Hi Simon, On Thu, Nov 26, 2015 at 12:52 AM, Simon Glass <s...@chromium.org> wrote: > Hi Bin, > > On 19 November 2015 at 20:38, Bin Meng <bmeng...@gmail.com> wrote: >> Hi Simon, >> >> On Fri, Nov 20, 2015 at 11:09 AM, Simon Glass <s...@chromium.org> wrote: >>> Hi, >>> >>> I'm wondering what might come next for U-Boot x86 support. >>> >>> The PCI conversion to driver model is coming along nicely. The ACPI >>> support is only partially there but it is a good start. > > I have another series of PCI patches in the works and hope to get > these out in a few weeks. The intent is to fully move x86 to use the > driver model API. > >>> >>> What else? More platforms? Other features? Better support for existing >>> platforms? >>> >> >> Two biggest feature gaps so far are complete ACPI support, and SMM >> support. ACPI is pretty much a must-have if we want power management >> feature in the OS. For SMM, I am not convinced that we have to do that >> in U-Boot, for example those BIOS guys invented USB legacy support >> (I/O port emulation of PS/2 keyboard) via SMM but today we have native >> USB support and we should not do such with SMM in U-Boot. One corner >> case is that some ACPI AML codes on some commercial BIOS trap the ACPI >> calls into SMM where SMM is a must-have. Unfortunately such >> limitations exist as there are still lots of unpublished chipset docs >> from various vendors who want to protect their IP (so-called). >> >> ACPI support seems to be a must if we want to support booting Windows, >> also we may need help from SeaBIOS (chain-loaded from U-Boot). > > Yes we should try to get that finished. It seems pretty close at least > on qemu and minnowboard max. > >> >> For other features, what I can think of now are: >> - New platform support which relies on FSP. With FSP it is quite easy >> to add a new platform support for Intel processors. >> - FSP spec 1.1 support, however Intel has not released any FSP package >> based on FSP spec 1.1. I believe their next gen Atom/Core processors' >> FSP will support FSP 1.1 (like Braswell, Skylake) > > Yes it seems like this will happen when we get the first board that supports > it. > >> - TPM support, and Intel TXT/TXE > > There is LPC TPM support at present so perhaps that is a start. > >> - xHCI support on Intel chipset (looks the U-Boot xHCI driver is not >> working for Intel) > > Agreed, this shouldn't be too tricky as it is a standard. > >> - Audio support (maybe just providing audio codec's verb table in U-Boot) > > There is basic speaker support, and on a few ARM boards there is basic > audio support (playing a waveform, and code to generate a waveform). > This is pretty platform-specific as each codec is different. Do you > have a board with a built-in audio codec? >
Looks Crown Bay and Bayley Bay boards have on-board audio codec. By supporting audio I mean to enable OS to have the audio functionality. I am not aware of U-Boot is able to play sound :) Regards, Bin _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
