aosp fail to enter ui due to pixel format issue #9
Description
testing on aosp boot shows a failure in minigbm/hwcomposer complainling pixel format query of hdr capability failed.
the issue happened when enabling drm_simple and drm_fredrreno driver altogether and caused init loop.
the root cause is still unknown. a workaround is applied to disable drm_simple driver. this is not very fancy because drm_simple fb driver can show boot log early.
further nailed down to remove a property of drm_simple fb device tree named 'format'. the value is argb8888. After this value removed both drm_simple and drm_freedereno transition works fine and freedereno works with aosp ui.
A gut feeling is 'format' property of drm_simple carried forward to drm_freedereno and limited the capability of hw. Thus AOSP aquire advanced format resulted failure.
This might be a bug in transition logic or drm_fredereno dealing with presets format.
Since those mailing lists are subscription only I can't report this issue to either kernel msm group or free desktop drm group. But I will report to irc linux-msm see if any insider can notify those dev soon.