhel <clamor95@gmail.com>");
186 MODULE_DESCRIPTION("DRM driver for Hydis HV101HD1 panel");
187 MODULE_LICENSE("GPL");
188