Robert Lowery wrote:
> Mauro,
>
> I had to make 2 changes to get the patch to work for me
Ok. Please test this (hopefully) final revision.
--
commit bd8bb8798bb96136b6898186d505c9e154334b5d
Author: Mauro Carvalho Chehab <mche...@redhat.com>
Date: Fri Feb 19 02:45:00 2010 -0200
V4L/DVB: tuner-xc2028: fix tuning logic
There's one reported regression in Australia (DTV7) and some
reported troubles with newer firmwares. Rework the logic to improve
tuner on those cases.
Thanks-to: Robert Lowery <rglow...@exemail.com.au>
Thanks-to: Stefan Ringel <stefan.rin...@arcor.de>
Signed-off-by: Mauro Carvalho Chehab <mche...@redhat.com>
diff --git a/drivers/media/common/tuners/tuner-xc2028.c
b/drivers/media/common/tuners/tuner-xc2028.c
index ed50168..ef61815 100644
--- a/drivers/media/common/tuners/tuner-xc2028.c
+++ b/drivers/media/common/tuners/tuner-xc2028.c
@@ -932,30 +932,52 @@ static int generic_set_freq(struct dvb_frontend *fe, u32
freq /* in HZ */,
* that xc2028 will be in a safe state.
* Maybe this might also be needed for DTV.
*/
- if (new_mode == T_ANALOG_TV)
+ if (new_mode == T_ANALOG_TV) {
rc = send_seq(priv, {0x00, 0x00});
- /*
- * Digital modes require an offset to adjust to the
- * proper frequency.
- * Analog modes require offset = 0
- */
- if (new_mode == T_DIGITAL_TV) {
- /* Sets the offset according with firmware */
+ /* Analog modes require offset = 0 */
+ } else {
+ /*
+ * Digital modes require an offset to adjust to the
+ * proper frequency. The offset depends on what
+ * firmware version is used.
+ */
+
+ /*
+ * Adjust to the center frequency. This is calculated by the
+ * formula: offset = 1.25MHz - BW/2
+ * For DTV 7/8, the firmware uses BW = 8000, so it needs a
+ * further adjustment to get the frequency center on VHF
+ */
if (priv->cur_fw.type & DTV6)
offset = 1750000;
else if (priv->cur_fw.type & DTV7)
offset = 2250000;
else /* DTV8 or DTV78 */
offset = 2750000;
+ if ((priv->cur_fw.type & DTV78) && freq < 470000000)
+ offset -= 500000;
/*
- * We must adjust the offset by 500kHz when
- * tuning a 7MHz VHF channel with DTV78 firmware
- * (used in Australia, Italy and Germany)
+ * xc3028 additional "magic"
+ * Depending on the firmware version, it needs some adjustments
+ * to properly centralize the frequency. This seems to be
+ * needed to compensate the SCODE table adjustments made by
+ * newer firmwares
*/
- if ((priv->cur_fw.type & DTV78) && freq < 470000000)
- offset -= 500000;
+
+ if (priv->firm_version < 0x0302) {
+ if (priv->cur_fw.type & DTV7)
+ offset += 500000;
+#if 0
+ /* Still need some tests */
+ } else {
+ if (priv->cur_fw.type & DTV7)
+ offset -= 300000;
+ else if (type != ATSC) /* DVB @6MHz, DTV 8 and DTV 7/8
*/
+ offset += 200000;
+#endif
+ }
}
div = (freq - offset + DIV / 2) / DIV;
@@ -1114,17 +1136,22 @@ static int xc2028_set_params(struct dvb_frontend *fe,
/* All S-code tables need a 200kHz shift */
if (priv->ctrl.demod) {
- demod = priv->ctrl.demod + 200;
+ /*
+ * Newer firmwares require a 200 kHz offset only for ATSC
+ */
+ if (type == ATSC || priv->firm_version < 0x0302)
+ demod = priv->ctrl.demod + 200;
/*
* The DTV7 S-code table needs a 700 kHz shift.
- * Thanks to Terry Wu <terrywu2...@gmail.com> for reporting this
*
* DTV7 is only used in Australia. Germany or Italy may also
* use this firmware after initialization, but a tune to a UHF
* channel should then cause DTV78 to be used.
+ *
+ * Unfortunately, on real-field tests, the s-code offset
+ * didn't work as expected, as reported by
+ * Robert Lowery <rglow...@exemail.com.au>
*/
- if (type & DTV7)
- demod += 500;
}
return generic_set_freq(fe, p->frequency,
--
To unsubscribe from this list: send the line "unsubscribe linux-media" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
