Add command to build and flash kernel

.gitignore

@@ -4,3 +4,4 @@
 /debug/
 /tools/
 /.cache/
+/.repos/

dev/NOTES.md

@@ -0,0 +1,24 @@
+### postmarketOS
+
+The dma counter only increased when probing i2c7 (the not working one). Could be either that this i2c uses dma to transfer and it does not work or its a fault interrupt.
+
+```
+samsung-a715f:~$ cat /proc/interrupts | grep -i i2c
+137:         72          0          0          0          0          0          0          0     GICv3 633 Level     880000.i2c
+138:         72          0          0          0          0          0          0          0     GICv3 635 Level     888000.i2c
+141:          0          0          0          0          0          0          0          0     GICv3 386 Level     a84000.i2c
+142:        120          0          0          0          0          0          0          0     GICv3 388 Level     a8c000.i2c
+
+samsung-a715f:~$ cat /proc/interrupts | grep -i dma
+133:       1061          0          0          0          0          0          0          0     GICv3 311 Level     gpi-dma
+```
+
+### Android
+```
+a71:/ # cat /proc/interrupts | grep -i -e dma -e i2c
+ 18:       1141          0          0          0          0          0          0          0   PDC-GIC 311 Level     gpi_dmaa00000_gpii0
+114:        941          0          0          0          0          0          0          0   PDC-GIC 633 Level     i2c_geni
+115:       1198          0          0          0          0          0          0          0   PDC-GIC 635 Level     i2c_geni
+119:          0          0          0          0          0          0          0          0   PDC-GIC 386 Level     i2c_geni
+139:          0          0          0          0          0          0          0          0   PDC-GIC 507 Edge      jpegdma
+```

dev/default.nix

@@ -26,6 +26,7 @@
             ${pkgs.android-tools}/bin/avbtool add_hash_footer --partition_name dtbo --partition_size 2621440 --image $out/empty_dtbo.img
           '';
         # rootDir = builtins.toString ./..;
+        rootDir = "."; # Assume PWD as root for now
       in
       pkgs.mkShell {
         packages = with pkgs; [
@@ -33,7 +34,7 @@
             libfdt
           ]))
           (writeShellScriptBin "flash-lineage-magisk" ''
-            rootDir="." # Assume PWD as root for now
+            rootDir="${rootDir}"
             lineageBootImg="$rootDir/.cache/lineageos-magisk-boot.img"
 
             if [[ ! -e "$lineageBootImg" ]]; then
@@ -73,7 +74,28 @@
             heimdall flash \
                 --no-reboot \
                 --DTBO ${emptyDtbo}/empty_dtbo.img
-            pmbootstrap flasher --method heimdall-bootimg --resume flash_kernel
+            # does not work for some reason
+            # pmbootstrap flasher --method heimdall-bootimg --resume flash_kernel
+          '')
+          (writeShellScriptBin "init-repositories" ''
+            rootDir="${rootDir}"
+            mkdir -p "$rootDir/.repos"
+            [[ -d "$rootDir/.repos/mainline-kernel" ]] || git clone git@github.com:WiiPlayer2/linux-sm7150.git "$rootDir/.repos/mainline-kernel"
+          '')
+          (writeScriptBin "build-and-flash-kernel" ''
+            #!/usr/bin/env -S bash -e
+            rootDir="${rootDir}"
+            pmbootstrap --version
+            pushd $rootDir/.repos/mainline-kernel
+            trap "popd" EXIT
+            source $(pmbootstrap-envkernel)
+            if [[ ! -e ".output/.config" ]]; then
+              make defconfig sm7150.config
+            fi
+            make -j$(nproc)
+            pmbootstrap build --envkernel linux-postmarketos-qcom-sm7150
+            pmbootstrap flasher --method fastboot flash_kernel
+            fastboot reboot
           '')
         ];
       };