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drm/i915: Do not serialize forcewake acquire across domains 

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