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([2804:1b3:a803:6c49:659c:692c:9416:2f0d]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-3339bbf1feesm46840513eec.26.2026.09.09.13.14.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 09 Sep 2026 13:14:12 -0700 (PDT) From: Fabio Estevam To: neil.armstrong@linaro.org Cc: jesszhan0024@gmail.com, dri-devel@lists.freedesktop.org, Fabio Estevam , stable@vger.kernel.org Subject: [PATCH] drm/panel: simple: Add Raystar RFF500F-AWH-DNN enable delay Date: Wed, 9 Sep 2026 17:13:46 -0300 Message-ID: <20260909201346.937343-1-festevam@gmail.com> X-Mailer: git-send-email 2.43.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: Fabio Estevam The RFF500F-AWH-DNN datasheet requires a minimum delay of 250 ms between display signal output and backlight power-on. Without this delay, the backlight can expose unsettled panel contents during display startup, resulting in a brief bright flash. Set the panel enable delay to the datasheet-specified minimum. Cc: stable@vger.kernel.org Fixes: 1b2a9ec82099 ("drm/panel: simple: Add Raystar RFF500F-AWH-DNN panel entry") Signed-off-by: Fabio Estevam --- drivers/gpu/drm/panel/panel-simple.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c index c95964ba25a9..70e37ff12c9e 100644 --- a/drivers/gpu/drm/panel/panel-simple.c +++ b/drivers/gpu/drm/panel/panel-simple.c @@ -4354,6 +4354,9 @@ static const struct panel_desc raystar_rff500f_awh_dnn = { .width = 108, .height = 65, }, + .delay = { + .enable = 250, + }, .bus_format = MEDIA_BUS_FMT_RGB888_1X7X4_SPWG, .connector_type = DRM_MODE_CONNECTOR_LVDS, }; -- 2.43.0