Hi, Stu: On Tue, 2019-04-16 at 17:30 +0800, Stu Hsieh wrote: > 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@xxxxxxxxxxxx> > --- > drivers/media/platform/mtk-mipicsi/Makefile | 4 + > .../media/platform/mtk-mipicsi/mtk_mipicsi.c | 767 ++++++++++++++++++ > 2 files changed, 771 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..e26bebe17fe5 > --- /dev/null > +++ b/drivers/media/platform/mtk-mipicsi/mtk_mipicsi.c > @@ -0,0 +1,767 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* > + * Copyright (C) 2017 MediaTek Inc. > + * Author: Ricky Zhang <ricky.zhang@xxxxxxxxxxxx> > + * Baoyin Zhang <baoyin.zhang@xxxxxxxxxxxx> > + * Alan Yue <alan.yue@xxxxxxxxxxxx> > + * > + * 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; Separating register control to another patch looks strange to me. Register control is the bottom part and this patch is the top part. You send a top part first then the bottom part. 'seninf_ctrl' is useless in this patch, you may move this to the patch that use this variable or merge that patch into this patch. Regards, CK > + 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]; > +}; > +
