imx8qxp M4 does not output mipi dsi signal

[relax-wu]

Hi 

CPU: imx8qx6avlf
SDK: Android Q10.0.0_2.2.0_AUTO

At present, after Android is fully started, it can display normally and switch evs.
But when I just turned it on, I switched to evs, and M4 did not output mipi dsi signal.
Did not make much change, just refer to fsl_adv7535.c and fsl_max9286.c to transplant the drivers of DS90UB941/8 and NVP6324.

The attachment is the log information of the switching process.

Please help me, thanks

[igorpadykov]

Hi relax-wu

one can try to build with "userdebug" option to obtain more diagnosis capability, please look at
sect.3.2.2 Build mode selection Android™ User's Guide.

Best regards
igor

[relax-wu · Accepted solution]

The problem has been solved, compare the register configuration in the Linux driver nwl-dsi.c
Modify the width and height configuration in the M4 driver
#define APP_FRAME_HEIGHT 1920
#define APP_FRAME_WIDTH 1080
to
#define APP_FRAME_HEIGHT 1080
#define APP_FRAME_WIDTH 1920

[relax-wu]

I have selected mek_8q_car-userdebug. The current problem appears in the boot phase. During the M4 boot process (it has not released the display/camera, and has not been connected to Android), the mipi dsi of the M4 cannot be measured with the oscilloscope.