| Friday, July 12th, 2019, 00:09 UTC | ||
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| [07:05:24] | markk_: | warpme_: sorry – was out all day yesterday. I should have mentioned that my gut feeling is that the lima issue is somewhere in the shader. The black screen is a classic symptom of a shader issue. If it was the texturing there would be gl errors and you would likely get something on screen – even if it was green:). So encouraging that Qiang suspects shader compiler. |
| [07:07:16] | markk_: | presumably when he says black screen – that is just for the video playback portion? For that trace there should be a second or so of navigating a couple of menu screens followed by a few seconds of SD playback (that shows a pendulum swinging) |
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| [08:07:17] | warpme_: | markk_: thx returning to me :-) |
| [08:08:46] | warpme_: | I already explain to Qiang that UI works OK and this is playback where issue is. I have high hopes basing on my previous work with Qiang when we were working to get GUI to working OK |
| [08:16:47] | warpme_: | I see current mesa supports gles3.2 – so iirc – maybe there is possibility to go with rendering via egl dmabuf import as additinal option to drm-prime. I mean thing like on slide 31 in https://www.slideshare.net/ennael/embedded-re . . . xime-jourdan |
| [08:23:18] | warpme_: | also I saw some details in slide 19 onwards in https://archive.fosdem.org/2018/schedule/even . . . as_Rusak.pdf |
| [08:24:58] | warpme_: | i’m saying gles3.2 required as iirc i saw somwhere that 3.2 is required to have it working….. |
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| [10:23:45] | stuarta: | now why is the rpi buster build selecting opengl rather than opengles ? |
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| [10:57:27] | warpme_: | stuarta: I think maybe because buster gl provider is mesa – not rpi blobs – so qt (which detects whats to offer to apps basing on what gl provier) provides full desktiop gl instead of gles? |
| [10:58:52] | warpme_: | provier->provides |
| [11:02:19] | stuarta: | warpme_: it's more a configure issue, anyway, it's fixed in render branch, so i'm not going to look too hard at it |
| [11:04:10] | warpme_: | ah – i forgot you are refering to master – not render2019! |
| [11:04:15] | stuarta: | :) |
| [11:06:15] | warpme_: | indeed – markk done excellent work on gl caps. auto-detection. If qt provides only gles – myth automatically starting to use only gles. I’m using this as default in arm builds |
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| [11:22:33] | markk_: | warpme_: re dma buf import – to be honest – that was the route I was going to take. i.e. drm prime buffer -> egl -> gl texure. Should all be zero copy and slots straight into the current rendering setup. I may look at prime layers at some point – but no real understanding at the moment of how it works and how it would integrate with the regular gl rendering. |
| [11:23:24] | markk_: | also worth noting that, per slide show, they still fallback to gl render stuff when the driver doesn't properly handle scaling/colourspace conversion etc. |
| [11:24:18] | markk_: | I can see prime rendering being a mess of inconsistent presentation, workarounds etc |
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| [12:00:05] | warpme_: | markk_: indeed. drm-prime is at so early stage that aval.info is rather „notes from the battle field†than proper doc. for developers. On one hand it is quite elegant concept. On the other hand – functionally quite fragmeneted (every crtc hw offer it’s given set of caps. sometimes without scaling, sometimes without colour space converssions). Maintaining this for multiple platforms with single software can be challange. In this context |
| [12:00:06] | warpme_: | indeed EGL with GBM seems to be nice unification…. As mesa team doing now incredible things for arm 3d hw blocks (lima, panfrost progressing really well). qualcom and freescale already mainlined – egl path is best way to go! |
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| [19:25:29] | gigem: | markspieth2: I just tried mythtv over a vpn. Caveats, I have 150 mbps connection at work, 100 mpbs at home and 10 ms ping time between them. Except for some micro stuttering, it performed very well. The stuttering might be from my display running at 59.85 Hz instead of 59.94 or 60 Hz. |
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