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From:   Philippe Cornu <philippe.cornu@st.com>
To:     Rob Herring <robh+dt@kernel.org>, Arnd Bergmann <arnd@arndb.de>,
        "Russell King" <linux@armlinux.org.uk>,
        Mark Rutland <mark.rutland@arm.com>,
        "Yannick Fertre" <yannick.fertre@st.com>,
        Philippe Cornu <philippe.cornu@st.com>,
        Benjamin Gaignard <benjamin.gaignard@linaro.org>,
        Vincent Abriou <vincent.abriou@st.com>,
        David Airlie <airlied@linux.ie>, <devicetree@vger.kernel.org>,
        <linux-arm-kernel@lists.infradead.org>,
        <dri-devel@lists.freedesktop.org>, <linux-kernel@vger.kernel.org>
CC:     Fabien Dessenne <fabien.dessenne@st.com>,
        Mickael Reulier <mickael.reulier@st.com>,
        Gabriel Fernandez <gabriel.fernandez@st.com>,
        Ludovic Barre <ludovic.barre@st.com>,
        Alexandre Torgue <alexandre.torgue@st.com>,
        Maxime Coquelin <mcoquelin.stm32@gmail.com>
Subject: [PATCH v1 1/2] dt-bindings: display: stm32: add a 2nd endpoint
Date:   Thu, 26 Oct 2017 13:48:08 +0200
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ltdc can have up to 2 endpoints:
 - dpi external gpios: for rgb panels or external bridge ICs.
 - dpi internal ios: connected internally to dsi.

Note: Refer to the reference manual to know if the dsi is
present on your device.

Signed-off-by: Philippe Cornu <philippe.cornu@st.com>
---
 Documentation/devicetree/bindings/display/st,stm32-ltdc.txt | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/display/st,stm32-ltdc.txt b/Documentation/devicetree/bindings/display/st,stm32-ltdc.txt
index 74b5ac7..0292522 100644
--- a/Documentation/devicetree/bindings/display/st,stm32-ltdc.txt
+++ b/Documentation/devicetree/bindings/display/st,stm32-ltdc.txt
@@ -10,7 +10,11 @@
       - "lcd" for the clock feeding the output pixel clock & IP clock.
   - resets: reset to be used by the device (defined by use of RCC macro).
   Required nodes:
-    - Video port for RGB output.
+  - Video port for DPI RGB output: ltdc has one video port with up to 2
+    endpoints:
+      - for external dpi rgb panel or bridge, using gpios.
+      - for internal dpi input of the MIPI DSI host controller.
+      Note: These 2 endpoints cannot be activated simultaneously.
 
 * STMicroelectronics STM32 DSI controller specific extensions to Synopsys
   DesignWare MIPI DSI host controller
-- 
1.9.1


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