Add LG G Watch (dory) support (#595)

* Add LG G Watch (dory) support

* Use github.com mirror instead of googlesource.com to have fixed checksum

* Fix kernel compilation and remove unnecessary initfs-hook for framebuffer settings

device/device-lg-dory/90-touchscreen-dev.rules

+# udev rules file
+# All device names can be read from weston's logfile (/tmp/weston.log in postmarketOS)
+
+# Touchscreen detection
+SUBSYSTEM=="input", ATTRS{name}=="synaptics_rmi4_i2c", \
+ENV{ID_INPUT}="1", ENV{ID_INPUT_TOUCHSCREEN}="1"
+

device/device-lg-dory/APKBUILD

+pkgname=device-lg-dory
+pkgver=1
+pkgrel=0
+pkgdesc="LG G Watch"
+url="https://github.com/postmarketOS"
+arch="noarch"
+license="MIT"
+depends="linux-lg-dory mkbootimg msm-fb-refresher"
+makedepends=""
+install=""
+subpackages=""
+source="deviceinfo 90-touchscreen-dev.rules"
+options="!check"
+
+package() {
+	install -D -m644 "$srcdir"/deviceinfo \
+		"$pkgdir"/etc/deviceinfo
+	install -D -m644 "$srcdir"/90-touchscreen-dev.rules \
+		"$pkgdir"/etc/udev/rules.d/90-touchscreen-dev.rules
+}
+
+sha512sums="68eedb9699db7e4abbcfa010271cac6b9b1b32bde170a7c3cfd598cfe51dc2c96837986175ddfb9c096521ca406f7b5c911afbafc41fb820c2d7333f34959b20  deviceinfo
+4bd58ba3633d926fe8d1b1869b01173b44c5a66c75e8cc9220decf0bd395e1c20c746adf8f5f6761d67752e4b307cb65957bfaa01a631e42bf0860bebffbf347  90-touchscreen-dev.rules"

device/device-lg-dory/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="G Watch"
+deviceinfo_manufacturer="LG"
+deviceinfo_date=""
+deviceinfo_nonfree="????"
+deviceinfo_dtb=""
+deviceinfo_modules_initfs=""
+deviceinfo_external_disk="false"
+deviceinfo_external_disk_install="false"
+deviceinfo_flash_methods="fastboot"
+deviceinfo_arch="armhf"
+deviceinfo_msm_refresher="true"
+
+# Device related
+deviceinfo_keyboard="false"
+deviceinfo_screen_width="280"
+deviceinfo_screen_height="280"
+
+# Fastboot related
+deviceinfo_generate_bootimg="true"
+deviceinfo_flash_offset_base="0x00000000"
+deviceinfo_flash_offset_kernel="0x00008000"
+deviceinfo_flash_offset_ramdisk="0x02000000"
+deviceinfo_flash_offset_second="0x00f00000"
+deviceinfo_flash_offset_tags="0x01e00000"
+deviceinfo_flash_pagesize="2048"
+
+deviceinfo_weston_core_modules="xwayland.so"

device/linux-lg-dory/00_fix_return_address.patch

+From aeea3592a13bf12861943e44fc48f1f270941f8d Mon Sep 17 00:00:00 2001
+From: Behan Webster <behanw@converseincode.com>
+Date: Wed, 24 Sep 2014 01:06:46 +0100
+Subject: [PATCH] ARM: 8158/1: LLVMLinux: use static inline in ARM ftrace.h
+
+With compilers which follow the C99 standard (like modern versions of gcc and
+clang), "extern inline" does the wrong thing (emits code for an externally
+linkable version of the inline function). In this case using static inline
+and removing the NULL version of return_address in return_address.c does
+the right thing.
+
+Signed-off-by: Behan Webster <behanw@converseincode.com>
+Reviewed-by: Mark Charlebois <charlebm@gmail.com>
+Acked-by: Steven Rostedt <rostedt@goodmis.org>
+Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
+---
+ arch/arm/include/asm/ftrace.h    | 2 +-
+ arch/arm/kernel/return_address.c | 5 -----
+ 2 files changed, 1 insertion(+), 6 deletions(-)
+
+diff --git a/arch/arm/include/asm/ftrace.h b/arch/arm/include/asm/ftrace.h
+index 39eb16b0066f2..bfe2a2f5a644e 100644
+--- a/arch/arm/include/asm/ftrace.h
++++ b/arch/arm/include/asm/ftrace.h
+@@ -45,7 +45,7 @@ void *return_address(unsigned int);
+ 
+ #else
+ 
+-extern inline void *return_address(unsigned int level)
++static inline void *return_address(unsigned int level)
+ {
+ 	return NULL;
+ }
+diff --git a/arch/arm/kernel/return_address.c b/arch/arm/kernel/return_address.c
+index fafedd86885dd..f6aa84d5b93c9 100644
+--- a/arch/arm/kernel/return_address.c
++++ b/arch/arm/kernel/return_address.c
+@@ -63,11 +63,6 @@ void *return_address(unsigned int level)
+ #warning "TODO: return_address should use unwind tables"
+ #endif
+ 
+-void *return_address(unsigned int level)
+-{
+-	return NULL;
+-}
+-
+ #endif /* if defined(CONFIG_FRAME_POINTER) && !defined(CONFIG_ARM_UNWIND) / else */
+ 
+ EXPORT_SYMBOL_GPL(return_address);

device/linux-lg-dory/01_avoid_rpmb_read_during_boot.patch

+diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
+index ed543c49..f6199747 100644
+--- a/drivers/mmc/card/block.c
++++ b/drivers/mmc/card/block.c
+@@ -1277,6 +1277,18 @@ static inline void mmc_blk_reset_success(struct mmc_blk_data *md, int type)
+ 	md->reset_done &= ~type;
+ }
+ 
++int mmc_access_rpmb(struct mmc_queue *mq)
++{
++	struct mmc_blk_data *md = mq->data;
++	/*
++	 * If this is a RPMB partition access, return ture
++	 */
++	if (md && md->part_type == EXT_CSD_PART_CONFIG_ACC_RPMB)
++		return true;
++
++	return false;
++}
++
+ static int mmc_blk_issue_discard_rq(struct mmc_queue *mq, struct request *req)
+ {
+ 	struct mmc_blk_data *md = mq->data;
+diff --git a/drivers/mmc/card/queue.c b/drivers/mmc/card/queue.c
+index e072f654..8dcff0eb 100644
+--- a/drivers/mmc/card/queue.c
++++ b/drivers/mmc/card/queue.c
+@@ -51,7 +51,7 @@ static int mmc_prep_request(struct request_queue *q, struct request *req)
+ 		return BLKPREP_KILL;
+ 	}
+ 
+-	if (mq && mmc_card_removed(mq->card))
++	if (mq && (mmc_card_removed(mq->card) || mmc_access_rpmb(mq)))
+ 		return BLKPREP_KILL;
+ 
+ 	req->cmd_flags |= REQ_DONTPREP;
+diff --git a/drivers/mmc/card/queue.h b/drivers/mmc/card/queue.h
+index d1fe01c1..f850c067 100644
+--- a/drivers/mmc/card/queue.h
++++ b/drivers/mmc/card/queue.h
+@@ -70,4 +70,6 @@ extern void mmc_queue_bounce_post(struct mmc_queue_req *);
+ 
+ extern void print_mmc_packing_stats(struct mmc_card *card);
+ 
++extern int mmc_access_rpmb(struct mmc_queue *);
++
+ #endif

device/linux-lg-dory/02_fix_mdss_fb_refresh_rate.patch

+diff --git a/drivers/video/msm/mdss/mdss_fb.c b/drivers/video/msm/mdss/mdss_fb.c
+index 60ac9cc..926e4a4 100644
+--- a/drivers/video/msm/mdss/mdss_fb.c
++++ b/drivers/video/msm/mdss/mdss_fb.c
+@@ -1921,7 +1921,7 @@ static int mdss_fb_register(struct msm_fb_data_type *mfd)
+ 	var->left_margin = panel_info->lcdc.h_back_porch;
+ 	var->right_margin = panel_info->lcdc.h_front_porch;
+ 	var->hsync_len = panel_info->lcdc.h_pulse_width;
+-	var->pixclock = panel_info->clk_rate / 1000;
++	var->pixclock = 1000000 / 60;
+ 
+ 	/*
+ 	 * Populate smem length here for uspace to get the

device/linux-lg-dory/03_fix_mdss_fb_memory_allocation.patch

+diff --git a/drivers/video/msm/mdss/mdss_fb.c b/drivers/video/msm/mdss/mdss_fb.c
+index 926e4a4..17e735f 100644
+--- a/drivers/video/msm/mdss/mdss_fb.c
++++ b/drivers/video/msm/mdss/mdss_fb.c
+@@ -2872,8 +2872,8 @@ static int mdss_fb_set_par(struct fb_info *info)
+ 	else
+ 		mfd->fbi->fix.line_length = var->xres * var->bits_per_pixel / 8;
+ 
+-	mfd->fbi->fix.smem_len = mfd->fbi->fix.line_length *
+-					mfd->fbi->var.yres_virtual;
++	/*mfd->fbi->fix.smem_len = mfd->fbi->fix.line_length *
++					mfd->fbi->var.yres_virtual;*/
+ 
+ 	if (mfd->panel_reconfig || (mfd->fb_imgType != old_imgType)) {
+ 		mdss_fb_blank_sub(FB_BLANK_POWERDOWN, info, mfd->op_enable);
+diff --git a/drivers/video/msm/mdss/mdss_mdp.c b/drivers/video/msm/mdss/mdss_mdp.c
+index 9e178d1..6b6044c 100644
+--- a/drivers/video/msm/mdss/mdss_mdp.c
++++ b/drivers/video/msm/mdss/mdss_mdp.c
+@@ -224,7 +224,7 @@ u32 mdss_mdp_fb_stride(u32 fb_index, u32 xres, int bpp)
+ 	   is writing directly to fb0, the framebuffer pitch
+ 	   also needs to be 32 pixel aligned */
+ 
+-	if (fb_index == 0)
++	if (fb_index == 1)
+ 		return ALIGN(xres, 32) * bpp;
+ 	else
+ 		return xres * bpp;

device/linux-lg-dory/APKBUILD

+# APKBUILD based on linux-vanilla aport. Changes:
+# - disabled module installation
+# - add !check !tracedeps
+# - package: just install zimage-dtb and kernel.release
+#
+# Kernel config based on: arch/arm/configs/dory_defconfig
+# Changes:
+# - apply patches to compile with gcc6
+# - enable devtmpfs (needed for udev -> touch support in weston)
+# - enabled CONFIG_VT (needed for weston to work)
+
+_vendor=lge
+_flavor=lg-dory
+_hash="6924014484d3406e3d2da384efc20e40e8a5ae80"
+_config="config-${_flavor}.armhf"
+
+pkgname=linux-${_flavor}
+pkgver=3.10.40
+case $pkgver in
+	*.*.*)  _kernver=${pkgver%.*};;
+	*.*) _kernver=$pkgver;;
+esac
+pkgrel=0
+arch="armhf"
+pkgdesc="Kernel for LG G Watch"
+url="https://android.googlesource.com/kernel/msm/+/android-msm-dory-3.10-marshmallow-mr1-wear-release"
+depends="postmarketos-mkinitfs"
+makedepends="perl sed installkernel bash gmp-dev bc linux-headers elfutils-dev"
+options="!strip !check !tracedeps"
+install=
+source="
+	$pkgname-$_hash.tar.gz::https://github.com/android/kernel_msm/archive/${_hash}.tar.gz
+	$_config
+	compiler-gcc6.h
+	00_fix_return_address.patch
+	01_avoid_rpmb_read_during_boot.patch
+	02_fix_mdss_fb_refresh_rate.patch
+	03_fix_mdss_fb_memory_allocation.patch
+"
+subpackages=""
+license="GPL2"
+
+_abi_release=${pkgver}
+_carch="arm"
+HOSTCC="${CC:-gcc}"
+HOSTCC="${HOSTCC#${CROSS_COMPILE}}"
+
+builddir="$srcdir/kernel_msm-${_hash}"
+
+prepare() {
+	default_prepare
+
+	# gcc6 support
+	cp -v "$srcdir/compiler-gcc6.h" "$builddir/include/linux/"
+
+	cp "$srcdir"/$_config "$builddir"/.config
+	make ARCH="$_carch" HOSTCC="$HOSTCC" silentoldconfig
+}
+
+# this is so we can do: 'abuild menuconfig' to reconfigure kernel
+menuconfig() {
+	cd "$builddir"
+	make ARCH="$_carch" menuconfig
+	cp .config "$startdir"/$_config
+}
+
+build() {
+	unset LDFLAGS
+	make ARCH="$_carch" CC="${CC:-gcc}" \
+		KBUILD_BUILD_VERSION="$((pkgrel + 1 ))-Alpine"
+}
+
+package() {
+	install -Dm644 "$builddir/arch/arm/boot/zImage-dtb" \
+		"$pkgdir/boot/vmlinuz-$_flavor"
+
+	install -D "$builddir/include/config/kernel.release" \
+		"$pkgdir/usr/share/kernel/$_flavor/kernel.release"
+}
+
+sha512sums="adc1e7852bebf3c11af87cfe9c994025e1415468be707664a25df33507d33de62125ab367dbc3f57ff84213ea479c2e8870d45603bc96df641b1bf853216201a  linux-lg-dory-6924014484d3406e3d2da384efc20e40e8a5ae80.tar.gz
+96c8ee4a206c69e794d976eab822ef0f827e52c082f59afad462f66f082f528e15a2b54841f5d67493b5a1d0d2b3ff1f69cc1dbb6c69d1b01cc4869a44963560  config-lg-dory.armhf
+d80980e9474c82ba0ef1a6903b434d8bd1b092c40367ba543e72d2c119301c8b2d05265740e4104ca1ac5d15f6c4aa49e8776cb44264a9a28dc551e0d1850dcc  compiler-gcc6.h
+ea1d3b5a234fa565e3c1a792de48f4fc4e6023d281d303c8e319c7ef28edc5739ab0e4dea0139a41f0a5c7d03e27921ccaa214fd0ac5c72245a094ce60128864  00_fix_return_address.patch
+760fdff79df31754ebed59839f34fc8c5a61750471614ac93a01b1e13b2535e7ca1f879c0cad3e83ad92946586c91679ba853eac4fe454d7e948317c84d81941  01_avoid_rpmb_read_during_boot.patch
+26b599d6b0c435d9e0b80f578c1cc0714d60f532a98efbbcb0e313f5c5dcd2c8619afa5776091d14ea65e268a1f128b378fe30ba1743e1428f3300b505a9861c  02_fix_mdss_fb_refresh_rate.patch
+5208c3f33099e22516e00ab90234784918157d0712a8a9cf81418a7ea1c136601cb54f83d490577f2cadb6ed94ac6c6f242e7b310fb5f09222de568e416c6731  03_fix_mdss_fb_memory_allocation.patch"

device/linux-lg-dory/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 */
+