1080p MIPi DSI support for i.MX8QM

[prashanthkumar]

Hi,

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

[igorpadykov]

Hi Prashanth

one can try to tweak MIPi DSI lcd timings in linux/drivers/gpu/drm/panel/panel-raydium-rm67191.c

panel-raydium-rm67191.c\panel\drm\gpu\drivers - linux-imx - i.MX Linux kernel 

Best regards
igor
-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------

[prashanthkumar]

Hi,

I have also tried with "panel-raydium-rm67191.c" kernel driver, but the result is same as previous in linux platform. Kindly let me know any GUI packages/x-y dimension changes need to be do in yocto file system, because if the same driver configured in android platform means GUI is coming properly on screen.

Best Regards,
Prashanth Kumar K

[igorpadykov]

Hi Prashanth

i.MX8QM is not publicly released and yet not supported.

Support for preproduction parts can be provided through Professional Services
NXP Professional Services|NXP 

Best regards
igor