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media: mt9m114: Lower minimum vblank value

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As the comment above the defines says, the minimum values are undocumented
so the lowest values seen in register lists are used.

The version of the mt9m114 driver shipped together with the atomisp code
uses 21 for vblank in its register lists, lower MT9M114_MIN_VBLANK
accordingly.

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>
This commit is contained in:
Hans de Goede 2025-12-30 18:03:00 +01:00 committed by Hans Verkuil
parent 1df58b9dda
commit 71087c9b81
1 changed files with 2 additions and 2 deletions
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4
drivers/media/i2c/mt9m114.c
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@ -329,13 +329,13 @@
/*
* The minimum amount of horizontal and vertical blanking is undocumented. The
* minimum values that have been seen in register lists are 303 and 38, use
* minimum values that have been seen in register lists are 303 and 21, use
* them.
*
* Set the default to achieve 1280x960 at 30fps with a 48 MHz pixclock.
*/
#define MT9M114_MIN_HBLANK 303
#define MT9M114_MIN_VBLANK 38
#define MT9M114_MIN_VBLANK 21
#define MT9M114_DEF_HBLANK 323
#define MT9M114_DEF_VBLANK 39