[media] v4l: add control for RF tuner PLL lock flag

Add volatile boolean control to indicate if tuner frequency synthesizer
is locked to requested frequency. That means tuner is able to receive
given frequency. Control is named as "PLL lock", since frequency
synthesizers are based of phase-locked-loop. Maybe more general name
could be wise still?

Cc: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

2 files changed, 6 insertions, 0 deletions

diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c
index 48550b0eca2e..55c683254102 100644
--- a/drivers/media/v4l2-core/v4l2-ctrls.c
+++ b/drivers/media/v4l2-core/v4l2-ctrls.c
@@ -869,6 +869,7 @@ const char *v4l2_ctrl_get_name(u32 id)
         case V4L2_CID_RF_TUNER_IF_GAIN:         return "IF Gain";
         case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO:  return "Bandwidth, Auto";
         case V4L2_CID_RF_TUNER_BANDWIDTH:       return "Bandwidth";
+        case V4L2_CID_RF_TUNER_PLL_LOCK:        return "PLL Lock";
         default:
                 return NULL;
         }
@@ -922,6 +923,7 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
         case V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO:
         case V4L2_CID_RF_TUNER_IF_GAIN_AUTO:
         case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO:
+        case V4L2_CID_RF_TUNER_PLL_LOCK:
                 *type = V4L2_CTRL_TYPE_BOOLEAN;
                 *min = 0;
                 *max = *step = 1;
@@ -1106,6 +1108,9 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
         case V4L2_CID_DV_RX_POWER_PRESENT:
                 *flags |= V4L2_CTRL_FLAG_READ_ONLY;
                 break;
+        case V4L2_CID_RF_TUNER_PLL_LOCK:
+                *flags |= V4L2_CTRL_FLAG_VOLATILE;
+                break;
         }
 }
 EXPORT_SYMBOL(v4l2_ctrl_fill);
diff --git a/include/uapi/linux/v4l2-controls.h b/include/uapi/linux/v4l2-controls.h
index 405279f3c326..2ac5597f3ee1 100644
--- a/include/uapi/linux/v4l2-controls.h
+++ b/include/uapi/linux/v4l2-controls.h
@@ -912,5 +912,6 @@ enum v4l2_deemphasis {
 #define V4L2_CID_RF_TUNER_MIXER_GAIN            (V4L2_CID_RF_TUNER_CLASS_BASE + 52)
 #define V4L2_CID_RF_TUNER_IF_GAIN_AUTO          (V4L2_CID_RF_TUNER_CLASS_BASE + 61)
 #define V4L2_CID_RF_TUNER_IF_GAIN               (V4L2_CID_RF_TUNER_CLASS_BASE + 62)
+#define V4L2_CID_RF_TUNER_PLL_LOCK                      (V4L2_CID_RF_TUNER_CLASS_BASE + 91)
 
 #endif