1 files changed, 260 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource_helpers.c b/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource_helpers.c
new file mode 100644
index 000000000000..e001f6d1f6c3
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource_helpers.c
@@ -0,0 +1,260 @@
+/*
+ * Copyright 2022 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
+ *
+ */
+
+// header file of functions being implemented
+#include "dcn32_resource.h"
+#include "dcn20/dcn20_resource.h"
+/**
+ * ********************************************************************************************
+ * dcn32_helper_populate_phantom_dlg_params: Get DLG params for phantom pipes and populate pipe_ctx
+ * with those params.
+ *
+ * This function must be called AFTER the phantom pipes are added to context and run through DML
+ * (so that the DLG params for the phantom pipes can be populated), and BEFORE we program the
+ * timing for the phantom pipes.
+ *
+ * @param [in] dc: current dc state
+ * @param [in] context: new dc state
+ * @param [in] pipes: DML pipe params array
+ * @param [in] pipe_cnt: DML pipe count
+ *
+ * @return: void
+ *
+ * ********************************************************************************************
+ */
+void dcn32_helper_populate_phantom_dlg_params(struct dc *dc,
+		struct dc_state *context,
+		display_e2e_pipe_params_st *pipes,
+		int pipe_cnt)
+{
+	uint32_t i, pipe_idx;
+	for (i = 0, pipe_idx = 0; i < dc->res_pool->pipe_count; i++) {
+		struct pipe_ctx *pipe = &context->res_ctx.pipe_ctx[i];
+		if (!pipe->stream)
+			continue;
+
+		if (pipe->plane_state && pipe->stream->mall_stream_config.type == SUBVP_PHANTOM) {
+			pipes[pipe_idx].pipe.dest.vstartup_start = get_vstartup(&context->bw_ctx.dml, pipes, pipe_cnt,
+					pipe_idx);
+			pipes[pipe_idx].pipe.dest.vupdate_offset = get_vupdate_offset(&context->bw_ctx.dml, pipes, pipe_cnt,
+					pipe_idx);
+			pipes[pipe_idx].pipe.dest.vupdate_width = get_vupdate_width(&context->bw_ctx.dml, pipes, pipe_cnt,
+					pipe_idx);
+			pipes[pipe_idx].pipe.dest.vready_offset = get_vready_offset(&context->bw_ctx.dml, pipes, pipe_cnt,
+					pipe_idx);
+			pipe->pipe_dlg_param = pipes[pipe_idx].pipe.dest;
+		}
+		pipe_idx++;
+	}
+}
+
+/**
+ * ********************************************************************************************
+ * dcn32_helper_calculate_num_ways_for_subvp: Calculate number of ways needed for SubVP
+ *
+ * This function first checks the bytes required per pixel on the SubVP pipe, then calculates
+ * the total number of pixels required in the SubVP MALL region. These are used to calculate
+ * the number of cache lines used (then number of ways required) for SubVP MCLK switching.
+ *
+ * @param [in] dc: current dc state
+ * @param [in] context: new dc state
+ *
+ * @return: number of ways required for SubVP
+ *
+ * ********************************************************************************************
+ */
+uint32_t dcn32_helper_calculate_num_ways_for_subvp(struct dc *dc, struct dc_state *context)
+{
+	uint32_t num_ways = 0;
+	uint32_t mall_region_pixels = 0;
+	uint32_t bytes_per_pixel = 0;
+	uint32_t cache_lines_used = 0;
+	uint32_t lines_per_way = 0;
+	uint32_t total_cache_lines = 0;
+	uint32_t i = 0;
+
+	for (i = 0; i < dc->res_pool->pipe_count; i++) {
+		struct pipe_ctx *pipe = &context->res_ctx.pipe_ctx[i];
+
+		// Find the phantom pipes
+		if (pipe->stream && pipe->plane_state && !pipe->top_pipe &&
+				pipe->stream->mall_stream_config.type == SUBVP_PHANTOM) {
+			bytes_per_pixel = pipe->plane_state->format >= SURFACE_PIXEL_FORMAT_GRPH_ARGB16161616 ? 8 : 4;
+			mall_region_pixels = pipe->stream->timing.h_addressable * pipe->stream->timing.v_addressable;
+			// cache lines used is total bytes / cache_line size. Add +2 for worst case alignment
+			// (MALL is 64-byte aligned)
+			cache_lines_used += (bytes_per_pixel * mall_region_pixels) / dc->caps.cache_line_size + 2;
+		}
+	}
+
+	total_cache_lines = dc->caps.max_cab_allocation_bytes / dc->caps.cache_line_size;
+	lines_per_way = total_cache_lines / dc->caps.cache_num_ways;
+	num_ways = cache_lines_used / lines_per_way;
+	if (cache_lines_used % lines_per_way > 0)
+		num_ways++;
+
+	return num_ways;
+}
+
+void dcn32_merge_pipes_for_subvp(struct dc *dc,
+		struct dc_state *context)
+{
+	uint32_t i;
+
+	/* merge pipes if necessary */
+	for (i = 0; i < dc->res_pool->pipe_count; i++) {
+		struct pipe_ctx *pipe = &context->res_ctx.pipe_ctx[i];
+
+		// For now merge all pipes for SubVP since pipe split case isn't supported yet
+
+		/* if ODM merge we ignore mpc tree, mpo pipes will have their own flags */
+		if (pipe->prev_odm_pipe) {
+			/*split off odm pipe*/
+			pipe->prev_odm_pipe->next_odm_pipe = pipe->next_odm_pipe;
+			if (pipe->next_odm_pipe)
+				pipe->next_odm_pipe->prev_odm_pipe = pipe->prev_odm_pipe;
+
+			pipe->bottom_pipe = NULL;
+			pipe->next_odm_pipe = NULL;
+			pipe->plane_state = NULL;
+			pipe->stream = NULL;
+			pipe->top_pipe = NULL;
+			pipe->prev_odm_pipe = NULL;
+			if (pipe->stream_res.dsc)
+				dcn20_release_dsc(&context->res_ctx, dc->res_pool, &pipe->stream_res.dsc);
+			memset(&pipe->plane_res, 0, sizeof(pipe->plane_res));
+			memset(&pipe->stream_res, 0, sizeof(pipe->stream_res));
+		} else if (pipe->top_pipe && pipe->top_pipe->plane_state == pipe->plane_state) {
+			struct pipe_ctx *top_pipe = pipe->top_pipe;
+			struct pipe_ctx *bottom_pipe = pipe->bottom_pipe;
+
+			top_pipe->bottom_pipe = bottom_pipe;
+			if (bottom_pipe)
+				bottom_pipe->top_pipe = top_pipe;
+
+			pipe->top_pipe = NULL;
+			pipe->bottom_pipe = NULL;
+			pipe->plane_state = NULL;
+			pipe->stream = NULL;
+			memset(&pipe->plane_res, 0, sizeof(pipe->plane_res));
+			memset(&pipe->stream_res, 0, sizeof(pipe->stream_res));
+		}
+	}
+}
+
+bool dcn32_all_pipes_have_stream_and_plane(struct dc *dc,
+		struct dc_state *context)
+{
+	uint32_t i;
+
+	for (i = 0; i < dc->res_pool->pipe_count; i++) {
+		struct pipe_ctx *pipe = &context->res_ctx.pipe_ctx[i];
+
+		if (!pipe->stream)
+			continue;
+
+		if (!pipe->plane_state)
+			return false;
+	}
+	return true;
+}
+
+bool dcn32_subvp_in_use(struct dc *dc,
+		struct dc_state *context)
+{
+	uint32_t i;
+
+	for (i = 0; i < dc->res_pool->pipe_count; i++) {
+		struct pipe_ctx *pipe = &context->res_ctx.pipe_ctx[i];
+
+		if (pipe->stream && pipe->stream->mall_stream_config.type != SUBVP_NONE)
+			return true;
+	}
+	return false;
+}
+
+/* For MPO we adjust the DET allocation to ensure we have enough DET buffer when an MPO pipe
+ * is removed. For example for 1 MPO + 1 non-MPO normally we would allocate 6 DET segments
+ * for each pipe [6, 6, 6]. But when transitioning out of MPO it would change from
+ * [6, 6, 6] -> [9, 9]. However, if VUPDATE for the non-MPO pipe comes first we would be
+ * trying to allocate more DET than what's currently available which would result in underflow.
+ *
+ * In this case we must ensure there is enough buffer when transitioning in and out of MPO:
+ *
+ * 1 MPO (2 plane) + 1 non-MPO case:
+ * [4, 4, 9]<->[9, 9]: Allocate 4 each for MPO pipes, and maintain 9 for non-MPO pipe
+ *
+ * 1 MPO (2 plane) + 2 non-MPO case:
+ * [3, 3, 5, 5]<->[6, 6, 6]
+ *
+ * 1 MPO (3 plane) + 1 non-MPO case:
+ * [3, 3, 3, 9]<->[4, 4, 9] or [3, 3, 3, 6]<->[9, 9]
+ *
+ * For multi-display MPO case all pipes will have 4 segments:
+ * Removing MPO on one of the displays will result in 3 pipes
+ * (1 MPO and 1 non-MPO which is covered by single MPO stream case).
+ */
+void dcn32_update_det_override_for_mpo(struct dc *dc, struct dc_state *context,
+	display_e2e_pipe_params_st *pipes)
+{
+	uint8_t i, mpo_stream_index, pipe_cnt;
+	uint8_t mpo_stream_count = 0;
+	uint8_t mpo_planes = 0; // Only used in single display MPO case
+	unsigned int j;
+	struct resource_context *res_ctx = &context->res_ctx;
+
+	for (i = 0; i < context->stream_count; i++) {
+		if (context->stream_status[i].plane_count > 1) {
+			mpo_stream_index = i;
+			mpo_stream_count++;
+			mpo_planes = context->stream_status[i].plane_count;
+		}
+	}
+
+	if (mpo_stream_count == 1) {
+		for (j = 0, pipe_cnt = 0; j < dc->res_pool->pipe_count; j++) {
+			if (!res_ctx->pipe_ctx[j].stream)
+				continue;
+
+			if (context->res_ctx.pipe_ctx[j].stream == context->streams[mpo_stream_index]) {
+				// For 3 plane MPO + 1 non-MPO, do [3, 3, 3, 9]
+				// For 2 plane MPO + 1 non-MPO, do [4, 4, 9]
+				if (context->stream_count - mpo_stream_count == 1)
+					pipes[pipe_cnt].pipe.src.det_size_override = DCN3_2_DET_SEG_SIZE * (mpo_planes == 2 ? 4 : 3);
+				else if (context->stream_count - mpo_stream_count == 2)
+					pipes[pipe_cnt].pipe.src.det_size_override = DCN3_2_DET_SEG_SIZE * 3;
+
+			} else if (context->res_ctx.pipe_ctx[j].stream &&
+					context->res_ctx.pipe_ctx[j].stream != context->streams[mpo_stream_index]) {
+				// Update for non-MPO pipes
+				if (context->stream_count - mpo_stream_count == 1)
+					pipes[pipe_cnt].pipe.src.det_size_override = DCN3_2_DET_SEG_SIZE * 9;
+				else if (context->stream_count - mpo_stream_count == 2)
+					pipes[pipe_cnt].pipe.src.det_size_override = DCN3_2_DET_SEG_SIZE * 5;
+			}
+			pipe_cnt++;
+		}
+	}
+}