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drm/i915: take a power domain reference while checking the HDMI live status

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There are platforms that don't need the full GMBUS power domain (BXT)
while others do (PCH, VLV/CHV). For optimizing this we would need to add
a new power domain, but it's not clear how much we would benefit given
the short time we hold the reference. So for now let's keep things
simple.

v2:
- fix commit message, PCH won't take any redundant power resource after
this change (Ville)

Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
[fix commit message in v2 (Imre)]
Link: http://patchwork.freedesktop.org/patch/msgid/1447959301-1263-2-git-send-email-imre.deak@intel.com
This commit is contained in:
Imre Deak 2015-11-19 20:55:01 +02:00
parent 69172f210e
commit 29bb94bb4d
1 changed files with 4 additions and 0 deletions
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4
drivers/gpu/drm/i915/intel_hdmi.c
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@ -1393,6 +1393,8 @@ intel_hdmi_detect(struct drm_connector *connector, bool force)
DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
connector->base.id, connector->name);
intel_display_power_get(dev_priv, POWER_DOMAIN_GMBUS);
while (!live_status && --retry) {
live_status = intel_digital_port_connected(dev_priv,
hdmi_to_dig_port(intel_hdmi));
@ -1412,6 +1414,8 @@ intel_hdmi_detect(struct drm_connector *connector, bool force)
} else
status = connector_status_disconnected;
intel_display_power_put(dev_priv, POWER_DOMAIN_GMBUS);
return status;
}