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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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83fba2c06f
The original drivers code to find a subdevice by looking in the DT grpah and how the callbacks to the v4l2 async bind framework where poorly written. The most obvious example of badness was the duplication of data in the struct rvin_graph_entity. This patch removes the data duplication, simplifies the parsing of the DT graph and add checks to the v4l2 callbacks. Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se> Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
166 lines
4.2 KiB
C
166 lines
4.2 KiB
C
/*
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* Driver for Renesas R-Car VIN
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*
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* Copyright (C) 2016 Renesas Electronics Corp.
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* Copyright (C) 2011-2013 Renesas Solutions Corp.
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* Copyright (C) 2013 Cogent Embedded, Inc., <source@cogentembedded.com>
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* Copyright (C) 2008 Magnus Damm
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*
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* Based on the soc-camera rcar_vin driver
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#ifndef __RCAR_VIN__
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#define __RCAR_VIN__
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#include <media/v4l2-async.h>
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#include <media/v4l2-ctrls.h>
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#include <media/v4l2-dev.h>
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#include <media/v4l2-device.h>
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#include <media/videobuf2-v4l2.h>
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/* Number of HW buffers */
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#define HW_BUFFER_NUM 3
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/* Address alignment mask for HW buffers */
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#define HW_BUFFER_MASK 0x7f
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enum chip_id {
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RCAR_H1,
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RCAR_M1,
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RCAR_GEN2,
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};
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/**
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* STOPPED - No operation in progress
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* RUNNING - Operation in progress have buffers
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* STALLED - No operation in progress have no buffers
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* STOPPING - Stopping operation
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*/
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enum rvin_dma_state {
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STOPPED = 0,
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RUNNING,
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STALLED,
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STOPPING,
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};
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/**
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* struct rvin_source_fmt - Source information
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* @code: Media bus format from source
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* @width: Width from source
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* @height: Height from source
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*/
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struct rvin_source_fmt {
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u32 code;
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u32 width;
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u32 height;
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};
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/**
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* struct rvin_video_format - Data format stored in memory
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* @fourcc: Pixelformat
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* @bpp: Bytes per pixel
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*/
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struct rvin_video_format {
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u32 fourcc;
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u8 bpp;
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};
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/**
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* struct rvin_graph_entity - Video endpoint from async framework
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* @asd: sub-device descriptor for async framework
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* @subdev: subdevice matched using async framework
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*/
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struct rvin_graph_entity {
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struct v4l2_async_subdev asd;
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struct v4l2_subdev *subdev;
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};
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/**
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* struct rvin_dev - Renesas VIN device structure
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* @dev: (OF) device
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* @base: device I/O register space remapped to virtual memory
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* @chip: type of VIN chip
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* @mbus_cfg media bus configuration
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*
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* @vdev: V4L2 video device associated with VIN
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* @v4l2_dev: V4L2 device
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* @src_pad_idx: source pad index for media controller drivers
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* @ctrl_handler: V4L2 control handler
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* @notifier: V4L2 asynchronous subdevs notifier
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* @digital: entity in the DT for local digital subdevice
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*
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* @lock: protects @queue
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* @queue: vb2 buffers queue
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*
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* @qlock: protects @queue_buf, @buf_list, @continuous, @sequence
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* @state
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* @queue_buf: Keeps track of buffers given to HW slot
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* @buf_list: list of queued buffers
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* @continuous: tracks if active operation is continuous or single mode
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* @sequence: V4L2 buffers sequence number
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* @state: keeps track of operation state
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*
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* @source: active format from the video source
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* @format: active V4L2 pixel format
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*
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* @crop: active cropping
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* @compose: active composing
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*/
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struct rvin_dev {
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struct device *dev;
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void __iomem *base;
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enum chip_id chip;
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struct v4l2_mbus_config mbus_cfg;
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struct video_device vdev;
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struct v4l2_device v4l2_dev;
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int src_pad_idx;
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struct v4l2_ctrl_handler ctrl_handler;
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struct v4l2_async_notifier notifier;
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struct rvin_graph_entity digital;
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struct mutex lock;
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struct vb2_queue queue;
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spinlock_t qlock;
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struct vb2_v4l2_buffer *queue_buf[HW_BUFFER_NUM];
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struct list_head buf_list;
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bool continuous;
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unsigned int sequence;
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enum rvin_dma_state state;
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struct rvin_source_fmt source;
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struct v4l2_pix_format format;
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struct v4l2_rect crop;
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struct v4l2_rect compose;
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};
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#define vin_to_source(vin) vin->digital.subdev
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/* Debug */
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#define vin_dbg(d, fmt, arg...) dev_dbg(d->dev, fmt, ##arg)
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#define vin_info(d, fmt, arg...) dev_info(d->dev, fmt, ##arg)
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#define vin_warn(d, fmt, arg...) dev_warn(d->dev, fmt, ##arg)
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#define vin_err(d, fmt, arg...) dev_err(d->dev, fmt, ##arg)
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int rvin_dma_probe(struct rvin_dev *vin, int irq);
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void rvin_dma_remove(struct rvin_dev *vin);
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int rvin_v4l2_probe(struct rvin_dev *vin);
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void rvin_v4l2_remove(struct rvin_dev *vin);
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const struct rvin_video_format *rvin_format_from_pixel(u32 pixelformat);
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/* Cropping, composing and scaling */
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void rvin_scale_try(struct rvin_dev *vin, struct v4l2_pix_format *pix,
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u32 width, u32 height);
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void rvin_crop_scale_comp(struct rvin_dev *vin);
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#endif
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