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[media] gscpa_ov519: Fix the bandwidth calc for enabling compression 

Somehow the code has ended up assuming 1400 packets/sec which of course
is wrong for usb1 devices like the ov511 cameras. usb1 only does 1000
(isoc) packets / sec.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Hans de Goede 2012-01-01 13:45:43 -03:00 committed by Mauro Carvalho Chehab
parent 4d6454dbae
commit 0218d53a12
1 changed files with 2 additions and 2 deletions
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4
drivers/media/video/gspca/ov519.c
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@ -3683,8 +3683,8 @@ static void ov511_mode_init_regs(struct sd *sd)
/* Check if we have enough bandwidth to disable compression */
fps = (interlaced ? 60 : 30) / (sd->clockdiv + 1) + 1;
needed = fps * sd->gspca_dev.width * sd->gspca_dev.height * 3 / 2;
/* 1400 is a conservative estimate of the max nr of isoc packets/sec */
if (needed > 1400 * packet_size) {
/* 1000 isoc packets/sec */
if (needed > 1000 * packet_size) {
/* Enable Y and UV quantization and compression */
reg_w(sd, R511_COMP_EN, 0x07);
reg_w(sd, R511_COMP_LUT_EN, 0x03);