[Intel-gfx] [PATCH]drm_i915: remove unnecessary object pin for mode set
jbarnes at virtuousgeek.org
Fri May 15 08:25:11 PDT 2009
On Fri, 15 May 2009 10:49:33 +0800
Shaohua Li <shaohua.li at intel.com> wrote:
> I get this log when using xrandr set display resolution in kms:
> [ 52.795810] [drm:i915_gem_object_unbind] *ERROR* Attempting to
> unbind pinned buffer [ 52.795824] ------------[ cut
> here ]------------ [ 52.795829] WARNING:
> at /workshop/kernel/git/my/linux/drivers/gpu/drm/i915/i915_gem_tiling.c:320
> i915_gem_set_tiling+0x3a9/0x412() [ 52.795836] Hardware name:
> Calistoga & ICH7M Chipset [ 52.795840] failed to unbind object for
> tiling switchModules linked in: [ 52.795851] Pid: 1991, comm: X Not
> tainted 2.6.30-rc5 #318 [ 52.795855] Call Trace: [ 52.795868]
> [<c02475f8>] warn_slowpath_fmt+0x77/0xa6 [ 52.795879]
> [<c0617e60>] ? _spin_unlock_irqrestore+0x1c/0x31 [ 52.795887]
> [<c0247b9a>] ? release_console_sem+0x180/0x1ad [ 52.795894]
> [<c0248078>] ? vprintk+0x2ab/0x2e0 [ 52.795905] [<c0292f64>] ?
> __generic_file_aio_write_nolock+0x3d4/0x40c [ 52.795913]
> [<c0615650>] ? printk+0x14/0x16 [ 52.795922] [<c043fbbf>] ?
> i915_gem_object_unbind+0x43/0x200 [ 52.795931] [<c0443e1f>]
> i915_gem_set_tiling+0x3a9/0x412 [ 52.795940] [<c042cd43>]
> drm_ioctl+0x215/0x29b [ 52.795947] [<c0443a76>] ?
> i915_gem_set_tiling+0x0/0x412 [ 52.795957] [<c02fffb7>] ?
> ext3_file_write+0x1f/0x90 [ 52.795966] [<c02b738a>] ?
> do_sync_write+0xb0/0xee [ 52.795976] [<c02c2744>]
> vfs_ioctl+0x55/0x6e [ 52.795985] [<c02c2bf3>]
> do_vfs_ioctl+0x496/0x4cf [ 52.795993] [<c02b7cee>] ?
> vfs_write+0xf5/0x109 [ 52.796002] [<c02c2c5d>] sys_ioctl+0x31/0x4a
> [ 52.796011] [<c021de70>] sysenter_do_call+0x12/0x22
> [ 52.796017] ---[ end trace 8cb90508f72e0a4d ]---
> dri_bo_unreference() try to free the front buffer and will set the
> tiling to NONE, but the bo is pined in intel_pipe_set_base(), so the
> warning is reported. It appears the bo isn't required to be pinned in
> intel_pipe_set_base(), as either 2d driver or intel fb will pin the
> front buffer, and the pin will confuse 2d driver.
> Signed-off-by: Shaohua Li <shaohua.li at intel.com>
Yes the 2D driver is confused here, but I'm pretty sure we want to keep
the pin in pipe_set_base. With KMS we shouldn't have to do userspace
pinning at all. I think this is really a 2D teardown problem, not a
Jesse Barnes, Intel Open Source Technology Center
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