Am Montag, 18. Januar 2021, 22:41:19 CET schrieb Helen Koike: > > On 1/18/21 3:12 PM, Helen Koike wrote: > > Hi Sebastian, > > > > On 1/17/21 10:12 AM, Sebastian Fricke wrote: > >> Hello, > >> > >> I am currently trying to figure out how to configure my NanoPC-T4 for > >> streaming with two cameras at the same time. The cameras are the CAM1320 > >> (OV13850) and the MCAM40(OV4689), I have ported the drivers from the > >> downstream BSP Kernel to the current 5.11 rc1 kernel. > >> My current attempt is to enable the second instance of the RkISP1, the > >> mipi_dphy_tx1rx1 and setup the OV13850 on i2c1 and the OV4689 on the > > > > The driver phy-rockchip-dphy-rx0.c doesn't support tx1rx1. > > In case you are interested, it seems to be supported by the downstream > driver: > > https://github.com/rockchip-linux/kernel/blob/develop-4.4/drivers/phy/rockchip/phy-rockchip-mipi-rx.c I also did start implementing how I think this could look last year, though never got it to work at the time. Relevant code is at: https://github.com/mmind/linux-rockchip/commits/wip/tc358749 especially: https://github.com/mmind/linux-rockchip/commit/e0d4b03976d2aab85a8c1630be937ea003b5df88 which allows dsi1 to act like a phy instead as it contains the controls for the tx1rx1 dphy. Though I can't say if and when I'll revisit this myself again. Heiko > > Adding support for it upstream would be more then welcome :) > We didn't add it when we merged because we didn't have hw to test it. > > Thanks! > Helen > > > > > Regards, > > Helen > > > >> i2c2. > >> The patch that I apply in this case is the following: > >> https://github.com/initBasti/Linux_kernel_media_tree_fork/commit/9a8e594a660d67f3790da32f3268bebd3d233526> > >> Here is the dmesg ouput when I start the kernel with this patch: > >> ``` > >> [ 7.021079] mc: Linux media interface: v0.10 > >> ... > >> [ 7.084369] videodev: Linux video capture interface: v2.00 > >> ... > >> [ 7.125911] ov4689 2-0036: driver version: 00.01.01 > >> [ 7.125939] ov4689 2-0036: could not get module information! > >> [ 7.130037] ov4689 2-0036: Unexpected sensor id(000000), ret(-5) > >> ... > >> [ 7.143951] ov13850 1-0010: driver version: 00.01.01 > >> [ 7.143980] ov13850 1-0010: could not get module information! > >> [ 7.149127] ov13850 1-0010: Detected OV00d850 sensor, REVISION 0xb1 > >> ... > >> [ 7.259601] rkisp1 ff910000.isp0: Adding to iommu group 4 > >> [ 7.260911] rkisp1: registered rkisp1_mainpath as /dev/video1 > >> [ 7.261100] rkisp1: registered rkisp1_selfpath as /dev/video2 > >> ... > >> [ 7.262628] rkisp1 ff910000.isp0: registered ep id 0 with 2 lanes > >> [ 7.263666] rkvdec ff660000.video-codec: Adding to iommu group 1 > >> [ 7.265120] rkisp1 ff910000.isp0: Async subdev notifier completed > >> [ 7.265458] rkisp1 ff920000.isp1: Adding to iommu group 5 > >> [ 7.266441] rkisp1: registered rkisp1_mainpath as /dev/video6 > >> [ 7.267380] rkisp1: registered rkisp1_selfpath as /dev/video7 > >> [ 7.267945] rkisp1 ff920000.isp1: registered ep id 0 with 2 lanes > >> [ 7.267994] debugfs: Directory 'rkisp1' with parent '/' already present! > >> ``` > >> > >> And here is the long version of the log with pinctrl and gpio debug > >> output. https://paste.debian.net/1181487/ > >> > >> These are the drivers that I use: > >> OV13850: https://github.com/initBasti/Linux_kernel_media_tree_fork/blob/dual_cam/drivers/media/i2c/ov13850.c > >> OV4689: https://github.com/initBasti/Linux_kernel_media_tree_fork/blob/dual_cam/drivers/media/i2c/ov4689.c > >> > >> I have the following questions: > >> 1. Within the mipi_dphy_tx1rx1, I chose the phy-cells value to be `<0>`, but I have to say I am not entirely sure about this value. My current research was within the Documentation/devicetree/bindings/phy folder where I was able to find: > >>> #phy-cells: Number of cells in a PHY specifier; The meaning of all > >>> those cells is defined by the binding for the phy node. The PHY > >>> provider can use the values in cells to find the appropriate PHY. > >> But as there is only a binding for the rx0, I felt like I had to guess. > >> Could someone give me a hint in the right direction? > >> > >> 2. Both ISP instances try to acquire the same endpoint 0, I found out > >> within the code at `rkisp1-dev.c:257`, that the rkisp1 driver tries to > >> get the endpoint from the firmware node at port 0. Looking deeper into > >> the code I can see that there are multiple debugging messages which > >> might be useful, how do I enable the debugging output for prints like: > >> `drivers/media/v4l2-core/v4l2-fwnode.c:419` ? I already enabled > >> CONFIG_DEBUG_KERNEL & CONFIG_DEBUG_MISC & CONFIG_DYNAMIC_DEBUG > >> > >> 3. Is it correct when two camera sensors try to multiplex the > >> cif-clkout-a pinctrl? I have taken this from the friendlyElec fork of > >> the rockchip BSP downstream kernel. https://github.com/friendlyarm/kernel-rockchip/blob/nanopi4-linux-v4.4.y/arch/arm64/boot/dts/rockchip/rk3399-nanopi4-rkisp1.dtsi#L30 > >> I have been testing on of their official images and there the dual mipi setup works. > >> So, I currently ask myself has something significantly changed in this > >> part of the code that I am unaware of? > >> And also I have a really hard time figuring out, where the cif-clkout-a > >> pinctrl is actually used. > >> > >> 4. Has anyone been able to set up the dual cam setup on the rkisp1 on an > >> upstream kernel? If yes how did you do it? > >> > >> Greetings, > >> Sebastian >
