+++ /dev/null
-/* drivers/video/msm_fb/mddi_client_nt35399.c
- *
- * Support for Novatek NT35399 MDDI client of Sapphire
- *
- * Copyright (C) 2008 HTC Incorporated
- * Author: Solomon Chiu (solomon_chiu@htc.com)
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/platform_device.h>
-#include <linux/interrupt.h>
-#include <linux/sched.h>
-#include <linux/gpio.h>
-#include <linux/slab.h>
-#include <linux/platform_data/video-msm_fb.h>
-
-static DECLARE_WAIT_QUEUE_HEAD(nt35399_vsync_wait);
-
-struct panel_info {
- struct msm_mddi_client_data *client_data;
- struct platform_device pdev;
- struct msm_panel_data panel_data;
- struct msmfb_callback *fb_callback;
- struct work_struct panel_work;
- struct workqueue_struct *fb_wq;
- int nt35399_got_int;
-};
-
-static void
-nt35399_request_vsync(struct msm_panel_data *panel_data,
- struct msmfb_callback *callback)
-{
- struct panel_info *panel = container_of(panel_data, struct panel_info,
- panel_data);
- struct msm_mddi_client_data *client_data = panel->client_data;
-
- panel->fb_callback = callback;
- if (panel->nt35399_got_int) {
- panel->nt35399_got_int = 0;
- client_data->activate_link(client_data); /* clears interrupt */
- }
-}
-
-static void nt35399_wait_vsync(struct msm_panel_data *panel_data)
-{
- struct panel_info *panel = container_of(panel_data, struct panel_info,
- panel_data);
- struct msm_mddi_client_data *client_data = panel->client_data;
-
- if (panel->nt35399_got_int) {
- panel->nt35399_got_int = 0;
- client_data->activate_link(client_data); /* clears interrupt */
- }
-
- if (wait_event_timeout(nt35399_vsync_wait, panel->nt35399_got_int,
- HZ/2) == 0)
- printk(KERN_ERR "timeout waiting for VSYNC\n");
-
- panel->nt35399_got_int = 0;
- /* interrupt clears when screen dma starts */
-}
-
-static int nt35399_suspend(struct msm_panel_data *panel_data)
-{
- struct panel_info *panel = container_of(panel_data, struct panel_info,
- panel_data);
- struct msm_mddi_client_data *client_data = panel->client_data;
-
- struct msm_mddi_bridge_platform_data *bridge_data =
- client_data->private_client_data;
- int ret;
-
- ret = bridge_data->uninit(bridge_data, client_data);
- if (ret) {
- printk(KERN_INFO "mddi nt35399 client: non zero return from "
- "uninit\n");
- return ret;
- }
- client_data->suspend(client_data);
- return 0;
-}
-
-static int nt35399_resume(struct msm_panel_data *panel_data)
-{
- struct panel_info *panel = container_of(panel_data, struct panel_info,
- panel_data);
- struct msm_mddi_client_data *client_data = panel->client_data;
-
- struct msm_mddi_bridge_platform_data *bridge_data =
- client_data->private_client_data;
- int ret;
-
- client_data->resume(client_data);
- ret = bridge_data->init(bridge_data, client_data);
- if (ret)
- return ret;
- return 0;
-}
-
-static int nt35399_blank(struct msm_panel_data *panel_data)
-{
- struct panel_info *panel = container_of(panel_data, struct panel_info,
- panel_data);
- struct msm_mddi_client_data *client_data = panel->client_data;
- struct msm_mddi_bridge_platform_data *bridge_data =
- client_data->private_client_data;
-
- return bridge_data->blank(bridge_data, client_data);
-}
-
-static int nt35399_unblank(struct msm_panel_data *panel_data)
-{
- struct panel_info *panel = container_of(panel_data, struct panel_info,
- panel_data);
- struct msm_mddi_client_data *client_data = panel->client_data;
- struct msm_mddi_bridge_platform_data *bridge_data =
- client_data->private_client_data;
-
- return bridge_data->unblank(bridge_data, client_data);
-}
-
-irqreturn_t nt35399_vsync_interrupt(int irq, void *data)
-{
- struct panel_info *panel = data;
-
- panel->nt35399_got_int = 1;
-
- if (panel->fb_callback) {
- panel->fb_callback->func(panel->fb_callback);
- panel->fb_callback = NULL;
- }
-
- wake_up(&nt35399_vsync_wait);
-
- return IRQ_HANDLED;
-}
-
-static int setup_vsync(struct panel_info *panel, int init)
-{
- int ret;
- int gpio = 97;
- unsigned int irq;
-
- if (!init) {
- ret = 0;
- goto uninit;
- }
- ret = gpio_request_one(gpio, GPIOF_IN, "vsync");
- if (ret)
- goto err_request_gpio_failed;
-
- ret = irq = gpio_to_irq(gpio);
- if (ret < 0)
- goto err_get_irq_num_failed;
-
- ret = request_irq(irq, nt35399_vsync_interrupt, IRQF_TRIGGER_RISING,
- "vsync", panel);
- if (ret)
- goto err_request_irq_failed;
-
- printk(KERN_INFO "vsync on gpio %d now %d\n",
- gpio, gpio_get_value(gpio));
- return 0;
-
-uninit:
- free_irq(gpio_to_irq(gpio), panel->client_data);
-err_request_irq_failed:
-err_get_irq_num_failed:
- gpio_free(gpio);
-err_request_gpio_failed:
- return ret;
-}
-
-static int mddi_nt35399_probe(struct platform_device *pdev)
-{
- struct msm_mddi_client_data *client_data = pdev->dev.platform_data;
- struct msm_mddi_bridge_platform_data *bridge_data =
- client_data->private_client_data;
-
- int ret;
-
- struct panel_info *panel = devm_kzalloc(&pdev->dev,
- sizeof(struct panel_info),
- GFP_KERNEL);
-
- printk(KERN_DEBUG "%s: enter.\n", __func__);
-
- if (!panel)
- return -ENOMEM;
- platform_set_drvdata(pdev, panel);
-
- ret = setup_vsync(panel, 1);
- if (ret) {
- dev_err(&pdev->dev, "mddi_nt35399_setup_vsync failed\n");
- return ret;
- }
-
- panel->client_data = client_data;
- panel->panel_data.suspend = nt35399_suspend;
- panel->panel_data.resume = nt35399_resume;
- panel->panel_data.wait_vsync = nt35399_wait_vsync;
- panel->panel_data.request_vsync = nt35399_request_vsync;
- panel->panel_data.blank = nt35399_blank;
- panel->panel_data.unblank = nt35399_unblank;
- panel->panel_data.fb_data = &bridge_data->fb_data;
- panel->panel_data.caps = 0;
-
- panel->pdev.name = "msm_panel";
- panel->pdev.id = pdev->id;
- panel->pdev.resource = client_data->fb_resource;
- panel->pdev.num_resources = 1;
- panel->pdev.dev.platform_data = &panel->panel_data;
-
- if (bridge_data->init)
- bridge_data->init(bridge_data, client_data);
-
- platform_device_register(&panel->pdev);
-
- return 0;
-}
-
-static int mddi_nt35399_remove(struct platform_device *pdev)
-{
- struct panel_info *panel = platform_get_drvdata(pdev);
-
- setup_vsync(panel, 0);
- return 0;
-}
-
-static struct platform_driver mddi_client_0bda_8a47 = {
- .probe = mddi_nt35399_probe,
- .remove = mddi_nt35399_remove,
- .driver = { .name = "mddi_c_0bda_8a47" },
-};
-
-static int __init mddi_client_nt35399_init(void)
-{
- return platform_driver_register(&mddi_client_0bda_8a47);
-}
-
-module_init(mddi_client_nt35399_init);
-
Code Review / kvmfornfv.git / blobdiff