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[media] mt9p031: Fix horizontal and vertical blanking configuration 

Compute the horizontal blanking value according to the datasheet. The
value written to the hblank and vblank registers must be equal to the
number of blank columns and rows minus one.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Sakari Ailus <sakari.ailus@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Laurent Pinchart 2012-05-23 06:51:55 -03:00 committed by Mauro Carvalho Chehab
parent 9ec670e2aa
commit 5266c98b15
1 changed files with 6 additions and 6 deletions
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12
drivers/media/i2c/mt9p031.c
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@ -55,9 +55,9 @@
#define MT9P031_HORIZONTAL_BLANK_MIN 0 #define MT9P031_HORIZONTAL_BLANK_MIN 0
#define MT9P031_HORIZONTAL_BLANK_MAX 4095 #define MT9P031_HORIZONTAL_BLANK_MAX 4095
#define MT9P031_VERTICAL_BLANK 0x06 #define MT9P031_VERTICAL_BLANK 0x06
#define MT9P031_VERTICAL_BLANK_MIN 0 #define MT9P031_VERTICAL_BLANK_MIN 1
#define MT9P031_VERTICAL_BLANK_MAX 4095 #define MT9P031_VERTICAL_BLANK_MAX 4096
#define MT9P031_VERTICAL_BLANK_DEF 25 #define MT9P031_VERTICAL_BLANK_DEF 26
#define MT9P031_OUTPUT_CONTROL 0x07 #define MT9P031_OUTPUT_CONTROL 0x07
#define MT9P031_OUTPUT_CONTROL_CEN 2 #define MT9P031_OUTPUT_CONTROL_CEN 2
#define MT9P031_OUTPUT_CONTROL_SYN 1 #define MT9P031_OUTPUT_CONTROL_SYN 1
@ -368,13 +368,13 @@ static int mt9p031_set_params(struct mt9p031 *mt9p031)
/* Blanking - use minimum value for horizontal blanking and default /* Blanking - use minimum value for horizontal blanking and default
* value for vertical blanking. * value for vertical blanking.
*/ */
hblank = 346 * ybin + 64 + (80 >> max_t(unsigned int, xbin, 3)); hblank = 346 * ybin + 64 + (80 >> min_t(unsigned int, xbin, 3));
vblank = MT9P031_VERTICAL_BLANK_DEF; vblank = MT9P031_VERTICAL_BLANK_DEF;
ret = mt9p031_write(client, MT9P031_HORIZONTAL_BLANK, hblank); ret = mt9p031_write(client, MT9P031_HORIZONTAL_BLANK, hblank - 1);
if (ret < 0) if (ret < 0)
return ret; return ret;
ret = mt9p031_write(client, MT9P031_VERTICAL_BLANK, vblank); ret = mt9p031_write(client, MT9P031_VERTICAL_BLANK, vblank - 1);
if (ret < 0) if (ret < 0)
return ret; return ret;