[Intel-gfx] [PATCH v3 3/3] drm/i915: Do not start connector polling on headless sku

[Jouni Högander]

Connector polling is waking up the polled device. Polling
is unnecessary if our device is known to not have display.

Fix this and save some power by disabling starting connector
polling when we are having headless sku. Use information from
opregion.

v2: Move headless sku check into INTEL_DISPLAY_ENABLED macro

Signed-off-by: Jouni Högander <jouni.hogander at intel.com>
Reviewed-by: Jani Nikula <jani.nikula at intel.com>
---
 drivers/gpu/drm/i915/i915_drv.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 9805c6e6d4da..a5bc6a774c5a 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1342,7 +1342,9 @@ IS_SUBPLATFORM(const struct drm_i915_private *i915,
 
 /* Only valid when HAS_DISPLAY() is true */
 #define INTEL_DISPLAY_ENABLED(dev_priv) \
-	(drm_WARN_ON(&(dev_priv)->drm, !HAS_DISPLAY(dev_priv)), !(dev_priv)->params.disable_display)
+	(drm_WARN_ON(&(dev_priv)->drm, !HAS_DISPLAY(dev_priv)),		\
+	 !(dev_priv)->params.disable_display &&				\
+	 !intel_opregion_headless_sku(dev_priv))
 
 #define HAS_GUC_DEPRIVILEGE(dev_priv) \
 	(INTEL_INFO(dev_priv)->has_guc_deprivilege)
-- 
2.25.1