target/linux/bcm27xx/patches-5.4/950-0630-ARM-dts-overlays-Unify-overlay-CMA-handling.patch

From 3cd31a44e61e2219d730d6b1a4a13c8e15d6e395 Mon Sep 17 00:00:00 2001
From: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Date: Thu, 2 Apr 2020 19:54:33 +0200
Subject: [PATCH] ARM: dts: overlays: Unify overlay CMA handling

Now that we don't have to abuse the kernel command line to change CMA's
size we can clean-up and centralize CMA usage in overlays.

A new file, cma-overlay.dts is created to be used as a standalone
overlay or included on other overlays. All CMA users are converted to
this scheme. Ultimately upstream-overlay.dts is also updated to use the
default CMA size provided by upstream.

Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
---
 arch/arm/boot/dts/overlays/Makefile           |  1 +
 arch/arm/boot/dts/overlays/README             | 19 +++++
 arch/arm/boot/dts/overlays/cma-overlay.dts    | 32 ++++++++
 .../boot/dts/overlays/upstream-overlay.dts    | 56 ++++---------
 .../dts/overlays/upstream-pi4-overlay.dts     | 66 +++++----------
 .../dts/overlays/vc4-fkms-v3d-overlay.dts     | 51 ++----------
 .../boot/dts/overlays/vc4-kms-v3d-overlay.dts | 66 ++++-----------
 .../dts/overlays/vc4-kms-v3d-pi4-overlay.dts  | 80 +++++--------------
 8 files changed, 129 insertions(+), 242 deletions(-)
 create mode 100644 arch/arm/boot/dts/overlays/cma-overlay.dts

--- a/arch/arm/boot/dts/overlays/Makefile
+++ b/arch/arm/boot/dts/overlays/Makefile
@@ -28,6 +28,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
 	audiosense-pi.dtbo \
 	audremap.dtbo \
 	balena-fin.dtbo \
+	cma.dtbo \
 	dht11.dtbo \
 	dionaudio-loco.dtbo \
 	dionaudio-loco-v2.dtbo \
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -554,6 +554,19 @@ Info:   This overlay is now deprecated -
 Load:   <Deprecated>
 
 
+Name:   cma
+Info:   Set custom CMA sizes, only use if you know what you are doing, might
+        clash with other overlays like vc4-fkms-v3d and vc4-kms-v3d.
+Load:   dtoverlay=cma,<param>=<val>
+Params: cma-256                 CMA is 256MB (needs 1GB)
+        cma-192                 CMA is 192MB (needs 1GB)
+        cma-128                 CMA is 128MB
+        cma-96                  CMA is 96MB
+        cma-64                  CMA is 64MB
+        cma-size                CMA size in bytes, 4MB aligned
+        cma-default             Use upstream's default value
+
+
 Name:   dht11
 Info:   Overlay for the DHT11/DHT21/DHT22 humidity/temperature sensors
         Also sometimes found with the part number(s) AM230x.
@@ -2675,6 +2688,8 @@ Params: cma-256                 CMA is 2
         cma-128                 CMA is 128MB
         cma-96                  CMA is 96MB
         cma-64                  CMA is 64MB
+        cma-size                CMA size in bytes, 4MB aligned
+        cma-default             Use upstream's default value
 
 
 Name:   vc4-kms-kippah-7inch
@@ -2692,6 +2707,8 @@ Params: cma-256                 CMA is 2
         cma-128                 CMA is 128MB
         cma-96                  CMA is 96MB
         cma-64                  CMA is 64MB
+        cma-size                CMA size in bytes, 4MB aligned
+        cma-default             Use upstream's default value
         audio                   Enable or disable audio over HDMI (default "on")
 
 
@@ -2703,6 +2720,8 @@ Params: cma-256                 CMA is 2
         cma-128                 CMA is 128MB
         cma-96                  CMA is 96MB
         cma-64                  CMA is 64MB
+        cma-size                CMA size in bytes, 4MB aligned
+        cma-default             Use upstream's default value
         audio                   Enable or disable audio over HDMI0 (default
                                 "on")
         audio1                  Enable or disable audio over HDMI1 (default
--- /dev/null
+++ b/arch/arm/boot/dts/overlays/cma-overlay.dts
@@ -0,0 +1,32 @@
+/*
+ * cma.dts
+ */
+
+/dts-v1/;
+/plugin/;
+
+/ {
+	compatible = "brcm,bcm2835";
+
+	fragment@0 {
+		target = <&cma>;
+		frag0: __overlay__ {
+			/*
+			 * The default size when using this overlay is 256 MB
+			 * and should be kept as is for backwards
+			 * compatibility.
+			 */
+			size = <0x10000000>;
+		};
+	};
+
+	__overrides__ {
+		cma-256 = <&frag0>,"size:0=",<0x10000000>;
+		cma-192 = <&frag0>,"size:0=",<0xC000000>;
+		cma-128 = <&frag0>,"size:0=",<0x8000000>;
+		cma-96  = <&frag0>,"size:0=",<0x6000000>;
+		cma-64  = <&frag0>,"size:0=",<0x4000000>;
+		cma-size = <&frag0>,"size:0"; /* in bytes, 4MB aligned */
+		cma-default = <0>,"-0";
+	};
+};
--- a/arch/arm/boot/dts/overlays/upstream-overlay.dts
+++ b/arch/arm/boot/dts/overlays/upstream-overlay.dts
@@ -1,4 +1,4 @@
-// redo: ovmerge -c vc4-kms-v3d-overlay.dts,cma-96 dwc2-overlay.dts,dr_mode=otg
+// redo: ovmerge -c vc4-kms-v3d-overlay.dts,cma-default dwc2-overlay.dts,dr_mode=otg
 
 /dts-v1/;
 /plugin/;
@@ -8,114 +8,90 @@
 / {
 	compatible = "brcm,bcm2835";
 	fragment@0 {
-		target-path = "/chosen";
+		target = <&cma>;
 		__dormant__ {
-			bootargs = "cma=256M";
+			size = <0x10000000>;
 		};
 	};
 	fragment@1 {
-		target-path = "/chosen";
-		__dormant__ {
-			bootargs = "cma=192M";
-		};
-	};
-	fragment@2 {
-		target-path = "/chosen";
-		__dormant__ {
-			bootargs = "cma=128M";
-		};
-	};
-	fragment@3 {
-		target-path = "/chosen";
-		__overlay__ {
-			bootargs = "cma=96M";
-		};
-	};
-	fragment@4 {
-		target-path = "/chosen";
-		__dormant__ {
-			bootargs = "cma=64M";
-		};
-	};
-	fragment@5 {
 		target = <&i2c2>;
 		__overlay__ {
 			status = "okay";
 		};
 	};
-	fragment@6 {
+	fragment@2 {
 		target = <&fb>;
 		__overlay__ {
 			status = "disabled";
 		};
 	};
-	fragment@7 {
+	fragment@3 {
 		target = <&pixelvalve0>;
 		__overlay__ {
 			status = "okay";
 		};
 	};
-	fragment@8 {
+	fragment@4 {
 		target = <&pixelvalve1>;
 		__overlay__ {
 			status = "okay";
 		};
 	};
-	fragment@9 {
+	fragment@5 {
 		target = <&pixelvalve2>;
 		__overlay__ {
 			status = "okay";
 		};
 	};
-	fragment@10 {
+	fragment@6 {
 		target = <&hvs>;
 		__overlay__ {
 			status = "okay";
 		};
 	};
-	fragment@11 {
+	fragment@7 {
 		target = <&hdmi>;
 		__overlay__ {
 			status = "okay";
 		};
 	};
-	fragment@12 {
+	fragment@8 {
 		target = <&v3d>;
 		__overlay__ {
 			status = "okay";
 		};
 	};
-	fragment@13 {
+	fragment@9 {
 		target = <&vc4>;
 		__overlay__ {
 			status = "okay";
 		};
 	};
-	fragment@14 {
+	fragment@10 {
 		target = <&clocks>;
 		__overlay__ {
 			claim-clocks = <BCM2835_PLLD_DSI0 BCM2835_PLLD_DSI1 BCM2835_PLLH_AUX BCM2835_PLLH_PIX>;
 		};
 	};
-	fragment@15 {
+	fragment@11 {
 		target = <&vec>;
 		__overlay__ {
 			status = "okay";
 		};
 	};
-	fragment@16 {
+	fragment@12 {
 		target = <&txp>;
 		__overlay__ {
 			status = "okay";
 		};
 	};
-	fragment@17 {
+	fragment@13 {
 		target = <&hdmi>;
 		__dormant__ {
 			dmas;
 		};
 	};
-	fragment@18 {
+	fragment@14 {
 		target = <&usb>;
 		#address-cells = <1>;
 		#size-cells = <1>;
--- a/arch/arm/boot/dts/overlays/upstream-pi4-overlay.dts
+++ b/arch/arm/boot/dts/overlays/upstream-pi4-overlay.dts
@@ -8,144 +8,120 @@
 / {
 	compatible = "brcm,bcm2835";
 	fragment@0 {
-		target-path = "/chosen";
-		__dormant__ {
-			bootargs = "cma=256M";
-		};
-	};
-	fragment@1 {
-		target-path = "/chosen";
-		__dormant__ {
-			bootargs = "cma=192M";
-		};
-	};
-	fragment@2 {
-		target-path = "/chosen";
-		__dormant__ {
-			bootargs = "cma=128M";
-		};
-	};
-	fragment@3 {
-		target-path = "/chosen";
+		target = <&cma>;
 		__overlay__ {
-			bootargs = "cma=96M";
+			size = <100663296>;
 		};
 	};
-	fragment@4 {
-		target-path = "/chosen";
-		__dormant__ {
-			bootargs = "cma=64M";
-		};
-	};
-	fragment@5 {
+	fragment@1 {
 		target = <&ddc0>;
 		__overlay__ {
 			status = "okay";
 		};
 	};
-	fragment@6 {
+	fragment@2 {
 		target = <&ddc1>;
 		__overlay__ {
 			status = "okay";
 		};
 	};
-	fragment@7 {
+	fragment@3 {
 		target = <&hdmi0>;
 		__overlay__ {
 			status = "okay";
 		};
 	};
-	fragment@8 {
+	fragment@4 {
 		target = <&hdmi1>;
 		__overlay__ {
 			status = "okay";
 		};
 	};
-	fragment@9 {
+	fragment@5 {
 		target = <&hvs>;
 		__overlay__ {
 			status = "okay";
 		};
 	};
-	fragment@10 {
+	fragment@6 {
 		target = <&pixelvalve0>;
 		__overlay__ {
 			status = "okay";
 		};
 	};
-	fragment@11 {
+	fragment@7 {
 		target = <&pixelvalve1>;
 		__overlay__ {
 			status = "okay";
 		};
 	};
-	fragment@12 {
+	fragment@8 {
 		target = <&pixelvalve2>;
 		__overlay__ {
 			status = "okay";
 		};
 	};
-	fragment@13 {
+	fragment@9 {
 		target = <&pixelvalve3>;
 		__overlay__ {
 			status = "okay";
 		};
 	};
-	fragment@14 {
+	fragment@10 {
 		target = <&pixelvalve4>;
 		__overlay__ {
 			status = "okay";
 		};
 	};
-	fragment@15 {
+	fragment@11 {
 		target = <&v3d>;
 		__overlay__ {
 			status = "okay";
 		};
 	};
-	fragment@16 {
+	fragment@12 {
 		target = <&vc4>;
 		__overlay__ {
 			status = "okay";
 		};
 	};
-	fragment@17 {
+	fragment@13 {
 		target = <&txp>;
 		__overlay__ {
 			status = "okay";
 		};
 	};
-	fragment@18 {
+	fragment@14 {
 		target = <&fb>;
 		__overlay__ {
 			status = "disabled";
 		};
 	};
-	fragment@19 {
+	fragment@15 {
 		target = <&firmwarekms>;
 		__overlay__ {
 			status = "disabled";
 		};
 	};
-	fragment@20 {
+	fragment@16 {
 		target = <&vec>;
 		__overlay__ {
 			status = "disabled";
 		};
 	};
-	fragment@21 {
+	fragment@17 {
 		target = <&hdmi0>;
 		__dormant__ {
 			dmas;
 		};
 	};
-	fragment@22 {
+	fragment@18 {
 		target = <&hdmi1>;
 		__dormant__ {
 			dmas;
 		};
 	};
-	fragment@23 {
+	fragment@19 {
 		target = <&usb>;
 		#address-cells = <1>;
 		#size-cells = <1>;
--- a/arch/arm/boot/dts/overlays/vc4-fkms-v3d-overlay.dts
+++ b/arch/arm/boot/dts/overlays/vc4-fkms-v3d-overlay.dts
@@ -5,77 +5,36 @@
 /dts-v1/;
 /plugin/;
 
+#include "cma-overlay.dts"
+
 / {
 	compatible = "brcm,bcm2835";
 
-	fragment@0 {
-		target-path = "/chosen";
-		__overlay__ {
-			bootargs = "cma=256M";
-		};
-	};
-
 	fragment@1 {
-		target-path = "/chosen";
-		__dormant__ {
-			bootargs = "cma=192M";
-		};
-	};
-
-	fragment@2 {
-		target-path = "/chosen";
-		__dormant__ {
-			bootargs = "cma=128M";
-		};
-	};
-
-	fragment@3 {
-		target-path = "/chosen";
-		__dormant__ {
-			bootargs = "cma=96M";
-		};
-	};
-
-	fragment@4 {
-		target-path = "/chosen";
-		__dormant__ {
-			bootargs = "cma=64M";
-		};
-	};
-
-	fragment@5 {
 		target = <&fb>;
 		__overlay__  {
 			status = "disabled";
 		};
 	};
 
-	fragment@6 {
+	fragment@2 {
 		target = <&firmwarekms>;
 		__overlay__  {
 			status = "okay";
 		};
 	};
 
-	fragment@7 {
+	fragment@3 {
 		target = <&v3d>;
 		__overlay__  {
 			status = "okay";
 		};
 	};
 
-	fragment@8 {
+	fragment@4 {
 		target = <&vc4>;
 		__overlay__  {
 			status = "okay";
 		};
 	};
-
-	__overrides__ {
-		cma-256 = <0>,"+0-1-2-3-4";
-		cma-192 = <0>,"-0+1-2-3-4";
-		cma-128 = <0>,"-0-1+2-3-4";
-		cma-96  = <0>,"-0-1-2+3-4";
-		cma-64  = <0>,"-0-1-2-3+4";
-	};
 };
--- a/arch/arm/boot/dts/overlays/vc4-kms-v3d-overlay.dts
+++ b/arch/arm/boot/dts/overlays/vc4-kms-v3d-overlay.dts
@@ -7,108 +7,75 @@
 
 #include <dt-bindings/clock/bcm2835.h>
 
+#include "cma-overlay.dts"
+
 / {
 	compatible = "brcm,bcm2835";
 
-	fragment@0 {
-		target-path = "/chosen";
-		__overlay__ {
-			bootargs = "cma=256M";
-		};
-	};
-
 	fragment@1 {
-		target-path = "/chosen";
-		__dormant__ {
-			bootargs = "cma=192M";
-		};
-	};
-
-	fragment@2 {
-		target-path = "/chosen";
-		__dormant__ {
-			bootargs = "cma=128M";
-		};
-	};
-
-	fragment@3 {
-		target-path = "/chosen";
-		__dormant__ {
-			bootargs = "cma=96M";
-		};
-	};
-
-	fragment@4 {
-		target-path = "/chosen";
-		__dormant__ {
-			bootargs = "cma=64M";
-		};
-	};
-
-	fragment@5 {
 		target = <&i2c2>;
 		__overlay__  {
 			status = "okay";
 		};
 	};
 
-	fragment@6 {
+	fragment@2 {
 		target = <&fb>;
 		__overlay__  {
 			status = "disabled";
 		};
 	};
 
-	fragment@7 {
+	fragment@3 {
 		target = <&pixelvalve0>;
 		__overlay__  {
 			status = "okay";
 		};
 	};
 
-	fragment@8 {
+	fragment@4 {
 		target = <&pixelvalve1>;
 		__overlay__  {
 			status = "okay";
 		};
 	};
 
-	fragment@9 {
+	fragment@5 {
 		target = <&pixelvalve2>;
 		__overlay__  {
 			status = "okay";
 		};
 	};
 
-	fragment@10 {
+	fragment@6 {
 		target = <&hvs>;
 		__overlay__  {
 			status = "okay";
 		};
 	};
 
-	fragment@11 {
+	fragment@7 {
 		target = <&hdmi>;
 		__overlay__  {
 			status = "okay";
 		};
 	};
 
-	fragment@12 {
+	fragment@8 {
 		target = <&v3d>;
 		__overlay__  {
 			status = "okay";
 		};
 	};
 
-	fragment@13 {
+	fragment@9 {
 		target = <&vc4>;
 		__overlay__  {
 			status = "okay";
 		};
 	};
 
-	fragment@14 {
+	fragment@10 {
 		target = <&clocks>;
 		__overlay__  {
 			claim-clocks = <
@@ -120,21 +87,21 @@
 		};
 	};
 
-	fragment@15 {
+	fragment@11 {
 		target = <&vec>;
 		__overlay__  {
 			status = "okay";
 		};
 	};
 
-	fragment@16 {
+	fragment@12 {
 		target = <&txp>;
 		__overlay__  {
 			status = "okay";
 		};
 	};
 
-	fragment@17 {
+	fragment@13 {
 		target = <&hdmi>;
 		__dormant__  {
 			dmas;
@@ -142,11 +109,6 @@
 	};
 
 	__overrides__ {
-		cma-256 = <0>,"+0-1-2-3-4";
-		cma-192 = <0>,"-0+1-2-3-4";
-		cma-128 = <0>,"-0-1+2-3-4";
-		cma-96  = <0>,"-0-1-2+3-4";
-		cma-64  = <0>,"-0-1-2-3+4";
 		audio   = <0>,"!17";
 	};
 };
--- a/arch/arm/boot/dts/overlays/vc4-kms-v3d-pi4-overlay.dts
+++ b/arch/arm/boot/dts/overlays/vc4-kms-v3d-pi4-overlay.dts
@@ -7,164 +7,131 @@
 
 #include <dt-bindings/clock/bcm2835.h>
 
+#include "cma-overlay.dts"
+
 / {
 	compatible = "brcm,bcm2835";
 
-	fragment@0 {
-		target-path = "/chosen";
-		__overlay__ {
-			bootargs = "cma=256M";
-		};
-	};
-
 	fragment@1 {
-		target-path = "/chosen";
-		__dormant__ {
-			bootargs = "cma=192M";
-		};
-	};
-
-	fragment@2 {
-		target-path = "/chosen";
-		__dormant__ {
-			bootargs = "cma=128M";
-		};
-	};
-
-	fragment@3 {
-		target-path = "/chosen";
-		__dormant__ {
-			bootargs = "cma=96M";
-		};
-	};
-
-	fragment@4 {
-		target-path = "/chosen";
-		__dormant__ {
-			bootargs = "cma=64M";
-		};
-	};
-
-	fragment@5 {
 		target = <&ddc0>;
 		__overlay__  {
 			status = "okay";
 		};
 	};
 
-	fragment@6 {
+	fragment@2 {
 		target = <&ddc1>;
 		__overlay__  {
 			status = "okay";
 		};
 	};
 
-	fragment@7 {
+	fragment@3 {
 		target = <&hdmi0>;
 		__overlay__  {
 			status = "okay";
 		};
 	};
 
-	fragment@8 {
+	fragment@4 {
 		target = <&hdmi1>;
 		__overlay__  {
 			status = "okay";
 		};
 	};
 
-	fragment@9 {
+	fragment@5 {
 		target = <&hvs>;
 		__overlay__  {
 			status = "okay";
 		};
 	};
 
-	fragment@10 {
+	fragment@6 {
 		target = <&pixelvalve0>;
 		__overlay__  {
 			status = "okay";
 		};
 	};
 
-	fragment@11 {
+	fragment@7 {
 		target = <&pixelvalve1>;
 		__overlay__  {
 			status = "okay";
 		};
 	};
 
-	fragment@12 {
+	fragment@8 {
 		target = <&pixelvalve2>;
 		__overlay__  {
 			status = "okay";
 		};
 	};
 
-	fragment@13 {
+	fragment@9 {
 		target = <&pixelvalve3>;
 		__overlay__  {
 			status = "okay";
 		};
 	};
 
-	fragment@14 {
+	fragment@10 {
 		target = <&pixelvalve4>;
 		__overlay__  {
 			status = "okay";
 		};
 	};
 
-	fragment@15 {
+	fragment@11 {
 		target = <&v3d>;
 		__overlay__  {
 			status = "okay";
 		};
 	};
 
-	fragment@16 {
+	fragment@12 {
 		target = <&vc4>;
 		__overlay__  {
 			status = "okay";
 		};
 	};
 
-	fragment@17 {
+	fragment@13 {
 		target = <&txp>;
 		__overlay__  {
 			status = "okay";
 		};
 	};
 
-	fragment@18 {
+	fragment@14 {
 		target = <&fb>;
 		__overlay__  {
 			status = "disabled";
 		};
 	};
 
-	fragment@19 {
+	fragment@15 {
 		target = <&firmwarekms>;
 		__overlay__  {
 			status = "disabled";
 		};
 	};
 
-	fragment@20 {
+	fragment@16 {
 		target = <&vec>;
 		__overlay__  {
 			status = "disabled";
 		};
 	};
 
-	fragment@21 {
+	fragment@17 {
 		target = <&hdmi0>;
 		__dormant__  {
 			dmas;
 		};
 	};
 
-	fragment@22 {
+	fragment@18 {
 		target = <&hdmi1>;
 		__dormant__  {
 			dmas;
@@ -172,12 +139,7 @@
 	};
 
 	__overrides__ {
-		cma-256 = <0>,"+0-1-2-3-4";
-		cma-192 = <0>,"-0+1-2-3-4";
-		cma-128 = <0>,"-0-1+2-3-4";
-		cma-96  = <0>,"-0-1-2+3-4";
-		cma-64  = <0>,"-0-1-2-3+4";
-		audio   = <0>,"!21";
-		audio1   = <0>,"!22";
+		audio   = <0>,"!17";
+		audio1   = <0>,"!18";
 	};
 };