From f1fe12c8bf33241e04c57a0fc5b25b16ba77ba2d Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Thu, 15 Feb 2018 16:12:29 +0100 Subject: ARM: dts: Modernize the Vexpress PL111 integration The Versatile Express was submitted with the actual display bridges unconnected (but defined in the device tree) and mock "panels" encoded in the device tree node of the PL111 controller. This doesn't even remotely describe the actual Versatile Express hardware. Exploit the SiI9022 bridge by connecting the PL111 pads to it, making it use EDID or fallback values to drive the monitor. The also has to use the reserved memory through the CMA pool rather than by open coding a memory region and remapping it explicitly in the driver. To achieve this, a reserved-memory node must exist in the root of the device tree, so we need to pull that out of the motherboard .dtsi include files, and push it into each top-level device tree instead. We do the same manouver for all the Versatile Express boards, taking into account the different location of the video RAM depending on which chip select is used on each platform. This plays nicely with the new PL111 DRM driver and follows the standard ways of assigning bridges and memory pools for graphics. Cc: Sudeep Holla Cc: Lorenzo Pieralisi Cc: Liviu Dudau Cc: Mali DP Maintainers Cc: Robin Murphy Tested-by: Liviu Dudau Signed-off-by: Linus Walleij --- arch/arm/boot/dts/vexpress-v2p-ca15-tc1.dts | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'arch/arm/boot/dts/vexpress-v2p-ca15-tc1.dts') diff --git a/arch/arm/boot/dts/vexpress-v2p-ca15-tc1.dts b/arch/arm/boot/dts/vexpress-v2p-ca15-tc1.dts index 3971427a105b..0dc4277d5f8b 100644 --- a/arch/arm/boot/dts/vexpress-v2p-ca15-tc1.dts +++ b/arch/arm/boot/dts/vexpress-v2p-ca15-tc1.dts @@ -53,6 +53,20 @@ reg = <0 0x80000000 0 0x40000000>; }; + reserved-memory { + #address-cells = <2>; + #size-cells = <2>; + ranges; + + /* Chipselect 2 is physically at 0x18000000 */ + vram: vram@18000000 { + /* 8 MB of designated video RAM */ + compatible = "shared-dma-pool"; + reg = <0 0x18000000 0 0x00800000>; + no-map; + }; + }; + hdlcd@2b000000 { compatible = "arm,hdlcd"; reg = <0 0x2b000000 0 0x1000>; -- cgit v1.2.3-59-g8ed1b