linux for toradex module support initial import

4 files changed, 379 insertions, 0 deletions

diff --git a/yocto/README b/yocto/README
new file mode 100644
index 0000000..ef99121
--- /dev/null
+++ b/yocto/README
@@ -0,0 +1,179 @@
+- release matrix page:
+https://developer.toradex.com/software/toradex-embedded-software/embedded-linux-release-matrix/
+
+- resources:
+https://docs.u-boot.org/en/stable/board/toradex/verdin-imx8mp.html
+https://developer.toradex.com/linux-bsp/os-development/build-yocto/build-a-reference-image-with-yocto-projectopenembedded/
+https://developer.toradex.com/linux-bsp/os-development/build-u-boot-and-linux-kernel-from-source-code/build-u-boot/
+https://developer.toradex.com/linux-bsp/os-development/build-u-boot-and-linux-kernel-from-source-code/build-linux-kernel-from-source-code/
+https://developer.toradex.com/linux-bsp/os-development/build-u-boot-and-linux-kernel-from-source-code/build-device-tree-overlays-from-source-code/
+
+- install dependencies:
+# dependencies for yocto:
+apt-get install gawk wget git diffstat unzip texinfo gcc build-essential chrpath socat cpio python3 python3-pip python3-pexpect xz-utils debianutils iputils-ping python3-git python3-jinja2 python3-subunit zstd liblz4-tool file locales libacl1
+apt-get install curl git 
+
+# dependencies for u-boot:
+apt-get install bc build-essential git libncurses5-dev lzop perl libssl-dev bison flex swig libyaml-dev pkg-config python3-dev
+apt-get install u-boot-tools
+
+# dependencies for kernel:
+ apt-get install bc build-essential git libncurses5-dev lzop perl libssl-dev bison flex
+apt-get install u-boot-tools
+
+locale-gen en_US.UTF-8
+# configure git
+git config --global user.name "John Doe"
+git config --global user.email johndoe@example.com
+
+- make build directory:
+mkdir /build
+cd build
+
+
+prepare build environment
+-------------------------
+
+mkdir /build/tools
+cd /build/tools
+
+- install repo bootstrap binary:
+mkdir bin
+curl https://commondatastorage.googleapis.com/git-repo-downloads/repo > bin/repo
+chmod 755 bin/repo
+
+- install the ARM GCC toolchain:
+mkdir arm
+cd arm
+wget https://developer.arm.com/-/media/Files/downloads/gnu/14.2.rel1/binrel/arm-gnu-toolchain-14.2.rel1-x86_64-aarch64-none-linux-gnu.tar.xz
+tar xvf arm-gnu-toolchain-14.2.rel1-x86_64-aarch64-none-linux-gnu.tar.xz
+ln -s arm-gnu-toolchain-14.2.rel1-x86_64-aarch64-none-linux-gnu gcc-linaro-aarch64
+cd ..
+
+- install device tree compiler tool:
+git clone https://git.kernel.org/pub/scm/utils/dtc/dtc.git -b v1.7.2
+cd dtc
+make
+cp dtc ../bin/
+cd ..
+
+- export variables:
+cd ..
+vi start.sh
+...
+export ARCH=arm64
+export DTC_FLAGS="-@"
+export PATH=/build/tools/gcc-linaro-aarch64/bin:/build/tools/bin:$PATH
+export CROSS_COMPILE=aarch64-none-linux-gnu-
+...
+chmod 755 start.sh
+. ./start.sh
+
+
+yocto image
+-----------
+
+- clone meta-information
+mkdir oe-core
+cd oe-core
+# branch: repo init -u git://git.toradex.com/toradex-manifest.git -b scarthgap-7.x.y -m tdxref/default.xml
+# specific tag:
+repo init -u git://git.toradex.com/toradex-manifest.git -b refs/tags/7.1.0 -m tdxref/default.xml
+repo sync
+# repeat sync until successful
+
+- setup environment:
+. export
+
+- edit config:
+vi conf/local.conf
+...
+# set MACHINE:
+MACHINE ?= "verdin-imx8mp"
+# append:
+ACCEPT_FSL_EULA = "1"
+TOOLCHAIN_TARGET_TASK:append = " kernel-devsrc"
+...
+
+- build:
+bitbake -k tdx-reference-minimal-image -c populate_sdk
+
+- machine.conf in: layers/meta-toradex-nxp/conf/machine/verdin-imx8mp.conf
+- distro.conf in: layers/meta-toradex-distro/conf/distro/*.conf
+- demo images in: layers/meta-toradex-demos/recipes-images/images/*.bb
+
+u-boot
+------
+
+cd /build
+git clone https://source.denx.de/u-boot/u-boot.git
+cd u-boot
+# adjust tag according to version used in yocto (from release matrix page)
+git checkout tags/v2024.07
+git checkout -b toradex-v2024.07
+mkdir patches
+cd patches
+cp ../../oe-core/layers/meta-toradex-bsp-common/recipes-bsp/u-boot/u-boot-toradex/* .
+# adjust recipe according to version used in yocto (from release matrix page) 
+PATCH_RECIPE=../../oe-core/layers/meta-toradex-bsp-common/recipes-bsp/u-boot/u-boot-toradex_2024.07.bb 
+# apply patches in order
+git am `grep -n TDX_PATCHES $PATCH_RECIPE | echo $((\`cut -f1 -d:\` + 1)) | xargs -I line_no tail $PATCH_RECIPE --lines=+line_no | grep -v ^\" | cut -d / -f 3 | sed -e "s/ \\\\\\\\//g"`
+cd ..
+# build ATF (TF-A)
+git clone https://git.trustedfirmware.org/TF-A/trusted-firmware-a.git 
+cd trusted-firmware-a
+make PLAT=imx8mp IMX_BOOT_UART_BASE=0x30880000 bl31
+cp build/imx8mp/release/bl31.bin ..
+cd ..
+# get DDR firmware
+wget https://www.nxp.com/lgfiles/NMG/MAD/YOCTO/firmware-imx-8.10.1.bin
+chmod +x firmware-imx-8.10.1.bin
+./firmware-imx-8.10.1.bin
+cp firmware-imx-8.10.1/firmware/ddr/synopsys/lpddr4*_202006.bin .
+# finally, build u-boot
+make mrproper
+make verdin-imx8mp_defconfig 
+# dts in: dts/upstream/src/arm64/freescale/imx8mp-verdin-wifi-*.dts
+#         arch/arm/dts/imx8mp-verdin-wifi-dev-u-boot.dtsi
+# make menuconfig (choose dts to build)
+make -j$(nproc) 2>&1 | tee build.log
+
+
+kernel
+------
+
+cd /build
+# adjust branch and commit according to version used in yocto:
+# vi oe-core/layers/meta-toradex-nxp/recipes-kernel/linux/linux-toradex_*.bb (search for SRCBRANCH, SRCREV_machine)
+git clone -b toradex_6.6-2.1.x-imx git://git.toradex.com/linux-toradex.git
+cd linux-toradex
+git checkout 3493ccd66900420e2462daf4db187b315b50469e
+cp ../oe-core/build/deploy/images/verdin-imx8mp/kernel-config .config
+# verify config
+make olddefconfig
+# copy yocto/kernel_lvds_freq.patch from mikroPhone repo
+# apply LVDS patch
+patch < ../kernel_lvds_freq.patch
+# build kernel and dtb
+make -j$(nproc) Image.gz 2>&1 | tee build.log
+make freescale/imx8mp-verdin-wifi-dev.dtb
+# ls ./arch/arm64/boot/Image.gz
+# ls ./arch/arm64/boot/dts/freescale/imx8mp-verdin-wifi-dev.dtb
+# build kernel modules
+make -j$(nproc) modules 2>&1 | tee build.log
+mkdir modules
+INSTALL_MOD_PATH=`pwd`/modules make modules_install
+cd modules
+tar -czf ../modules.tar.gz .
+cd ..
+
+
+overlay
+-------
+
+# toradex overlays (match branch to kernel branch)
+# git clone -b toradex_6.6-2.1.x-imx git://git.toradex.com/device-tree-overlays.git
+# copy yocto/overlays from mikroPhone repo
+cd overlays
+STAGING_KERNEL_DIR=../linux-toradex make mikroPhone-panel_overlay.dtbo
+cd ..
diff --git a/yocto/kernel_lvds_freq.patch b/yocto/kernel_lvds_freq.patch
new file mode 100644
index 0000000..9955bc4
--- /dev/null
+++ b/yocto/kernel_lvds_freq.patch
@@ -0,0 +1,62 @@
+diff --git a/arch/arm64/boot/dts/freescale/imx8mp.dtsi b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
+index 55adf1bf45d9..c875474e6c45 100644
+--- a/arch/arm64/boot/dts/freescale/imx8mp.dtsi
++++ b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
+@@ -752,7 +752,7 @@ clk: clock-controller@30380000 {
+ 						       <800000000>,
+ 						       <393216000>,
+ 						       <361267200>,
+-						       <1039500000>;
++						       <252000000>;
+ 			};
+ 
+ 			src: reset-controller@30390000 {
+diff --git a/drivers/clk/imx/clk-pll14xx.c b/drivers/clk/imx/clk-pll14xx.c
+index 6c17786ecb9f..8c9840f08c0e 100644
+--- a/drivers/clk/imx/clk-pll14xx.c
++++ b/drivers/clk/imx/clk-pll14xx.c
+@@ -75,6 +75,7 @@ static const struct imx_pll14xx_rate_table imx_pll1443x_tbl[] = {
+ 	PLL_1443X_RATE(49152000U, 393, 3, 6, 0x374c),
+ 	PLL_1443X_RATE(45158400U, 241, 2, 6, 0xd845),
+ 	PLL_1443X_RATE(40960000U, 109, 1, 6, 0x3a07),
++	PLL_1443X_RATE(252000000U, 84, 2, 2, 0),
+ };
+ 
+ struct imx_pll14xx_clk imx_1443x_pll = {
+diff --git a/drivers/gpu/drm/imx/imx8mp-ldb.c b/drivers/gpu/drm/imx/imx8mp-ldb.c
+index e3f5c5e6e842..55dbafa863cf 100644
+--- a/drivers/gpu/drm/imx/imx8mp-ldb.c
++++ b/drivers/gpu/drm/imx/imx8mp-ldb.c
+@@ -186,15 +186,6 @@ imx8mp_ldb_encoder_atomic_check(struct drm_encoder *encoder,
+ 		return -EINVAL;
+ 	}
+ 
+-	/*
+-	 * Due to limited video PLL frequency points on i.MX8mp,
+-	 * we do mode fixup here in case any mode is unsupported.
+-	 */
+-	if (ldb->dual)
+-		mode->clock = mode->clock > 100000 ? 148500 : 74250;
+-	else
+-		mode->clock = 74250;
+-
+ 	return 0;
+ }
+ 
+@@ -212,16 +203,6 @@ imx8mp_ldb_encoder_mode_valid(struct drm_encoder *encoder,
+ 	if (ldb_ch->panel)
+ 		return MODE_OK;
+ 
+-	/*
+-	 * Due to limited video PLL frequency points on i.MX8mp,
+-	 * we do mode valid check here.
+-	 */
+-	if (ldb->dual && mode->clock != 74250 && mode->clock != 148500)
+-		return MODE_NOCLOCK;
+-
+-	if (!ldb->dual && mode->clock != 74250)
+-		return MODE_NOCLOCK;
+-
+ 	return MODE_OK;
+ }
+ 
diff --git a/yocto/overlays/Makefile b/yocto/overlays/Makefile
new file mode 100644
index 0000000..b574d5d
--- /dev/null
+++ b/yocto/overlays/Makefile
@@ -0,0 +1,7 @@
+DTC ?= dtc
+
+P = .preprocessed
+%.dtbo: %.dts
+	cpp -nostdinc -I "$(STAGING_KERNEL_DIR)/arch/arm64/boot/dts" -I "$(STAGING_KERNEL_DIR)/include" -undef -x assembler-with-cpp $< $<$P
+	$(DTC) $(DTC_FLAGS) -Hepapr -I dts -O dtb -i "$(STAGING_KERNEL_DIR)/arch/arm64/boot/dts/" -o $@ $<$P
+	rm $<$P
diff --git a/yocto/overlays/mikroPhone-panel_overlay.dts b/yocto/overlays/mikroPhone-panel_overlay.dts
new file mode 100644
index 0000000..0bc14b3
--- /dev/null
+++ b/yocto/overlays/mikroPhone-panel_overlay.dts
@@ -0,0 +1,131 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+/*
+ * Copyright 2023 Toradex
+ */
+
+// adapted from: https://git.toradex.com/cgit/device-tree-overlays.git/tree/overlays/verdin-imx8mp_panel-cap-touch-10inch-lvds_overlay.dts?h=toradex_6.6-2.2.x-imx
+// Verdin iMX8M Plus single-channel LVDS
+
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/interrupt-controller/irq.h>
+#include <dt-bindings/pwm/pwm.h>
+#include "freescale/imx8mp-pinfunc.h"
+
+/ {
+	compatible = "toradex,verdin-imx8mp";
+};
+
+&{/} {
+	backlight_lvds_native: backlight-lvds-native {
+		compatible = "pwm-backlight";
+		pinctrl-names = "default";
+		brightness-levels = <0 45 63 88 119 158 203 255>;
+		default-brightness-level = <4>;
+		/* Verdin PWM_1 (SODIMM 15) */
+		pwms = <&pwm1 0 6666667>;
+	};
+
+	panel-lvds-native {
+		compatible = "panel-lvds";
+		backlight = <&backlight_lvds_native>;
+		data-mapping = "vesa-24";
+		height-mm = <136>;
+		width-mm = <217>;
+
+		panel-timing {
+			clock-frequency = <36000000>;
+			hactive = <480>;
+			hfront-porch = <23 60 71>;
+			hsync-len = <15 40 47>;
+			hback-porch = <23 60 71>;
+
+			vactive = <854>;
+			vfront-porch = <5 7 10>;
+			vsync-len = <6 9 12>;
+			vback-porch = <5 7 10>;
+
+			hsync-active = <0>;
+			vsync-active = <0>;
+			de-active = <0>;
+			pixelclk-active = <1>; /* positive edge */
+		};
+
+		port {
+			panel_lvds_native_in: endpoint {
+				remote-endpoint = <&lvds_out>;
+			};
+		};
+	};
+};
+
+&gpu_2d {
+	status = "okay";
+};
+
+&gpu_3d {
+	status = "okay";
+};
+
+/* Verdin I2C_1 */
+&i2c1 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+	status = "okay";
+
+	gt911@5d {
+		compatible = "goodix,gt911";
+		reg = <0x5d>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&gpio1>;
+		/* Verdin GPIO_3 (SODIMM 210) */
+		interrupt-parent = <&gpio1>;
+		interrupts = <5 IRQ_TYPE_EDGE_FALLING>;
+		/* Verdin GPIO_4 (SODIMM 212) */
+		reset-gpios = <&gpio1 6 GPIO_ACTIVE_LOW>;
+		status = "okay";
+	};
+};
+
+&lcdif2 {
+	status = "okay";
+};
+
+&ldb {
+	status = "okay";
+
+	lvds-channel@0 {
+		#address-cells = <1>;
+		#size-cells = <0>;
+		fsl,data-mapping = "spwg";
+		fsl,data-width = <24>;
+		status = "okay";
+
+		port@1 {
+			reg = <1>;
+
+			lvds_out: endpoint {
+				remote-endpoint = <&panel_lvds_native_in>;
+			};
+		};
+	};
+};
+
+&ldb_phy {
+	status = "okay";
+};
+
+&mix_gpu_ml {
+	status = "okay";
+};
+
+&ml_vipsi {
+	status = "okay";
+};
+
+/* Verdin PWM_2 */
+&pwm1 {
+	status = "okay";
+};