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V4L/DVB (12174): mt9v011: let's stick with datasheet values where it works

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The original driver for Silvercrest cameras were using some values that
are different from what datasheet says. As result, it was taken very
less snapshots per second than expected.

A test with the datasheet values showed that they work fine and give a
better frame rate. So, let's stick with datasheet values.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Mauro Carvalho Chehab 2009-07-04 08:15:11 -03:00
parent 27fe4a30a2
commit 6934e6ffac
1 changed files with 7 additions and 16 deletions
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23
drivers/media/video/mt9v011.c
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@ -124,24 +124,12 @@ static const struct i2c_reg_value mt9v011_init_default[] = {
{ R0D_MT9V011_RESET, 0x0001 },
{ R0D_MT9V011_RESET, 0x0000 },
{ R09_MT9V011_SHUTTER_WIDTH, 0x0418 },
{ R0A_MT9V011_CLK_SPEED, 0x0000 },
{ R0C_MT9V011_SHUTTER_DELAY, 0x0000 },
{ R1E_MT9V011_DIGITAL_ZOOM, 0x0000 },
{ R20_MT9V011_READ_MODE, 0x1100 },
{ R09_MT9V011_SHUTTER_WIDTH, 0x1fc },
/*
* Those registers are not docummented at the datasheet.
* However, the original driver initializes them
*/
{ 0x30, 0x0005 },
{ 0x34, 0x0100 },
{ 0x3d, 0x068f },
{ 0x40, 0x01e0 },
{ 0x52, 0x0100 },
{ 0x58, 0x0038 }, /* Datasheet default 0x0078 */
{ 0x59, 0x0723 }, /* Datasheet default 0x0703 */
{ 0x62, 0x041a }, /* Datasheet default 0x0418 */
{ R0A_MT9V011_CLK_SPEED, 0x0000 },
{ R1E_MT9V011_DIGITAL_ZOOM, 0x0000 },
{ R20_MT9V011_READ_MODE, 0x1000 },
{ R07_MT9V011_OUT_CTRL, 0x000a }, /* chip enable */
};
@ -177,6 +165,9 @@ static void set_res(struct v4l2_subdev *sd)
* hblank and vblank should be adjusted, in order to warrant that
* we'll preserve the line timings for 30 fps, no matter what resolution
* is selected.
* NOTE: datasheet says that width (and height) should be filled with
* width-1. However, this doesn't work, since one pixel per line will
* be missing.
*/
hstart = 14 + (640 - core->width) / 2;