From: Vladimir Zapolskiy <vz@kernel.org>
To: Neil Armstrong <neil.armstrong@linaro.org>,
Jessica Zhang <jesszhan0024@gmail.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
Maxime Ripard <mripard@kernel.org>,
Thomas Zimmermann <tzimmermann@suse.de>,
David Airlie <airlied@gmail.com>, Simona Vetter <simona@ffwll.ch>,
dri-devel@lists.freedesktop.org
Subject: [PATCH 0/2] drm/panel: visionox-r66451: Fix brightness and power on
Date: Sun, 1 Nov 2026 23:24:56 +0200 [thread overview]
Message-ID: <20261101212458.2431191-1-vz@kernel.org> (raw)
Two fixes for the Visionox R66451 panel driver, found while enabling the
panel on the Qualcomm SM8350-HDK display card.
The first change sends the DCS brightness value MSB first, as the panel
expects. Without it, the brightness does not follow the requested value,
and the default brightness is received as a different value.
The second change waits longer after the panel reset. With the current
10ms delay, the panel misses the initialization commands, does not exit
sleep mode, and the display stays black.
Vladimir Zapolskiy (2):
drm/panel: visionox-r66451: Send the brightness value MSB first
drm/panel: visionox-r66451: Wait longer after the panel reset
drivers/gpu/drm/panel/panel-visionox-r66451.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--
2.51.0
next reply other threads:[~2026-11-01 21:25 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-01 21:24 Vladimir Zapolskiy [this message]
2026-11-01 21:24 ` [PATCH 1/2] drm/panel: visionox-r66451: Send the brightness value MSB first Vladimir Zapolskiy
2026-11-02 13:03 ` Neil Armstrong
2026-11-01 21:24 ` [PATCH 2/2] drm/panel: visionox-r66451: Wait longer after the panel reset Vladimir Zapolskiy
2026-11-02 13:03 ` Neil Armstrong
2026-11-02 13:47 ` [PATCH 0/2] drm/panel: visionox-r66451: Fix brightness and power on Neil Armstrong
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