[media] xc5000: add IF output level control
Adds control of the IF output level to the xc5000 tuner
configuration structure. Increases the IF level to the
demodulator to fix failure to lock and picture breakup
issues (with the au8522 demodulator, in the case of the
Hauppauge HVR950Q).
This patch works with all XC5000 firmware versions.
Signed-off-by: Richard Vollkommer <linux@hauppauge.com>
Signed-off-by: Michael Ira Krufky <mkrufky@linuxtv.org>
Reviewed-by: Devin Heitmueller <dheitmueller@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
diff --git a/drivers/media/tuners/xc5000.c b/drivers/media/tuners/xc5000.c
index 803a0e6..705c258 100644
--- a/drivers/media/tuners/xc5000.c
+++ b/drivers/media/tuners/xc5000.c
@@ -62,6 +62,7 @@
unsigned int mode;
u8 rf_mode;
u8 radio_input;
+ u16 output_amp;
int chip_id;
u16 pll_register_no;
@@ -744,7 +745,9 @@
return -EIO;
}
- xc_write_reg(priv, XREG_OUTPUT_AMP, 0x8a);
+ dprintk(1, "%s() setting OUTPUT_AMP to 0x%x\n",
+ __func__, priv->output_amp);
+ xc_write_reg(priv, XREG_OUTPUT_AMP, priv->output_amp);
xc_tune_channel(priv, priv->freq_hz, XC_TUNE_DIGITAL);
@@ -1358,6 +1361,9 @@
if (p->radio_input)
priv->radio_input = p->radio_input;
+ if (p->output_amp)
+ priv->output_amp = p->output_amp;
+
return 0;
}
@@ -1438,6 +1444,12 @@
it can be overridden if this is a hybrid driver */
priv->chip_id = (cfg->chip_id) ? cfg->chip_id : 0;
+ /* don't override output_amp if it's already been set
+ unless explicitly specified */
+ if ((priv->output_amp == 0) || (cfg->output_amp))
+ /* use default output_amp value if none specified */
+ priv->output_amp = (cfg->output_amp) ? cfg->output_amp : 0x8a;
+
/* Check if firmware has been loaded. It is possible that another
instance of the driver has loaded the firmware.
*/
diff --git a/drivers/media/tuners/xc5000.h b/drivers/media/tuners/xc5000.h
index 7245cae..6aa534f 100644
--- a/drivers/media/tuners/xc5000.h
+++ b/drivers/media/tuners/xc5000.h
@@ -36,6 +36,7 @@
u32 if_khz;
u8 radio_input;
u16 xtal_khz;
+ u16 output_amp;
int chip_id;
};