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drm/i915: Do not serialize forcewake acquire across domains

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On platforms with multiple forcewake domains it seems more efficient
to request all desired ones and then to wait for acks to avoid
needlessly serializing on each domain.

v2: Rebase.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/1460045074-1006-1-git-send-email-tvrtko.ursulin@linux.intel.com
This commit is contained in:
Tvrtko Ursulin
2016-04-07 17:04:34 +01:00
parent 33c582c10a
commit 4e1176dd61
1 changed files with 3 additions and 1 deletions
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4
drivers/gpu/drm/i915/intel_uncore.c
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@@ -115,8 +115,10 @@ fw_domains_get(struct drm_i915_private *dev_priv, enum forcewake_domains fw_doma
for_each_fw_domain_masked(d, fw_domains, dev_priv) {
fw_domain_wait_ack_clear(d);
fw_domain_get(d);
fw_domain_wait_ack(d);
}
for_each_fw_domain_masked(d, fw_domains, dev_priv)
fw_domain_wait_ack(d);
}
static void