drivers/media/platform/mtk-mdp/mtk_mdp_core.c - linux - Git at Google

 /*
  * Copyright (c) 2015-2016 MediaTek Inc.
  * Author: Houlong Wei <houlong.wei@mediatek.com>
  *         Ming Hsiu Tsai <minghsiu.tsai@mediatek.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.
  *
  * 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/clk.h>
 #include <linux/device.h>
 #include <linux/errno.h>
 #include <linux/interrupt.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/of_address.h>
 #include <linux/of_platform.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/workqueue.h>
 #include <soc/mediatek/smi.h>

 #include "mtk_mdp_core.h"
 #include "mtk_mdp_m2m.h"
 #include "mtk_vpu.h"

 /* MDP debug log level (0-3). 3 shows all the logs. */
 int mtk_mdp_dbg_level;
 EXPORT_SYMBOL(mtk_mdp_dbg_level);

 module_param(mtk_mdp_dbg_level, int, 0644);

 static const struct of_device_id mtk_mdp_comp_dt_ids[] = {
 	{
 		.compatible = "mediatek,mt8173-mdp-rdma",
 		.data = (void *)MTK_MDP_RDMA
 	}, {
 		.compatible = "mediatek,mt8173-mdp-rsz",
 		.data = (void *)MTK_MDP_RSZ
 	}, {
 		.compatible = "mediatek,mt8173-mdp-wdma",
 		.data = (void *)MTK_MDP_WDMA
 	}, {
 		.compatible = "mediatek,mt8173-mdp-wrot",
 		.data = (void *)MTK_MDP_WROT
 	},
 	{ },
 };

 static const struct of_device_id mtk_mdp_of_ids[] = {
 	{ .compatible = "mediatek,mt8173-mdp", },
 	{ },
 };
 MODULE_DEVICE_TABLE(of, mtk_mdp_of_ids);

 static void mtk_mdp_clock_on(struct mtk_mdp_dev *mdp)
 {
 	struct device *dev = &mdp->pdev->dev;
 	int i;

 	for (i = 0; i < ARRAY_SIZE(mdp->comp); i++)
 		mtk_mdp_comp_clock_on(dev, mdp->comp[i]);
 }

 static void mtk_mdp_clock_off(struct mtk_mdp_dev *mdp)
 {
 	struct device *dev = &mdp->pdev->dev;
 	int i;

 	for (i = 0; i < ARRAY_SIZE(mdp->comp); i++)
 		mtk_mdp_comp_clock_off(dev, mdp->comp[i]);
 }

 static void mtk_mdp_wdt_worker(struct work_struct *work)
 {
 	struct mtk_mdp_dev *mdp =
 			container_of(work, struct mtk_mdp_dev, wdt_work);
 	struct mtk_mdp_ctx *ctx;

 	mtk_mdp_err("Watchdog timeout");

 	list_for_each_entry(ctx, &mdp->ctx_list, list) {
 		mtk_mdp_dbg(0, "[%d] Change as state error", ctx->id);
 		mtk_mdp_ctx_state_lock_set(ctx, MTK_MDP_CTX_ERROR);
 	}
 }

 static void mtk_mdp_reset_handler(void *priv)
 {
 	struct mtk_mdp_dev *mdp = priv;

 	queue_work(mdp->wdt_wq, &mdp->wdt_work);
 }

 static int mtk_mdp_probe(struct platform_device *pdev)
 {
 	struct mtk_mdp_dev *mdp;
 	struct device *dev = &pdev->dev;
 	struct device_node *node, *parent;
 	int i, ret = 0;

 	mdp = devm_kzalloc(dev, sizeof(*mdp), GFP_KERNEL);
 	if (!mdp)
 		return -ENOMEM;

 	mdp->id = pdev->id;
 	mdp->pdev = pdev;
 	INIT_LIST_HEAD(&mdp->ctx_list);

 	mutex_init(&mdp->lock);
 	mutex_init(&mdp->vpulock);

 	/* Old dts had the components as child nodes */
 	if (of_get_next_child(dev->of_node, NULL)) {
 		parent = dev->of_node;
 		dev_warn(dev, "device tree is out of date\n");
 	} else {
 		parent = dev->of_node->parent;
 	}

 	/* Iterate over sibling MDP function blocks */
 	for_each_child_of_node(parent, node) {
 		const struct of_device_id *of_id;
 		enum mtk_mdp_comp_type comp_type;
 		int comp_id;
 		struct mtk_mdp_comp *comp;

 		of_id = of_match_node(mtk_mdp_comp_dt_ids, node);
 		if (!of_id)
 			continue;

 		if (!of_device_is_available(node)) {
 			dev_err(dev, "Skipping disabled component %pOF\n",
 				node);
 			continue;
 		}

 		comp_type = (enum mtk_mdp_comp_type)of_id->data;
 		comp_id = mtk_mdp_comp_get_id(dev, node, comp_type);
 		if (comp_id < 0) {
 			dev_warn(dev, "Skipping unknown component %pOF\n",
 				 node);
 			continue;
 		}

 		comp = devm_kzalloc(dev, sizeof(*comp), GFP_KERNEL);
 		if (!comp) {
 			ret = -ENOMEM;
 			goto err_comp;
 		}
 		mdp->comp[comp_id] = comp;

 		ret = mtk_mdp_comp_init(dev, node, comp, comp_id);
 		if (ret)
 			goto err_comp;
 	}

 	mdp->job_wq = create_singlethread_workqueue(MTK_MDP_MODULE_NAME);
 	if (!mdp->job_wq) {
 		dev_err(&pdev->dev, "unable to alloc job workqueue\n");
 		ret = -ENOMEM;
 		goto err_alloc_job_wq;
 	}

 	mdp->wdt_wq = create_singlethread_workqueue("mdp_wdt_wq");
 	if (!mdp->wdt_wq) {
 		dev_err(&pdev->dev, "unable to alloc wdt workqueue\n");
 		ret = -ENOMEM;
 		goto err_alloc_wdt_wq;
 	}
 	INIT_WORK(&mdp->wdt_work, mtk_mdp_wdt_worker);

 	ret = v4l2_device_register(dev, &mdp->v4l2_dev);
 	if (ret) {
 		dev_err(&pdev->dev, "Failed to register v4l2 device\n");
 		ret = -EINVAL;
 		goto err_dev_register;
 	}

 	ret = mtk_mdp_register_m2m_device(mdp);
 	if (ret) {
 		v4l2_err(&mdp->v4l2_dev, "Failed to init mem2mem device\n");
 		goto err_m2m_register;
 	}

 	mdp->vpu_dev = vpu_get_plat_device(pdev);
 	vpu_wdt_reg_handler(mdp->vpu_dev, mtk_mdp_reset_handler, mdp,
 			    VPU_RST_MDP);

 	platform_set_drvdata(pdev, mdp);

 	vb2_dma_contig_set_max_seg_size(&pdev->dev, DMA_BIT_MASK(32));

 	pm_runtime_enable(dev);
 	dev_dbg(dev, "mdp-%d registered successfully\n", mdp->id);

 	return 0;

 err_m2m_register:
 	v4l2_device_unregister(&mdp->v4l2_dev);

 err_dev_register:
 	destroy_workqueue(mdp->wdt_wq);

 err_alloc_wdt_wq:
 	destroy_workqueue(mdp->job_wq);

 err_alloc_job_wq:

 err_comp:
 	for (i = 0; i < ARRAY_SIZE(mdp->comp); i++)
 		mtk_mdp_comp_deinit(dev, mdp->comp[i]);

 	dev_dbg(dev, "err %d\n", ret);
 	return ret;
 }

 static int mtk_mdp_remove(struct platform_device *pdev)
 {
 	struct mtk_mdp_dev *mdp = platform_get_drvdata(pdev);
 	int i;

 	pm_runtime_disable(&pdev->dev);
 	vb2_dma_contig_clear_max_seg_size(&pdev->dev);
 	mtk_mdp_unregister_m2m_device(mdp);
 	v4l2_device_unregister(&mdp->v4l2_dev);

 	flush_workqueue(mdp->job_wq);
 	destroy_workqueue(mdp->job_wq);

 	for (i = 0; i < ARRAY_SIZE(mdp->comp); i++)
 		mtk_mdp_comp_deinit(&pdev->dev, mdp->comp[i]);

 	dev_dbg(&pdev->dev, "%s driver unloaded\n", pdev->name);
 	return 0;
 }

 static int __maybe_unused mtk_mdp_pm_suspend(struct device *dev)
 {
 	struct mtk_mdp_dev *mdp = dev_get_drvdata(dev);

 	mtk_mdp_clock_off(mdp);

 	return 0;
 }

 static int __maybe_unused mtk_mdp_pm_resume(struct device *dev)
 {
 	struct mtk_mdp_dev *mdp = dev_get_drvdata(dev);

 	mtk_mdp_clock_on(mdp);

 	return 0;
 }

 static int __maybe_unused mtk_mdp_suspend(struct device *dev)
 {
 	if (pm_runtime_suspended(dev))
 		return 0;

 	return mtk_mdp_pm_suspend(dev);
 }

 static int __maybe_unused mtk_mdp_resume(struct device *dev)
 {
 	if (pm_runtime_suspended(dev))
 		return 0;

 	return mtk_mdp_pm_resume(dev);
 }

 static const struct dev_pm_ops mtk_mdp_pm_ops = {
 	SET_SYSTEM_SLEEP_PM_OPS(mtk_mdp_suspend, mtk_mdp_resume)
 	SET_RUNTIME_PM_OPS(mtk_mdp_pm_suspend, mtk_mdp_pm_resume, NULL)
 };

 static struct platform_driver mtk_mdp_driver = {
 	.probe		= mtk_mdp_probe,
 	.remove		= mtk_mdp_remove,
 	.driver = {
 		.name	= MTK_MDP_MODULE_NAME,
 		.pm	= &mtk_mdp_pm_ops,
 		.of_match_table = mtk_mdp_of_ids,
 	}
 };

 module_platform_driver(mtk_mdp_driver);

 MODULE_AUTHOR("Houlong Wei <houlong.wei@mediatek.com>");
 MODULE_DESCRIPTION("Mediatek image processor driver");
 MODULE_LICENSE("GPL v2");
	/*
	* Copyright (c) 2015-2016 MediaTek Inc.
	* Author: Houlong Wei <houlong.wei@mediatek.com>
	* Ming Hsiu Tsai <minghsiu.tsai@mediatek.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.
	*
	* 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/clk.h>
	#include <linux/device.h>
	#include <linux/errno.h>
	#include <linux/interrupt.h>
	#include <linux/kernel.h>
	#include <linux/module.h>
	#include <linux/of.h>
	#include <linux/of_address.h>
	#include <linux/of_platform.h>
	#include <linux/platform_device.h>
	#include <linux/pm_runtime.h>
	#include <linux/workqueue.h>
	#include <soc/mediatek/smi.h>

	#include "mtk_mdp_core.h"
	#include "mtk_mdp_m2m.h"
	#include "mtk_vpu.h"

	/* MDP debug log level (0-3). 3 shows all the logs. */
	int mtk_mdp_dbg_level;
	EXPORT_SYMBOL(mtk_mdp_dbg_level);

	module_param(mtk_mdp_dbg_level, int, 0644);

	static const struct of_device_id mtk_mdp_comp_dt_ids[] = {
	{
	.compatible = "mediatek,mt8173-mdp-rdma",
	.data = (void *)MTK_MDP_RDMA
	}, {
	.compatible = "mediatek,mt8173-mdp-rsz",
	.data = (void *)MTK_MDP_RSZ
	}, {
	.compatible = "mediatek,mt8173-mdp-wdma",
	.data = (void *)MTK_MDP_WDMA
	}, {
	.compatible = "mediatek,mt8173-mdp-wrot",
	.data = (void *)MTK_MDP_WROT
	},
	{ },
	};

	static const struct of_device_id mtk_mdp_of_ids[] = {
	{ .compatible = "mediatek,mt8173-mdp", },
	{ },
	};
	MODULE_DEVICE_TABLE(of, mtk_mdp_of_ids);

	static void mtk_mdp_clock_on(struct mtk_mdp_dev *mdp)
	{
	struct device *dev = &mdp->pdev->dev;
	int i;

	for (i = 0; i < ARRAY_SIZE(mdp->comp); i++)
	mtk_mdp_comp_clock_on(dev, mdp->comp[i]);
	}

	static void mtk_mdp_clock_off(struct mtk_mdp_dev *mdp)
	{
	struct device *dev = &mdp->pdev->dev;
	int i;

	for (i = 0; i < ARRAY_SIZE(mdp->comp); i++)
	mtk_mdp_comp_clock_off(dev, mdp->comp[i]);
	}

	static void mtk_mdp_wdt_worker(struct work_struct *work)
	{
	struct mtk_mdp_dev *mdp =
	container_of(work, struct mtk_mdp_dev, wdt_work);
	struct mtk_mdp_ctx *ctx;

	mtk_mdp_err("Watchdog timeout");

	list_for_each_entry(ctx, &mdp->ctx_list, list) {
	mtk_mdp_dbg(0, "[%d] Change as state error", ctx->id);
	mtk_mdp_ctx_state_lock_set(ctx, MTK_MDP_CTX_ERROR);
	}
	}

	static void mtk_mdp_reset_handler(void *priv)
	{
	struct mtk_mdp_dev *mdp = priv;

	queue_work(mdp->wdt_wq, &mdp->wdt_work);
	}

	static int mtk_mdp_probe(struct platform_device *pdev)
	{
	struct mtk_mdp_dev *mdp;
	struct device *dev = &pdev->dev;
	struct device_node node, parent;
	int i, ret = 0;

	mdp = devm_kzalloc(dev, sizeof(*mdp), GFP_KERNEL);
	if (!mdp)
	return -ENOMEM;

	mdp->id = pdev->id;
	mdp->pdev = pdev;
	INIT_LIST_HEAD(&mdp->ctx_list);

	mutex_init(&mdp->lock);
	mutex_init(&mdp->vpulock);

	/* Old dts had the components as child nodes */
	if (of_get_next_child(dev->of_node, NULL)) {
	parent = dev->of_node;
	dev_warn(dev, "device tree is out of date\n");
	} else {
	parent = dev->of_node->parent;
	}

	/* Iterate over sibling MDP function blocks */
	for_each_child_of_node(parent, node) {
	const struct of_device_id *of_id;
	enum mtk_mdp_comp_type comp_type;
	int comp_id;
	struct mtk_mdp_comp *comp;

	of_id = of_match_node(mtk_mdp_comp_dt_ids, node);
	if (!of_id)
	continue;

	if (!of_device_is_available(node)) {
	dev_err(dev, "Skipping disabled component %pOF\n",
	node);
	continue;
	}

	comp_type = (enum mtk_mdp_comp_type)of_id->data;
	comp_id = mtk_mdp_comp_get_id(dev, node, comp_type);
	if (comp_id < 0) {
	dev_warn(dev, "Skipping unknown component %pOF\n",
	node);
	continue;
	}

	comp = devm_kzalloc(dev, sizeof(*comp), GFP_KERNEL);
	if (!comp) {
	ret = -ENOMEM;
	goto err_comp;
	}
	mdp->comp[comp_id] = comp;

	ret = mtk_mdp_comp_init(dev, node, comp, comp_id);
	if (ret)
	goto err_comp;
	}

	mdp->job_wq = create_singlethread_workqueue(MTK_MDP_MODULE_NAME);
	if (!mdp->job_wq) {
	dev_err(&pdev->dev, "unable to alloc job workqueue\n");
	ret = -ENOMEM;
	goto err_alloc_job_wq;
	}

	mdp->wdt_wq = create_singlethread_workqueue("mdp_wdt_wq");
	if (!mdp->wdt_wq) {
	dev_err(&pdev->dev, "unable to alloc wdt workqueue\n");
	ret = -ENOMEM;
	goto err_alloc_wdt_wq;
	}
	INIT_WORK(&mdp->wdt_work, mtk_mdp_wdt_worker);

	ret = v4l2_device_register(dev, &mdp->v4l2_dev);
	if (ret) {
	dev_err(&pdev->dev, "Failed to register v4l2 device\n");
	ret = -EINVAL;
	goto err_dev_register;
	}

	ret = mtk_mdp_register_m2m_device(mdp);
	if (ret) {
	v4l2_err(&mdp->v4l2_dev, "Failed to init mem2mem device\n");
	goto err_m2m_register;
	}

	mdp->vpu_dev = vpu_get_plat_device(pdev);
	vpu_wdt_reg_handler(mdp->vpu_dev, mtk_mdp_reset_handler, mdp,
	VPU_RST_MDP);

	platform_set_drvdata(pdev, mdp);

	vb2_dma_contig_set_max_seg_size(&pdev->dev, DMA_BIT_MASK(32));

	pm_runtime_enable(dev);
	dev_dbg(dev, "mdp-%d registered successfully\n", mdp->id);

	return 0;

	err_m2m_register:
	v4l2_device_unregister(&mdp->v4l2_dev);

	err_dev_register:
	destroy_workqueue(mdp->wdt_wq);

	err_alloc_wdt_wq:
	destroy_workqueue(mdp->job_wq);

	err_alloc_job_wq:

	err_comp:
	for (i = 0; i < ARRAY_SIZE(mdp->comp); i++)
	mtk_mdp_comp_deinit(dev, mdp->comp[i]);

	dev_dbg(dev, "err %d\n", ret);
	return ret;
	}

	static int mtk_mdp_remove(struct platform_device *pdev)
	{
	struct mtk_mdp_dev *mdp = platform_get_drvdata(pdev);
	int i;

	pm_runtime_disable(&pdev->dev);
	vb2_dma_contig_clear_max_seg_size(&pdev->dev);
	mtk_mdp_unregister_m2m_device(mdp);
	v4l2_device_unregister(&mdp->v4l2_dev);

	flush_workqueue(mdp->job_wq);
	destroy_workqueue(mdp->job_wq);

	for (i = 0; i < ARRAY_SIZE(mdp->comp); i++)
	mtk_mdp_comp_deinit(&pdev->dev, mdp->comp[i]);

	dev_dbg(&pdev->dev, "%s driver unloaded\n", pdev->name);
	return 0;
	}

	static int __maybe_unused mtk_mdp_pm_suspend(struct device *dev)
	{
	struct mtk_mdp_dev *mdp = dev_get_drvdata(dev);

	mtk_mdp_clock_off(mdp);

	return 0;
	}

	static int __maybe_unused mtk_mdp_pm_resume(struct device *dev)
	{
	struct mtk_mdp_dev *mdp = dev_get_drvdata(dev);

	mtk_mdp_clock_on(mdp);

	return 0;
	}

	static int __maybe_unused mtk_mdp_suspend(struct device *dev)
	{
	if (pm_runtime_suspended(dev))
	return 0;

	return mtk_mdp_pm_suspend(dev);
	}

	static int __maybe_unused mtk_mdp_resume(struct device *dev)
	{
	if (pm_runtime_suspended(dev))
	return 0;

	return mtk_mdp_pm_resume(dev);
	}

	static const struct dev_pm_ops mtk_mdp_pm_ops = {
	SET_SYSTEM_SLEEP_PM_OPS(mtk_mdp_suspend, mtk_mdp_resume)
	SET_RUNTIME_PM_OPS(mtk_mdp_pm_suspend, mtk_mdp_pm_resume, NULL)
	};

	static struct platform_driver mtk_mdp_driver = {
	.probe = mtk_mdp_probe,
	.remove = mtk_mdp_remove,
	.driver = {
	.name = MTK_MDP_MODULE_NAME,
	.pm = &mtk_mdp_pm_ops,
	.of_match_table = mtk_mdp_of_ids,
	}
	};

	module_platform_driver(mtk_mdp_driver);

	MODULE_AUTHOR("Houlong Wei <houlong.wei@mediatek.com>");
	MODULE_DESCRIPTION("Mediatek image processor driver");
	MODULE_LICENSE("GPL v2");