panel-leadtek-ltk500hd1829.c 11 KB

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  1. // SPDX-License-Identifier: GPL-2.0+
  2. /*
  3. * Copyright (c) 2019 Theobroma Systems Design und Consulting GmbH
  4. *
  5. * base on panel-kingdisplay-kd097d04.c
  6. * Copyright (c) 2017, Fuzhou Rockchip Electronics Co., Ltd
  7. */
  8. #include <linux/backlight.h>
  9. #include <linux/delay.h>
  10. #include <linux/gpio/consumer.h>
  11. #include <linux/module.h>
  12. #include <linux/of.h>
  13. #include <linux/regulator/consumer.h>
  14. #include <video/mipi_display.h>
  15. #include <drm/drm_crtc.h>
  16. #include <drm/drm_device.h>
  17. #include <drm/drm_mipi_dsi.h>
  18. #include <drm/drm_modes.h>
  19. #include <drm/drm_panel.h>
  20. struct ltk500hd1829 {
  21. struct device *dev;
  22. struct drm_panel panel;
  23. struct gpio_desc *reset_gpio;
  24. struct regulator *vcc;
  25. struct regulator *iovcc;
  26. bool prepared;
  27. };
  28. struct ltk500hd1829_cmd {
  29. char cmd;
  30. char data;
  31. };
  32. /*
  33. * There is no description in the Reference Manual about these commands.
  34. * We received them from the vendor, so just use them as is.
  35. */
  36. static const struct ltk500hd1829_cmd init_code[] = {
  37. { 0xE0, 0x00 },
  38. { 0xE1, 0x93 },
  39. { 0xE2, 0x65 },
  40. { 0xE3, 0xF8 },
  41. { 0x80, 0x03 },
  42. { 0xE0, 0x04 },
  43. { 0x2D, 0x03 },
  44. { 0xE0, 0x01 },
  45. { 0x00, 0x00 },
  46. { 0x01, 0xB6 },
  47. { 0x03, 0x00 },
  48. { 0x04, 0xC5 },
  49. { 0x17, 0x00 },
  50. { 0x18, 0xBF },
  51. { 0x19, 0x01 },
  52. { 0x1A, 0x00 },
  53. { 0x1B, 0xBF },
  54. { 0x1C, 0x01 },
  55. { 0x1F, 0x7C },
  56. { 0x20, 0x26 },
  57. { 0x21, 0x26 },
  58. { 0x22, 0x4E },
  59. { 0x37, 0x09 },
  60. { 0x38, 0x04 },
  61. { 0x39, 0x08 },
  62. { 0x3A, 0x1F },
  63. { 0x3B, 0x1F },
  64. { 0x3C, 0x78 },
  65. { 0x3D, 0xFF },
  66. { 0x3E, 0xFF },
  67. { 0x3F, 0x00 },
  68. { 0x40, 0x04 },
  69. { 0x41, 0xA0 },
  70. { 0x43, 0x0F },
  71. { 0x44, 0x0A },
  72. { 0x45, 0x24 },
  73. { 0x55, 0x01 },
  74. { 0x56, 0x01 },
  75. { 0x57, 0xA5 },
  76. { 0x58, 0x0A },
  77. { 0x59, 0x4A },
  78. { 0x5A, 0x38 },
  79. { 0x5B, 0x10 },
  80. { 0x5C, 0x19 },
  81. { 0x5D, 0x7C },
  82. { 0x5E, 0x64 },
  83. { 0x5F, 0x54 },
  84. { 0x60, 0x48 },
  85. { 0x61, 0x44 },
  86. { 0x62, 0x35 },
  87. { 0x63, 0x3A },
  88. { 0x64, 0x24 },
  89. { 0x65, 0x3B },
  90. { 0x66, 0x39 },
  91. { 0x67, 0x37 },
  92. { 0x68, 0x56 },
  93. { 0x69, 0x41 },
  94. { 0x6A, 0x47 },
  95. { 0x6B, 0x2F },
  96. { 0x6C, 0x23 },
  97. { 0x6D, 0x13 },
  98. { 0x6E, 0x02 },
  99. { 0x6F, 0x08 },
  100. { 0x70, 0x7C },
  101. { 0x71, 0x64 },
  102. { 0x72, 0x54 },
  103. { 0x73, 0x48 },
  104. { 0x74, 0x44 },
  105. { 0x75, 0x35 },
  106. { 0x76, 0x3A },
  107. { 0x77, 0x22 },
  108. { 0x78, 0x3B },
  109. { 0x79, 0x39 },
  110. { 0x7A, 0x38 },
  111. { 0x7B, 0x52 },
  112. { 0x7C, 0x41 },
  113. { 0x7D, 0x47 },
  114. { 0x7E, 0x2F },
  115. { 0x7F, 0x23 },
  116. { 0x80, 0x13 },
  117. { 0x81, 0x02 },
  118. { 0x82, 0x08 },
  119. { 0xE0, 0x02 },
  120. { 0x00, 0x57 },
  121. { 0x01, 0x77 },
  122. { 0x02, 0x44 },
  123. { 0x03, 0x46 },
  124. { 0x04, 0x48 },
  125. { 0x05, 0x4A },
  126. { 0x06, 0x4C },
  127. { 0x07, 0x4E },
  128. { 0x08, 0x50 },
  129. { 0x09, 0x55 },
  130. { 0x0A, 0x52 },
  131. { 0x0B, 0x55 },
  132. { 0x0C, 0x55 },
  133. { 0x0D, 0x55 },
  134. { 0x0E, 0x55 },
  135. { 0x0F, 0x55 },
  136. { 0x10, 0x55 },
  137. { 0x11, 0x55 },
  138. { 0x12, 0x55 },
  139. { 0x13, 0x40 },
  140. { 0x14, 0x55 },
  141. { 0x15, 0x55 },
  142. { 0x16, 0x57 },
  143. { 0x17, 0x77 },
  144. { 0x18, 0x45 },
  145. { 0x19, 0x47 },
  146. { 0x1A, 0x49 },
  147. { 0x1B, 0x4B },
  148. { 0x1C, 0x4D },
  149. { 0x1D, 0x4F },
  150. { 0x1E, 0x51 },
  151. { 0x1F, 0x55 },
  152. { 0x20, 0x53 },
  153. { 0x21, 0x55 },
  154. { 0x22, 0x55 },
  155. { 0x23, 0x55 },
  156. { 0x24, 0x55 },
  157. { 0x25, 0x55 },
  158. { 0x26, 0x55 },
  159. { 0x27, 0x55 },
  160. { 0x28, 0x55 },
  161. { 0x29, 0x41 },
  162. { 0x2A, 0x55 },
  163. { 0x2B, 0x55 },
  164. { 0x2C, 0x57 },
  165. { 0x2D, 0x77 },
  166. { 0x2E, 0x4F },
  167. { 0x2F, 0x4D },
  168. { 0x30, 0x4B },
  169. { 0x31, 0x49 },
  170. { 0x32, 0x47 },
  171. { 0x33, 0x45 },
  172. { 0x34, 0x41 },
  173. { 0x35, 0x55 },
  174. { 0x36, 0x53 },
  175. { 0x37, 0x55 },
  176. { 0x38, 0x55 },
  177. { 0x39, 0x55 },
  178. { 0x3A, 0x55 },
  179. { 0x3B, 0x55 },
  180. { 0x3C, 0x55 },
  181. { 0x3D, 0x55 },
  182. { 0x3E, 0x55 },
  183. { 0x3F, 0x51 },
  184. { 0x40, 0x55 },
  185. { 0x41, 0x55 },
  186. { 0x42, 0x57 },
  187. { 0x43, 0x77 },
  188. { 0x44, 0x4E },
  189. { 0x45, 0x4C },
  190. { 0x46, 0x4A },
  191. { 0x47, 0x48 },
  192. { 0x48, 0x46 },
  193. { 0x49, 0x44 },
  194. { 0x4A, 0x40 },
  195. { 0x4B, 0x55 },
  196. { 0x4C, 0x52 },
  197. { 0x4D, 0x55 },
  198. { 0x4E, 0x55 },
  199. { 0x4F, 0x55 },
  200. { 0x50, 0x55 },
  201. { 0x51, 0x55 },
  202. { 0x52, 0x55 },
  203. { 0x53, 0x55 },
  204. { 0x54, 0x55 },
  205. { 0x55, 0x50 },
  206. { 0x56, 0x55 },
  207. { 0x57, 0x55 },
  208. { 0x58, 0x40 },
  209. { 0x59, 0x00 },
  210. { 0x5A, 0x00 },
  211. { 0x5B, 0x10 },
  212. { 0x5C, 0x09 },
  213. { 0x5D, 0x30 },
  214. { 0x5E, 0x01 },
  215. { 0x5F, 0x02 },
  216. { 0x60, 0x30 },
  217. { 0x61, 0x03 },
  218. { 0x62, 0x04 },
  219. { 0x63, 0x06 },
  220. { 0x64, 0x6A },
  221. { 0x65, 0x75 },
  222. { 0x66, 0x0F },
  223. { 0x67, 0xB3 },
  224. { 0x68, 0x0B },
  225. { 0x69, 0x06 },
  226. { 0x6A, 0x6A },
  227. { 0x6B, 0x10 },
  228. { 0x6C, 0x00 },
  229. { 0x6D, 0x04 },
  230. { 0x6E, 0x04 },
  231. { 0x6F, 0x88 },
  232. { 0x70, 0x00 },
  233. { 0x71, 0x00 },
  234. { 0x72, 0x06 },
  235. { 0x73, 0x7B },
  236. { 0x74, 0x00 },
  237. { 0x75, 0xBC },
  238. { 0x76, 0x00 },
  239. { 0x77, 0x05 },
  240. { 0x78, 0x2E },
  241. { 0x79, 0x00 },
  242. { 0x7A, 0x00 },
  243. { 0x7B, 0x00 },
  244. { 0x7C, 0x00 },
  245. { 0x7D, 0x03 },
  246. { 0x7E, 0x7B },
  247. { 0xE0, 0x04 },
  248. { 0x09, 0x10 },
  249. { 0x2B, 0x2B },
  250. { 0x2E, 0x44 },
  251. { 0xE0, 0x00 },
  252. { 0xE6, 0x02 },
  253. { 0xE7, 0x02 },
  254. { 0x35, 0x00 },
  255. };
  256. static inline
  257. struct ltk500hd1829 *panel_to_ltk500hd1829(struct drm_panel *panel)
  258. {
  259. return container_of(panel, struct ltk500hd1829, panel);
  260. }
  261. static int ltk500hd1829_unprepare(struct drm_panel *panel)
  262. {
  263. struct ltk500hd1829 *ctx = panel_to_ltk500hd1829(panel);
  264. struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
  265. int ret;
  266. if (!ctx->prepared)
  267. return 0;
  268. ret = mipi_dsi_dcs_set_display_off(dsi);
  269. if (ret < 0)
  270. dev_err(panel->dev, "failed to set display off: %d\n", ret);
  271. ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
  272. if (ret < 0) {
  273. dev_err(panel->dev, "failed to enter sleep mode: %d\n", ret);
  274. }
  275. /* 120ms to enter sleep mode */
  276. msleep(120);
  277. regulator_disable(ctx->iovcc);
  278. regulator_disable(ctx->vcc);
  279. ctx->prepared = false;
  280. return 0;
  281. }
  282. static int ltk500hd1829_prepare(struct drm_panel *panel)
  283. {
  284. struct ltk500hd1829 *ctx = panel_to_ltk500hd1829(panel);
  285. struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
  286. unsigned int i;
  287. int ret;
  288. if (ctx->prepared)
  289. return 0;
  290. ret = regulator_enable(ctx->vcc);
  291. if (ret < 0) {
  292. dev_err(ctx->dev, "Failed to enable vci supply: %d\n", ret);
  293. return ret;
  294. }
  295. ret = regulator_enable(ctx->iovcc);
  296. if (ret < 0) {
  297. dev_err(ctx->dev, "Failed to enable iovcc supply: %d\n", ret);
  298. goto disable_vcc;
  299. }
  300. gpiod_set_value_cansleep(ctx->reset_gpio, 1);
  301. /* tRW: 10us */
  302. usleep_range(10, 20);
  303. gpiod_set_value_cansleep(ctx->reset_gpio, 0);
  304. /* tRT: >= 5ms */
  305. usleep_range(5000, 6000);
  306. for (i = 0; i < ARRAY_SIZE(init_code); i++) {
  307. ret = mipi_dsi_generic_write(dsi, &init_code[i],
  308. sizeof(struct ltk500hd1829_cmd));
  309. if (ret < 0) {
  310. dev_err(panel->dev, "failed to write init cmds: %d\n", ret);
  311. goto disable_iovcc;
  312. }
  313. }
  314. ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
  315. if (ret < 0) {
  316. dev_err(panel->dev, "failed to exit sleep mode: %d\n", ret);
  317. goto disable_iovcc;
  318. }
  319. /* 120ms to exit sleep mode */
  320. msleep(120);
  321. ret = mipi_dsi_dcs_set_display_on(dsi);
  322. if (ret < 0) {
  323. dev_err(panel->dev, "failed to set display on: %d\n", ret);
  324. goto disable_iovcc;
  325. }
  326. ctx->prepared = true;
  327. return 0;
  328. disable_iovcc:
  329. regulator_disable(ctx->iovcc);
  330. disable_vcc:
  331. regulator_disable(ctx->vcc);
  332. return ret;
  333. }
  334. static const struct drm_display_mode default_mode = {
  335. .hdisplay = 720,
  336. .hsync_start = 720 + 50,
  337. .hsync_end = 720 + 50 + 50,
  338. .htotal = 720 + 50 + 50 + 50,
  339. .vdisplay = 1280,
  340. .vsync_start = 1280 + 30,
  341. .vsync_end = 1280 + 30 + 4,
  342. .vtotal = 1280 + 30 + 4 + 12,
  343. .clock = 69217,
  344. .width_mm = 62,
  345. .height_mm = 110,
  346. };
  347. static int ltk500hd1829_get_modes(struct drm_panel *panel,
  348. struct drm_connector *connector)
  349. {
  350. struct ltk500hd1829 *ctx = panel_to_ltk500hd1829(panel);
  351. struct drm_display_mode *mode;
  352. mode = drm_mode_duplicate(connector->dev, &default_mode);
  353. if (!mode) {
  354. dev_err(ctx->dev, "failed to add mode %ux%u@%u\n",
  355. default_mode.hdisplay, default_mode.vdisplay,
  356. drm_mode_vrefresh(&default_mode));
  357. return -ENOMEM;
  358. }
  359. drm_mode_set_name(mode);
  360. mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
  361. connector->display_info.width_mm = mode->width_mm;
  362. connector->display_info.height_mm = mode->height_mm;
  363. drm_mode_probed_add(connector, mode);
  364. return 1;
  365. }
  366. static const struct drm_panel_funcs ltk500hd1829_funcs = {
  367. .unprepare = ltk500hd1829_unprepare,
  368. .prepare = ltk500hd1829_prepare,
  369. .get_modes = ltk500hd1829_get_modes,
  370. };
  371. static int ltk500hd1829_probe(struct mipi_dsi_device *dsi)
  372. {
  373. struct ltk500hd1829 *ctx;
  374. struct device *dev = &dsi->dev;
  375. int ret;
  376. ctx = devm_kzalloc(&dsi->dev, sizeof(*ctx), GFP_KERNEL);
  377. if (!ctx)
  378. return -ENOMEM;
  379. ctx->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
  380. if (IS_ERR(ctx->reset_gpio)) {
  381. dev_err(dev, "cannot get reset gpio\n");
  382. return PTR_ERR(ctx->reset_gpio);
  383. }
  384. ctx->vcc = devm_regulator_get(dev, "vcc");
  385. if (IS_ERR(ctx->vcc)) {
  386. ret = PTR_ERR(ctx->vcc);
  387. if (ret != -EPROBE_DEFER)
  388. dev_err(dev, "Failed to request vcc regulator: %d\n", ret);
  389. return ret;
  390. }
  391. ctx->iovcc = devm_regulator_get(dev, "iovcc");
  392. if (IS_ERR(ctx->iovcc)) {
  393. ret = PTR_ERR(ctx->iovcc);
  394. if (ret != -EPROBE_DEFER)
  395. dev_err(dev, "Failed to request iovcc regulator: %d\n", ret);
  396. return ret;
  397. }
  398. mipi_dsi_set_drvdata(dsi, ctx);
  399. ctx->dev = dev;
  400. dsi->lanes = 4;
  401. dsi->format = MIPI_DSI_FMT_RGB888;
  402. dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |
  403. MIPI_DSI_MODE_LPM | MIPI_DSI_MODE_EOT_PACKET;
  404. drm_panel_init(&ctx->panel, &dsi->dev, &ltk500hd1829_funcs,
  405. DRM_MODE_CONNECTOR_DSI);
  406. ret = drm_panel_of_backlight(&ctx->panel);
  407. if (ret)
  408. return ret;
  409. drm_panel_add(&ctx->panel);
  410. ret = mipi_dsi_attach(dsi);
  411. if (ret < 0) {
  412. dev_err(dev, "mipi_dsi_attach failed: %d\n", ret);
  413. drm_panel_remove(&ctx->panel);
  414. return ret;
  415. }
  416. return 0;
  417. }
  418. static void ltk500hd1829_shutdown(struct mipi_dsi_device *dsi)
  419. {
  420. struct ltk500hd1829 *ctx = mipi_dsi_get_drvdata(dsi);
  421. int ret;
  422. ret = drm_panel_unprepare(&ctx->panel);
  423. if (ret < 0)
  424. dev_err(&dsi->dev, "Failed to unprepare panel: %d\n", ret);
  425. ret = drm_panel_disable(&ctx->panel);
  426. if (ret < 0)
  427. dev_err(&dsi->dev, "Failed to disable panel: %d\n", ret);
  428. }
  429. static int ltk500hd1829_remove(struct mipi_dsi_device *dsi)
  430. {
  431. struct ltk500hd1829 *ctx = mipi_dsi_get_drvdata(dsi);
  432. int ret;
  433. ltk500hd1829_shutdown(dsi);
  434. ret = mipi_dsi_detach(dsi);
  435. if (ret < 0)
  436. dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", ret);
  437. drm_panel_remove(&ctx->panel);
  438. return 0;
  439. }
  440. static const struct of_device_id ltk500hd1829_of_match[] = {
  441. { .compatible = "leadtek,ltk500hd1829", },
  442. { /* sentinel */ }
  443. };
  444. MODULE_DEVICE_TABLE(of, ltk500hd1829_of_match);
  445. static struct mipi_dsi_driver ltk500hd1829_driver = {
  446. .driver = {
  447. .name = "panel-leadtek-ltk500hd1829",
  448. .of_match_table = ltk500hd1829_of_match,
  449. },
  450. .probe = ltk500hd1829_probe,
  451. .remove = ltk500hd1829_remove,
  452. .shutdown = ltk500hd1829_shutdown,
  453. };
  454. module_mipi_dsi_driver(ltk500hd1829_driver);
  455. MODULE_AUTHOR("Heiko Stuebner <heiko.stuebner@theobroma-systems.com>");
  456. MODULE_DESCRIPTION("Leadtek LTK500HD1829 panel driver");
  457. MODULE_LICENSE("GPL v2");