[Gta04-owner] Where did /dev/dri/card0 and /dev/fb0 run off to?

Lukas Maerdian luk at slyon.de
Mon Jun 25 09:39:34 CEST 2018


Am 22.06.2018 um 18:49 schrieb Josua Mayer:
> Good day to you all,
> 
> While again looking into where I left off with replicant a few months
> ago, I came across a big blocker that more or less prevents any
> meaningful work:
> Neither /dev/fb0 nor /dev/dri/* do exist.
> How can we find out why that happens?
> 
> Versions:
> I am using my own kernel branch based on letux-4.17.2 instead of the
> previously known-working version work/lukas/android-4.10.
> I wanted to minimize the number of patches on the android kernel, and be
> closer to upstream while potentially debugging problems in
> drm_hwcomposer and how it talks to /dev/dri/card0.
> 
> In that previous 4.10 tree I notice this commit:
> commit 00702c5e70b8adb8c1b0c116f1d4a41e3569ada1
> boot:dts: disable display1/tv0 to make /dev/graphics/fb0 appear
> 
> I checked its diff, and all it does is remove an alias from device-tree,
> so it does not really seem to disable anything.
> And sure enough, applying this change in my DTBs makes no difference to
> the issue of missing /dev/fb0 (and dri).
> 
> Lukas, do you remember what the idea behind that commit was?

Hi Josua,

thanks for your continued work!
Unfortunately I cannot remember the details behind this commit..

Best,
  Lukas

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