From 2ed53a94d8cb14f8f1c56ecdd1e6def5bbe41628 Mon Sep 17 00:00:00 2001 From: Chris Wilson <chris@chris-wilson.co.uk> Date: Thu, 7 Apr 2016 07:29:11 +0100 Subject: [PATCH] drm/i915: On GPU reset, set the HWS breadcrumb to the last seqno After the GPU reset and we discard all of the incomplete requests, mark the GPU as having advanced to the last_submitted_seqno (as having completed the requests and ready for fresh work). The impact of this is negligible, as all the requests will be considered completed by this point, it just brings the HWS into line with expectations for external viewers. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com> Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1460010558-10705-2-git-send-email-chris@chris-wilson.co.uk --- drivers/gpu/drm/i915/i915_gem.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 40f90c7e718a5..3e9e6f9b66f53 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -2882,6 +2882,8 @@ static void i915_gem_reset_engine_cleanup(struct drm_i915_private *dev_priv, buffer->last_retired_head = buffer->tail; intel_ring_update_space(buffer); } + + intel_ring_init_seqno(engine, engine->last_submitted_seqno); } void i915_gem_reset(struct drm_device *dev) -- 2.30.2