The display core files rely on FPU, which requires to be compiled with
special flags. Ideally, we don't want these FPU operations spread around
the DC code; nevertheless, it happens in the current source. This commit
introduces a new directory named fpu_operations that intends to
centralize all files that require the FPU compilation flag. As part of
this new component, this patch also moves one of the functions
(dcn20_populate_dml_writeback_from_context) that require FPU access to a
single shared file. Notice that this is the first part of the work, and
it does not fix the FPU issue yet; we still need other patches for
achieving the complete FPU isolation.
Changes since V2:
- Christian: Remove unnecessary wrapper.
- lkp: Add missing prototype.
- Only compile the FPU operations if the DCN option is enabled.
Change since V1:
- Update documentation and rebase.
Cc: Harry Wentland <harry.wentland@xxxxxxx>
Cc: Anson Jacob <Anson.Jacob@xxxxxxx>
Cc: Christian König <christian.koenig@xxxxxxx>
Cc: Hersen Wu <hersenxs.wu@xxxxxxx>
Cc: Aric Cyr <aric.cyr@xxxxxxx>
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Signed-off-by: Rodrigo Siqueira <Rodrigo.Siqueira@xxxxxxx>
---
drivers/gpu/drm/amd/display/dc/Makefile | 1 +
.../drm/amd/display/dc/dcn20/dcn20_resource.c | 39 +--------
.../drm/amd/display/dc/dcn20/dcn20_resource.h | 2 -
.../drm/amd/display/dc/dcn21/dcn21_resource.c | 2 +
.../amd/display/dc/fpu_operations/Makefile | 58 +++++++++++++
.../drm/amd/display/dc/fpu_operations/dcn2x.c | 84 +++++++++++++++++++
.../drm/amd/display/dc/fpu_operations/dcn2x.h | 33 ++++++++
7 files changed, 180 insertions(+), 39 deletions(-)
create mode 100644 drivers/gpu/drm/amd/display/dc/fpu_operations/Makefile
create mode 100644 drivers/gpu/drm/amd/display/dc/fpu_operations/dcn2x.c
create mode 100644 drivers/gpu/drm/amd/display/dc/fpu_operations/dcn2x.h
diff --git a/drivers/gpu/drm/amd/display/dc/Makefile b/drivers/gpu/drm/amd/display/dc/Makefile
index 943fcb164876..0de4baefa91e 100644
--- a/drivers/gpu/drm/amd/display/dc/Makefile
+++ b/drivers/gpu/drm/amd/display/dc/Makefile
@@ -35,6 +35,7 @@ DC_LIBS += dcn301
DC_LIBS += dcn302
DC_LIBS += dcn303
DC_LIBS += dcn31
+DC_LIBS += fpu_operations
endif
DC_LIBS += dce120
diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c
index 1b05a37b674d..f99b09643a52 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c
@@ -35,6 +35,8 @@
#include "include/irq_service_interface.h"
#include "dcn20/dcn20_resource.h"
+#include "fpu_operations/dcn2x.h"
+
#include "dcn10/dcn10_hubp.h"
#include "dcn10/dcn10_ipp.h"
#include "dcn20_hubbub.h"
@@ -1974,43 +1976,6 @@ void dcn20_split_stream_for_mpc(
ASSERT(primary_pipe->plane_state);
}
-void dcn20_populate_dml_writeback_from_context(
- struct dc *dc, struct resource_context *res_ctx, display_e2e_pipe_params_st *pipes)
-
- pipe_cnt++;
- }
-
-}
-
int dcn20_populate_dml_pipes_from_context(
struct dc *dc,
struct dc_state *context,
diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.h b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.h
index c8f3127bbcdf..6ec8ff45f0f7 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.h
+++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.h
@@ -58,8 +58,6 @@ struct pipe_ctx *dcn20_acquire_idle_pipe_for_layer(
struct dc_state *state,
const struct resource_pool *pool,
struct dc_stream_state *stream);
-void dcn20_populate_dml_writeback_from_context(
- struct dc *dc, struct resource_context *res_ctx, display_e2e_pipe_params_st *pipes);
struct stream_encoder *dcn20_stream_encoder_create(
enum engine_id eng_id,
diff --git a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c
index f3d98e3ba624..85385144e2c5 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c
@@ -35,6 +35,8 @@
#include "include/irq_service_interface.h"
#include "dcn20/dcn20_resource.h"
+#include "fpu_operations/dcn2x.h"
+
#include "clk_mgr.h"
#include "dcn10/dcn10_hubp.h"
#include "dcn10/dcn10_ipp.h"
diff --git a/drivers/gpu/drm/amd/display/dc/fpu_operations/Makefile b/drivers/gpu/drm/amd/display/dc/fpu_operations/Makefile
new file mode 100644
index 000000000000..7f6f90c3f267
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/fpu_operations/Makefile
@@ -0,0 +1,58 @@
+# SPDX-License-Identifier: MIT
+#
+# Copyright 2021 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.
+#
+#
+# Makefile for fpu operations component.
+#
+
+FPU_OPERATIONS = dcn2x.o
+
+ifdef CONFIG_X86
+fpu_ccflags := -mhard-float -msse
+endif
+
+ifdef CONFIG_PPC64
+fpu_ccflags := -mhard-float -maltivec
+endif
+
+ifdef CONFIG_CC_IS_GCC
+ifeq ($(call cc-ifversion, -lt, 0701, y), y)
+IS_OLD_GCC = 1
+endif
+endif
+
+ifdef CONFIG_X86
+ifdef IS_OLD_GCC
+# Stack alignment mismatch, proceed with caution.
+# GCC < 7.1 cannot compile code using `double` and -mpreferred-stack-boundary=3
+# (8B stack alignment).
+fpu_ccflags := -mpreferred-stack-boundary=4
+else
+fpu_ccflags := -msse2
+endif
+endif
+
+CFLAGS_$(AMDDALPATH)/dc/fpu_operations/dcn2x.o += $(fpu_ccflags)
+
+AMD_DAL_FPU_OPERATIONS = $(addprefix $(AMDDALPATH)/dc/fpu_operations/,$(FPU_OPERATIONS))
+
+AMD_DISPLAY_FILES += $(AMD_DAL_FPU_OPERATIONS)
diff --git a/drivers/gpu/drm/amd/display/dc/fpu_operations/dcn2x.c b/drivers/gpu/drm/amd/display/dc/fpu_operations/dcn2x.c
new file mode 100644
index 000000000000..95a0b89302a9
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/fpu_operations/dcn2x.c
@@ -0,0 +1,84 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright 2021 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 "resource.h"
+
+#include "fpu_operations/dcn2x.h"
+
+/**
+ * DOC: DCN2x FPU manipulation Overview
+ *
+ * The DCN architecture relies on FPU operations, which require special
+ * compilation flags and the use of kernel_fpu_begin/end functions; ideally, we
+ * want to avoid spreading FPU access across multiple files. With this idea in
+ * mind, this file aims to centralize all DCN20 and DCN2.1 (DCN2x) functions
+ * that require FPU access in a single place. Code in this file follows the
+ * following code pattern:
+ *
+ * 1. Functions that use FPU operations should be isolated in static functions.
+ * 2. The FPU functions should have the noinline attribute to ensure anything
+ * that deals with FP register is contained within this call.
+ * 3. All function that needs to be accessed outside this file requires a
+ * public interface that not uses any FPU reference.
+ */
+
+void dcn20_populate_dml_writeback_from_context(struct dc *dc,
+ struct resource_context *res_ctx,
+ display_e2e_pipe_params_st *pipes)
+{
+ int pipe_cnt, i;
+
+ for (i = 0, pipe_cnt = 0; i < dc->res_pool->pipe_count; i++) {
+ struct dc_writeback_info *wb_info = &res_ctx->pipe_ctx[i].stream->writeback_info[0];
+
+ if (!res_ctx->pipe_ctx[i].stream)
+ continue;
+
+ /* Set writeback information */
+ pipes[pipe_cnt].dout.wb_enable = (wb_info->wb_enabled == true) ? 1 : 0;
+ pipes[pipe_cnt].dout.num_active_wb++;
+ pipes[pipe_cnt].dout.wb.wb_src_height = wb_info->dwb_params.cnv_params.crop_height;
+ pipes[pipe_cnt].dout.wb.wb_src_width = wb_info->dwb_params.cnv_params.crop_width;
+ pipes[pipe_cnt].dout.wb.wb_dst_width = wb_info->dwb_params.dest_width;
+ pipes[pipe_cnt].dout.wb.wb_dst_height = wb_info->dwb_params.dest_height;
+ pipes[pipe_cnt].dout.wb.wb_htaps_luma = 1;
+ pipes[pipe_cnt].dout.wb.wb_vtaps_luma = 1;
+ pipes[pipe_cnt].dout.wb.wb_htaps_chroma = wb_info->dwb_params.scaler_taps.h_taps_c;
+ pipes[pipe_cnt].dout.wb.wb_vtaps_chroma = wb_info->dwb_params.scaler_taps.v_taps_c;
+ pipes[pipe_cnt].dout.wb.wb_hratio = 1.0;
+ pipes[pipe_cnt].dout.wb.wb_vratio = 1.0;
+ if (wb_info->dwb_params.out_format == dwb_scaler_mode_yuv420) {
+ if (wb_info->dwb_params.output_depth == DWB_OUTPUT_PIXEL_DEPTH_8BPC)
+ pipes[pipe_cnt].dout.wb.wb_pixel_format = dm_420_8;
+ else
+ pipes[pipe_cnt].dout.wb.wb_pixel_format = dm_420_10;
+ } else {
+ pipes[pipe_cnt].dout.wb.wb_pixel_format = dm_444_32;
+ }
+
+ pipe_cnt++;
+ }
+}
diff --git a/drivers/gpu/drm/amd/display/dc/fpu_operations/dcn2x.h b/drivers/gpu/drm/amd/display/dc/fpu_operations/dcn2x.h
new file mode 100644
index 000000000000..c060f909164b
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/fpu_operations/dcn2x.h
@@ -0,0 +1,33 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright 2021 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 __DCN2X_H__
+#define __DCN2X_H__
+
+void dcn20_populate_dml_writeback_from_context(struct dc *dc,
+ struct resource_context *res_ctx, display_e2e_pipe_params_st *pipes);
+
+#endif /* __DCN2X_H__ */
