linux-kernel - [PATCH v3 1/3] drm/panel: visionox-rm69299: Fix clock frequency for SHIFT6mq

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Message-Id: <20250910-shift6mq-panel-v3-1-a7729911afb9@sigxcpu.org>
Date: Wed, 10 Sep 2025 18:39:56 +0200
From: Guido Günther <agx@...xcpu.org>
To: Neil Armstrong <neil.armstrong@...aro.org>, 
 Jessica Zhang <jessica.zhang@....qualcomm.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>, 
 Matthias Kaehlcke <mka@...omium.org>, Sam Ravnborg <sam@...nborg.org>
Cc: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org, 
 phone-devel@...r.kernel.org, 
 Guido Günther <agx@...xcpu.org>
Subject: [PATCH v3 1/3] drm/panel: visionox-rm69299: Fix clock frequency
 for SHIFT6mq

Make the clock frequency match what the sdm845 downstream kernel
uses. Otherwise the panel stays black.

Fixes: 783334f366b18 ("drm/panel: visionox-rm69299: support the variant found in the SHIFT6mq")
Signed-off-by: Guido Günther <agx@...xcpu.org>
Reviewed-by: Neil Armstrong <neil.armstrong@...aro.org>
---
 drivers/gpu/drm/panel/panel-visionox-rm69299.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/panel/panel-visionox-rm69299.c b/drivers/gpu/drm/panel/panel-visionox-rm69299.c
index 909c280eab1fb408a713d84051a1afbb252c45e8..5491d601681cff52eca1d72ad4489731d2276c30 100644
--- a/drivers/gpu/drm/panel/panel-visionox-rm69299.c
+++ b/drivers/gpu/drm/panel/panel-visionox-rm69299.c
@@ -247,7 +247,7 @@ static const struct drm_display_mode visionox_rm69299_1080x2248_60hz = {
 };
 
 static const struct drm_display_mode visionox_rm69299_1080x2160_60hz = {
-	.clock = 158695,
+	.clock = (2160 + 8 + 4 + 4) * (1080 + 26 + 2 + 36) * 60 / 1000,
 	.hdisplay = 1080,
 	.hsync_start = 1080 + 26,
 	.hsync_end = 1080 + 26 + 2,

-- 
2.51.0