Hello there!
I think I have met a very similar problem. I built optee+aosp, android P . and the screen is always trun balck and display disorder.
My touch screen is powered by a DC charger sepatately not by using the usb, and uses usb for touch control, I can ensure there is no matter with my touch screen, because I have check it by plug in the computer and it works well.
It looks like this when it works not so well.
The image you have above seems like you’re missing the patch here:
https://android-review.googlesource.com/c/kernel/hikey-linaro/+/889696/Can you double check the source you built and confirm it has that change?
I double check source I built. There is no change in kirin_drm_overlay_utils.c. I changed the file according to link you sent. Finally, my screen is working.
. Before your last post, I think, kirin_drm_overlay_utils.c wasn’t changed in optee_android_manifest. Thanks
May be I can also solve it by doing this, but I am quite confused with the patch link, and have no idea on what to do. could someone give any advices? Please see this, thanks a lot.
The console always output these messages :
[23316.313503] hisi_ddr_devfreq ddr_devfreq: set down threshold:400000000
[23413.315175] type=1400 audit(1557913531.519:6674): avc: denied { dac_read_search } for pid=4842 comm=“main” capability=2 scontext=u:r:zygote:s0 tcontext=u:r:zygote:s0 tclass=capability permissive=1
[23413.332750] type=1400 audit(1557913652.935:6675): avc: denied { associate } for pid=2685 comm=“Binder:2685_2” name=“globalAlert” scontext=u:object_r:proc_net:s0 tcontext=u:object_r:proc:s0 tclass=file1
[24003.853503] hisi_ddr_devfreq ddr_devfreq: ddr bandwdith request: 0 / 28472
[24003.860583] hisi_ddr_devfreq ddr_devfreq: set down threshold:685000000
[24006.520075] hisi_ddr_devfreq ddr_devfreq: ddr bandwdith request: 0 / 28472
[24006.527134] hisi_ddr_devfreq ddr_devfreq: set down threshold:400000000
[24006.686566] hisi_ddr_devfreq ddr_devfreq: ddr bandwdith request: 0 / 28472
[24006.693497] hisi_ddr_devfreq ddr_devfreq: set down threshold:685000000
[24008.888370] hisi_ddr_devfreq ddr_devfreq: ddr bandwdith request: 0 / 28472
[24008.895336] hisi_ddr_devfreq ddr_devfreq: set down threshold:400000000
[24009.350387] hisi_ddr_devfreq ddr_devfreq: ddr bandwdith request: 0 / 28472
[24009.358427] hisi_ddr_devfreq ddr_devfreq: set down threshold:685000000
[24012.284305] hisi_ddr_devfreq ddr_devfreq: ddr bandwdith request: 0 / 28472
[24012.291279] hisi_ddr_devfreq ddr_devfreq: set down threshold:400000000
Is it normal and what these messages mean. Is it related to the screen problems?
