media: i2c: dw9719: Fix power on/off sequence

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The "jiggle" code was not actually expecting failure, which it should
because that's what actually happens when the device wasn't already woken
up by the regulator power-on (i.e. in the case of a shared regulator).

Also, do actually enter the internal suspend mode on shutdown, to save
power in the case of a shared regulator.

Also, wait a bit longer (2x tOPR) on waking up, 1x is not enough at least
on the DW9718S as found on the motorola-nora smartphone.

Signed-off-by: Val Packett <val@packett.cool>
Signed-off-by: André Apitzsch <git@apitzsch.eu>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>

...

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Val Packett 2025-09-20 14:03:47 +02:00 • committed by Hans Verkuil

parent 5e18755738

commit a4b325c23e

1 changed files with 19 additions and 7 deletions

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drivers/media/i2c/dw9719.c

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