8-bit lcd parallel bus interface

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8-bit lcd parallel bus interface

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reuelhaavrahami
Contributor III

Hi

We have a 8-bit parallel bus LCD connected to EIM_A21 (DATA16) to EIM_D27(DATA23). The data to to be sent should be RGB565 but in a 8-bit in two clock clock cycles fashion. I know we should change the microcodes found in ipu_disp.c but I have no clue as of how to do this. We are using Linux 3.14.52.

I tried adding RGB565 to the same if statements for YUYV and added some changes to the _ipu_init_dc_mappings function. but it still does not give me two clock cycles per pixel.

Can someone please help.

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igorpadykov
NXP Employee
NXP Employee

Hi Reul

number of IPU clock cycles was available for programming in early IPU

versions, for example in i.MX31 IPU DI Display Access Cycles Count Register (DI_DISP_ACC_CC).

Below example of such microcodes programming

https://community.nxp.com/message/294603#294603 

Usually such kind of support can be provided with

NXP Professional Services|NXP 

Best regards
igor

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