For iMX6DQ, there are two IPUs, so they can support up to 4 cameras at the same time. But the default BSP can only support up to two cameras at the same time. The attached patch can make the BSP support up to 4 cameras based on 3.10.53 GA 1.1.0 BSP. The 4 cameras can be: - 1xCSI, 3xMIPI - 2xCSI, 2xMIPI - 4xMIPI For 4xMIPI case, the four cameras should be combined on the single MIPI CSI2 interface, and each camera data should be transfered on a mipi virtual channel. In this patch, we given the example driver for Intersil ISL79985. The input to ISL79985 is four CVBS camera. There are four patches: 0001-IPU-update-IPU-capture-driver-to-support-up-to-four-.patch Updated IPU common code to support up to four cameras. 0002-Add-Intersil-ISL79985-MIPI-Video-Decoder-Driver-for-.patch ISL79985 driver, which can support both 1 lanes and 2 lanes mode. 0003-Remove-the-page-size-align-requirement-for-v4l2-capt.patch With this patch, the mxc_v4l2_tvin test application can use overlay framebuffer as V4l2 capture buffer directly. 0004-IPU-CSI-Drop-1-2-frame-on-MIPI-interface-for-interla.patch This patch is option, it will drop one field data, so for each camera, the input will be 720*240 30 FPS. For 720P HD solution, it is based on Maxim MAX9286: iMX6DQ MAX9286 MIPI CSI2 720P camera surround view solution for Linux BSP How to builld the kernel with ISL79985 support: make imx_v7_defconfig make menuconfig (In this command, you should select the ISL79985 driver: Device Drivers ---> <*> Multimedia support ---> [*] V4L platform devices ---> <*> MXC Video For Linux Video Capture MXC Camera/V4L2 PRP Features support ---> <*>Intersil ISL79985 Video Decoder support <*>mxc VADC support <*>Select Overlay Rounting (Queue ipu device for overlay library) <*>Pre-processor Encoder library <*>IPU CSI Encoder library) make zImage make dtbs The built out image file: arch/arm/boot/dts/imx6q-sabresd.dtb arch/arm/boot/zImage "mxc_v4l2_tvin.zip" is the test application, test command to capture the four cameras and render on 1080P HDMI display: /mxc_v4l2_tvin.out -ol 0 -ot 0 -ow 960 -oh 540 -d 1 -x 0 -g2d & /mxc_v4l2_tvin.out -ol 960 -ot 0 -ow 960 -oh 540 -d 1 -x 1 -g2d & /mxc_v4l2_tvin.out -ol 0 -ot 540 -ow 960 -oh 540 -d 1 -x 2 -g2d & /mxc_v4l2_tvin.out -ol 960 -ot 540 -ow 960 -oh 540 -d 1 -x 3 -g2d & 2015-10-10 Update: Updated the test application "mxc_v4l2_tvin_isl79985.tar.gz" to fix the Yocto build errors. Updated ISL79985 register setting "page5, isl79985_write_reg(0x07, 0x46)" in patch "0002-Add-Intersil-ISL79985-MIPI-Video-Decoder-Driver-for-.patch", which can fix the green line issue. 2016-01-25 Update: Added de-interlace support, L3.10.53_ISL79985_Surroundview_Patch_20160125.tar.gz New test capplication for de-interlance: mxc_v4l2_tvin_isl79985_vdi_20160125.tar.gz New test commands: /mxc_v4l2_tvin.out -ol 0 -ot 0 -ow 960 -oh 540 -d 1 -x 0 -g2d -m & /mxc_v4l2_tvin.out -ol 960 -ot 0 -ow 960 -oh 540 -d 1 -x 1 -g2d -m & /mxc_v4l2_tvin.out -ol 0 -ot 540 -ow 960 -oh 540 -d 1 -x 2 -g2d -m & /mxc_v4l2_tvin.out -ol 960 -ot 540 -ow 960 -oh 540 -d 1 -x 3 -g2d -m & Note: with the 0005-Add-interlaced-mode-capture-for-ISL79985.patch, the V4l2 capture driver will return 720x480 video size, but only odd lines have the video data, they are filled in line skip line mode. 2016-11-21 Update: Added ISL79987 support, L3.10.53_ISL7998x_Surroundview_Patch_20161121.zip New test capplication for de-interlance support: mxc_v4l2_tvin_isl7998x.tar.gz Test commands (without de-interlace): /mxc_v4l2_tvin.out -ol 0 -ot 0 -ow 960 -oh 540 -d 1 -x 0 -g2d & /mxc_v4l2_tvin.out -ol 960 -ot 0 -ow 960 -oh 540 -d 1 -x 1 -g2d & /mxc_v4l2_tvin.out -ol 0 -ot 540 -ow 960 -oh 540 -d 1 -x 2 -g2d & /mxc_v4l2_tvin.out -ol 960 -ot 540 -ow 960 -oh 540 -d 1 -x 3 -g2d & Test commands (with de-interlace, for ISL79987 only): /mxc_v4l2_tvin.out -ol 0 -ot 0 -ow 960 -oh 540 -d 1 -x 0 -m 1 -g2d & /mxc_v4l2_tvin.out -ol 960 -ot 0 -ow 960 -oh 540 -d 1 -x 1 -m 1 -g2d & /mxc_v4l2_tvin.out -ol 0 -ot 540 -ow 960 -oh 540 -d 1 -x 2 -m 1 -g2d & /mxc_v4l2_tvin.out -ol 960 -ot 540 -ow 960 -oh 540 -d 1 -x 3 -m 1 -g2d & Now the same patch can support both ISL79985 and ISL79987, with NTSC CVBS camera, for ISL79985, it captures 60fps 720*240; for ISL79987, it captures 30fps 720*480. 2016-11-22 Update: Added patch for L4.1.15 BSP, it supports both ISL79985 and ISL79987, L4.1.15_ISL7998x_Surroundview_Patch_20161122.zip Test capplication mxc_v4l2_tvin_isl7998x.tar.gz is re-used.
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