drm/fbdev: rework output polling to be back in the core. (v4)

After thinking it over a lot it made more sense for the core to deal with
the output polling especially so it can notify X.

v2: drop plans for fake connector - per Michel's comments - fix X patch sent to xorg-devel, add intel polled/hpd setting, add initial nouveau polled/hpd settings.

v3: add config lock take inside polling, add intel/nouveau poll init/fini calls

v4: config lock was a bit agressive, only needed around connector list reading.
otherwise it could re-enter.

glisse: discard drm_helper_hpd_irq_event

v3: Reviewed-by: Michel Dänzer <michel@daenzer.net>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index f6299bb788e5..6b1c9a27c27a 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -1392,6 +1392,8 @@ intel_dp_init(struct drm_device *dev, int output_reg)
                            DRM_MODE_CONNECTOR_DisplayPort);
         drm_connector_helper_add(connector, &intel_dp_connector_helper_funcs);
 
+        connector->polled = DRM_CONNECTOR_POLL_HPD;
+
         if (output_reg == DP_A)
                 intel_encoder->type = INTEL_OUTPUT_EDP;
         else