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drm/i915: Skip unused fw_domains

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Use find-first-set bitop to quickly scan through the fw_domains mask and
skip iterating over unused domains.

v2: Move the WARN into the caller, to prevent compiler warnings in
normal builds.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170323101944.21627-4-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson
2017-03-23 10:19:41 +00:00
parent cb3600db6e
commit d2dc94bce2
3 changed files with 46 additions and 31 deletions
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3
drivers/gpu/drm/i915/i915_debugfs.c
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@@ -1461,9 +1461,10 @@ static int i915_forcewake_domains(struct seq_file *m, void *data)
{
struct drm_i915_private *dev_priv = node_to_i915(m->private);
struct intel_uncore_forcewake_domain *fw_domain;
unsigned int tmp;
spin_lock_irq(&dev_priv->uncore.lock);
for_each_fw_domain(fw_domain, dev_priv) {
for_each_fw_domain(fw_domain, dev_priv, tmp) {
seq_printf(m, "%s.wake_count = %u\n",
intel_uncore_forcewake_domain_to_str(fw_domain->id),
fw_domain->wake_count);