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/phy/phy.h>
34 #include <linux/regulator/consumer.h>
35 #include <linux/pm_runtime.h>
36 #include <linux/err.h>
38 #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 = "vdd11", },
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);
105 exynos_mipi_dsi_init_interrupt(dsim);
108 * data from Display controller(FIMD) is transferred in video mode
109 * but in case of command mode, all settings are updated to registers.
111 exynos_mipi_dsi_stand_by(dsim, 1);
114 static int exynos_mipi_dsi_early_blank_mode(struct mipi_dsim_device *dsim,
117 struct mipi_dsim_lcd_driver *client_drv = dsim->dsim_lcd_drv;
118 struct mipi_dsim_lcd_device *client_dev = dsim->dsim_lcd_dev;
121 case FB_BLANK_POWERDOWN:
125 if (client_drv && client_drv->suspend)
126 client_drv->suspend(client_dev);
128 clk_disable(dsim->clock);
130 exynos_mipi_regulator_disable(dsim);
132 dsim->suspended = true;
142 static int exynos_mipi_dsi_blank_mode(struct mipi_dsim_device *dsim, int power)
144 struct platform_device *pdev = to_platform_device(dsim->dev);
145 struct mipi_dsim_lcd_driver *client_drv = dsim->dsim_lcd_drv;
146 struct mipi_dsim_lcd_device *client_dev = dsim->dsim_lcd_dev;
149 case FB_BLANK_UNBLANK:
150 if (!dsim->suspended)
153 /* lcd panel power on. */
154 if (client_drv && client_drv->power_on)
155 client_drv->power_on(client_dev, 1);
157 exynos_mipi_regulator_enable(dsim);
159 /* enable MIPI-DSI PHY. */
160 phy_power_on(dsim->phy);
162 clk_enable(dsim->clock);
164 exynos_mipi_update_cfg(dsim);
166 /* set lcd panel sequence commands. */
167 if (client_drv && client_drv->set_sequence)
168 client_drv->set_sequence(client_dev);
170 dsim->suspended = false;
173 case FB_BLANK_NORMAL:
183 int exynos_mipi_dsi_register_lcd_device(struct mipi_dsim_lcd_device *lcd_dev)
185 struct mipi_dsim_ddi *dsim_ddi;
187 if (!lcd_dev->name) {
188 pr_err("dsim_lcd_device name is NULL.\n");
192 dsim_ddi = kzalloc(sizeof(struct mipi_dsim_ddi), GFP_KERNEL);
194 pr_err("failed to allocate dsim_ddi object.\n");
198 dsim_ddi->dsim_lcd_dev = lcd_dev;
200 mutex_lock(&mipi_dsim_lock);
201 list_add_tail(&dsim_ddi->list, &dsim_ddi_list);
202 mutex_unlock(&mipi_dsim_lock);
207 static struct mipi_dsim_ddi *exynos_mipi_dsi_find_lcd_device(
208 struct mipi_dsim_lcd_driver *lcd_drv)
210 struct mipi_dsim_ddi *dsim_ddi, *next;
211 struct mipi_dsim_lcd_device *lcd_dev;
213 mutex_lock(&mipi_dsim_lock);
215 list_for_each_entry_safe(dsim_ddi, next, &dsim_ddi_list, list) {
219 lcd_dev = dsim_ddi->dsim_lcd_dev;
223 if ((strcmp(lcd_drv->name, lcd_dev->name)) == 0) {
225 * bus_id would be used to identify
228 dsim_ddi->bus_id = lcd_dev->bus_id;
229 mutex_unlock(&mipi_dsim_lock);
234 list_del(&dsim_ddi->list);
239 mutex_unlock(&mipi_dsim_lock);
244 int exynos_mipi_dsi_register_lcd_driver(struct mipi_dsim_lcd_driver *lcd_drv)
246 struct mipi_dsim_ddi *dsim_ddi;
248 if (!lcd_drv->name) {
249 pr_err("dsim_lcd_driver name is NULL.\n");
253 dsim_ddi = exynos_mipi_dsi_find_lcd_device(lcd_drv);
255 pr_err("mipi_dsim_ddi object not found.\n");
259 dsim_ddi->dsim_lcd_drv = lcd_drv;
261 pr_info("registered panel driver(%s) to mipi-dsi driver.\n",
268 static struct mipi_dsim_ddi *exynos_mipi_dsi_bind_lcd_ddi(
269 struct mipi_dsim_device *dsim,
272 struct mipi_dsim_ddi *dsim_ddi, *next;
273 struct mipi_dsim_lcd_driver *lcd_drv;
274 struct mipi_dsim_lcd_device *lcd_dev;
277 mutex_lock(&dsim->lock);
279 list_for_each_entry_safe(dsim_ddi, next, &dsim_ddi_list, list) {
280 lcd_drv = dsim_ddi->dsim_lcd_drv;
281 lcd_dev = dsim_ddi->dsim_lcd_dev;
282 if (!lcd_drv || !lcd_dev ||
283 (dsim->id != dsim_ddi->bus_id))
286 dev_dbg(dsim->dev, "lcd_drv->id = %d, lcd_dev->id = %d\n",
287 lcd_drv->id, lcd_dev->id);
288 dev_dbg(dsim->dev, "lcd_dev->bus_id = %d, dsim->id = %d\n",
289 lcd_dev->bus_id, dsim->id);
291 if ((strcmp(lcd_drv->name, name) == 0)) {
292 lcd_dev->master = dsim;
294 lcd_dev->dev.parent = dsim->dev;
295 dev_set_name(&lcd_dev->dev, "%s", lcd_drv->name);
297 ret = device_register(&lcd_dev->dev);
300 "can't register %s, status %d\n",
301 dev_name(&lcd_dev->dev), ret);
302 mutex_unlock(&dsim->lock);
307 dsim->dsim_lcd_dev = lcd_dev;
308 dsim->dsim_lcd_drv = lcd_drv;
310 mutex_unlock(&dsim->lock);
316 mutex_unlock(&dsim->lock);
321 /* define MIPI-DSI Master operations. */
322 static struct mipi_dsim_master_ops master_ops = {
323 .cmd_read = exynos_mipi_dsi_rd_data,
324 .cmd_write = exynos_mipi_dsi_wr_data,
325 .get_dsim_frame_done = exynos_mipi_dsi_get_frame_done_status,
326 .clear_dsim_frame_done = exynos_mipi_dsi_clear_frame_done,
327 .set_early_blank_mode = exynos_mipi_dsi_early_blank_mode,
328 .set_blank_mode = exynos_mipi_dsi_blank_mode,
331 static int exynos_mipi_dsi_probe(struct platform_device *pdev)
333 struct resource *res;
334 struct mipi_dsim_device *dsim;
335 struct mipi_dsim_config *dsim_config;
336 struct mipi_dsim_platform_data *dsim_pd;
337 struct mipi_dsim_ddi *dsim_ddi;
340 dsim = devm_kzalloc(&pdev->dev, sizeof(struct mipi_dsim_device),
343 dev_err(&pdev->dev, "failed to allocate dsim object.\n");
347 dsim->pd = to_dsim_plat(pdev);
348 dsim->dev = &pdev->dev;
351 /* get mipi_dsim_platform_data. */
352 dsim_pd = (struct mipi_dsim_platform_data *)dsim->pd;
353 if (dsim_pd == NULL) {
354 dev_err(&pdev->dev, "failed to get platform data for dsim.\n");
357 /* get mipi_dsim_config. */
358 dsim_config = dsim_pd->dsim_config;
359 if (dsim_config == NULL) {
360 dev_err(&pdev->dev, "failed to get dsim config data.\n");
364 dsim->dsim_config = dsim_config;
365 dsim->master_ops = &master_ops;
367 mutex_init(&dsim->lock);
369 ret = devm_regulator_bulk_get(&pdev->dev, ARRAY_SIZE(supplies),
372 dev_err(&pdev->dev, "Failed to get regulators: %d\n", ret);
376 dsim->phy = devm_phy_get(&pdev->dev, "dsim");
377 if (IS_ERR(dsim->phy))
378 return PTR_ERR(dsim->phy);
380 dsim->clock = devm_clk_get(&pdev->dev, "dsim0");
381 if (IS_ERR(dsim->clock)) {
382 dev_err(&pdev->dev, "failed to get dsim clock source\n");
386 clk_enable(dsim->clock);
388 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
390 dsim->reg_base = devm_ioremap_resource(&pdev->dev, res);
391 if (IS_ERR(dsim->reg_base)) {
392 ret = PTR_ERR(dsim->reg_base);
396 mutex_init(&dsim->lock);
398 /* bind lcd ddi matched with panel name. */
399 dsim_ddi = exynos_mipi_dsi_bind_lcd_ddi(dsim, dsim_pd->lcd_panel_name);
401 dev_err(&pdev->dev, "mipi_dsim_ddi object not found.\n");
406 dsim->irq = platform_get_irq(pdev, 0);
407 if (IS_ERR_VALUE(dsim->irq)) {
408 dev_err(&pdev->dev, "failed to request dsim irq resource\n");
413 init_completion(&dsim_wr_comp);
414 init_completion(&dsim_rd_comp);
415 platform_set_drvdata(pdev, dsim);
417 ret = devm_request_irq(&pdev->dev, dsim->irq,
418 exynos_mipi_dsi_interrupt_handler,
419 IRQF_SHARED, dev_name(&pdev->dev), dsim);
421 dev_err(&pdev->dev, "failed to request dsim irq\n");
426 /* enable interrupts */
427 exynos_mipi_dsi_init_interrupt(dsim);
429 /* initialize mipi-dsi client(lcd panel). */
430 if (dsim_ddi->dsim_lcd_drv && dsim_ddi->dsim_lcd_drv->probe)
431 dsim_ddi->dsim_lcd_drv->probe(dsim_ddi->dsim_lcd_dev);
433 /* in case mipi-dsi has been enabled by bootloader */
434 if (dsim_pd->enabled) {
435 exynos_mipi_regulator_enable(dsim);
439 /* lcd panel power on. */
440 if (dsim_ddi->dsim_lcd_drv && dsim_ddi->dsim_lcd_drv->power_on)
441 dsim_ddi->dsim_lcd_drv->power_on(dsim_ddi->dsim_lcd_dev, 1);
443 exynos_mipi_regulator_enable(dsim);
445 /* enable MIPI-DSI PHY. */
446 phy_power_on(dsim->phy);
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, "%s() completed successfully (%s mode)\n", __func__,
460 dsim_config->e_interface == DSIM_COMMAND ? "CPU" : "RGB");
465 clk_disable(dsim->clock);
469 static int exynos_mipi_dsi_remove(struct platform_device *pdev)
471 struct mipi_dsim_device *dsim = platform_get_drvdata(pdev);
472 struct mipi_dsim_ddi *dsim_ddi, *next;
473 struct mipi_dsim_lcd_driver *dsim_lcd_drv;
475 clk_disable(dsim->clock);
477 list_for_each_entry_safe(dsim_ddi, next, &dsim_ddi_list, list) {
479 if (dsim->id != dsim_ddi->bus_id)
482 dsim_lcd_drv = dsim_ddi->dsim_lcd_drv;
484 if (dsim_lcd_drv->remove)
485 dsim_lcd_drv->remove(dsim_ddi->dsim_lcd_dev);
494 #ifdef CONFIG_PM_SLEEP
495 static int exynos_mipi_dsi_suspend(struct device *dev)
497 struct platform_device *pdev = to_platform_device(dev);
498 struct mipi_dsim_device *dsim = platform_get_drvdata(pdev);
499 struct mipi_dsim_lcd_driver *client_drv = dsim->dsim_lcd_drv;
500 struct mipi_dsim_lcd_device *client_dev = dsim->dsim_lcd_dev;
502 disable_irq(dsim->irq);
507 if (client_drv && client_drv->suspend)
508 client_drv->suspend(client_dev);
510 /* disable MIPI-DSI PHY. */
511 phy_power_off(dsim->phy);
513 clk_disable(dsim->clock);
515 exynos_mipi_regulator_disable(dsim);
517 dsim->suspended = true;
522 static int exynos_mipi_dsi_resume(struct device *dev)
524 struct platform_device *pdev = to_platform_device(dev);
525 struct mipi_dsim_device *dsim = platform_get_drvdata(pdev);
526 struct mipi_dsim_lcd_driver *client_drv = dsim->dsim_lcd_drv;
527 struct mipi_dsim_lcd_device *client_dev = dsim->dsim_lcd_dev;
529 enable_irq(dsim->irq);
531 if (!dsim->suspended)
534 /* lcd panel power on. */
535 if (client_drv && client_drv->power_on)
536 client_drv->power_on(client_dev, 1);
538 exynos_mipi_regulator_enable(dsim);
540 /* enable MIPI-DSI PHY. */
541 phy_power_on(dsim->phy);
543 clk_enable(dsim->clock);
545 exynos_mipi_update_cfg(dsim);
547 /* set lcd panel sequence commands. */
548 if (client_drv && client_drv->set_sequence)
549 client_drv->set_sequence(client_dev);
551 dsim->suspended = false;
557 static const struct dev_pm_ops exynos_mipi_dsi_pm_ops = {
558 SET_SYSTEM_SLEEP_PM_OPS(exynos_mipi_dsi_suspend, exynos_mipi_dsi_resume)
561 static struct platform_driver exynos_mipi_dsi_driver = {
562 .probe = exynos_mipi_dsi_probe,
563 .remove = exynos_mipi_dsi_remove,
565 .name = "exynos-mipi-dsim",
566 .owner = THIS_MODULE,
567 .pm = &exynos_mipi_dsi_pm_ops,
571 module_platform_driver(exynos_mipi_dsi_driver);
573 MODULE_AUTHOR("InKi Dae <inki.dae@samsung.com>");
574 MODULE_DESCRIPTION("Samusung SoC MIPI-DSI driver");
575 MODULE_LICENSE("GPL");