[Bug 65495] [GM45] bsd ring reset fails

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=65495

--- Comment #16 from lu hua <huax.lu at intel.com> ---
(In reply to comment #15)
> Created attachment 81860 [details] [review]
> run full gem hw init after gpu resets
> 
> Hopefully I haven't botched the testing on my side again, but this seems to
> actually work. Please test, thanks.

Fixed by this patch.
output:
rings stopped
gpu hang correctly dectected

dmesg:
[  195.724135] [drm:i915_ring_stop_set], Stopping rings 0x0000000f
[  195.726451] [drm:i915_driver_open],
[  195.726467] [drm:intel_crtc_cursor_set], cursor off
[  195.726470] [drm:intel_crtc_set_config], [CRTC:3] [FB:37] #connectors=1 (x
y) (0 0)
[  195.726476] [drm:intel_modeset_stage_output_state], [CONNECTOR:5:LVDS-1] to
[CRTC:3]
[  195.726479] [drm:intel_crtc_cursor_set], cursor off
[  195.726480] [drm:intel_crtc_set_config], [CRTC:4] [NOFB]
[  195.726483] [drm:intel_modeset_stage_output_state], [CONNECTOR:5:LVDS-1] to
[CRTC:3]
[  195.726489] [drm:i915_driver_open],
[  199.707175] [drm:i915_hangcheck_elapsed] *ERROR* stuck on render ring
[  199.707240] [drm] capturing error event; look for more information in
/sys/class/drm/card0/error
[  199.710689] [drm:i915_error_work_func], resetting chip
[  199.710735] [drm] Simulated gpu hang, resetting stop_rings
[  199.710780] [drm:init_status_page], render ring hws offset: 0x00477000
[  199.710960] [drm:init_status_page], bsd ring hws offset: 0x0049a000
[  199.711131] [drm:i915_gem_context_init], Disabling HW Contexts; old hardware
[  199.711135] [drm:gm45_get_vblank_counter], trying to get vblank count for
disabled pipe B
[  199.711195] [drm:i9xx_update_plane], Writing base 00046000 00000000 0 0 5120
[  200.290435] [drm:intel_crtc_cursor_set], cursor off
[  200.290440] [drm:intel_crtc_set_config], [CRTC:3] [FB:37] #connectors=1 (x
y) (0 0)
[  200.290447] [drm:intel_modeset_stage_output_state], [CONNECTOR:5:LVDS-1] to
[CRTC:3]
[  200.290450] [drm:intel_crtc_cursor_set], cursor off
[  200.290451] [drm:intel_crtc_set_config], [CRTC:4] [NOFB]
[  200.290454] [drm:intel_modeset_stage_output_state], [CONNECTOR:5:LVDS-1] to
[CRTC:3]
[  200.300637] [drm:i915_driver_open],
[  200.300646] [drm:intel_crtc_cursor_set], cursor off
[  200.300647] [drm:intel_crtc_set_config], [CRTC:3] [FB:37] #connectors=1 (x
y) (0 0)
[  200.300651] [drm:intel_modeset_stage_output_state], [CONNECTOR:5:LVDS-1] to
[CRTC:3]
[  200.300653] [drm:intel_crtc_cursor_set], cursor off
[  200.300655] [drm:intel_crtc_set_config], [CRTC:4] [NOFB]
[  200.300657] [drm:intel_modeset_stage_output_state], [CONNECTOR:5:LVDS-1] to
[CRTC:3]
[  200.300663] [drm:i915_driver_open],
[  200.300700] [drm:intel_crtc_cursor_set], cursor off
[  200.300702] [drm:intel_crtc_set_config], [CRTC:3] [FB:37] #connectors=1 (x
y) (0 0)
[  200.300705] [drm:intel_modeset_stage_output_state], [CONNECTOR:5:LVDS-1] to
[CRTC:3]
[  200.300708] [drm:intel_crtc_cursor_set], cursor off
[  200.300709] [drm:intel_crtc_set_config], [CRTC:4] [NOFB]
[  200.300711] [drm:intel_modeset_stage_output_state], [CONNECTOR:5:LVDS-1] to
[CRTC:3]
[  200.695181] [drm:i915_error_state_write], Resetting error state

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