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 
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 
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 
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 
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 
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 
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 
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 
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 
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 
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