[ptxdist] [PATCH v3 3/5] image-root-squashfs: add zstd compression option

[Bruno Thomsen <bruno.thomsen@gmail.com>]

Set block size and compression level parameters for optimal
result by default.

BLOCK_SIZE="1M"
EXTRA_ARGS="-Xcompression-level 22"

It's still very	fast on	an ordinary laptop.

Signed-off-by: Bruno Thomsen <bruno.thomsen@gmail.com>
---
Changes since version 2:
Moved from 0002 to 0003.
Select HOST_SQUASHFS_TOOLS_ZSTD_SUPPORT option.

No changes since version 1.

 platforms/image-root-squashfs.in | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/platforms/image-root-squashfs.in b/platforms/image-root-squashfs.in
index 5f9368770..98aae9c1c 100644
--- a/platforms/image-root-squashfs.in
+++ b/platforms/image-root-squashfs.in
@@ -4,6 +4,7 @@ menuconfig IMAGE_ROOT_SQUASHFS
 	tristate
 	select HOST_GENIMAGE
 	select HOST_SQUASHFS_TOOLS
+	select HOST_SQUASHFS_TOOLS_ZSTD_SUPPORT	if IMAGE_ROOT_SQUASHFS_COMPRESSION_MODE_ZSTD
 	select IMAGE_ROOT_TGZ
 	prompt "Generate images/root.squashfs "
 	help
@@ -45,6 +46,11 @@ choice
 	help
 	  Select your preferred compression mode.
 
+	config IMAGE_ROOT_SQUASHFS_COMPRESSION_MODE_ZSTD
+	bool "zstd"
+	help
+	  Select your preferred compression mode.
+
 endchoice
 
 config IMAGE_ROOT_SQUASHFS_COMPRESSION_MODE
@@ -54,10 +60,12 @@ config IMAGE_ROOT_SQUASHFS_COMPRESSION_MODE
         default "lzo" if IMAGE_ROOT_SQUASHFS_COMPRESSION_MODE_LZO
         default "lz4" if IMAGE_ROOT_SQUASHFS_COMPRESSION_MODE_LZ4
         default "xz" if IMAGE_ROOT_SQUASHFS_COMPRESSION_MODE_XZ
+        default "zstd" if IMAGE_ROOT_SQUASHFS_COMPRESSION_MODE_ZSTD
 
 config IMAGE_ROOT_SQUASHFS_BLOCK_SIZE
 	string
-	default "128k"
+	default "128k" if !IMAGE_ROOT_SQUASHFS_COMPRESSION_MODE_ZSTD
+	default "1M" if IMAGE_ROOT_SQUASHFS_COMPRESSION_MODE_ZSTD
 	prompt "Block size"
 	help
 	  This allows the compression data block size to be selected, both "K" and "M"
@@ -65,6 +73,8 @@ config IMAGE_ROOT_SQUASHFS_BLOCK_SIZE
 
 config IMAGE_ROOT_SQUASHFS_EXTRA_ARGS
 	string
+	default "" if !IMAGE_ROOT_SQUASHFS_COMPRESSION_MODE_ZSTD
+	default "-Xcompression-level 22" if IMAGE_ROOT_SQUASHFS_COMPRESSION_MODE_ZSTD
 	prompt "extra arguments passed to mksquashfs"
 	help
 	  You can add extra arguments for mksquashfs here
-- 
2.26.2


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