[media] media: Add Mediatek MDP Driver

Add MDP driver for MT8173

Signed-off-by: Minghsiu Tsai <minghsiu.tsai@mediatek.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

1 files changed, 294 insertions, 0 deletions

diff --git a/drivers/media/platform/mtk-mdp/mtk_mdp_core.c b/drivers/media/platform/mtk-mdp/mtk_mdp_core.c
new file mode 100644
index 000000000000..7e35235d82e2
--- /dev/null
+++ b/drivers/media/platform/mtk-mdp/mtk_mdp_core.c
@@ -0,0 +1,294 @@
+/*
+ * 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;
+	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);
+
+	/* Iterate over sibling MDP function blocks */
+	for_each_child_of_node(dev->of_node, 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 %s\n",
+				node->full_name);
+			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 %s\n",
+				 node->full_name);
+			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;
+}
+
+#if defined(CONFIG_PM_RUNTIME) || defined(CONFIG_PM_SLEEP)
+static int 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 mtk_mdp_pm_resume(struct device *dev)
+{
+	struct mtk_mdp_dev *mdp = dev_get_drvdata(dev);
+
+	mtk_mdp_clock_on(mdp);
+
+	return 0;
+}
+#endif /* CONFIG_PM_RUNTIME || CONFIG_PM_SLEEP */
+
+#ifdef CONFIG_PM_SLEEP
+static int mtk_mdp_suspend(struct device *dev)
+{
+	if (pm_runtime_suspended(dev))
+		return 0;
+
+	return mtk_mdp_pm_suspend(dev);
+}
+
+static int mtk_mdp_resume(struct device *dev)
+{
+	if (pm_runtime_suspended(dev))
+		return 0;
+
+	return mtk_mdp_pm_resume(dev);
+}
+#endif /* CONFIG_PM_SLEEP */
+
+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,
+		.owner	= THIS_MODULE,
+		.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");