ov13850在core-rk3399-jd4上最大分辨率时，帧率只有7.5FPS
ov13850的文档上显示，支持4224*3136 30FPS，但是在core-rk3399-jd4使用media-ctl命令配置后，帧率仅有7.5FPS。请问如何操作可以在最大分辨率下提高帧率，是否能够达到30FPS。
# media-ctl -p
Media controller API version 0.1.0
Media device information
------------------------
driver rkisp1
model rkisp1
serial
bus info
hw revision 0x0
driver version0.0.0
Device topology
- entity 1: rkisp1-isp-subdev (4 pads, 6 links)
type V4L2 subdev subtype Unknown flags 0
device node name /dev/v4l-subdev0
pad0: Sink
[fmt:SBGGR10_1X10/4224x3136 field:none
crop.bounds:(0,0)/4224x3136
crop:(0,0)/4224x3136]
<- "rkisp1_dmapath":0 []
<- "rockchip-mipi-dphy-rx":1
pad1: Sink
<- "rkisp1-input-params":0
pad2: Source
[fmt:YUYV8_2X8/4224x3136 field:none
crop.bounds:(0,0)/4224x3136
crop:(0,0)/4224x3136]
-> "rkisp1_selfpath":0
-> "rkisp1_mainpath":0
pad3: Source
-> "rkisp1-statistics":0
- entity 2: rkisp1_mainpath (1 pad, 1 link)
type Node subtype V4L flags 0
device node name /dev/video0
pad0: Sink
<- "rkisp1-isp-subdev":2
- entity 3: rkisp1_selfpath (1 pad, 1 link)
type Node subtype V4L flags 0
device node name /dev/video1
pad0: Sink
<- "rkisp1-isp-subdev":2
- entity 4: rkisp1_dmapath (1 pad, 1 link)
type Node subtype V4L flags 0
device node name /dev/video2
pad0: Source
-> "rkisp1-isp-subdev":0 []
- entity 5: rkisp1-statistics (1 pad, 1 link)
type Node subtype V4L flags 0
device node name /dev/video3
pad0: Sink
<- "rkisp1-isp-subdev":3
- entity 6: rkisp1-input-params (1 pad, 1 link)
type Node subtype V4L flags 0
device node name /dev/video4
pad0: Source
-> "rkisp1-isp-subdev":1
- entity 7: rockchip-mipi-dphy-rx (2 pads, 2 links)
type V4L2 subdev subtype Unknown flags 0
device node name /dev/v4l-subdev1
pad0: Sink
<- "m00_b_ov13850 1-0036":0
pad1: Source
-> "rkisp1-isp-subdev":0
- entity 8: m00_b_ov13850 1-0036 (1 pad, 1 link)
type V4L2 subdev subtype Sensor flags 0
device node name /dev/v4l-subdev2
pad0: Source
-> "rockchip-mipi-dphy-rx":0
查看设备树和驱动代码，发现ov13850貌似只用了2路CSI数据，有办法把4路都用上吗，那样至少应该可以提高到15FPS了吧
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