OV7251 overlay and defconfig #3714
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Adds an overlay for the OV7251 VGA global shutter sensor. Signed-off-by: Dave Stevenson <[email protected]>
Signed-off-by: Dave Stevenson <[email protected]>
| port { | ||
| csi1_ep: endpoint { | ||
| remote-endpoint = <&ov7251_0>; | ||
| data-lanes = <1>; |
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Some of the camera overlays give the csi endpoint a clock-lanes property, while others don't. What's the logic behind the choice?
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clock-lanes ought to be there for completeness, but isn't mandatory in our case.
Some SoCs (and a very few sensors) allow reassigning of CSI pair to function, so you might get
clock-lanes = <4>
data-lanes = <0 2 1 3>
if someone had been particularly perverse in their wiring.
Unicam doesn't support reordering, so clock-lane will always be <0> (assumed and never checked), and the only thing that matters in data-lanes is the number of entries. I did put in clock-lane for completeness on a couple of overlays, and probably ought to here too.
The other parameter that might be worth specifying is the bus-type (CSI-2 DPHY vs CCP2 vs parallel, etc). Upstream are moving towards pushing this explicitly into DT instead of deducing it from the other parameters that are specified on the endpoint. I may blitz them all if I get particularly bored.
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It's been confirmed on https://www.raspberrypi.org/forums/viewtopic.php?f=43&t=277885 that the overlay loads and they can stream images from the sensor, so I'm good with this. |
kernel: vc4_hdmi: Support HBR audio See: raspberrypi/linux#3717 kernel: OV7251 overlay and defconfig See: raspberrypi/linux#3714 kernel: Imx290 & unicam v4l2-compliance fixes See: raspberrypi/linux#3712 kernel: Enhances the DAC+ driver to control the optional headphone amplifier See: raspberrypi/linux#3711 kernel: OV9281 driver and overlay See: raspberrypi/linux#3709 kernel: dtoverlays: Fixup imx219 and imx477 overlays due to parsing failures See: raspberrypi/linux#3706 kernel: FKMS: max refresh rate and blocking 1366x768 See: raspberrypi/linux#3704 kernel: Fix lockups and IRQ jitter on multicore RasPis See: raspberrypi/linux#3703 kernel: dts: Further simplify firmware clocks See: raspberrypi/linux#3609 kernel: configs: Add CAN_EMS_USB=m See: raspberrypi/linux#3716 kernel: configs: Enable CONFIG_BLK_DEV_NVME=m kernel: ARM: dts: Make bcm2711 dts more like 5.7 firmware: arm_loader: Don't enable the ARM USB IRQ See: raspberrypi/linux#3703 firmware: hdmi: Remove M2MC/BVB min turbo clock request
kernel: vc4_hdmi: Support HBR audio See: raspberrypi/linux#3717 kernel: OV7251 overlay and defconfig See: raspberrypi/linux#3714 kernel: Imx290 & unicam v4l2-compliance fixes See: raspberrypi/linux#3712 kernel: Enhances the DAC+ driver to control the optional headphone amplifier See: raspberrypi/linux#3711 kernel: OV9281 driver and overlay See: raspberrypi/linux#3709 kernel: dtoverlays: Fixup imx219 and imx477 overlays due to parsing failures See: raspberrypi/linux#3706 kernel: FKMS: max refresh rate and blocking 1366x768 See: raspberrypi/linux#3704 kernel: Fix lockups and IRQ jitter on multicore RasPis See: raspberrypi/linux#3703 kernel: dts: Further simplify firmware clocks See: raspberrypi/linux#3609 kernel: configs: Add CAN_EMS_USB=m See: raspberrypi/linux#3716 kernel: configs: Enable CONFIG_BLK_DEV_NVME=m kernel: ARM: dts: Make bcm2711 dts more like 5.7 firmware: arm_loader: Don't enable the ARM USB IRQ See: raspberrypi/linux#3703 firmware: hdmi: Remove M2MC/BVB min turbo clock request
Overlay and defconfig change to enable OV7251.
Requested on https://www.raspberrypi.org/forums/viewtopic.php?f=28&t=277885
I don't have any hardware to test with, but hacking the driver not to try any of the I2C reads, it does probe and register with V4L2 properly.