Hi,
This patch improves ATBM8830 reception by using per card AGC
configuration rather than register default.
Regards,
David
Signed-off-by: David T. L. Wong <davidtlw...@gmail.com>
diff --git a/linux/drivers/media/dvb/dvb-usb/cxusb.c b/linux/drivers/media/dvb/dvb-usb/cxusb.c
--- a/linux/drivers/media/dvb/dvb-usb/cxusb.c
+++ b/linux/drivers/media/dvb/dvb-usb/cxusb.c
@@ -1187,6 +1187,9 @@
.osc_clk_freq = 30400, /* in kHz */
.if_freq = 0, /* zero IF */
.zif_swap_iq = 1,
+ .agc_min = 0x2E,
+ .agc_max = 0x90,
+ .agc_hold_loop = 0,
};
static int cxusb_mygica_d689_frontend_attach(struct dvb_usb_adapter *adap)
diff --git a/linux/drivers/media/dvb/frontends/atbm8830.c b/linux/drivers/media/dvb/frontends/atbm8830.c
--- a/linux/drivers/media/dvb/frontends/atbm8830.c
+++ b/linux/drivers/media/dvb/frontends/atbm8830.c
@@ -164,6 +164,10 @@
static int set_agc_config(struct atbm_state *priv,
u8 min, u8 max, u8 hold_loop)
{
+ /* no effect if both min and max are zero */
+ if (!min && !max)
+ return 0;
+
atbm8830_write_reg(priv, REG_AGC_MIN, min);
atbm8830_write_reg(priv, REG_AGC_MAX, max);
atbm8830_write_reg(priv, REG_AGC_HOLD_LOOP, hold_loop);
@@ -227,11 +231,9 @@
/*Set IF frequency*/
set_if_freq(priv, cfg->if_freq);
-#if 0
/*Set AGC Config*/
set_agc_config(priv, cfg->agc_min, cfg->agc_max,
cfg->agc_hold_loop);
-#endif
/*Set static channel mode*/
set_static_channel_mode(priv);
diff --git a/linux/drivers/media/video/cx23885/cx23885-dvb.c b/linux/drivers/media/video/cx23885/cx23885-dvb.c
--- a/linux/drivers/media/video/cx23885/cx23885-dvb.c
+++ b/linux/drivers/media/video/cx23885/cx23885-dvb.c
@@ -555,6 +555,9 @@
.osc_clk_freq = 30400, /* in kHz */
.if_freq = 0, /* zero IF */
.zif_swap_iq = 1,
+ .agc_min = 0x2E,
+ .agc_max = 0xFF,
+ .agc_hold_loop = 0,
};
static struct max2165_config mygic_x8558pro_max2165_cfg1 = {
@@ -571,6 +574,9 @@
.osc_clk_freq = 30400, /* in kHz */
.if_freq = 0, /* zero IF */
.zif_swap_iq = 1,
+ .agc_min = 0x2E,
+ .agc_max = 0xFF,
+ .agc_hold_loop = 0,
};
static struct max2165_config mygic_x8558pro_max2165_cfg2 = {
