drm/amd/dc: Add dc display driver (v2)

Supported DCE versions: 8.0, 10.0, 11.0, 11.2

v2: rebase against 4.11

Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/basics/fixpt32_32.c

@@ -0,0 +1,221 @@
+/*
+ * Copyright 2012-15 Advanced Micro Devices, 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: AMD
+ *
+ */
+
+#include "dm_services.h"
+#include "include/fixed32_32.h"
+
+static uint64_t u64_div(uint64_t n, uint64_t d)
+{
+	uint32_t i = 0;
+	uint64_t r;
+	uint64_t q = div64_u64_rem(n, d, &r);
+
+	for (i = 0; i < 32; ++i) {
+		uint64_t sbit = q & (1ULL<<63);
+
+		r <<= 1;
+		r |= sbit ? 1 : 0;
+		q <<= 1;
+		if (r >= d) {
+			r -= d;
+			q |= 1;
+		}
+	}
+
+	if (2*r >= d)
+		q += 1;
+	return q;
+}
+
+struct fixed32_32 dal_fixed32_32_from_fraction(uint32_t n, uint32_t d)
+{
+	struct fixed32_32 fx;
+
+	fx.value = u64_div((uint64_t)n << 32, (uint64_t)d << 32);
+	return fx;
+}
+
+struct fixed32_32 dal_fixed32_32_from_int(uint32_t value)
+{
+	struct fixed32_32 fx;
+
+	fx.value = (uint64_t)value<<32;
+	return fx;
+}
+
+struct fixed32_32 dal_fixed32_32_add(
+	struct fixed32_32 lhs,
+	struct fixed32_32 rhs)
+{
+	struct fixed32_32 fx = {lhs.value + rhs.value};
+
+	ASSERT(fx.value >= rhs.value);
+	return fx;
+}
+
+struct fixed32_32 dal_fixed32_32_add_int(struct fixed32_32 lhs, uint32_t rhs)
+{
+	struct fixed32_32 fx = {lhs.value + ((uint64_t)rhs << 32)};
+
+	ASSERT(fx.value >= (uint64_t)rhs << 32);
+	return fx;
+
+}
+struct fixed32_32 dal_fixed32_32_sub(
+	struct fixed32_32 lhs,
+	struct fixed32_32 rhs)
+{
+	struct fixed32_32 fx;
+
+	ASSERT(lhs.value >= rhs.value);
+	fx.value = lhs.value - rhs.value;
+	return fx;
+}
+
+struct fixed32_32 dal_fixed32_32_sub_int(struct fixed32_32 lhs, uint32_t rhs)
+{
+	struct fixed32_32 fx;
+
+	ASSERT(lhs.value >= ((uint64_t)rhs<<32));
+	fx.value = lhs.value - ((uint64_t)rhs<<32);
+	return fx;
+}
+
+struct fixed32_32 dal_fixed32_32_mul(
+	struct fixed32_32 lhs,
+	struct fixed32_32 rhs)
+{
+	struct fixed32_32 fx;
+	uint64_t lhs_int = lhs.value>>32;
+	uint64_t lhs_frac = (uint32_t)lhs.value;
+	uint64_t rhs_int = rhs.value>>32;
+	uint64_t rhs_frac = (uint32_t)rhs.value;
+	uint64_t ahbh = lhs_int * rhs_int;
+	uint64_t ahbl = lhs_int * rhs_frac;
+	uint64_t albh = lhs_frac * rhs_int;
+	uint64_t albl = lhs_frac * rhs_frac;
+
+	ASSERT((ahbh>>32) == 0);
+
+	fx.value = (ahbh<<32) + ahbl + albh + (albl>>32);
+	return fx;
+
+}
+
+struct fixed32_32 dal_fixed32_32_mul_int(struct fixed32_32 lhs, uint32_t rhs)
+{
+	struct fixed32_32 fx;
+	uint64_t lhsi = (lhs.value>>32) * (uint64_t)rhs;
+	uint64_t lhsf;
+
+	ASSERT((lhsi>>32) == 0);
+	lhsf = ((uint32_t)lhs.value) * (uint64_t)rhs;
+	ASSERT((lhsi<<32) + lhsf >= lhsf);
+	fx.value = (lhsi<<32) + lhsf;
+	return fx;
+}
+
+struct fixed32_32 dal_fixed32_32_div(
+	struct fixed32_32 lhs,
+	struct fixed32_32 rhs)
+{
+	struct fixed32_32 fx;
+
+	fx.value = u64_div(lhs.value, rhs.value);
+	return fx;
+}
+
+struct fixed32_32 dal_fixed32_32_div_int(struct fixed32_32 lhs, uint32_t rhs)
+{
+	struct fixed32_32 fx;
+
+	fx.value = u64_div(lhs.value, (uint64_t)rhs << 32);
+	return fx;
+}
+
+struct fixed32_32 dal_fixed32_32_min(
+	struct fixed32_32 lhs,
+	struct fixed32_32 rhs)
+{
+	return (lhs.value < rhs.value) ? lhs : rhs;
+}
+
+struct fixed32_32 dal_fixed32_32_max(
+	struct fixed32_32 lhs,
+	struct fixed32_32 rhs)
+{
+	return (lhs.value > rhs.value) ? lhs : rhs;
+}
+
+bool dal_fixed32_32_gt(struct fixed32_32 lhs, struct fixed32_32 rhs)
+{
+	return lhs.value > rhs.value;
+}
+bool dal_fixed32_32_gt_int(struct fixed32_32 lhs, uint32_t rhs)
+{
+	return lhs.value > ((uint64_t)rhs<<32);
+}
+
+bool dal_fixed32_32_lt(struct fixed32_32 lhs, struct fixed32_32 rhs)
+{
+	return lhs.value < rhs.value;
+}
+
+bool dal_fixed32_32_le(struct fixed32_32 lhs, struct fixed32_32 rhs)
+{
+	return lhs.value <= rhs.value;
+}
+
+bool dal_fixed32_32_lt_int(struct fixed32_32 lhs, uint32_t rhs)
+{
+	return lhs.value < ((uint64_t)rhs<<32);
+}
+
+bool dal_fixed32_32_le_int(struct fixed32_32 lhs, uint32_t rhs)
+{
+	return lhs.value <= ((uint64_t)rhs<<32);
+}
+
+uint32_t dal_fixed32_32_ceil(struct fixed32_32 v)
+{
+	ASSERT((uint32_t)v.value ? (v.value >> 32) + 1 >= 1 : true);
+	return (v.value>>32) + ((uint32_t)v.value ? 1 : 0);
+}
+
+uint32_t dal_fixed32_32_floor(struct fixed32_32 v)
+{
+	return v.value>>32;
+}
+
+uint32_t dal_fixed32_32_round(struct fixed32_32 v)
+{
+	ASSERT(v.value + (1ULL<<31) >= (1ULL<<31));
+	return (v.value + (1ULL<<31))>>32;
+}
+
+bool dal_fixed32_32_eq(struct fixed32_32 lhs, struct fixed32_32 rhs)
+{
+	return lhs.value == rhs.value;
+}