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[media] gspca_zc3xx: Disable the highest quality setting as it is not usable

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Even with BRC the highest quality setting is not usable, BRC strips so
much data from each MCU that the quality becomes worse then using a lower
quality setting to begin with.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Hans de Goede 2012-05-06 09:28:26 -03:00 committed by Mauro Carvalho Chehab
parent 55db765c54
commit 1b3bbcf5ab
1 changed files with 6 additions and 3 deletions
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9
drivers/media/video/gspca/zc3xx.c
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@ -194,7 +194,7 @@ static const struct ctrl sd_ctrls[NCTRLS] = {
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "Compression Quality",
.minimum = 50,
.maximum = 94,
.maximum = 87,
.step = 1,
.default_value = 75,
},
@ -241,8 +241,11 @@ static const struct v4l2_pix_format sif_mode[] = {
.priv = 0},
};
/* bridge reg08 bits 1-2 -> JPEG quality conversion table */
static u8 jpeg_qual[] = {50, 75, 87, 94};
/*
* Bridge reg08 bits 1-2 -> JPEG quality conversion table. Note the highest
* quality setting is not usable as USB 1 does not have enough bandwidth.
*/
static u8 jpeg_qual[] = {50, 75, 87, /* 94 */};
/* usb exchanges */
struct usb_action {