drm/amd/display: Phase 1 Add Bw Allocation source and header files

[WHY]
To implement BW Allocation as per USB4 spec chapter 10.7

[HOW]
Implement the DP-Tx portion of the logic to interact with DPIA

Reviewed-by: Wenjing Liu <Wenjing.Liu@amd.com>
Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Brian Chang <Brian.Chang@amd.com>
Signed-off-by: Mustapha Ghaddar <mghaddar@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/display/dc/dc_link.h b/drivers/gpu/drm/amd/display/dc/dc_link.h
index dc6afe33bca2..2e18bcf6b11a 100644
--- a/drivers/gpu/drm/amd/display/dc/dc_link.h
+++ b/drivers/gpu/drm/amd/display/dc/dc_link.h
@@ -151,6 +151,20 @@ struct dc_panel_config {
 		bool optimize_edp_link_rate; /* eDP ILR */
 	} ilr;
 };
+
+/*
+ *  USB4 DPIA BW ALLOCATION STRUCTS
+ */
+struct dc_dpia_bw_alloc {
+	int sink_verified_bw;  // The Verified BW that sink can allocated and use that has been verified already
+	int sink_allocated_bw; // The Actual Allocated BW that sink currently allocated
+	int padding_bw;        // The Padding "Un-used" BW allocated by CM for padding reasons
+	int sink_max_bw;       // The Max BW that sink can require/support
+	int estimated_bw;      // The estimated available BW for this DPIA
+	int bw_granularity;    // BW Granularity
+	bool bw_alloc_enabled; // The BW Alloc Mode Support is turned ON for all 3:  DP-Tx & Dpia & CM
+};
+
 /*
  * A link contains one or more sinks and their connected status.
  * The currently active signal type (HDMI, DP-SST, DP-MST) is also reported.