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[media] ov2640: improve banding filter register definitions/documentation

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- add missing initialisation of sensor register COM25 (2 MSBs of banding
  filter AEC values)
- add macros for setting the banding filter AEC values
- add definitions for sensor register 0x5a, which is documented in
  Omnivisions software application notes

Signed-off-by: Frank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Frank Schaefer 2017-04-16 14:35:41 -03:00 committed by Mauro Carvalho Chehab
parent 534dca983e
commit d81638eadd
1 changed files with 17 additions and 3 deletions
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20
drivers/media/i2c/ov2640.c
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@ -248,8 +248,19 @@
#define ZOOMS 0x49 /* Zoom: Vertical start point */
#define COM22 0x4B /* Flash light control */
#define COM25 0x4E /* For Banding operations */
#define COM25_50HZ_BANDING_AEC_MSBS_MASK 0xC0 /* 50Hz Bd. AEC 2 MSBs */
#define COM25_60HZ_BANDING_AEC_MSBS_MASK 0x30 /* 60Hz Bd. AEC 2 MSBs */
#define COM25_50HZ_BANDING_AEC_MSBS_SET(x) VAL_SET(x, 0x3, 8, 6)
#define COM25_60HZ_BANDING_AEC_MSBS_SET(x) VAL_SET(x, 0x3, 8, 4)
#define BD50 0x4F /* 50Hz Banding AEC 8 LSBs */
#define BD50_50HZ_BANDING_AEC_LSBS_SET(x) VAL_SET(x, 0xFF, 0, 0)
#define BD60 0x50 /* 60Hz Banding AEC 8 LSBs */
#define BD60_60HZ_BANDING_AEC_LSBS_SET(x) VAL_SET(x, 0xFF, 0, 0)
#define REG5A 0x5A /* 50/60Hz Banding Maximum AEC Step */
#define BD50_MAX_AEC_STEP_MASK 0xF0 /* 50Hz Banding Max. AEC Step */
#define BD60_MAX_AEC_STEP_MASK 0x0F /* 60Hz Banding Max. AEC Step */
#define BD50_MAX_AEC_STEP_SET(x) VAL_SET((x - 1), 0x0F, 0, 4)
#define BD60_MAX_AEC_STEP_SET(x) VAL_SET((x - 1), 0x0F, 0, 0)
#define REG5D 0x5D /* AVGsel[7:0], 16-zone average weight option */
#define REG5E 0x5E /* AVGsel[15:8], 16-zone average weight option */
#define REG5F 0x5F /* AVGsel[23:16], 16-zone average weight option */
@ -356,9 +367,12 @@ static const struct regval_list ov2640_init_regs[] = {
{ 0x73, 0xc1 },
{ 0x3d, 0x34 },
{ COM7, COM7_RES_UXGA | COM7_ZOOM_EN },
{ 0x5a, 0x57 },
{ BD50, 0xbb },
{ BD60, 0x9c },
{ REG5A, BD50_MAX_AEC_STEP_SET(6)
| BD60_MAX_AEC_STEP_SET(8) }, /* 0x57 */
{ COM25, COM25_50HZ_BANDING_AEC_MSBS_SET(0x0bb)
| COM25_60HZ_BANDING_AEC_MSBS_SET(0x09c) }, /* 0x00 */
{ BD50, BD50_50HZ_BANDING_AEC_LSBS_SET(0x0bb) }, /* 0xbb */
{ BD60, BD60_60HZ_BANDING_AEC_LSBS_SET(0x09c) }, /* 0x9c */
{ BANK_SEL, BANK_SEL_DSP },
{ 0xe5, 0x7f },
{ MC_BIST, MC_BIST_RESET | MC_BIST_BOOT_ROM_SEL },