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authorLinus Walleij <linus.walleij@linaro.org>2018-02-15 16:12:29 +0100
committerLinus Walleij <linus.walleij@linaro.org>2018-11-29 08:31:41 +0100
commitf1fe12c8bf33241e04c57a0fc5b25b16ba77ba2d (patch)
tree629d48764179b098e567416dd779926adae17a3d /arch/arm/boot/dts/vexpress-v2p-ca9.dts
parentLinux 4.20-rc1 (diff)
downloadlinux-f1fe12c8bf33241e04c57a0fc5b25b16ba77ba2d.tar.xz
linux-f1fe12c8bf33241e04c57a0fc5b25b16ba77ba2d.zip
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 <sudeep.holla@arm.com> Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: Liviu Dudau <liviu.dudau@arm.com> Cc: Mali DP Maintainers <malidp@foss.arm.com> Cc: Robin Murphy <robin.murphy@arm.com> Tested-by: Liviu Dudau <liviu.dudau@arm.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'arch/arm/boot/dts/vexpress-v2p-ca9.dts')
-rw-r--r--arch/arm/boot/dts/vexpress-v2p-ca9.dts43
1 files changed, 18 insertions, 25 deletions
diff --git a/arch/arm/boot/dts/vexpress-v2p-ca9.dts b/arch/arm/boot/dts/vexpress-v2p-ca9.dts
index fc43873cbdff..d796efaadbe3 100644
--- a/arch/arm/boot/dts/vexpress-v2p-ca9.dts
+++ b/arch/arm/boot/dts/vexpress-v2p-ca9.dts
@@ -69,6 +69,20 @@
reg = <0x60000000 0x40000000>;
};
+ reserved-memory {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ ranges;
+
+ /* Chipselect 3 is physically at 0x4c000000 */
+ vram: vram@4c000000 {
+ /* 8 MB of designated video RAM */
+ compatible = "shared-dma-pool";
+ reg = <0x4c000000 0x00800000>;
+ no-map;
+ };
+ };
+
clcd@10020000 {
compatible = "arm,pl111", "arm,primecell";
reg = <0x10020000 0x1000>;
@@ -76,36 +90,15 @@
interrupts = <0 44 4>;
clocks = <&oscclk1>, <&oscclk2>;
clock-names = "clcdclk", "apb_pclk";
- max-memory-bandwidth = <130000000>; /* 16bpp @ 63.5MHz */
+ /* 1024x768 16bpp @65MHz */
+ max-memory-bandwidth = <95000000>;
port {
- clcd_pads: endpoint {
- remote-endpoint = <&clcd_panel>;
+ clcd_pads_ct: endpoint {
+ remote-endpoint = <&dvi_bridge_in_ct>;
arm,pl11x,tft-r0g0b0-pads = <0 8 16>;
};
};
-
- panel {
- compatible = "panel-dpi";
-
- port {
- clcd_panel: endpoint {
- remote-endpoint = <&clcd_pads>;
- };
- };
-
- panel-timing {
- clock-frequency = <63500127>;
- hactive = <1024>;
- hback-porch = <152>;
- hfront-porch = <48>;
- hsync-len = <104>;
- vactive = <768>;
- vback-porch = <23>;
- vfront-porch = <3>;
- vsync-len = <4>;
- };
- };
};
memory-controller@100e0000 {