[PATCH] image: Add support for ZSTD decompression

[Tom Rini]

On Sat, Apr 25, 2020 at 07:37:21PM +0200, Robert Marko wrote:

> This patch adds support for ZSTD decompression of FIT images.
> 
> Signed-off-by: Robert Marko <robert.marko at sartura.hr>
> Cc: Luka Perkov <luka.perkov at sartura.hr>
> ---
>  common/image.c  | 52 +++++++++++++++++++++++++++++++++++++++++++++++++
>  include/image.h |  1 +
>  2 files changed, 53 insertions(+)
> 
> diff --git a/common/image.c b/common/image.c
> index 94873cb6ed..70ba0f4328 100644
> --- a/common/image.c
> +++ b/common/image.c
> @@ -42,6 +42,7 @@
>  #include <lzma/LzmaTypes.h>
>  #include <lzma/LzmaDec.h>
>  #include <lzma/LzmaTools.h>
> +#include <linux/zstd.h>
>  
>  #ifdef CONFIG_CMD_BDI
>  extern int do_bdinfo(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]);
> @@ -193,6 +194,7 @@ static const table_entry_t uimage_comp[] = {
>  	{	IH_COMP_LZMA,	"lzma",		"lzma compressed",	},
>  	{	IH_COMP_LZO,	"lzo",		"lzo compressed",	},
>  	{	IH_COMP_LZ4,	"lz4",		"lz4 compressed",	},
> +	{	IH_COMP_ZSTD,	"zstd",		"zstd compressed",	},
>  	{	-1,		"",		"",			},
>  };
>  
> @@ -480,6 +482,56 @@ int image_decomp(int comp, ulong load, ulong image_start, int type,
>  		break;
>  	}
>  #endif /* CONFIG_LZ4 */
> +#ifdef CONFIG_ZSTD

We need to add SPL_ZSTD as a symbol to lib/Kconfig and then use
CONFIG_IS_ENABLED() tests here to avoid growth in SPL.  Thanks!

-- 
Tom
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