Date: Wed, 25 Dec 2024 16:44:05 +0100 From: Mohammad Noureldin <mohammad@thelightbird.com> To: Mark Millard <marklmi@yahoo.com> Cc: freebsd-hackers <freebsd-hackers@freebsd.org> Subject: Re: USB4/TBT3 support [related side note?] Message-ID: <CAAQ96DwaBmdTHomqmCaK5bq5pcF5o2d_wMUrNfZ88DxaZuRT7A@mail.gmail.com> In-Reply-To: <5EC4A592-15B7-44EC-85F8-AA2CD0332062@yahoo.com> References: <5EC4A592-15B7-44EC-85F8-AA2CD0332062.ref@yahoo.com> <5EC4A592-15B7-44EC-85F8-AA2CD0332062@yahoo.com>
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--0000000000002bedc0062a1a1a62 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hi Mark! On Sun, Dec 22, 2024 at 11:56=E2=80=AFPM Mark Millard <marklmi@yahoo.com> w= rote: > Mohammad Noureldin <mohammad_at_thelightbird.com> wrote on > Date: Fri, 20 Dec 2024 16:04:20 UTC > > > . . . > > This is more a note about a context that may in some ways be somewhat > analogous, despite TBT3+ and USB4+ not being involved. > > The example that I have access to is a Windows DevKit 2023. It has > 3 USB-A ports and 2 USB-C ports. FreeBSD works with the USB-A ones > but not with the USB-C ones. (The FreeBSD loader work for all --via > the UEFI/ACPI, of course.) > > What seems to be unique that might contribute is that the 2 USB-C > ports also support HBR3 Transmission Mode (4 lane x 8.1 Gbps/lane) > that has support for: > > SST: 5120x2880 @ 60Hz, > SST: 4096x2160 @ 60Hz, > MST: (x2) 3840x2160 @ 60Hz (RB2), > MST: (x2) 2560x1600 @ 60Hz (CVT, RB) > > (Not that I use the USB-C ports at all. I stick to the USB-A > USB ports.) > > I'm not proposing that you make the Windows DevKit 2023 USB-C > ports work. I just do not not know how common such a combination > is for USB-C. It may be more of an aarch64 specific combination > rather than anything generalizing much to amd64. > > The Windows DevKit 2023 also has a mDP HBR2 port that I do use. > > =3D=3D=3D > Mark Millard > marklmi at yahoo.com > > I also can't judge if this would be (directly) related or not, so I will be taking a not of it but maybe discuss it over another generally USB related topic/thread. That said, I've took part in the discussion with you and @Flox (floxent) over FreeBSD Kernel Discord Channel and have been trying to test our assumptions with some of the machines I have, but no success to reproduce any of the reported issues. I am intending to text you and @Flox once I can find any new clues. Thanks Mark and happy holidays =F0=9F=91=8A --=20 Thanks - Mohammad Noureldin -- "Life is like riding a bicycle. To keep your balance you must keep moving" - Albert Einstein --0000000000002bedc0062a1a1a62 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable <div dir=3D"ltr"><div dir=3D"ltr"><div dir=3D"ltr"><div>Hi Mark!</div><br><= div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Sun, Dec= 22, 2024 at 11:56=E2=80=AFPM Mark Millard <<a href=3D"mailto:marklmi@ya= hoo.com" target=3D"_blank">marklmi@yahoo.com</a>> wrote:<br></div><block= quote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1= px solid rgb(204,204,204);padding-left:1ex">Mohammad Noureldin <<a href= =3D"http://mohammad_at_thelightbird.com" rel=3D"noreferrer" target=3D"_blan= k">mohammad_at_thelightbird.com</a>> wrote on<br> Date: Fri, 20 Dec 2024 16:04:20 UTC<br> <br> > . . .<br> <br> This is more a note about a context that may in some ways be somewhat<br> analogous, despite TBT3+ and USB4+ not being involved.<br> <br> The example that I have access to is a Windows DevKit 2023. It has<br> 3 USB-A ports and 2 USB-C ports. FreeBSD works with the USB-A ones<br> but not with the USB-C ones. (The FreeBSD loader work for all --via<br> the UEFI/ACPI, of course.)<br> <br> What seems to be unique that might contribute is that the 2 USB-C<br> ports also support HBR3 Transmission Mode (4 lane x 8.1 Gbps/lane)<br> that has support for:<br> <br> SST: 5120x2880 @ 60Hz,<br> SST: 4096x2160 @ 60Hz,<br> MST: (x2) 3840x2160 @ 60Hz (RB2),<br> MST: (x2) 2560x1600 @ 60Hz (CVT, RB)<br> <br> (Not that I use the USB-C ports at all. I stick to the USB-A<br> USB ports.)<br> <br> I'm not proposing that you make the Windows DevKit 2023 USB-C<br> ports work. I just do not not know how common such a combination<br> is for USB-C. It may be more of an aarch64 specific combination<br> rather than anything generalizing much to amd64.<br> <br> The Windows DevKit 2023 also has a mDP HBR2 port that I do use.<br> <br> =3D=3D=3D<br> Mark Millard<br> marklmi at <a href=3D"http://yahoo.com" rel=3D"noreferrer" target=3D"_blank= ">yahoo.com</a><br> <br></blockquote><div><br></div><div>I also can't judge if this would b= e (directly) related or not, so I will be taking a not of it but maybe disc= uss it over another generally USB related topic/thread.</div><div><br></div= ><div>That said, I've took part in the discussion with you and @Flox (<= span style=3D"font-family:"gg sans","Noto Sans","H= elvetica Neue",Helvetica,Arial,sans-serif;font-size:14px">floxent</spa= n>) over FreeBSD Kernel Discord Channel and have been trying to test our as= sumptions with some of the machines I have, but no success to reproduce any= of the reported issues.</div><div><br></div><div>I am intending to text yo= u and=C2=A0@Flox once I can find any new clues.</div><div><br></div><div>Th= anks Mark=C2=A0and happy holidays=C2=A0=F0=9F=91=8A</div></div><div><br></d= iv><span class=3D"gmail_signature_prefix">-- </span><br><div dir=3D"ltr" cl= ass=3D"gmail_signature"><div dir=3D"ltr"><div><div dir=3D"ltr" style=3D"col= or:rgb(136,136,136)">Thanks<br>- Mohammad Noureldin<br>--<br>"Life is = like riding a bicycle. To keep your balance you must keep moving"<br>-= Albert Einstein</div></div><div dir=3D"ltr" style=3D"color:rgb(136,136,136= )"><br></div></div></div></div> </div> </div> --0000000000002bedc0062a1a1a62--
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