X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=kernel%2FDocumentation%2FDocBook%2Fmedia%2Fv4l%2Fcontrols.xml;h=f13a429093f174c406b293a5ca21e8e4d1526e47;hb=e09b41010ba33a20a87472ee821fa407a5b8da36;hp=4e9462f1ab4cc04ea68fd9c89bccb7b2e11c01b8;hpb=9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00;p=kvmfornfv.git
diff --git a/kernel/Documentation/DocBook/media/v4l/controls.xml b/kernel/Documentation/DocBook/media/v4l/controls.xml
index 4e9462f1a..f13a42909 100644
--- a/kernel/Documentation/DocBook/media/v4l/controls.xml
+++ b/kernel/Documentation/DocBook/media/v4l/controls.xml
@@ -3414,7 +3414,7 @@ giving priority to the center of the metered area.
V4L2_EXPOSURE_METERING_MATRIX
A multi-zone metering. The light intensity is measured
-in several points of the frame and the the results are combined. The
+in several points of the frame and the results are combined. The
algorithm of the zones selection and their significance in calculating the
final value is device dependent.
@@ -4863,7 +4863,7 @@ interface and may change in the future.
- The Image Source control class is intended for low-level control of
+ The Image Process control class is intended for low-level control of
image processing functions. Unlike
V4L2_CID_IMAGE_SOURCE_CLASS, the controls in
this class affect processing the image, and do not control capturing
@@ -4871,7 +4871,7 @@ interface and may change in the future.
- Image Source Control IDs
+ Image Process Control IDs
@@ -5417,6 +5417,18 @@ set. Unit is in Hz. The range and step are driver-specific.
Enables/disables IF automatic gain control (AGC)
+
+ V4L2_CID_RF_TUNER_RF_GAIN
+ integer
+
+
+ The RF amplifier is the very first
+amplifier on the receiver signal path, just right after the antenna input.
+The difference between the LNA gain and the RF gain in this document is that
+the LNA gain is integrated in the tuner chip while the RF gain is a separate
+chip. There may be both RF and LNA gain controls in the same device.
+The range and step are driver-specific.
+
V4L2_CID_RF_TUNER_LNA_GAIN
integer
@@ -5425,6 +5437,8 @@ set. Unit is in Hz. The range and step are driver-specific.
LNA (low noise amplifier) gain is first
gain stage on the RF tuner signal path. It is located very close to tuner
antenna input. Used when V4L2_CID_RF_TUNER_LNA_GAIN_AUTO is not set.
+See V4L2_CID_RF_TUNER_RF_GAIN to understand how RF gain
+and LNA gain differs from the each others.
The range and step are driver-specific.