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The workqueue "workqueue" is involved in transmitting hdpvr buffers. It has a single work item(&dev->worker) and hence doesn't require ordering. Also, it is not being used on a memory reclaim path. Hence, the singlethreaded workqueue has been replaced with the use of system_wq. System workqueues have been able to handle high level of concurrency for a long time now and hence it's not required to have a singlethreaded workqueue just to gain concurrency. Unlike a dedicated per-cpu workqueue created with create_singlethread_workqueue(), system_wq allows multiple work items to overlap executions even on the same CPU; however, a per-cpu workqueue doesn't have any CPU locality or global ordering guarantee unless the target CPU is explicitly specified and thus the increase of local concurrency shouldn't make any difference. Work item has been flushed in hdpvr_device_release() to ensure that there are no pending tasks while disconnecting the driver. Signed-off-by: Bhaktipriya Shridhar <bhaktipriya96@gmail.com> Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
330 lines
7.7 KiB
C
330 lines
7.7 KiB
C
/*
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* Hauppauge HD PVR USB driver
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*
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* Copyright (C) 2008 Janne Grunau (j@jannau.net)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation, version 2.
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*
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*/
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#include <linux/usb.h>
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#include <linux/i2c.h>
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#include <linux/mutex.h>
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#include <linux/workqueue.h>
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#include <linux/videodev2.h>
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#include <media/v4l2-device.h>
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#include <media/v4l2-ctrls.h>
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#include <media/i2c/ir-kbd-i2c.h>
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#define HDPVR_MAX 8
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#define HDPVR_I2C_MAX_SIZE 128
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/* Define these values to match your devices */
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#define HD_PVR_VENDOR_ID 0x2040
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#define HD_PVR_PRODUCT_ID 0x4900
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#define HD_PVR_PRODUCT_ID1 0x4901
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#define HD_PVR_PRODUCT_ID2 0x4902
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#define HD_PVR_PRODUCT_ID4 0x4903
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#define HD_PVR_PRODUCT_ID3 0x4982
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#define UNSET (-1U)
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#define NUM_BUFFERS 64
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#define HDPVR_FIRMWARE_VERSION 0x08
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#define HDPVR_FIRMWARE_VERSION_AC3 0x0d
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#define HDPVR_FIRMWARE_VERSION_0X12 0x12
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#define HDPVR_FIRMWARE_VERSION_0X15 0x15
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#define HDPVR_FIRMWARE_VERSION_0X1E 0x1e
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/* #define HDPVR_DEBUG */
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extern int hdpvr_debug;
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#define MSG_INFO 1
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#define MSG_BUFFER 2
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struct hdpvr_options {
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u8 video_std;
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u8 video_input;
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u8 audio_input;
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u8 bitrate; /* in 100kbps */
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u8 peak_bitrate; /* in 100kbps */
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u8 bitrate_mode;
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u8 gop_mode;
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enum v4l2_mpeg_audio_encoding audio_codec;
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u8 brightness;
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u8 contrast;
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u8 hue;
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u8 saturation;
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u8 sharpness;
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};
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/* Structure to hold all of our device specific stuff */
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struct hdpvr_device {
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/* the v4l device for this device */
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struct video_device video_dev;
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/* the control handler for this device */
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struct v4l2_ctrl_handler hdl;
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/* the usb device for this device */
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struct usb_device *udev;
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/* v4l2-device unused */
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struct v4l2_device v4l2_dev;
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struct { /* video mode/bitrate control cluster */
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struct v4l2_ctrl *video_mode;
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struct v4l2_ctrl *video_bitrate;
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struct v4l2_ctrl *video_bitrate_peak;
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};
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/* v4l2 format */
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uint width, height;
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/* the max packet size of the bulk endpoint */
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size_t bulk_in_size;
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/* the address of the bulk in endpoint */
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__u8 bulk_in_endpointAddr;
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/* holds the current device status */
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__u8 status;
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/* holds the current set options */
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struct hdpvr_options options;
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v4l2_std_id cur_std;
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struct v4l2_dv_timings cur_dv_timings;
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uint flags;
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/* synchronize I/O */
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struct mutex io_mutex;
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/* available buffers */
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struct list_head free_buff_list;
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/* in progress buffers */
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struct list_head rec_buff_list;
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/* waitqueue for buffers */
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wait_queue_head_t wait_buffer;
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/* waitqueue for data */
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wait_queue_head_t wait_data;
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/**/
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struct work_struct worker;
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/* current stream owner */
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struct v4l2_fh *owner;
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/* I2C adapter */
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struct i2c_adapter i2c_adapter;
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/* I2C lock */
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struct mutex i2c_mutex;
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/* I2C message buffer space */
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char i2c_buf[HDPVR_I2C_MAX_SIZE];
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/* For passing data to ir-kbd-i2c */
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struct IR_i2c_init_data ir_i2c_init_data;
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/* usb control transfer buffer and lock */
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struct mutex usbc_mutex;
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u8 *usbc_buf;
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u8 fw_ver;
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};
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static inline struct hdpvr_device *to_hdpvr_dev(struct v4l2_device *v4l2_dev)
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{
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return container_of(v4l2_dev, struct hdpvr_device, v4l2_dev);
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}
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/* buffer one bulk urb of data */
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struct hdpvr_buffer {
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struct list_head buff_list;
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struct urb *urb;
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struct hdpvr_device *dev;
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uint pos;
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__u8 status;
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};
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/* */
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struct hdpvr_video_info {
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u16 width;
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u16 height;
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u8 fps;
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bool valid;
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};
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enum {
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STATUS_UNINITIALIZED = 0,
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STATUS_IDLE,
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STATUS_STARTING,
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STATUS_SHUTTING_DOWN,
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STATUS_STREAMING,
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STATUS_ERROR,
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STATUS_DISCONNECTED,
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};
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enum {
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HDPVR_FLAG_AC3_CAP = 1,
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};
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enum {
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BUFSTAT_UNINITIALIZED = 0,
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BUFSTAT_AVAILABLE,
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BUFSTAT_INPROGRESS,
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BUFSTAT_READY,
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};
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#define CTRL_START_STREAMING_VALUE 0x0700
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#define CTRL_STOP_STREAMING_VALUE 0x0800
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#define CTRL_BITRATE_VALUE 0x1000
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#define CTRL_BITRATE_MODE_VALUE 0x1200
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#define CTRL_GOP_MODE_VALUE 0x1300
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#define CTRL_VIDEO_INPUT_VALUE 0x1500
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#define CTRL_VIDEO_STD_TYPE 0x1700
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#define CTRL_AUDIO_INPUT_VALUE 0x2500
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#define CTRL_BRIGHTNESS 0x2900
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#define CTRL_CONTRAST 0x2a00
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#define CTRL_HUE 0x2b00
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#define CTRL_SATURATION 0x2c00
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#define CTRL_SHARPNESS 0x2d00
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#define CTRL_LOW_PASS_FILTER_VALUE 0x3100
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#define CTRL_DEFAULT_INDEX 0x0003
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/* :0 s 38 01 1000 0003 0004 4 = 0a00ca00
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* BITRATE SETTING
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* 1st and 2nd byte (little endian): average bitrate in 100 000 bit/s
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* min: 1 mbit/s, max: 13.5 mbit/s
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* 3rd and 4th byte (little endian): peak bitrate in 100 000 bit/s
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* min: average + 100kbit/s,
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* max: 20.2 mbit/s
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*/
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/* :0 s 38 01 1200 0003 0001 1 = 02
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* BIT RATE MODE
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* constant = 1, variable (peak) = 2, variable (average) = 3
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*/
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/* :0 s 38 01 1300 0003 0001 1 = 03
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* GOP MODE (2 bit)
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* low bit 0/1: advanced/simple GOP
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* high bit 0/1: IDR(4/32/128) / no IDR (4/32/0)
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*/
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/* :0 s 38 01 1700 0003 0001 1 = 00
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* VIDEO STANDARD or FREQUNCY 0 = 60hz, 1 = 50hz
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*/
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/* :0 s 38 01 3100 0003 0004 4 = 03030000
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* FILTER CONTROL
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* 1st byte luma low pass filter strength,
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* 2nd byte chroma low pass filter strength,
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* 3rd byte MF enable chroma, min=0, max=1
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* 4th byte n
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*/
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/* :0 s 38 b9 0001 0000 0000 0 */
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/* :0 s 38 d3 0000 0000 0001 1 = 00 */
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/* ret = usb_control_msg(dev->udev, */
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/* usb_sndctrlpipe(dev->udev, 0), */
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/* 0xd3, 0x38, */
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/* 0, 0, */
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/* "\0", 1, */
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/* 1000); */
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/* info("control request returned %d", ret); */
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/* msleep(5000); */
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/* :0 s b8 81 1400 0003 0005 5 <
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* :0 0 5 = d0024002 19
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* QUERY FRAME SIZE AND RATE
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* 1st and 2nd byte (little endian): horizontal resolution
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* 3rd and 4th byte (little endian): vertical resolution
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* 5th byte: frame rate
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*/
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/* :0 s b8 81 1800 0003 0003 3 <
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* :0 0 3 = 030104
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* QUERY SIGNAL AND DETECTED LINES, maybe INPUT
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*/
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enum hdpvr_video_std {
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HDPVR_60HZ = 0,
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HDPVR_50HZ,
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};
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enum hdpvr_video_input {
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HDPVR_COMPONENT = 0,
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HDPVR_SVIDEO,
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HDPVR_COMPOSITE,
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HDPVR_VIDEO_INPUTS
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};
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enum hdpvr_audio_inputs {
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HDPVR_RCA_BACK = 0,
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HDPVR_RCA_FRONT,
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HDPVR_SPDIF,
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HDPVR_AUDIO_INPUTS
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};
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enum hdpvr_bitrate_mode {
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HDPVR_CONSTANT = 1,
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HDPVR_VARIABLE_PEAK,
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HDPVR_VARIABLE_AVERAGE,
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};
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enum hdpvr_gop_mode {
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HDPVR_ADVANCED_IDR_GOP = 0,
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HDPVR_SIMPLE_IDR_GOP,
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HDPVR_ADVANCED_NOIDR_GOP,
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HDPVR_SIMPLE_NOIDR_GOP,
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};
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void hdpvr_delete(struct hdpvr_device *dev);
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/*========================================================================*/
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/* hardware control functions */
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int hdpvr_set_options(struct hdpvr_device *dev);
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int hdpvr_set_bitrate(struct hdpvr_device *dev);
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int hdpvr_set_audio(struct hdpvr_device *dev, u8 input,
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enum v4l2_mpeg_audio_encoding codec);
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int hdpvr_config_call(struct hdpvr_device *dev, uint value,
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unsigned char valbuf);
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int get_video_info(struct hdpvr_device *dev, struct hdpvr_video_info *vid_info);
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/* :0 s b8 81 1800 0003 0003 3 < */
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/* :0 0 3 = 0301ff */
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int get_input_lines_info(struct hdpvr_device *dev);
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/*========================================================================*/
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/* v4l2 registration */
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int hdpvr_register_videodev(struct hdpvr_device *dev, struct device *parent,
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int devnumber);
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int hdpvr_cancel_queue(struct hdpvr_device *dev);
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/*========================================================================*/
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/* i2c adapter registration */
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int hdpvr_register_i2c_adapter(struct hdpvr_device *dev);
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struct i2c_client *hdpvr_register_ir_rx_i2c(struct hdpvr_device *dev);
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struct i2c_client *hdpvr_register_ir_tx_i2c(struct hdpvr_device *dev);
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/*========================================================================*/
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/* buffer management */
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int hdpvr_free_buffers(struct hdpvr_device *dev);
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int hdpvr_alloc_buffers(struct hdpvr_device *dev, uint count);
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