video: support MIPI-DSI controller driver
Samsung S5PC210 and EXYNOS SoC platform has MIPI-DSI controller and
MIPI-DSI based LCD Panel could be used with it. This patch supports
MIPI-DSI driver based Samsung SoC chip.
LCD panel driver based MIPI-DSI should be registered to MIPI-DSI driver at
machine code and LCD panel driver specific function registered to
mipi_dsim_ddi structure at lcd panel init function called system init. In
the MIPI-DSI driver, find lcd panel driver by using registered lcd panel
name, and then initialize lcd panel driver.
Signed-off-by: Donghwa Lee <dh09.lee@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Jingoo Han <jg1.han@samsung.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
diff --git a/drivers/video/exynos/exynos_mipi_dsi.c b/drivers/video/exynos/exynos_mipi_dsi.c
new file mode 100644
index 0000000..557091d
--- /dev/null
+++ b/drivers/video/exynos/exynos_mipi_dsi.c
@@ -0,0 +1,600 @@
+/* linux/drivers/video/exynos/exynos_mipi_dsi.c
+ *
+ * Samsung SoC MIPI-DSIM driver.
+ *
+ * Copyright (c) 2012 Samsung Electronics Co., Ltd
+ *
+ * InKi Dae, <inki.dae@samsung.com>
+ * Donghwa Lee, <dh09.lee@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/clk.h>
+#include <linux/mutex.h>
+#include <linux/wait.h>
+#include <linux/fs.h>
+#include <linux/mm.h>
+#include <linux/fb.h>
+#include <linux/ctype.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/memory.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/kthread.h>
+#include <linux/notifier.h>
+#include <linux/regulator/consumer.h>
+#include <linux/pm_runtime.h>
+
+#include <video/exynos_mipi_dsim.h>
+
+#include <plat/fb.h>
+
+#include "exynos_mipi_dsi_common.h"
+#include "exynos_mipi_dsi_lowlevel.h"
+
+struct mipi_dsim_ddi {
+ int bus_id;
+ struct list_head list;
+ struct mipi_dsim_lcd_device *dsim_lcd_dev;
+ struct mipi_dsim_lcd_driver *dsim_lcd_drv;
+};
+
+static LIST_HEAD(dsim_ddi_list);
+
+static DEFINE_MUTEX(mipi_dsim_lock);
+
+static struct mipi_dsim_platform_data *to_dsim_plat(struct platform_device
+ *pdev)
+{
+ return pdev->dev.platform_data;
+}
+
+static struct regulator_bulk_data supplies[] = {
+ { .supply = "vdd10", },
+ { .supply = "vdd18", },
+};
+
+static int exynos_mipi_regulator_enable(struct mipi_dsim_device *dsim)
+{
+ int ret;
+
+ mutex_lock(&dsim->lock);
+ ret = regulator_bulk_enable(ARRAY_SIZE(supplies), supplies);
+ mutex_unlock(&dsim->lock);
+
+ return ret;
+}
+
+static int exynos_mipi_regulator_disable(struct mipi_dsim_device *dsim)
+{
+ int ret;
+
+ mutex_lock(&dsim->lock);
+ ret = regulator_bulk_disable(ARRAY_SIZE(supplies), supplies);
+ mutex_unlock(&dsim->lock);
+
+ return ret;
+}
+
+/* update all register settings to MIPI DSI controller. */
+static void exynos_mipi_update_cfg(struct mipi_dsim_device *dsim)
+{
+ /*
+ * data from Display controller(FIMD) is not transferred in video mode
+ * but in case of command mode, all settings is not updated to
+ * registers.
+ */
+ exynos_mipi_dsi_stand_by(dsim, 0);
+
+ exynos_mipi_dsi_init_dsim(dsim);
+ exynos_mipi_dsi_init_link(dsim);
+
+ exynos_mipi_dsi_set_hs_enable(dsim);
+
+ /* set display timing. */
+ exynos_mipi_dsi_set_display_mode(dsim, dsim->dsim_config);
+
+ /*
+ * data from Display controller(FIMD) is transferred in video mode
+ * but in case of command mode, all settigs is updated to registers.
+ */
+ exynos_mipi_dsi_stand_by(dsim, 1);
+}
+
+static int exynos_mipi_dsi_early_blank_mode(struct mipi_dsim_device *dsim,
+ int power)
+{
+ struct mipi_dsim_lcd_driver *client_drv = dsim->dsim_lcd_drv;
+ struct mipi_dsim_lcd_device *client_dev = dsim->dsim_lcd_dev;
+
+ switch (power) {
+ case FB_BLANK_POWERDOWN:
+ if (dsim->suspended)
+ return 0;
+
+ if (client_drv && client_drv->suspend)
+ client_drv->suspend(client_dev);
+
+ clk_disable(dsim->clock);
+
+ exynos_mipi_regulator_disable(dsim);
+
+ dsim->suspended = true;
+
+ break;
+ default:
+ break;
+ }
+
+ return 0;
+}
+
+static int exynos_mipi_dsi_blank_mode(struct mipi_dsim_device *dsim, int power)
+{
+ struct platform_device *pdev = to_platform_device(dsim->dev);
+ struct mipi_dsim_lcd_driver *client_drv = dsim->dsim_lcd_drv;
+ struct mipi_dsim_lcd_device *client_dev = dsim->dsim_lcd_dev;
+
+ switch (power) {
+ case FB_BLANK_UNBLANK:
+ if (!dsim->suspended)
+ return 0;
+
+ /* lcd panel power on. */
+ if (client_drv && client_drv->power_on)
+ client_drv->power_on(client_dev, 1);
+
+ exynos_mipi_regulator_disable(dsim);
+
+ /* enable MIPI-DSI PHY. */
+ if (dsim->pd->phy_enable)
+ dsim->pd->phy_enable(pdev, true);
+
+ clk_enable(dsim->clock);
+
+ exynos_mipi_update_cfg(dsim);
+
+ /* set lcd panel sequence commands. */
+ if (client_drv && client_drv->set_sequence)
+ client_drv->set_sequence(client_dev);
+
+ dsim->suspended = false;
+
+ break;
+ case FB_BLANK_NORMAL:
+ /* TODO. */
+ break;
+ default:
+ break;
+ }
+
+ return 0;
+}
+
+int exynos_mipi_dsi_register_lcd_device(struct mipi_dsim_lcd_device *lcd_dev)
+{
+ struct mipi_dsim_ddi *dsim_ddi;
+
+ if (!lcd_dev->name) {
+ pr_err("dsim_lcd_device name is NULL.\n");
+ return -EFAULT;
+ }
+
+ dsim_ddi = kzalloc(sizeof(struct mipi_dsim_ddi), GFP_KERNEL);
+ if (!dsim_ddi) {
+ pr_err("failed to allocate dsim_ddi object.\n");
+ return -ENOMEM;
+ }
+
+ dsim_ddi->dsim_lcd_dev = lcd_dev;
+
+ mutex_lock(&mipi_dsim_lock);
+ list_add_tail(&dsim_ddi->list, &dsim_ddi_list);
+ mutex_unlock(&mipi_dsim_lock);
+
+ return 0;
+}
+
+struct mipi_dsim_ddi *exynos_mipi_dsi_find_lcd_device(struct mipi_dsim_lcd_driver *lcd_drv)
+{
+ struct mipi_dsim_ddi *dsim_ddi, *next;
+ struct mipi_dsim_lcd_device *lcd_dev;
+
+ mutex_lock(&mipi_dsim_lock);
+
+ list_for_each_entry_safe(dsim_ddi, next, &dsim_ddi_list, list) {
+ if (!dsim_ddi)
+ goto out;
+
+ lcd_dev = dsim_ddi->dsim_lcd_dev;
+ if (!lcd_dev)
+ continue;
+
+ if ((strcmp(lcd_drv->name, lcd_dev->name)) == 0) {
+ /**
+ * bus_id would be used to identify
+ * connected bus.
+ */
+ dsim_ddi->bus_id = lcd_dev->bus_id;
+ mutex_unlock(&mipi_dsim_lock);
+
+ return dsim_ddi;
+ }
+
+ list_del(&dsim_ddi->list);
+ kfree(dsim_ddi);
+ }
+
+out:
+ mutex_unlock(&mipi_dsim_lock);
+
+ return NULL;
+}
+
+int exynos_mipi_dsi_register_lcd_driver(struct mipi_dsim_lcd_driver *lcd_drv)
+{
+ struct mipi_dsim_ddi *dsim_ddi;
+
+ if (!lcd_drv->name) {
+ pr_err("dsim_lcd_driver name is NULL.\n");
+ return -EFAULT;
+ }
+
+ dsim_ddi = exynos_mipi_dsi_find_lcd_device(lcd_drv);
+ if (!dsim_ddi) {
+ pr_err("mipi_dsim_ddi object not found.\n");
+ return -EFAULT;
+ }
+
+ dsim_ddi->dsim_lcd_drv = lcd_drv;
+
+ pr_info("registered panel driver(%s) to mipi-dsi driver.\n",
+ lcd_drv->name);
+
+ return 0;
+
+}
+
+struct mipi_dsim_ddi *exynos_mipi_dsi_bind_lcd_ddi(struct mipi_dsim_device *dsim,
+ const char *name)
+{
+ struct mipi_dsim_ddi *dsim_ddi, *next;
+ struct mipi_dsim_lcd_driver *lcd_drv;
+ struct mipi_dsim_lcd_device *lcd_dev;
+ int ret;
+
+ mutex_lock(&dsim->lock);
+
+ list_for_each_entry_safe(dsim_ddi, next, &dsim_ddi_list, list) {
+ lcd_drv = dsim_ddi->dsim_lcd_drv;
+ lcd_dev = dsim_ddi->dsim_lcd_dev;
+ if (!lcd_drv || !lcd_dev ||
+ (dsim->id != dsim_ddi->bus_id))
+ continue;
+
+ dev_dbg(dsim->dev, "lcd_drv->id = %d, lcd_dev->id = %d\n",
+ lcd_drv->id, lcd_dev->id);
+ dev_dbg(dsim->dev, "lcd_dev->bus_id = %d, dsim->id = %d\n",
+ lcd_dev->bus_id, dsim->id);
+
+ if ((strcmp(lcd_drv->name, name) == 0)) {
+ lcd_dev->master = dsim;
+
+ lcd_dev->dev.parent = dsim->dev;
+ dev_set_name(&lcd_dev->dev, "%s", lcd_drv->name);
+
+ ret = device_register(&lcd_dev->dev);
+ if (ret < 0) {
+ dev_err(dsim->dev,
+ "can't register %s, status %d\n",
+ dev_name(&lcd_dev->dev), ret);
+ mutex_unlock(&dsim->lock);
+
+ return NULL;
+ }
+
+ dsim->dsim_lcd_dev = lcd_dev;
+ dsim->dsim_lcd_drv = lcd_drv;
+
+ mutex_unlock(&dsim->lock);
+
+ return dsim_ddi;
+ }
+ }
+
+ mutex_unlock(&dsim->lock);
+
+ return NULL;
+}
+
+/* define MIPI-DSI Master operations. */
+static struct mipi_dsim_master_ops master_ops = {
+ .cmd_read = exynos_mipi_dsi_rd_data,
+ .cmd_write = exynos_mipi_dsi_wr_data,
+ .get_dsim_frame_done = exynos_mipi_dsi_get_frame_done_status,
+ .clear_dsim_frame_done = exynos_mipi_dsi_clear_frame_done,
+ .set_early_blank_mode = exynos_mipi_dsi_early_blank_mode,
+ .set_blank_mode = exynos_mipi_dsi_blank_mode,
+};
+
+static int exynos_mipi_dsi_probe(struct platform_device *pdev)
+{
+ struct resource *res;
+ struct mipi_dsim_device *dsim;
+ struct mipi_dsim_config *dsim_config;
+ struct mipi_dsim_platform_data *dsim_pd;
+ struct mipi_dsim_ddi *dsim_ddi;
+ int ret = -EINVAL;
+
+ dsim = kzalloc(sizeof(struct mipi_dsim_device), GFP_KERNEL);
+ if (!dsim) {
+ dev_err(&pdev->dev, "failed to allocate dsim object.\n");
+ return -ENOMEM;
+ }
+
+ dsim->pd = to_dsim_plat(pdev);
+ dsim->dev = &pdev->dev;
+ dsim->id = pdev->id;
+
+ /* get mipi_dsim_platform_data. */
+ dsim_pd = (struct mipi_dsim_platform_data *)dsim->pd;
+ if (dsim_pd == NULL) {
+ dev_err(&pdev->dev, "failed to get platform data for dsim.\n");
+ goto err_clock_get;
+ }
+ /* get mipi_dsim_config. */
+ dsim_config = dsim_pd->dsim_config;
+ if (dsim_config == NULL) {
+ dev_err(&pdev->dev, "failed to get dsim config data.\n");
+ goto err_clock_get;
+ }
+
+ dsim->dsim_config = dsim_config;
+ dsim->master_ops = &master_ops;
+
+ mutex_init(&dsim->lock);
+
+ ret = regulator_bulk_get(&pdev->dev, ARRAY_SIZE(supplies), supplies);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to get regulators: %d\n", ret);
+ goto err_clock_get;
+ }
+
+ dsim->clock = clk_get(&pdev->dev, "dsim0");
+ if (IS_ERR(dsim->clock)) {
+ dev_err(&pdev->dev, "failed to get dsim clock source\n");
+ goto err_clock_get;
+ }
+
+ clk_enable(dsim->clock);
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_err(&pdev->dev, "failed to get io memory region\n");
+ goto err_platform_get;
+ }
+
+ dsim->res = request_mem_region(res->start, resource_size(res),
+ dev_name(&pdev->dev));
+ if (!dsim->res) {
+ dev_err(&pdev->dev, "failed to request io memory region\n");
+ ret = -ENOMEM;
+ goto err_mem_region;
+ }
+
+ dsim->reg_base = ioremap(res->start, resource_size(res));
+ if (!dsim->reg_base) {
+ dev_err(&pdev->dev, "failed to remap io region\n");
+ ret = -ENOMEM;
+ goto err_ioremap;
+ }
+
+ mutex_init(&dsim->lock);
+
+ /* bind lcd ddi matched with panel name. */
+ dsim_ddi = exynos_mipi_dsi_bind_lcd_ddi(dsim, dsim_pd->lcd_panel_name);
+ if (!dsim_ddi) {
+ dev_err(&pdev->dev, "mipi_dsim_ddi object not found.\n");
+ goto err_bind;
+ }
+
+ dsim->irq = platform_get_irq(pdev, 0);
+ if (dsim->irq < 0) {
+ dev_err(&pdev->dev, "failed to request dsim irq resource\n");
+ ret = -EINVAL;
+ goto err_platform_get_irq;
+ }
+
+ ret = request_irq(dsim->irq, exynos_mipi_dsi_interrupt_handler,
+ IRQF_SHARED, pdev->name, dsim);
+ if (ret != 0) {
+ dev_err(&pdev->dev, "failed to request dsim irq\n");
+ ret = -EINVAL;
+ goto err_bind;
+ }
+
+ init_completion(&dsim_wr_comp);
+ init_completion(&dsim_rd_comp);
+
+ /* enable interrupt */
+ exynos_mipi_dsi_init_interrupt(dsim);
+
+ /* initialize mipi-dsi client(lcd panel). */
+ if (dsim_ddi->dsim_lcd_drv && dsim_ddi->dsim_lcd_drv->probe)
+ dsim_ddi->dsim_lcd_drv->probe(dsim_ddi->dsim_lcd_dev);
+
+ /* in case that mipi got enabled at bootloader. */
+ if (dsim_pd->enabled)
+ goto out;
+
+ /* lcd panel power on. */
+ if (dsim_ddi->dsim_lcd_drv && dsim_ddi->dsim_lcd_drv->power_on)
+ dsim_ddi->dsim_lcd_drv->power_on(dsim_ddi->dsim_lcd_dev, 1);
+
+ exynos_mipi_regulator_enable(dsim);
+
+ /* enable MIPI-DSI PHY. */
+ if (dsim->pd->phy_enable)
+ dsim->pd->phy_enable(pdev, true);
+
+ exynos_mipi_update_cfg(dsim);
+
+ /* set lcd panel sequence commands. */
+ if (dsim_ddi->dsim_lcd_drv && dsim_ddi->dsim_lcd_drv->set_sequence)
+ dsim_ddi->dsim_lcd_drv->set_sequence(dsim_ddi->dsim_lcd_dev);
+
+ dsim->suspended = false;
+
+out:
+ platform_set_drvdata(pdev, dsim);
+
+ dev_dbg(&pdev->dev, "mipi-dsi driver(%s mode) has been probed.\n",
+ (dsim_config->e_interface == DSIM_COMMAND) ?
+ "CPU" : "RGB");
+
+ return 0;
+
+err_bind:
+ iounmap(dsim->reg_base);
+
+err_ioremap:
+ release_mem_region(dsim->res->start, resource_size(dsim->res));
+
+err_mem_region:
+ release_resource(dsim->res);
+
+err_platform_get:
+ clk_disable(dsim->clock);
+ clk_put(dsim->clock);
+err_clock_get:
+ kfree(dsim);
+
+err_platform_get_irq:
+ return ret;
+}
+
+static int __devexit exynos_mipi_dsi_remove(struct platform_device *pdev)
+{
+ struct mipi_dsim_device *dsim = platform_get_drvdata(pdev);
+ struct mipi_dsim_ddi *dsim_ddi, *next;
+ struct mipi_dsim_lcd_driver *dsim_lcd_drv;
+
+ iounmap(dsim->reg_base);
+
+ clk_disable(dsim->clock);
+ clk_put(dsim->clock);
+
+ release_resource(dsim->res);
+ release_mem_region(dsim->res->start, resource_size(dsim->res));
+
+ list_for_each_entry_safe(dsim_ddi, next, &dsim_ddi_list, list) {
+ if (dsim_ddi) {
+ if (dsim->id != dsim_ddi->bus_id)
+ continue;
+
+ dsim_lcd_drv = dsim_ddi->dsim_lcd_drv;
+
+ if (dsim_lcd_drv->remove)
+ dsim_lcd_drv->remove(dsim_ddi->dsim_lcd_dev);
+
+ kfree(dsim_ddi);
+ }
+ }
+
+ regulator_bulk_free(ARRAY_SIZE(supplies), supplies);
+ kfree(dsim);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int exynos_mipi_dsi_suspend(struct platform_device *pdev,
+ pm_message_t state)
+{
+ struct mipi_dsim_device *dsim = platform_get_drvdata(pdev);
+ struct mipi_dsim_lcd_driver *client_drv = dsim->dsim_lcd_drv;
+ struct mipi_dsim_lcd_device *client_dev = dsim->dsim_lcd_dev;
+
+ disable_irq(dsim->irq);
+
+ if (dsim->suspended)
+ return 0;
+
+ if (client_drv && client_drv->suspend)
+ client_drv->suspend(client_dev);
+
+ /* enable MIPI-DSI PHY. */
+ if (dsim->pd->phy_enable)
+ dsim->pd->phy_enable(pdev, false);
+
+ clk_disable(dsim->clock);
+
+ exynos_mipi_regulator_disable(dsim);
+
+ dsim->suspended = true;
+
+ return 0;
+}
+
+static int exynos_mipi_dsi_resume(struct platform_device *pdev)
+{
+ struct mipi_dsim_device *dsim = platform_get_drvdata(pdev);
+ struct mipi_dsim_lcd_driver *client_drv = dsim->dsim_lcd_drv;
+ struct mipi_dsim_lcd_device *client_dev = dsim->dsim_lcd_dev;
+
+ enable_irq(dsim->irq);
+
+ if (!dsim->suspended)
+ return 0;
+
+ /* lcd panel power on. */
+ if (client_drv && client_drv->power_on)
+ client_drv->power_on(client_dev, 1);
+
+ exynos_mipi_regulator_enable(dsim);
+
+ /* enable MIPI-DSI PHY. */
+ if (dsim->pd->phy_enable)
+ dsim->pd->phy_enable(pdev, true);
+
+ clk_enable(dsim->clock);
+
+ exynos_mipi_update_cfg(dsim);
+
+ /* set lcd panel sequence commands. */
+ if (client_drv && client_drv->set_sequence)
+ client_drv->set_sequence(client_dev);
+
+ dsim->suspended = false;
+
+ return 0;
+}
+#else
+#define exynos_mipi_dsi_suspend NULL
+#define exynos_mipi_dsi_resume NULL
+#endif
+
+static struct platform_driver exynos_mipi_dsi_driver = {
+ .probe = exynos_mipi_dsi_probe,
+ .remove = __devexit_p(exynos_mipi_dsi_remove),
+ .suspend = exynos_mipi_dsi_suspend,
+ .resume = exynos_mipi_dsi_resume,
+ .driver = {
+ .name = "exynos-mipi-dsim",
+ .owner = THIS_MODULE,
+ },
+};
+
+module_platform_driver(exynos_mipi_dsi_driver);
+
+MODULE_AUTHOR("InKi Dae <inki.dae@samsung.com>");
+MODULE_DESCRIPTION("Samusung SoC MIPI-DSI driver");
+MODULE_LICENSE("GPL");