[PATCH 12/20] drm/i915/dp: Reprobe connector if getting/acking link service IRQs fails

[Imre Deak]

From: Imre Deak <imre.deak at gmail.com>

An AUX access failure during HPD IRQ handling should be handled by
falling back to a full connector detection, ensure that if the failure
happens while reading/acking a link service IRQ.

Signed-off-by: Imre Deak <imre.deak at gmail.com>
---
 drivers/gpu/drm/i915/display/intel_dp.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 7eb208d2c321b..66db426b4aca1 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -5430,12 +5430,15 @@ static bool intel_dp_check_link_service_irq(struct intel_dp *intel_dp)
 		return false;
 
 	if (drm_dp_dpcd_readb(&intel_dp->aux,
-			      DP_LINK_SERVICE_IRQ_VECTOR_ESI0, &val) != 1 || !val)
+			      DP_LINK_SERVICE_IRQ_VECTOR_ESI0, &val) != 1)
+		return true;
+
+	if (!val)
 		return false;
 
 	if (drm_dp_dpcd_writeb(&intel_dp->aux,
 			       DP_LINK_SERVICE_IRQ_VECTOR_ESI0, val) != 1)
-		return false;
+		return true;
 
 	if (val & RX_CAP_CHANGED)
 		reprobe_needed = true;
-- 
2.44.2