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Diffstat (limited to 'Documentation/userspace-api')
| -rw-r--r-- | Documentation/userspace-api/media/drivers/dw100.rst | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/Documentation/userspace-api/media/drivers/dw100.rst b/Documentation/userspace-api/media/drivers/dw100.rst index 1ca6fa55f539..fceea6ece622 100644 --- a/Documentation/userspace-api/media/drivers/dw100.rst +++ b/Documentation/userspace-api/media/drivers/dw100.rst @@ -66,4 +66,19 @@ map. More details on the DW100 hardware operations can be found in *chapter 13.15 DeWarp* of IMX8MP_ reference manual. +The Vivante DW100 m2m driver implements the following driver-specific control: + +``V4L2_CID_DW100_DEWARPING_16x16_VERTEX_MAP (__u32 array)`` + Specifies to DW100 driver its dewarping map (aka LUT) blob as described in + *chapter 13.15.2.3 Dewarping Remap* of IMX8MP_ reference manual as an U32 + dynamic array. The image is divided into many small 16x16 blocks. If the + width/height of the image is not divisible by 16, the size of the + rightmost/bottommost block is the remainder. The dewarping map only saves + the vertex coordinates of the block. The dewarping grid map is comprised of + vertex coordinates for x and y. Each x, y coordinate register uses 16 bits + (UQ12.4) to record the coordinate address, with the Y coordinate in the + upper bits and X in the lower bits. The driver modifies the dimensions of + this control when the sink format is changed, to reflect the new input + resolution. + .. _IMX8MP: https://www.nxp.com/webapp/Download?colCode=IMX8MPRM |