media: mt9m114: Tweak default hblank and vblank for more accurate fps

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The PLL gets programmed to achieve a 48 MHz pixelclock, with the current
vblank + hblank defaults this results in a fps of:

48000000 / ((1296 + 307) * (976 + 23) = 29.974 fps

Tweak the defaults to get closer to 30 fps:

48000000 / ((1296 + 308) * (976 + 21) = 30.015 fps

This improves things from being 0.026 fps too low to 0.015 fps too high.

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans de Goede <johannes.goede@oss.qualcomm.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>

...

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Hans de Goede 2025-12-30 18:03:02 +01:00 • committed by Hans Verkuil

parent 0fa4baded5

commit 432d109333

1 changed files with 2 additions and 2 deletions

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drivers/media/i2c/mt9m114.c

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