Mark yao <mark....@rock-chips.com> writes: > On 2016年11月15日 02:32, Eric Anholt wrote: >> Mark yao <mark....@rock-chips.com> writes: >> >>> Hi Eric >>> >>> We found some display problem when rotate the screen. >>> >>> You can see the abnormal display picture on attachment. >>> >>> Bug reproduce step: >>> 1, run lubuntu session. >>> 2, rotate screen: xrandr --output eDP-1 --rotate right >>> 3, run lxterminal, enter some message, move the lxterminal, then you >>> can find font become abnormal. >>> >>> We try that: >>> 1, disable glamor, looks good, no problem. >>> 2, use screenshot to catch abnormal display, the screenshot picture is >>> normal, no problem. >>> 3, use x86 desktop pc(OpenGL), run same display with glamor, no >>> problem. >>> >>> Our testing environment: >>> rk3399 board: >>> CPU: arm64 >>> GPU: mali t86x(mali ddk r9p0, EGL 1.4, opengles 2.x) >>> >>> Eric, seem this problem only happen on EGL context, do you see this >>> problem before? I don't know how to debug for it, >>> Can you help us to analysis it? >> glamor has never worked correctly on GLES2 that I know of. Have you run >> the X Test suite on the X Server master branch against your stack to >> validate it? The texture transfers were broken, in my experience, and >> would need wrappers to format-convert inside of X. >> >> With proper open source drivers we get desktop GL, so nobody else has >> been working on GLES support. > Sadly hear this, I found gles is support on glamor source code, how does > the gles develop? > > With some hack, Currently Now glamor works mostly fine on our boards, so > we want to use glamor > on our project, but we have few experience about it, about the rotate > bug, maybe something wrong > on the texture transfers, but we don't know to debug it, can you give > some guide about it.
I was going to suggest trying to reproduce under Xephyr -glamor_gles2 so that you could take an apitrace and try to track down if there's a draw call going wrong and whether it's your driver for glamor at fault. However, xrandr -x under Xephyr -glamor is crashing for me. I still highly recommend running the test suite in your environment as the first step in validating that your stack works.
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