DSI (MIPI) in TX2 1280x 800 Support ?

Robotics & Edge Computing Jetson & Embedded Systems Jetson TX2
1

Hi…

We made custom board TX2 with DSI 4 lane .

this is panel spec.
800 x 1280

HS Pulse with = 2
HS Back Porch = 48
HS Front Porch = 16 - 255

VS Pulse with = 4-255
VS Back Porch = 10
VS Front Porch = 15-255

DCLK = 69.5 (Typ.)

DSI-CLK +/ Double UI = 4ns -8ns ( 4lane)
DSI-CLK +/- UI halfs = 2ns- 8ns (4 lane)

there are working sequence by guide.

  1. add custom panel driver and follow power sequence
  2. modify device tree by panel datasheet.
    a. initial commands.
    b. horizontal vertical timing , refresh , etcs…

  1. datasheet X2 DSI Videomode 1280x800 is not support.
    can we use 1280x800 panel at TX2 ?

  2. PCLK(DCLK) can not make 69.5Mhz
    //if i change code DIV value in code.

  3. HS Clock is under 4ns .
    I saw HS Clock configured 20800 Khz. in dmesg
    can we change beside 2ns - 4ns ?

please help … answer ~

thanks.

2
  1. datasheet X2 DSI Videomode 1280x800 is not support.
    can we use 1280x800 panel at TX2 ?

→ What datasheet are you talking about?

3

hi. Wayne

What datasheet are you talking about?

24.7 Display Video Mode
The DSI supports the following video mode resolutions:
…

X2 TECHNICAL REFERENCE MANUAL
NVIDIA Parker Series SoC

thanks.

4

24.7 Display Video Mode
The DSI supports the following video mode resolutions:
…

X2 TECHNICAL REFERENCE MANUAL
NVIDIA Parker Series SoC

thanks.

5

If even TRM does not point out it in list, I would suggest not to use it.

6

We did debug . i write wrong dsi init sequence.

<TEGRA_DSI_SEND_FRAME 10> <---- i did ignore this.

is it send command ?

Thanks.