[media] xc5000: add support for showing the SNR and gain in the debug output

When debugging is enabled, also show the analog SNR and the total gain
status values.

Signed-off-by: Devin Heitmueller <dheitmueller@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 20 insertions, 0 deletions

diff --git a/drivers/media/common/tuners/xc5000.c b/drivers/media/common/tuners/xc5000.c
index a8f108652f55..a3f775a2ccd7 100644
--- a/drivers/media/common/tuners/xc5000.c
+++ b/drivers/media/common/tuners/xc5000.c
@@ -111,6 +111,7 @@ struct xc5000_priv {
 #define XREG_PRODUCT_ID   0x08
 #define XREG_BUSY         0x09
 #define XREG_BUILD        0x0D
+#define XREG_TOTALGAIN    0x0F
 
 /*
    Basic firmware description. This will remain with
@@ -541,6 +542,16 @@ static int xc_get_quality(struct xc5000_priv *priv, u16 *quality)
         return xc5000_readreg(priv, XREG_QUALITY, quality);
 }
 
+static int xc_get_analogsnr(struct xc5000_priv *priv, u16 *snr)
+{
+        return xc5000_readreg(priv, XREG_SNR, snr);
+}
+
+static int xc_get_totalgain(struct xc5000_priv *priv, u16 *totalgain)
+{
+        return xc5000_readreg(priv, XREG_TOTALGAIN, totalgain);
+}
+
 static u16 WaitForLock(struct xc5000_priv *priv)
 {
         u16 lockState = 0;
@@ -652,6 +663,8 @@ static void xc_debug_dump(struct xc5000_priv *priv)
         u32 hsync_freq_hz = 0;
         u16 frame_lines;
         u16 quality;
+        u16 snr;
+        u16 totalgain;
         u8 hw_majorversion = 0, hw_minorversion = 0;
         u8 fw_majorversion = 0, fw_minorversion = 0;
         u16 fw_buildversion = 0;
@@ -687,6 +700,13 @@ static void xc_debug_dump(struct xc5000_priv *priv)
 
         xc_get_quality(priv,  &quality);
         dprintk(1, "*** Quality (0:<8dB, 7:>56dB) = %d\n", quality & 0x07);
+
+        xc_get_analogsnr(priv,  &snr);
+        dprintk(1, "*** Unweighted analog SNR = %d dB\n", snr & 0x3f);
+
+        xc_get_totalgain(priv,  &totalgain);
+        dprintk(1, "*** Total gain = %d.%d dB\n", totalgain / 256,
+                (totalgain % 256) * 100 / 256);
 }
 
 static int xc5000_set_params(struct dvb_frontend *fe)