1 /* linux/drivers/video/exynos/exynos_mipi_dsi.c
3 * Samsung SoC MIPI-DSIM driver.
5 * Copyright (c) 2012 Samsung Electronics Co., Ltd
7 * InKi Dae, <inki.dae@samsung.com>
8 * Donghwa Lee, <dh09.lee@samsung.com>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
15 #include <linux/module.h>
16 #include <linux/kernel.h>
17 #include <linux/errno.h>
18 #include <linux/clk.h>
19 #include <linux/mutex.h>
20 #include <linux/wait.h>
24 #include <linux/ctype.h>
25 #include <linux/platform_device.h>
27 #include <linux/irq.h>
28 #include <linux/memory.h>
29 #include <linux/delay.h>
30 #include <linux/interrupt.h>
31 #include <linux/kthread.h>
32 #include <linux/notifier.h>
33 #include <linux/regulator/consumer.h>
34 #include <linux/pm_runtime.h>
36 #include <video/exynos_mipi_dsim.h>
40 #include "exynos_mipi_dsi_common.h"
41 #include "exynos_mipi_dsi_lowlevel.h"
43 struct mipi_dsim_ddi {
45 struct list_head list;
46 struct mipi_dsim_lcd_device *dsim_lcd_dev;
47 struct mipi_dsim_lcd_driver *dsim_lcd_drv;
50 static LIST_HEAD(dsim_ddi_list);
52 static DEFINE_MUTEX(mipi_dsim_lock);
54 static struct mipi_dsim_platform_data *to_dsim_plat(struct platform_device
57 return pdev->dev.platform_data;
60 static struct regulator_bulk_data supplies[] = {
61 { .supply = "vdd10", },
62 { .supply = "vdd18", },
65 static int exynos_mipi_regulator_enable(struct mipi_dsim_device *dsim)
69 mutex_lock(&dsim->lock);
70 ret = regulator_bulk_enable(ARRAY_SIZE(supplies), supplies);
71 mutex_unlock(&dsim->lock);
76 static int exynos_mipi_regulator_disable(struct mipi_dsim_device *dsim)
80 mutex_lock(&dsim->lock);
81 ret = regulator_bulk_disable(ARRAY_SIZE(supplies), supplies);
82 mutex_unlock(&dsim->lock);
87 /* update all register settings to MIPI DSI controller. */
88 static void exynos_mipi_update_cfg(struct mipi_dsim_device *dsim)
91 * data from Display controller(FIMD) is not transferred in video mode
92 * but in case of command mode, all settings is not updated to
95 exynos_mipi_dsi_stand_by(dsim, 0);
97 exynos_mipi_dsi_init_dsim(dsim);
98 exynos_mipi_dsi_init_link(dsim);
100 exynos_mipi_dsi_set_hs_enable(dsim);
102 /* set display timing. */
103 exynos_mipi_dsi_set_display_mode(dsim, dsim->dsim_config);
106 * data from Display controller(FIMD) is transferred in video mode
107 * but in case of command mode, all settings are updated to registers.
109 exynos_mipi_dsi_stand_by(dsim, 1);
112 static int exynos_mipi_dsi_early_blank_mode(struct mipi_dsim_device *dsim,
115 struct mipi_dsim_lcd_driver *client_drv = dsim->dsim_lcd_drv;
116 struct mipi_dsim_lcd_device *client_dev = dsim->dsim_lcd_dev;
119 case FB_BLANK_POWERDOWN:
123 if (client_drv && client_drv->suspend)
124 client_drv->suspend(client_dev);
126 clk_disable(dsim->clock);
128 exynos_mipi_regulator_disable(dsim);
130 dsim->suspended = true;
140 static int exynos_mipi_dsi_blank_mode(struct mipi_dsim_device *dsim, int power)
142 struct platform_device *pdev = to_platform_device(dsim->dev);
143 struct mipi_dsim_lcd_driver *client_drv = dsim->dsim_lcd_drv;
144 struct mipi_dsim_lcd_device *client_dev = dsim->dsim_lcd_dev;
147 case FB_BLANK_UNBLANK:
148 if (!dsim->suspended)
151 /* lcd panel power on. */
152 if (client_drv && client_drv->power_on)
153 client_drv->power_on(client_dev, 1);
155 exynos_mipi_regulator_disable(dsim);
157 /* enable MIPI-DSI PHY. */
158 if (dsim->pd->phy_enable)
159 dsim->pd->phy_enable(pdev, true);
161 clk_enable(dsim->clock);
163 exynos_mipi_update_cfg(dsim);
165 /* set lcd panel sequence commands. */
166 if (client_drv && client_drv->set_sequence)
167 client_drv->set_sequence(client_dev);
169 dsim->suspended = false;
172 case FB_BLANK_NORMAL:
182 int exynos_mipi_dsi_register_lcd_device(struct mipi_dsim_lcd_device *lcd_dev)
184 struct mipi_dsim_ddi *dsim_ddi;
186 if (!lcd_dev->name) {
187 pr_err("dsim_lcd_device name is NULL.\n");
191 dsim_ddi = kzalloc(sizeof(struct mipi_dsim_ddi), GFP_KERNEL);
193 pr_err("failed to allocate dsim_ddi object.\n");
197 dsim_ddi->dsim_lcd_dev = lcd_dev;
199 mutex_lock(&mipi_dsim_lock);
200 list_add_tail(&dsim_ddi->list, &dsim_ddi_list);
201 mutex_unlock(&mipi_dsim_lock);
206 struct mipi_dsim_ddi *exynos_mipi_dsi_find_lcd_device(struct mipi_dsim_lcd_driver *lcd_drv)
208 struct mipi_dsim_ddi *dsim_ddi, *next;
209 struct mipi_dsim_lcd_device *lcd_dev;
211 mutex_lock(&mipi_dsim_lock);
213 list_for_each_entry_safe(dsim_ddi, next, &dsim_ddi_list, list) {
217 lcd_dev = dsim_ddi->dsim_lcd_dev;
221 if ((strcmp(lcd_drv->name, lcd_dev->name)) == 0) {
223 * bus_id would be used to identify
226 dsim_ddi->bus_id = lcd_dev->bus_id;
227 mutex_unlock(&mipi_dsim_lock);
232 list_del(&dsim_ddi->list);
237 mutex_unlock(&mipi_dsim_lock);
242 int exynos_mipi_dsi_register_lcd_driver(struct mipi_dsim_lcd_driver *lcd_drv)
244 struct mipi_dsim_ddi *dsim_ddi;
246 if (!lcd_drv->name) {
247 pr_err("dsim_lcd_driver name is NULL.\n");
251 dsim_ddi = exynos_mipi_dsi_find_lcd_device(lcd_drv);
253 pr_err("mipi_dsim_ddi object not found.\n");
257 dsim_ddi->dsim_lcd_drv = lcd_drv;
259 pr_info("registered panel driver(%s) to mipi-dsi driver.\n",
266 struct mipi_dsim_ddi *exynos_mipi_dsi_bind_lcd_ddi(struct mipi_dsim_device *dsim,
269 struct mipi_dsim_ddi *dsim_ddi, *next;
270 struct mipi_dsim_lcd_driver *lcd_drv;
271 struct mipi_dsim_lcd_device *lcd_dev;
274 mutex_lock(&dsim->lock);
276 list_for_each_entry_safe(dsim_ddi, next, &dsim_ddi_list, list) {
277 lcd_drv = dsim_ddi->dsim_lcd_drv;
278 lcd_dev = dsim_ddi->dsim_lcd_dev;
279 if (!lcd_drv || !lcd_dev ||
280 (dsim->id != dsim_ddi->bus_id))
283 dev_dbg(dsim->dev, "lcd_drv->id = %d, lcd_dev->id = %d\n",
284 lcd_drv->id, lcd_dev->id);
285 dev_dbg(dsim->dev, "lcd_dev->bus_id = %d, dsim->id = %d\n",
286 lcd_dev->bus_id, dsim->id);
288 if ((strcmp(lcd_drv->name, name) == 0)) {
289 lcd_dev->master = dsim;
291 lcd_dev->dev.parent = dsim->dev;
292 dev_set_name(&lcd_dev->dev, "%s", lcd_drv->name);
294 ret = device_register(&lcd_dev->dev);
297 "can't register %s, status %d\n",
298 dev_name(&lcd_dev->dev), ret);
299 mutex_unlock(&dsim->lock);
304 dsim->dsim_lcd_dev = lcd_dev;
305 dsim->dsim_lcd_drv = lcd_drv;
307 mutex_unlock(&dsim->lock);
313 mutex_unlock(&dsim->lock);
318 /* define MIPI-DSI Master operations. */
319 static struct mipi_dsim_master_ops master_ops = {
320 .cmd_read = exynos_mipi_dsi_rd_data,
321 .cmd_write = exynos_mipi_dsi_wr_data,
322 .get_dsim_frame_done = exynos_mipi_dsi_get_frame_done_status,
323 .clear_dsim_frame_done = exynos_mipi_dsi_clear_frame_done,
324 .set_early_blank_mode = exynos_mipi_dsi_early_blank_mode,
325 .set_blank_mode = exynos_mipi_dsi_blank_mode,
328 static int exynos_mipi_dsi_probe(struct platform_device *pdev)
330 struct resource *res;
331 struct mipi_dsim_device *dsim;
332 struct mipi_dsim_config *dsim_config;
333 struct mipi_dsim_platform_data *dsim_pd;
334 struct mipi_dsim_ddi *dsim_ddi;
337 dsim = kzalloc(sizeof(struct mipi_dsim_device), GFP_KERNEL);
339 dev_err(&pdev->dev, "failed to allocate dsim object.\n");
343 dsim->pd = to_dsim_plat(pdev);
344 dsim->dev = &pdev->dev;
347 /* get mipi_dsim_platform_data. */
348 dsim_pd = (struct mipi_dsim_platform_data *)dsim->pd;
349 if (dsim_pd == NULL) {
350 dev_err(&pdev->dev, "failed to get platform data for dsim.\n");
353 /* get mipi_dsim_config. */
354 dsim_config = dsim_pd->dsim_config;
355 if (dsim_config == NULL) {
356 dev_err(&pdev->dev, "failed to get dsim config data.\n");
360 dsim->dsim_config = dsim_config;
361 dsim->master_ops = &master_ops;
363 mutex_init(&dsim->lock);
365 ret = regulator_bulk_get(&pdev->dev, ARRAY_SIZE(supplies), supplies);
367 dev_err(&pdev->dev, "Failed to get regulators: %d\n", ret);
371 dsim->clock = clk_get(&pdev->dev, "dsim0");
372 if (IS_ERR(dsim->clock)) {
373 dev_err(&pdev->dev, "failed to get dsim clock source\n");
377 clk_enable(dsim->clock);
379 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
381 dev_err(&pdev->dev, "failed to get io memory region\n");
382 goto err_platform_get;
385 dsim->res = request_mem_region(res->start, resource_size(res),
386 dev_name(&pdev->dev));
388 dev_err(&pdev->dev, "failed to request io memory region\n");
393 dsim->reg_base = ioremap(res->start, resource_size(res));
394 if (!dsim->reg_base) {
395 dev_err(&pdev->dev, "failed to remap io region\n");
400 mutex_init(&dsim->lock);
402 /* bind lcd ddi matched with panel name. */
403 dsim_ddi = exynos_mipi_dsi_bind_lcd_ddi(dsim, dsim_pd->lcd_panel_name);
405 dev_err(&pdev->dev, "mipi_dsim_ddi object not found.\n");
409 dsim->irq = platform_get_irq(pdev, 0);
411 dev_err(&pdev->dev, "failed to request dsim irq resource\n");
413 goto err_platform_get_irq;
416 ret = request_irq(dsim->irq, exynos_mipi_dsi_interrupt_handler,
417 IRQF_SHARED, pdev->name, dsim);
419 dev_err(&pdev->dev, "failed to request dsim irq\n");
424 init_completion(&dsim_wr_comp);
425 init_completion(&dsim_rd_comp);
427 /* enable interrupt */
428 exynos_mipi_dsi_init_interrupt(dsim);
430 /* initialize mipi-dsi client(lcd panel). */
431 if (dsim_ddi->dsim_lcd_drv && dsim_ddi->dsim_lcd_drv->probe)
432 dsim_ddi->dsim_lcd_drv->probe(dsim_ddi->dsim_lcd_dev);
434 /* in case that mipi got enabled at bootloader. */
435 if (dsim_pd->enabled)
438 /* lcd panel power on. */
439 if (dsim_ddi->dsim_lcd_drv && dsim_ddi->dsim_lcd_drv->power_on)
440 dsim_ddi->dsim_lcd_drv->power_on(dsim_ddi->dsim_lcd_dev, 1);
442 exynos_mipi_regulator_enable(dsim);
444 /* enable MIPI-DSI PHY. */
445 if (dsim->pd->phy_enable)
446 dsim->pd->phy_enable(pdev, true);
448 exynos_mipi_update_cfg(dsim);
450 /* set lcd panel sequence commands. */
451 if (dsim_ddi->dsim_lcd_drv && dsim_ddi->dsim_lcd_drv->set_sequence)
452 dsim_ddi->dsim_lcd_drv->set_sequence(dsim_ddi->dsim_lcd_dev);
454 dsim->suspended = false;
457 platform_set_drvdata(pdev, dsim);
459 dev_dbg(&pdev->dev, "mipi-dsi driver(%s mode) has been probed.\n",
460 (dsim_config->e_interface == DSIM_COMMAND) ?
466 iounmap(dsim->reg_base);
469 release_mem_region(dsim->res->start, resource_size(dsim->res));
472 release_resource(dsim->res);
475 clk_disable(dsim->clock);
476 clk_put(dsim->clock);
480 err_platform_get_irq:
484 static int __devexit exynos_mipi_dsi_remove(struct platform_device *pdev)
486 struct mipi_dsim_device *dsim = platform_get_drvdata(pdev);
487 struct mipi_dsim_ddi *dsim_ddi, *next;
488 struct mipi_dsim_lcd_driver *dsim_lcd_drv;
490 iounmap(dsim->reg_base);
492 clk_disable(dsim->clock);
493 clk_put(dsim->clock);
495 release_resource(dsim->res);
496 release_mem_region(dsim->res->start, resource_size(dsim->res));
498 list_for_each_entry_safe(dsim_ddi, next, &dsim_ddi_list, list) {
500 if (dsim->id != dsim_ddi->bus_id)
503 dsim_lcd_drv = dsim_ddi->dsim_lcd_drv;
505 if (dsim_lcd_drv->remove)
506 dsim_lcd_drv->remove(dsim_ddi->dsim_lcd_dev);
512 regulator_bulk_free(ARRAY_SIZE(supplies), supplies);
519 static int exynos_mipi_dsi_suspend(struct platform_device *pdev,
522 struct mipi_dsim_device *dsim = platform_get_drvdata(pdev);
523 struct mipi_dsim_lcd_driver *client_drv = dsim->dsim_lcd_drv;
524 struct mipi_dsim_lcd_device *client_dev = dsim->dsim_lcd_dev;
526 disable_irq(dsim->irq);
531 if (client_drv && client_drv->suspend)
532 client_drv->suspend(client_dev);
534 /* enable MIPI-DSI PHY. */
535 if (dsim->pd->phy_enable)
536 dsim->pd->phy_enable(pdev, false);
538 clk_disable(dsim->clock);
540 exynos_mipi_regulator_disable(dsim);
542 dsim->suspended = true;
547 static int exynos_mipi_dsi_resume(struct platform_device *pdev)
549 struct mipi_dsim_device *dsim = platform_get_drvdata(pdev);
550 struct mipi_dsim_lcd_driver *client_drv = dsim->dsim_lcd_drv;
551 struct mipi_dsim_lcd_device *client_dev = dsim->dsim_lcd_dev;
553 enable_irq(dsim->irq);
555 if (!dsim->suspended)
558 /* lcd panel power on. */
559 if (client_drv && client_drv->power_on)
560 client_drv->power_on(client_dev, 1);
562 exynos_mipi_regulator_enable(dsim);
564 /* enable MIPI-DSI PHY. */
565 if (dsim->pd->phy_enable)
566 dsim->pd->phy_enable(pdev, true);
568 clk_enable(dsim->clock);
570 exynos_mipi_update_cfg(dsim);
572 /* set lcd panel sequence commands. */
573 if (client_drv && client_drv->set_sequence)
574 client_drv->set_sequence(client_dev);
576 dsim->suspended = false;
581 #define exynos_mipi_dsi_suspend NULL
582 #define exynos_mipi_dsi_resume NULL
585 static struct platform_driver exynos_mipi_dsi_driver = {
586 .probe = exynos_mipi_dsi_probe,
587 .remove = __devexit_p(exynos_mipi_dsi_remove),
588 .suspend = exynos_mipi_dsi_suspend,
589 .resume = exynos_mipi_dsi_resume,
591 .name = "exynos-mipi-dsim",
592 .owner = THIS_MODULE,
596 module_platform_driver(exynos_mipi_dsi_driver);
598 MODULE_AUTHOR("InKi Dae <inki.dae@samsung.com>");
599 MODULE_DESCRIPTION("Samusung SoC MIPI-DSI driver");
600 MODULE_LICENSE("GPL");