Upon resume, like after a cold boot, we need to forcibly probe the analog connector and cannot rely on the hotplug status.
Based on a patch by Takashi Iwai. Reported-by: Stefan Dirsch <sndirsch at suse.de> Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=26952 Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk> --- drivers/gpu/drm/i915/intel_crt.c | 10 ++++++++++ 1 files changed, 10 insertions(+), 0 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_crt.c b/drivers/gpu/drm/i915/intel_crt.c index 17035b8..8a77ff4 100644 --- a/drivers/gpu/drm/i915/intel_crt.c +++ b/drivers/gpu/drm/i915/intel_crt.c @@ -535,6 +535,15 @@ static int intel_crt_set_property(struct drm_connector *connector, return 0; } +static void intel_crt_reset(struct drm_connector *connector) +{ + struct drm_device *dev = connector->dev; + struct intel_crt *crt = intel_attached_crt(connector); + + if (HAS_PCH_SPLIT(dev)) + crt->force_hotplug_required = 1; +} + /* * Routines for controlling stuff on the analog port */ @@ -548,6 +557,7 @@ static const struct drm_encoder_helper_funcs intel_crt_helper_funcs = { }; static const struct drm_connector_funcs intel_crt_connector_funcs = { + .reset = intel_crt_reset, .dpms = drm_helper_connector_dpms, .detect = intel_crt_detect, .fill_modes = drm_helper_probe_single_connector_modes, -- 1.7.2.3
