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190 lines
4.7 KiB
Diff
190 lines
4.7 KiB
Diff
From 5395497a794d793f9657e3317634ad8e5003277f Mon Sep 17 00:00:00 2001
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From: Eric Anholt <eric@anholt.net>
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Date: Wed, 14 Sep 2016 08:52:26 +0100
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Subject: [PATCH] BCM270X: Add an overlay for enabling the vc4 driver in
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firmware-KMS mode.
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This gets us normal 3D support on top of the existing firmware display
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stack. There's no real modesetting support, no async pageflips
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(hurting performance), etc., but it means that the desktop can at
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least run until we get full native modesetting.
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Signed-off-by: Eric Anholt <eric@anholt.net>
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---
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arch/arm/boot/dts/bcm2708_common.dtsi | 31 +++++---
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arch/arm/boot/dts/overlays/Makefile | 1 +
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arch/arm/boot/dts/overlays/README | 11 +++
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.../arm/boot/dts/overlays/vc4-fkms-v3d-overlay.dts | 89 ++++++++++++++++++++++
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4 files changed, 121 insertions(+), 11 deletions(-)
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create mode 100644 arch/arm/boot/dts/overlays/vc4-fkms-v3d-overlay.dts
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--- a/arch/arm/boot/dts/bcm2708_common.dtsi
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+++ b/arch/arm/boot/dts/bcm2708_common.dtsi
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@@ -284,6 +284,26 @@
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status = "disabled";
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};
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+ firmwarekms: firmwarekms@7e600000 {
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+ compatible = "raspberrypi,rpi-firmware-kms";
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+ /* SMI interrupt reg */
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+ reg = <0x7e600000 0x100>;
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+ interrupts = <2 16>;
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+ brcm,firmware = <&firmware>;
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+ status = "disabled";
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+ };
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+
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+ smi: smi@7e600000 {
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+ compatible = "brcm,bcm2835-smi";
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+ reg = <0x7e600000 0x44>, <0x7e1010b0 0x8>;
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+ interrupts = <2 16>;
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+ brcm,smi-clock-source = <6>;
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+ brcm,smi-clock-divisor = <4>;
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+ dmas = <&dma 4>;
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+ dma-names = "rx-tx";
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+ status = "disabled";
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+ };
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+
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dsi1: dsi@7e700000 {
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#address-cells = <1>;
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#size-cells = <0>;
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@@ -325,17 +345,6 @@
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status = "disabled";
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};
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- smi: smi@7e600000 {
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- compatible = "brcm,bcm2835-smi";
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- reg = <0x7e600000 0x44>, <0x7e1010b0 0x8>;
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- interrupts = <2 16>;
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- brcm,smi-clock-source = <6>;
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- brcm,smi-clock-divisor = <4>;
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- dmas = <&dma 4>;
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- dma-names = "rx-tx";
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- status = "disabled";
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- };
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-
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pixelvalve2: pixelvalve@7e807000 {
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compatible = "brcm,bcm2835-pixelvalve2";
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reg = <0x7e807000 0x100>;
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--- a/arch/arm/boot/dts/overlays/Makefile
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+++ b/arch/arm/boot/dts/overlays/Makefile
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@@ -96,6 +96,7 @@ dtbo-$(RPI_DT_OVERLAYS) += spi2-2cs.dtbo
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dtbo-$(RPI_DT_OVERLAYS) += spi2-3cs.dtbo
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dtbo-$(RPI_DT_OVERLAYS) += tinylcd35.dtbo
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dtbo-$(RPI_DT_OVERLAYS) += uart1.dtbo
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+dtbo-$(RPI_DT_OVERLAYS) += vc4-fkms-v3d.dtbo
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dtbo-$(RPI_DT_OVERLAYS) += vc4-kms-v3d.dtbo
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dtbo-$(RPI_DT_OVERLAYS) += vga666.dtbo
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dtbo-$(RPI_DT_OVERLAYS) += w1-gpio.dtbo
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--- a/arch/arm/boot/dts/overlays/README
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+++ b/arch/arm/boot/dts/overlays/README
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@@ -1215,6 +1215,17 @@ Params: txd1_pin GPIO pin
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rxd1_pin GPIO pin for RXD1 (15, 33 or 41 - default 15)
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+Name: vc4-fkms-v3d
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+Info: Enable Eric Anholt's DRM VC4 V3D driver on top of the dispmanx
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+ display stack.
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+Load: dtoverlay=vc4-fkms-v3d,<param>
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+Params: cma-256 CMA is 256MB, 256MB-aligned (needs 1GB)
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+ cma-192 CMA is 192MB, 256MB-aligned (needs 1GB)
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+ cma-128 CMA is 128MB, 128MB-aligned
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+ cma-96 CMA is 96MB, 128MB-aligned
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+ cma-64 CMA is 64MB, 64MB-aligned
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+
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+
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Name: vc4-kms-v3d
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Info: Enable Eric Anholt's DRM VC4 HDMI/HVS/V3D driver. Running startx or
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booting to GUI while this overlay is in use will cause interesting
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--- /dev/null
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+++ b/arch/arm/boot/dts/overlays/vc4-fkms-v3d-overlay.dts
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@@ -0,0 +1,89 @@
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+/*
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+ * vc4-fkms-v3d-overlay.dts
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+ */
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+
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+/dts-v1/;
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+/plugin/;
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+
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+/ {
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+ compatible = "brcm,bcm2835", "brcm,bcm2708", "brcm,bcm2709";
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+
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+ fragment@0 {
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+ target-path = "/chosen";
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+ __overlay__ {
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+ bootargs = "cma=256M@256M";
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+ };
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+ };
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+
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+ fragment@1 {
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+ target-path = "/chosen";
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+ __dormant__ {
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+ bootargs = "cma=192M@256M";
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+ };
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+ };
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+
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+ fragment@2 {
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+ target-path = "/chosen";
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+ __dormant__ {
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+ bootargs = "cma=128M@128M";
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+ };
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+ };
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+
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+ fragment@3 {
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+ target-path = "/chosen";
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+ __dormant__ {
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+ bootargs = "cma=96M@128M";
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+ };
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+ };
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+
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+ fragment@4 {
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+ target-path = "/chosen";
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+ __dormant__ {
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+ bootargs = "cma=64M@64M";
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+ };
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+ };
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+
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+ fragment@5 {
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+ target = <&fb>;
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+ __overlay__ {
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+ status = "disabled";
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+ };
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+ };
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+
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+ fragment@6 {
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+ target = <&firmwarekms>;
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+ __overlay__ {
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+ status = "okay";
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+ };
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+ };
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+
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+ fragment@7 {
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+ target = <&v3d>;
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+ __overlay__ {
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+ interrupts = <1 10>;
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+ status = "okay";
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+ };
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+ };
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+
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+ fragment@8 {
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+ target = <&gpu>;
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+ __overlay__ {
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+ status = "okay";
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+ };
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+ };
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+
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+ fragment@9 {
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+ target-path = "/soc/dma";
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+ __overlay__ {
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+ brcm,dma-channel-mask = <0x7f35>;
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+ };
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+ };
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+
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+ __overrides__ {
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+ cma-256 = <0>,"+0-1-2-3-4";
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+ cma-192 = <0>,"-0+1-2-3-4";
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+ cma-128 = <0>,"-0-1+2-3-4";
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+ cma-96 = <0>,"-0-1-2+3-4";
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+ cma-64 = <0>,"-0-1-2-3+4";
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+ };
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+};
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