Commit 0218d53a authored by Hans de Goede's avatar Hans de Goede Committed by Mauro Carvalho Chehab

[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: default avatarHans de Goede <hdegoede@redhat.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent 4d6454db
......@@ -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);
......
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