media: i2c: imx415: Make HBLANK controllable and in consistent units

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The control of HMAX documented in the datasheet is consistent
with being in terms of a scaled INCK, being always 72MHz or
74.25MHz. It is NOT link frequency dependent, but the minimum
value for HMAX is dictated by the link frequency.

If PIXEL_RATE is defined as being 12 times the 72 or 74.25MHz,
and all values are scaled down again when writing HMAX, then
the numbers all work out regardless of INCK or link frequency.
Retain an hmax_min (set to the same value as the previous fixed
hmax register value) to set as the default value to avoid changing
the behaviour for existing users.

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Reviewed-by: Michael Riesch <michael.riesch@wolfvision.net>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>

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Dave Stevenson 2025-01-29 15:03:50 +00:00 • committed by Hans Verkuil

parent 3bcae55ab9

commit 4e42bc8bf9

1 changed files with 40 additions and 48 deletions

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drivers/media/i2c/imx415.c

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