Message-ID: <1554724505-19882-2-git-send-email-stu.hsieh@mediatek.com>
Date:   Mon, 8 Apr 2019 19:54:52 +0800
From:   Stu Hsieh <stu.hsieh@...iatek.com>
To:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>
CC:     Stu Hsieh <stu.hsieh@...iatek.com>, <linux-kernel@...r.kernel.org>,
        <linux-media@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>, <srv_heupstream@...iatek.com>
Subject: [PATCH 01/14] [media] mtk-mipicsi: add mediatek mipicsi driver for mt2712

This patch add mediatek mipicsi driver for mt2712,
including probe function to get the value from device tree,
and register to v4l2 the host device.

Signed-off-by: Stu Hsieh <stu.hsieh@...iatek.com>
---
 drivers/media/platform/mtk-mipicsi/Makefile   |   4 +
 .../media/platform/mtk-mipicsi/mtk_mipicsi.c  | 768 ++++++++++++++++++
 2 files changed, 772 insertions(+)
 create mode 100644 drivers/media/platform/mtk-mipicsi/Makefile
 create mode 100644 drivers/media/platform/mtk-mipicsi/mtk_mipicsi.c

diff --git a/drivers/media/platform/mtk-mipicsi/Makefile b/drivers/media/platform/mtk-mipicsi/Makefile
new file mode 100644
index 000000000000..326a5e3808fa
--- /dev/null
+++ b/drivers/media/platform/mtk-mipicsi/Makefile
@@ -0,0 +1,4 @@
+mtk-mipicsi-y += mtk_mipicsi.o
+
+obj-$(CONFIG_VIDEO_MEDIATEK_MIPICSI) += mtk-mipicsi.o
+
diff --git a/drivers/media/platform/mtk-mipicsi/mtk_mipicsi.c b/drivers/media/platform/mtk-mipicsi/mtk_mipicsi.c
new file mode 100644
index 000000000000..2e6c3073c064
--- /dev/null
+++ b/drivers/media/platform/mtk-mipicsi/mtk_mipicsi.c
@@ -0,0 +1,768 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2017 MediaTek Inc.
+ * Author: Ricky Zhang <ricky.zhang@...iatek.com>
+ *         Baoyin Zhang <baoyin.zhang@...iatek.com>
+ *         Alan Yue <alan.yue@...iatek.com>
+ *         Stu Hsieh <stu.hsieh@...iatek.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
+ * http://www.gnu.org/licenses/gpl-2.0.html for more details.
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/io.h>
+#include <linux/delay.h>
+#include <linux/dma-mapping.h>
+#include <linux/err.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/moduleparam.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/pm_runtime.h>
+#include <linux/iommu.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <media/v4l2-common.h>
+#include <media/v4l2-dev.h>
+#include <media/videobuf2-dma-contig.h>
+#include <media/soc_camera.h>
+#include <media/drv-intf/soc_mediabus.h>
+#include <media/videobuf2-core.h>
+#include <linux/videodev2.h>
+#include <soc/mediatek/smi.h>
+#include <linux/regmap.h>
+#include <linux/mfd/syscon.h>
+
+#ifdef CONFIG_VB2_MEDIATEK_DMA_SG
+#include "mtkbuf-dma-cache-sg.h"
+#endif
+
+#define MTK_MIPICSI_DRV_NAME "mtk-mipicsi"
+#define MTK_PLATFORM_STR "platform:mt2712"
+#define MIPICSI_COMMON_CLK 2
+#define MTK_CAMDMA_MAX_NUM 4U
+#define MIPICSI_CLK (MIPICSI_COMMON_CLK + MTK_CAMDMA_MAX_NUM)
+#define MTK_DATAWIDTH_8					(0x01U << 7U)
+#define MAX_SUPPORT_WIDTH             4096U
+#define MAX_SUPPORT_HEIGHT            4096U
+#define MAX_BUFFER_NUM			32U
+#define VID_LIMIT_BYTES			(100U * 1024U * 1024U)
+
+/* buffer for one video frame */
+struct mtk_mipicsi_buf {
+	struct list_head queue;
+	struct vb2_buffer *vb;
+	dma_addr_t vb_dma_addr_phy;
+	int prepare_flag;
+};
+
+struct mtk_mipicsi_dev {
+	struct soc_camera_host	soc_host;
+	struct platform_device *pdev;
+	unsigned int camsv_num;
+	struct v4l2_device	v4l2_dev;
+	struct device *larb_pdev;
+	void __iomem		*ana;
+	void __iomem		*seninf_ctrl;
+	void __iomem		*seninf;
+	struct regmap		*seninf_top;
+	void __iomem		*seninf_mux[MTK_CAMDMA_MAX_NUM];
+	void __iomem		*camsv[MTK_CAMDMA_MAX_NUM];
+	const struct soc_camera_format_xlate *current_fmt;
+	u16				width_flags;	/* max 12 bits */
+	struct list_head	capture_list[MTK_CAMDMA_MAX_NUM];
+	struct list_head	fb_list;
+	spinlock_t		lock;
+	spinlock_t		queue_lock;
+	struct mtk_mipicsi_buf	cam_buf[MAX_BUFFER_NUM];
+	bool streamon;
+	unsigned long frame_cnt[MTK_CAMDMA_MAX_NUM];
+	unsigned int link;
+	unsigned long enqueue_cnt;
+	unsigned long dequeue_cnt;
+	struct v4l2_ctrl_handler ctrl_hdl;
+	char drv_name[16];
+	u32 id;
+	int clk_num;
+	struct clk		*clk[MIPICSI_CLK];
+};
+
+#define MTK_MIPICSI_BUS_PARAM (V4L2_MBUS_MASTER |	\
+		V4L2_MBUS_HSYNC_ACTIVE_HIGH |	\
+		V4L2_MBUS_HSYNC_ACTIVE_LOW |	\
+		V4L2_MBUS_VSYNC_ACTIVE_HIGH |	\
+		V4L2_MBUS_VSYNC_ACTIVE_LOW |	\
+		V4L2_MBUS_PCLK_SAMPLE_RISING |	\
+		V4L2_MBUS_PCLK_SAMPLE_FALLING |	\
+		V4L2_MBUS_DATA_ACTIVE_HIGH)
+
+static int mtk_mipicsi_add_device(struct soc_camera_device *icd)
+{
+	struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
+	struct v4l2_subdev_format format = {
+		.which = V4L2_SUBDEV_FORMAT_ACTIVE,
+	};
+	int ret;
+
+	/* Get width/height info from subdev. Then use them to set register */
+	ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &format);
+	if (ret < 0) {
+		dev_err(icd->parent, "sub device get_fmt fail\n");
+		return ret;
+	}
+
+	/*
+	 * If power domain was closed before, it will be open.
+	 * Then clock will be open and register will be set
+	 */
+	(void)pm_runtime_get_sync(icd->parent);
+	return 0;
+}
+
+static void mtk_mipicsi_remove_device(struct soc_camera_device *icd)
+{
+	(void)pm_runtime_put_sync(icd->parent);
+}
+
+static int mtk_mipicsi_set_fmt(struct soc_camera_device *icd,
+				struct v4l2_format *f)
+{
+	struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
+	struct mtk_mipicsi_dev *mipicsi = ici->priv;
+	struct device *dev = &mipicsi->pdev->dev;
+	struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
+	const struct soc_camera_format_xlate *xlate = NULL;
+	struct v4l2_pix_format *pix = &f->fmt.pix;
+	struct v4l2_subdev_format format = {
+		.which = V4L2_SUBDEV_FORMAT_ACTIVE,
+	};
+	struct v4l2_mbus_framefmt *mf = &format.format;
+	int ret = 0;
+
+	xlate = soc_camera_xlate_by_fourcc(icd, pix->pixelformat);
+	if (xlate == NULL) {
+		dev_err(dev, "Format 0x%x not found\n", pix->pixelformat);
+		return -EINVAL;
+	}
+
+	mf->width	= pix->width;
+	mf->height	= pix->height;
+	mf->field	= pix->field;
+	mf->colorspace	= pix->colorspace;
+	mf->code	= xlate->code;
+
+	ret = v4l2_subdev_call(sd, pad, set_fmt, NULL, &format);
+	pix->width		= mf->width;
+	pix->height		= mf->height;
+	pix->field		= mf->field;
+	pix->colorspace		= mf->colorspace;
+	icd->current_fmt	= xlate;
+	if (pix->pixelformat == V4L2_PIX_FMT_YUYV)
+		pix->sizeimage = pix->width * pix->height * 2U;
+
+	if (mf->code != xlate->code)
+		return -EINVAL;
+
+	return ret;
+}
+
+static int mtk_mipicsi_try_fmt(struct soc_camera_device *icd,
+			      struct v4l2_format *f)
+{
+	struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
+	const struct soc_camera_format_xlate *xlate = NULL;
+	struct v4l2_pix_format *pix = &f->fmt.pix;
+	struct v4l2_subdev_pad_config pad_cfg;
+	struct v4l2_subdev_format format = {
+		.which = V4L2_SUBDEV_FORMAT_TRY,
+	};
+	struct v4l2_mbus_framefmt *mf = &format.format;
+	u32 pixfmt = pix->pixelformat;
+	int ret = 0;
+
+	xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
+	if (xlate == NULL) {
+		xlate = icd->current_fmt;
+		dev_dbg(icd->parent, "Format %x not found, keeping %x\n",
+			pixfmt, xlate->host_fmt->fourcc);
+		pixfmt = xlate->host_fmt->fourcc;
+		pix->pixelformat = pixfmt;
+		pix->colorspace = icd->colorspace;
+	}
+
+	/* limit to  MTK hardware capabilities */
+	pix->height = min(pix->height, MAX_SUPPORT_HEIGHT);
+	pix->width = min(pix->width, MAX_SUPPORT_WIDTH);
+
+	/* limit to sensor capabilities */
+	mf->width	= pix->width;
+	mf->height	= pix->height;
+	mf->field	= pix->field;
+	mf->colorspace	= pix->colorspace;
+	mf->code	= xlate->code;
+
+	ret = v4l2_subdev_call(sd, pad, set_fmt, &pad_cfg, &format);
+	if (ret < 0)
+		return ret;
+
+	pix->width	= mf->width;
+	pix->height	= mf->height;
+	pix->field	= mf->field;
+	pix->colorspace	= mf->colorspace;
+	pix->bytesperline = pix->width * 2U;
+	pix->sizeimage = pix->bytesperline * pix->height;
+
+	return ret;
+}
+
+static int mtk_mipicsi_vb2_queue_setup(struct vb2_queue *vq,
+		unsigned int *nbufs,
+		unsigned int *num_planes, unsigned int sizes[],
+		struct device *alloc_devs[])
+{
+	struct soc_camera_device *icd = soc_camera_from_vb2q(vq);
+	u32 sizeimage = icd->sizeimage;
+
+	if (*nbufs == 0U || *nbufs > MAX_BUFFER_NUM)
+		*nbufs = MAX_BUFFER_NUM;
+	if (sizeimage * *nbufs > VID_LIMIT_BYTES)
+		*nbufs = VID_LIMIT_BYTES / sizeimage;
+
+	/*
+	 * Called from VIDIOC_REQBUFS or in compatibility mode For YUV422P
+	 * format, even if there are 3 planes Y, U and V, we reply there is only
+	 * one plane, containing Y, U and V data, one after the other.
+	 */
+	if (*num_planes != 0U)
+		return sizes[0] < sizeimage ? -EINVAL : 0;
+	sizes[0] = sizeimage;
+	*num_planes = 1;
+	return 0;
+}
+
+static int mtk_mipicsi_vb2_init(struct vb2_buffer *vb)
+{
+	struct mtk_mipicsi_dev *mipicsi = vb2_get_drv_priv(vb->vb2_queue);
+
+	mipicsi->cam_buf[vb->index].prepare_flag = 0;
+
+	return 0;
+}
+
+static int mtk_mipicsi_vb2_prepare(struct vb2_buffer *vb)
+{
+	struct soc_camera_device *icd = NULL;
+	struct soc_camera_host *ici = NULL;
+	struct mtk_mipicsi_dev *mipicsi = NULL;
+	struct mtk_mipicsi_buf *buf;
+	u32 size = 0;
+	char *va = NULL;
+
+	/* notice that vb->vb2_queue addr equals to soc_camera_device->vb2_vidq.
+	 *  It was handled in reqbufs
+	 */
+	icd = soc_camera_from_vb2q(vb->vb2_queue);
+	ici = to_soc_camera_host(icd->parent);
+	mipicsi = ici->priv;
+	buf = &mipicsi->cam_buf[vb->index];
+	size = icd->sizeimage;
+
+	if (vb2_plane_size(vb, 0) < size) {
+		dev_err(icd->parent, "data will not fit into plane (%lu < %u)",
+			vb2_plane_size(vb, 0), size);
+		return -EINVAL;
+	}
+
+	vb2_set_plane_payload(vb, 0, size);
+
+	if ((buf->prepare_flag) == 0) {
+		buf->prepare_flag = 1;
+#ifdef CONFIG_VB2_MEDIATEK_DMA_SG
+		buf->vb_dma_addr_phy =
+			mtk_dma_sg_plane_dma_addr(vb, 0);
+#else
+		buf->vb_dma_addr_phy =
+			vb2_dma_contig_plane_dma_addr(vb, 0);
+#endif
+		va = vb2_plane_vaddr(vb, 0);
+		buf->vb = vb;
+	}
+
+	return 0;
+}
+
+static void mtk_mipicsi_vb2_queue(struct vb2_buffer *vb)
+{
+	struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
+	struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
+	struct mtk_mipicsi_dev *mipicsi = ici->priv;
+	char *va = NULL;
+
+	spin_lock(&mipicsi->queue_lock);
+	list_add_tail(&(mipicsi->cam_buf[vb->index].queue),
+		&(mipicsi->fb_list));
+	spin_unlock(&mipicsi->queue_lock);
+
+	va = vb2_plane_vaddr(vb, 0);
+
+	++(mipicsi->enqueue_cnt);
+}
+
+static int mtk_mipicsi_vb2_start_streaming(struct vb2_queue *vq,
+		unsigned int count)
+{
+	struct soc_camera_device *icd = soc_camera_from_vb2q(vq);
+	struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
+	struct mtk_mipicsi_dev *mipicsi = ici->priv;
+
+	icd->vdev->queue = vq;
+
+	mipicsi->streamon = true;
+	return 0;
+}
+
+static void mtk_mipicsi_vb2_stop_streaming(struct vb2_queue *vq)
+{
+	struct mtk_mipicsi_dev *mipicsi = vb2_get_drv_priv(vq);
+	struct mtk_mipicsi_buf *buf = NULL;
+	struct mtk_mipicsi_buf *tmp = NULL;
+	unsigned int index = 0;
+
+	spin_lock(&mipicsi->queue_lock);
+	while (list_empty(&(mipicsi->fb_list)) == 0) {
+		list_for_each_entry_safe(buf, tmp, &(mipicsi->fb_list), queue) {
+			if (buf->vb->state == VB2_BUF_STATE_ACTIVE) {
+				vb2_buffer_done(buf->vb, VB2_BUF_STATE_ERROR);
+				break;
+			}
+		}
+		buf->vb_dma_addr_phy = 0ULL;
+		buf->prepare_flag = 0;
+		index = buf->vb->index;
+		list_del_init(&(mipicsi->cam_buf[index].queue));
+	}
+	spin_unlock(&mipicsi->queue_lock);
+	mipicsi->streamon = false;
+
+	INIT_LIST_HEAD(&(mipicsi->fb_list));
+
+	mipicsi->enqueue_cnt = 0UL;
+	mipicsi->dequeue_cnt = 0UL;
+}
+
+static struct vb2_ops mtk_vb2_ops = {
+	.queue_setup		= mtk_mipicsi_vb2_queue_setup,
+	.buf_init			= mtk_mipicsi_vb2_init,
+	.buf_prepare		= mtk_mipicsi_vb2_prepare,
+	.buf_queue			= mtk_mipicsi_vb2_queue,
+	.start_streaming	= mtk_mipicsi_vb2_start_streaming,
+	.stop_streaming		= mtk_mipicsi_vb2_stop_streaming,
+	.wait_prepare		= vb2_ops_wait_prepare,
+	.wait_finish		= vb2_ops_wait_finish,
+};
+
+static int mtk_mipicsi_init_videobuf2(struct vb2_queue *q,
+			      struct soc_camera_device *icd)
+{
+	struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
+	struct mtk_mipicsi_dev *mipicsi = ici->priv;
+	struct mutex *q_lock = NULL;
+
+	q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+	q->io_modes = VB2_MMAP;
+	q->drv_priv = mipicsi;
+	q->buf_struct_size = sizeof(struct vb2_buffer);
+	q->ops = &mtk_vb2_ops;
+#ifdef CONFIG_VB2_MEDIATEK_DMA_SG
+	q->mem_ops = &mtk_dma_sg_memops;
+#else
+	q->mem_ops = &vb2_dma_contig_memops;
+#endif
+	q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
+	q->dev = ici->v4l2_dev.dev;
+	q_lock = devm_kzalloc(mipicsi->soc_host.v4l2_dev.dev,
+			sizeof(*q_lock), GFP_KERNEL);
+	q->lock = q_lock;
+	mutex_init(q->lock);
+
+	return vb2_queue_init(q);
+}
+
+static int mtk_mipicsi_querycap(struct soc_camera_host *ici,
+			       struct v4l2_capability *cap)
+{
+	struct mtk_mipicsi_dev *mipicsi = ici->priv;
+
+	(void)strlcpy(cap->card, MTK_PLATFORM_STR, sizeof(cap->card));
+	(void)strlcpy(cap->driver, mipicsi->drv_name, sizeof(cap->driver));
+	(void)strlcpy(cap->bus_info, MTK_PLATFORM_STR, sizeof(cap->bus_info));
+	cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
+	cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
+
+	return 0;
+}
+
+static int mtk_mipicsi_set_bus_param(struct soc_camera_device *icd)
+{
+	struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
+	struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,};
+	unsigned int common_flags = 0U;
+	int ret = 0;
+
+	ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg);
+	if (ret == 0) {
+		common_flags = soc_mbus_config_compatible(&cfg,
+				MTK_MIPICSI_BUS_PARAM);
+		if (common_flags == 0U) {
+			dev_err(icd->parent, "Flags incompatible: camera 0x%x",
+				cfg.flags);
+			return -EINVAL;
+		}
+	} else {
+		if (ret != -ENOIOCTLCMD)
+			return ret;
+	}
+	common_flags = MTK_MIPICSI_BUS_PARAM;
+
+	dev_dbg(icd->parent, "Flags cam: 0x%x common: 0x%x\n",
+		cfg.flags, common_flags);
+
+	cfg.flags = common_flags;
+	ret = v4l2_subdev_call(sd, video, s_mbus_config, &cfg);
+	if (ret < 0 && ret != -ENOIOCTLCMD) {
+		dev_dbg(icd->parent, "camera s_mbus_config(0x%x) returned %d\n",
+			common_flags, ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static struct soc_camera_host_ops mtk_soc_camera_host_ops = {
+	.owner			= THIS_MODULE,
+	.add			= mtk_mipicsi_add_device,
+	.remove			= mtk_mipicsi_remove_device,
+	.set_fmt		= mtk_mipicsi_set_fmt,
+	.try_fmt		= mtk_mipicsi_try_fmt,
+	.init_videobuf2	= mtk_mipicsi_init_videobuf2,
+	.poll			= vb2_fop_poll,
+	.querycap		= mtk_mipicsi_querycap,
+	.set_bus_param		= mtk_mipicsi_set_bus_param,
+};
+
+static int seninf_mux_camsv_node_parse(struct mtk_mipicsi_dev *mipicsi,
+		int index)
+{
+	struct clk *clk = NULL;
+	struct device *dev = NULL;
+	struct resource *res = NULL;
+	struct platform_device *camdma_pdev = NULL;
+	struct platform_device *pdev = NULL;
+	struct device_node *np = NULL;
+
+	if (mipicsi == NULL)
+		return -EINVAL;
+
+	dev = &mipicsi->pdev->dev;
+	pdev = mipicsi->pdev;
+
+	np = of_parse_phandle(dev->of_node,
+		"mediatek,seninf_mux_camsv", index);
+	if (np == NULL) {
+		dev_err(dev, "no NO.%d mediatek,seninf_mux_camsv node\n",
+			index);
+		return -ENODEV;
+	}
+
+	camdma_pdev = of_find_device_by_node(np);
+	of_node_put(np);
+	if (camdma_pdev == NULL) {
+		camdma_pdev = of_platform_device_create(np, NULL,
+					platform_bus_type.dev_root);
+		if (camdma_pdev == NULL)
+			return -EPROBE_DEFER;
+	}
+
+	clk = of_clk_get(np, 0);
+	if (clk == NULL) {
+		dev_err(dev, "get clk fail in %s node\n", np->full_name);
+		return -ENODEV;
+	}
+	mipicsi->clk[index] = clk;
+
+	res = platform_get_resource(camdma_pdev, IORESOURCE_MEM, 0);
+	if (res == NULL) {
+		dev_err(dev, "get seninf_mux memory failed in %s node\n",
+			np->full_name);
+		return -ENODEV;
+	}
+	mipicsi->seninf_mux[index] =
+		devm_ioremap_resource(&camdma_pdev->dev, res);
+
+	res = platform_get_resource(camdma_pdev, IORESOURCE_MEM, 1);
+	if (res == NULL) {
+		dev_err(dev, "get camsv memory failed in %s node\n",
+			np->full_name);
+		return -ENODEV;
+	}
+	mipicsi->camsv[index] =
+		devm_ioremap_resource(&camdma_pdev->dev, res);
+
+	INIT_LIST_HEAD(&mipicsi->capture_list[index]);
+	mipicsi->frame_cnt[index] = 0UL;
+
+	dev_info(dev, "%s parse done\n", np->full_name);
+
+	return 0;
+}
+
+static int mtk_mipicsi_common_node_parse(struct mtk_mipicsi_dev *mipicsi,
+	struct device_node *node)
+{
+	int i = 0;
+	struct regmap *seninf_top = NULL;
+	struct device *dev = NULL;
+	struct platform_device *pdev = NULL;
+	struct clk *clk = NULL;
+
+	if ((mipicsi == NULL) || (node == NULL))
+		return -EINVAL;
+
+	dev = &mipicsi->pdev->dev;
+	pdev = mipicsi->pdev;
+
+	/* All the mipicsi HW share the same seninf_top */
+	seninf_top = syscon_regmap_lookup_by_phandle(dev->of_node,
+			"mediatek,mipicsi");
+	if (seninf_top == NULL) {
+		dev_err(dev, "Missing mediadek,mipicsi in %s node\n",
+			node->full_name);
+		return -EINVAL;
+	}
+	mipicsi->seninf_top = seninf_top;
+
+	/* get IMG_SENINF_CAM_EN and IMG_SENINF_SCAM_EN clk*/
+	mipicsi->clk_num = mipicsi->camsv_num;
+
+	for (i = 0; i < MIPICSI_COMMON_CLK; ++i) {
+		clk = of_clk_get(node, i);
+		if (clk == NULL) {
+			dev_err(dev, "get clk fail in %s node\n",
+				node->full_name);
+			return -EINVAL;
+		}
+		mipicsi->clk[mipicsi->clk_num] = clk;
+		++mipicsi->clk_num;
+	}
+
+	dev_info(dev, "%s parse done\n", node->full_name);
+
+	return 0;
+}
+
+static int mtk_mipicsi_node_parse(struct mtk_mipicsi_dev *mipicsi)
+{
+	int ret;
+	int camsv_num = 0;
+	int i;
+	struct device *dev = NULL;
+	struct resource *res = NULL;
+	struct device_node *common_node = NULL;
+	struct platform_device *pdev = NULL;
+
+	if (mipicsi == NULL)
+		return -EINVAL;
+
+	dev = &mipicsi->pdev->dev;
+	pdev = mipicsi->pdev;
+
+	/* mediatek,mipicsiid is a flag to show which mipicsi HW */
+	ret = of_property_read_u32(dev->of_node, "mediatek,mipicsiid",
+		(u32 *)&mipicsi->id);
+	if (ret != 0) {
+		dev_info(dev, "not set mediatek,mipicsiid, use default id 0\n");
+		mipicsi->id = 0;
+	}
+	(void)sprintf(mipicsi->drv_name, MTK_MIPICSI_DRV_NAME"%d",
+		mipicsi->id);
+
+	/* get and parse seninf_mux_camsv */
+	camsv_num = of_count_phandle_with_args(dev->of_node,
+		"mediatek,seninf_mux_camsv", NULL);
+	if (camsv_num <= 0) {
+		dev_err(dev, "no mediatek,seninf_mux_camsv\n");
+		return -EINVAL;
+	}
+	mipicsi->camsv_num = camsv_num;
+	dev_info(dev, "there are %d camsv node\n", camsv_num);
+
+	for (i = 0; i < mipicsi->camsv_num; ++i) {
+		ret = seninf_mux_camsv_node_parse(mipicsi, i);
+		if ((ret < 0) && (ret != -EPROBE_DEFER)) {
+			dev_err(dev,
+				"NO.%d seninf_mux_camsv node parse fail\n", i);
+			return ret;
+		}
+	}
+
+	/* get mediatek,mipicsi node and its resource */
+	common_node = of_parse_phandle(dev->of_node, "mediatek,mipicsi", 0);
+	if (common_node == NULL) {
+		dev_err(dev, "no mediadek,mipicsi\n");
+		return -EINVAL;
+	}
+
+	ret = mtk_mipicsi_common_node_parse(mipicsi, common_node);
+	if (ret < 0)
+		return ret;
+
+	/*get ana and seninf reg*/
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (res == NULL) {
+		dev_err(dev, "get ana register failed\n");
+		return -ENODEV;
+	}
+	mipicsi->ana = devm_ioremap_resource(&pdev->dev, res);
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+	if (res == NULL) {
+		dev_err(dev, "get seninf_ctrl register failed\n");
+		return -ENODEV;
+	}
+	mipicsi->seninf_ctrl = devm_ioremap_resource(&pdev->dev, res);
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
+	if (res == NULL) {
+		dev_err(dev, "get seninf register failed\n");
+		return -ENODEV;
+	}
+	mipicsi->seninf = devm_ioremap_resource(&pdev->dev, res);
+
+	dev_info(dev, "mipicsi node parse done\n");
+
+	return 0;
+}
+
+static int mtk_mipicsi_probe(struct platform_device *pdev)
+{
+	struct mtk_mipicsi_dev *mipicsi = NULL;
+	int ret = 0;
+	struct iommu_domain *iommu = NULL;
+	struct device_node *larb_node = NULL;
+	struct platform_device *larb_pdev = NULL;
+
+	iommu = iommu_get_domain_for_dev(&pdev->dev);
+	if (iommu == NULL) {
+		dev_err(&pdev->dev, "Waiting iommu driver ready...\n");
+		return -EPROBE_DEFER;
+	}
+
+	larb_node = of_parse_phandle(pdev->dev.of_node, "mediatek,larb", 0);
+	if (larb_node == NULL) {
+		dev_err(&pdev->dev, "Missing mediadek,larb in %s node\n",
+			pdev->dev.of_node->full_name);
+		return -EINVAL;
+	}
+
+	larb_pdev = of_find_device_by_node(larb_node);
+	if (larb_pdev == NULL || !larb_pdev->dev.driver) {
+		dev_err(&pdev->dev, "Waiting for larb device %s\n",
+			larb_node->full_name);
+		return -EPROBE_DEFER;
+	}
+	of_node_put(larb_node);
+
+	mipicsi = devm_kzalloc(&pdev->dev, sizeof(*mipicsi), GFP_KERNEL);
+	if (mipicsi == NULL)
+		return -ENOMEM;
+
+	mipicsi->pdev = pdev;
+	mipicsi->larb_pdev = &larb_pdev->dev;
+
+	ret = mtk_mipicsi_node_parse(mipicsi);
+	if (ret < 0)
+		return ret;
+
+	pm_runtime_enable(&pdev->dev);
+
+	mipicsi->soc_host.drv_name	= mipicsi->drv_name;
+	mipicsi->soc_host.ops		= &mtk_soc_camera_host_ops;
+	mipicsi->soc_host.priv		= mipicsi;
+	mipicsi->soc_host.v4l2_dev.dev	= &pdev->dev;
+	mipicsi->soc_host.nr		= mipicsi->id;
+	mipicsi->width_flags		= MTK_DATAWIDTH_8;
+	mipicsi->streamon		= false;
+
+	ret = soc_camera_host_register(&mipicsi->soc_host);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "soc camera host register fail\n");
+		pm_runtime_disable(&pdev->dev);
+		return ret;
+	}
+
+	INIT_LIST_HEAD(&mipicsi->fb_list);
+	spin_lock_init(&mipicsi->queue_lock);
+	spin_lock_init(&mipicsi->lock);
+	mipicsi->enqueue_cnt = 0UL;
+	mipicsi->dequeue_cnt = 0UL;
+
+#ifdef CONFIG_VB2_MEDIATEK_DMA_SG
+	ret = mtk_dma_sg_init_ctx(&pdev->dev);
+#else
+	ret = vb2_dma_contig_set_max_seg_size(&pdev->dev, DMA_BIT_MASK(32U));
+#endif
+	if (ret != 0) {
+		dev_err(&pdev->dev, "dma set max seg size fail\n");
+		goto clean;
+	}
+
+	dev_info(&pdev->dev, "probe done\n");
+	return ret;
+clean:
+	soc_camera_host_unregister(&mipicsi->soc_host);
+	pm_runtime_disable(&pdev->dev);
+	return ret;
+}
+
+static int mtk_mipicsi_remove(struct platform_device *pdev)
+{
+	struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev);
+
+	soc_camera_host_unregister(soc_host);
+	pm_runtime_disable(&pdev->dev);
+
+	return 0;
+}
+
+static const struct of_device_id mtk_mipicsi_of_match[] = {
+	{ .compatible = "mediatek,mt2712-mipicsi", },
+	{},
+};
+
+static struct platform_driver mtk_mipicsi_driver = {
+	.driver		= {
+		.name	= MTK_MIPICSI_DRV_NAME,
+		.of_match_table = of_match_ptr(mtk_mipicsi_of_match),
+	},
+	.probe		= mtk_mipicsi_probe,
+	.remove		= mtk_mipicsi_remove,
+};
+
+module_platform_driver(mtk_mipicsi_driver);
+MODULE_DESCRIPTION("MediaTek SoC Camera Host driver");
+MODULE_LICENSE("GPL v2");
-- 
2.18.0

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