The MIPI DSI panel is encountering problems while transitioning from BSP 5 to BSP 6 on the Verdin 8M

[Rabeb]

Hi,

 I am currently involved in the migration process from BSP 5.x to BSP 6.5. I am utilizing the VerdIn8mm on a customized board. However, I am encountering difficulties in loading the display driver with BSP 6, as I am receiving error messages.

Any ideas on how to fix this problem with BSP6? It was working fine with BSP5. Thank you

[AldoG]

Hello,

I believe that you are using Toradex BSP, correct?
If so, I would recommend to also contact their support channel for assitance on this regard.

For the issue on the logs it reports that it failed to attach the bridge, have you compared for any driver changes between version, especifically on the device tree bindings.

Best regards/Saludos,
Aldo.

[Rabeb · Accepted solution]

Hello @AldoG ,thank you for your answer. I fixed the problem by creating a patch for the /gpu/drm/bridge/sec-dsim.c file. Here’s what I did.

I replaced this lines :

mvporch |= MVPORCH_SET_MAINVBP(vmode->vback_porch) | MVPORCH_SET_STABLEVFP(vmode->vfront_porch) | MVPORCH_SET_CMDALLOW(0x0);

with this lines

mvporch |= MVPORCH_SET_MAINVBP(vmode->vback_porch) | MVPORCH_SET_STABLEVFP(vmode->vfront_porch - 15) | MVPORCH_SET_CMDALLOW(0xf);

Then i added MIPI_DSI_MODE_VSYNC_FLUSH to dsi->mode_flags when setting mode, typically inside the panel driver.