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Revision f939a5f432981872f89d4dfe506e959f49cc161a authored by Dave Airlie on 24 June 2016, 00:51:12 UTC, committed by Dave Airlie on 24 June 2016, 00:51:12 UTC 
Merge branch 'drm-fixes-4.7' of git://people.freedesktop.org/~agd5f/linux into drm-fixes
 
A bit bigger than I would normally like, but most of the large changes are
for polaris support and since polaris went upstream in 4.7, I'd like
to get the fixes in so it's in good shape when the hw becomes available.
The major changes only touch the polaris code so there is little chance
for regressions on other asics.  The rest are just the usual collection
of bug fixes.

* 'drm-fixes-4.7' of git://people.freedesktop.org/~agd5f/linux:
  drm/amd/powerplay: enable clock stretch feature for polaris
  drm/amdgpu/gfx8: update golden setting for polaris10
  drm/amd/powerplay: enable avfs feature for polaris
  drm/amdgpu/atombios: add avfs struct for Polaris10/11
  drm/amd/powerplay: add avfs related define for polaris
  drm/amd/powrplay: enable stutter_mode for polaris.
  drm/amd/powerplay: disable UVD SMU handshake for MCLK.
  drm/amd/powerplay: initialize variables which were missed.
  drm/amd/powerplay: enable PowerContainment feature for polaris10/11.
  drm/amd/powerplay: need to notify system bios pcie device ready
  drm/amd/powerplay: fix bug that function parameter was incorect.
  drm/amd/powerplay: fix logic error.
  drm/amdgpu: initialize amdgpu_cgs_acpi_eval_object result value
  drm/amdgpu: precedence bug in amdgpu_device_init()
  drm/amdgpu: fix num_rbs exposed to userspace (v2)
  drm/amdgpu: missing bounds check in amdgpu_set_pp_force_state()
2 parent s c65c3de + 270d013
Raw File
decompress.c 
/*
 * decompress.c
 *
 * Detect the decompression method based on magic number
 */

#include <linux/decompress/generic.h>

#include <linux/decompress/bunzip2.h>
#include <linux/decompress/unlzma.h>
#include <linux/decompress/unxz.h>
#include <linux/decompress/inflate.h>
#include <linux/decompress/unlzo.h>
#include <linux/decompress/unlz4.h>

#include <linux/types.h>
#include <linux/string.h>
#include <linux/init.h>
#include <linux/printk.h>

#ifndef CONFIG_DECOMPRESS_GZIP
# define gunzip NULL
#endif
#ifndef CONFIG_DECOMPRESS_BZIP2
# define bunzip2 NULL
#endif
#ifndef CONFIG_DECOMPRESS_LZMA
# define unlzma NULL
#endif
#ifndef CONFIG_DECOMPRESS_XZ
# define unxz NULL
#endif
#ifndef CONFIG_DECOMPRESS_LZO
# define unlzo NULL
#endif
#ifndef CONFIG_DECOMPRESS_LZ4
# define unlz4 NULL
#endif

struct compress_format {
	unsigned char magic[2];
	const char *name;
	decompress_fn decompressor;
};

static const struct compress_format compressed_formats[] __initconst = {
	{ {0x1f, 0x8b}, "gzip", gunzip },
	{ {0x1f, 0x9e}, "gzip", gunzip },
	{ {0x42, 0x5a}, "bzip2", bunzip2 },
	{ {0x5d, 0x00}, "lzma", unlzma },
	{ {0xfd, 0x37}, "xz", unxz },
	{ {0x89, 0x4c}, "lzo", unlzo },
	{ {0x02, 0x21}, "lz4", unlz4 },
	{ {0, 0}, NULL, NULL }
};

decompress_fn __init decompress_method(const unsigned char *inbuf, long len,
				const char **name)
{
	const struct compress_format *cf;

	if (len < 2) {
		if (name)
			*name = NULL;
		return NULL;	/* Need at least this much... */
	}

	pr_debug("Compressed data magic: %#.2x %#.2x\n", inbuf[0], inbuf[1]);

	for (cf = compressed_formats; cf->name; cf++) {
		if (!memcmp(inbuf, cf->magic, 2))
			break;

	}
	if (name)
		*name = cf->name;
	return cf->decompressor;
}
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