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| author | Mika Kuoppala <mika.kuoppala@linux.intel.com> | 2015-02-05 17:45:42 +0200 |
|---|---|---|
| committer | Jani Nikula <jani.nikula@intel.com> | 2015-02-09 14:35:49 +0200 |
| commit | 3225b2f95dbb9981be9e2002e49cd8abf0d8d01a (patch) | |
| tree | 6682204cd1cc362820b27da51ad6b285366dd174 /drivers | |
| parent | ebbc7546d2099c94ff2ea940ae5ce740e512a66d (diff) | |
| download | linux-stable-3225b2f95dbb9981be9e2002e49cd8abf0d8d01a.tar.gz linux-stable-3225b2f95dbb9981be9e2002e49cd8abf0d8d01a.tar.bz2 linux-stable-3225b2f95dbb9981be9e2002e49cd8abf0d8d01a.zip | |
drm/i915: Squelch overzealous uncore reset WARN_ON
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@intel.com> (v1)
Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
[Jani: add comment above WARN_ON as suggested by Chris]
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_uncore.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/intel_uncore.c b/drivers/gpu/drm/i915/intel_uncore.c index 76b60a3538b2..c47a3baa53d5 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 +1073,9 @@ static void intel_uncore_fw_domains_init(struct drm_device *dev) fw_domain_init(dev_priv, FW_DOMAIN_ID_RENDER, FORCEWAKE, FORCEWAKE_ACK); } + + /* All future platforms are expected to require complex power gating */ + WARN_ON(dev_priv->uncore.fw_domains == 0); } void intel_uncore_init(struct drm_device *dev) |