From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sinan Kaya Subject: Re: [PATCH V2 2/2] efi/fb: Convert PCI bus address to resource if translated by the bridge Date: Wed, 13 Jun 2018 10:22:04 -0400 Message-ID: <26470c5c-55db-9dff-3794-4e4a96c8bcb6@codeaurora.org> References: <1526653072-7153-1-git-send-email-okaya@codeaurora.org> <1526653072-7153-2-git-send-email-okaya@codeaurora.org> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1526653072-7153-2-git-send-email-okaya@codeaurora.org> Content-Language: en-US Sender: linux-kernel-owner@vger.kernel.org To: linux-fbdev@vger.kernel.org, timur@codeaurora.org, ard.biesheuvel@linaro.org Cc: linux-arm-msm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Peter Jones , Bartlomiej Zolnierkiewicz , "open list:FRAMEBUFFER LAYER" , open list List-Id: linux-arm-msm@vger.kernel.org Hi Ard, On 5/18/2018 10:17 AM, 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 > --- I didn't see any messages about these getting picked up for 4.18. Are they queued on your own branch? Sinan -- Sinan Kaya Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm Technologies, Inc. Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project.