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| author | Hans de Goede <hdegoede@redhat.com> | 2012-01-01 20:35:01 +0100 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-01-06 12:07:49 +0100 |
| commit | eb3fb7c9633f79077c7c650efe0edec1840926da (patch) | |
| tree | 824875bc318f736fcdd7020c909f944c7edd2c07 /drivers/media/video/gspca/spca561.c | |
| parent | [media] gspca - main: isoc mode devices are never low speed (diff) | |
| download | linux-eb3fb7c9633f79077c7c650efe0edec1840926da.tar.xz linux-eb3fb7c9633f79077c7c650efe0edec1840926da.zip | |
[media] gspca: Add a need_max_bandwidth flag to sd_desc
Some cameras will pretty much entirely fill all the image buffers all the
time even though they are using compression.
This patch adds a flag to sd_desc, which drivers for such cameras can set.
When this flag is set the bandwidth calculation code will no longer
assume that the image buffer size is a worst case and less bandwidth than
imagebufsize * fps will be used on average.
This patch sets this new flag for 3 drivers:
* For spca561 (for rev12a cameras) and nw80x cams as these simply don't work
when given less bandwidth than imagebufsize * fps.
* For sn9c20x cameras, because these show severy jpeg artifacts when
given less bandwidth than imagebufsize * fps and since these are usb2
cameras there is plenty bandwidth anyways.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Jean-François Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/video/gspca/spca561.c')
| -rw-r--r-- | drivers/media/video/gspca/spca561.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/media/video/gspca/spca561.c b/drivers/media/video/gspca/spca561.c index 61743d425584..8a6e258abf30 100644 --- a/drivers/media/video/gspca/spca561.c +++ b/drivers/media/video/gspca/spca561.c @@ -451,6 +451,7 @@ static int sd_config(struct gspca_dev *gspca_dev, } cam = &gspca_dev->cam; + cam->needs_full_bandwidth = 1; sd->chip_revision = id->driver_info; if (sd->chip_revision == Rev012A) { |