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Message-Id: <1439427380-2436-2-git-send-email-eric@anholt.net>
Date: Wed, 12 Aug 2015 17:56:14 -0700
From: Eric Anholt <eric@...olt.net>
To: dri-devel@...ts.freedesktop.org
Cc: linux-arm-kernel@...ts.infradead.org,
linux-rpi-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
Stephen Warren <swarren@...dotorg.org>,
Lee Jones <lee@...nel.org>, devicetree@...r.kernel.org,
Eric Anholt <eric@...olt.net>
Subject: [PATCH 1/7] drm/vc4: Add devicetree bindings for VC4.
Signed-off-by: Eric Anholt <eric@...olt.net>
---
.../devicetree/bindings/gpu/brcm,bcm-vc4.txt | 83 ++++++++++++++++++++++
1 file changed, 83 insertions(+)
create mode 100644 Documentation/devicetree/bindings/gpu/brcm,bcm-vc4.txt
diff --git a/Documentation/devicetree/bindings/gpu/brcm,bcm-vc4.txt b/Documentation/devicetree/bindings/gpu/brcm,bcm-vc4.txt
new file mode 100644
index 0000000..2b13e61
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpu/brcm,bcm-vc4.txt
@@ -0,0 +1,83 @@
+Broadcom VC4 GPU
+
+The VC4 device present on the Raspberry Pi includes a display system
+with HDMI output and the HVS scaler for compositing display planes.
+
+Required properties for VC4:
+- compatible: Should be "brcm,vc4"
+- crtcs: List of references to pixelvalve scanout engines
+- hvss: List of references to HVS video scalers
+- encoders: List of references to output encoders (HDMI, SDTV)
+
+Required properties for Pixel Valve:
+- compatible: Should be "brcm,vc4-pixelvalve"
+- reg: Physical base address and length of the PV's registers
+- interrupts: The interrupt number
+ See bindings/interrupt-controller/brcm,bcm2835-armctrl-ic.txt
+
+Required properties for HVS:
+- compatible: Should be "brcm,vc4-hvs"
+- reg: Physical base address and length of the HVS's registers
+- interrupts: The interrupt number
+ See bindings/interrupt-controller/brcm,bcm2835-armctrl-ic.txt
+
+Required properties for HDMI
+- compatible: Should be "brcm,vc4-hdmi"
+- reg: Physical base address and length of the two register ranges
+ ("HDMI" and "HD")
+- interrupts: The interrupt numbers
+ See bindings/interrupt-controller/brcm,bcm2835-armctrl-ic.txt
+- ddc: phandle of the I2C controller used for DDC EDID probing
+- crtc: phandle to the pixelvalve CRTC the HDMI encoder is attached to
+
+Optional properties for HDMI:
+- hpd-gpio: The GPIO pin for HDMI hotplug detect (if it doesn't appear
+ as an interrupt/status bit in the HDMI controller
+ itself). See bindings/pinctrl/brcm,bcm2835-gpio.txt
+
+Example:
+/ {
+ soc {
+ pv0: brcm,vc4-pixelvalve@...06000 {
+ compatible = "brcm,vc4-pixelvalve";
+ reg = <0x7e206000 0x100>;
+ interrupts = <2 13>; /* pwa2 */
+ };
+
+ pv1: brcm,vc4-pixelvalve@...07000 {
+ compatible = "brcm,vc4-pixelvalve";
+ reg = <0x7e207000 0x100>;
+ interrupts = <2 14>; /* pwa1 */
+ };
+
+ pv2: brcm,vc4-pixelvalve@...07000 {
+ compatible = "brcm,vc4-pixelvalve";
+ reg = <0x7e807000 0x100>;
+ interrupts = <2 10>; /* pixelvalve */
+ };
+
+ hvs: brcm,hvs@...00000 {
+ compatible = "brcm,vc4-hvs";
+ reg = <0x7e400000 0x6000>;
+ interrupts = <2 1>;
+ };
+
+ hdmi: brcm,vc4-hdmi@...02000 {
+ compatible = "brcm,vc4-hdmi";
+ reg = <0x7e902000 0x600>,
+ <0x7e808000 0x100>;
+ interrupts = <2 8>, <2 9>;
+ ddc = <&i2c2>;
+ hpd-gpio = <&gpio 46 GPIO_ACTIVE_HIGH>;
+ crtc = <&pv2>;
+ };
+
+ vc4: vc4@...e4c0000 {
+ compatible = "brcm,vc4";
+
+ crtcs = <&pv0>, <&pv1>, <&pv2>;
+ encoders = <&hdmi>;
+ hvss = <&hvs>;
+ };
+ };
+};
--
2.1.4
--
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