1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * Copyright (C) 2015 Red Hat |
4 | * Copyright (C) 2015 Sony Mobile Communications Inc. |
5 | * Author: Werner Johansson <werner.johansson@sonymobile.com> |
6 | * |
7 | * Based on AUO panel driver by Rob Clark <robdclark@gmail.com> |
8 | */ |
9 | |
10 | #include <linux/delay.h> |
11 | #include <linux/module.h> |
12 | #include <linux/of.h> |
13 | #include <linux/regulator/consumer.h> |
14 | |
15 | #include <video/mipi_display.h> |
16 | |
17 | #include <drm/drm_crtc.h> |
18 | #include <drm/drm_device.h> |
19 | #include <drm/drm_mipi_dsi.h> |
20 | #include <drm/drm_panel.h> |
21 | |
22 | /* |
23 | * When power is turned off to this panel a minimum off time of 500ms has to be |
24 | * observed before powering back on as there's no external reset pin. Keep |
25 | * track of earliest wakeup time and delay subsequent prepare call accordingly |
26 | */ |
27 | #define MIN_POFF_MS (500) |
28 | |
29 | struct wuxga_nt_panel { |
30 | struct drm_panel base; |
31 | struct mipi_dsi_device *dsi; |
32 | |
33 | struct regulator *supply; |
34 | |
35 | bool prepared; |
36 | bool enabled; |
37 | |
38 | ktime_t earliest_wake; |
39 | |
40 | const struct drm_display_mode *mode; |
41 | }; |
42 | |
43 | static inline struct wuxga_nt_panel *to_wuxga_nt_panel(struct drm_panel *panel) |
44 | { |
45 | return container_of(panel, struct wuxga_nt_panel, base); |
46 | } |
47 | |
48 | static int wuxga_nt_panel_on(struct wuxga_nt_panel *wuxga_nt) |
49 | { |
50 | return mipi_dsi_turn_on_peripheral(dsi: wuxga_nt->dsi); |
51 | } |
52 | |
53 | static int wuxga_nt_panel_disable(struct drm_panel *panel) |
54 | { |
55 | struct wuxga_nt_panel *wuxga_nt = to_wuxga_nt_panel(panel); |
56 | int mipi_ret, bl_ret = 0; |
57 | |
58 | if (!wuxga_nt->enabled) |
59 | return 0; |
60 | |
61 | mipi_ret = mipi_dsi_shutdown_peripheral(dsi: wuxga_nt->dsi); |
62 | |
63 | wuxga_nt->enabled = false; |
64 | |
65 | return mipi_ret ? mipi_ret : bl_ret; |
66 | } |
67 | |
68 | static int wuxga_nt_panel_unprepare(struct drm_panel *panel) |
69 | { |
70 | struct wuxga_nt_panel *wuxga_nt = to_wuxga_nt_panel(panel); |
71 | |
72 | if (!wuxga_nt->prepared) |
73 | return 0; |
74 | |
75 | regulator_disable(regulator: wuxga_nt->supply); |
76 | wuxga_nt->earliest_wake = ktime_add_ms(kt: ktime_get_real(), MIN_POFF_MS); |
77 | wuxga_nt->prepared = false; |
78 | |
79 | return 0; |
80 | } |
81 | |
82 | static int wuxga_nt_panel_prepare(struct drm_panel *panel) |
83 | { |
84 | struct wuxga_nt_panel *wuxga_nt = to_wuxga_nt_panel(panel); |
85 | int ret; |
86 | s64 enablewait; |
87 | |
88 | if (wuxga_nt->prepared) |
89 | return 0; |
90 | |
91 | /* |
92 | * If the user re-enabled the panel before the required off-time then |
93 | * we need to wait the remaining period before re-enabling regulator |
94 | */ |
95 | enablewait = ktime_ms_delta(later: wuxga_nt->earliest_wake, earlier: ktime_get_real()); |
96 | |
97 | /* Sanity check, this should never happen */ |
98 | if (enablewait > MIN_POFF_MS) |
99 | enablewait = MIN_POFF_MS; |
100 | |
101 | if (enablewait > 0) |
102 | msleep(msecs: enablewait); |
103 | |
104 | ret = regulator_enable(regulator: wuxga_nt->supply); |
105 | if (ret < 0) |
106 | return ret; |
107 | |
108 | /* |
109 | * A minimum delay of 250ms is required after power-up until commands |
110 | * can be sent |
111 | */ |
112 | msleep(msecs: 250); |
113 | |
114 | ret = wuxga_nt_panel_on(wuxga_nt); |
115 | if (ret < 0) { |
116 | dev_err(panel->dev, "failed to set panel on: %d\n" , ret); |
117 | goto poweroff; |
118 | } |
119 | |
120 | wuxga_nt->prepared = true; |
121 | |
122 | return 0; |
123 | |
124 | poweroff: |
125 | regulator_disable(regulator: wuxga_nt->supply); |
126 | |
127 | return ret; |
128 | } |
129 | |
130 | static int wuxga_nt_panel_enable(struct drm_panel *panel) |
131 | { |
132 | struct wuxga_nt_panel *wuxga_nt = to_wuxga_nt_panel(panel); |
133 | |
134 | if (wuxga_nt->enabled) |
135 | return 0; |
136 | |
137 | wuxga_nt->enabled = true; |
138 | |
139 | return 0; |
140 | } |
141 | |
142 | static const struct drm_display_mode default_mode = { |
143 | .clock = 164402, |
144 | .hdisplay = 1920, |
145 | .hsync_start = 1920 + 152, |
146 | .hsync_end = 1920 + 152 + 52, |
147 | .htotal = 1920 + 152 + 52 + 20, |
148 | .vdisplay = 1200, |
149 | .vsync_start = 1200 + 24, |
150 | .vsync_end = 1200 + 24 + 6, |
151 | .vtotal = 1200 + 24 + 6 + 48, |
152 | }; |
153 | |
154 | static int wuxga_nt_panel_get_modes(struct drm_panel *panel, |
155 | struct drm_connector *connector) |
156 | { |
157 | struct drm_display_mode *mode; |
158 | |
159 | mode = drm_mode_duplicate(dev: connector->dev, mode: &default_mode); |
160 | if (!mode) { |
161 | dev_err(panel->dev, "failed to add mode %ux%u@%u\n" , |
162 | default_mode.hdisplay, default_mode.vdisplay, |
163 | drm_mode_vrefresh(&default_mode)); |
164 | return -ENOMEM; |
165 | } |
166 | |
167 | drm_mode_set_name(mode); |
168 | |
169 | drm_mode_probed_add(connector, mode); |
170 | |
171 | connector->display_info.width_mm = 217; |
172 | connector->display_info.height_mm = 136; |
173 | |
174 | return 1; |
175 | } |
176 | |
177 | static const struct drm_panel_funcs wuxga_nt_panel_funcs = { |
178 | .disable = wuxga_nt_panel_disable, |
179 | .unprepare = wuxga_nt_panel_unprepare, |
180 | .prepare = wuxga_nt_panel_prepare, |
181 | .enable = wuxga_nt_panel_enable, |
182 | .get_modes = wuxga_nt_panel_get_modes, |
183 | }; |
184 | |
185 | static const struct of_device_id wuxga_nt_of_match[] = { |
186 | { .compatible = "panasonic,vvx10f034n00" , }, |
187 | { } |
188 | }; |
189 | MODULE_DEVICE_TABLE(of, wuxga_nt_of_match); |
190 | |
191 | static int wuxga_nt_panel_add(struct wuxga_nt_panel *wuxga_nt) |
192 | { |
193 | struct device *dev = &wuxga_nt->dsi->dev; |
194 | int ret; |
195 | |
196 | wuxga_nt->mode = &default_mode; |
197 | |
198 | wuxga_nt->supply = devm_regulator_get(dev, id: "power" ); |
199 | if (IS_ERR(ptr: wuxga_nt->supply)) |
200 | return PTR_ERR(ptr: wuxga_nt->supply); |
201 | |
202 | drm_panel_init(panel: &wuxga_nt->base, dev: &wuxga_nt->dsi->dev, |
203 | funcs: &wuxga_nt_panel_funcs, DRM_MODE_CONNECTOR_DSI); |
204 | |
205 | ret = drm_panel_of_backlight(panel: &wuxga_nt->base); |
206 | if (ret) |
207 | return ret; |
208 | |
209 | drm_panel_add(panel: &wuxga_nt->base); |
210 | |
211 | return 0; |
212 | } |
213 | |
214 | static void wuxga_nt_panel_del(struct wuxga_nt_panel *wuxga_nt) |
215 | { |
216 | if (wuxga_nt->base.dev) |
217 | drm_panel_remove(panel: &wuxga_nt->base); |
218 | } |
219 | |
220 | static int wuxga_nt_panel_probe(struct mipi_dsi_device *dsi) |
221 | { |
222 | struct wuxga_nt_panel *wuxga_nt; |
223 | int ret; |
224 | |
225 | dsi->lanes = 4; |
226 | dsi->format = MIPI_DSI_FMT_RGB888; |
227 | dsi->mode_flags = MIPI_DSI_MODE_VIDEO | |
228 | MIPI_DSI_MODE_VIDEO_HSE | |
229 | MIPI_DSI_CLOCK_NON_CONTINUOUS | |
230 | MIPI_DSI_MODE_LPM; |
231 | |
232 | wuxga_nt = devm_kzalloc(dev: &dsi->dev, size: sizeof(*wuxga_nt), GFP_KERNEL); |
233 | if (!wuxga_nt) |
234 | return -ENOMEM; |
235 | |
236 | mipi_dsi_set_drvdata(dsi, data: wuxga_nt); |
237 | |
238 | wuxga_nt->dsi = dsi; |
239 | |
240 | ret = wuxga_nt_panel_add(wuxga_nt); |
241 | if (ret < 0) |
242 | return ret; |
243 | |
244 | ret = mipi_dsi_attach(dsi); |
245 | if (ret < 0) { |
246 | wuxga_nt_panel_del(wuxga_nt); |
247 | return ret; |
248 | } |
249 | |
250 | return 0; |
251 | } |
252 | |
253 | static void wuxga_nt_panel_remove(struct mipi_dsi_device *dsi) |
254 | { |
255 | struct wuxga_nt_panel *wuxga_nt = mipi_dsi_get_drvdata(dsi); |
256 | int ret; |
257 | |
258 | ret = drm_panel_disable(panel: &wuxga_nt->base); |
259 | if (ret < 0) |
260 | dev_err(&dsi->dev, "failed to disable panel: %d\n" , ret); |
261 | |
262 | ret = mipi_dsi_detach(dsi); |
263 | if (ret < 0) |
264 | dev_err(&dsi->dev, "failed to detach from DSI host: %d\n" , ret); |
265 | |
266 | wuxga_nt_panel_del(wuxga_nt); |
267 | } |
268 | |
269 | static void wuxga_nt_panel_shutdown(struct mipi_dsi_device *dsi) |
270 | { |
271 | struct wuxga_nt_panel *wuxga_nt = mipi_dsi_get_drvdata(dsi); |
272 | |
273 | drm_panel_disable(panel: &wuxga_nt->base); |
274 | } |
275 | |
276 | static struct mipi_dsi_driver wuxga_nt_panel_driver = { |
277 | .driver = { |
278 | .name = "panel-panasonic-vvx10f034n00" , |
279 | .of_match_table = wuxga_nt_of_match, |
280 | }, |
281 | .probe = wuxga_nt_panel_probe, |
282 | .remove = wuxga_nt_panel_remove, |
283 | .shutdown = wuxga_nt_panel_shutdown, |
284 | }; |
285 | module_mipi_dsi_driver(wuxga_nt_panel_driver); |
286 | |
287 | MODULE_AUTHOR("Werner Johansson <werner.johansson@sonymobile.com>" ); |
288 | MODULE_DESCRIPTION("Panasonic VVX10F034N00 Novatek NT1397-based WUXGA (1920x1200) video mode panel driver" ); |
289 | MODULE_LICENSE("GPL v2" ); |
290 | |