On Mon, Apr 17, 2023 at 1:11 PM Hans de Goede <hdegoede@xxxxxxxxxx> wrote: > +Cc Andy, Mika, Thanks for Cc'ing me. > On 4/16/23 17:49, Julian Winkler wrote: > > This id was removed in b47018a778c1a18cbc98b4a11936dec4f8c4bb7b, saying it > > is only used on Moorestown, but apparently the same id is also used on > > Medfield. > > > > Tested on the Medfield based Motorola RAZR i smartphone. Wow! This is surprising. Can you tell more about your test environment? What is the Linux kernel version in use and what is the userspace (AOSP, Buildroot, Yocto, custom)? If custom, more details would be nice to hear. > > Signed-off-by: Julian Winkler <julian.winkler1@xxxxxx> > > Hmm, so this is a former SFI platform, from your: > https://lore.kernel.org/all/20230223060107.23029-1-julian.winkler1@xxxxxx/ > > patch I guess the plan is to use some custom bootloader > and then use x86 with devicetree support to replace SFI ? That would also be nice to hear in detail. With other Intel MID platforms the decision was made to pursue ACPI (and U-Boot, as an example) supports that for Intel Merrifield platform. > Do you already have this working ? > > Sorry for all the questions for what is just a simple PCI-id > addition. I guess I'm worried this is just the tip of > the iceberg for getting medfield support back into > the kernel and I'm a bit worried about how much maintenance > work this will cause. > > E.g. also see commit e1da811218d2dc ("drm/gma500: Remove Medfield support") > which I guess you will want to see reverted too ? > > That is an example of a lot more code to bring back > then just a single PCI-id addition. > > Don't get me wrong I'm all for supporting older hw > if there are users who are interested in actively > maintaining support for it. I just want to get a feel > of the amount of work this is going to involve. > > Andy, Mika, any remarks ? I'm not against a patch if it helps existing users, but we need to understand first if it will be really helpful for upstream (taking into account 32-bit Intel MID support removal). -- With Best Regards, Andy Shevchenko
