From 0218d53a12a1b90d261b6f9cf0a4cee38d230916 Mon Sep 17 00:00:00 2001 From: Hans de Goede Date: Sun, 1 Jan 2012 13:45:43 -0300 Subject: [PATCH] [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 Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/gspca/ov519.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/media/video/gspca/ov519.c b/drivers/media/video/gspca/ov519.c index 3d68ad5..1075668 100644 --- a/drivers/media/video/gspca/ov519.c +++ b/drivers/media/video/gspca/ov519.c @@ -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); -- 2.7.4