On Wed, Jul 12, 2023 at 12:24 PM Jagan Teki <jagan@xxxxxxxxxxxxxxxxxxxx> wrote: > > On Thu, Jul 13, 2023 at 12:22 AM Tim Harvey <tharvey@xxxxxxxxxxxxx> wrote: > > > > Greetings, > > > > 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 > > > > 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? > > What if you can revert or drop the dynamic PHY configuration (HEAD ... > a617b33f7e51)? can you check it? > > Thanks, > Jagan. Hi Jagan, That's one of the first things I tried but it didn't revert cleanly so I simply did a git checkout of 1a56fcf08ae4 (the patch before a617b33f7e51) as that was the before the 6 samsung-dsim patches I suspected. This version also failed but then I did a git log and noticed only 90 patches before the Linux 6.4-rc1 tag. This of course predates Linux 6.4 yet a617b33f7e51 was not in 6.4 which is why I got confused when a git bisect between v6.4 and v6.5-rc1 started bisecting to patches that pre-dated v6.4. I'm so confused at this point :) best regards, Tim
