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From: Sean Anderson <sean.anderson@linux.dev>
To: Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
	Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>,
	Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
	Maxime Ripard <mripard@kernel.org>,
	Thomas Zimmermann <tzimmermann@suse.de>,
	dri-devel@lists.freedesktop.org
Cc: linux-kernel@vger.kernel.org, David Airlie <airlied@gmail.com>,
	Hyun Kwon <hyun.kwon@xilinx.com>, Simona Vetter <simona@ffwll.ch>,
	Michal Simek <michal.simek@amd.com>,
	linux-arm-kernel@lists.infradead.org,
	Sean Anderson <sean.anderson@linux.dev>
Subject: [PATCH 1/3] drm: zynqmp_dp: Update connector state before AUX transfers
Date: Fri, 24 Oct 2025 15:17:05 -0400	[thread overview]
Message-ID: <20251024191707.2310589-2-sean.anderson@linux.dev> (raw)
In-Reply-To: <20251024191707.2310589-1-sean.anderson@linux.dev>

We still want to retry AUX transfers even when the connector is first
plugged in. Update the connector state before reading the DPDC to ensure
the AUX bus sees the most-recent state.

Fixes: d76271d22694 ("drm: xlnx: DRM/KMS driver for Xilinx ZynqMP DisplayPort Subsystem")
Signed-off-by: Sean Anderson <sean.anderson@linux.dev>
---

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

diff --git a/drivers/gpu/drm/xlnx/zynqmp_dp.c b/drivers/gpu/drm/xlnx/zynqmp_dp.c
index 34ddbf98e81d..f39c78b08e6a 100644
--- a/drivers/gpu/drm/xlnx/zynqmp_dp.c
+++ b/drivers/gpu/drm/xlnx/zynqmp_dp.c
@@ -1697,6 +1697,7 @@ static enum drm_connector_status __zynqmp_dp_bridge_detect(struct zynqmp_dp *dp)
 	}
 
 	if (state & ZYNQMP_DP_INTERRUPT_SIGNAL_STATE_HPD) {
+		dp->status = connector_status_connected;
 		ret = drm_dp_dpcd_read(&dp->aux, 0x0, dp->dpcd,
 				       sizeof(dp->dpcd));
 		if (ret < 0) {
@@ -1711,7 +1712,6 @@ static enum drm_connector_status __zynqmp_dp_bridge_detect(struct zynqmp_dp *dp)
 					       drm_dp_max_lane_count(dp->dpcd),
 					       dp->num_lanes);
 
-		dp->status = connector_status_connected;
 		return connector_status_connected;
 	}
 
-- 
2.35.1.1320.gc452695387.dirty


  reply	other threads:[~2025-10-24 19:22 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-10-24 19:17 [PATCH 0/3] drm: zynqmp_dp: Retrain link after HPD if necessary Sean Anderson
2025-10-24 19:17 ` Sean Anderson [this message]
2025-10-24 19:17 ` [PATCH 2/3] drm: zynqmp_dp: Use smp_load/store for status Sean Anderson
2025-10-24 19:17 ` [PATCH 3/3] drm: zynqmp_dp: Retrain link after HPD if necessary Sean Anderson

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