// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (c) 2015-2016 MediaTek Inc.
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* Author: Houlong Wei <houlong.wei@mediatek.com>
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* Ming Hsiu Tsai <minghsiu.tsai@mediatek.com>
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*/
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#include <linux/clk.h>
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#include <linux/device.h>
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#include <linux/errno.h>
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#include <linux/interrupt.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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#include <linux/of_platform.h>
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#include <linux/platform_device.h>
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#include <linux/pm_runtime.h>
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#include <linux/workqueue.h>
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#include <soc/mediatek/smi.h>
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#include "mtk_mdp_core.h"
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#include "mtk_mdp_m2m.h"
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#include "mtk_vpu.h"
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/* MDP debug log level (0-3). 3 shows all the logs. */
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int mtk_mdp_dbg_level;
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EXPORT_SYMBOL(mtk_mdp_dbg_level);
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module_param(mtk_mdp_dbg_level, int, 0644);
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static const struct of_device_id mtk_mdp_comp_dt_ids[] = {
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{
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.compatible = "mediatek,mt8173-mdp-rdma",
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.data = (void *)MTK_MDP_RDMA
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}, {
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.compatible = "mediatek,mt8173-mdp-rsz",
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.data = (void *)MTK_MDP_RSZ
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}, {
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.compatible = "mediatek,mt8173-mdp-wdma",
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.data = (void *)MTK_MDP_WDMA
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}, {
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.compatible = "mediatek,mt8173-mdp-wrot",
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.data = (void *)MTK_MDP_WROT
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},
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{ },
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};
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static const struct of_device_id mtk_mdp_of_ids[] = {
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{ .compatible = "mediatek,mt8173-mdp", },
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{ },
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};
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MODULE_DEVICE_TABLE(of, mtk_mdp_of_ids);
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static void mtk_mdp_clock_on(struct mtk_mdp_dev *mdp)
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{
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struct device *dev = &mdp->pdev->dev;
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struct mtk_mdp_comp *comp_node;
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list_for_each_entry(comp_node, &mdp->comp_list, node)
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mtk_mdp_comp_clock_on(dev, comp_node);
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}
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static void mtk_mdp_clock_off(struct mtk_mdp_dev *mdp)
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{
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struct device *dev = &mdp->pdev->dev;
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struct mtk_mdp_comp *comp_node;
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list_for_each_entry(comp_node, &mdp->comp_list, node)
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mtk_mdp_comp_clock_off(dev, comp_node);
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}
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static void mtk_mdp_wdt_worker(struct work_struct *work)
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{
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struct mtk_mdp_dev *mdp =
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container_of(work, struct mtk_mdp_dev, wdt_work);
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struct mtk_mdp_ctx *ctx;
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mtk_mdp_err("Watchdog timeout");
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list_for_each_entry(ctx, &mdp->ctx_list, list) {
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mtk_mdp_dbg(0, "[%d] Change as state error", ctx->id);
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mtk_mdp_ctx_state_lock_set(ctx, MTK_MDP_CTX_ERROR);
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}
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}
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static void mtk_mdp_reset_handler(void *priv)
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{
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struct mtk_mdp_dev *mdp = priv;
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queue_work(mdp->wdt_wq, &mdp->wdt_work);
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}
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void mtk_mdp_register_component(struct mtk_mdp_dev *mdp,
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struct mtk_mdp_comp *comp)
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{
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list_add(&comp->node, &mdp->comp_list);
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}
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void mtk_mdp_unregister_component(struct mtk_mdp_dev *mdp,
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struct mtk_mdp_comp *comp)
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{
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list_del(&comp->node);
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}
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static int mtk_mdp_probe(struct platform_device *pdev)
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{
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struct mtk_mdp_dev *mdp;
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struct device *dev = &pdev->dev;
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struct device_node *node, *parent;
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struct mtk_mdp_comp *comp, *comp_temp;
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int ret = 0;
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mdp = devm_kzalloc(dev, sizeof(*mdp), GFP_KERNEL);
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if (!mdp)
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return -ENOMEM;
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mdp->id = pdev->id;
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mdp->pdev = pdev;
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INIT_LIST_HEAD(&mdp->comp_list);
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INIT_LIST_HEAD(&mdp->ctx_list);
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mutex_init(&mdp->lock);
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mutex_init(&mdp->vpulock);
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/* Old dts had the components as child nodes */
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node = of_get_next_child(dev->of_node, NULL);
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if (node) {
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of_node_put(node);
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parent = dev->of_node;
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dev_warn(dev, "device tree is out of date\n");
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} else {
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parent = dev->of_node->parent;
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}
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/* Iterate over sibling MDP function blocks */
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for_each_child_of_node(parent, node) {
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const struct of_device_id *of_id;
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enum mtk_mdp_comp_type comp_type;
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of_id = of_match_node(mtk_mdp_comp_dt_ids, node);
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if (!of_id)
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continue;
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if (!of_device_is_available(node)) {
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dev_err(dev, "Skipping disabled component %pOF\n",
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node);
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continue;
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}
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comp_type = (enum mtk_mdp_comp_type)of_id->data;
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comp = devm_kzalloc(dev, sizeof(*comp), GFP_KERNEL);
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if (!comp) {
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ret = -ENOMEM;
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of_node_put(node);
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goto err_comp;
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}
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ret = mtk_mdp_comp_init(dev, node, comp, comp_type);
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if (ret) {
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of_node_put(node);
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goto err_comp;
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}
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mtk_mdp_register_component(mdp, comp);
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}
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mdp->job_wq = create_singlethread_workqueue(MTK_MDP_MODULE_NAME);
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if (!mdp->job_wq) {
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dev_err(&pdev->dev, "unable to alloc job workqueue\n");
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ret = -ENOMEM;
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goto err_alloc_job_wq;
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}
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mdp->wdt_wq = create_singlethread_workqueue("mdp_wdt_wq");
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if (!mdp->wdt_wq) {
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dev_err(&pdev->dev, "unable to alloc wdt workqueue\n");
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ret = -ENOMEM;
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goto err_alloc_wdt_wq;
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}
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INIT_WORK(&mdp->wdt_work, mtk_mdp_wdt_worker);
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ret = v4l2_device_register(dev, &mdp->v4l2_dev);
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if (ret) {
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dev_err(&pdev->dev, "Failed to register v4l2 device\n");
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ret = -EINVAL;
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goto err_dev_register;
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}
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ret = mtk_mdp_register_m2m_device(mdp);
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if (ret) {
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v4l2_err(&mdp->v4l2_dev, "Failed to init mem2mem device\n");
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goto err_m2m_register;
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}
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mdp->vpu_dev = vpu_get_plat_device(pdev);
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ret = vpu_wdt_reg_handler(mdp->vpu_dev, mtk_mdp_reset_handler, mdp,
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VPU_RST_MDP);
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if (ret) {
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dev_err(&pdev->dev, "Failed to register reset handler\n");
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goto err_m2m_register;
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}
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platform_set_drvdata(pdev, mdp);
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ret = vb2_dma_contig_set_max_seg_size(&pdev->dev, DMA_BIT_MASK(32));
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if (ret) {
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dev_err(&pdev->dev, "Failed to set vb2 dma mag seg size\n");
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goto err_m2m_register;
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}
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pm_runtime_enable(dev);
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dev_dbg(dev, "mdp-%d registered successfully\n", mdp->id);
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return 0;
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err_m2m_register:
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v4l2_device_unregister(&mdp->v4l2_dev);
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err_dev_register:
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destroy_workqueue(mdp->wdt_wq);
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err_alloc_wdt_wq:
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destroy_workqueue(mdp->job_wq);
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err_alloc_job_wq:
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err_comp:
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list_for_each_entry_safe(comp, comp_temp, &mdp->comp_list, node) {
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mtk_mdp_unregister_component(mdp, comp);
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mtk_mdp_comp_deinit(dev, comp);
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}
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dev_dbg(dev, "err %d\n", ret);
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return ret;
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}
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static int mtk_mdp_remove(struct platform_device *pdev)
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{
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struct mtk_mdp_dev *mdp = platform_get_drvdata(pdev);
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struct mtk_mdp_comp *comp, *comp_temp;
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pm_runtime_disable(&pdev->dev);
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vb2_dma_contig_clear_max_seg_size(&pdev->dev);
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mtk_mdp_unregister_m2m_device(mdp);
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v4l2_device_unregister(&mdp->v4l2_dev);
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flush_workqueue(mdp->wdt_wq);
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destroy_workqueue(mdp->wdt_wq);
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flush_workqueue(mdp->job_wq);
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destroy_workqueue(mdp->job_wq);
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list_for_each_entry_safe(comp, comp_temp, &mdp->comp_list, node) {
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mtk_mdp_unregister_component(mdp, comp);
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mtk_mdp_comp_deinit(&pdev->dev, comp);
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}
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dev_dbg(&pdev->dev, "%s driver unloaded\n", pdev->name);
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return 0;
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}
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static int __maybe_unused mtk_mdp_pm_suspend(struct device *dev)
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{
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struct mtk_mdp_dev *mdp = dev_get_drvdata(dev);
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mtk_mdp_clock_off(mdp);
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return 0;
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}
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static int __maybe_unused mtk_mdp_pm_resume(struct device *dev)
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{
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struct mtk_mdp_dev *mdp = dev_get_drvdata(dev);
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mtk_mdp_clock_on(mdp);
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return 0;
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}
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static int __maybe_unused mtk_mdp_suspend(struct device *dev)
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{
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if (pm_runtime_suspended(dev))
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return 0;
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return mtk_mdp_pm_suspend(dev);
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}
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static int __maybe_unused mtk_mdp_resume(struct device *dev)
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{
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if (pm_runtime_suspended(dev))
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return 0;
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return mtk_mdp_pm_resume(dev);
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}
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static const struct dev_pm_ops mtk_mdp_pm_ops = {
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SET_SYSTEM_SLEEP_PM_OPS(mtk_mdp_suspend, mtk_mdp_resume)
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SET_RUNTIME_PM_OPS(mtk_mdp_pm_suspend, mtk_mdp_pm_resume, NULL)
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};
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static struct platform_driver mtk_mdp_driver = {
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.probe = mtk_mdp_probe,
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.remove = mtk_mdp_remove,
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.driver = {
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.name = MTK_MDP_MODULE_NAME,
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.pm = &mtk_mdp_pm_ops,
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.of_match_table = mtk_mdp_of_ids,
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}
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};
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module_platform_driver(mtk_mdp_driver);
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MODULE_AUTHOR("Houlong Wei <houlong.wei@mediatek.com>");
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MODULE_DESCRIPTION("Mediatek image processor driver");
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MODULE_LICENSE("GPL v2");
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