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Issue #2322

open

Display panel "LDO25" regulator using 2.8v instead of 3.3v

Added by Denis 'GNUtoo' Carikli about 2 months ago. Updated about 2 months ago.

Status:
New
Priority:
Normal
Assignee:
-
Category:
Graphics
Target version:
Start date:
10/07/2022
Due date:
% Done:

0%

Estimated time:
Resolution:
Device:
Galaxy S 3 (I9300), Galaxy S 3 4G (I9305)
Grant:
Type of work:
Actions #1

Updated by Denis 'GNUtoo' Carikli about 2 months ago

I was notified on IRC that the LCD regulator is too low:

14:57 < jack_kekzoz[m]> GNUtoo: I think I found an error in the galaxy-s3 dtsi. Ldo25 should be 3.3V not 2.8V
14:58 < jack_kekzoz[m]> See 
https://github.com/LineageOS/android_kernel_samsung_smdk4412/blob/cm-14.1/arch/arm/mach-exynos/midas-power.c#L410-L473

Actions #2

Updated by Denis 'GNUtoo' Carikli about 2 months ago

  • Category set to Graphics
  • Target version changed from Any Replicant version with an upstream kernel to Replicant 11.0 0001
  • Device Galaxy S 3 (I9300), Galaxy S 3 4G (I9305) added
  • Device deleted (Unknown)
  • Type of work deleted (Unknown)

Once the bug is fixed in Replicant 11, the fix will then need to be upstreamed, so we will should them move this bugreport to the upstream subproject.

Actions #3

Updated by Denis 'GNUtoo' Carikli about 2 months ago

Maybe it's also related to the graphics glitch we got before.

Actions #4

Updated by Denis 'GNUtoo' Carikli about 2 months ago

  • Subject changed from regulator using 2.8v instead of 3.3v to Display panel "LDO25" regulator using 2.8v instead of 3.3v
Actions #5

Updated by Jack K about 2 months ago

I think the voltage was correct for Trats2, which is where the dtsi data for midas devices was forked from. The midas-power.c board file downstream has 2.8V for ldo25 for the "redwood" device, which is apparently another Exynos4412 Tizen device, GT-I8800.

Jack K

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