oneplus-billie2: new device (OnePlus Nord N100)

So far the debug-shell in initfs works. The device uses dynamic
partitions, so that has to be figured out to get a proper rootfs.

One thing to look out for is that mount_subpartitions task in initfs
hangs, so pmos_boot=sth was added to kernel cmdline to skip it. This is
also related to dynamic partitions, anyway.

device/testing/device-oneplus-billie2/APKBUILD

+# Reference: <https://postmarketos.org/devicepkg>
+pkgname=device-oneplus-billie2
+pkgdesc="OnePlus Nord N100"
+pkgver=0.1
+pkgrel=0
+url="https://postmarketos.org"
+license="MIT"
+arch="aarch64"
+options="!check !archcheck"
+depends="postmarketos-base linux-oneplus-billie2 mkbootimg"
+makedepends="devicepkg-dev"
+source="deviceinfo"
+
+build() {
+	devicepkg_build $startdir $pkgname
+}
+
+package() {
+	devicepkg_package $startdir $pkgname
+}
+
+sha512sums="ff8ad6324809de35a146bd3186ba5c607a56bb6bf2c279987a958afdcda7899a640fe1147b7faf242ad18f3d5af368c43cc4ece5847912f9f8cd3d2daf1e6467  deviceinfo"

device/testing/device-oneplus-billie2/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="OnePlus Nord N100"
+deviceinfo_manufacturer="OnePlus"
+deviceinfo_codename="oneplus-billie2"
+deviceinfo_year="2020"
+deviceinfo_dtb="bengal-qrd"
+deviceinfo_modules_initfs=""
+deviceinfo_arch="aarch64"
+
+# Device related
+deviceinfo_chassis="handset"
+deviceinfo_keyboard="false"
+deviceinfo_external_storage="true"
+deviceinfo_screen_width="720"
+deviceinfo_screen_height="1600"
+deviceinfo_no_framebuffer="true"
+
+# Bootloader related
+deviceinfo_flash_method="fastboot"
+deviceinfo_kernel_cmdline="androidboot.hardware=qcom androidboot.console=ttyMSM0 androidboot.memcg=1 lpm_levels.sleep_disabled=1 video=vfb:640x400,bpp=32,memsize=3072000 msm_rtb.filter=0x237 service_locator.enable=1 swiotlb=2048 loop.max_part=7 buildvariant=user pmos_boot=dont_mount_subpartitions"
+deviceinfo_generate_bootimg="true"
+deviceinfo_append_dtb="true"
+deviceinfo_bootimg_qcdt="false"
+deviceinfo_bootimg_mtk_mkimage="false"
+deviceinfo_bootimg_dtb_second="false"
+deviceinfo_flash_offset_base="0x00000000"
+deviceinfo_flash_offset_kernel="0x00008000"
+deviceinfo_flash_offset_ramdisk="0x01000000"
+deviceinfo_flash_offset_second="0x00f00000"
+deviceinfo_flash_offset_tags="0x00000100"
+deviceinfo_flash_pagesize="4096"
+deviceinfo_flash_fastboot_partition_vbmeta="vbmeta"

device/testing/linux-oneplus-billie2/0001-Fix-function-declarations.patch

+From 857d33abc880163966fcbbfc05da69bd681ea161 Mon Sep 17 00:00:00 2001
+From: Iskren Chernev <me@iskren.info>
+Date: Thu, 18 Feb 2021 14:59:40 +0200
+Subject: [PATCH 1/6] Fix function declarations
+
+- Functions without args, should be declared f(void) [for clang]
+- Add missing return type [for gcc]
+- Add static to a few places [for gcc]
+
+Signed-off-by: Iskren Chernev <me@iskren.info>
+---
+ drivers/oneplus/coretech/control_center/control_center.c  | 2 +-
+ drivers/oneplus/coretech/memplus/core/memplus_core.c      | 4 ++--
+ drivers/power/oneplus/charger_ic/oneplus_battery_pmi632.c | 2 +-
+ 3 files changed, 4 insertions(+), 4 deletions(-)
+
+diff --git a/drivers/oneplus/coretech/control_center/control_center.c b/drivers/oneplus/coretech/control_center/control_center.c
+index 1d9c22cea1ea4..9d49af5d2e278 100644
+--- a/drivers/oneplus/coretech/control_center/control_center.c
++++ b/drivers/oneplus/coretech/control_center/control_center.c
+@@ -295,7 +295,7 @@ static struct list_head cc_pending_list;
+ static DEFINE_SPINLOCK(cc_async_lock);
+ static struct workqueue_struct *cc_wq;
+ 
+-extern cc_cal_next_freq_with_extra_util(
++extern unsigned cc_cal_next_freq_with_extra_util(
+ 	struct cpufreq_policy *pol, unsigned int next_freq);
+ extern void clk_get_ddr_freq(u64* val);
+ static void cc_queue_rq(struct cc_command *cc);
+diff --git a/drivers/oneplus/coretech/memplus/core/memplus_core.c b/drivers/oneplus/coretech/memplus/core/memplus_core.c
+index 1f351cacca2f1..9bd0d155587b6 100755
+--- a/drivers/oneplus/coretech/memplus/core/memplus_core.c
++++ b/drivers/oneplus/coretech/memplus/core/memplus_core.c
+@@ -128,11 +128,11 @@ static inline bool current_is_gcd(void)
+ 	return current == gc_tsk;
+ }
+ 
+-bool ctech_current_is_swapind() {
++static bool ctech_current_is_swapind(void) {
+ 	return current == swapind_tsk;
+ }
+ 
+-bool ctech_memplus_check_isolate_page(struct page*page)
++static bool ctech_memplus_check_isolate_page(struct page*page)
+ {
+ 	return (memplus_enabled() && (!PageSwapCache(page) || PageWillneed(page)));
+ }
+diff --git a/drivers/power/oneplus/charger_ic/oneplus_battery_pmi632.c b/drivers/power/oneplus/charger_ic/oneplus_battery_pmi632.c
+index 4ccd81bd8aa38..6a00d21ad76e4 100755
+--- a/drivers/power/oneplus/charger_ic/oneplus_battery_pmi632.c
++++ b/drivers/power/oneplus/charger_ic/oneplus_battery_pmi632.c
+@@ -14099,7 +14099,7 @@ static int oneplus_chg_get_charger_subtype(void)
+ 	return CHARGER_SUBTYPE_DEFAULT;
+ }
+ 
+-static int oneplus_set_qc_config()
++static int oneplus_set_qc_config(void)
+ {
+ 	return 0;
+ }
+-- 
+2.30.1
+

device/testing/linux-oneplus-billie2/0002-Fix-dangerous-relocation.patch

+From 8ad6ace96fbe7aba0846872cb18120b76a505bf5 Mon Sep 17 00:00:00 2001
+From: Iskren Chernev <me@iskren.info>
+Date: Thu, 18 Feb 2021 15:05:50 +0200
+Subject: [PATCH 2/6] Fix dangerous relocation
+
+Without this fix the linker complains:
+
+  WARNING: EXPORT symbol "gsi_write_channel_scratch" [vmlinux] version generation failed, symbol will not be versioned.
+  aarch64-linux-gnu-ld: warning: -z norelro ignored
+  aarch64-linux-gnu-ld: drivers/platform/msm/gsi/gsi.o: relocation R_AARCH64_ABS32 against `__crc_gsi_write_channel_scratch' can not be used when making a shared object
+  drivers/platform/msm/gsi/gsi.o:(.data+0x0): dangerous relocation: unsupported relocation
+  drivers/platform/msm/gsi/gsi.o:(.data+0x28): dangerous relocation: unsupported relocation
+  drivers/platform/msm/gsi/gsi.o:(.data+0x50): dangerous relocation: unsupported relocation
+  make[1]: *** [/home/iskren/src/pmos/android_kernel_samsung_msm8974/Makefile:1124: vmlinux] Error 1
+
+The problem is actually that genksyms doesn't understand __packed in
+function return type.
+
+Signed-off-by: Iskren Chernev <me@iskren.info>
+---
+ drivers/platform/msm/gsi/gsi.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/drivers/platform/msm/gsi/gsi.c b/drivers/platform/msm/gsi/gsi.c
+index 391ff6f0325c0..793d253442f36 100644
+--- a/drivers/platform/msm/gsi/gsi.c
++++ b/drivers/platform/msm/gsi/gsi.c
+@@ -2620,7 +2620,7 @@ static void __gsi_read_channel_scratch(unsigned long chan_hdl,
+ 			gsi_ctx->per.ee));
+ }
+ 
+-static union __packed gsi_channel_scratch __gsi_update_mhi_channel_scratch(
++static union gsi_channel_scratch __gsi_update_mhi_channel_scratch(
+ 	unsigned long chan_hdl, struct __packed gsi_mhi_channel_scratch mscr)
+ {
+ 	union __packed gsi_channel_scratch scr;
+-- 
+2.30.1
+

device/testing/linux-oneplus-billie2/0003-Remove-gcc-python-wrapper.patch

+From 966d3ac2409b59f431e1397f5ab8e9ee74ba5ae0 Mon Sep 17 00:00:00 2001
+From: Iskren Chernev <me@iskren.info>
+Date: Sat, 20 Feb 2021 00:49:45 +0200
+Subject: [PATCH 3/6] Remove gcc python wrapper
+
+---
+ Makefile | 6 +-----
+ 1 file changed, 1 insertion(+), 5 deletions(-)
+
+diff --git a/Makefile b/Makefile
+index 15a18b3cd15f6..e6a72c1a84fe9 100644
+--- a/Makefile
++++ b/Makefile
+@@ -370,7 +370,7 @@ KBUILD_HOSTLDLIBS   := $(HOST_LFS_LIBS) $(HOSTLDLIBS)
+ # Make variables (CC, etc...)
+ AS		= $(CROSS_COMPILE)as
+ LD		= $(CROSS_COMPILE)ld
+-REAL_CC		= $(CROSS_COMPILE)gcc
++CC		= $(CROSS_COMPILE)gcc
+ CPP		= $(CC) -E
+ AR		= $(CROSS_COMPILE)ar
+ NM		= $(CROSS_COMPILE)nm
+@@ -389,10 +389,6 @@ PYTHON2		= python2
+ PYTHON3		= python3
+ CHECK		= sparse
+ 
+-# Use the wrapper for the compiler.  This wrapper scans for new
+-# warnings and causes the build to stop upon encountering them
+-CC		= $(PYTHON) $(srctree)/scripts/gcc-wrapper.py $(REAL_CC)
+-
+ CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
+ 		  -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF)
+ NOSTDINC_FLAGS  =
+-- 
+2.30.1
+

device/testing/linux-oneplus-billie2/0004-Fix-reading-after-array-end.patch

+From f994379fff7e7208559d3cdb195b6751155f5d79 Mon Sep 17 00:00:00 2001
+From: Iskren Chernev <me@iskren.info>
+Date: Mon, 22 Feb 2021 19:22:17 +0200
+Subject: [PATCH 4/6] Fix reading after array end
+
+Signed-off-by: Iskren Chernev <me@iskren.info>
+---
+ .../oneplus_touchscreen/ilitek/ilitek9882n/ili9882n_qcom.c      | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/drivers/input/touchscreen/oneplus_touchscreen/ilitek/ilitek9882n/ili9882n_qcom.c b/drivers/input/touchscreen/oneplus_touchscreen/ilitek/ilitek9882n/ili9882n_qcom.c
+index 31d1eee8f1f86..7c6054e60bfaf 100755
+--- a/drivers/input/touchscreen/oneplus_touchscreen/ilitek/ilitek9882n/ili9882n_qcom.c
++++ b/drivers/input/touchscreen/oneplus_touchscreen/ilitek/ilitek9882n/ili9882n_qcom.c
+@@ -258,10 +258,10 @@ static int ili_spi_pll_clk_wakeup(void)
+ 	wdata[1] = wlen >> 8;
+ 	wdata[2] = wlen & 0xff;
+ 	index = 3;
+-	wlen += index;
+ 
+ 	ipio_memcpy(&wdata[index], wakeup, wlen, wlen);
+ 
++	wlen += index;
+ 	ILI_INFO("Write dummy to wake up spi pll clk\n");
+ 	if (ilits->spi_write_then_read(ilits->spi, wdata, wlen, NULL, 0) < 0) {
+ 		ILI_INFO("spi slave write error\n");
+-- 
+2.30.1
+

device/testing/linux-oneplus-billie2/0005-Remove-inline-from-external-functions.patch

+From c9b57d68eb48b1f9626e82d45313466b4b3e4a15 Mon Sep 17 00:00:00 2001
+From: Iskren Chernev <me@iskren.info>
+Date: Mon, 22 Feb 2021 19:23:15 +0200
+Subject: [PATCH 5/6] Remove inline from external functions
+
+Signed-off-by: Iskren Chernev <me@iskren.info>
+---
+ fs/f2fs/f2fs.h    | 4 ++--
+ fs/f2fs/segment.c | 4 ++--
+ 2 files changed, 4 insertions(+), 4 deletions(-)
+
+diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
+index 76f02a621ed95..016be262190d2 100644
+--- a/fs/f2fs/f2fs.h
++++ b/fs/f2fs/f2fs.h
+@@ -3802,8 +3802,8 @@ static inline bool is_journalled_quota(struct f2fs_sb_info *sbi)
+ 
+ extern int f2fs_odiscard_enable;
+ 
+-extern inline void wake_up_odiscard_of2fs(struct f2fs_sb_info *sbi);
+-extern inline void wake_up_otrim_of2fs(struct f2fs_sb_info *sbi);
++extern void wake_up_odiscard_of2fs(struct f2fs_sb_info *sbi);
++extern void wake_up_otrim_of2fs(struct f2fs_sb_info *sbi);
+ 
+ enum {
+ 	F2FS_TRIM_START,
+diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
+index bbd60419054f5..f8c95e94a58c1 100644
+--- a/fs/f2fs/segment.c
++++ b/fs/f2fs/segment.c
+@@ -5167,7 +5167,7 @@ static int select_discard_type_of2fs(struct f2fs_sb_info *sbi, int expect_discar
+ 	return DPOLICY_BG;
+ }
+ 
+-inline void wake_up_odiscard_of2fs(struct f2fs_sb_info *sbi)
++void wake_up_odiscard_of2fs(struct f2fs_sb_info *sbi)
+ {
+ 	struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
+ 
+@@ -5178,7 +5178,7 @@ inline void wake_up_odiscard_of2fs(struct f2fs_sb_info *sbi)
+ }
+ 
+ 
+-inline void wake_up_otrim_of2fs(struct f2fs_sb_info *sbi)
++void wake_up_otrim_of2fs(struct f2fs_sb_info *sbi)
+ {
+ 	struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
+ 
+-- 
+2.30.1
+

device/testing/linux-oneplus-billie2/0006-Suppress-error-about-static-buffer-overflow.patch

+From 672029f8923fd77543044cfcf680b2c0adc226dd Mon Sep 17 00:00:00 2001
+From: Iskren Chernev <me@iskren.info>
+Date: Mon, 22 Feb 2021 19:24:04 +0200
+Subject: [PATCH 6/6] Suppress error about static buffer overflow
+
+There is a check just before the function call to ensure there is enough
+space.
+
+Signed-off-by: Iskren Chernev <me@iskren.info>
+---
+ drivers/platform/msm/ipa/ipa_v3/ipa_hw_stats.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/drivers/platform/msm/ipa/ipa_v3/ipa_hw_stats.c b/drivers/platform/msm/ipa/ipa_v3/ipa_hw_stats.c
+index 1b900a27173be..d1e40689709ad 100644
+--- a/drivers/platform/msm/ipa/ipa_v3/ipa_hw_stats.c
++++ b/drivers/platform/msm/ipa/ipa_v3/ipa_hw_stats.c
+@@ -2253,7 +2253,7 @@ static ssize_t ipa_debugfs_enable_disable_drop_stats(struct file *file,
+ 		goto bail;
+ 	}
+ 
+-	missing = copy_from_user(dbg_buff, ubuf, count);
++	missing = _copy_from_user(dbg_buff, ubuf, count);
+ 	if (missing) {
+ 		ret = -EFAULT;
+ 		goto bail;
+-- 
+2.30.1
+

device/testing/linux-oneplus-billie2/0007-linux4.17-gcc10-extern_YYLOC_global_declaration.patch

+../../../device/.shared-patches/linux/linux4.17-gcc10-extern_YYLOC_global_declaration.patch
\ No newline at end of file

device/testing/linux-oneplus-billie2/APKBUILD

+# Reference: <https://postmarketos.org/vendorkernel>
+# Kernel config based on: arch/arm64/configs/vendor/bengal_defconfig
+
+pkgname=linux-oneplus-billie2
+pkgver=4.19.95
+pkgrel=0
+pkgdesc="OnePlus Nord N100 kernel fork"
+arch="aarch64"
+_carch="arm64"
+_flavor="oneplus-billie2"
+url="https://kernel.org"
+license="GPL-2.0-only"
+options="!strip !check !tracedeps pmb:cross-native"
+makedepends="bash bc bison devicepkg-dev flex openssl-dev perl linux-headers"
+
+# Source
+_repository="android_kernel_oneplus_sm4250"
+_commit="6db26f433f9a8722d0858562804da13f3090bfd7"
+_config="config-$_flavor.$arch"
+source="
+	$pkgname-$_commit.tar.gz::https://github.com/OnePlusOSS/$_repository/archive/$_commit.tar.gz
+	$_config
+	0001-Fix-function-declarations.patch
+	0002-Fix-dangerous-relocation.patch
+	0003-Remove-gcc-python-wrapper.patch
+	0004-Fix-reading-after-array-end.patch
+	0005-Remove-inline-from-external-functions.patch
+	0006-Suppress-error-about-static-buffer-overflow.patch
+	0007-linux4.17-gcc10-extern_YYLOC_global_declaration.patch
+"
+builddir="$srcdir/$_repository-$_commit"
+_outdir="out"
+
+prepare() {
+	default_prepare
+
+	mkdir -p "$builddir/$_outdir"
+	cp "$srcdir/$_config" "$builddir"/"$_outdir"/.config
+}
+
+build() {
+	unset LDFLAGS
+	make O="$_outdir" ARCH="$_carch" CC="${CC:-gcc}" \
+		KBUILD_BUILD_VERSION="$((pkgrel + 1 ))-postmarketOS" \
+		CONFIG_SECTION_MISMATCH_WARN_ONLY=y
+}
+
+package() {
+	KERNEL_IMAGE_NAME=Image.gz downstreamkernel_package \
+		"$builddir" "$pkgdir" "$_carch" "$_flavor" "$_outdir"
+
+	mkdir -p "$pkgdir/usr/share/dtb"
+	install -Dm644 "$_outdir/arch/arm64/boot/dts/vendor/20882/bengal-qrd.dtb" \
+		"$pkgdir/usr/share/dtb"
+
+	make O="$_outdir" \
+		ARCH="$_carch" \
+		INSTALL_MOD_STRIP=1 \
+		INSTALL_MOD_PATH="$pkgdir" \
+		modules_install
+}
+
+sha512sums="9995a00adeceb30d4a64421e17c85a8349fe674b8a20dc2462cf21af867197f23e62326f0948ca12b52c7cb954388a3767122cea85eb033ff9525e15aa5af9b5  linux-oneplus-billie2-6db26f433f9a8722d0858562804da13f3090bfd7.tar.gz
+53d5c7e98bcf0621f15e249393a610f685c9c9b20086dd1d463ce3d6c85df9bb7bed229ba65b80f0b28951ec174981613a48fad0c9d07228b0ae861eac8b98f7  config-oneplus-billie2.aarch64
+c6739758f857f3da23702e005b1ed11e30fa28981a4307fa8d5d7419931400c419c3bd0c2dcfb2c0aff8972e5a19125be5074597e094195315d8a760e373802a  0001-Fix-function-declarations.patch
+39007dd285b502633c7bbf398acd6841a14fb6f5e0a3ad8570d31be77763b537b2352401701d67c53d36ddbf4068ee32446bf3b4ef9aa20c39f052ca491d2be4  0002-Fix-dangerous-relocation.patch
+359f619b7aac5bab061311f0806018ed04ce96a2233584a507b14c50ce616dfbc1681dd465ca3f0182165a6fc6c7b87435615bd1bd93efe174b95deba071f5fc  0003-Remove-gcc-python-wrapper.patch
+f8727c9c3b6c42ac921bd31fd05dc507e02a53c1c158fe7b67e75db482067b77ab9e2ffe33088c047a699b79642d6be1722d854cdf74cea6db5b46f586315bd0  0004-Fix-reading-after-array-end.patch
+aba7ae12986a2df81c6993f369390c6b3f5586fa70ab747e03d59aaf08cb79482a44eab723aed4469e98cadea0f70912f4e67caaf67cc279e1dc85e485b93a0f  0005-Remove-inline-from-external-functions.patch
+3835f7e4fca12aaba82fe21cc9632f0e569a8c4405231d137aea4f2640190d919e1a44612082decfbaaa41faa3c6a3ff0442086afb81d59c984a5697fdb9cac9  0006-Suppress-error-about-static-buffer-overflow.patch
+27827877040007fc1c4c719f7e2e19e5c272d44972415cfc53feba0313d87e4074f8204bdb13cbc5fe21ea61bf595314b68f10c081e7b7bac3c888b60f008acf  0007-linux4.17-gcc10-extern_YYLOC_global_declaration.patch"