DDR3 Swapping data lines and yocto configuration

[juanalbertogonz]

Hi,  

we are working with a custom board, that implemented data lines swapping,  the note says target DDR IC register read value must be transposed according to the data line swapping.

Where should I look to set this transpose value into the yocto configuration? Or how this transpose  is configured?

[igorpadykov]

Hi juanalbertogonz

regarding " target DDR IC register read value must be transposed according to the data line swapping." -

this is needed for reading MR registers of ddr part. For DDR3(L) memories such reading is not

used. So this may be ignored for DDR3(L).

Best regards
igor

[juanalbertogonz]

Thanks for the answer

[jamesbone · Accepted solution]

There is no need for additional mapping or software reconfiguration, as

it is done automatically. Bit swapping is described in sect.3.5.1 Swapping data lines IMX6DQ6SDLHDG

[juanalbertogonz]

Thanks for the answer