Re: PowerPC agpmode issues

[Benjamin Herrenschmidt <benh@au1.ibm.com>]

On Sat, 2016-10-08 at 12:05 -0700, Herminio Hernandez, Jr. wrote:
> Performed an apt dist-upgrade and rebooted with agpmode=4 and still
> the GPU is failing with errors. Should I proceed to place a bug
> report on this?

I wouldn't even try to be honest. The HW issues in Apple AGP
implementation pretty much guarantee that things will crash
with the recent DRIs. Back when AGP memory was just a single
chunk of memory we got it to limp along but since DRI2 it's
pretty much hopeless.

I would stick to PCI GART even if it sucks for performances.

Cheers,
Ben.

> Herminio
> 
> On Tue, Sep 20, 2016 at 11:20 PM, Herminio Hernandez, Jr. <herminio.h
> ernandezjr@gmail.com> wrote:
> > I am still getting errors even with radeon.agpmode=4 is set
> > 
> > rican-linux@Debian-G5:~$ dmesg |grep -e radeom -e drm -e
> > radeon.agpmode
> > [    0.000000] Kernel command line: root=UUID=aeca9a67-31d7-4c4b-
> > a0f8-4db328b33305  radeon.agpmode=4
> > [    9.734366] [drm] Initialized drm 1.1.0 20060810
> > [   10.934519] [drm] radeon kernel modesetting enabled.
> > [   10.943743] fb: switching to radeondrmfb from OFfb ATY,Simone
> > [   10.954622] fb: switching to radeondrmfb from OFfb ATY,Simone
> > [   10.956515] [drm] initializing kernel modesetting (RV350
> > 0x1002:0x4150 0x1002:0x4150 0x00).
> > [   10.956552] [drm] register mmio base: 0xA0000000
> > [   10.956558] [drm] register mmio size: 65536
> > [   11.046327] [drm] Not an x86 BIOS ROM, not using.
> > [   11.046358] [drm] Using device-tree clock info
> > [   11.046369] [drm] AGP mode requested: 4
> > [   11.046528] [drm] Generation 2 PCI interface, using max
> > accessible memory
> > [   11.046582] [drm] Detected VRAM RAM=256M, BAR=256M
> > [   11.046587] [drm] RAM width 128bits DDR
> > [   11.046858] [drm] radeon: 64M of VRAM memory ready
> > [   11.046866] [drm] radeon: 256M of GTT memory ready.
> > [   11.046935] [drm] radeon: 1 quad pipes, 1 Z pipes initialized.
> > [   11.061306] [drm] Supports vblank timestamp caching Rev 2
> > (21.10.2013).
> > [   11.061312] [drm] Driver supports precise vblank timestamp
> > query.
> > [   11.061363] [drm] radeon: irq initialized.
> > [   11.061405] [drm] Loading R300 Microcode
> > [   11.110467] [drm] radeon: ring at 0x0000000000010000
> > [   11.257952] [drm:.r100_ring_test [radeon]] *ERROR* radeon: ring
> > test failed (scratch(0x15E4)=0xCAFEDEAD)
> > [   11.258060] [drm:.r100_cp_init [radeon]] *ERROR* radeon: cp
> > isn't working (-22).
> > [   11.404548] [drm:.r100_cp_fini [radeon]] *ERROR* Wait for CP
> > idle timeout, shutting down CP.
> > [   11.551199] [drm] radeon: cp finalized
> > [   12.547388] [drm] radeon: cp finalized
> > [   12.553854] [drm] radeon: ttm finalized
> > [   12.553861] [drm] Forcing AGP to PCI mode
> > [   12.643384] [drm] Not an x86 BIOS ROM, not using.
> > [   12.643406] [drm] Using device-tree clock info
> > [   12.643414] [drm] Generation 2 PCI interface, using max
> > accessible memory
> > [   12.643446] [drm] Detected VRAM RAM=256M, BAR=256M
> > [   12.643452] [drm] RAM width 128bits DDR
> > [   12.643712] [drm] radeon: 64M of VRAM memory ready
> > [   12.643719] [drm] radeon: 512M of GTT memory ready.
> > [   12.643761] [drm] GART: num cpu pages 8192, num gpu pages 131072
> > [   12.645324] [drm] radeon: 1 quad pipes, 1 Z pipes initialized.
> > [   12.645343] [drm] PCI GART of 512M enabled (table at
> > 0x0000000062F80000).
> > [   12.645462] [drm] Supports vblank timestamp caching Rev 2
> > (21.10.2013).
> > [   12.645468] [drm] Driver supports precise vblank timestamp
> > query.
> > [   12.645512] [drm] radeon: irq initialized.
> > [   12.645689] [drm] radeon: ring at 0x0000000090010000
> > [   12.793131] [drm:.r100_ring_test [radeon]] *ERROR* radeon: ring
> > test failed (scratch(0x15E4)=0xCAFEDEAD)
> > [   12.793235] [drm:.r100_cp_init [radeon]] *ERROR* radeon: cp
> > isn't working (-22).
> > [   12.939961] [drm:.r100_cp_fini [radeon]] *ERROR* Wait for CP
> > idle timeout, shutting down CP.
> > [   12.940193] [drm] radeon: cp finalized
> > [   12.944581] [drm] Connector Table: 12 (mac g5 9600)
> > [   12.944609] [drm] No valid Ext TMDS info found in BIOS
> > [   12.944621] [drm] No TV DAC info found in BIOS
> > [   12.944798] [drm] No TMDS info found in BIOS
> > [   12.944974] [drm] Radeon Display Connectors
> > [   12.944981] [drm] Connector 0:
> > [   12.944985] [drm]   DVI-I-1
> > [   12.944990] [drm]   HPD1
> > [   12.944995] [drm]   DDC: 0x64 0x64 0x64 0x64 0x64 0x64 0x64 0x64
> > [   12.945000] [drm]   Encoders:
> > [   12.945005] [drm]     DFP2: INTERNAL_DVO1
> > [   12.945010] [drm]     CRT2: INTERNAL_DAC2
> > [   12.945015] [drm] Connector 1:
> > [   12.945019] [drm]   DVI-I-2
> > [   12.945023] [drm]   HPD2
> > [   12.945028] [drm]   DDC: 0x60 0x60 0x60 0x60 0x60 0x60 0x60 0x60
> > [   12.945033] [drm]   Encoders:
> > [   12.945037] [drm]     DFP1: INTERNAL_TMDS1
> > [   12.945042] [drm]     CRT1: INTERNAL_DAC1
> > [   12.945046] [drm] Connector 2:
> > [   12.945051] [drm]   SVIDEO-1
> > [   12.945055] [drm]   Encoders:
> > [   12.945059] [drm]     TV1: INTERNAL_DAC2
> > [   13.028211] [drm] fb mappable at 0xB0040000
> > [   13.028229] [drm] vram apper at 0xB0000000
> > [   13.028234] [drm] size 8323072
> > [   13.028238] [drm] fb depth is 24
> > [   13.028243] [drm]    pitch is 7680
> > [   13.122329] radeon 0000:f0:10.0: fb0: radeondrmfb frame buffer
> > device
> > [   13.175092] [drm] Initialized radeon 2.43.0 20080528 for
> > 0000:f0:10.0 on minor 0
> > rican-linux@Debian-G5:~$ 
> > 
> > 
> > On Mon, Sep 19, 2016 at 11:20 PM, Michel Dänzer <michel@daenzer.net
> > > wrote:
> > > On 20/09/16 12:43 PM, Herminio Hernandez, Jr. wrote:
> > > >
> > > > Yes to both, however when I set radeon.agpmode=1 most of the
> > > time the
> > > > kernel freezes when booting. When I do get past that I get
> > > these errors:
> > > 
> > > [...]
> > > 
> > > > *[   11.415769] [drm:.radeon_agp_init [radeon]] *ERROR* Illegal
> > > AGP
> > > > Mode: 1 (valid 4, 8), leaving at 8*
> > > 
> > > As you can see, AGP 1x isn't supported by your setup, only 4x or
> > > 8x. How
> > > about radeon.agpmode=4?
> > > 
> > > 
> > > --
> > > Earthling Michel Dänzer               |               http://www.
> > > amd.com
> > > Libre software enthusiast             |             Mesa and X
> > > developer
> > > 
> > 
> > 
>