linux-kernel - [PATCH v2] drm: xlnx: zynqmp_dpsub: fix hotplug detection

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Message-ID: <20241028134218.54727-1-lists@steffen.cc>
Date: Mon, 28 Oct 2024 14:42:17 +0100
From: Steffen Dirkwinkel <lists@...ffen.cc>
To: dri-devel@...ts.freedesktop.org,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
Cc: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
	stable@...r.kernel.org,
	Steffen Dirkwinkel <s.dirkwinkel@...khoff.com>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	David Airlie <airlied@...il.com>,
	Simona Vetter <simona@...ll.ch>,
	Michal Simek <michal.simek@....com>,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v2] drm: xlnx: zynqmp_dpsub: fix hotplug detection

From: Steffen Dirkwinkel <s.dirkwinkel@...khoff.com>

drm_kms_helper_poll_init needs to be called after zynqmp_dpsub_kms_init.
zynqmp_dpsub_kms_init creates the connector and without it we don't
enable hotplug detection.

Fixes: eb2d64bfcc17 ("drm: xlnx: zynqmp_dpsub: Report HPD through the bridge")
Cc: stable@...r.kernel.org
Signed-off-by: Steffen Dirkwinkel <s.dirkwinkel@...khoff.com>
---
 drivers/gpu/drm/xlnx/zynqmp_kms.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/xlnx/zynqmp_kms.c b/drivers/gpu/drm/xlnx/zynqmp_kms.c
index bd1368df7870..311397cee5ca 100644
--- a/drivers/gpu/drm/xlnx/zynqmp_kms.c
+++ b/drivers/gpu/drm/xlnx/zynqmp_kms.c
@@ -509,12 +509,12 @@ int zynqmp_dpsub_drm_init(struct zynqmp_dpsub *dpsub)
 	if (ret)
 		return ret;
 
-	drm_kms_helper_poll_init(drm);
-
 	ret = zynqmp_dpsub_kms_init(dpsub);
 	if (ret < 0)
 		goto err_poll_fini;
 
+	drm_kms_helper_poll_init(drm);
+
 	/* Reset all components and register the DRM device. */
 	drm_mode_config_reset(drm);
 
-- 
2.47.0