[Bug 66714] New: Mobility Radeon HD 5650 doesn't boot with kernel 3.10 (and newer) when using radeon.audio=1

[bugzilla-daemon@freedesktop.org]

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https://bugs.freedesktop.org/show_bug.cgi?id=66714

          Priority: medium
            Bug ID: 66714
          Assignee: dri-devel@lists.freedesktop.org
           Summary: Mobility Radeon HD 5650 doesn't boot with kernel 3.10
                    (and newer) when using radeon.audio=1
          Severity: critical
    Classification: Unclassified
                OS: Linux (All)
          Reporter: mail@3v1n0.net
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: XOrg CVS
         Component: DRM/Radeon
           Product: DRI

If I enable the HDMI audio using the Mobility Radeon HD 5650 card with kernel
3.10.0 (or newer), I get a kernel oops that prevents me to boot.

This is a regression, since everything is fine with kernel 3.9.0.

Also, when I enable the switchable graphics in the bios, the notebook boots but
as soon as I use vgaswitcheroo to switch to the discrete card, I still get a
black screen and the system can't be used (when restoring the integrate card,
it goes back to work).

This is the kernel failure I've found:
Jul 8 23:23:03 tricky kernel: [ 30.386559] BUG: unable to handle kernel NULL
pointer dereference at (null)
Jul 8 23:23:03 tricky kernel: [ 30.386626] IP: [<ffffffffa024be90>]
evergreen_hdmi_enable+0x20/0x90 [radeon]
Jul 8 23:23:03 tricky kernel: [ 30.386715] PGD 0
Jul 8 23:23:03 tricky kernel: [ 30.386731] Oops: 0000 [#1] SMP
Jul 8 23:23:03 tricky kernel: [ 30.387209] CPU: 2 PID: 2184 Comm: Xorg Not
tainted 3.10.0-996-generic #201307020454
Jul 8 23:23:03 tricky kernel: [ 30.387260] Hardware name: Acer Aspire
4820TG/JM41_CP, BIOS V1.25 03/16/2011
Jul 8 23:23:03 tricky kernel: [ 30.387306] task: ffff88022c33ddc0 ti:
ffff88022f3d2000 task.ti: ffff88022f3d2000
Jul 8 23:23:03 tricky kernel: [ 30.387354] RIP: 0010:[<ffffffffa024be90>]
[<ffffffffa024be90>] evergreen_hdmi_enable+0x20/0x90 [radeon]
Jul 8 23:23:03 tricky kernel: [ 30.387447] RSP: 0018:ffff88022f3d3b68 EFLAGS:
00010246
Jul 8 23:23:03 tricky kernel: [ 30.387482] RAX: ffff88022b02de00 RBX:
ffff88022b02ea00 RCX: 0000000000000007
Jul 8 23:23:03 tricky kernel: [ 30.387529] RDX: 0000000000000000 RSI:
0000000000000000 RDI: ffff88022b02ea00
Jul 8 23:23:03 tricky kernel: [ 30.387575] RBP: ffff88022f3d3b78 R08:
0000000000000023 R09: 0000000000000022
Jul 8 23:23:03 tricky kernel: [ 30.387621] R10: ffff88022b724880 R11:
0000000000000000 R12: ffff88022b1f0000
Jul 8 23:23:03 tricky kernel: [ 30.387667] R13: ffff88022bb13000 R14:
ffff88022bb13000 R15: ffff8802307e6000
Jul 8 23:23:03 tricky kernel: [ 30.387716] FS: 00007f34c3505980(0000)
GS:ffff88023bc80000(0000) knlGS:0000000000000000
Jul 8 23:23:03 tricky kernel: [ 30.387768] CS: 0010 DS: 0000 ES: 0000 CR0:
0000000080050033
Jul 8 23:23:03 tricky kernel: [ 30.387807] CR2: 0000000000000000 CR3:
000000022ed44000 CR4: 00000000000007e0
Jul 8 23:23:03 tricky kernel: [ 30.387854] DR0: 0000000000000000 DR1:
0000000000000000 DR2: 0000000000000000
Jul 8 23:23:03 tricky kernel: [ 30.387901] DR3: 0000000000000000 DR6:
00000000ffff0ff0 DR7: 0000000000000400
Jul 8 23:23:03 tricky kernel: [ 30.387947] Stack:
Jul 8 23:23:03 tricky kernel: [ 30.387963] ffff88022b1f0000 ffff88022bb13000
ffff88022f3d3ba8 ffffffffa0252f3f
Jul 8 23:23:03 tricky kernel: [ 30.388016] ffff88022b02ea00 ffff88022bb13478
ffff88022bb13000 00000000ffffffde
Jul 8 23:23:03 tricky kernel: [ 30.388070] ffff88022f3d3bd8 ffffffffa010ab3a
ffff88022e4b7cf0 ffff8802307e6000
Jul 8 23:23:03 tricky kernel: [ 30.388122] Call Trace:
Jul 8 23:23:03 tricky kernel: [ 30.388173] [<ffffffffa0252f3f>]
radeon_atom_encoder_disable+0x15f/0x170 [radeon]
Jul 8 23:23:03 tricky kernel: [ 30.388231] [<ffffffffa010ab3a>]
drm_helper_disable_unused_functions+0x14a/0x190 [drm_kms_helper]
Jul 8 23:23:03 tricky kernel: [ 30.388295] [<ffffffffa010c5fe>]
drm_crtc_helper_set_config+0x95e/0xb50 [drm_kms_helper]
Jul 8 23:23:03 tricky kernel: [ 30.388357] [<ffffffffa00931f8>] ?
ttm_bo_vm_fault+0x288/0x3f0 [ttm]
Jul 8 23:23:03 tricky kernel: [ 30.388420] [<ffffffffa01effec>] ?
radeon_ttm_fault+0x5c/0x70 [radeon]
Jul 8 23:23:03 tricky kernel: [ 30.388482] [<ffffffffa0040fec>]
drm_mode_set_config_internal+0x5c/0xe0 [drm]
Jul 8 23:23:03 tricky kernel: [ 30.388540] [<ffffffffa0043cd8>]
drm_mode_setcrtc+0x2e8/0x540 [drm]
Jul 8 23:23:03 tricky kernel: [ 30.388589] [<ffffffff811617e6>] ?
handle_pte_fault+0x96/0x230
Jul 8 23:23:03 tricky kernel: [ 30.388639] [<ffffffffa003352a>]
drm_ioctl+0x50a/0x650 [drm]
Jul 8 23:23:03 tricky kernel: [ 30.388689] [<ffffffffa00439f0>] ?
drm_mode_setplane+0x3f0/0x3f0 [drm]
Jul 8 23:23:03 tricky kernel: [ 30.390589] [<ffffffff8109339c>] ?
account_user_time+0x9c/0xb0
Jul 8 23:23:03 tricky kernel: [ 30.392510] [<ffffffff811b2368>]
do_vfs_ioctl+0x88/0x340
Jul 8 23:23:03 tricky kernel: [ 30.394435] [<ffffffff811b26b1>]
SyS_ioctl+0x91/0xb0
Jul 8 23:23:03 tricky kernel: [ 30.396255] [<ffffffff8171822f>]
tracesys+0xe1/0xe6
Jul 8 23:23:03 tricky kernel: [ 30.397670] Code: d6 de ff eb 9b e8 91 d0 e0 e0
90 66 66 66 66 90 55 48 89 e5 48 83 ec 10 48 8b 87 50 01 00 00 40 84 f6 48 8b
90 08 01 00 00 75 20 <80> 3a 00 74 5c c6 02 00 48 8b 80 08 01 00 00 49 c7 c0 69
b4 2c
Jul 8 23:23:03 tricky kernel: [ 30.400952] RIP [<ffffffffa024be90>]
evergreen_hdmi_enable+0x20/0x90 [radeon]
Jul 8 23:23:03 tricky kernel: [ 30.402658] RSP <ffff88022f3d3b68>
Jul 8 23:23:03 tricky kernel: [ 30.404355] CR2: 0000000000000000
Jul 8 23:23:03 tricky kernel: [ 30.411223] ---[ end trace cf93979ade0a2572 ]---

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