IMX8MP 1280x800 HDMI Output

[justinnoel]

I have a 1280x800 HDMI display that requires the following timing. This is not in the list of out of the box mode lines.

Signal   Item                                               Symbol     Min.     Typ.     Max.  Unit
DCLK     Frequency                                     1/Tc            50      71        80     MHz
DE          Vertical Total Time                       TV              810     823    1023   TH
              Vertical Addressing Time            TVD            800   800    800    TH
              Horizontal Total Time                    TH              1360  1440   1800   Tc
              Horizontal Addressing Time         THD           1280  1280   1280   Tc

I was able to add a mode that displays the correct image, but the image flickers and goes in and out. What mode line and clock can I use to support this display? Thank you in advance!

[justinnoel]

I have added 1280x800 to the BSP, but I get flicker. I have seen other posts here where a tool is mentioned and clock/timing parameters are created. The solution involved adding a clock to samsung_phy_pll_cfg. Those posts have an 83.5Mzh clock, but as you see in my data sheet the max clock is 80Mzh I tired replying to another one of these posts, but I did not get a response. For example these posts mention editing samsung_phy_pll_cfg.

https://community.nxp.com/t5/i-MX-Processors/IMX8M-plus-1280-800-resolution/m-p/2000207#M231122

https://community.nxp.com/t5/i-MX-Processors/IMX8M-plus-1280-800-resolution/m-p/1732918

[Bio_TICFSL]

Hello,

Is not in the list in not supported, you should add it to the bsp.

Regards