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From: Artur Weber <aweber.kernel@gmail.com>
Date: Mon, 01 Jan 2024 22:00:15 +0100
Subject: [PATCH 1/2] ARM: dts: exynos4212-tab3: add samsung,invert-vclk
 flag to fimd
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Message-Id: <20240101-tab3-display-fixes-v1-1-887ba4dbd16b@gmail.com>
References: <20240101-tab3-display-fixes-v1-0-887ba4dbd16b@gmail.com>
In-Reply-To: <20240101-tab3-display-fixes-v1-0-887ba4dbd16b@gmail.com>
To: Rob Herring <robh+dt@kernel.org>, 
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>, 
 Conor Dooley <conor+dt@kernel.org>, Alim Akhtar <alim.akhtar@samsung.com>, 
 Neil Armstrong <neil.armstrong@linaro.org>, 
 Jessica Zhang <quic_jesszhan@quicinc.com>, Sam Ravnborg <sam@ravnborg.org>, 
 Maarten Lankhorst <maarten.lankhorst@linux.intel.com>, 
 Maxime Ripard <mripard@kernel.org>, Thomas Zimmermann <tzimmermann@suse.de>, 
 David Airlie <airlied@gmail.com>, Daniel Vetter <daniel@ffwll.ch>
Cc: devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, 
 linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org, 
 dri-devel@lists.freedesktop.org, Artur Weber <aweber.kernel@gmail.com>

After more investigation, I've found that it's not the panel driver
config that needs to be modified to invert the data polarity, but
the FIMD config.

Add the missing invert-vclk option that is required to get the display
to work correctly.

Signed-off-by: Artur Weber <aweber.kernel@gmail.com>
---
 arch/arm/boot/dts/samsung/exynos4212-tab3.dtsi | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/boot/dts/samsung/exynos4212-tab3.dtsi b/arch/arm/boot/dts/samsung/exynos4212-tab3.dtsi
index d7954ff466b4..e5254e32aa8f 100644
--- a/arch/arm/boot/dts/samsung/exynos4212-tab3.dtsi
+++ b/arch/arm/boot/dts/samsung/exynos4212-tab3.dtsi
@@ -434,6 +434,7 @@ &exynos_usbphy {
 };
 
 &fimd {
+	samsung,invert-vclk;
 	status = "okay";
 };
 

-- 
2.43.0