[Intel-gfx] [PATCH] drm/i915: Really ignore long HPD pulses on eDP

[ville.syrjala at linux.intel.com]

From: Ville Syrjälä <ville.syrjala at linux.intel.com>

Return IRQ_HANDLED from intel_dp_hpd_pulse() to properly
ignore the long HPD pulse on eDP to avoid the never ending
VDD off->HPD->VDD on->VDD off->HPD... cycle.

This fixes a regression intoduced by
 commit b2c5c181ed18490648a02f8c7d562a3b9e8b96de
 Author: Daniel Vetter <daniel.vetter at ffwll.ch>
 Date:   Fri Jan 23 06:00:31 2015 +0100

    drm/i915: Use symbolic irqreturn for ->hpd_pulse

Cc: Daniel Vetter <daniel.vetter at ffwll.ch>
Cc: Jani Nikula <jani.nikula at linux.intel.com>
Reviewed-by: Daniel Vetter <daniel.vetter at ffwll.ch>
Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
Jani, I decided against the goto out solution because it would have looked like
 ret = IRQ_HANDLED;
 goto out;
which seemed a bit silly.

 drivers/gpu/drm/i915/intel_dp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 33b1b82..cc711ac 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -4499,7 +4499,7 @@ intel_dp_hpd_pulse(struct intel_digital_port *intel_dig_port, bool long_hpd)
 		 */
 		DRM_DEBUG_KMS("ignoring long hpd on eDP port %c\n",
 			      port_name(intel_dig_port->port));
-		return false;
+		return IRQ_HANDLED;
 	}
 
 	DRM_DEBUG_KMS("got hpd irq on port %c - %s\n",
-- 
2.0.5