[RFC PATCH 0/5] Rockchip ISP1 Driver
tfiga at chromium.org
Wed Nov 15 00:03:23 PST 2017
Thanks for sending the series!
On Wed, Nov 15, 2017 at 3:29 PM, Jacob Chen <jacob-chen at iotwrt.com> wrote:
> This patch series add a ISP(Camera) v4l2 driver for rockchip rk3288/rk3399 SoC.
> - Thomas is rewriting the binding code between isp, phy, sensors, i hope we could get suggestions.
> - There are many mipi interfaces("rx0", "dxrx0")(actually it also could be parallel interface) in SoC and isp can decide which one will be used.
> - Sometimes there will be more than one senor in a mipi phy, the sofrware should decide which one is used(media link).
> - rk3399 have two isp.
Also the two ISP subsystems have their own, completely different, CSI2
PHY blocks, so we need to make the ISP driver work with two different
> - Add a dummy buffer(dma_alloc_coherent) so drvier won't hold buffer.
> - Finish all TODO comments(mostly about hardware) in driver.
> To help do a quick review, i have push source code to my Github.
> Below are some infomations about driver/hardware:
> Rockchip ISP1 have many Hardware Blocks(simplied):
> MIPI --> ISP --> DCrop(Mainpath) --> RSZ(Mainpath) --> DMA(Mainpath)
> DMA-Input --> --> DCrop(Selfpath) --> RSZ(Selfpath) --> DMA(Selfpath);)
> (Acutally the TRM(rk3288, isp) could be found online...... which contains a more detailed block diagrams ;-P)
> The funcitons of each hardware block:
> Mainpath : up to 4k resolution, support raw/yuv format
> Selfpath : up tp 1080p, support rotate, support rgb/yuv format
> RSZ: scaling
> DCrop: crop
> ISP: 3A, Color processing, Crop
> MIPI: MIPI Camera interface
> Media pipelines:
> Mainpath, Selfpath <-- ISP subdev <-- MIPI <-- Sensor
> 3A stats <-- <-- 3A parms
> Code struct:
> capture.c : Mainpath, Selfpath, RSZ, DCROP : capture device.
> rkisp1.c : ISP : v4l2 sub-device.
> isp_params.c : 3A parms : output device.
> isp_stats.c : 3A stats : capture device.
> mipi_dphy_sy.c : MIPI : sperated v4l2 sub-device.
> use below v4l2-ctl command to capture frames.
> v4l2-ctl --verbose -d /dev/video4 --stream-mmap=2
> --stream-to=/tmp/stream.out --stream-count=60 --stream-poll
> use below command to playback the video on your PC.
> mplayer /tmp/stream.out -loop 0 --demuxer=rawvideo
> mplayer ./stream.out -loop 0 -demuxer rawvideo -rawvideo
> use rkcamsrc gstreamer plugin(just a modified v4l2src) to preview.
> gst-launch-1.0 rkcamsrc device=/dev/video0 io-mode=4 disable-3A=true
> videoconvert ! video/x-raw,format=NV12,width=640,height=480 ! kmssink
Is the rkcamsrc plugin source available somewhere to download?
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