[Bug 83996] New: [drm:r100_ring_test] *ERROR* radeon: ring test failed - since linux-3.17_rc1 on RS690/RS740 [Radeon 2100]

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=83996

          Priority: medium
            Bug ID: 83996
          Assignee: dri-devel at lists.freedesktop.org
           Summary: [drm:r100_ring_test] *ERROR* radeon: ring test failed
                    - since linux-3.17_rc1 on RS690/RS740 [Radeon 2100]
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: jospezial at gmx.de
          Hardware: Other
            Status: NEW
           Version: DRI CVS
         Component: DRM/Radeon
           Product: DRI

This bug report is a fork of https://bugs.freedesktop.org/show_bug.cgi?id=82588


This do I get on a AMD64 Gentoo linux with xf86-video-ati-7.4.0 since
linux-3.17_rc1.
X starts but GPU acceleration is disabled.

[    6.787592] [drm] Initialized drm 1.1.0 20060810
[    7.007890] [drm] radeon kernel modesetting enabled.
[    7.008441] [drm] initializing kernel modesetting (RS740 0x1002:0x796E
0x105B:0x0E13).
[    7.008456] [drm] register mmio base: 0xFEAF0000
[    7.008457] [drm] register mmio size: 65536
[    7.009087] ATOM BIOS: ATI
[    7.009102] radeon 0000:01:05.0: VRAM: 128M 0x0000000038000000 -
0x000000003FFFFFFF (128M used)
[    7.009104] radeon 0000:01:05.0: GTT: 512M 0x0000000040000000 -
0x000000005FFFFFFF
[    7.009117] [drm] Detected VRAM RAM=128M, BAR=128M
[    7.009118] [drm] RAM width 128bits DDR
[    7.009204] [TTM] Zone  kernel: Available graphics memory: 443784 kiB
[    7.009206] [TTM] Initializing pool allocator
[    7.009212] [TTM] Initializing DMA pool allocator
[    7.009235] [drm] radeon: 128M of VRAM memory ready
[    7.009236] [drm] radeon: 512M of GTT memory ready.
[    7.009251] [drm] GART: num cpu pages 131072, num gpu pages 131072
[    7.025657] [drm] radeon: 1 quad pipes, 1 z pipes initialized.
[    7.025670] [drm] PCIE GART of 512M enabled (table at 0x0000000032F00000).
[    7.025726] radeon 0000:01:05.0: WB enabled
[    7.025730] radeon 0000:01:05.0: fence driver on ring 0 use gpu addr
0x0000000040000000 and cpu addr 0xffff880032ea5000
[    7.025733] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[    7.025734] [drm] Driver supports precise vblank timestamp query.
[    7.025744] [drm] radeon: irq initialized.
[    7.025753] [drm] Loading RS690/RS740 Microcode
[    7.071137] [drm] radeon: ring at 0x0000000040001000
[    7.228868] [drm:r100_ring_test] *ERROR* radeon: ring test failed
(scratch(0x15E4)=0xCAFEDEAD)
[    7.228875] [drm:r100_cp_init] *ERROR* radeon: cp isn't working (-22).
[    7.228883] radeon 0000:01:05.0: failed initializing CP (-22).
[    7.228888] radeon 0000:01:05.0: Disabling GPU acceleration
[    7.375499] [drm:r100_cp_fini] *ERROR* Wait for CP idle timeout, shutting
down CP.
[    7.521222] Failed to wait GUI idle while programming pipes. Bad things
might happen.
[    7.521467] [drm] radeon: cp finalized

With linux-3.16.x it works.
lspci:
01:05.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] RS740
[Radeon 2100]


some messages from Xorg.log:

[    24.729] (--) RADEON(0): Chipset: "ATI RS740" (ChipID = 0x796e)
[    24.729] (II) RADEON(0): GPU accel disabled or not working, using shadowfb
for KMS

[    24.869] (WW) RADEON(0): Direct rendering disabled
[    24.869] (II) RADEON(0): Acceleration disabled

[    24.871] (WW) RADEON(0): Option "AccelMethod" is not used

[    24.879] (II) AIGLX: Screen 0 is not DRI2 capable
[    24.879] (EE) AIGLX: reverting to software rendering
[    25.578] (II) AIGLX: Loaded and initialized swrast
[    25.578] (II) GLX: Initialized DRISWRAST GL provider for screen 0



Result of bisecting between v3.16 and v3.17-rc1:

77497f2735ad6e29c55475e15e9790dbfa2c2ef8 is the first bad commit
commit 77497f2735ad6e29c55475e15e9790dbfa2c2ef8
Author: Michel Dänzer <michel.daenzer at amd.com>
Date:   Thu Jul 17 19:01:07 2014 +0900

    drm/radeon: Pass GART page flags to radeon_gart_set_page() explicitly

    Signed-off-by: Michel Dänzer <michel.daenzer at amd.com>
    Reviewed-by: Christian König <christian.koenig at amd.com>
    Signed-off-by: Alex Deucher <alexander.deucher at amd.com>

:040000 040000 7da27ed892f4ea02ef8e758eda7165ce336d19cc
369d9e0ff185b6e6c9614de87296fc60072f56b9 M      drivers
:040000 040000 c3203bef4546e1781ba218fa5232c12cd2a883a2
b655879d0fefad7b591333930fddfd3cc67afa8d M      include

Reverting that whole patch on v3.17-rc5 is not as easy because then compile
fails.

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