On April 10, 2017 12:29:12 PM Chad Versace <chadversary@xxxxxxxxxxxx> wrote:
On Tue 04 Apr 2017, Keith Packard wrote:
Jason Ekstrand <jason@xxxxxxxxxxxxxx> writes:
> Interesting question. To my knowledge, no one has actually implemented the
> Vulkan WSI direct-to-display extensions. (I tried to prevent them from
> getting released with 1.0 but failed.) I believe the correct answer is to
> use the external memory dma-buf stuff that chad and I have been using and
> talk directly to KMS.
Sounds good, and minimizes the amount of code I have to write too :-)
I found an implementation. Nvidia's 2017-04-06 Linux driver release
notes claim newly added support for VK_EXT_direct_mode_diplay, which is
layered atop VK_KHR_display.
If it's useful to do so, we can always pull Keith's work into Mesa or even
put it in a layer. Let's start with an implementation and figure out the
Vulkan bits later. Of there's something interesting in NVIDIA's
extensions, we can let that guide the design of course.
http://www.nvidia.com/download/driverResults.aspx/117741/en-us
https://www.khronos.org/registry/vulkan/specs/1.0-extensions/html/vkspec.html#VK_EXT_direct_mode_display
> I see no good reason to have a large abstraction in
> the middle.
Other than 'it's a standard', neither do I.
Yup.
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