1.. SPDX-License-Identifier: GPL-2.0
2
3The Rockchip Image Signal Processor Driver (rkisp1)
4===================================================
5
6Versions and their differences
7------------------------------
8
9The rkisp1 block underwent some changes between SoC implementations.
10The vendor designates them as:
11
12- V10: used at least in rk3288 and rk3399
13- V11: declared in the original vendor code, but not used
14- V12: used at least in rk3326 and px30
15- V13: used at least in rk1808
16- V20: used in rk3568 and beyond
17
18Right now the kernel supports rkisp1 implementations based
19on V10 and V12 variants. V11 does not seem to be actually used
20and V13 will need some more additions but isn't researched yet,
21especially as it seems to be limited to the rk1808 which hasn't
22reached much market spread.
23
24V20 on the other hand will probably be used in future SoCs and
25has seen really big changes in the vendor kernel, so will need
26quite a bit of research.
27
28Changes from V10 to V12
29-----------------------
30
31- V12 supports a new CSI-host implementation but can still
32  also use the same implementation from V10
33- The module for lens shading correction got changed
34  from 12bit to 13bit width
35- The AWB and AEC modules got replaced to support finer
36  grained data collection
37
38Changes from V12 to V13
39-----------------------
40
41The list for V13 is incomplete and needs further investigation.
42
43- V13 does not support the old CSI-host implementation anymore
44