I'm not an AMD expert, but...

•

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Let's talk about developing AMD display drivers in the DRM subsystem as an external contributor. Part of this work is a trail of breadcrumbs to build documentation. What are those breadcrumbs? How do they help to review, fix, improve and enable features of AMD drivers? How would both sides benefit if those pieces of information were already documented? We are gathering information from anywhere and also bothering experts for input. Ultimately, this presentation focuses on AMD driver development but may fit DRM drivers of any GPU vendors. (c) X.Org Developer Conference (XDC) 2022 October 4-6, 2022 Minneapolis, Minnesota, USA https://indico.freedesktop.org/event/2/

Technology

“I’m not an AMD expert, but…”
Melissa Wen @ Igalia
XDC - Oct 2022

I’m not an AMD expert, but…
Melissa Wen, XDC 2022

I’m not an AMD expert, but…
Melissa Wen, XDC 2022
Trend topics not covered by this talk:
● Criticize code statistics
● Complain about the shared code approach of the display driver
● Put a curse on AMD

I’m not an AMD expert, but…
Presenter(s), Presentation Date
Being John Malkovich, 1999 Photograph: Allstar/Propaganda Films/Sportsphoto Ltd/Allstar

I’m not an AMD expert, but…
Melissa Wen, XDC 2022
Play the game you already know…
● KMS tests of the IGT testing tools
and have fun ﬁxing bugs
● DRM alpha blend mode
Follow traditional breadcrumbs
● documentation
● mailing list
● git history
● checking drivers from other vendors
● own experience

I’m not an AMD expert, but…
Melissa Wen, XDC 2022
DM
DRM

I’m not an AMD expert, but…
Melissa Wen, XDC 2022
DC
DM
DRM

Forget the Traditional
Breadcrumbs
Perspective-Taking
I’m not an AMD expert, but…
Melissa Wen, XDC 2022

I’m not an AMD expert, but…
Melissa Wen, XDC 2022
Credit: @PISCO_CAT/SPLITPICS UK
Credit: @PISCO_CAT/SPLITPICS UK

I’m not an AMD expert, but…
Melissa Wen, XDC 2022
Credit: @PISCO_CAT/SPLITPICS UK

"I want it all"
I’m not an AMD expert, but…
Melissa Wen, XDC 2022

"I want it all"
I’m not an AMD expert, but…
Melissa Wen, XDC 2022
Credit: DreamWorks AnimationS UK

I’m not an AMD expert, but…
Melissa Wen, XDC 2022
More transparency
● Merging changes to DC (the shared/OS-agnostic part)
○ Change limitations in some part of the code
○ Workarounds to attend DRM/KMS framework
○ DC implementations with no Linux support yet
○ Public CI (?)
● Upstream to DRM new features implementation
● More documentation is always welcome

I’m not an AMD expert, but…
Melissa Wen, XDC 2022
Complaints? Questions?

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2. I’m not an AMD expert, but… Melissa Wen, XDC 2022

3. I’m not an AMD expert, but… Melissa Wen, XDC 2022 Trend topics not covered by this talk: ● Criticize code statistics ● Complain about the shared code approach of the display driver ● Put a curse on AMD

4. I’m not an AMD expert, but… Presenter(s), Presentation Date Being John Malkovich, 1999 Photograph: Allstar/Propaganda Films/Sportsphoto Ltd/Allstar

5. I’m not an AMD expert, but… Melissa Wen, XDC 2022 Play the game you already know… ● KMS tests of the IGT testing tools and have fun ﬁxing bugs ● DRM alpha blend mode Follow traditional breadcrumbs ● documentation ● mailing list ● git history ● checking drivers from other vendors ● own experience

6. I’m not an AMD expert, but… Melissa Wen, XDC 2022

7. I’m not an AMD expert, but… Melissa Wen, XDC 2022

8. I’m not an AMD expert, but… Melissa Wen, XDC 2022

9. I’m not an AMD expert, but… Melissa Wen, XDC 2022

10. I’m not an AMD expert, but… Melissa Wen, XDC 2022 DM DRM

11. I’m not an AMD expert, but… Melissa Wen, XDC 2022 DC DM DRM

12. Forget the Traditional Breadcrumbs Perspective-Taking I’m not an AMD expert, but… Melissa Wen, XDC 2022

13. I’m not an AMD expert, but… Melissa Wen, XDC 2022

14. I’m not an AMD expert, but… Melissa Wen, XDC 2022

15. I’m not an AMD expert, but… Melissa Wen, XDC 2022

16. I’m not an AMD expert, but… Melissa Wen, XDC 2022 Credit: @PISCO_CAT/SPLITPICS UK Credit: @PISCO_CAT/SPLITPICS UK

17. I’m not an AMD expert, but… Melissa Wen, XDC 2022 Credit: @PISCO_CAT/SPLITPICS UK

18. I’m not an AMD expert, but… Melissa Wen, XDC 2022 Credit: @PISCO_CAT/SPLITPICS UK

19. I’m not an AMD expert, but… Melissa Wen, XDC 2022

20. I’m not an AMD expert, but… Melissa Wen, XDC 2022

21. "I want it all" I’m not an AMD expert, but… Melissa Wen, XDC 2022

22. "I want it all" I’m not an AMD expert, but… Melissa Wen, XDC 2022 Credit: DreamWorks AnimationS UK

23. I’m not an AMD expert, but… Melissa Wen, XDC 2022 More transparency ● Merging changes to DC (the shared/OS-agnostic part) ○ Change limitations in some part of the code ○ Workarounds to attend DRM/KMS framework ○ DC implementations with no Linux support yet ○ Public CI (?) ● Upstream to DRM new features implementation ● More documentation is always welcome

24. I’m not an AMD expert, but… Melissa Wen, XDC 2022 Complaints? Questions?

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