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1080p MIPi DSI support for i.MX8QM

Question asked by prashanth kumar on Aug 19, 2018
Latest reply on Aug 21, 2018 by igorpadykov


Kindly let me know the GUI packages/changes need to be do in yocto file system (Yocto Project 2.2-Morty) for supporting 1080p full HD for MIPI DSI using "LINUX-4.9.51". The MIPI display is getting proper if we configure resolution for 720p in kernel. But for 1080p configuration, GUI "Scaling" is not rendering properly on screen.


The timing parameter in kernel driver for MIPI DSI display 1080p as follows,


         .clock = 66000,

         .hdisplay = 1080,
        .hsync_start = 1106,
        .hsync_end = 1108,
        .htotal = 1144,
        .vdisplay = 1920,
        .vsync_start = 1928,
        .vsync_end = 1932,
        .vtotal = 1936,
        .vrefresh = 60,
        .flags = 0x0,
        .width_mm = 68,
        .height_mm = 121,


The Kernel driver we are using for MIPI DSI is "panel-raydium-rm68200.c". The same kernel driver is also configured for Android8.1.0(Android Oreo), in which the resolution 1080p MIPI DSI GUI is scaling properly.

Can anyone let me know the reasons for 1080p scaling problem in Yocto file system in linux.


Thanks in advance.
Best Regards,
Prashanth Kumar K