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AMD Posts Navi Display Stream Compression Support For Linux

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  • AMD Posts Navi Display Stream Compression Support For Linux

    Phoronix: AMD Posts Navi Display Stream Compression Support For Linux

    One of the kernel-side features not yet in place for AMD's newest Navi graphics processors on Linux has been Display Stream Compression support but that is being squared away with a new patch series...

    http://www.phoronix.com/scan.php?pag...-Linux-Patches

  • #2
    Well hopefully 4k 144Hz is ready by the time big RDNA rolls off the line...

    Comment


    • #3
      From the article:
      "VESA's Display Stream Compression is for low-latency lossless compression performance for power-savings"

      DSC is not lossless, it is lossy compression (at about 1:3 ratio, if memory serves me well). VESA calls it 'visually lossless', but that means lossy, as even JPEG is often 'visually lossless'.

      I hate it when mindless journalists, like Michael Larabel, just copy-paste articles and sentences from other sources without VERIFYING THE CONTENTS and doing CRITICAL ANALYSIS.

      Oh, perhaps he just inadvetredly dropped the word 'visually'? No he didn't. He copy-pasted the article, without any thinking.

      Comment


      • #4
        It seems with all the work left for Navi, it is too much to ask for a single fix for pageflipping on at least Polaris.
        https://bugs.freedesktop.org/show_bug.cgi?id=110659

        Comment


        • #5
          Originally posted by xfcemint View Post
          From the article:
          "VESA's Display Stream Compression is for low-latency lossless compression performance for power-savings"

          DSC is not lossless, it is lossy compression (at about 1:3 ratio, if memory serves me well). VESA calls it 'visually lossless', but that means lossy, as even JPEG is often 'visually lossless'.

          I hate it when mindless journalists, like Michael Larabel, just copy-paste articles and sentences from other sources without VERIFYING THE CONTENTS and doing CRITICAL ANALYSIS.

          Oh, perhaps he just inadvetredly dropped the word 'visually'? No he didn't. He copy-pasted the article, without any thinking.
          I agree. This is the journalism equivalent of fast food. Michael, please do things better.

          Comment


          • #6
            Originally posted by xfcemint View Post
            From the article:
            "VESA's Display Stream Compression is for low-latency lossless compression performance for power-savings"

            DSC is not lossless, it is lossy compression (at about 1:3 ratio, if memory serves me well). VESA calls it 'visually lossless', but that means lossy, as even JPEG is often 'visually lossless'.

            I hate it when mindless journalists, like Michael Larabel, just copy-paste articles and sentences from other sources without VERIFYING THE CONTENTS and doing CRITICAL ANALYSIS.

            Oh, perhaps he just inadvetredly dropped the word 'visually'? No he didn't. He copy-pasted the article, without any thinking.
            + timofonic

            Or maybe you should get on your hands and knees and thank Michael Larabel for posting about 12 articles a day for free, many of which have vast amounts of original content, all for the pathetically low price of zero or 2 usd per month. That there are a few oversights here and there in even the best publications is completely routine (I worked as a journalist in tier 1 publications for numerous years).

            Tell me where else you get this level of high quality original Linux content, at any price, because I'd really like to know.

            Comment


            • #7
              Originally posted by vegabook View Post

              Or maybe you should get on your hands and knees and thank Michael Larabel for posting about 12 articles a day for free, many of which have vast amounts of original content, all for the pathetically low price of zero or 2 usd per month. That there are a few oversights here and there in even the best publications is completely routine (I worked as a journalist in tier 1 publications for numerous years).

              Tell me where else you get this level of high quality original Linux content, at any price, because I'd really like to know.
              Ok, you are right, Michael is doing a nice job and I like this site. (I probably sounded a bit too rash in that comment)

              But... that's not enough to satisfy me.

              I would rather take less articles with a bit higher quality that more articles with less quality.

              But, that's not what this is all about.

              Ok, Michael is certainly not 'mindless' as I said, but this kind of ommision hightlights that there are many gaps in his computing knowledge. He is not the worst, he is good, but he should improve. Especially on the theoretical side of things.

              In fact, I noticed another worrysome comment of his, recently, where he said that 720p resolution on a mobile phone is insufficient. I really dislike this kind of idiotic, knowledge-lacking journalism, just repeating what idiotic masses say and regurgitating the PR statements of greedy corporations (who don't mind selling you 'improved' smartphones).

              It just gets on my nerves.

              Comment


              • #8
                I am a little bit shocked - though I had expected something bad as it was announced on Phoronix in Oct. 2018 that Intel prepped Mesa for 5k+ for Icelake.
                That means currently neither Intel nor AMD would be capable of using [email protected], which is what I am looking for ...
                I want to buy a PC right now and even a specialist PC builder is not giving any answer - after stating that Raven Ridge was chipset limited in maxumum resolution - and now it's reported that not even Navi is capable of 8k (under Linux right now).
                It is ridiculous that I am using 4k at an Intel Haswell iGPU system of 2013 with a screen of 2015 - with 8k prototype screens being shown before I bought that screen - and neither screens nor PC graphics can be purchased being capable of [email protected] in 2019. That's a shame, isn't it.

                I would really like to hear from someone from AMD what "ODM Combine" problem is - and if any graphics APU or GPU HW is guaranteed to be capable of 8k,
                Navi or Vega, as Vega seems to be used in the current/coming desktop APUs.
                Maybe the Linux support may last a few months - to be hopefully available with Ubuntu 20.04 LTS release - which should be the target for Linux desktop usage.
                Or is this out of reach?

                On another note: Are there real specs for AMD graphics - as last time I checked on AMD website I saw "DisplayPort yes - HDMI yes" - so no experts buying AMD products? I expected DP 1.4 & HDMI 2.1 or similar.
                And maybe someone could make an expert guess how long one may have to wait for DP 2.0 to come to a real AMD product - late 2020?
                Michael could you please provide info if/when you test new APU or dGPU systems (like Ryzen 5 3400G) about max resolution with refresh rates, DP and HDMI port versions? I think this may be of general interest ...

                My focus with PCs is on working - I need resolution (and not muti-screen workarounds). I would doubt that no one else is longing for this ...
                One may think the only purpose of a capable APU/iGPU/dGPU is just gaming ... in FullHD - cough - that's not how it should be.
                At least even games will benefit from professional graphics.

                Comment


                • #9
                  8K is a niche. I just did a short research and my local gernan research tool found one (!) 8k Monitor for sale. For a lousy 2900 Euros.

                  https://geizhals.eu/?cat=monlcd19wide&xf=14591_76804320

                  8K totally didn't get into any relevance yet, and noone said AMD wouldn't get 8K working in the future.

                  Comment


                  • #10
                    I don't expect it'll be too long until we have a fix for the ODM issue but there was no reason to hold back the rest of the DSC patches.

                    Comment

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