diff options
Diffstat (limited to 'kernel/Documentation/DocBook/media/v4l/controls.xml')
| -rw-r--r-- | kernel/Documentation/DocBook/media/v4l/controls.xml | 20 |
1 files changed, 17 insertions, 3 deletions
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.</entry> <row> <entry><constant>V4L2_EXPOSURE_METERING_MATRIX</constant> </entry> <entry>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.</entry> </row> @@ -4863,7 +4863,7 @@ interface and may change in the future.</para> </note> <para> - 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 <constant>V4L2_CID_IMAGE_SOURCE_CLASS</constant>, 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.</para> </para> <table pgwide="1" frame="none" id="image-process-control-id"> - <title>Image Source Control IDs</title> + <title>Image Process Control IDs</title> <tgroup cols="4"> <colspec colname="c1" colwidth="1*" /> @@ -5418,6 +5418,18 @@ set. Unit is in Hz. The range and step are driver-specific.</entry> <entry spanname="descr">Enables/disables IF automatic gain control (AGC)</entry> </row> <row> + <entry spanname="id"><constant>V4L2_CID_RF_TUNER_RF_GAIN</constant> </entry> + <entry>integer</entry> + </row> + <row> + <entry spanname="descr">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.</entry> + </row> + <row> <entry spanname="id"><constant>V4L2_CID_RF_TUNER_LNA_GAIN</constant> </entry> <entry>integer</entry> </row> @@ -5425,6 +5437,8 @@ set. Unit is in Hz. The range and step are driver-specific.</entry> <entry spanname="descr">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 <constant>V4L2_CID_RF_TUNER_LNA_GAIN_AUTO</constant> is not set. +See <constant>V4L2_CID_RF_TUNER_RF_GAIN</constant> to understand how RF gain +and LNA gain differs from the each others. The range and step are driver-specific.</entry> </row> <row> |