tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
1/*
2 * ispvideo.h
3 *
4 * TI OMAP3 ISP - Generic video node
5 *
6 * Copyright (C) 2009-2010 Nokia Corporation
7 *
8 * Contacts: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
9 * Sakari Ailus <sakari.ailus@iki.fi>
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
14 *
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
23 * 02110-1301 USA
24 */
25
26#ifndef OMAP3_ISP_VIDEO_H
27#define OMAP3_ISP_VIDEO_H
28
29#include <linux/v4l2-mediabus.h>
30#include <media/media-entity.h>
31#include <media/v4l2-dev.h>
32#include <media/v4l2-fh.h>
33
34#include "ispqueue.h"
35
36#define ISP_VIDEO_DRIVER_NAME "ispvideo"
37#define ISP_VIDEO_DRIVER_VERSION "0.0.2"
38
39struct isp_device;
40struct isp_video;
41struct v4l2_mbus_framefmt;
42struct v4l2_pix_format;
43
44/*
45 * struct isp_format_info - ISP media bus format information
46 * @code: V4L2 media bus format code
47 * @truncated: V4L2 media bus format code for the same format truncated to 10
48 * bits. Identical to @code if the format is 10 bits wide or less.
49 * @uncompressed: V4L2 media bus format code for the corresponding uncompressed
50 * format. Identical to @code if the format is not DPCM compressed.
51 * @flavor: V4L2 media bus format code for the same pixel layout but
52 * shifted to be 8 bits per pixel. =0 if format is not shiftable.
53 * @pixelformat: V4L2 pixel format FCC identifier
54 * @width: Bits per pixel (when transferred over a bus)
55 * @bpp: Bytes per pixel (when stored in memory)
56 */
57struct isp_format_info {
58 enum v4l2_mbus_pixelcode code;
59 enum v4l2_mbus_pixelcode truncated;
60 enum v4l2_mbus_pixelcode uncompressed;
61 enum v4l2_mbus_pixelcode flavor;
62 u32 pixelformat;
63 unsigned int width;
64 unsigned int bpp;
65};
66
67enum isp_pipeline_stream_state {
68 ISP_PIPELINE_STREAM_STOPPED = 0,
69 ISP_PIPELINE_STREAM_CONTINUOUS = 1,
70 ISP_PIPELINE_STREAM_SINGLESHOT = 2,
71};
72
73enum isp_pipeline_state {
74 /* The stream has been started on the input video node. */
75 ISP_PIPELINE_STREAM_INPUT = 1,
76 /* The stream has been started on the output video node. */
77 ISP_PIPELINE_STREAM_OUTPUT = 2,
78 /* At least one buffer is queued on the input video node. */
79 ISP_PIPELINE_QUEUE_INPUT = 4,
80 /* At least one buffer is queued on the output video node. */
81 ISP_PIPELINE_QUEUE_OUTPUT = 8,
82 /* The input entity is idle, ready to be started. */
83 ISP_PIPELINE_IDLE_INPUT = 16,
84 /* The output entity is idle, ready to be started. */
85 ISP_PIPELINE_IDLE_OUTPUT = 32,
86 /* The pipeline is currently streaming. */
87 ISP_PIPELINE_STREAM = 64,
88};
89
90/*
91 * struct isp_pipeline - An ISP hardware pipeline
92 * @error: A hardware error occurred during capture
93 * @entities: Bitmask of entities in the pipeline (indexed by entity ID)
94 */
95struct isp_pipeline {
96 struct media_pipeline pipe;
97 spinlock_t lock; /* Pipeline state and queue flags */
98 unsigned int state;
99 enum isp_pipeline_stream_state stream_state;
100 struct isp_video *input;
101 struct isp_video *output;
102 u32 entities;
103 unsigned long l3_ick;
104 unsigned int max_rate;
105 atomic_t frame_number;
106 bool do_propagation; /* of frame number */
107 bool error;
108 struct v4l2_fract max_timeperframe;
109 struct v4l2_subdev *external;
110 unsigned int external_rate;
111 unsigned int external_width;
112};
113
114#define to_isp_pipeline(__e) \
115 container_of((__e)->pipe, struct isp_pipeline, pipe)
116
117static inline int isp_pipeline_ready(struct isp_pipeline *pipe)
118{
119 return pipe->state == (ISP_PIPELINE_STREAM_INPUT |
120 ISP_PIPELINE_STREAM_OUTPUT |
121 ISP_PIPELINE_QUEUE_INPUT |
122 ISP_PIPELINE_QUEUE_OUTPUT |
123 ISP_PIPELINE_IDLE_INPUT |
124 ISP_PIPELINE_IDLE_OUTPUT);
125}
126
127/*
128 * struct isp_buffer - ISP buffer
129 * @buffer: ISP video buffer
130 * @isp_addr: MMU mapped address (a.k.a. device address) of the buffer.
131 */
132struct isp_buffer {
133 struct isp_video_buffer buffer;
134 dma_addr_t isp_addr;
135};
136
137#define to_isp_buffer(buf) container_of(buf, struct isp_buffer, buffer)
138
139enum isp_video_dmaqueue_flags {
140 /* Set if DMA queue becomes empty when ISP_PIPELINE_STREAM_CONTINUOUS */
141 ISP_VIDEO_DMAQUEUE_UNDERRUN = (1 << 0),
142 /* Set when queuing buffer to an empty DMA queue */
143 ISP_VIDEO_DMAQUEUE_QUEUED = (1 << 1),
144};
145
146#define isp_video_dmaqueue_flags_clr(video) \
147 ({ (video)->dmaqueue_flags = 0; })
148
149/*
150 * struct isp_video_operations - ISP video operations
151 * @queue: Resume streaming when a buffer is queued. Called on VIDIOC_QBUF
152 * if there was no buffer previously queued.
153 */
154struct isp_video_operations {
155 int(*queue)(struct isp_video *video, struct isp_buffer *buffer);
156};
157
158struct isp_video {
159 struct video_device video;
160 enum v4l2_buf_type type;
161 struct media_pad pad;
162
163 struct mutex mutex; /* format and crop settings */
164 atomic_t active;
165
166 struct isp_device *isp;
167
168 unsigned int capture_mem;
169 unsigned int bpl_alignment; /* alignment value */
170 unsigned int bpl_zero_padding; /* whether the alignment is optional */
171 unsigned int bpl_max; /* maximum bytes per line value */
172 unsigned int bpl_value; /* bytes per line value */
173 unsigned int bpl_padding; /* padding at end of line */
174
175 /* Entity video node streaming */
176 unsigned int streaming:1;
177
178 /* Pipeline state */
179 struct isp_pipeline pipe;
180 struct mutex stream_lock; /* pipeline and stream states */
181
182 /* Video buffers queue */
183 struct isp_video_queue *queue;
184 struct list_head dmaqueue;
185 enum isp_video_dmaqueue_flags dmaqueue_flags;
186
187 const struct isp_video_operations *ops;
188};
189
190#define to_isp_video(vdev) container_of(vdev, struct isp_video, video)
191
192struct isp_video_fh {
193 struct v4l2_fh vfh;
194 struct isp_video *video;
195 struct isp_video_queue queue;
196 struct v4l2_format format;
197 struct v4l2_fract timeperframe;
198};
199
200#define to_isp_video_fh(fh) container_of(fh, struct isp_video_fh, vfh)
201#define isp_video_queue_to_isp_video_fh(q) \
202 container_of(q, struct isp_video_fh, queue)
203
204int omap3isp_video_init(struct isp_video *video, const char *name);
205void omap3isp_video_cleanup(struct isp_video *video);
206int omap3isp_video_register(struct isp_video *video,
207 struct v4l2_device *vdev);
208void omap3isp_video_unregister(struct isp_video *video);
209struct isp_buffer *omap3isp_video_buffer_next(struct isp_video *video);
210void omap3isp_video_resume(struct isp_video *video, int continuous);
211struct media_pad *omap3isp_video_remote_pad(struct isp_video *video);
212
213const struct isp_format_info *
214omap3isp_video_format_info(enum v4l2_mbus_pixelcode code);
215
216#endif /* OMAP3_ISP_VIDEO_H */