From mboxrd@z Thu Jan 1 00:00:00 1970 From: b.zolnierkie@samsung.com (Bartlomiej Zolnierkiewicz) Date: Fri, 22 Jun 2018 12:07:48 +0200 Subject: [PATCH V2 2/2] efi/fb: Convert PCI bus address to resource if translated by the bridge In-Reply-To: References: <1526653072-7153-1-git-send-email-okaya@codeaurora.org> <6376822.ENUjdQ58sn@amdc3058> Message-ID: <12969617.N13u7zUTf5@amdc3058> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Friday, June 22, 2018 09:54:22 AM Ard Biesheuvel wrote: > On 13 June 2018 at 18:08, Bartlomiej Zolnierkiewicz > wrote: > > On Wednesday, June 13, 2018 05:45:48 PM Ard Biesheuvel wrote: > >> On 18 May 2018 at 16:17, Sinan Kaya wrote: > >> > A host bridge is allowed to remap BAR addresses using _TRA attribute in > >> > _CRS windows. > >> > > >> > pci_bus 0000:00: root bus resource [mem 0x80100100000-0x8011fffffff window] (bus address [0x00100000-0x1fffffff]) > >> > pci 0000:02:00.0: reg 0x10: [mem 0x8011e000000-0x8011effffff] > >> > > >> > When a VGA device is behind such a host bridge and the resource is > >> > translated efifb driver is trying to do ioremap against bus address > >> > rather than the resource address and is failing to probe. > >> > > >> > efifb: probing for efifb > >> > efifb: cannot reserve video memory at 0x1e000000 > >> > efifb: framebuffer at 0x1e000000, using 1920k, total 1875k > >> > efifb: mode is 800x600x32, linelength=3200, pages=1 > >> > efifb: scrolling: redraw > >> > efifb: Truecolor: size=8:8:8:8, shift=24:16:8:0 > >> > > >> > Use the host bridge offset information to convert bus address to > >> > resource address in the fixup. > >> > > >> > Signed-off-by: Sinan Kaya > >> > >> Reviewed-by: Ard Biesheuvel > >> > >> Bartlomiej, could you please take these via the fbdev tree for v4.19? > > > > Sure, I will queue it after the current merge window. > > > >> Peter already gave his ack but Sinan dropped it (presumably because of > >> the split in v2) > > > > Peter, can I (re)add your ACK to V2 patches? > > > > Actually, it would be better if we could take this through the EFI > tree instead, with your ack. Would you mind? Fine with me. > There are some other efifb changes coming up, some of which depend on > core EFI changes, and taking these through different trees is going to > be more trouble than it's worth. Best regards, -- Bartlomiej Zolnierkiewicz Samsung R&D Institute Poland Samsung Electronics