Merge tag 'drm-for-v4.15-amd-dc' of git://people.freedesktop.org/~airlied/linux

Pull amdgpu DC display code for Vega from Dave Airlie:
 "This is the pull request for the AMD DC (display code) layer which is
  a requirement to program the display engines on the new Vega and Raven
  based GPUs. It also contains support for all amdgpu supported GPUs
  (CIK, VI, Polaris), which has to be enabled. It is also a kms atomic
  modesetting compatible driver (unlike the current in-tree display
  code).

  I've kept it separate from drm-next because it may have some things
  that cause you to reject it.

  Background story:

  AMD have an internal team creating a shared OS codebase for display at
  hw bring up time using information from their hardware teams. This
  process doesn't lead to the most Linux friendly/looking code but we
  have worked together on cleaning a lot of it up and dealing with
  sparse/smatch/checkpatch, and having their team internally adhere to
  Linux coding standards.

  This tree is a complete history rebased since they started opening it,
  we decided not to squash it down as the history may have some value.
  Some of the commits therefore might not reach kernel standards, and we
  are steadily training people in AMD to better write commit msgs.

  There is a major bunch of generated bandwidth calculation and
  verification code that comes from their hardware team. On Vega and
  before this is float calculations, on Raven (DCN10) this is double
  based. They do the required things to do FP in the kernel, and I could
  understand this might raise some issues. Rewriting the bandwidth would
  be a major undertaken in reverification, it's non-trivial to work out
  if a display can handle the complete set of mode information thrown at
  it.

  Future story:

  There is a TODO list with this, and it address most of the remaining
  things that would be nice to refine/remove. The DCN10 code is still
  under development internally and they push out a lot of patches quite
  regularly and are supporting this code base with their display team. I
  think we've reached the point where keeping it out of tree is going to
  motivate distributions to start carrying the code, so I'd prefer we
  get it in tree. I think this code is slightly better than STAGING
  quality but not massively so, I'd really like to see that float/double
  magic gone and fixed point used, but AMD don't seem to think the
  accuracy and revalidation of the code is worth the effort"

* tag 'drm-for-v4.15-amd-dc' of git://people.freedesktop.org/~airlied/linux: (1110 commits)
  drm/amd/display: fix MST link training fail division by 0
  drm/amd/display: Fix formatting for null pointer dereference fix
  drm/amd/display: Remove dangling planes on dc commit state
  drm/amd/display: add flip_immediate to commit update for stream
  drm/amd/display: Miss register MST encoder cbs
  drm/amd/display: Fix warnings on S3 resume
  drm/amd/display: use num_timing_generator instead of pipe_count
  drm/amd/display: use configurable FBC option in dm
  drm/amd/display: fix AZ clock not enabled before program AZ endpoint
  amdgpu/dm: Don't use DRM_ERROR in amdgpu_dm_atomic_check
  amd/display: Fix potential null dereference in dce_calcs.c
  amdgpu/dm: Remove unused forward declaration
  drm/amdgpu: Remove unused dc_stream from amdgpu_crtc
  amdgpu/dc: Fix double unlock in amdgpu_dm_commit_planes
  amdgpu/dc: Fix missing null checks in amdgpu_dm.c
  amdgpu/dc: Fix potential null dereferences in amdgpu_dm.c
  amdgpu/dc: fix more indentation warnings
  amdgpu/dc: handle allocation failures in dc_commit_planes_to_stream.
  amdgpu/dc: fix indentation warning from smatch.
  amdgpu/dc: fix non-ansi function decls.
  ...

1 files changed, 166 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/display/dc/inc/bw_fixed.h b/drivers/gpu/drm/amd/display/dc/inc/bw_fixed.h
new file mode 100644
index 000000000000..39ee8eba3c31
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/inc/bw_fixed.h
@@ -0,0 +1,166 @@
+/*
+ * Copyright 2015 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
+ *
+ */
+
+#ifndef BW_FIXED_H_
+#define BW_FIXED_H_
+
+#define BW_FIXED_BITS_PER_FRACTIONAL_PART 24
+
+#define BW_FIXED_GET_INTEGER_PART(x) ((x) >> BW_FIXED_BITS_PER_FRACTIONAL_PART)
+struct bw_fixed {
+	int64_t value;
+};
+
+#define BW_FIXED_MIN_I32 \
+	(int64_t)(-(1LL << (63 - BW_FIXED_BITS_PER_FRACTIONAL_PART)))
+
+#define BW_FIXED_MAX_I32 \
+	(int64_t)((1ULL << (63 - BW_FIXED_BITS_PER_FRACTIONAL_PART)) - 1)
+
+static inline struct bw_fixed bw_min2(const struct bw_fixed arg1,
+				      const struct bw_fixed arg2)
+{
+	return (arg1.value <= arg2.value) ? arg1 : arg2;
+}
+
+static inline struct bw_fixed bw_max2(const struct bw_fixed arg1,
+				      const struct bw_fixed arg2)
+{
+	return (arg2.value <= arg1.value) ? arg1 : arg2;
+}
+
+static inline struct bw_fixed bw_min3(struct bw_fixed v1,
+				      struct bw_fixed v2,
+				      struct bw_fixed v3)
+{
+	return bw_min2(bw_min2(v1, v2), v3);
+}
+
+static inline struct bw_fixed bw_max3(struct bw_fixed v1,
+				      struct bw_fixed v2,
+				      struct bw_fixed v3)
+{
+	return bw_max2(bw_max2(v1, v2), v3);
+}
+
+struct bw_fixed bw_int_to_fixed_nonconst(int64_t value);
+static inline struct bw_fixed bw_int_to_fixed(int64_t value)
+{
+	if (__builtin_constant_p(value)) {
+		struct bw_fixed res;
+		BUILD_BUG_ON(value > BW_FIXED_MAX_I32 || value < BW_FIXED_MIN_I32);
+		res.value = value << BW_FIXED_BITS_PER_FRACTIONAL_PART;
+		return res;
+	} else
+		return bw_int_to_fixed_nonconst(value);
+}
+
+static inline int32_t bw_fixed_to_int(struct bw_fixed value)
+{
+	return BW_FIXED_GET_INTEGER_PART(value.value);
+}
+
+struct bw_fixed bw_frc_to_fixed(int64_t num, int64_t denum);
+
+static inline struct bw_fixed fixed31_32_to_bw_fixed(int64_t raw)
+{
+	struct bw_fixed result = { 0 };
+
+	if (raw < 0) {
+		raw = -raw;
+		result.value = -(raw >> (32 - BW_FIXED_BITS_PER_FRACTIONAL_PART));
+	} else {
+		result.value = raw >> (32 - BW_FIXED_BITS_PER_FRACTIONAL_PART);
+	}
+
+	return result;
+}
+
+static inline struct bw_fixed bw_add(const struct bw_fixed arg1,
+				     const struct bw_fixed arg2)
+{
+	struct bw_fixed res;
+
+	res.value = arg1.value + arg2.value;
+
+	return res;
+}
+
+static inline struct bw_fixed bw_sub(const struct bw_fixed arg1, const struct bw_fixed arg2)
+{
+	struct bw_fixed res;
+
+	res.value = arg1.value - arg2.value;
+
+	return res;
+}
+
+struct bw_fixed bw_mul(const struct bw_fixed arg1, const struct bw_fixed arg2);
+static inline struct bw_fixed bw_div(const struct bw_fixed arg1, const struct bw_fixed arg2)
+{
+	return bw_frc_to_fixed(arg1.value, arg2.value);
+}
+
+static inline struct bw_fixed bw_mod(const struct bw_fixed arg1, const struct bw_fixed arg2)
+{
+	struct bw_fixed res;
+	div64_u64_rem(arg1.value, arg2.value, &res.value);
+	return res;
+}
+
+struct bw_fixed bw_floor2(const struct bw_fixed arg, const struct bw_fixed significance);
+struct bw_fixed bw_ceil2(const struct bw_fixed arg, const struct bw_fixed significance);
+
+static inline bool bw_equ(const struct bw_fixed arg1, const struct bw_fixed arg2)
+{
+	return arg1.value == arg2.value;
+}
+
+static inline bool bw_neq(const struct bw_fixed arg1, const struct bw_fixed arg2)
+{
+	return arg1.value != arg2.value;
+}
+
+static inline bool bw_leq(const struct bw_fixed arg1, const struct bw_fixed arg2)
+{
+	return arg1.value <= arg2.value;
+}
+
+static inline bool bw_meq(const struct bw_fixed arg1, const struct bw_fixed arg2)
+{
+	return arg1.value >= arg2.value;
+}
+
+static inline bool bw_ltn(const struct bw_fixed arg1, const struct bw_fixed arg2)
+{
+	return arg1.value < arg2.value;
+}
+
+static inline bool bw_mtn(const struct bw_fixed arg1, const struct bw_fixed arg2)
+{
+	return arg1.value > arg2.value;
+}
+
+#endif //BW_FIXED_H_