Merge tag 'libnvdimm-for-6.7' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm...
[linux-2.6-microblaze.git] / drivers / gpu / drm / panel / panel-abt-y030xx067a.c
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Asia Better Technology Ltd. Y030XX067A IPS LCD panel driver
4  *
5  * Copyright (C) 2020, Paul Cercueil <paul@crapouillou.net>
6  * Copyright (C) 2020, Christophe Branchereau <cbranchereau@gmail.com>
7  */
8
9 #include <linux/delay.h>
10 #include <linux/device.h>
11 #include <linux/gpio/consumer.h>
12 #include <linux/media-bus-format.h>
13 #include <linux/module.h>
14 #include <linux/of.h>
15 #include <linux/platform_device.h>
16 #include <linux/regmap.h>
17 #include <linux/regulator/consumer.h>
18 #include <linux/spi/spi.h>
19
20 #include <drm/drm_modes.h>
21 #include <drm/drm_panel.h>
22
23 #define REG00_VBRT_CTRL(val)            (val)
24
25 #define REG01_COM_DC(val)               (val)
26
27 #define REG02_DA_CONTRAST(val)          (val)
28 #define REG02_VESA_SEL(val)             ((val) << 5)
29 #define REG02_COMDC_SW                  BIT(7)
30
31 #define REG03_VPOSITION(val)            (val)
32 #define REG03_BSMOUNT                   BIT(5)
33 #define REG03_COMTST                    BIT(6)
34 #define REG03_HPOSITION1                BIT(7)
35
36 #define REG04_HPOSITION1(val)           (val)
37
38 #define REG05_CLIP                      BIT(0)
39 #define REG05_NVM_VREFRESH              BIT(1)
40 #define REG05_SLFR                      BIT(2)
41 #define REG05_SLBRCHARGE(val)           ((val) << 3)
42 #define REG05_PRECHARGE_LEVEL(val)      ((val) << 6)
43
44 #define REG06_TEST5                     BIT(0)
45 #define REG06_SLDWN                     BIT(1)
46 #define REG06_SLRGT                     BIT(2)
47 #define REG06_TEST2                     BIT(3)
48 #define REG06_XPSAVE                    BIT(4)
49 #define REG06_GAMMA_SEL(val)            ((val) << 5)
50 #define REG06_NT                        BIT(7)
51
52 #define REG07_TEST1                     BIT(0)
53 #define REG07_HDVD_POL                  BIT(1)
54 #define REG07_CK_POL                    BIT(2)
55 #define REG07_TEST3                     BIT(3)
56 #define REG07_TEST4                     BIT(4)
57 #define REG07_480_LINEMASK              BIT(5)
58 #define REG07_AMPTST(val)               ((val) << 6)
59
60 #define REG08_SLHRC(val)                (val)
61 #define REG08_CLOCK_DIV(val)            ((val) << 2)
62 #define REG08_PANEL(val)                ((val) << 5)
63
64 #define REG09_SUB_BRIGHT_R(val)         (val)
65 #define REG09_NW_NB                     BIT(6)
66 #define REG09_IPCON                     BIT(7)
67
68 #define REG0A_SUB_BRIGHT_B(val)         (val)
69 #define REG0A_PAIR                      BIT(6)
70 #define REG0A_DE_SEL                    BIT(7)
71
72 #define REG0B_MBK_POSITION(val)         (val)
73 #define REG0B_HD_FREERUN                BIT(4)
74 #define REG0B_VD_FREERUN                BIT(5)
75 #define REG0B_YUV2BIN(val)              ((val) << 6)
76
77 #define REG0C_CONTRAST_R(val)           (val)
78 #define REG0C_DOUBLEREAD                BIT(7)
79
80 #define REG0D_CONTRAST_G(val)           (val)
81 #define REG0D_RGB_YUV                   BIT(7)
82
83 #define REG0E_CONTRAST_B(val)           (val)
84 #define REG0E_PIXELCOLORDRIVE           BIT(7)
85
86 #define REG0F_ASPECT                    BIT(0)
87 #define REG0F_OVERSCAN(val)             ((val) << 1)
88 #define REG0F_FRAMEWIDTH(val)           ((val) << 3)
89
90 #define REG10_BRIGHT(val)               (val)
91
92 #define REG11_SIG_GAIN(val)             (val)
93 #define REG11_SIGC_CNTL                 BIT(6)
94 #define REG11_SIGC_POL                  BIT(7)
95
96 #define REG12_COLOR(val)                (val)
97 #define REG12_PWCKSEL(val)              ((val) << 6)
98
99 #define REG13_4096LEVEL_CNTL(val)       (val)
100 #define REG13_SL4096(val)               ((val) << 4)
101 #define REG13_LIMITER_CONTROL           BIT(7)
102
103 #define REG14_PANEL_TEST(val)           (val)
104
105 #define REG15_NVM_LINK0                 BIT(0)
106 #define REG15_NVM_LINK1                 BIT(1)
107 #define REG15_NVM_LINK2                 BIT(2)
108 #define REG15_NVM_LINK3                 BIT(3)
109 #define REG15_NVM_LINK4                 BIT(4)
110 #define REG15_NVM_LINK5                 BIT(5)
111 #define REG15_NVM_LINK6                 BIT(6)
112 #define REG15_NVM_LINK7                 BIT(7)
113
114 struct y030xx067a_info {
115         const struct drm_display_mode *display_modes;
116         unsigned int num_modes;
117         u16 width_mm, height_mm;
118         u32 bus_format, bus_flags;
119 };
120
121 struct y030xx067a {
122         struct drm_panel panel;
123         struct spi_device *spi;
124         struct regmap *map;
125
126         const struct y030xx067a_info *panel_info;
127
128         struct regulator *supply;
129         struct gpio_desc *reset_gpio;
130 };
131
132 static inline struct y030xx067a *to_y030xx067a(struct drm_panel *panel)
133 {
134         return container_of(panel, struct y030xx067a, panel);
135 }
136
137 static const struct reg_sequence y030xx067a_init_sequence[] = {
138         { 0x00, REG00_VBRT_CTRL(0x7f) },
139         { 0x01, REG01_COM_DC(0x3c) },
140         { 0x02, REG02_VESA_SEL(0x3) | REG02_DA_CONTRAST(0x1f) },
141         { 0x03, REG03_VPOSITION(0x0a) },
142         { 0x04, REG04_HPOSITION1(0xd2) },
143         { 0x05, REG05_CLIP | REG05_NVM_VREFRESH | REG05_SLBRCHARGE(0x2) },
144         { 0x06, REG06_NT },
145         { 0x07, 0 },
146         { 0x08, REG08_PANEL(0x1) | REG08_CLOCK_DIV(0x2) },
147         { 0x09, REG09_SUB_BRIGHT_R(0x20) },
148         { 0x0a, REG0A_SUB_BRIGHT_B(0x20) },
149         { 0x0b, REG0B_HD_FREERUN | REG0B_VD_FREERUN },
150         { 0x0c, REG0C_CONTRAST_R(0x00) },
151         { 0x0d, REG0D_CONTRAST_G(0x00) },
152         { 0x0e, REG0E_CONTRAST_B(0x10) },
153         { 0x0f, 0 },
154         { 0x10, REG10_BRIGHT(0x7f) },
155         { 0x11, REG11_SIGC_CNTL | REG11_SIG_GAIN(0x3f) },
156         { 0x12, REG12_COLOR(0x20) | REG12_PWCKSEL(0x1) },
157         { 0x13, REG13_4096LEVEL_CNTL(0x8) },
158         { 0x14, 0 },
159         { 0x15, 0 },
160 };
161
162 static int y030xx067a_prepare(struct drm_panel *panel)
163 {
164         struct y030xx067a *priv = to_y030xx067a(panel);
165         struct device *dev = &priv->spi->dev;
166         int err;
167
168         err = regulator_enable(priv->supply);
169         if (err) {
170                 dev_err(dev, "Failed to enable power supply: %d\n", err);
171                 return err;
172         }
173
174         /* Reset the chip */
175         gpiod_set_value_cansleep(priv->reset_gpio, 1);
176         usleep_range(1000, 20000);
177         gpiod_set_value_cansleep(priv->reset_gpio, 0);
178         usleep_range(1000, 20000);
179
180         err = regmap_multi_reg_write(priv->map, y030xx067a_init_sequence,
181                                      ARRAY_SIZE(y030xx067a_init_sequence));
182         if (err) {
183                 dev_err(dev, "Failed to init registers: %d\n", err);
184                 goto err_disable_regulator;
185         }
186
187         return 0;
188
189 err_disable_regulator:
190         regulator_disable(priv->supply);
191         return err;
192 }
193
194 static int y030xx067a_unprepare(struct drm_panel *panel)
195 {
196         struct y030xx067a *priv = to_y030xx067a(panel);
197
198         gpiod_set_value_cansleep(priv->reset_gpio, 1);
199         regulator_disable(priv->supply);
200
201         return 0;
202 }
203
204 static int y030xx067a_enable(struct drm_panel *panel)
205 {
206         struct y030xx067a *priv = to_y030xx067a(panel);
207
208         regmap_set_bits(priv->map, 0x06, REG06_XPSAVE);
209
210         if (panel->backlight) {
211                 /* Wait for the picture to be ready before enabling backlight */
212                 msleep(120);
213         }
214
215         return 0;
216 }
217
218 static int y030xx067a_disable(struct drm_panel *panel)
219 {
220         struct y030xx067a *priv = to_y030xx067a(panel);
221
222         regmap_clear_bits(priv->map, 0x06, REG06_XPSAVE);
223
224         return 0;
225 }
226
227 static int y030xx067a_get_modes(struct drm_panel *panel,
228                                 struct drm_connector *connector)
229 {
230         struct y030xx067a *priv = to_y030xx067a(panel);
231         const struct y030xx067a_info *panel_info = priv->panel_info;
232         struct drm_display_mode *mode;
233         unsigned int i;
234
235         for (i = 0; i < panel_info->num_modes; i++) {
236                 mode = drm_mode_duplicate(connector->dev,
237                                           &panel_info->display_modes[i]);
238                 if (!mode)
239                         return -ENOMEM;
240
241                 drm_mode_set_name(mode);
242
243                 mode->type = DRM_MODE_TYPE_DRIVER;
244                 if (panel_info->num_modes == 1)
245                         mode->type |= DRM_MODE_TYPE_PREFERRED;
246
247                 drm_mode_probed_add(connector, mode);
248         }
249
250         connector->display_info.bpc = 8;
251         connector->display_info.width_mm = panel_info->width_mm;
252         connector->display_info.height_mm = panel_info->height_mm;
253
254         drm_display_info_set_bus_formats(&connector->display_info,
255                                          &panel_info->bus_format, 1);
256         connector->display_info.bus_flags = panel_info->bus_flags;
257
258         return panel_info->num_modes;
259 }
260
261 static const struct drm_panel_funcs y030xx067a_funcs = {
262         .prepare        = y030xx067a_prepare,
263         .unprepare      = y030xx067a_unprepare,
264         .enable         = y030xx067a_enable,
265         .disable        = y030xx067a_disable,
266         .get_modes      = y030xx067a_get_modes,
267 };
268
269 static const struct regmap_config y030xx067a_regmap_config = {
270         .reg_bits = 8,
271         .val_bits = 8,
272         .max_register = 0x15,
273         .cache_type = REGCACHE_FLAT,
274 };
275
276 static int y030xx067a_probe(struct spi_device *spi)
277 {
278         struct device *dev = &spi->dev;
279         struct y030xx067a *priv;
280         int err;
281
282         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
283         if (!priv)
284                 return -ENOMEM;
285
286         priv->spi = spi;
287         spi_set_drvdata(spi, priv);
288
289         priv->map = devm_regmap_init_spi(spi, &y030xx067a_regmap_config);
290         if (IS_ERR(priv->map)) {
291                 dev_err(dev, "Unable to init regmap\n");
292                 return PTR_ERR(priv->map);
293         }
294
295         priv->panel_info = of_device_get_match_data(dev);
296         if (!priv->panel_info)
297                 return -EINVAL;
298
299         priv->supply = devm_regulator_get(dev, "power");
300         if (IS_ERR(priv->supply))
301                 return dev_err_probe(dev, PTR_ERR(priv->supply),
302                                      "Failed to get power supply\n");
303
304         priv->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
305         if (IS_ERR(priv->reset_gpio))
306                 return dev_err_probe(dev, PTR_ERR(priv->reset_gpio),
307                                      "Failed to get reset GPIO\n");
308
309         drm_panel_init(&priv->panel, dev, &y030xx067a_funcs,
310                        DRM_MODE_CONNECTOR_DPI);
311
312         err = drm_panel_of_backlight(&priv->panel);
313         if (err)
314                 return err;
315
316         drm_panel_add(&priv->panel);
317
318         return 0;
319 }
320
321 static void y030xx067a_remove(struct spi_device *spi)
322 {
323         struct y030xx067a *priv = spi_get_drvdata(spi);
324
325         drm_panel_remove(&priv->panel);
326         drm_panel_disable(&priv->panel);
327         drm_panel_unprepare(&priv->panel);
328 }
329
330 static const struct drm_display_mode y030xx067a_modes[] = {
331         { /* 60 Hz */
332                 .clock = 14400,
333                 .hdisplay = 320,
334                 .hsync_start = 320 + 10,
335                 .hsync_end = 320 + 10 + 37,
336                 .htotal = 320 + 10 + 37 + 33,
337                 .vdisplay = 480,
338                 .vsync_start = 480 + 84,
339                 .vsync_end = 480 + 84 + 20,
340                 .vtotal = 480 + 84 + 20 + 16,
341                 .flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
342         },
343         { /* 50 Hz */
344                 .clock = 12000,
345                 .hdisplay = 320,
346                 .hsync_start = 320 + 10,
347                 .hsync_end = 320 + 10 + 37,
348                 .htotal = 320 + 10 + 37 + 33,
349                 .vdisplay = 480,
350                 .vsync_start = 480 + 84,
351                 .vsync_end = 480 + 84 + 20,
352                 .vtotal = 480 + 84 + 20 + 16,
353                 .flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
354         },
355 };
356
357 static const struct y030xx067a_info y030xx067a_info = {
358         .display_modes = y030xx067a_modes,
359         .num_modes = ARRAY_SIZE(y030xx067a_modes),
360         .width_mm = 69,
361         .height_mm = 51,
362         .bus_format = MEDIA_BUS_FMT_RGB888_3X8_DELTA,
363         .bus_flags = DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE | DRM_BUS_FLAG_DE_LOW,
364 };
365
366 static const struct of_device_id y030xx067a_of_match[] = {
367         { .compatible = "abt,y030xx067a", .data = &y030xx067a_info },
368         { /* sentinel */ }
369 };
370 MODULE_DEVICE_TABLE(of, y030xx067a_of_match);
371
372 static struct spi_driver y030xx067a_driver = {
373         .driver = {
374                 .name = "abt-y030xx067a",
375                 .of_match_table = y030xx067a_of_match,
376         },
377         .probe = y030xx067a_probe,
378         .remove = y030xx067a_remove,
379 };
380 module_spi_driver(y030xx067a_driver);
381
382 MODULE_AUTHOR("Paul Cercueil <paul@crapouillou.net>");
383 MODULE_AUTHOR("Christophe Branchereau <cbranchereau@gmail.com>");
384 MODULE_LICENSE("GPL v2");