1 .. SPDX-License-Identifier: GPL-2.0 1 .. SPDX-License-Identifier: GPL-2.0
2 2
3 i.MX7 Video Capture Driver 3 i.MX7 Video Capture Driver
4 ========================== 4 ==========================
5 5
6 Introduction 6 Introduction
7 ------------ 7 ------------
8 8
9 The i.MX7 contrary to the i.MX5/6 family does 9 The i.MX7 contrary to the i.MX5/6 family does not contain an Image Processing
10 Unit (IPU); because of that the capabilities t 10 Unit (IPU); because of that the capabilities to perform operations or
11 manipulation of the capture frames are less fe 11 manipulation of the capture frames are less feature rich.
12 12
13 For image capture the i.MX7 has three units: 13 For image capture the i.MX7 has three units:
14 - CMOS Sensor Interface (CSI) 14 - CMOS Sensor Interface (CSI)
15 - Video Multiplexer 15 - Video Multiplexer
16 - MIPI CSI-2 Receiver 16 - MIPI CSI-2 Receiver
17 17
18 .. code-block:: none 18 .. code-block:: none
19 19
20 MIPI Camera Input ---> MIPI CSI-2 --- > |\ 20 MIPI Camera Input ---> MIPI CSI-2 --- > |\
21 | \ 21 | \
22 | 22 | \
23 | M 23 | M |
24 | U 24 | U | ------> CSI ---> Capture
25 | X 25 | X |
26 | 26 | /
27 Parallel Camera Input ----------------> | / 27 Parallel Camera Input ----------------> | /
28 |/ 28 |/
29 29
30 For additional information, please refer to th 30 For additional information, please refer to the latest versions of the i.MX7
31 reference manual [#f1]_. 31 reference manual [#f1]_.
32 32
33 Entities 33 Entities
34 -------- 34 --------
35 35
36 imx-mipi-csi2 !! 36 imx7-mipi-csi2
37 -------------- 37 --------------
38 38
39 This is the MIPI CSI-2 receiver entity. It has 39 This is the MIPI CSI-2 receiver entity. It has one sink pad to receive the pixel
40 data from MIPI CSI-2 camera sensor. It has one 40 data from MIPI CSI-2 camera sensor. It has one source pad, corresponding to the
41 virtual channel 0. This module is compliant to 41 virtual channel 0. This module is compliant to previous version of Samsung
42 D-phy, and supports two D-PHY Rx Data lanes. 42 D-phy, and supports two D-PHY Rx Data lanes.
43 43
44 csi-mux 44 csi-mux
45 ------- 45 -------
46 46
47 This is the video multiplexer. It has two sink 47 This is the video multiplexer. It has two sink pads to select from either camera
48 sensor with a parallel interface or from MIPI 48 sensor with a parallel interface or from MIPI CSI-2 virtual channel 0. It has
49 a single source pad that routes to the CSI. 49 a single source pad that routes to the CSI.
50 50
51 csi 51 csi
52 --- 52 ---
53 53
54 The CSI enables the chip to connect directly t 54 The CSI enables the chip to connect directly to external CMOS image sensor. CSI
55 can interface directly with Parallel and MIPI 55 can interface directly with Parallel and MIPI CSI-2 buses. It has 256 x 64 FIFO
56 to store received image pixel data and embedde 56 to store received image pixel data and embedded DMA controllers to transfer data
57 from the FIFO through AHB bus. 57 from the FIFO through AHB bus.
58 58
59 This entity has one sink pad that receives fro 59 This entity has one sink pad that receives from the csi-mux entity and a single
60 source pad that routes video frames directly t 60 source pad that routes video frames directly to memory buffers. This pad is
61 routed to a capture device node. 61 routed to a capture device node.
62 62
63 Usage Notes 63 Usage Notes
64 ----------- 64 -----------
65 65
66 To aid in configuration and for backward compa 66 To aid in configuration and for backward compatibility with V4L2 applications
67 that access controls only from video device no 67 that access controls only from video device nodes, the capture device interfaces
68 inherit controls from the active entities in t 68 inherit controls from the active entities in the current pipeline, so controls
69 can be accessed either directly from the subde 69 can be accessed either directly from the subdev or from the active capture
70 device interface. For example, the sensor cont 70 device interface. For example, the sensor controls are available either from the
71 sensor subdevs or from the active capture devi 71 sensor subdevs or from the active capture device.
72 72
73 Warp7 with OV2680 73 Warp7 with OV2680
74 ----------------- 74 -----------------
75 75
76 On this platform an OV2680 MIPI CSI-2 module i 76 On this platform an OV2680 MIPI CSI-2 module is connected to the internal MIPI
77 CSI-2 receiver. The following example configur 77 CSI-2 receiver. The following example configures a video capture pipeline with
78 an output of 800x600, and BGGR 10 bit bayer fo 78 an output of 800x600, and BGGR 10 bit bayer format:
79 79
80 .. code-block:: none 80 .. code-block:: none
81 81
82 # Setup links 82 # Setup links
83 media-ctl -l "'ov2680 1-0036':0 -> 'imx7-mi 83 media-ctl -l "'ov2680 1-0036':0 -> 'imx7-mipi-csis.0':0[1]"
84 media-ctl -l "'imx7-mipi-csis.0':1 -> 'csi- 84 media-ctl -l "'imx7-mipi-csis.0':1 -> 'csi-mux':1[1]"
85 media-ctl -l "'csi-mux':2 -> 'csi':0[1]" 85 media-ctl -l "'csi-mux':2 -> 'csi':0[1]"
86 media-ctl -l "'csi':1 -> 'csi capture':0[1] 86 media-ctl -l "'csi':1 -> 'csi capture':0[1]"
87 87
88 # Configure pads for pipeline 88 # Configure pads for pipeline
89 media-ctl -V "'ov2680 1-0036':0 [fmt:SBGGR1 89 media-ctl -V "'ov2680 1-0036':0 [fmt:SBGGR10_1X10/800x600 field:none]"
90 media-ctl -V "'csi-mux':1 [fmt:SBGGR10_1X10 90 media-ctl -V "'csi-mux':1 [fmt:SBGGR10_1X10/800x600 field:none]"
91 media-ctl -V "'csi-mux':2 [fmt:SBGGR10_1X10 91 media-ctl -V "'csi-mux':2 [fmt:SBGGR10_1X10/800x600 field:none]"
92 media-ctl -V "'imx7-mipi-csis.0':0 [fmt:SBG 92 media-ctl -V "'imx7-mipi-csis.0':0 [fmt:SBGGR10_1X10/800x600 field:none]"
93 media-ctl -V "'csi':0 [fmt:SBGGR10_1X10/800 93 media-ctl -V "'csi':0 [fmt:SBGGR10_1X10/800x600 field:none]"
94 94
95 After this streaming can start. The v4l2-ctl t 95 After this streaming can start. The v4l2-ctl tool can be used to select any of
96 the resolutions supported by the sensor. 96 the resolutions supported by the sensor.
97 97
98 .. code-block:: none 98 .. code-block:: none
99 99
100 # media-ctl -p 100 # media-ctl -p
101 Media controller API version 5.2.0 101 Media controller API version 5.2.0
102 102
103 Media device information 103 Media device information
104 ------------------------ 104 ------------------------
105 driver imx7-csi 105 driver imx7-csi
106 model imx-media 106 model imx-media
107 serial 107 serial
108 bus info 108 bus info
109 hw revision 0x0 109 hw revision 0x0
110 driver version 5.2.0 110 driver version 5.2.0
111 111
112 Device topology 112 Device topology
113 - entity 1: csi (2 pads, 2 links) 113 - entity 1: csi (2 pads, 2 links)
114 type V4L2 subdev subtype U 114 type V4L2 subdev subtype Unknown flags 0
115 device node name /dev/v4l- 115 device node name /dev/v4l-subdev0
116 pad0: Sink 116 pad0: Sink
117 [fmt:SBGGR10_1X10/800x 117 [fmt:SBGGR10_1X10/800x600 field:none colorspace:srgb xfer:srgb ycbcr:601 quantization:full-range]
118 <- "csi-mux":2 [ENABLE 118 <- "csi-mux":2 [ENABLED]
119 pad1: Source 119 pad1: Source
120 [fmt:SBGGR10_1X10/800x 120 [fmt:SBGGR10_1X10/800x600 field:none colorspace:srgb xfer:srgb ycbcr:601 quantization:full-range]
121 -> "csi capture":0 [EN 121 -> "csi capture":0 [ENABLED]
122 122
123 - entity 4: csi capture (1 pad, 1 link 123 - entity 4: csi capture (1 pad, 1 link)
124 type Node subtype V4L flag 124 type Node subtype V4L flags 0
125 device node name /dev/vide 125 device node name /dev/video0
126 pad0: Sink 126 pad0: Sink
127 <- "csi":1 [ENABLED] 127 <- "csi":1 [ENABLED]
128 128
129 - entity 10: csi-mux (3 pads, 2 links) 129 - entity 10: csi-mux (3 pads, 2 links)
130 type V4L2 subdev subtype 130 type V4L2 subdev subtype Unknown flags 0
131 device node name /dev/v4l 131 device node name /dev/v4l-subdev1
132 pad0: Sink 132 pad0: Sink
133 [fmt:Y8_1X8/1x1 field: 133 [fmt:Y8_1X8/1x1 field:none]
134 pad1: Sink 134 pad1: Sink
135 [fmt:SBGGR10_1X10/800x6 135 [fmt:SBGGR10_1X10/800x600 field:none]
136 <- "imx7-mipi-csis.0": 136 <- "imx7-mipi-csis.0":1 [ENABLED]
137 pad2: Source 137 pad2: Source
138 [fmt:SBGGR10_1X10/800x 138 [fmt:SBGGR10_1X10/800x600 field:none]
139 -> "csi":0 [ENABLED] 139 -> "csi":0 [ENABLED]
140 140
141 - entity 14: imx7-mipi-csis.0 (2 pads, 141 - entity 14: imx7-mipi-csis.0 (2 pads, 2 links)
142 type V4L2 subdev subtype 142 type V4L2 subdev subtype Unknown flags 0
143 device node name /dev/v4l 143 device node name /dev/v4l-subdev2
144 pad0: Sink 144 pad0: Sink
145 [fmt:SBGGR10_1X10/800x 145 [fmt:SBGGR10_1X10/800x600 field:none]
146 <- "ov2680 1-0036":0 [ 146 <- "ov2680 1-0036":0 [ENABLED]
147 pad1: Source 147 pad1: Source
148 [fmt:SBGGR10_1X10/800x 148 [fmt:SBGGR10_1X10/800x600 field:none]
149 -> "csi-mux":1 [ENABLE 149 -> "csi-mux":1 [ENABLED]
150 150
151 - entity 17: ov2680 1-0036 (1 pad, 1 l 151 - entity 17: ov2680 1-0036 (1 pad, 1 link)
152 type V4L2 subdev subtype 152 type V4L2 subdev subtype Sensor flags 0
153 device node name /dev/v4l 153 device node name /dev/v4l-subdev3
154 pad0: Source 154 pad0: Source
155 [fmt:SBGGR10_1X10/800x 155 [fmt:SBGGR10_1X10/800x600@1/30 field:none colorspace:srgb]
156 -> "imx7-mipi-csis.0": 156 -> "imx7-mipi-csis.0":0 [ENABLED]
157 <<
158 i.MX6ULL-EVK with OV5640 <<
159 ------------------------ <<
160 <<
161 On this platform a parallel OV5640 sensor is c <<
162 The following example configures a video captu <<
163 of 640x480 and UYVY8_2X8 format: <<
164 <<
165 .. code-block:: none <<
166 <<
167 # Setup links <<
168 media-ctl -l "'ov5640 1-003c':0 -> 'csi':0[ <<
169 media-ctl -l "'csi':1 -> 'csi capture':0[1] <<
170 <<
171 # Configure pads for pipeline <<
172 media-ctl -v -V "'ov5640 1-003c':0 [fmt:UYV <<
173 <<
174 After this streaming can start: <<
175 <<
176 .. code-block:: none <<
177 <<
178 gst-launch-1.0 -v v4l2src device=/dev/video <<
179 <<
180 .. code-block:: none <<
181 <<
182 # media-ctl -p <<
183 Media controller API version 5.14.0 <<
184 <<
185 Media device information <<
186 ------------------------ <<
187 driver imx7-csi <<
188 model imx-media <<
189 serial <<
190 bus info <<
191 hw revision 0x0 <<
192 driver version 5.14.0 <<
193 <<
194 Device topology <<
195 - entity 1: csi (2 pads, 2 links) <<
196 type V4L2 subdev subtype U <<
197 device node name /dev/v4l- <<
198 pad0: Sink <<
199 [fmt:UYVY8_2X8/640x480 <<
200 <- "ov5640 1-003c":0 [ <<
201 pad1: Source <<
202 [fmt:UYVY8_2X8/640x480 <<
203 -> "csi capture":0 [EN <<
204 <<
205 - entity 4: csi capture (1 pad, 1 link <<
206 type Node subtype V4L flag <<
207 device node name /dev/vide <<
208 pad0: Sink <<
209 <- "csi":1 [ENABLED,IM <<
210 <<
211 - entity 10: ov5640 1-003c (1 pad, 1 l <<
212 type V4L2 subdev subtype <<
213 device node name /dev/v4l <<
214 pad0: Source <<
215 [fmt:UYVY8_2X8/640x480 <<
216 -> "csi":0 [ENABLED,IM <<
217 157
218 References 158 References
219 ---------- 159 ----------
220 160
221 .. [#f1] https://www.nxp.com/docs/en/reference 161 .. [#f1] https://www.nxp.com/docs/en/reference-manual/IMX7SRM.pdf
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