On Thu, 2018-12-20 at 18:36 +0000, Gordon Hollingworth wrote: > Assuming this is using the firmware interface then yes it's fine. If > it is using the i2c directly then it's possible to clash with the GPU > driving the camera Well we're already in such a situation without this patch, as the panel enables the back-light though the I2C lines. This is only enabled by an overlay, it's left to the user's discretion. As commented previously by Alex Graf and given the constraints, I think that it would make sense to start considering both options as good (using FW & direct I2C access). We are defaulting to the FW based one, but providing support/overlays for the direct access doesn't seem a bad compromise to me. I do understand Gordon's concerns. Maybe it would be nice for the firmware to detect device tree nodes accessing I2C0 and disable the camera. Or providing a FW configuration option. Kind regards, Nicolas
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