The analogue gain (``x`` in the formula) is controlled through
``V4L2_CID_ANALOGUE_GAIN`` in this case.
+Alternate analogue gain model
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+The CCS defines another analogue gain model called alternate analogue gain. In
+this case, the formula to calculate actual gain consists of linear and
+exponential parts:
+
+ gain = linear * 2 ^ exponent
+
+The ``linear`` and ``exponent`` factors can be set using the
+``V4L2_CID_CCS_ANALOGUE_LINEAR_GAIN`` and
+``V4L2_CID_CCS_ANALOGUE_EXPONENTIAL_GAIN`` controls, respectively
+
**Copyright** |copy| 2020 Intel Corporation
#define V4L2_CID_CCS_ANALOGUE_GAIN_C0 (V4L2_CID_USER_CCS_BASE + 2)
#define V4L2_CID_CCS_ANALOGUE_GAIN_M1 (V4L2_CID_USER_CCS_BASE + 3)
#define V4L2_CID_CCS_ANALOGUE_GAIN_C1 (V4L2_CID_USER_CCS_BASE + 4)
+#define V4L2_CID_CCS_ANALOGUE_LINEAR_GAIN (V4L2_CID_USER_CCS_BASE + 5)
+#define V4L2_CID_CCS_ANALOGUE_EXPONENTIAL_GAIN (V4L2_CID_USER_CCS_BASE + 6)
#endif