Problem with iMXRT1064 EVK + RIVERDI RVT70HSTNWC00-B 7inch display + GUIX

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Problem with iMXRT1064 EVK + RIVERDI RVT70HSTNWC00-B 7inch display + GUIX

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godcks91
Contributor I

We are facing similar issue like this thread ->  https://community.nxp.com/t5/i-MX-RT/i-MX-RT-eLCDIF-RGB-Mode-Use-Case/mp/981839

 

Configuration:

- 1024*600 display(RGB 565) - will convert it to RGB 888 later

- Using HS/VS mode instead of DE mode - As per RIVERDI display datasheet(attached)

- Started with sample example of RK043FN02H-CT display panel

 

Question -1: Are below setting correct?

godcks91_0-1682364951029.png

#define APP_HSW 1
#define APP_HFP 16
#define APP_HBP 160
#define APP_VSW 1
#define APP_VFP 1
#define APP_VBP 23

 

Question-2:

Below postDivider cannot be changed to 16 - We need Clock between 44.3 to 63.  postDivider = 16 does not make any change in the clock. Is there any limitation to below equation? When I use loopDivider = 27 and postDivider = 8 - screen glows to white.

godcks91_1-1682365034838.png

 

When I do additional changes for clock - as per below snip - screen stopped glowing white but show few random lines. My frame buffer was not fully set as I did not use SDRAM for frame buffer.

godcks91_4-1682365640482.png

Question-3:

I have tried to use SDRAM(32MB) area for Non-Cachable region to store Frame buffer. Configured SDRAM to 27MB and allocate 5MB to Non-Cachable region. Is there any issue with this configuration? When I used SDRAM region like this - screen stopped glowing white - nothing on the screen - even some debug print stopped coming.

godcks91_2-1682365403890.png

godcks91_3-1682365446119.png

I even tried with above setting and stopping I & D cache like below

godcks91_5-1682365728745.png

 

Question - 4:

Is it okay to use -> #define FRAME_BUFFER_ALIGN 32 ? In example provided with imxrt1064 evk - it is 64.

 

Can someone please help us? We are trying to solve above issues for many days without any luck.

Thank you in advance!

- CS

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