Update for 2021.07

Signed-off-by: David Abdurachmanov <[email protected]>

README.md

@@ -34,7 +34,7 @@ This needs to be done every time you want a clean setup based on the latest laye
 
 ```bash
 mkdir riscv-sifive && cd riscv-sifive
-repo init -u git://github.com/sifive/meta-sifive -b 2021.06 -m tools/manifests/sifive.xml
+repo init -u git://github.com/sifive/meta-sifive -b 2021.07 -m tools/manifests/sifive.xml
 repo sync
 ```
 
@@ -139,7 +139,6 @@ Building disk image takes a single command which may take anything from 30 minut
 ```bash
 MACHINE=qemuriscv64 bitbake demo-coreip-cli
 MACHINE=freedom-u540 bitbake demo-coreip-cli
-MACHINE=freedom-u540 bitbake demo-coreip-xfce4
 MACHINE=unmatched bitbake demo-coreip-xfce4
 ```
 

ReleaseNotes/2021.07.md

@@ -0,0 +1,28 @@
+# Release Notes for 2021.07.00
+
+This release includes major changes compared previous Freedom U SDK (FUSDK). The main changes include:
+
+- Layers (`openembedded-core`, `meta-openemedded`, `meta-riscv`, `meta-clang`,  `meta-tensorflow-lite`) were updated to their latest revisions.
+- `stress-ng` was updated to 0.12.12.
+- `rng-tools` was rebased to 6.13.
+- `nfs-utils` was rebased to 2.5.4.
+- `man-pages` was rebased to 5.12.
+- `linux-mainline_5.12` was rebased to v5.12.18.
+- `u-boot` was rebased to v2021.07 (major change):
+    + Upstream U-Boot v2021.07 release is the first one to provide the initial (not full) Unmatched support.
+- Added missing `unmatched-udev-rules` and `unmatched-systemd-units` packages into `demo-coreip-cli` disk image.
+- Changed `UBOOT_MACHINE` for Unmatched machine to `sifive_unmatched_defconfig` (the new upstream name).
+- Changed `UBOOT_MACHINE` for Unleashed machine to `sifive_unleashed_defconfig` (the new upstream name).
+- `qemu-native`, `qemu-system-native`, `qemu` gained `pmem` PACKAGECONFIG option to solve compilation issues on some host system configurations.
+- `gdb` now includes backport of [symtab/27999](https://sourceware.org/bugzilla/show_bug.cgi?id=27999) bug fix for riscv64.
+- `udev-extraconf` was added back.
+
+
+## Known Issues
+
+1. Newer OE/Yocto buildtools could cause build issues for `nspr-native` package. Use `-r yocto-3.2_M2 -t 20200729` as described in README file if you are using OE/Yocto buildtools. See Yocto bug [#14112](https://bugzilla.yoctoproject.org/show_bug.cgi?id=14112)
+2. We have found an issue with SanDisk "A2" microSD cards and thus do not recommend them.
+3. If the desktop is unresponsive/frozen (i.e. the keyboard doesn't work or/and the mouse doesn't work, the clock is not updating, etc.) try `systemctl restart display-manager` from the serial console.
+4. If the keyboard or/and mouse is not responsive/frozen check if the input device is available under `libinput list-devices` and if events are registered by `libinput debug-events` in the console. If events are registered try the command from #6 above otherwise manually unplug and plug the keyboard or/and mouse.
+5. If your desktop is very slow check Mesa OpenGL rendered (`glxinfo | grep OpenGL`). If it is `OpenGL renderer string: llvmpipe` restart the system. In rare cases Mesa might fallback to `llvmpipe`, but restart usually resolved the issue.
+6. Restart is not implemented in software for HiFive Unmatched.