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Name	Size	Permission
bridge	[ DIR ]	drwxr-xr-x
i2c	[ DIR ]	drwxr-xr-x
tinydrm	[ DIR ]	drwxr-xr-x
ttm	[ DIR ]	drwxr-xr-x
amd_asic_type.h	1.54 KB	-rw-r--r--
ati_pcigart.h	731 B	-rw-r--r--
drmP.h	10.84 KB	-rw-r--r--
drm_agpsupport.h	3.81 KB	-rw-r--r--
drm_atomic.h	30.49 KB	-rw-r--r--
drm_atomic_helper.h	10.7 KB	-rw-r--r--
drm_auth.h	3.4 KB	-rw-r--r--
drm_blend.h	2.05 KB	-rw-r--r--
drm_bridge.h	10.06 KB	-rw-r--r--
drm_cache.h	2.81 KB	-rw-r--r--
drm_color_mgmt.h	1.55 KB	-rw-r--r--
drm_connector.h	34.96 KB	-rw-r--r--
drm_crtc.h	32.42 KB	-rw-r--r--
drm_crtc_helper.h	3.27 KB	-rw-r--r--
drm_debugfs.h	3.36 KB	-rw-r--r--
drm_debugfs_crc.h	2.66 KB	-rw-r--r--
drm_device.h	5.28 KB	-rw-r--r--
drm_displayid.h	3.24 KB	-rw-r--r--
drm_dp_dual_mode_helper.h	4.43 KB	-rw-r--r--
drm_dp_helper.h	44.09 KB	-rw-r--r--
drm_dp_mst_helper.h	16.83 KB	-rw-r--r--
drm_drv.h	20.51 KB	-rw-r--r--
drm_edid.h	15.26 KB	-rw-r--r--
drm_encoder.h	7.99 KB	-rw-r--r--
drm_encoder_slave.h	6.46 KB	-rw-r--r--
drm_fb_cma_helper.h	1.38 KB	-rw-r--r--
drm_fb_helper.h	14.95 KB	-rw-r--r--
drm_file.h	10.59 KB	-rw-r--r--
drm_fixed.h	4.71 KB	-rw-r--r--
drm_flip_work.h	3.01 KB	-rw-r--r--
drm_fourcc.h	2.85 KB	-rw-r--r--
drm_framebuffer.h	9.86 KB	-rw-r--r--
drm_gem.h	9.83 KB	-rw-r--r--
drm_gem_cma_helper.h	3.41 KB	-rw-r--r--
drm_gem_framebuffer_helper.h	1.17 KB	-rw-r--r--
drm_global.h	1.94 KB	-rw-r--r--
drm_hashtab.h	3.01 KB	-rw-r--r--
drm_ioctl.h	6.21 KB	-rw-r--r--
drm_irq.h	1.29 KB	-rw-r--r--
drm_lease.h	1.43 KB	-rw-r--r--
drm_legacy.h	6.77 KB	-rw-r--r--
drm_mipi_dsi.h	10.08 KB	-rw-r--r--
drm_mm.h	16.48 KB	-rw-r--r--
drm_mode_config.h	25.93 KB	-rw-r--r--
drm_mode_object.h	5.77 KB	-rw-r--r--
drm_modes.h	17.8 KB	-rw-r--r--
drm_modeset_helper.h	1.57 KB	-rw-r--r--
drm_modeset_helper_vtables.h	48.62 KB	-rw-r--r--
drm_modeset_lock.h	4.02 KB	-rw-r--r--
drm_of.h	3.17 KB	-rw-r--r--
drm_os_linux.h	2.04 KB	-rw-r--r--
drm_panel.h	7 KB	-rw-r--r--
drm_pci.h	2.45 KB	-rw-r--r--
drm_pciids.h	66.48 KB	-rw-r--r--
drm_plane.h	20.38 KB	-rw-r--r--
drm_plane_helper.h	3.2 KB	-rw-r--r--
drm_prime.h	3.06 KB	-rw-r--r--
drm_print.h	3.58 KB	-rw-r--r--
drm_property.h	12.03 KB	-rw-r--r--
drm_rect.h	5.87 KB	-rw-r--r--
drm_scdc_helper.h	4.34 KB	-rw-r--r--
drm_simple_kms_helper.h	3.99 KB	-rw-r--r--
drm_syncobj.h	4.13 KB	-rw-r--r--
drm_sysfs.h	287 B	-rw-r--r--
drm_vblank.h	6.32 KB	-rw-r--r--
drm_vma_manager.h	7.63 KB	-rw-r--r--
gma_drm.h	1.01 KB	-rw-r--r--
i915_component.h	4.11 KB	-rw-r--r--
i915_drm.h	3.47 KB	-rw-r--r--
i915_pciids.h	15.55 KB	-rw-r--r--
intel-gtt.h	987 B	-rw-r--r--
intel_lpe_audio.h	1.72 KB	-rw-r--r--

Code Editor : drm_fixed.h

/*
 * 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

${this.title}

Code Editor : drm_fixed.h