From 882244a3404088113f1add19d2d029f83e69efeb Mon Sep 17 00:00:00 2001 From: Paulo Zanoni Date: Tue, 1 Apr 2014 14:55:12 -0300 Subject: [PATCH] drm/i915: fix WARNs when reading DDI state while suspended If runtime PM is enabled and we unset all modes, we will runtime suspend after __intel_set_mode() , then function intel_modeset_check_state() will try to read the HW state while it is suspended and trigger lots of WARNs because it shouldn't be reading registers. So on this patch we make intel_ddi_connector_get_hw_state() return false in case the power domain is disabled, and we also make intel_display_power_enabled() return false in case the device is suspended. Notice that we can't just use intel_display_power_enabled_sw() because while the driver is being initialized the power domain refcounts are not reflecting the real state of the hardware. Just for reference, I have previously published an alternate patch for this problem, called "drm/i915: get runtime PM at intel_set_mode". Testcase: igt/pm_pc8 Signed-off-by: Paulo Zanoni Signed-off-by: Daniel Vetter --- Reading git-format-patch failed