[PATCH 3/4] drm/i915: Save sink_count for tracking changes to it

[Sivakumar Thulasimani <sivakumar.thulasimani@intel.com>]

From: "Thulasimani,Sivakumar" <sivakumar.thulasimani@intel.com>

sink count can change between short pulse hpd hence this patch
adds a member variable to intel_dp so we can track any changes
between short pulse interrupts.

Signed-off-by: Sivakumar Thulasimani <sivakumar.thulasimani@intel.com>
---
 drivers/gpu/drm/i915/intel_dp.c  |    5 ++---
 drivers/gpu/drm/i915/intel_drv.h |    1 +
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 9e4e27d..834f513 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -3898,7 +3898,6 @@ intel_dp_get_dpcd(struct intel_dp *intel_dp)
 	struct drm_device *dev = dig_port->base.base.dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	uint8_t rev;
-	uint8_t reg;
 
 	if (intel_dp_dpcd_read_wake(&intel_dp->aux, 0x000, intel_dp->dpcd,
 				    sizeof(intel_dp->dpcd)) < 0)
@@ -3910,10 +3909,10 @@ intel_dp_get_dpcd(struct intel_dp *intel_dp)
 		return false; /* DPCD not present */
 
 	if (intel_dp_dpcd_read_wake(&intel_dp->aux, DP_SINK_COUNT,
-					    &reg, 1) < 0)
+					    &intel_dp->sink_count, 1) < 0)
 			return false;
 
-	if (!DP_GET_SINK_COUNT(reg))
+	if (!DP_GET_SINK_COUNT(intel_dp->sink_count))
 		return false;
 
 	/* Check if the panel supports PSR */
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 81b7d77..8aca5bb 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -712,6 +712,7 @@ struct intel_dp {
 	enum hdmi_force_audio force_audio;
 	bool limited_color_range;
 	bool color_range_auto;
+	uint8_t sink_count;
 	uint8_t dpcd[DP_RECEIVER_CAP_SIZE];
 	uint8_t psr_dpcd[EDP_PSR_RECEIVER_CAP_SIZE];
 	uint8_t downstream_ports[DP_MAX_DOWNSTREAM_PORTS];
-- 
1.7.9.5

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