/* * 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 #include #include #include "c2p.h" #include "c2p_core.h" /* * Perform a full C2P step on 32 8-bit pixels, stored in 8 32-bit words * containing * - 32 8-bit chunky pixels on input * - permutated planar data (1 plane per 32-bit word) on output */ static void c2p_32x8(u32 d[8]) { transp8(d, 16, 4); transp8(d, 8, 2); transp8(d, 4, 1); transp8(d, 2, 4); transp8(d, 1, 2); } /* * Array containing the permutation indices of the planar data after c2p */ static const int perm_c2p_32x8[8] = { 7, 5, 3, 1, 6, 4, 2, 0 }; /* * Store a full block of planar data after c2p conversion */ static inline void store_planar(void *dst, u32 dst_inc, u32 bpp, u32 d[8]) { int i; for (i = 0; i < bpp; i++, dst += dst_inc) put_unaligned_be32(d[perm_c2p_32x8[i]], dst); } /* * Store a partial block of planar data after c2p conversion */ static inline void store_planar_masked(void *dst, u32 dst_inc, u32 bpp, u32 d[8], u32 mask) { int i; for (i = 0; i < bpp; i++, dst += dst_inc) put_unaligned_be32(comp(d[perm_c2p_32x8[i]], get_unaligned_be32(dst), mask), dst); } /* * c2p_planar - Copy 8-bit chunky image data to a planar frame buffer * @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) * @dst_nextplane: Frame buffer offset to the next plane (in bytes) * @src_nextline: Image offset to the next line (in bytes) * @bpp: Bits per pixel of the planar frame buffer (1-8) */ void c2p_planar(void *dst, const void *src, u32 dx, u32 dy, u32 width, u32 height, u32 dst_nextline, u32 dst_nextplane, u32 src_nextline, u32 bpp) { union { u8 pixels[32]; u32 words[8]; } d; u32 dst_idx, first, last, w; const u8 *c; void *p; dst += dy*dst_nextline+(dx & ~31); dst_idx = dx % 32; first = 0xffffffffU >> dst_idx; last = ~(0xffffffffU >> ((dst_idx+width) % 32)); while (height--) { c = src; p = dst; w = width; if (dst_idx+width <= 32) { /* Single destination word */ first &= last; memset(d.pixels, 0, sizeof(d)); memcpy(d.pixels+dst_idx, c, width); c += width; c2p_32x8(d.words); store_planar_masked(p, dst_nextplane, bpp, d.words, first); p += 4; } else { /* Multiple destination words */ w = width; /* Leading bits */ if (dst_idx) { w = 32 - dst_idx; memset(d.pixels, 0, dst_idx); memcpy(d.pixels+dst_idx, c, w); c += w; c2p_32x8(d.words); store_planar_masked(p, dst_nextplane, bpp, d.words, first); p += 4; w = width-w; } /* Main chunk */ while (w >= 32) { memcpy(d.pixels, c, 32); c += 32; c2p_32x8(d.words); store_planar(p, dst_nextplane, bpp, d.words); p += 4; w -= 32; } /* Trailing bits */ w %= 32; if (w > 0) { memcpy(d.pixels, c, w); memset(d.pixels+w, 0, 32-w); c2p_32x8(d.words); store_planar_masked(p, dst_nextplane, bpp, d.words, last); } } src += src_nextline; dst += dst_nextline; } } EXPORT_SYMBOL_GPL(c2p_planar); MODULE_LICENSE("GPL"); name='id' value='aaaec6fc755447a1d056765b11b24d8ff2b81366'/>
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authorThomas Gleixner <tglx@linutronix.de>2017-01-31 19:03:21 +0100
committerThomas Gleixner <tglx@linutronix.de>2017-01-31 20:22:18 +0100
commitaaaec6fc755447a1d056765b11b24d8ff2b81366 (patch)
treea7f4167960ee1df86739905b6ccdeb95465bfe5f /net/batman-adv/hard-interface.h
parent08d85f3ea99f1eeafc4e8507936190e86a16ee8c (diff)
x86/irq: Make irq activate operations symmetric
The recent commit which prevents double activation of interrupts unearthed interesting code in x86. The code (ab)uses irq_domain_activate_irq() to reconfigure an already activated interrupt. That trips over the prevention code now. Fix it by deactivating the interrupt before activating the new configuration. Fixes: 08d85f3ea99f1 "irqdomain: Avoid activating interrupts more than once" Reported-and-tested-by: Mike Galbraith <efault@gmx.de> Reported-and-tested-by: Borislav Petkov <bp@alien8.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: stable@vger.kernel.org Link: http://lkml.kernel.org/r/alpine.DEB.2.20.1701311901580.3457@nanos
Diffstat (limited to 'net/batman-adv/hard-interface.h')