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)
Cc: Doug Anderson <dianders@xxxxxxxxxxxx>
Cc: Eric Anholt <eric@xxxxxxxxxx>
Cc: Heiko Stuebner <heiko@xxxxxxxxx>
Cc: Jeffy Chen <jeffy.chen@xxxxxxxxxxxxxx>
Cc: Rob Herring <robh+dt@xxxxxxxxxx>
Cc: Stéphane Marchesin <marcheu@xxxxxxxxxxxx>
Cc: Thierry Reding <thierry.reding@xxxxxxxxx>
Cc: devicetree@xxxxxxxxxxxxxxx
Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
Cc: linux-rockchip@xxxxxxxxxxxxxxxxxxx
Signed-off-by: Sean Paul <seanpaul@xxxxxxxxxxxx>
---
.../bindings/display/panel/simple-panel.txt | 32 ++++++++++++++++++++++
1 file changed, 32 insertions(+)
diff --git a/Documentation/devicetree/bindings/display/panel/simple-panel.txt b/Documentation/devicetree/bindings/display/panel/simple-panel.txt
index 45a457ad38f0..9717b9b79d98 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
+display-timings 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 display-timings subnode
+ - You must provide all required properties for the display-timings subnode
+
+Format information on the display-timings subnode can be found in
+display-timing.txt.
+
+
Example:
panel: panel {
@@ -22,4 +40,18 @@ Example:
enable-gpios = <&gpio 90 0>;
backlight = <&backlight>;
+
+ display-timings {
+ timing0: override {
+ 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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