media: i2c: ov9282: Read chip ID via 2 reads #5644
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Vision Components have made an OV9281 module which blocks reading back the majority of registers to comply with NDAs, and in doing so doesn't allow auto-increment register reading as used when reading the chip ID. Use two reads and manually combine the results. Signed-off-by: Dave Stevenson <[email protected]>
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ov9282_read_reg feels like the right place for the workaround, but the end result is likely to be more complicated, so this is OK. |
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kernel: configs: Enable more sound devices See: raspberrypi/linux#5637 kernel: media: i2c: ov9282: Read chip ID via 2 reads See: raspberrypi/linux#5644 kernel: vc04_services: bcm2835-codec: Correct alignment requirements for YUYV See: raspberrypi/linux#5646 kernel: xhci: add quirk for host controllers that don't update endpoint DCS See: raspberrypi/linux#5642 kernel: drivers: media: rp1_cfe: Remove PISP specific MBUS formats See: raspberrypi/linux#5641 kernel: media/rpivid: Make iommu work on rpivid See: raspberrypi/linux#5627 kernel: gpio: brcmstb: Use dynamic GPIO base numbers See: raspberrypi/linux#5639
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kernel: configs: Enable more sound devices See: raspberrypi/linux#5637 kernel: media: i2c: ov9282: Read chip ID via 2 reads See: raspberrypi/linux#5644 kernel: vc04_services: bcm2835-codec: Correct alignment requirements for YUYV See: raspberrypi/linux#5646 kernel: xhci: add quirk for host controllers that don't update endpoint DCS See: raspberrypi/linux#5642 kernel: drivers: media: rp1_cfe: Remove PISP specific MBUS formats See: raspberrypi/linux#5641 kernel: media/rpivid: Make iommu work on rpivid See: raspberrypi/linux#5627 kernel: gpio: brcmstb: Use dynamic GPIO base numbers See: raspberrypi/linux#5639
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Vision Components have made an OV9281 module which blocks reading back the majority of registers to comply with NDAs, and in doing so doesn't allow auto-increment register reading as used when reading the chip ID.
Use two reads and manually combine the results.
We used to have an equivalent patch for this for the downstream ov9281 driver. Mainline view Vision Components' icky I2C behaviour as needing to be supported in either regmap or the v4l2_cci helpers, but doing so looks fairly non-trivial to me, and needs this driver converting to use either of those.