linux-kernel - [PATCH v4 1/7] dt-bindings: Add panel-timing subnode to simple-panel

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Date:   Thu, 28 Mar 2019 10:17:04 -0700
From:   Douglas Anderson <dianders@...omium.org>
To:     Thierry Reding <thierry.reding@...il.com>,
        Heiko Stuebner <heiko@...ech.de>,
        Sean Paul <seanpaul@...omium.org>
Cc:     linux-rockchip@...ts.infradead.org,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        dri-devel@...ts.freedesktop.org,
        Boris Brezillon <boris.brezillon@...labora.com>,
        Ezequiel Garcia <ezequiel@...labora.com>,
        Enric Balletbò <enric.balletbo@...labora.com>,
        Rob Herring <robh+dt@...nel.org>, mka@...omium.org,
        Doug Anderson <dianders@...omium.org>,
        Eric Anholt <eric@...olt.net>,
        Jeffy Chen <jeffy.chen@...k-chips.com>,
        Stéphane Marchesin <marcheu@...omium.org>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        David Airlie <airlied@...ux.ie>,
        Mark Rutland <mark.rutland@....com>,
        Daniel Vetter <daniel@...ll.ch>
Subject: [PATCH v4 1/7] dt-bindings: Add panel-timing subnode to simple-panel

From: Sean Paul <seanpaul@...omium.org>

This patch adds a new subnode to simple-panel allowing us to override
the typical timing expressed in the panel's display_timing.

Changes in v2:
 - Split out the binding into a new patch (Rob)
 - display-timings is a new section (Rob)
 - Use the full display-timings subnode instead of picking the timing
   out (Rob/Thierry)
Changes in v3:
 - Go back to using the timing subnode directly, but rename to
   panel-timing (Rob)
Changes in v4:
 - Simplify desc. for when override should be used (Thierry/Laurent)
 - Removed Rob H review since it's been a year and wording changed

Cc: Doug Anderson <dianders@...omium.org>
Cc: Eric Anholt <eric@...olt.net>
Cc: Heiko Stuebner <heiko@...ech.de>
Cc: Jeffy Chen <jeffy.chen@...k-chips.com>
Cc: Rob Herring <robh+dt@...nel.org>
Cc: Stéphane Marchesin <marcheu@...omium.org>
Cc: Thierry Reding <thierry.reding@...il.com>
Cc: devicetree@...r.kernel.org
Cc: dri-devel@...ts.freedesktop.org
Cc: linux-rockchip@...ts.infradead.org
Signed-off-by: Sean Paul <seanpaul@...omium.org>
Signed-off-by: Douglas Anderson <dianders@...omium.org>
---

 .../bindings/display/panel/simple-panel.txt   | 24 +++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/Documentation/devicetree/bindings/display/panel/simple-panel.txt b/Documentation/devicetree/bindings/display/panel/simple-panel.txt
index b2b872c710f2..6157f86ddce4 100644
--- a/Documentation/devicetree/bindings/display/panel/simple-panel.txt
+++ b/Documentation/devicetree/bindings/display/panel/simple-panel.txt
@@ -15,6 +15,18 @@ Optional properties:
   (hot plug detect) signal, but the signal isn't hooked up so we should
   hardcode the max delay from the panel spec when powering up the panel.
 
+panel-timing subnode
+--------------------
+
+This optional subnode is for devices which require a mode differing
+from the panel's "typical" display timing.  The panel timings provided
+here will be ignored if they are found to be outside of allowable
+ranges for the given panel.
+
+Format information on the panel-timing subnode can be found in
+display-timing.txt.
+
+
 Example:
 
 	panel: panel {
@@ -25,4 +37,16 @@ Example:
 		enable-gpios = <&gpio 90 0>;
 
 		backlight = <&backlight>;
+
+		panel-timing {
+			clock-frequency = <266604720>;
+			hactive = <2400>;
+			hfront-porch = <48>;
+			hback-porch = <84>;
+			hsync-len = <32>;
+			vactive = <1600>;
+			vfront-porch = <3>;
+			vback-porch = <120>;
+			vsync-len = <10>;
+		};
 	};
-- 
2.21.0.392.gf8f6787159e-goog