Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 114 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/display/dc/link/link_resource.c b/drivers/gpu/drm/amd/display/dc/link/link_resource.c
new file mode 100644
index 000000000..bd42bb273
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/link/link_resource.c
@@ -0,0 +1,114 @@
+/*
+ * Copyright 2023 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
+ *
+ */
+/* FILE POLICY AND INTENDED USAGE:
+ * This file implements accessors to link resource.
+ */
+
+#include "link_resource.h"
+#include "protocols/link_dp_capability.h"
+
+void link_get_cur_link_res(const struct dc_link *link,
+		struct link_resource *link_res)
+{
+	int i;
+	struct pipe_ctx *pipe = NULL;
+
+	memset(link_res, 0, sizeof(*link_res));
+
+	for (i = 0; i < MAX_PIPES; i++) {
+		pipe = &link->dc->current_state->res_ctx.pipe_ctx[i];
+		if (pipe->stream && pipe->stream->link && pipe->top_pipe == NULL) {
+			if (pipe->stream->link == link) {
+				*link_res = pipe->link_res;
+				break;
+			}
+		}
+	}
+
+}
+
+void link_get_cur_res_map(const struct dc *dc, uint32_t *map)
+{
+	struct dc_link *link;
+	uint32_t i;
+	uint32_t hpo_dp_recycle_map = 0;
+
+	*map = 0;
+
+	if (dc->caps.dp_hpo) {
+		for (i = 0; i < dc->caps.max_links; i++) {
+			link = dc->links[i];
+			if (link->link_status.link_active &&
+					link_dp_get_encoding_format(&link->reported_link_cap) == DP_128b_132b_ENCODING &&
+					link_dp_get_encoding_format(&link->cur_link_settings) != DP_128b_132b_ENCODING)
+				/* hpo dp link encoder is considered as recycled, when RX reports 128b/132b encoding capability
+				 * but current link doesn't use it.
+				 */
+				hpo_dp_recycle_map |= (1 << i);
+		}
+		*map |= (hpo_dp_recycle_map << LINK_RES_HPO_DP_REC_MAP__SHIFT);
+	}
+}
+
+void link_restore_res_map(const struct dc *dc, uint32_t *map)
+{
+	struct dc_link *link;
+	uint32_t i;
+	unsigned int available_hpo_dp_count;
+	uint32_t hpo_dp_recycle_map = (*map & LINK_RES_HPO_DP_REC_MAP__MASK)
+			>> LINK_RES_HPO_DP_REC_MAP__SHIFT;
+
+	if (dc->caps.dp_hpo) {
+		available_hpo_dp_count = dc->res_pool->hpo_dp_link_enc_count;
+		/* remove excess 128b/132b encoding support for not recycled links */
+		for (i = 0; i < dc->caps.max_links; i++) {
+			if ((hpo_dp_recycle_map & (1 << i)) == 0) {
+				link = dc->links[i];
+				if (link->type != dc_connection_none &&
+						link_dp_get_encoding_format(&link->verified_link_cap) == DP_128b_132b_ENCODING) {
+					if (available_hpo_dp_count > 0)
+						available_hpo_dp_count--;
+					else
+						/* remove 128b/132b encoding capability by limiting verified link rate to HBR3 */
+						link->verified_link_cap.link_rate = LINK_RATE_HIGH3;
+				}
+			}
+		}
+		/* remove excess 128b/132b encoding support for recycled links */
+		for (i = 0; i < dc->caps.max_links; i++) {
+			if ((hpo_dp_recycle_map & (1 << i)) != 0) {
+				link = dc->links[i];
+				if (link->type != dc_connection_none &&
+						link_dp_get_encoding_format(&link->verified_link_cap) == DP_128b_132b_ENCODING) {
+					if (available_hpo_dp_count > 0)
+						available_hpo_dp_count--;
+					else
+						/* remove 128b/132b encoding capability by limiting verified link rate to HBR3 */
+						link->verified_link_cap.link_rate = LINK_RATE_HIGH3;
+				}
+			}
+		}
+	}
+}