drm/i915: check the power domains in intel_lvds_get_hw_state()
Just like we do for the other encoders. This should fix some WARNs
when running pm_rpm on SNB.
Testcase: igt/pm_rpm
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=80463
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/intel_lvds.c b/drivers/gpu/drm/i915/intel_lvds.c
index 2312602..cba04dd 100644
--- a/drivers/gpu/drm/i915/intel_lvds.c
+++ b/drivers/gpu/drm/i915/intel_lvds.c
@@ -71,8 +71,13 @@
struct drm_device *dev = encoder->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(&encoder->base);
+ enum intel_display_power_domain power_domain;
u32 tmp;
+ power_domain = intel_display_port_power_domain(encoder);
+ if (!intel_display_power_enabled(dev_priv, power_domain))
+ return false;
+
tmp = I915_READ(lvds_encoder->reg);
if (!(tmp & LVDS_PORT_EN))