vc4: 7" LCD touchscreen not supported

[anholt]

The DSI1 connector isn't enabled yet. drm-vc4-dsi-boot is the WIP for it, but currently writes to the device don't appear to take effect.

[destans]

+1

[kika123]

Some registers are locked down by the firmware, like the ones used for OTP access

[nnexai]

+1

[LittleKita]

+1

[Cardhu]

+1

[anholt]

Progress on this: drm-vc4-dsi-boot configures most of the of the vc4 hardware for the panel, and console and X work.

It doesn't successfully initialize if the panel wasn't enabled at boot (tested using ignore_lcd=1 in config.txt) and doesn't control the Toshiba chip on the panel (so DPMS results in the panel flipping out due to pixels no longer showing up when they should).

[AndreeeCZ]

+1

[zarr]

Any guesstimates on this hitting upstream? I tried merging with rpi-4.6.y to test, but I probably failed as the result doesn't boot. It gets to a black screen with some random flashing characters every few seconds.

[anholt]

@zarr since the code isn't done, just merging upstream wouldn't work.

[bird43]

Any progress on this?

[greyltc]

Hi @anholt,
I have an official DSI display connected to my pi3 using the latest rasbian (with HDMI not connected)
Is it still the case that there's no way to use your VC4 driver here?
When I boot with this configuration, I get a blank screen.

Is there anything that I should add to my config.txt (besides what rasbi-config adds when I enable your driver via that)?

Would it help if I provided any logs or diagnostic output for you?