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author | 2015-08-04 12:17:53 -0700 | |
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committer | 2015-08-04 15:44:42 -0700 | |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/drivers/video/fbdev/c2p_iplan2.c | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/drivers/video/fbdev/c2p_iplan2.c')
-rw-r--r-- | kernel/drivers/video/fbdev/c2p_iplan2.c | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/kernel/drivers/video/fbdev/c2p_iplan2.c b/kernel/drivers/video/fbdev/c2p_iplan2.c new file mode 100644 index 000000000..19156dc61 --- /dev/null +++ b/kernel/drivers/video/fbdev/c2p_iplan2.c @@ -0,0 +1,153 @@ +/* + * Fast C2P (Chunky-to-Planar) Conversion + * + * Copyright (C) 2003-2008 Geert Uytterhoeven + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file COPYING in the main directory of this archive + * for more details. + */ + +#include <linux/module.h> +#include <linux/string.h> + +#include <asm/unaligned.h> + +#include "c2p.h" +#include "c2p_core.h" + + + /* + * Perform a full C2P step on 16 8-bit pixels, stored in 4 32-bit words + * containing + * - 16 8-bit chunky pixels on input + * - permutated planar data (2 planes per 32-bit word) on output + */ + +static void c2p_16x8(u32 d[4]) +{ + transp4(d, 8, 2); + transp4(d, 1, 2); + transp4x(d, 16, 2); + transp4x(d, 2, 2); + transp4(d, 4, 1); +} + + + /* + * Array containing the permutation indices of the planar data after c2p + */ + +static const int perm_c2p_16x8[4] = { 1, 3, 0, 2 }; + + + /* + * Store a full block of iplan2 data after c2p conversion + */ + +static inline void store_iplan2(void *dst, u32 bpp, u32 d[4]) +{ + int i; + + for (i = 0; i < bpp/2; i++, dst += 4) + put_unaligned_be32(d[perm_c2p_16x8[i]], dst); +} + + + /* + * Store a partial block of iplan2 data after c2p conversion + */ + +static inline void store_iplan2_masked(void *dst, u32 bpp, u32 d[4], u32 mask) +{ + int i; + + for (i = 0; i < bpp/2; i++, dst += 4) + put_unaligned_be32(comp(d[perm_c2p_16x8[i]], + get_unaligned_be32(dst), mask), + dst); +} + + + /* + * c2p_iplan2 - Copy 8-bit chunky image data to an interleaved planar + * frame buffer with 2 bytes of interleave + * @dst: Starting address of the planar frame buffer + * @dx: Horizontal destination offset (in pixels) + * @dy: Vertical destination offset (in pixels) + * @width: Image width (in pixels) + * @height: Image height (in pixels) + * @dst_nextline: Frame buffer offset to the next line (in bytes) + * @src_nextline: Image offset to the next line (in bytes) + * @bpp: Bits per pixel of the planar frame buffer (2, 4, or 8) + */ + +void c2p_iplan2(void *dst, const void *src, u32 dx, u32 dy, u32 width, + u32 height, u32 dst_nextline, u32 src_nextline, u32 bpp) +{ + union { + u8 pixels[16]; + u32 words[4]; + } d; + u32 dst_idx, first, last, w; + const u8 *c; + void *p; + + dst += dy*dst_nextline+(dx & ~15)*bpp; + dst_idx = dx % 16; + first = 0xffffU >> dst_idx; + first |= first << 16; + last = 0xffffU ^ (0xffffU >> ((dst_idx+width) % 16)); + last |= last << 16; + while (height--) { + c = src; + p = dst; + w = width; + if (dst_idx+width <= 16) { + /* Single destination word */ + first &= last; + memset(d.pixels, 0, sizeof(d)); + memcpy(d.pixels+dst_idx, c, width); + c += width; + c2p_16x8(d.words); + store_iplan2_masked(p, bpp, d.words, first); + p += bpp*2; + } else { + /* Multiple destination words */ + w = width; + /* Leading bits */ + if (dst_idx) { + w = 16 - dst_idx; + memset(d.pixels, 0, dst_idx); + memcpy(d.pixels+dst_idx, c, w); + c += w; + c2p_16x8(d.words); + store_iplan2_masked(p, bpp, d.words, first); + p += bpp*2; + w = width-w; + } + /* Main chunk */ + while (w >= 16) { + memcpy(d.pixels, c, 16); + c += 16; + c2p_16x8(d.words); + store_iplan2(p, bpp, d.words); + p += bpp*2; + w -= 16; + } + /* Trailing bits */ + w %= 16; + if (w > 0) { + memcpy(d.pixels, c, w); + memset(d.pixels+w, 0, 16-w); + c2p_16x8(d.words); + store_iplan2_masked(p, bpp, d.words, last); + } + } + src += src_nextline; + dst += dst_nextline; + } +} +EXPORT_SYMBOL_GPL(c2p_iplan2); + +MODULE_LICENSE("GPL"); |