linux-kernel - [PATCH] drm/bridge: lt9611uxc: Increase EDID wait time from 500ms to 1000ms

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Message-Id: <20251121-hdmibridge-v1-1-14c63890f362@oss.qualcomm.com>
Date: Fri, 21 Nov 2025 19:12:06 +0530
From: Gopi Botlagunta <venkata.botlagunta@....qualcomm.com>
To: Andrzej Hajda <andrzej.hajda@...el.com>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Robert Foss <rfoss@...nel.org>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Jonas Karlman <jonas@...boo.se>,
        Jernej Skrabec <jernej.skrabec@...il.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>
Cc: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        venkata.valluru@....qualcomm.com, jessica.zhang@....qualcomm.com,
        Gopi Botlagunta <venkata.botlagunta@....qualcomm.com>
Subject: [PATCH] drm/bridge: lt9611uxc: Increase EDID wait time from 500ms
 to 1000ms

EDID interrupt was coming 600-650 ms after HPD interrupt, resulting
into EDID read timeout and default resolution of 1024x768 on display.

Signed-off-by: Gopi Botlagunta <venkata.botlagunta@....qualcomm.com>
---
 drivers/gpu/drm/bridge/lontium-lt9611uxc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/bridge/lontium-lt9611uxc.c b/drivers/gpu/drm/bridge/lontium-lt9611uxc.c
index 38fb8776c0f4..6f2b72fba598 100644
--- a/drivers/gpu/drm/bridge/lontium-lt9611uxc.c
+++ b/drivers/gpu/drm/bridge/lontium-lt9611uxc.c
@@ -382,7 +382,7 @@ lt9611uxc_bridge_detect(struct drm_bridge *bridge, struct drm_connector *connect
 static int lt9611uxc_wait_for_edid(struct lt9611uxc *lt9611uxc)
 {
 	return wait_event_interruptible_timeout(lt9611uxc->wq, lt9611uxc->edid_read,
-			msecs_to_jiffies(500));
+			msecs_to_jiffies(1000));
 }
 
 static int lt9611uxc_get_edid_block(void *data, u8 *buf, unsigned int block, size_t len)

---
base-commit: 3c3d81183061b9e49dd3207fbbbc36314744bf3f
change-id: 20251121-hdmibridge-e012bfeed3c3

Best regards,
-- 
Gopi Botlagunta <venkata.botlagunta@....qualcomm.com>