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)
Cc: Doug Anderson <diand...@chromium.org>
Cc: Eric Anholt <e...@anholt.net>
Cc: Heiko Stuebner <he...@sntech.de>
Cc: Jeffy Chen <jeffy.c...@rock-chips.com>
Cc: Rob Herring <robh...@kernel.org>
Cc: Stéphane Marchesin <marc...@chromium.org>
Cc: Thierry Reding <thierry.red...@gmail.com>
Cc: devicet...@vger.kernel.org
Cc: dri-devel@lists.freedesktop.org
Cc: linux-rockc...@lists.infradead.org
Signed-off-by: Sean Paul <seanp...@chromium.org>
---
.../bindings/display/panel/simple-panel.txt | 30 ++++++++++++++++++++++
1 file changed, 30 insertions(+)
diff --git a/Documentation/devicetree/bindings/display/panel/simple-panel.txt
b/Documentation/devicetree/bindings/display/panel/simple-panel.txt
index 45a457ad38f0..7788b9ce160b 100644
--- a/Documentation/devicetree/bindings/display/panel/simple-panel.txt
+++ b/Documentation/devicetree/bindings/display/panel/simple-panel.txt
@@ -12,6 +12,24 @@ Optional properties:
- enable-gpios: GPIO pin to enable or disable the panel
- backlight: phandle of the backlight device attached to the panel
+panel-timing subnode
+--------------------
+
+This optional subnode is for devices which require a mode differing from the
+panel's "typical" display timing as programmed in the simple-panel driver.
+Overriding the driver mode must only be done in the following scenario:
+ - The restrictions motivating the override cannot be applied to the platform's
+ display driver (ie: it must be specific to the device not the platform)
+ - The panel must not have a fixed mode attributed to it in the driver
+ - The panel must provide at list one display_timing range by which the
override
+ mode can be validated against
+ - The override mode will use the 'typ' values from the panel-timings subnode
+ - You must provide all required properties for the panel-timing subnode
+
+Format information on the panel-timing subnode can be found in
+display-timing.txt.
+
+
Example:
panel: panel {
@@ -22,4 +40,16 @@ 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>;
+ };
};
--
2.16.0.rc1.238.g530d649a79-goog
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