alyssa changed the topic of #panfrost to: Panfrost - FLOSS Mali Midgard & Bifrost - Logs https://freenode.irclog.whitequark.org/panfrost - <daniels> avoiding X is a huge feature
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<tomeu> ayaka: that kernel repo was abandoned once panfrost got merged into mainline
<tomeu> ayaka: you probably want to ask with question in #linux-rockchip
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<ayaka> tomeu, then that is not necessary
<ayaka> tomeu, as linux rockhip is not an official channel also I am sure the backport for lts 4.4 is closed
<chewitt> ayaka: the only kernel driver for panfrost is in https://github.com/torvalds/linux/commits/master
<chewitt> if you wanted to backport the driver onto Rockchip BSP kernel(s) .. that would be something for Rockchip kernel maintainers to handle
<chewitt> and I assume you know who those people are :)
<ayaka> I just want to make some commit that when someone using vendor kernel could adopt this driver easily
<ayaka> using a upstream kernel would be a big deal for them
<ayaka> now I know there is not a proper place for that, I know should forget this kind of though now
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<chewitt> ayaka I would expect the current driver to depend on memory things that are not present in the BSP codebase
<chewitt> better option would be to work on porting the nand and camera drivers :)
<chewitt> the stateless/vdec drivers are quite good shape now - although the userspace side (ffmpeg) is not really upstream yet
<chewitt> there's a V4L2 love-fest/bring-up party happening in LE slack #raspberrypi channel for the last couple of months
<chewitt> I think you still have access, so feel free to ask Q's on status there
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<ayaka> chewitt, well I was working on the that stateless driver, I am sure its performance is worse than vendor one
<ayaka> besides the gstreamer plugins bad has a v4l2 plugin for those stateless driver
<ayaka> I don't think it would be worst to port that
<chewitt> from what I understand the current stateless support is v1.0 .. enough for actual implementations to start
<chewitt> but once people implement, all the performance and niche cases come up, so there will be changes/improvements
<ayaka> sorry, I didn't notice who you are
<chewitt> then there is the "coordinated ballet" (aka cat-herding) exercise of aligning all the different implementations
<chewitt> ahh.. hello :)
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<danboid> Is panfrost running on a Mali T720 capable of 4K 60 fps video playback, when using cedrus for hw decoding?
<danboid> I've got a HDMI 2.0 120 Hz TV that needs exploiting :)
<HdkR> The GPU doesn't decode video
<HdkR> It's a 3D accelerator only
<HdkR> There are other hardware blocks on your SoC that does video decoding
<danboid> Does the xserver not matter?
<danboid> xorg driver
<HdkR> Panfrost doesn't even do display output unless you're compositing something
<HdkR> That's another hardware block
<danboid> I want to use mpv on a Orange Pi 3, do you know if it would be able to handle 60 fps h265 decoding as promised on the spec sheet?
<ayaka> Mali T720 won't be able to render a UHD 30HZ output
<ayaka> it would be luckily that it could reach 24fps
<danboid> So it can decode a 4K but ony output 1080?
<danboid> I've read that the H3 / H6 socs can decode 4K h264 and h265 in hardware
<danboid> but thats not much use if it can't display 4K smoothly
<Werner> decoding a video stream does not necessarily mean to display it through a video output
<danboid> Thats what most people want it for
<danboid> So is there no accelerted 2D X server for Mali T7XX
<HdkR> Mali is only a 3D accelerator
<danboid> OK so is glamor known to work with panfrost?
<HdkR> glamor will work
<danboid> At 4K?
<HdkR> Not well
<danboid> OK, sounds like the Tegra is still king of the ARM GPU hill then
<HdkR> Sure, if you get a Xavier then it'll stomp Mali
<danboid> but are you saying on of the Mali GPUs is better than the GPU in the nano?
<HdkR> Ones in high end SoCs yes
<HdkR> But those also typically don't go in to SBCs
<danboid> Which soc is this?
<HdkR> Kirin 9000, Samsung Exynos 2100
<HdkR> Comparing a low-end SoC to a flagship SoC from a company known for making overpowered hardware isn't really fair :)
<danboid> Maybe not, I'm just looking into the state of hardware accelerated video decoding for ARM Linux
<danboid> It seems the NVIDIA boards are the only game in town really
<danboid> Someone says something good about NVIDIA SHOCKER!!
<amonakov> I don't quite understand why the level of developer support for Mali and Adreno has not improved in the years of booming Android sales
<amonakov> (don't tell me it would have been even worse otherwise, because I don't see how it possibly could be worse)
<HdkR> It could be worse
<adjtm_> I don't see how
<HdkR> PowerVR could be dominant
<adjtm_> they are waiting to the right moment to write open source drivers for their gpus
<adjtm_> I don't understand why took so long for the companies using the mesa drivers instead of the closed source ones (because I assume that new qcom phones use freedreno)
<amonakov> ah. and Vivante I guess. but one dominant player is not worse for developers than two+ shiity players!
* alyssa isn't sure this is on-topic here...
<adjtm_> alyssa, sorry
<chewitt> if that works, you know where to steal all the patches for whatever project you have
<chewitt> it's about as bleeding edge as you'll get for Allwinner H/W decoding
<chewitt> and further discussion can move to #libreelec channel
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<macc24> i think terraria does something that kills mali gpus
<macc24> on g72 it's slow too
<anarsoul> is it slow on intel graphics?
<macc24> no
<macc24> my duet's gpu outperforms ironlake by a great margin, but it can't play terraria at speed that ironlake can do
<macc24> it's under half frames per second than ironlake could co
<macc24> do*
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<alyssa> I wonder how much benefit we could get from disabling clean_pixel_write_enable when it's safe to do so
<alyssa> I guess the problem is it's not usually safe to do so on Midgard due to a hw erratum...
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