1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (C) 2019 Texas Instruments Incorporated - https://www.ti.com
4 * Author: Peter Ujfalusi <peter.ujfalusi@ti.com>
5 */
6
7 #include <linux/module.h>
8 #include <linux/of.h>
9 #include <linux/regulator/consumer.h>
10
11 #include <drm/drm_crtc.h>
12 #include <drm/drm_device.h>
13 #include <drm/drm_mipi_dsi.h>
14 #include <drm/drm_panel.h>
15
16 #include <video/mipi_display.h>
17
18 struct osd101t2587_panel {
19 struct drm_panel base;
20 struct mipi_dsi_device *dsi;
21
22 struct regulator *supply;
23
24 bool prepared;
25 bool enabled;
26
27 const struct drm_display_mode *default_mode;
28 };
29
ti_osd_panel(struct drm_panel * panel)30 static inline struct osd101t2587_panel *ti_osd_panel(struct drm_panel *panel)
31 {
32 return container_of(panel, struct osd101t2587_panel, base);
33 }
34
osd101t2587_panel_disable(struct drm_panel * panel)35 static int osd101t2587_panel_disable(struct drm_panel *panel)
36 {
37 struct osd101t2587_panel *osd101t2587 = ti_osd_panel(panel);
38 int ret;
39
40 if (!osd101t2587->enabled)
41 return 0;
42
43 ret = mipi_dsi_shutdown_peripheral(osd101t2587->dsi);
44
45 osd101t2587->enabled = false;
46
47 return ret;
48 }
49
osd101t2587_panel_unprepare(struct drm_panel * panel)50 static int osd101t2587_panel_unprepare(struct drm_panel *panel)
51 {
52 struct osd101t2587_panel *osd101t2587 = ti_osd_panel(panel);
53
54 if (!osd101t2587->prepared)
55 return 0;
56
57 regulator_disable(osd101t2587->supply);
58 osd101t2587->prepared = false;
59
60 return 0;
61 }
62
osd101t2587_panel_prepare(struct drm_panel * panel)63 static int osd101t2587_panel_prepare(struct drm_panel *panel)
64 {
65 struct osd101t2587_panel *osd101t2587 = ti_osd_panel(panel);
66 int ret;
67
68 if (osd101t2587->prepared)
69 return 0;
70
71 ret = regulator_enable(osd101t2587->supply);
72 if (!ret)
73 osd101t2587->prepared = true;
74
75 return ret;
76 }
77
osd101t2587_panel_enable(struct drm_panel * panel)78 static int osd101t2587_panel_enable(struct drm_panel *panel)
79 {
80 struct osd101t2587_panel *osd101t2587 = ti_osd_panel(panel);
81 int ret;
82
83 if (osd101t2587->enabled)
84 return 0;
85
86 ret = mipi_dsi_turn_on_peripheral(osd101t2587->dsi);
87 if (ret)
88 return ret;
89
90 osd101t2587->enabled = true;
91
92 return ret;
93 }
94
95 static const struct drm_display_mode default_mode_osd101t2587 = {
96 .clock = 164400,
97 .hdisplay = 1920,
98 .hsync_start = 1920 + 152,
99 .hsync_end = 1920 + 152 + 52,
100 .htotal = 1920 + 152 + 52 + 20,
101 .vdisplay = 1200,
102 .vsync_start = 1200 + 24,
103 .vsync_end = 1200 + 24 + 6,
104 .vtotal = 1200 + 24 + 6 + 48,
105 .flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
106 };
107
osd101t2587_panel_get_modes(struct drm_panel * panel,struct drm_connector * connector)108 static int osd101t2587_panel_get_modes(struct drm_panel *panel,
109 struct drm_connector *connector)
110 {
111 struct osd101t2587_panel *osd101t2587 = ti_osd_panel(panel);
112 struct drm_display_mode *mode;
113
114 mode = drm_mode_duplicate(connector->dev, osd101t2587->default_mode);
115 if (!mode) {
116 dev_err(panel->dev, "failed to add mode %ux%ux@%u\n",
117 osd101t2587->default_mode->hdisplay,
118 osd101t2587->default_mode->vdisplay,
119 drm_mode_vrefresh(osd101t2587->default_mode));
120 return -ENOMEM;
121 }
122
123 drm_mode_set_name(mode);
124
125 drm_mode_probed_add(connector, mode);
126
127 connector->display_info.width_mm = 217;
128 connector->display_info.height_mm = 136;
129
130 return 1;
131 }
132
133 static const struct drm_panel_funcs osd101t2587_panel_funcs = {
134 .disable = osd101t2587_panel_disable,
135 .unprepare = osd101t2587_panel_unprepare,
136 .prepare = osd101t2587_panel_prepare,
137 .enable = osd101t2587_panel_enable,
138 .get_modes = osd101t2587_panel_get_modes,
139 };
140
141 static const struct of_device_id osd101t2587_of_match[] = {
142 {
143 .compatible = "osddisplays,osd101t2587-53ts",
144 .data = &default_mode_osd101t2587,
145 }, {
146 /* sentinel */
147 }
148 };
149 MODULE_DEVICE_TABLE(of, osd101t2587_of_match);
150
osd101t2587_panel_add(struct osd101t2587_panel * osd101t2587)151 static int osd101t2587_panel_add(struct osd101t2587_panel *osd101t2587)
152 {
153 struct device *dev = &osd101t2587->dsi->dev;
154 int ret;
155
156 osd101t2587->supply = devm_regulator_get(dev, "power");
157 if (IS_ERR(osd101t2587->supply))
158 return PTR_ERR(osd101t2587->supply);
159
160 drm_panel_init(&osd101t2587->base, &osd101t2587->dsi->dev,
161 &osd101t2587_panel_funcs, DRM_MODE_CONNECTOR_DSI);
162
163 ret = drm_panel_of_backlight(&osd101t2587->base);
164 if (ret)
165 return ret;
166
167 drm_panel_add(&osd101t2587->base);
168
169 return 0;
170 }
171
osd101t2587_panel_probe(struct mipi_dsi_device * dsi)172 static int osd101t2587_panel_probe(struct mipi_dsi_device *dsi)
173 {
174 struct osd101t2587_panel *osd101t2587;
175 const struct of_device_id *id;
176 int ret;
177
178 id = of_match_node(osd101t2587_of_match, dsi->dev.of_node);
179 if (!id)
180 return -ENODEV;
181
182 dsi->lanes = 4;
183 dsi->format = MIPI_DSI_FMT_RGB888;
184 dsi->mode_flags = MIPI_DSI_MODE_VIDEO |
185 MIPI_DSI_MODE_VIDEO_BURST |
186 MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
187 MIPI_DSI_MODE_NO_EOT_PACKET;
188
189 osd101t2587 = devm_kzalloc(&dsi->dev, sizeof(*osd101t2587), GFP_KERNEL);
190 if (!osd101t2587)
191 return -ENOMEM;
192
193 mipi_dsi_set_drvdata(dsi, osd101t2587);
194
195 osd101t2587->dsi = dsi;
196 osd101t2587->default_mode = id->data;
197
198 ret = osd101t2587_panel_add(osd101t2587);
199 if (ret < 0)
200 return ret;
201
202 ret = mipi_dsi_attach(dsi);
203 if (ret)
204 drm_panel_remove(&osd101t2587->base);
205
206 return ret;
207 }
208
osd101t2587_panel_remove(struct mipi_dsi_device * dsi)209 static void osd101t2587_panel_remove(struct mipi_dsi_device *dsi)
210 {
211 struct osd101t2587_panel *osd101t2587 = mipi_dsi_get_drvdata(dsi);
212 int ret;
213
214 ret = drm_panel_disable(&osd101t2587->base);
215 if (ret < 0)
216 dev_warn(&dsi->dev, "failed to disable panel: %d\n", ret);
217
218 drm_panel_unprepare(&osd101t2587->base);
219 drm_panel_remove(&osd101t2587->base);
220
221 ret = mipi_dsi_detach(dsi);
222 if (ret < 0)
223 dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", ret);
224 }
225
osd101t2587_panel_shutdown(struct mipi_dsi_device * dsi)226 static void osd101t2587_panel_shutdown(struct mipi_dsi_device *dsi)
227 {
228 struct osd101t2587_panel *osd101t2587 = mipi_dsi_get_drvdata(dsi);
229
230 drm_panel_disable(&osd101t2587->base);
231 drm_panel_unprepare(&osd101t2587->base);
232 }
233
234 static struct mipi_dsi_driver osd101t2587_panel_driver = {
235 .driver = {
236 .name = "panel-osd-osd101t2587-53ts",
237 .of_match_table = osd101t2587_of_match,
238 },
239 .probe = osd101t2587_panel_probe,
240 .remove = osd101t2587_panel_remove,
241 .shutdown = osd101t2587_panel_shutdown,
242 };
243 module_mipi_dsi_driver(osd101t2587_panel_driver);
244
245 MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>");
246 MODULE_DESCRIPTION("OSD101T2587-53TS DSI panel");
247 MODULE_LICENSE("GPL v2");
248