On Thu, 05 Feb 2015, Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> wrote: > On Thu, Feb 05, 2015 at 05:45:42PM +0200, Mika Kuoppala wrote: >> We added this WARN_ON to guard against using uninitialized >> forcewake domains. But forgot blissfully that not all >> gens have forcewake domains in the first place. >> >> v2: Move WARN_ON to fw_domains_init (Chris) >> >> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=88911 >> Tested-by: Ding Heng <hengx.ding@xxxxxxxxx> (v1) >> Signed-off-by: Mika Kuoppala <mika.kuoppala@xxxxxxxxx> >> --- >> drivers/gpu/drm/i915/intel_uncore.c | 8 +++++++- >> 1 file changed, 7 insertions(+), 1 deletion(-) >> >> diff --git a/drivers/gpu/drm/i915/intel_uncore.c b/drivers/gpu/drm/i915/intel_uncore.c >> index 76b60a3..e10bcfc 100644 >> --- a/drivers/gpu/drm/i915/intel_uncore.c >> +++ b/drivers/gpu/drm/i915/intel_uncore.c >> @@ -166,7 +166,8 @@ fw_domains_reset(struct drm_i915_private *dev_priv, enum forcewake_domains fw_do >> struct intel_uncore_forcewake_domain *d; >> enum forcewake_domain_id id; >> >> - WARN_ON(dev_priv->uncore.fw_domains == 0); >> + if (dev_priv->uncore.fw_domains == 0) >> + return; >> >> for_each_fw_domain_mask(d, fw_domains, dev_priv, id) >> fw_domain_reset(d); >> @@ -997,6 +998,9 @@ static void intel_uncore_fw_domains_init(struct drm_device *dev) >> { >> struct drm_i915_private *dev_priv = dev->dev_private; >> >> + if (INTEL_INFO(dev_priv->dev)->gen <= 5) >> + return; >> + >> if (IS_GEN9(dev)) { >> dev_priv->uncore.funcs.force_wake_get = fw_domains_get; >> dev_priv->uncore.funcs.force_wake_put = fw_domains_put; >> @@ -1069,6 +1073,8 @@ static void intel_uncore_fw_domains_init(struct drm_device *dev) >> fw_domain_init(dev_priv, FW_DOMAIN_ID_RENDER, >> FORCEWAKE, FORCEWAKE_ACK); >> } >> + > Maybe: /* All future platforms are expected to require complex power gating */ >> + WARN_ON(dev_priv->uncore.fw_domains == 0); >> } > > Reviewed-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> Pushed to drm-intel-next-fixes, thanks for the patch and review. BR, Jani. > -Chris > > -- > Chris Wilson, Intel Open Source Technology Centre > _______________________________________________ > Intel-gfx mailing list > Intel-gfx@xxxxxxxxxxxxxxxxxxxxx > http://lists.freedesktop.org/mailman/listinfo/intel-gfx -- Jani Nikula, Intel Open Source Technology Center _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
