drivers/video/msm/tvenc.c - kernel/msm - Git at Google

 /* Copyright (c) 2008-2012, The Linux Foundation. All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 and
  * only version 2 as published by the Free Software Foundation.
  *
  * 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/sched.h>
 #include <linux/time.h>
 #include <linux/init.h>
 #include <linux/interrupt.h>
 #include <linux/spinlock.h>
 #include <linux/delay.h>
 #include <mach/hardware.h>
 #include <linux/io.h>
 #include <linux/pm_runtime.h>

 #include <asm/system.h>
 #include <asm/mach-types.h>
 #include <linux/semaphore.h>
 #include <linux/uaccess.h>
 #include <linux/clk.h>
 #include <linux/platform_device.h>

 #define TVENC_C
 #include "tvenc.h"
 #include "msm_fb.h"
 #include "mdp4.h"
 /* AXI rate in KHz */
 #define MSM_SYSTEM_BUS_RATE	128000000

 static int tvenc_probe(struct platform_device *pdev);
 static int tvenc_remove(struct platform_device *pdev);

 static int tvenc_off(struct platform_device *pdev);
 static int tvenc_on(struct platform_device *pdev);

 static struct platform_device *pdev_list[MSM_FB_MAX_DEV_LIST];
 static int pdev_list_cnt;

 static struct clk *tvenc_clk;
 static struct clk *tvdac_clk;
 static struct clk *tvenc_pclk;
 static struct clk *mdp_tv_clk;
 #ifdef CONFIG_FB_MSM_MDP40
 static struct clk *tv_src_clk;
 #endif

 #ifdef CONFIG_MSM_BUS_SCALING
 static uint32_t tvenc_bus_scale_handle;
 #endif

 static int tvenc_runtime_suspend(struct device *dev)
 {
 	dev_dbg(dev, "pm_runtime: suspending...\n");
 	return 0;
 }

 static int tvenc_runtime_resume(struct device *dev)
 {
 	dev_dbg(dev, "pm_runtime: resuming...\n");
 	return 0;
 }

 static struct dev_pm_ops tvenc_dev_pm_ops = {
 	.runtime_suspend = tvenc_runtime_suspend,
 	.runtime_resume = tvenc_runtime_resume,
 };

 static struct platform_driver tvenc_driver = {
 	.probe = tvenc_probe,
 	.remove = tvenc_remove,
 	.suspend = NULL,
 	.resume = NULL,
 	.shutdown = NULL,
 	.driver = {
 		   .name = "tvenc",
 		   .pm = &tvenc_dev_pm_ops
 		   },
 };

 int tvenc_set_encoder_clock(boolean clock_on)
 {
 	int ret = 0;
 	if (clock_on) {
 #ifdef CONFIG_FB_MSM_MDP40
 		/* Consolidated clock used by both HDMI & TV encoder.
 		Clock exists only in MDP4 and not in older versions */
 		ret = clk_set_rate(tv_src_clk, 27000000);
 		if (ret) {
 			pr_err("%s: tvsrc_clk set rate failed! %d\n",
 				__func__, ret);
 			goto tvsrc_err;
 		}
 #endif
 		ret = clk_prepare_enable(tvenc_clk);
 		if (ret) {
 			pr_err("%s: tvenc_clk enable failed! %d\n",
 				__func__, ret);
 			goto tvsrc_err;
 		}

 		if (!IS_ERR(tvenc_pclk)) {
 			ret = clk_prepare_enable(tvenc_pclk);
 			if (ret) {
 				pr_err("%s: tvenc_pclk enable failed! %d\n",
 					__func__, ret);
 				goto tvencp_err;
 			}
 		}
 		return ret;
 	} else {
 		if (!IS_ERR(tvenc_pclk))
 			clk_disable_unprepare(tvenc_pclk);
 		clk_disable_unprepare(tvenc_clk);
 		return ret;
 	}
 tvencp_err:
 	clk_disable_unprepare(tvenc_clk);
 tvsrc_err:
 	return ret;
 }

 int tvenc_set_clock(boolean clock_on)
 {
 	int ret = 0;
 	if (clock_on) {
 		if (tvenc_pdata->poll) {
 			ret = tvenc_set_encoder_clock(CLOCK_ON);
 			if (ret) {
 				pr_err("%s: TVenc clock(s) enable failed! %d\n",
 					__func__, ret);
 				goto tvenc_err;
 			}
 		}
 		ret = clk_prepare_enable(tvdac_clk);
 		if (ret) {
 			pr_err("%s: tvdac_clk enable failed! %d\n",
 				__func__, ret);
 			goto tvdac_err;
 		}
 		if (!IS_ERR(mdp_tv_clk)) {
 			ret = clk_prepare_enable(mdp_tv_clk);
 			if (ret) {
 				pr_err("%s: mdp_tv_clk enable failed! %d\n",
 					__func__, ret);
 				goto mdptv_err;
 			}
 		}
 		return ret;
 	} else {
 		if (!IS_ERR(mdp_tv_clk))
 			clk_disable_unprepare(mdp_tv_clk);
 		clk_disable_unprepare(tvdac_clk);
 		if (tvenc_pdata->poll)
 			tvenc_set_encoder_clock(CLOCK_OFF);
 		return ret;
 	}

 mdptv_err:
 	clk_disable_unprepare(tvdac_clk);
 tvdac_err:
 	tvenc_set_encoder_clock(CLOCK_OFF);
 tvenc_err:
 	return ret;
 }

 static int tvenc_off(struct platform_device *pdev)
 {
 	int ret = 0;

 	struct msm_fb_data_type *mfd;

 	mfd = platform_get_drvdata(pdev);

 	ret = panel_next_off(pdev);
 	if (ret)
 		pr_err("%s: tvout_off failed! %d\n",
 		__func__, ret);

 	tvenc_set_clock(CLOCK_OFF);

 	if (tvenc_pdata && tvenc_pdata->pm_vid_en)
 		ret = tvenc_pdata->pm_vid_en(0);
 #ifdef CONFIG_MSM_BUS_SCALING
 	if (tvenc_bus_scale_handle > 0)
 		msm_bus_scale_client_update_request(tvenc_bus_scale_handle,
 							0);
 #else
 	if (mfd->ebi1_clk)
 		clk_disable_unprepare(mfd->ebi1_clk);
 #endif

 	if (ret)
 		pr_err("%s: pm_vid_en(off) failed! %d\n",
 		__func__, ret);
 	mdp4_extn_disp = 0;
 	return ret;
 }

 static int tvenc_on(struct platform_device *pdev)
 {
 	int ret = 0;

 #ifndef CONFIG_MSM_BUS_SCALING
 	struct msm_fb_data_type *mfd = platform_get_drvdata(pdev);
 #endif

 #ifdef CONFIG_MSM_BUS_SCALING
 	if (tvenc_bus_scale_handle > 0)
 		msm_bus_scale_client_update_request(tvenc_bus_scale_handle,
 							1);
 #else
 	if (mfd->ebi1_clk)
 		clk_prepare_enable(mfd->ebi1_clk);
 #endif
 	mdp4_extn_disp = 1;
 	if (tvenc_pdata && tvenc_pdata->pm_vid_en)
 		ret = tvenc_pdata->pm_vid_en(1);
 	if (ret) {
 		pr_err("%s: pm_vid_en(on) failed! %d\n",
 		__func__, ret);
 		return ret;
 	}

 	ret = tvenc_set_clock(CLOCK_ON);
 	if (ret) {
 		pr_err("%s: tvenc_set_clock(CLOCK_ON) failed! %d\n",
 		__func__, ret);
 		tvenc_pdata->pm_vid_en(0);
 		goto error;
 	}

 	ret = panel_next_on(pdev);
 	if (ret) {
 		pr_err("%s: tvout_on failed! %d\n",
 		__func__, ret);
 		tvenc_set_clock(CLOCK_OFF);
 		tvenc_pdata->pm_vid_en(0);
 	}

 error:
 	return ret;

 }

 void tvenc_gen_test_pattern(struct msm_fb_data_type *mfd)
 {
 	uint32 reg = 0, i;

 	reg = readl(MSM_TV_ENC_CTL);
 	reg |= TVENC_CTL_TEST_PATT_EN;

 	for (i = 0; i < 3; i++) {
 		TV_OUT(TV_ENC_CTL, 0);	/* disable TV encoder */

 		switch (i) {
 			/*
 			 * TV Encoder - Color Bar Test Pattern
 			 */
 		case 0:
 			reg |= TVENC_CTL_TPG_CLRBAR;
 			break;
 			/*
 			 * TV Encoder - Red Frame Test Pattern
 			 */
 		case 1:
 			reg |= TVENC_CTL_TPG_REDCLR;
 			break;
 			/*
 			 * TV Encoder - Modulated Ramp Test Pattern
 			 */
 		default:
 			reg |= TVENC_CTL_TPG_MODRAMP;
 			break;
 		}

 		TV_OUT(TV_ENC_CTL, reg);
 		mdelay(5000);

 		switch (i) {
 			/*
 			 * TV Encoder - Color Bar Test Pattern
 			 */
 		case 0:
 			reg &= ~TVENC_CTL_TPG_CLRBAR;
 			break;
 			/*
 			 * TV Encoder - Red Frame Test Pattern
 			 */
 		case 1:
 			reg &= ~TVENC_CTL_TPG_REDCLR;
 			break;
 			/*
 			 * TV Encoder - Modulated Ramp Test Pattern
 			 */
 		default:
 			reg &= ~TVENC_CTL_TPG_MODRAMP;
 			break;
 		}
 	}
 }

 static int tvenc_resource_initialized;

 static int tvenc_probe(struct platform_device *pdev)
 {
 	struct msm_fb_data_type *mfd;
 	struct platform_device *mdp_dev = NULL;
 	struct msm_fb_panel_data *pdata = NULL;
 	int rc, ret;
 	struct clk *ebi1_clk = NULL;

 	if (pdev->id == 0) {
 		tvenc_base = ioremap(pdev->resource[0].start,
 					pdev->resource[0].end -
 					pdev->resource[0].start + 1);
 		if (!tvenc_base) {
 			pr_err("tvenc_base ioremap failed!\n");
 			return -ENOMEM;
 		}

 		tvenc_clk = clk_get(&pdev->dev, "enc_clk");
 		tvdac_clk = clk_get(&pdev->dev, "dac_clk");
 		tvenc_pclk = clk_get(&pdev->dev, "iface_clk");
 		mdp_tv_clk = clk_get(&pdev->dev, "mdp_clk");

 #ifndef CONFIG_MSM_BUS_SCALING
 		ebi1_clk = clk_get(&pdev->dev, "mem_clk");
 		if (IS_ERR(ebi1_clk)) {
 			rc = PTR_ERR(ebi1_clk);
 			goto tvenc_probe_err;
 		}
 		clk_set_rate(ebi1_clk, MSM_SYSTEM_BUS_RATE);
 #endif

 #ifdef CONFIG_FB_MSM_MDP40
 		tv_src_clk = clk_get(&pdev->dev, "src_clk");
 		if (IS_ERR(tv_src_clk))
 			tv_src_clk = tvenc_clk; /* Fallback to slave */
 #endif

 		if (IS_ERR(tvenc_clk)) {
 			pr_err("%s: error: can't get tvenc_clk!\n", __func__);
 			return PTR_ERR(tvenc_clk);
 		}

 		if (IS_ERR(tvdac_clk)) {
 			pr_err("%s: error: can't get tvdac_clk!\n", __func__);
 			return PTR_ERR(tvdac_clk);
 		}

 		if (IS_ERR(tvenc_pclk)) {
 			ret = PTR_ERR(tvenc_pclk);
 			if (-ENOENT == ret)
 				pr_info("%s: tvenc_pclk does not exist!\n",
 								__func__);
 			else {
 				pr_err("%s: error: can't get tvenc_pclk!\n",
 								__func__);
 				return ret;
 			}
 		}

 		if (IS_ERR(mdp_tv_clk)) {
 			ret = PTR_ERR(mdp_tv_clk);
 			if (-ENOENT == ret)
 				pr_info("%s: mdp_tv_clk does not exist!\n",
 								__func__);
 			else {
 				pr_err("%s: error: can't get mdp_tv_clk!\n",
 								__func__);
 				return ret;
 			}
 		}

 		tvenc_pdata = pdev->dev.platform_data;
 		tvenc_resource_initialized = 1;
 		return 0;
 	}

 	if (!tvenc_resource_initialized)
 		return -EPERM;

 	mfd = platform_get_drvdata(pdev);
 	mfd->ebi1_clk = ebi1_clk;

 	if (!mfd)
 		return -ENODEV;

 	if (mfd->key != MFD_KEY)
 		return -EINVAL;

 	if (pdev_list_cnt >= MSM_FB_MAX_DEV_LIST)
 		return -ENOMEM;

 	if (tvenc_base == NULL)
 		return -ENOMEM;

 	mdp_dev = platform_device_alloc("mdp", pdev->id);
 	if (!mdp_dev)
 		return -ENOMEM;

 	/*
 	 * link to the latest pdev
 	 */
 	mfd->pdev = mdp_dev;
 	mfd->dest = DISPLAY_TV;

 	/*
 	 * alloc panel device data
 	 */
 	if (platform_device_add_data
 	    (mdp_dev, pdev->dev.platform_data,
 	     sizeof(struct msm_fb_panel_data))) {
 		pr_err("tvenc_probe: platform_device_add_data failed!\n");
 		platform_device_put(mdp_dev);
 		return -ENOMEM;
 	}
 	/*
 	 * data chain
 	 */
 	pdata = mdp_dev->dev.platform_data;
 	pdata->on = tvenc_on;
 	pdata->off = tvenc_off;
 	pdata->next = pdev;

 	/*
 	 * get/set panel specific fb info
 	 */
 	mfd->panel_info = pdata->panel_info;
 #ifdef CONFIG_FB_MSM_MDP40
 	mfd->fb_imgType = MDP_RGB_565;  /* base layer */
 #else
 	mfd->fb_imgType = MDP_YCRYCB_H2V1;
 #endif

 #ifdef CONFIG_MSM_BUS_SCALING
 	if (!tvenc_bus_scale_handle && tvenc_pdata &&
 		tvenc_pdata->bus_scale_table) {
 		tvenc_bus_scale_handle =
 			msm_bus_scale_register_client(
 				tvenc_pdata->bus_scale_table);
 		if (!tvenc_bus_scale_handle) {
 			printk(KERN_ERR "%s not able to get bus scale\n",
 				__func__);
 		}
 	}
 #endif

 	/*
 	 * set driver data
 	 */
 	platform_set_drvdata(mdp_dev, mfd);

 	/*
 	 * register in mdp driver
 	 */
 	rc = platform_device_add(mdp_dev);
 	if (rc)
 		goto tvenc_probe_err;

 	pm_runtime_set_active(&pdev->dev);
 	pm_runtime_enable(&pdev->dev);


 	pdev_list[pdev_list_cnt++] = pdev;

 	return 0;

 tvenc_probe_err:
 #ifdef CONFIG_MSM_BUS_SCALING
 	if (tvenc_pdata && tvenc_pdata->bus_scale_table &&
 		tvenc_bus_scale_handle > 0) {
 		msm_bus_scale_unregister_client(tvenc_bus_scale_handle);
 		tvenc_bus_scale_handle = 0;
 	}
 #endif
 	platform_device_put(mdp_dev);
 	return rc;
 }

 static int tvenc_remove(struct platform_device *pdev)
 {
 	struct msm_fb_data_type *mfd;

 	mfd = platform_get_drvdata(pdev);

 #ifdef CONFIG_MSM_BUS_SCALING
 	if (tvenc_pdata && tvenc_pdata->bus_scale_table &&
 		tvenc_bus_scale_handle > 0) {
 		msm_bus_scale_unregister_client(tvenc_bus_scale_handle);
 		tvenc_bus_scale_handle = 0;
 	}
 #else
 	clk_put(mfd->ebi1_clk);
 #endif

 	pm_runtime_disable(&pdev->dev);
 	return 0;
 }

 static int tvenc_register_driver(void)
 {
 	return platform_driver_register(&tvenc_driver);
 }

 static int __init tvenc_driver_init(void)
 {
 	return tvenc_register_driver();
 }

 module_init(tvenc_driver_init);
	/* Copyright (c) 2008-2012, The Linux Foundation. All rights reserved.
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License version 2 and
	* only version 2 as published by the Free Software Foundation.
	*
	* 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/sched.h>
	#include <linux/time.h>
	#include <linux/init.h>
	#include <linux/interrupt.h>
	#include <linux/spinlock.h>
	#include <linux/delay.h>
	#include <mach/hardware.h>
	#include <linux/io.h>
	#include <linux/pm_runtime.h>

	#include <asm/system.h>
	#include <asm/mach-types.h>
	#include <linux/semaphore.h>
	#include <linux/uaccess.h>
	#include <linux/clk.h>
	#include <linux/platform_device.h>

	#define TVENC_C
	#include "tvenc.h"
	#include "msm_fb.h"
	#include "mdp4.h"
	/* AXI rate in KHz */
	#define MSM_SYSTEM_BUS_RATE 128000000

	static int tvenc_probe(struct platform_device *pdev);
	static int tvenc_remove(struct platform_device *pdev);

	static int tvenc_off(struct platform_device *pdev);
	static int tvenc_on(struct platform_device *pdev);

	static struct platform_device *pdev_list[MSM_FB_MAX_DEV_LIST];
	static int pdev_list_cnt;

	static struct clk *tvenc_clk;
	static struct clk *tvdac_clk;
	static struct clk *tvenc_pclk;
	static struct clk *mdp_tv_clk;
	#ifdef CONFIG_FB_MSM_MDP40
	static struct clk *tv_src_clk;
	#endif

	#ifdef CONFIG_MSM_BUS_SCALING
	static uint32_t tvenc_bus_scale_handle;
	#endif

	static int tvenc_runtime_suspend(struct device *dev)
	{
	dev_dbg(dev, "pm_runtime: suspending...\n");
	return 0;
	}

	static int tvenc_runtime_resume(struct device *dev)
	{
	dev_dbg(dev, "pm_runtime: resuming...\n");
	return 0;
	}

	static struct dev_pm_ops tvenc_dev_pm_ops = {
	.runtime_suspend = tvenc_runtime_suspend,
	.runtime_resume = tvenc_runtime_resume,
	};

	static struct platform_driver tvenc_driver = {
	.probe = tvenc_probe,
	.remove = tvenc_remove,
	.suspend = NULL,
	.resume = NULL,
	.shutdown = NULL,
	.driver = {
	.name = "tvenc",
	.pm = &tvenc_dev_pm_ops
	},
	};

	int tvenc_set_encoder_clock(boolean clock_on)
	{
	int ret = 0;
	if (clock_on) {
	#ifdef CONFIG_FB_MSM_MDP40
	/* Consolidated clock used by both HDMI & TV encoder.
	Clock exists only in MDP4 and not in older versions */
	ret = clk_set_rate(tv_src_clk, 27000000);
	if (ret) {
	pr_err("%s: tvsrc_clk set rate failed! %d\n",
	__func__, ret);
	goto tvsrc_err;
	}
	#endif
	ret = clk_prepare_enable(tvenc_clk);
	if (ret) {
	pr_err("%s: tvenc_clk enable failed! %d\n",
	__func__, ret);
	goto tvsrc_err;
	}

	if (!IS_ERR(tvenc_pclk)) {
	ret = clk_prepare_enable(tvenc_pclk);
	if (ret) {
	pr_err("%s: tvenc_pclk enable failed! %d\n",
	__func__, ret);
	goto tvencp_err;
	}
	}
	return ret;
	} else {
	if (!IS_ERR(tvenc_pclk))
	clk_disable_unprepare(tvenc_pclk);
	clk_disable_unprepare(tvenc_clk);
	return ret;
	}
	tvencp_err:
	clk_disable_unprepare(tvenc_clk);
	tvsrc_err:
	return ret;
	}

	int tvenc_set_clock(boolean clock_on)
	{
	int ret = 0;
	if (clock_on) {
	if (tvenc_pdata->poll) {
	ret = tvenc_set_encoder_clock(CLOCK_ON);
	if (ret) {
	pr_err("%s: TVenc clock(s) enable failed! %d\n",
	__func__, ret);
	goto tvenc_err;
	}
	}
	ret = clk_prepare_enable(tvdac_clk);
	if (ret) {
	pr_err("%s: tvdac_clk enable failed! %d\n",
	__func__, ret);
	goto tvdac_err;
	}
	if (!IS_ERR(mdp_tv_clk)) {
	ret = clk_prepare_enable(mdp_tv_clk);
	if (ret) {
	pr_err("%s: mdp_tv_clk enable failed! %d\n",
	__func__, ret);
	goto mdptv_err;
	}
	}
	return ret;
	} else {
	if (!IS_ERR(mdp_tv_clk))
	clk_disable_unprepare(mdp_tv_clk);
	clk_disable_unprepare(tvdac_clk);
	if (tvenc_pdata->poll)
	tvenc_set_encoder_clock(CLOCK_OFF);
	return ret;
	}

	mdptv_err:
	clk_disable_unprepare(tvdac_clk);
	tvdac_err:
	tvenc_set_encoder_clock(CLOCK_OFF);
	tvenc_err:
	return ret;
	}

	static int tvenc_off(struct platform_device *pdev)
	{
	int ret = 0;

	struct msm_fb_data_type *mfd;

	mfd = platform_get_drvdata(pdev);

	ret = panel_next_off(pdev);
	if (ret)
	pr_err("%s: tvout_off failed! %d\n",
	__func__, ret);

	tvenc_set_clock(CLOCK_OFF);

	if (tvenc_pdata && tvenc_pdata->pm_vid_en)
	ret = tvenc_pdata->pm_vid_en(0);
	#ifdef CONFIG_MSM_BUS_SCALING
	if (tvenc_bus_scale_handle > 0)
	msm_bus_scale_client_update_request(tvenc_bus_scale_handle,
	0);
	#else
	if (mfd->ebi1_clk)
	clk_disable_unprepare(mfd->ebi1_clk);
	#endif

	if (ret)
	pr_err("%s: pm_vid_en(off) failed! %d\n",
	__func__, ret);
	mdp4_extn_disp = 0;
	return ret;
	}

	static int tvenc_on(struct platform_device *pdev)
	{
	int ret = 0;

	#ifndef CONFIG_MSM_BUS_SCALING
	struct msm_fb_data_type *mfd = platform_get_drvdata(pdev);
	#endif

	#ifdef CONFIG_MSM_BUS_SCALING
	if (tvenc_bus_scale_handle > 0)
	msm_bus_scale_client_update_request(tvenc_bus_scale_handle,
	1);
	#else
	if (mfd->ebi1_clk)
	clk_prepare_enable(mfd->ebi1_clk);
	#endif
	mdp4_extn_disp = 1;
	if (tvenc_pdata && tvenc_pdata->pm_vid_en)
	ret = tvenc_pdata->pm_vid_en(1);
	if (ret) {
	pr_err("%s: pm_vid_en(on) failed! %d\n",
	__func__, ret);
	return ret;
	}

	ret = tvenc_set_clock(CLOCK_ON);
	if (ret) {
	pr_err("%s: tvenc_set_clock(CLOCK_ON) failed! %d\n",
	__func__, ret);
	tvenc_pdata->pm_vid_en(0);
	goto error;
	}

	ret = panel_next_on(pdev);
	if (ret) {
	pr_err("%s: tvout_on failed! %d\n",
	__func__, ret);
	tvenc_set_clock(CLOCK_OFF);
	tvenc_pdata->pm_vid_en(0);
	}

	error:
	return ret;

	}

	void tvenc_gen_test_pattern(struct msm_fb_data_type *mfd)
	{
	uint32 reg = 0, i;

	reg = readl(MSM_TV_ENC_CTL);
	reg \|= TVENC_CTL_TEST_PATT_EN;

	for (i = 0; i < 3; i++) {
	TV_OUT(TV_ENC_CTL, 0); /* disable TV encoder */

	switch (i) {
	/*
	* TV Encoder - Color Bar Test Pattern
	*/
	case 0:
	reg \|= TVENC_CTL_TPG_CLRBAR;
	break;
	/*
	* TV Encoder - Red Frame Test Pattern
	*/
	case 1:
	reg \|= TVENC_CTL_TPG_REDCLR;
	break;
	/*
	* TV Encoder - Modulated Ramp Test Pattern
	*/
	default:
	reg \|= TVENC_CTL_TPG_MODRAMP;
	break;
	}

	TV_OUT(TV_ENC_CTL, reg);
	mdelay(5000);

	switch (i) {
	/*
	* TV Encoder - Color Bar Test Pattern
	*/
	case 0:
	reg &= ~TVENC_CTL_TPG_CLRBAR;
	break;
	/*
	* TV Encoder - Red Frame Test Pattern
	*/
	case 1:
	reg &= ~TVENC_CTL_TPG_REDCLR;
	break;
	/*
	* TV Encoder - Modulated Ramp Test Pattern
	*/
	default:
	reg &= ~TVENC_CTL_TPG_MODRAMP;
	break;
	}
	}
	}

	static int tvenc_resource_initialized;

	static int tvenc_probe(struct platform_device *pdev)
	{
	struct msm_fb_data_type *mfd;
	struct platform_device *mdp_dev = NULL;
	struct msm_fb_panel_data *pdata = NULL;
	int rc, ret;
	struct clk *ebi1_clk = NULL;

	if (pdev->id == 0) {
	tvenc_base = ioremap(pdev->resource[0].start,
	pdev->resource[0].end -
	pdev->resource[0].start + 1);
	if (!tvenc_base) {
	pr_err("tvenc_base ioremap failed!\n");
	return -ENOMEM;
	}

	tvenc_clk = clk_get(&pdev->dev, "enc_clk");
	tvdac_clk = clk_get(&pdev->dev, "dac_clk");
	tvenc_pclk = clk_get(&pdev->dev, "iface_clk");
	mdp_tv_clk = clk_get(&pdev->dev, "mdp_clk");

	#ifndef CONFIG_MSM_BUS_SCALING
	ebi1_clk = clk_get(&pdev->dev, "mem_clk");
	if (IS_ERR(ebi1_clk)) {
	rc = PTR_ERR(ebi1_clk);
	goto tvenc_probe_err;
	}
	clk_set_rate(ebi1_clk, MSM_SYSTEM_BUS_RATE);
	#endif

	#ifdef CONFIG_FB_MSM_MDP40
	tv_src_clk = clk_get(&pdev->dev, "src_clk");
	if (IS_ERR(tv_src_clk))
	tv_src_clk = tvenc_clk; /* Fallback to slave */
	#endif

	if (IS_ERR(tvenc_clk)) {
	pr_err("%s: error: can't get tvenc_clk!\n", __func__);
	return PTR_ERR(tvenc_clk);
	}

	if (IS_ERR(tvdac_clk)) {
	pr_err("%s: error: can't get tvdac_clk!\n", __func__);
	return PTR_ERR(tvdac_clk);
	}

	if (IS_ERR(tvenc_pclk)) {
	ret = PTR_ERR(tvenc_pclk);
	if (-ENOENT == ret)
	pr_info("%s: tvenc_pclk does not exist!\n",
	__func__);
	else {
	pr_err("%s: error: can't get tvenc_pclk!\n",
	__func__);
	return ret;
	}
	}

	if (IS_ERR(mdp_tv_clk)) {
	ret = PTR_ERR(mdp_tv_clk);
	if (-ENOENT == ret)
	pr_info("%s: mdp_tv_clk does not exist!\n",
	__func__);
	else {
	pr_err("%s: error: can't get mdp_tv_clk!\n",
	__func__);
	return ret;
	}
	}

	tvenc_pdata = pdev->dev.platform_data;
	tvenc_resource_initialized = 1;
	return 0;
	}

	if (!tvenc_resource_initialized)
	return -EPERM;

	mfd = platform_get_drvdata(pdev);
	mfd->ebi1_clk = ebi1_clk;

	if (!mfd)
	return -ENODEV;

	if (mfd->key != MFD_KEY)
	return -EINVAL;

	if (pdev_list_cnt >= MSM_FB_MAX_DEV_LIST)
	return -ENOMEM;

	if (tvenc_base == NULL)
	return -ENOMEM;

	mdp_dev = platform_device_alloc("mdp", pdev->id);
	if (!mdp_dev)
	return -ENOMEM;

	/*
	* link to the latest pdev
	*/
	mfd->pdev = mdp_dev;
	mfd->dest = DISPLAY_TV;

	/*
	* alloc panel device data
	*/
	if (platform_device_add_data
	(mdp_dev, pdev->dev.platform_data,
	sizeof(struct msm_fb_panel_data))) {
	pr_err("tvenc_probe: platform_device_add_data failed!\n");
	platform_device_put(mdp_dev);
	return -ENOMEM;
	}
	/*
	* data chain
	*/
	pdata = mdp_dev->dev.platform_data;
	pdata->on = tvenc_on;
	pdata->off = tvenc_off;
	pdata->next = pdev;

	/*
	* get/set panel specific fb info
	*/
	mfd->panel_info = pdata->panel_info;
	#ifdef CONFIG_FB_MSM_MDP40
	mfd->fb_imgType = MDP_RGB_565; /* base layer */
	#else
	mfd->fb_imgType = MDP_YCRYCB_H2V1;
	#endif

	#ifdef CONFIG_MSM_BUS_SCALING
	if (!tvenc_bus_scale_handle && tvenc_pdata &&
	tvenc_pdata->bus_scale_table) {
	tvenc_bus_scale_handle =
	msm_bus_scale_register_client(
	tvenc_pdata->bus_scale_table);
	if (!tvenc_bus_scale_handle) {
	printk(KERN_ERR "%s not able to get bus scale\n",
	__func__);
	}
	}
	#endif

	/*
	* set driver data
	*/
	platform_set_drvdata(mdp_dev, mfd);

	/*
	* register in mdp driver
	*/
	rc = platform_device_add(mdp_dev);
	if (rc)
	goto tvenc_probe_err;

	pm_runtime_set_active(&pdev->dev);
	pm_runtime_enable(&pdev->dev);



	pdev_list[pdev_list_cnt++] = pdev;

	return 0;

	tvenc_probe_err:
	#ifdef CONFIG_MSM_BUS_SCALING
	if (tvenc_pdata && tvenc_pdata->bus_scale_table &&
	tvenc_bus_scale_handle > 0) {
	msm_bus_scale_unregister_client(tvenc_bus_scale_handle);
	tvenc_bus_scale_handle = 0;
	}
	#endif
	platform_device_put(mdp_dev);
	return rc;
	}

	static int tvenc_remove(struct platform_device *pdev)
	{
	struct msm_fb_data_type *mfd;

	mfd = platform_get_drvdata(pdev);

	#ifdef CONFIG_MSM_BUS_SCALING
	if (tvenc_pdata && tvenc_pdata->bus_scale_table &&
	tvenc_bus_scale_handle > 0) {
	msm_bus_scale_unregister_client(tvenc_bus_scale_handle);
	tvenc_bus_scale_handle = 0;
	}
	#else
	clk_put(mfd->ebi1_clk);
	#endif

	pm_runtime_disable(&pdev->dev);
	return 0;
	}

	static int tvenc_register_driver(void)
	{
	return platform_driver_register(&tvenc_driver);
	}

	static int __init tvenc_driver_init(void)
	{
	return tvenc_register_driver();
	}

	module_init(tvenc_driver_init);