384 lines
9.1 KiB
C
384 lines
9.1 KiB
C
/* Copyright (c) 2010-2012, The Linux Foundation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/time.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/spinlock.h>
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#include <linux/delay.h>
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#include <linux/io.h>
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#include <linux/semaphore.h>
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#include <linux/uaccess.h>
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#include <linux/clk.h>
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#include <linux/platform_device.h>
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#include <asm/system.h>
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#include <asm/mach-types.h>
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#include <mach/hardware.h>
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#include <linux/pm_runtime.h>
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#include <mach/clk.h>
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#include "msm_fb.h"
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#include "mdp4.h"
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static int dtv_probe(struct platform_device *pdev);
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static int dtv_remove(struct platform_device *pdev);
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static int dtv_off(struct platform_device *pdev);
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static int dtv_on(struct platform_device *pdev);
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static int dtv_off_sub(void);
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static struct platform_device *pdev_list[MSM_FB_MAX_DEV_LIST];
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static int pdev_list_cnt;
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static struct clk *tv_src_clk;
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static struct clk *hdmi_clk;
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static struct clk *mdp_tv_clk;
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static struct platform_device *dtv_pdev;
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static struct workqueue_struct *dtv_work_queue;
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static struct work_struct dtv_off_work;
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static int mdp4_dtv_runtime_suspend(struct device *dev)
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{
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dev_dbg(dev, "pm_runtime: suspending...\n");
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return 0;
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}
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static int mdp4_dtv_runtime_resume(struct device *dev)
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{
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dev_dbg(dev, "pm_runtime: resuming...\n");
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return 0;
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}
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static const struct dev_pm_ops mdp4_dtv_dev_pm_ops = {
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.runtime_suspend = mdp4_dtv_runtime_suspend,
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.runtime_resume = mdp4_dtv_runtime_resume,
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};
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static struct platform_driver dtv_driver = {
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.probe = dtv_probe,
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.remove = dtv_remove,
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.suspend = NULL,
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.resume = NULL,
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.shutdown = NULL,
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.driver = {
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.name = "dtv",
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.pm = &mdp4_dtv_dev_pm_ops,
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},
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};
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static struct lcdc_platform_data *dtv_pdata;
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#ifdef CONFIG_MSM_BUS_SCALING
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static uint32_t dtv_bus_scale_handle;
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#else
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static struct clk *ebi1_clk;
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#endif
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static int dtv_off(struct platform_device *pdev)
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{
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int ret = 0;
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struct msm_fb_data_type *mfd = NULL;
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if (!pdev) {
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pr_err("%s: FAILED: invalid arg\n", __func__);
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return -EINVAL;
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}
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mfd = platform_get_drvdata(pdev);
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if (!mfd) {
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pr_err("%s: FAILED: invalid mfd\n", __func__);
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return -EINVAL;
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}
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dtv_pdev = pdev;
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/*
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* If it's a suspend operation then handle the device
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* power down synchronously.
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* Otherwise, queue work item to handle power down sequence.
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* This is needed since we need to wait for the audio engine
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* to shutdown first before we turn off the DTV device.
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*/
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if (!mfd->suspend.op_suspend) {
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pr_debug("%s: Queuing work to turn off HDMI core\n", __func__);
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queue_work(dtv_work_queue, &dtv_off_work);
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} else {
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pr_debug("%s: turning off HDMI core\n", __func__);
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ret = dtv_off_sub();
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}
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return ret;
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}
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static int dtv_off_sub(void)
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{
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int ret = 0;
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if (!dtv_pdev) {
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pr_err("%s: FAILED: invalid arg\n", __func__);
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return -EINVAL;
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}
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ret = panel_next_off(dtv_pdev);
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pr_info("%s\n", __func__);
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clk_disable_unprepare(hdmi_clk);
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if (mdp_tv_clk)
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clk_disable_unprepare(mdp_tv_clk);
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if (dtv_pdata && dtv_pdata->lcdc_power_save)
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dtv_pdata->lcdc_power_save(0);
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if (dtv_pdata && dtv_pdata->lcdc_gpio_config)
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ret = dtv_pdata->lcdc_gpio_config(0);
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#ifdef CONFIG_MSM_BUS_SCALING
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if (dtv_bus_scale_handle > 0)
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msm_bus_scale_client_update_request(dtv_bus_scale_handle,
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0);
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#else
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if (ebi1_clk)
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clk_disable_unprepare(ebi1_clk);
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#endif
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mdp4_extn_disp = 0;
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return ret;
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}
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static void dtv_off_work_func(struct work_struct *work)
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{
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dtv_off_sub();
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}
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static int dtv_on(struct platform_device *pdev)
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{
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int ret = 0;
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struct msm_fb_data_type *mfd;
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unsigned long panel_pixclock_freq , pm_qos_rate;
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/* If a power down is already underway, wait for it to finish */
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flush_work_sync(&dtv_off_work);
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mfd = platform_get_drvdata(pdev);
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panel_pixclock_freq = mfd->fbi->var.pixclock;
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if (panel_pixclock_freq > 58000000)
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/* pm_qos_rate should be in Khz */
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pm_qos_rate = panel_pixclock_freq / 1000 ;
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else
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pm_qos_rate = 58000;
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mdp4_extn_disp = 1;
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#ifdef CONFIG_MSM_BUS_SCALING
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if (dtv_bus_scale_handle > 0)
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msm_bus_scale_client_update_request(dtv_bus_scale_handle,
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1);
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#else
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if (ebi1_clk) {
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clk_set_rate(ebi1_clk, pm_qos_rate * 1000);
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clk_prepare_enable(ebi1_clk);
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}
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#endif
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if (dtv_pdata && dtv_pdata->lcdc_power_save)
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dtv_pdata->lcdc_power_save(1);
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if (dtv_pdata && dtv_pdata->lcdc_gpio_config)
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ret = dtv_pdata->lcdc_gpio_config(1);
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mfd = platform_get_drvdata(pdev);
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ret = clk_set_rate(tv_src_clk, mfd->fbi->var.pixclock);
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if (ret) {
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pr_info("%s: clk_set_rate(%d) failed\n", __func__,
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mfd->fbi->var.pixclock);
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if (mfd->fbi->var.pixclock == 27030000)
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mfd->fbi->var.pixclock = 27000000;
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ret = clk_set_rate(tv_src_clk, mfd->fbi->var.pixclock);
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}
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pr_info("%s: tv_src_clk=%dkHz, pm_qos_rate=%ldkHz, [%d]\n", __func__,
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mfd->fbi->var.pixclock/1000, pm_qos_rate, ret);
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mfd->panel_info.clk_rate = mfd->fbi->var.pixclock;
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clk_prepare_enable(hdmi_clk);
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clk_reset(hdmi_clk, CLK_RESET_ASSERT);
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udelay(20);
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clk_reset(hdmi_clk, CLK_RESET_DEASSERT);
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if (mdp_tv_clk)
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clk_prepare_enable(mdp_tv_clk);
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ret = panel_next_on(pdev);
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return ret;
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}
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static int dtv_probe(struct platform_device *pdev)
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{
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struct msm_fb_data_type *mfd;
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struct fb_info *fbi;
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struct platform_device *mdp_dev = NULL;
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struct msm_fb_panel_data *pdata = NULL;
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int rc;
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if (pdev->id == 0) {
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dtv_pdata = pdev->dev.platform_data;
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#ifdef CONFIG_MSM_BUS_SCALING
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if (!dtv_bus_scale_handle && dtv_pdata &&
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dtv_pdata->bus_scale_table) {
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dtv_bus_scale_handle =
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msm_bus_scale_register_client(
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dtv_pdata->bus_scale_table);
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if (!dtv_bus_scale_handle) {
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pr_err("%s not able to get bus scale\n",
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__func__);
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}
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}
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#else
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ebi1_clk = clk_get(&pdev->dev, "mem_clk");
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if (IS_ERR(ebi1_clk)) {
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ebi1_clk = NULL;
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pr_warning("%s: Couldn't get ebi1 clock\n", __func__);
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}
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#endif
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tv_src_clk = clk_get(&pdev->dev, "src_clk");
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if (IS_ERR(tv_src_clk)) {
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pr_err("error: can't get tv_src_clk!\n");
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return IS_ERR(tv_src_clk);
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}
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hdmi_clk = clk_get(&pdev->dev, "hdmi_clk");
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if (IS_ERR(hdmi_clk)) {
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pr_err("error: can't get hdmi_clk!\n");
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return IS_ERR(hdmi_clk);
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}
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mdp_tv_clk = clk_get(&pdev->dev, "mdp_clk");
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if (IS_ERR(mdp_tv_clk))
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mdp_tv_clk = NULL;
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return 0;
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}
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dtv_work_queue = create_singlethread_workqueue("dtv_work");
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INIT_WORK(&dtv_off_work, dtv_off_work_func);
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mfd = platform_get_drvdata(pdev);
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if (!mfd)
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return -ENODEV;
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if (mfd->key != MFD_KEY)
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return -EINVAL;
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if (pdev_list_cnt >= MSM_FB_MAX_DEV_LIST)
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return -ENOMEM;
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mdp_dev = platform_device_alloc("mdp", pdev->id);
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if (!mdp_dev)
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return -ENOMEM;
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/*
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* link to the latest pdev
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*/
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mfd->pdev = mdp_dev;
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mfd->dest = DISPLAY_LCDC;
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/*
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* alloc panel device data
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*/
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if (platform_device_add_data
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(mdp_dev, pdev->dev.platform_data,
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sizeof(struct msm_fb_panel_data))) {
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pr_err("dtv_probe: platform_device_add_data failed!\n");
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platform_device_put(mdp_dev);
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return -ENOMEM;
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}
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/*
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* data chain
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*/
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pdata = (struct msm_fb_panel_data *)mdp_dev->dev.platform_data;
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pdata->on = dtv_on;
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pdata->off = dtv_off;
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pdata->next = pdev;
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/*
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* get/set panel specific fb info
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*/
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mfd->panel_info = pdata->panel_info;
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if (hdmi_prim_display)
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mfd->fb_imgType = MSMFB_DEFAULT_TYPE;
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else
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mfd->fb_imgType = MDP_RGB_565;
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fbi = mfd->fbi;
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fbi->var.pixclock = mfd->panel_info.clk_rate;
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fbi->var.left_margin = mfd->panel_info.lcdc.h_back_porch;
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fbi->var.right_margin = mfd->panel_info.lcdc.h_front_porch;
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fbi->var.upper_margin = mfd->panel_info.lcdc.v_back_porch;
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fbi->var.lower_margin = mfd->panel_info.lcdc.v_front_porch;
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fbi->var.hsync_len = mfd->panel_info.lcdc.h_pulse_width;
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fbi->var.vsync_len = mfd->panel_info.lcdc.v_pulse_width;
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/*
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* set driver data
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*/
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platform_set_drvdata(mdp_dev, mfd);
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/*
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* register in mdp driver
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*/
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rc = platform_device_add(mdp_dev);
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if (rc)
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goto dtv_probe_err;
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pm_runtime_set_active(&pdev->dev);
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pm_runtime_enable(&pdev->dev);
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pdev_list[pdev_list_cnt++] = pdev;
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return 0;
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dtv_probe_err:
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#ifdef CONFIG_MSM_BUS_SCALING
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if (dtv_pdata && dtv_pdata->bus_scale_table &&
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dtv_bus_scale_handle > 0)
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msm_bus_scale_unregister_client(dtv_bus_scale_handle);
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#endif
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platform_device_put(mdp_dev);
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return rc;
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}
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static int dtv_remove(struct platform_device *pdev)
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{
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if (dtv_work_queue)
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destroy_workqueue(dtv_work_queue);
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#ifdef CONFIG_MSM_BUS_SCALING
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if (dtv_pdata && dtv_pdata->bus_scale_table &&
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dtv_bus_scale_handle > 0)
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msm_bus_scale_unregister_client(dtv_bus_scale_handle);
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#else
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if (ebi1_clk)
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clk_put(ebi1_clk);
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#endif
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pm_runtime_disable(&pdev->dev);
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return 0;
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}
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static int dtv_register_driver(void)
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{
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return platform_driver_register(&dtv_driver);
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}
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static int __init dtv_driver_init(void)
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{
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return dtv_register_driver();
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}
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module_init(dtv_driver_init);
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