Re: radeon_fbdev_river_fbdev: failed to initialize framebuffer and setup emulation

["Limonciello, Mario" <Mario.Limonciello@amd.com>]

On 8/7/25 9:10 AM, Christian Zigotzky wrote:
> I bisected today.
> 
> git clone https://gitlab.freedesktop.org/drm/kernel a
> 
> git bisect start
> 
> git bisect good 2f29b5c231011b94007d2c8a6d793992f2275db1
> (Good: video: screen_info: Relocate framebuffers behind PCI bridges)
> 
> git bisect bad f62408efc8669b82541295a4611494c8c8c52684
> (Bad: drm/xe/vf: Disable CSC support on VF)
> 
> 4d4c10f763d7808fbade28d83d237411603bca05 is the first bad commit
> commit 4d4c10f763d7808fbade28d83d237411603bca05
> Author: Mario Limonciello <mario.limonciello@amd.com>
> Date:   Wed Apr 23 23:31:32 2025 -0500
> 
>      PCI: Explicitly put devices into D0 when initializing
> 
>      AMD BIOS team has root caused an issue that NVMe storage failed to come
>      back from suspend to a lack of a call to _REG when NVMe device was 
> probed.
> 
>      112a7f9c8edbf ("PCI/ACPI: Call _REG when transitioning D-states") added
>      support for calling _REG when transitioning D-states, but this only 
> works
>      if the device actually "transitions" D-states.
> 
>      967577b062417 ("PCI/PM: Keep runtime PM enabled for unbound PCI 
> devices")
>      added support for runtime PM on PCI devices, but never actually
>      'explicitly' sets the device to D0.
> 
>      To make sure that devices are in D0 and that platform methods such as
>      _REG are called, explicitly set all devices into D0 during 
> initialization.
> 
>      Fixes: 967577b062417 ("PCI/PM: Keep runtime PM enabled for unbound 
> PCI devices")
>      Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
>      Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
>      Tested-by: Denis Benato <benato.denis96@gmail.com>
>      Tested-By: Yijun Shen <Yijun_Shen@Dell.com>
>      Tested-By: David Perry <david.perry@amd.com>
>      Reviewed-by: Rafael J. Wysocki <rafael@kernel.org>
>      Link: https://patch.msgid.link/20250424043232.1848107-1- 
> superm1@kernel.org
> 
>   drivers/pci/pci-driver.c |  6 ------
>   drivers/pci/pci.c        | 13 ++++++++++---
>   drivers/pci/pci.h        |  1 +
>   3 files changed, 11 insertions(+), 9 deletions(-)
> 
> I bisected with a ATi Radeon 7000 / VE (-device ati-vga,model=rv100) :-)
> 
>> On 04 August 2025 at 06:26 pm, mad skateman <madskateman@gmail.com> wrote:
>>
>> 
>> I am using the R580 chip which is the Radeon X1950 XT.
>>
>> The board i am using is a T1042 PowerPC based one with e5500 core.
>>
>> I also lost the ability to start Xorg and therefore just a blank screen.
>>
>> Dave
>>
>>
>>
>>
>>
>> Op ma 4 aug 2025, 18:04 schreef Christian Zigotzky 
>> <chzigotzky@xenosoft.de <mailto:chzigotzky@xenosoft.de>>:
>>
>>
>>     On 04 August 2025 at 04:42 pm, Alex Deucher wrote:
>>     > On Sun, Aug 3, 2025 at 11:28 AM Christian Zigotzky
>>     > <chzigotzky@xenosoft.de <mailto:chzigotzky@xenosoft.de>> wrote:
>>     >>
>>     >> Hello,
>>     >>
>>     >> I have the same issue on another machine either. Blank screen
>>     during the
>>     >> boot. The Radeon graphics framebuffer device doesn't work anymore.
>>     >>
>>     >> Here is the modifed code from the DRM updates (drm-
>>     next-2025-07-30):
>>     >>
>>     >> -
>>     >> https://web.git.kernel.org/pub/scm/linux/kernel/git/torvalds/
>>     linux.git/diff/drivers/gpu/drm/radeon/radeon_fbdev.c?
>>     id=260f6f4fda93c8485c8037865c941b42b9cba5d2 <https://
>>     web.git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/
>>     diff/drivers/gpu/drm/radeon/radeon_fbdev.c?
>>     id=260f6f4fda93c8485c8037865c941b42b9cba5d2>
>>     >> -
>>     >> https://web.git.kernel.org/pub/scm/linux/kernel/git/torvalds/
>>     linux.git/diff/drivers/gpu/drm/radeon/radeon_drv.c?
>>     id=260f6f4fda93c8485c8037865c941b42b9cba5d2 <https://
>>     web.git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/
>>     diff/drivers/gpu/drm/radeon/radeon_drv.c?
>>     id=260f6f4fda93c8485c8037865c941b42b9cba5d2>
>>     >
>>     > This change just bumps the driver version it shouldn't affect
>>     the fbdev.
>>     >
>>     >> -
>>     >> https://web.git.kernel.org/pub/scm/linux/kernel/git/torvalds/
>>     linux.git/diff/drivers/gpu/drm/radeon/radeon_display.c?
>>     id=260f6f4fda93c8485c8037865c941b42b9cba5d2 <https://
>>     web.git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/
>>     diff/drivers/gpu/drm/radeon/radeon_display.c?
>>     id=260f6f4fda93c8485c8037865c941b42b9cba5d2>
>>     >> -
>>     >> https://web.git.kernel.org/pub/scm/linux/kernel/git/torvalds/
>>     linux.git/diff/drivers/gpu/drm/radeon/evergreen_cs.c?
>>     id=260f6f4fda93c8485c8037865c941b42b9cba5d2 <https://
>>     web.git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/
>>     diff/drivers/gpu/drm/radeon/evergreen_cs.c?
>>     id=260f6f4fda93c8485c8037865c941b42b9cba5d2>
>>     >
>>     > This only affects acceleration, it should not affect fbdev.
>>     >
>>     > What chip are you using?  Can you attach your full dmesg
>>     output?  Can
>>     > you bisect?  This cultrit could be a core drm change.
>>     >
>>     > Alex
>>     >
>>     >>
>>     >> Do you have a patch for reverting these modifications? I would
>>     like to
>>     >> revert these modifications for testing.
>>     >>
>>     >> Thanks in advance,
>>     >> Christian
>>     >>
>>     >> On 03 August 2025 at 1:35 pm, Christian Zigotzky wrote:
>>     >>> Hello,
>>     >>>
>>     >>> Xorg doesn't work after the DRM updates drm-next-2025-07-30.
>>     >>>
>>     >>> Error messages:
>>     >>>
>>     >>> [dr:.radeon_fbdev_river_fbdev_proe] *ERROR* failed to initialize
>>     >>> framebuffer -22
>>     >>> radeon 0000:01:0.0: [drm] *ERRO* fbdev: Failedto setup
>>     emulaton (ret=-22)
>>     >>> brd module loadedm
>>     >>> lop: module loadd
>>     >>> mpt3ss version 52.10.00.00 loaded
>>     >>> nve nvme0: pci fuction 0002:04:0.0
>>     >>> fsl-sata ffe20000.sata: SataFSL Platform/CS Driver init
>>     >>> scs host0: sata_fs
>>     >>> ta1: SATA max DMA/133 irq 68 pm-pol 0
>>     >>> ;21;39mfsl-sat ffe221000.sata Sata FSL Platfrm/CSB Driver iit
>>     >>> ata1: Signatue Update detectd @ 0 msecs
>>     >>> scsihost1: sata_fsl[0m
>>     >>> ta2: SATA max UMA/133 irq 69 lm-pol 0
>>     >>> nvme nvm0: 4/0/0 defaul/read/poll queus
>>     >>> nvme0n1: p1 p p3 p4 p5 p6 p7[0m
>>     >>> drm:.radeon_fbdv_driver_fbdev_robe] *ERROR* filed to initialze
>>     >>> framebuffer 22
>>     >>> fsl_dpaa_mac fe4e6000.ethernt: of_get_mac_adress(/soc@ffe00000/
>>     >>> fman@40000/ethernet@e6000 failed
>>     >>> radeon 000:01:00.0: [dr] *ERROR* fbdev Failed to setu
>>     emulation (ret-22)
>>     >>> fsl_dpaa_ma ffe4e6000.ethenet: FMan MEMAC[0m
>>     >>> sl_dpaa_mac ffee6000.ethernet:Using random MA address: 0e
>>     >>>
>>     >>> Could you please check the latest DRM updates?
>>     >>>
>>     >>> Thanks,
>>     >>> Christian
>>     >>>
>>     >>
>>
>>     Hello Alex,
>>
>>     Thanks for your answer.
>>
>>     I use a BARTS chip (Radeon HD6870). I would like to bisect but I
>>     don't
>>     have time for it currently. Sorry
>>
>>     There are some other user reports:
>>
>>     - https://forum.hyperion-entertainment.com/viewtopic.php?
>>     p=60606#p60606 <https://forum.hyperion-entertainment.com/
>>     viewtopic.php?p=60606#p60606>
>>     - https://forum.hyperion-entertainment.com/viewtopic.php?
>>     p=60595#p60595 <https://forum.hyperion-entertainment.com/
>>     viewtopic.php?p=60595#p60595>
>>
>>     They use other Radeon graphics chips.
>>
>>     Bug report: https://github.com/chzigotzky/kernels/issues/15
>>     <https://github.com/chzigotzky/kernels/issues/15>
>>
>>     What do you think about the following commit?
>>
>>     Link:
>>     https://web.git.kernel.org/pub/scm/linux/kernel/git/torvalds/
>>     linux.git/commit/?id=0e7d5874fb6b80c44be3cfbcf1cf356e81d91232
>>     <https://web.git.kernel.org/pub/scm/linux/kernel/git/torvalds/
>>     linux.git/commit/?id=0e7d5874fb6b80c44be3cfbcf1cf356e81d91232>
>>
>>     @Hypex
>>     Could you please attach your full dmesg output?
>>
>>     Thanks,
>>     Christian
>>

Does applying 
https://github.com/torvalds/linux/commit/907a7a2e5bf40c6a359b2f6cc53d6fdca04009e0 
help?