device-xiaomi: new device (!165)

Initial support for Xiaomi A1 aka xiaomi-tissot using LineageOS 15.1
kernel, has similar board to Xiaomi Redmi 4 aka xiaomi-mido with some
differences that had to be patched such as reversing skip_initramfs and
ignoring dm param. 16.0 kernel boots but display fb init doesn't work.

Weston boots with touch support, SSH via USB RNDIS works.

[skip ci]: this built once in CI already, good to go.

device/device-xiaomi-tissot/APKBUILD

+# Reference: <https://postmarketos.org/devicepkg>
+pkgname="device-xiaomi-tissot"
+pkgdesc="Xiaomi A1"
+pkgver=0.1
+pkgrel=0
+url="https://postmarketos.org"
+license="MIT"
+arch="aarch64"
+options="!check !archcheck"
+depends="postmarketos-base linux-xiaomi-tissot mkbootimg mesa-dri-swrast msm-fb-refresher"
+makedepends="devicepkg-dev"
+source="deviceinfo
+"
+
+build() {
+	devicepkg_build $startdir $pkgname
+}
+
+package() {
+	devicepkg_package $startdir $pkgname
+}
+
+sha512sums="176aa6496dd4bc335fec4ba986348390b60233ba303d3b170650dbe3020e2a15438ca8708f2d9e5fc92e9dc8f3301fe7ba0f8840e953e4591a7bd7da22c0b459  deviceinfo"

device/device-xiaomi-tissot/deviceinfo

+# Reference: <https://postmarketos.org/deviceinfo>
+# Please use double quotes only. You can source this file in shell scripts.
+
+deviceinfo_format_version="0"
+deviceinfo_name="Xiaomi A1"
+deviceinfo_manufacturer="Xiaomi"
+deviceinfo_codename="xiaomi-tissot"
+deviceinfo_date=""
+deviceinfo_dtb=""
+deviceinfo_modules_initfs=""
+deviceinfo_arch="aarch64"
+
+# Device related
+deviceinfo_keyboard="false"
+deviceinfo_external_storage="true"
+deviceinfo_screen_width="1080"
+deviceinfo_screen_height="1920"
+deviceinfo_dev_touchscreen="/dev/input/event1"
+deviceinfo_dev_touchscreen_calibration=""
+deviceinfo_dev_keyboard=""
+
+# Bootloader related
+deviceinfo_flash_method="fastboot"
+deviceinfo_kernel_cmdline="androidboot.hardware=qcom msm_rtb.filter=0x237 ehci-hcd.park=3 lpm_levels.sleep_disabled=1 androidboot.bootdevice=7824900.sdhci earlycon=msm_hsl_uart,0x78af000 androidboot.selinux=permissive buildvariant=eng"
+deviceinfo_generate_bootimg="true"
+deviceinfo_bootimg_qcdt="false"
+deviceinfo_flash_offset_base="0x80000000"
+deviceinfo_flash_offset_kernel="0x00008000"
+deviceinfo_flash_offset_ramdisk="0x01000000"
+deviceinfo_flash_offset_second="0x00f00000"
+deviceinfo_flash_offset_tags="0x00000100"
+deviceinfo_flash_pagesize="2048"
+deviceinfo_flash_sparse="true"

device/linux-xiaomi-tissot/APKBUILD

+# Reference: <https://postmarketos.org/vendorkernel>
+# Kernel config based on: arch/arm64/configs/tissot_defconfig
+
+pkgname="linux-xiaomi-tissot"
+pkgver=3.18.71
+pkgrel=0
+pkgdesc="Xiaomi A1 kernel fork"
+arch="aarch64"
+_carch="arm64"
+_flavor="xiaomi-tissot"
+url="https://kernel.org"
+license="GPL-2.0-only"
+options="!strip !check !tracedeps"
+makedepends="perl sed installkernel bash gmp-dev bc linux-headers elfutils-dev devicepkg-dev gcc6"
+
+# Compiler: this kernel was only tested with GCC6. Feel free to make a merge
+# request if you find out that it is booting working with newer GCCs as
+# well. See <https://postmarketos.org/vendorkernel> for instructions.
+if [ "${CC:0:5}" != "gcc6-" ]; then
+	CC="gcc6-$CC"
+	HOSTCC="gcc6-gcc"
+	CROSS_COMPILE="gcc6-$CROSS_COMPILE"
+fi
+
+# Source
+_repository="android_kernel_xiaomi_msm8953"
+_commit="80cb3f607eb78280642c3b9b6e89f676e9c263bf"
+_config="config-${_flavor}.${arch}"
+source="
+	$pkgname-$_commit.tar.gz::https://github.com/LineageOS/${_repository}/archive/${_commit}.tar.gz
+	$_config
+	compiler-gcc6.h
+	fix-include-msm_isp.patch
+	fix-include-msm_camera_i2c.patch
+	fix-rndis_ipa.patch
+	fix_u_f_header.patch
+	fix_usb_gadget_function.patch
+	fix_msm_dba.patch
+	init-reverse-skip_initramfs.patch
+	init-ignore-dm-if-skip_initramfs.patch
+	tweak-warn-once-skb_release_head_state.patch
+"
+builddir="$srcdir/${_repository}-${_commit}"
+
+prepare() {
+	default_prepare
+
+	# gcc6 support
+	cp -v "$srcdir/compiler-gcc6.h" "$builddir/include/linux/"
+
+	# Remove -Werror from all makefiles
+	local i
+	local makefiles="$(find . -type f -name Makefile)
+		$(find . -type f -name Kbuild)"
+	for i in $makefiles; do
+		sed -i 's/-Werror-/-W/g' "$i"
+		sed -i 's/-Werror//g' "$i"
+	done
+
+	# Prepare kernel config ('yes ""' for kernels lacking olddefconfig)
+	cp "$srcdir"/$_config "$builddir"/.config
+	yes "" | make ARCH="$_carch" HOSTCC="$HOSTCC" oldconfig
+}
+
+build() {
+	unset LDFLAGS
+	make ARCH="$_carch" CC="${CC:-gcc}" \
+		KBUILD_BUILD_VERSION="$((pkgrel + 1 ))-postmarketOS"
+	msg "Combine DTB and Image.gz"
+	msg "(Image.gz-dtb without DTB itself ¯\_(ツ)_/¯)"
+	rm "$builddir/arch/$_carch/boot/Image.gz-dtb"
+	cat "$builddir/arch/$_carch/boot/Image.gz" \
+		"$builddir/arch/$_carch/boot/dts/qcom/msm8953-qrd-sku3-tissot.dtb" \
+		> "$builddir/arch/$_carch/boot/Image.gz-dtb"
+}
+
+package() {
+	# kernel.release
+	install -D "$builddir/include/config/kernel.release" \
+		"$pkgdir/usr/share/kernel/$_flavor/kernel.release"
+
+	# zImage (find the right one)
+	cd "$builddir/arch/$_carch/boot"
+	_target="$pkgdir/boot/vmlinuz-$_flavor"
+	for _zimg in zImage-dtb Image.gz-dtb *zImage Image; do
+		[ -e "$_zimg" ] || continue
+		msg "zImage found: $_zimg"
+		install -Dm644 "$_zimg" "$_target"
+		break
+	done
+	if ! [ -e "$_target" ]; then
+		error "Could not find zImage in $PWD!"
+		return 1
+	fi
+}
+
+sha512sums="f0bba3e19e8cad92cabaeba63db75af9b2cf1e5fa7e79c7688c487c55db0230840ab838628b8aaf6a39a03d403237ab224aa94fac88eb538b82cb7909f35e43d  linux-xiaomi-tissot-80cb3f607eb78280642c3b9b6e89f676e9c263bf.tar.gz
+54ad078eb8b54037fb1d4191a45a8ebded6ac5e95e7bea41d0f20a75feed5b0dd0654ee1fd17a942939f8953e4f25781559e5f8fb170c58d2e2e6783f0405375  config-xiaomi-tissot.aarch64
+d80980e9474c82ba0ef1a6903b434d8bd1b092c40367ba543e72d2c119301c8b2d05265740e4104ca1ac5d15f6c4aa49e8776cb44264a9a28dc551e0d1850dcc  compiler-gcc6.h
+a7acfa838563cb3a0da85b0b580b8b6873e87a21c83d060bbacf0f159672353db65d2f5d1d74cfd3b8640336db1b56aa4868dea8dd5eaba6366bc7050624608f  fix-include-msm_isp.patch
+e4a9fca760b22c71ecc6b749afeec0bf2e5571bcde9c3d25612402ee406e2ccdebc6fb1e353851190e948bcda00ed37f7d1bb6c26c08557fda02f37811c80cc7  fix-include-msm_camera_i2c.patch
+c35a7337ddee41ea355bc3040e258c111b92c62413e355d7fe1329f516f8bdf724bab0cb8f426aee96fc776a8297e7a3ec5414120248538e0ee0ac3265790fbd  fix-rndis_ipa.patch
+b408f157cc025d410b38f5aee9be977e670e1ac3f195f6c3a6681446fa0c3887067d62a4f729cfcd058fab42fca355b0265764dc2d21515f6e023ed025f55d41  fix_u_f_header.patch
+1f23466d1a864f2d2c67ae4250b0c166ecb7755779bbdad6732808a001cc2826cc1d013c2281d2ca1d5abd7d60d13783f0b9f11bb8359971f2b30b911e627220  fix_usb_gadget_function.patch
+7e765cb696fa8c3dfbc305b05cbf1fad85fb9572613d5391e945341dae5974a745f4906c795dc841e5562b19ab77d5257f9741e514af2c2573aa4bb8b262ce51  fix_msm_dba.patch
+32f8180ae59351835f91ead8e38ae4933658c13bfe62bdbb32de82aecb16e1ff9e96333f4f129423ae8be4dc3210ee3bbf3fd0ea199df0f397ecb2f2efe37bcb  init-reverse-skip_initramfs.patch
+d97b343970bba978b0c99222e01d3a66abba9d7fe5725705021b4ab2895dd18df2c68bfbb894f05f2894714b958e1aa63ed5e09d19cbbff1204fdc7f246891b4  init-ignore-dm-if-skip_initramfs.patch
+170a979908156f740d32fc3a8f74c2b2cb54420e12b81f2373fed1eb095159f1e03d3c24116a345f41ccd927fd93594b0a0e4b58a57ffe6869288f1ec030078c  tweak-warn-once-skb_release_head_state.patch"

device/linux-xiaomi-tissot/compiler-gcc6.h

+// SOURCE:
+// https://github.com/NextThingCo/CHIP-u-boot/issues/10#issuecomment-287515505
+
+#ifndef __LINUX_COMPILER_H
+#error "Please don't include <linux/compiler-gcc6.h> directly, include <linux/compiler.h> instead."
+#endif
+
+#define __used				__attribute__((__used__))
+#define __must_check			__attribute__((warn_unused_result))
+#define __compiler_offsetof(a, b)	__builtin_offsetof(a, b)
+
+/* Mark functions as cold. gcc will assume any path leading to a call
+   to them will be unlikely.  This means a lot of manual unlikely()s
+   are unnecessary now for any paths leading to the usual suspects
+   like BUG(), printk(), panic() etc. [but let's keep them for now for
+   older compilers]
+
+   Early snapshots of gcc 4.3 don't support this and we can't detect this
+   in the preprocessor, but we can live with this because they're unreleased.
+   Maketime probing would be overkill here.
+
+   gcc also has a __attribute__((__hot__)) to move hot functions into
+   a special section, but I don't see any sense in this right now in
+   the kernel context */
+#define __cold			__attribute__((__cold__))
+
+#define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
+
+#ifndef __CHECKER__
+# define __compiletime_warning(message) __attribute__((warning(message)))
+# define __compiletime_error(message) __attribute__((error(message)))
+#endif /* __CHECKER__ */
+
+/*
+ * Mark a position in code as unreachable.  This can be used to
+ * suppress control flow warnings after asm blocks that transfer
+ * control elsewhere.
+ *
+ * Early snapshots of gcc 4.5 don't support this and we can't detect
+ * this in the preprocessor, but we can live with this because they're
+ * unreleased.  Really, we need to have autoconf for the kernel.
+ */
+#define unreachable() __builtin_unreachable()
+
+/* Mark a function definition as prohibited from being cloned. */
+#define __noclone	__attribute__((__noclone__))
+
+/*
+ * Tell the optimizer that something else uses this function or variable.
+ */
+#define __visible __attribute__((externally_visible))
+
+/*
+ * GCC 'asm goto' miscompiles certain code sequences:
+ *
+ *   http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58670
+ *
+ * Work it around via a compiler barrier quirk suggested by Jakub Jelinek.
+ *
+ * (asm goto is automatically volatile - the naming reflects this.)
+ */
+#define asm_volatile_goto(x...)	do { asm goto(x); asm (""); } while (0)
+
+#ifdef CONFIG_ARCH_USE_BUILTIN_BSWAP
+#define __HAVE_BUILTIN_BSWAP32__
+#define __HAVE_BUILTIN_BSWAP64__
+#define __HAVE_BUILTIN_BSWAP16__
+#endif /* CONFIG_ARCH_USE_BUILTIN_BSWAP */
+

device/linux-xiaomi-tissot/fix-include-msm_camera_i2c.patch

+diff --git a/drivers/media/platform/msm/camera_v2/sensor/msm_sensor.h b/drivers/media/platform/msm/camera_v2/sensor/msm_sensor.h
+index 5d57ec8c28ff..cc69fa018d65 100644
+--- a/drivers/media/platform/msm/camera_v2/sensor/msm_sensor.h
++++ b/drivers/media/platform/msm/camera_v2/sensor/msm_sensor.h
+@@ -31,9 +31,10 @@
+ #include <media/msm_cam_sensor.h>
+ #include <media/v4l2-subdev.h>
+ #include <media/v4l2-ioctl.h>
+-#include "msm_camera_i2c.h"
+-#include "msm_camera_dt_util.h"
+-#include "msm_sd.h"
++
++#include "io/msm_camera_i2c.h"
++#include "io/msm_camera_dt_util.h"
++#include "../msm_sd.h"
+ 
+ #define DEFINE_MSM_MUTEX(mutexname) \
+ 	static struct mutex mutexname = __MUTEX_INITIALIZER(mutexname)

device/linux-xiaomi-tissot/fix-include-msm_isp.patch

+diff --git a/include/trace/events/msm_cam.h b/include/trace/events/msm_cam.h
+index b52845407ef0..2cd283db8d32 100644
+--- a/include/trace/events/msm_cam.h
++++ b/include/trace/events/msm_cam.h
+@@ -16,7 +16,7 @@
+ #if !defined(_TRACE_MSM_VFE_H) || defined(TRACE_HEADER_MULTI_READ)
+ #define _TRACE_MSM_VFE_H
+ 
+-#include "msm_isp.h"
++#include "../../../drivers/media/platform/msm/camera_v2/isp/msm_isp.h"
+ #include <linux/types.h>
+ #include <linux/tracepoint.h>

device/linux-xiaomi-tissot/fix-rndis_ipa.patch

+diff --git a/drivers/net/ethernet/msm/Makefile b/drivers/net/ethernet/msm/Makefile
+index 5bf934e82fce..6d252a523be3 100644
+--- a/drivers/net/ethernet/msm/Makefile
++++ b/drivers/net/ethernet/msm/Makefile
+@@ -2,6 +2,8 @@
+ # Makefile for the msm networking support.
+ #
+ 
++CFLAGS_rndis_ipa.o := -I$(src)
++
+ obj-$(CONFIG_MSM_RMNET_MHI) += msm_rmnet_mhi.o
+ obj-$(CONFIG_ECM_IPA) += ecm_ipa.o
+ obj-$(CONFIG_RNDIS_IPA) += rndis_ipa.o
+diff --git a/drivers/platform/msm/ipa/ipa_v2/Makefile b/drivers/platform/msm/ipa/ipa_v2/Makefile
+index 69b8a4c94461..8bb29f9774f6 100644
+--- a/drivers/platform/msm/ipa/ipa_v2/Makefile
++++ b/drivers/platform/msm/ipa/ipa_v2/Makefile
+@@ -1,3 +1,4 @@
++CFLAGS_ipa.o := -I$(src)
+ obj-$(CONFIG_IPA) += ipat.o
+ ipat-y := ipa.o ipa_debugfs.o ipa_hdr.o ipa_flt.o ipa_rt.o ipa_dp.o ipa_client.o \
+ 	ipa_utils.o ipa_nat.o ipa_intf.o teth_bridge.o ipa_interrupts.o \
+diff --git a/drivers/platform/msm/ipa/ipa_v3/Makefile b/drivers/platform/msm/ipa/ipa_v3/Makefile
+index a4faaea715a8..9862cad0d43f 100644
+--- a/drivers/platform/msm/ipa/ipa_v3/Makefile
++++ b/drivers/platform/msm/ipa/ipa_v3/Makefile
+@@ -6,3 +6,5 @@ ipat-y := ipa.o ipa_debugfs.o ipa_hdr.o ipa_flt.o ipa_rt.o ipa_dp.o ipa_client.o
+ 	ipa_uc.o ipa_uc_wdi.o ipa_dma.o ipa_uc_mhi.o ipa_mhi.o ipa_uc_ntn.o
+ 
+ obj-$(CONFIG_RMNET_IPA3) += rmnet_ipa.o ipa_qmi_service_v01.o ipa_qmi_service.o rmnet_ipa_fd_ioctl.o
++
++CFLAGS_ipa.o := -I$(src)

device/linux-xiaomi-tissot/fix_msm_dba.patch

+diff --git a/drivers/video/msm/msm_dba/msm_dba.c b/drivers/video/msm/msm_dba/msm_dba.c
+index cc6512a..eb073a7 100644
+--- a/drivers/video/msm/msm_dba/msm_dba.c
++++ b/drivers/video/msm/msm_dba/msm_dba.c
+@@ -22,7 +22,7 @@
+ #include <linux/err.h>
+ 
+ #include <video/msm_dba.h>
+-#include <msm_dba_internal.h>
++#include "msm_dba_internal.h"
+ 
+ static DEFINE_MUTEX(register_mutex);
+ 

device/linux-xiaomi-tissot/fix_u_f_header.patch

+diff --git a/drivers/usb/gadget/function/u_f.h b/drivers/usb/gadget/function/u_f.h
+new file mode 100644
+index 0000000..1d5f0eb
+--- /dev/null
++++ b/drivers/usb/gadget/function/u_f.h
+@@ -0,0 +1,52 @@
++/*
++ * u_f.h
++ *
++ * Utility definitions for USB functions
++ *
++ * Copyright (c) 2013 Samsung Electronics Co., Ltd.
++ *		http://www.samsung.com
++ *
++ * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ */
++
++#ifndef __U_F_H__
++#define __U_F_H__
++
++/* Variable Length Array Macros **********************************************/
++#define vla_group(groupname) size_t groupname##__next = 0
++#define vla_group_size(groupname) groupname##__next
++
++#define vla_item(groupname, type, name, n) \
++	size_t groupname##_##name##__offset = ({			       \
++		size_t align_mask = __alignof__(type) - 1;		       \
++		size_t offset = (groupname##__next + align_mask) & ~align_mask;\
++		size_t size = (n) * sizeof(type);			       \
++		groupname##__next = offset + size;			       \
++		offset;							       \
++	})
++
++#define vla_item_with_sz(groupname, type, name, n) \
++	size_t groupname##_##name##__sz = (n) * sizeof(type);		       \
++	size_t groupname##_##name##__offset = ({			       \
++		size_t align_mask = __alignof__(type) - 1;		       \
++		size_t offset = (groupname##__next + align_mask) & ~align_mask;\
++		size_t size = groupname##_##name##__sz;			       \
++		groupname##__next = offset + size;			       \
++		offset;							       \
++	})
++
++#define vla_ptr(ptr, groupname, name) \
++	((void *) ((char *)ptr + groupname##_##name##__offset))
++
++struct usb_ep;
++struct usb_request;
++
++struct usb_request *alloc_ep_req(struct usb_ep *ep, int len, int default_len);
++
++#endif /* __U_F_H__ */
++
++

device/linux-xiaomi-tissot/init-ignore-dm-if-skip_initramfs.patch

+From 88d497212226cd63501e79e5031c6fca843e46a1 Mon Sep 17 00:00:00 2001
+From: Ion Agorria <ion@agorria.com>
+Date: Sat, 19 Jan 2019 12:07:10 +0100
+Subject: [PATCH] Cancel dm-setup if skip_initramfs is not present
+
+dm parameter might interfere on linux booting
+so we only use it when not doing a normal boot.
+---
+ init/do_mounts_dm.c | 13 +++++++++++++
+ 1 file changed, 13 insertions(+)
+
+diff --git a/init/do_mounts_dm.c b/init/do_mounts_dm.c
+index ecda58df9a19..53cda0b0317b 100644
+--- a/init/do_mounts_dm.c
++++ b/init/do_mounts_dm.c
+@@ -272,6 +272,15 @@ parse_fail:
+ 	return 1;
+ }
+ 
++static int __initdata skip_initramfs;
++static int __init skip_initramfs_param(char *str)
++{
++        if (*str) return 0;
++        skip_initramfs = 1;
++        return 0;
++}
++__setup("skip_initramfs", skip_initramfs_param);
++
+ /*
+  * Parse the command-line parameters given our kernel, but do not
+  * actually try to invoke the DM device now; that is handled by
+@@ -283,6 +292,10 @@ parse_fail:
+ 
+ static int __init dm_setup(char *str)
+ {
++	if (skip_initramfs) {
++		printk(KERN_INFO "dm: skip_initramfs present, ignoring dm setup\n");
++		return 1;
++	}
+ 	dm_setup_args_init();
+ 
+ 	str = dm_setup_parse_device_args(str);
+-- 
+2.19.2
+

device/linux-xiaomi-tissot/init-reverse-skip_initramfs.patch

+From 76e12feb81d1b1ccbb7c58b16e040ca6c59f7ace Mon Sep 17 00:00:00 2001
+From: Ion Agorria <ion@agorria.com>
+Date: Sat, 19 Jan 2019 12:10:23 +0100
+Subject: [PATCH] Reverse skip_initramfs to use it by default.
+
+This way it's possible to boot with initram by default.
+Initramfs is skip in this device to boot android unless
+recovery key is pressed.
+---
+ init/initramfs.c | 4 +++-
+ 1 file changed, 3 insertions(+), 1 deletion(-)
+
+diff --git a/init/initramfs.c b/init/initramfs.c
+index d39079e690fa..41fb5db74138 100644
+--- a/init/initramfs.c
++++ b/init/initramfs.c
+@@ -621,8 +621,10 @@ static int __init populate_rootfs(void)
+ {
+ 	char *err;
+ 
+-	if (do_skip_initramfs)
++	if (!do_skip_initramfs) {
++		printk(KERN_INFO "Skipping initramfs...\n");
+ 		return default_rootfs();
++	}
+ 
+ 	err = unpack_to_rootfs(__initramfs_start, __initramfs_size);
+ 	if (err)
+-- 
+2.19.2
+