On 7/12/23 20:52, Tim Harvey wrote:
Greetings,
Tim,
I've noticed a regression in 6.5-rc1 that I'm having trouble bisecting
between 6.4 with regards to imx8mm MIPI DSI.
I'm testing on an imx8mm-venice-gw72xx-0x with the following display:
- Powertip PH800480T013-IDF02 compatible panel
- Toshiba TC358762 compatible DSI to DBI bridge
- ATTINY based regulator used for backlight controller and panel enable
You mean RPi 7" display wired to non-RPi hardware like many people do ? ;-)
I'm using a dt overlay to support this [1] which works on 6.4 but on
6.5-rc1 I get the following error:
[ 6.110585] samsung-dsim 32e60000.dsi: xfer timed out: 29 06 00 00
64 01 05 00 00 00
[ 6.326588] tc358762 32e60000.dsi.0: error initializing bridge (-110)
I'm trying to bisect this for some reason. Does anyone have any idea
what may be causing this or how I can debug it?
Try and do something like ...
git revert --no-edit v6.4..v6.5-rc1 -- drivers/gpu/drm/bridge/tc358762.c
drivers/gpu/drm/bridge/samsung-dsim.c drivers/regulator/*attiny*.c
(I might have the filenames wrong)
Does that start working afterward ?
If so, you can reverse-bisect on the reverts.
I wouldn't be surprised if this was somehow related to the non-burst
mode delay calculation again, sigh.
[...]
