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authorMichael Krufky <mkrufky@infradead.org>2007-12-18 08:42:33 -0500
committerMauro Carvalho Chehab <mchehab@infradead.org>2008-01-25 16:04:09 -0500
commitd536c9df41f5e47a37e22b46ea98451ce8134e55 (patch)
tree1afbd242fe43df1f79fcec1a0a42bf3633211b75
parent0b6a3342a645208feaab76332f1eee33e1688bd5 (diff)
V4L/DVB (6875): tuner-xc2028: ATSC requires 1.75 MHz tuning offset
In my testing yesterday, I was using a scan file tailored specifically for a unique test situation -- As it turns out, this scan file was bad, and I will use the one included inside dvb-apps for testing for now on. I've tested with other ATSC tuners just to confirm, using: us-ATSC-center-frequencies-8VSB Anyhow, as it turns out, the tuner-xc2028 *does* require a tuning offset for ATSC. Even though the linux-dvb api passes in center frequencies from userspace, apparantly the xceive firmware is already factoring in the tuning offset to center. In order to make the device function using the same scan files / channels.conf configurations as other atsc devices, we must offset by 1.75 MHz. Signed-off-by: Michael Krufky <mkrufky@linuxtv.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
-rw-r--r--drivers/media/video/tuner-xc2028.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/media/video/tuner-xc2028.c b/drivers/media/video/tuner-xc2028.c
index d367f205c98a..5ed12e2272e9 100644
--- a/drivers/media/video/tuner-xc2028.c
+++ b/drivers/media/video/tuner-xc2028.c
@@ -873,7 +873,9 @@ static int generic_set_freq(struct dvb_frontend *fe, u32 freq /* in HZ */,
873 */ 873 */
874 if (new_mode == T_ANALOG_TV) { 874 if (new_mode == T_ANALOG_TV) {
875 rc = send_seq(priv, {0x00, 0x00}); 875 rc = send_seq(priv, {0x00, 0x00});
876 } else if (!(priv->cur_fw.type & ATSC)) { 876 } else if (priv->cur_fw.type & ATSC) {
877 offset = 1750000;
878 } else {
877 offset = 2750000; 879 offset = 2750000;
878 /* 880 /*
879 * We must adjust the offset by 500kHz in two cases in order 881 * We must adjust the offset by 500kHz in two cases in order