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05/09/2024 07:14:15 AM
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amd_asic_type.h
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ati_pcigart.h
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bridge
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drmP.h
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drm_agpsupport.h
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drm_atomic.h
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drm_atomic_helper.h
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drm_auth.h
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drm_blend.h
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drm_bridge.h
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drm_cache.h
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drm_color_mgmt.h
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drm_connector.h
34.96 KB
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drm_crtc.h
32.42 KB
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drm_crtc_helper.h
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drm_debugfs.h
3.36 KB
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drm_debugfs_crc.h
2.66 KB
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drm_device.h
5.58 KB
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drm_displayid.h
3.24 KB
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drm_dp_dual_mode_helper.h
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drm_dp_helper.h
44.09 KB
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drm_dp_mst_helper.h
16.83 KB
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drm_drv.h
20.51 KB
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drm_edid.h
15.33 KB
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drm_encoder.h
7.99 KB
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drm_encoder_slave.h
6.46 KB
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drm_fb_cma_helper.h
1.38 KB
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drm_fb_helper.h
14.95 KB
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drm_file.h
10.59 KB
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drm_fixed.h
4.71 KB
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drm_flip_work.h
3.01 KB
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drm_fourcc.h
2.85 KB
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drm_framebuffer.h
9.86 KB
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drm_gem.h
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drm_gem_cma_helper.h
3.41 KB
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drm_gem_framebuffer_helper.h
1.17 KB
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drm_global.h
1.94 KB
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drm_hashtab.h
3.01 KB
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drm_ioctl.h
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drm_irq.h
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drm_lease.h
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drm_legacy.h
6.77 KB
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drm_mipi_dsi.h
10.08 KB
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drm_mm.h
16.48 KB
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drm_mode_config.h
25.93 KB
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drm_mode_object.h
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drm_modes.h
17.8 KB
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drm_modeset_helper.h
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drm_modeset_helper_vtables.h
48.62 KB
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drm_modeset_lock.h
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drm_of.h
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drm_os_linux.h
2.04 KB
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drm_panel.h
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drm_pci.h
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drm_pciids.h
66.48 KB
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drm_plane.h
20.38 KB
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drm_plane_helper.h
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drm_prime.h
3.06 KB
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drm_print.h
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drm_property.h
12.03 KB
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drm_rect.h
5.87 KB
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drm_scdc_helper.h
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drm_simple_kms_helper.h
3.99 KB
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drm_syncobj.h
4.13 KB
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drm_sysfs.h
287 bytes
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drm_vblank.h
7.23 KB
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drm_vma_manager.h
7.65 KB
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gma_drm.h
1.01 KB
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i2c
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i915_component.h
4.11 KB
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i915_drm.h
3.47 KB
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i915_pciids.h
15.55 KB
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intel-gtt.h
987 bytes
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intel_lpe_audio.h
1.72 KB
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tinydrm
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ttm
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05/09/2024 07:14:16 AM
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Editing: drm_fixed.h
Close
/* * Copyright 2009 Red Hat Inc. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR * OTHER DEALINGS IN THE SOFTWARE. * * Authors: Dave Airlie * Christian König */ #ifndef DRM_FIXED_H #define DRM_FIXED_H #include <linux/math64.h> typedef union dfixed { u32 full; } fixed20_12; #define dfixed_const(A) (u32)(((A) << 12))/* + ((B + 0.000122)*4096)) */ #define dfixed_const_half(A) (u32)(((A) << 12) + 2048) #define dfixed_const_666(A) (u32)(((A) << 12) + 2731) #define dfixed_const_8(A) (u32)(((A) << 12) + 3277) #define dfixed_mul(A, B) ((u64)((u64)(A).full * (B).full + 2048) >> 12) #define dfixed_init(A) { .full = dfixed_const((A)) } #define dfixed_init_half(A) { .full = dfixed_const_half((A)) } #define dfixed_trunc(A) ((A).full >> 12) #define dfixed_frac(A) ((A).full & ((1 << 12) - 1)) static inline u32 dfixed_floor(fixed20_12 A) { u32 non_frac = dfixed_trunc(A); return dfixed_const(non_frac); } static inline u32 dfixed_ceil(fixed20_12 A) { u32 non_frac = dfixed_trunc(A); if (A.full > dfixed_const(non_frac)) return dfixed_const(non_frac + 1); else return dfixed_const(non_frac); } static inline u32 dfixed_div(fixed20_12 A, fixed20_12 B) { u64 tmp = ((u64)A.full << 13); do_div(tmp, B.full); tmp += 1; tmp /= 2; return lower_32_bits(tmp); } #define DRM_FIXED_POINT 32 #define DRM_FIXED_ONE (1ULL << DRM_FIXED_POINT) #define DRM_FIXED_DECIMAL_MASK (DRM_FIXED_ONE - 1) #define DRM_FIXED_DIGITS_MASK (~DRM_FIXED_DECIMAL_MASK) #define DRM_FIXED_EPSILON 1LL #define DRM_FIXED_ALMOST_ONE (DRM_FIXED_ONE - DRM_FIXED_EPSILON) static inline s64 drm_int2fixp(int a) { return ((s64)a) << DRM_FIXED_POINT; } static inline int drm_fixp2int(s64 a) { return ((s64)a) >> DRM_FIXED_POINT; } static inline int drm_fixp2int_ceil(s64 a) { if (a > 0) return drm_fixp2int(a + DRM_FIXED_ALMOST_ONE); else return drm_fixp2int(a - DRM_FIXED_ALMOST_ONE); } static inline unsigned drm_fixp_msbset(s64 a) { unsigned shift, sign = (a >> 63) & 1; for (shift = 62; shift > 0; --shift) if (((a >> shift) & 1) != sign) return shift; return 0; } static inline s64 drm_fixp_mul(s64 a, s64 b) { unsigned shift = drm_fixp_msbset(a) + drm_fixp_msbset(b); s64 result; if (shift > 61) { shift = shift - 61; a >>= (shift >> 1) + (shift & 1); b >>= shift >> 1; } else shift = 0; result = a * b; if (shift > DRM_FIXED_POINT) return result << (shift - DRM_FIXED_POINT); if (shift < DRM_FIXED_POINT) return result >> (DRM_FIXED_POINT - shift); return result; } static inline s64 drm_fixp_div(s64 a, s64 b) { unsigned shift = 62 - drm_fixp_msbset(a); s64 result; a <<= shift; if (shift < DRM_FIXED_POINT) b >>= (DRM_FIXED_POINT - shift); result = div64_s64(a, b); if (shift > DRM_FIXED_POINT) return result >> (shift - DRM_FIXED_POINT); return result; } static inline s64 drm_fixp_from_fraction(s64 a, s64 b) { s64 res; bool a_neg = a < 0; bool b_neg = b < 0; u64 a_abs = a_neg ? -a : a; u64 b_abs = b_neg ? -b : b; u64 rem; /* determine integer part */ u64 res_abs = div64_u64_rem(a_abs, b_abs, &rem); /* determine fractional part */ { u32 i = DRM_FIXED_POINT; do { rem <<= 1; res_abs <<= 1; if (rem >= b_abs) { res_abs |= 1; rem -= b_abs; } } while (--i != 0); } /* round up LSB */ { u64 summand = (rem << 1) >= b_abs; res_abs += summand; } res = (s64) res_abs; if (a_neg ^ b_neg) res = -res; return res; } static inline s64 drm_fixp_exp(s64 x) { s64 tolerance = div64_s64(DRM_FIXED_ONE, 1000000); s64 sum = DRM_FIXED_ONE, term, y = x; u64 count = 1; if (x < 0) y = -1 * x; term = y; while (term >= tolerance) { sum = sum + term; count = count + 1; term = drm_fixp_mul(term, div64_s64(y, count)); } if (x < 0) sum = drm_fixp_div(DRM_FIXED_ONE, sum); return sum; } #endif