[Intel-gfx] [PATCH 4/6] drm/i915: Save sink_count for tracking changes to it

[Shubhangi Shrivastava]

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.

Tested-by: Nathan D Ciobanu <nathan.d.ciobanu at intel.com>
Signed-off-by: Sivakumar Thulasimani <sivakumar.thulasimani at intel.com>
Signed-off-by: Shubhangi Shrivastava <shubhangi.shrivastava at intel.com>
---
 drivers/gpu/drm/i915/intel_dp.c  | 7 +++----
 drivers/gpu/drm/i915/intel_drv.h | 1 +
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 842790e..c2e8516 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -4385,14 +4385,13 @@ intel_dp_detect_dpcd(struct intel_dp *intel_dp)
 	/* If we're HPD-aware, SINK_COUNT changes dynamically */
 	if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11 &&
 	    intel_dp->downstream_ports[0] & DP_DS_PORT_HPD) {
-		uint8_t reg;
 
 		if (intel_dp_dpcd_read_wake(&intel_dp->aux, DP_SINK_COUNT,
-					    &reg, 1) < 0)
+					    &intel_dp->sink_count, 1) < 0)
 			return connector_status_unknown;
 
-		return DP_GET_SINK_COUNT(reg) ? connector_status_connected
-					      : connector_status_disconnected;
+		return DP_GET_SINK_COUNT(intel_dp->sink_count) ?
+		connector_status_connected : connector_status_disconnected;
 	}
 
 	/* If no HPD, poke DDC gently */
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 0438b57..88b05ba 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -757,6 +757,7 @@ struct intel_dp {
 	uint32_t DP;
 	int link_rate;
 	uint8_t lane_count;
+	uint8_t sink_count;
 	bool has_audio;
 	enum hdmi_force_audio force_audio;
 	bool limited_color_range;
-- 
2.6.1