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1/*
2 * Copyright (C) 2015 Red Hat
3 * Copyright (C) 2015 Sony Mobile Communications Inc.
4 * Author: Werner Johansson <werner.johansson@sonymobile.com>
5 *
6 * Based on AUO panel driver by Rob Clark <robdclark@gmail.com>
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License version 2 as published by
10 * the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * more details.
16 *
17 * You should have received a copy of the GNU General Public License along with
18 * this program. If not, see <http://www.gnu.org/licenses/>.
19 */
20
21#include <linux/backlight.h>
22#include <linux/module.h>
23#include <linux/of.h>
24#include <linux/regulator/consumer.h>
25
26#include <drm/drmP.h>
27#include <drm/drm_crtc.h>
28#include <drm/drm_mipi_dsi.h>
29#include <drm/drm_panel.h>
30
31#include <video/mipi_display.h>
32
33/*
34 * When power is turned off to this panel a minimum off time of 500ms has to be
35 * observed before powering back on as there's no external reset pin. Keep
36 * track of earliest wakeup time and delay subsequent prepare call accordingly
37 */
38#define MIN_POFF_MS (500)
39
40struct wuxga_nt_panel {
41 struct drm_panel base;
42 struct mipi_dsi_device *dsi;
43
44 struct backlight_device *backlight;
45 struct regulator *supply;
46
47 bool prepared;
48 bool enabled;
49
50 ktime_t earliest_wake;
51
52 const struct drm_display_mode *mode;
53};
54
55static inline struct wuxga_nt_panel *to_wuxga_nt_panel(struct drm_panel *panel)
56{
57 return container_of(panel, struct wuxga_nt_panel, base);
58}
59
60static int wuxga_nt_panel_on(struct wuxga_nt_panel *wuxga_nt)
61{
62 struct mipi_dsi_device *dsi = wuxga_nt->dsi;
63 int ret;
64
65 ret = mipi_dsi_turn_on_peripheral(dsi);
66 if (ret < 0)
67 return ret;
68
69 return 0;
70}
71
72static int wuxga_nt_panel_disable(struct drm_panel *panel)
73{
74 struct wuxga_nt_panel *wuxga_nt = to_wuxga_nt_panel(panel);
75
76 if (!wuxga_nt->enabled)
77 return 0;
78
79 mipi_dsi_shutdown_peripheral(wuxga_nt->dsi);
80
81 if (wuxga_nt->backlight) {
82 wuxga_nt->backlight->props.power = FB_BLANK_POWERDOWN;
83 wuxga_nt->backlight->props.state |= BL_CORE_FBBLANK;
84 backlight_update_status(wuxga_nt->backlight);
85 }
86
87 wuxga_nt->enabled = false;
88
89 return 0;
90}
91
92static int wuxga_nt_panel_unprepare(struct drm_panel *panel)
93{
94 struct wuxga_nt_panel *wuxga_nt = to_wuxga_nt_panel(panel);
95
96 if (!wuxga_nt->prepared)
97 return 0;
98
99 regulator_disable(wuxga_nt->supply);
100 wuxga_nt->earliest_wake = ktime_add_ms(ktime_get_real(), MIN_POFF_MS);
101 wuxga_nt->prepared = false;
102
103 return 0;
104}
105
106static int wuxga_nt_panel_prepare(struct drm_panel *panel)
107{
108 struct wuxga_nt_panel *wuxga_nt = to_wuxga_nt_panel(panel);
109 int ret;
110 s64 enablewait;
111
112 if (wuxga_nt->prepared)
113 return 0;
114
115 /*
116 * If the user re-enabled the panel before the required off-time then
117 * we need to wait the remaining period before re-enabling regulator
118 */
119 enablewait = ktime_ms_delta(wuxga_nt->earliest_wake, ktime_get_real());
120
121 /* Sanity check, this should never happen */
122 if (enablewait > MIN_POFF_MS)
123 enablewait = MIN_POFF_MS;
124
125 if (enablewait > 0)
126 msleep(enablewait);
127
128 ret = regulator_enable(wuxga_nt->supply);
129 if (ret < 0)
130 return ret;
131
132 /*
133 * A minimum delay of 250ms is required after power-up until commands
134 * can be sent
135 */
136 msleep(250);
137
138 ret = wuxga_nt_panel_on(wuxga_nt);
139 if (ret < 0) {
140 dev_err(panel->dev, "failed to set panel on: %d\n", ret);
141 goto poweroff;
142 }
143
144 wuxga_nt->prepared = true;
145
146 return 0;
147
148poweroff:
149 regulator_disable(wuxga_nt->supply);
150
151 return ret;
152}
153
154static int wuxga_nt_panel_enable(struct drm_panel *panel)
155{
156 struct wuxga_nt_panel *wuxga_nt = to_wuxga_nt_panel(panel);
157
158 if (wuxga_nt->enabled)
159 return 0;
160
161 if (wuxga_nt->backlight) {
162 wuxga_nt->backlight->props.power = FB_BLANK_UNBLANK;
163 wuxga_nt->backlight->props.state &= ~BL_CORE_FBBLANK;
164 backlight_update_status(wuxga_nt->backlight);
165 }
166
167 wuxga_nt->enabled = true;
168
169 return 0;
170}
171
172static const struct drm_display_mode default_mode = {
173 .clock = 164402,
174 .hdisplay = 1920,
175 .hsync_start = 1920 + 152,
176 .hsync_end = 1920 + 152 + 52,
177 .htotal = 1920 + 152 + 52 + 20,
178 .vdisplay = 1200,
179 .vsync_start = 1200 + 24,
180 .vsync_end = 1200 + 24 + 6,
181 .vtotal = 1200 + 24 + 6 + 48,
182 .vrefresh = 60,
183};
184
185static int wuxga_nt_panel_get_modes(struct drm_panel *panel)
186{
187 struct drm_display_mode *mode;
188
189 mode = drm_mode_duplicate(panel->drm, &default_mode);
190 if (!mode) {
191 dev_err(panel->drm->dev, "failed to add mode %ux%ux@%u\n",
192 default_mode.hdisplay, default_mode.vdisplay,
193 default_mode.vrefresh);
194 return -ENOMEM;
195 }
196
197 drm_mode_set_name(mode);
198
199 drm_mode_probed_add(panel->connector, mode);
200
201 panel->connector->display_info.width_mm = 217;
202 panel->connector->display_info.height_mm = 136;
203
204 return 1;
205}
206
207static const struct drm_panel_funcs wuxga_nt_panel_funcs = {
208 .disable = wuxga_nt_panel_disable,
209 .unprepare = wuxga_nt_panel_unprepare,
210 .prepare = wuxga_nt_panel_prepare,
211 .enable = wuxga_nt_panel_enable,
212 .get_modes = wuxga_nt_panel_get_modes,
213};
214
215static const struct of_device_id wuxga_nt_of_match[] = {
216 { .compatible = "panasonic,vvx10f034n00", },
217 { }
218};
219MODULE_DEVICE_TABLE(of, wuxga_nt_of_match);
220
221static int wuxga_nt_panel_add(struct wuxga_nt_panel *wuxga_nt)
222{
223 struct device *dev = &wuxga_nt->dsi->dev;
224 struct device_node *np;
225 int ret;
226
227 wuxga_nt->mode = &default_mode;
228
229 wuxga_nt->supply = devm_regulator_get(dev, "power");
230 if (IS_ERR(wuxga_nt->supply))
231 return PTR_ERR(wuxga_nt->supply);
232
233 np = of_parse_phandle(dev->of_node, "backlight", 0);
234 if (np) {
235 wuxga_nt->backlight = of_find_backlight_by_node(np);
236 of_node_put(np);
237
238 if (!wuxga_nt->backlight)
239 return -EPROBE_DEFER;
240 }
241
242 drm_panel_init(&wuxga_nt->base);
243 wuxga_nt->base.funcs = &wuxga_nt_panel_funcs;
244 wuxga_nt->base.dev = &wuxga_nt->dsi->dev;
245
246 ret = drm_panel_add(&wuxga_nt->base);
247 if (ret < 0)
248 goto put_backlight;
249
250 return 0;
251
252put_backlight:
253 if (wuxga_nt->backlight)
254 put_device(&wuxga_nt->backlight->dev);
255
256 return ret;
257}
258
259static void wuxga_nt_panel_del(struct wuxga_nt_panel *wuxga_nt)
260{
261 if (wuxga_nt->base.dev)
262 drm_panel_remove(&wuxga_nt->base);
263
264 if (wuxga_nt->backlight)
265 put_device(&wuxga_nt->backlight->dev);
266}
267
268static int wuxga_nt_panel_probe(struct mipi_dsi_device *dsi)
269{
270 struct wuxga_nt_panel *wuxga_nt;
271 int ret;
272
273 dsi->lanes = 4;
274 dsi->format = MIPI_DSI_FMT_RGB888;
275 dsi->mode_flags = MIPI_DSI_MODE_VIDEO |
276 MIPI_DSI_MODE_VIDEO_HSE |
277 MIPI_DSI_CLOCK_NON_CONTINUOUS |
278 MIPI_DSI_MODE_LPM;
279
280 wuxga_nt = devm_kzalloc(&dsi->dev, sizeof(*wuxga_nt), GFP_KERNEL);
281 if (!wuxga_nt)
282 return -ENOMEM;
283
284 mipi_dsi_set_drvdata(dsi, wuxga_nt);
285
286 wuxga_nt->dsi = dsi;
287
288 ret = wuxga_nt_panel_add(wuxga_nt);
289 if (ret < 0)
290 return ret;
291
292 return mipi_dsi_attach(dsi);
293}
294
295static int wuxga_nt_panel_remove(struct mipi_dsi_device *dsi)
296{
297 struct wuxga_nt_panel *wuxga_nt = mipi_dsi_get_drvdata(dsi);
298 int ret;
299
300 ret = wuxga_nt_panel_disable(&wuxga_nt->base);
301 if (ret < 0)
302 dev_err(&dsi->dev, "failed to disable panel: %d\n", ret);
303
304 ret = mipi_dsi_detach(dsi);
305 if (ret < 0)
306 dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", ret);
307
308 drm_panel_detach(&wuxga_nt->base);
309 wuxga_nt_panel_del(wuxga_nt);
310
311 return 0;
312}
313
314static void wuxga_nt_panel_shutdown(struct mipi_dsi_device *dsi)
315{
316 struct wuxga_nt_panel *wuxga_nt = mipi_dsi_get_drvdata(dsi);
317
318 wuxga_nt_panel_disable(&wuxga_nt->base);
319}
320
321static struct mipi_dsi_driver wuxga_nt_panel_driver = {
322 .driver = {
323 .name = "panel-panasonic-vvx10f034n00",
324 .of_match_table = wuxga_nt_of_match,
325 },
326 .probe = wuxga_nt_panel_probe,
327 .remove = wuxga_nt_panel_remove,
328 .shutdown = wuxga_nt_panel_shutdown,
329};
330module_mipi_dsi_driver(wuxga_nt_panel_driver);
331
332MODULE_AUTHOR("Werner Johansson <werner.johansson@sonymobile.com>");
333MODULE_DESCRIPTION("Panasonic VVX10F034N00 Novatek NT1397-based WUXGA (1920x1200) video mode panel driver");
334MODULE_LICENSE("GPL v2");
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
29struct wuxga_nt_panel {
30 struct drm_panel base;
31 struct mipi_dsi_device *dsi;
32
33 struct regulator *supply;
34
35 ktime_t earliest_wake;
36
37 const struct drm_display_mode *mode;
38};
39
40static inline struct wuxga_nt_panel *to_wuxga_nt_panel(struct drm_panel *panel)
41{
42 return container_of(panel, struct wuxga_nt_panel, base);
43}
44
45static int wuxga_nt_panel_on(struct wuxga_nt_panel *wuxga_nt)
46{
47 return mipi_dsi_turn_on_peripheral(wuxga_nt->dsi);
48}
49
50static int wuxga_nt_panel_disable(struct drm_panel *panel)
51{
52 struct wuxga_nt_panel *wuxga_nt = to_wuxga_nt_panel(panel);
53
54 return mipi_dsi_shutdown_peripheral(wuxga_nt->dsi);
55}
56
57static int wuxga_nt_panel_unprepare(struct drm_panel *panel)
58{
59 struct wuxga_nt_panel *wuxga_nt = to_wuxga_nt_panel(panel);
60
61 regulator_disable(wuxga_nt->supply);
62 wuxga_nt->earliest_wake = ktime_add_ms(ktime_get_real(), MIN_POFF_MS);
63
64 return 0;
65}
66
67static int wuxga_nt_panel_prepare(struct drm_panel *panel)
68{
69 struct wuxga_nt_panel *wuxga_nt = to_wuxga_nt_panel(panel);
70 int ret;
71 s64 enablewait;
72
73 /*
74 * If the user re-enabled the panel before the required off-time then
75 * we need to wait the remaining period before re-enabling regulator
76 */
77 enablewait = ktime_ms_delta(wuxga_nt->earliest_wake, ktime_get_real());
78
79 /* Sanity check, this should never happen */
80 if (enablewait > MIN_POFF_MS)
81 enablewait = MIN_POFF_MS;
82
83 if (enablewait > 0)
84 msleep(enablewait);
85
86 ret = regulator_enable(wuxga_nt->supply);
87 if (ret < 0)
88 return ret;
89
90 /*
91 * A minimum delay of 250ms is required after power-up until commands
92 * can be sent
93 */
94 msleep(250);
95
96 ret = wuxga_nt_panel_on(wuxga_nt);
97 if (ret < 0) {
98 dev_err(panel->dev, "failed to set panel on: %d\n", ret);
99 goto poweroff;
100 }
101
102 return 0;
103
104poweroff:
105 regulator_disable(wuxga_nt->supply);
106
107 return ret;
108}
109
110static const struct drm_display_mode default_mode = {
111 .clock = 164402,
112 .hdisplay = 1920,
113 .hsync_start = 1920 + 152,
114 .hsync_end = 1920 + 152 + 52,
115 .htotal = 1920 + 152 + 52 + 20,
116 .vdisplay = 1200,
117 .vsync_start = 1200 + 24,
118 .vsync_end = 1200 + 24 + 6,
119 .vtotal = 1200 + 24 + 6 + 48,
120};
121
122static int wuxga_nt_panel_get_modes(struct drm_panel *panel,
123 struct drm_connector *connector)
124{
125 struct drm_display_mode *mode;
126
127 mode = drm_mode_duplicate(connector->dev, &default_mode);
128 if (!mode) {
129 dev_err(panel->dev, "failed to add mode %ux%u@%u\n",
130 default_mode.hdisplay, default_mode.vdisplay,
131 drm_mode_vrefresh(&default_mode));
132 return -ENOMEM;
133 }
134
135 drm_mode_set_name(mode);
136
137 drm_mode_probed_add(connector, mode);
138
139 connector->display_info.width_mm = 217;
140 connector->display_info.height_mm = 136;
141
142 return 1;
143}
144
145static const struct drm_panel_funcs wuxga_nt_panel_funcs = {
146 .disable = wuxga_nt_panel_disable,
147 .unprepare = wuxga_nt_panel_unprepare,
148 .prepare = wuxga_nt_panel_prepare,
149 .get_modes = wuxga_nt_panel_get_modes,
150};
151
152static const struct of_device_id wuxga_nt_of_match[] = {
153 { .compatible = "panasonic,vvx10f034n00", },
154 { }
155};
156MODULE_DEVICE_TABLE(of, wuxga_nt_of_match);
157
158static int wuxga_nt_panel_add(struct wuxga_nt_panel *wuxga_nt)
159{
160 struct device *dev = &wuxga_nt->dsi->dev;
161 int ret;
162
163 wuxga_nt->mode = &default_mode;
164
165 wuxga_nt->supply = devm_regulator_get(dev, "power");
166 if (IS_ERR(wuxga_nt->supply))
167 return PTR_ERR(wuxga_nt->supply);
168
169 drm_panel_init(&wuxga_nt->base, &wuxga_nt->dsi->dev,
170 &wuxga_nt_panel_funcs, DRM_MODE_CONNECTOR_DSI);
171
172 ret = drm_panel_of_backlight(&wuxga_nt->base);
173 if (ret)
174 return ret;
175
176 drm_panel_add(&wuxga_nt->base);
177
178 return 0;
179}
180
181static void wuxga_nt_panel_del(struct wuxga_nt_panel *wuxga_nt)
182{
183 if (wuxga_nt->base.dev)
184 drm_panel_remove(&wuxga_nt->base);
185}
186
187static int wuxga_nt_panel_probe(struct mipi_dsi_device *dsi)
188{
189 struct wuxga_nt_panel *wuxga_nt;
190 int ret;
191
192 dsi->lanes = 4;
193 dsi->format = MIPI_DSI_FMT_RGB888;
194 dsi->mode_flags = MIPI_DSI_MODE_VIDEO |
195 MIPI_DSI_MODE_VIDEO_HSE |
196 MIPI_DSI_CLOCK_NON_CONTINUOUS |
197 MIPI_DSI_MODE_LPM;
198
199 wuxga_nt = devm_kzalloc(&dsi->dev, sizeof(*wuxga_nt), GFP_KERNEL);
200 if (!wuxga_nt)
201 return -ENOMEM;
202
203 mipi_dsi_set_drvdata(dsi, wuxga_nt);
204
205 wuxga_nt->dsi = dsi;
206
207 ret = wuxga_nt_panel_add(wuxga_nt);
208 if (ret < 0)
209 return ret;
210
211 ret = mipi_dsi_attach(dsi);
212 if (ret < 0) {
213 wuxga_nt_panel_del(wuxga_nt);
214 return ret;
215 }
216
217 return 0;
218}
219
220static void wuxga_nt_panel_remove(struct mipi_dsi_device *dsi)
221{
222 struct wuxga_nt_panel *wuxga_nt = mipi_dsi_get_drvdata(dsi);
223 int ret;
224
225 ret = mipi_dsi_detach(dsi);
226 if (ret < 0)
227 dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", ret);
228
229 wuxga_nt_panel_del(wuxga_nt);
230}
231
232static struct mipi_dsi_driver wuxga_nt_panel_driver = {
233 .driver = {
234 .name = "panel-panasonic-vvx10f034n00",
235 .of_match_table = wuxga_nt_of_match,
236 },
237 .probe = wuxga_nt_panel_probe,
238 .remove = wuxga_nt_panel_remove,
239};
240module_mipi_dsi_driver(wuxga_nt_panel_driver);
241
242MODULE_AUTHOR("Werner Johansson <werner.johansson@sonymobile.com>");
243MODULE_DESCRIPTION("Panasonic VVX10F034N00 Novatek NT1397-based WUXGA (1920x1200) video mode panel driver");
244MODULE_LICENSE("GPL v2");