linux-kernel - [PATCH 4.4 02/46] drm/dp/mst: save vcpi with payloads

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Date:   Thu, 19 Oct 2017 15:48:38 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Harry Wentland <harry.wentland@....com>,
        Alex Deucher <alexander.deucher@....com>,
        Daniel Vetter <daniel.vetter@...ll.ch>,
        Kai Heng Feng <kai.heng.feng@...onical.com>
Subject: [PATCH 4.4 02/46] drm/dp/mst: save vcpi with payloads

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Harry Wentland <harry.wentland@....com>

commit 6cecdf7a161d2b909dc7c8979176bbc4f0669968 upstream.

This makes it possibly for drivers to find the associated
mst_port by looking at the payload allocation table.

Signed-off-by: Harry Wentland <harry.wentland@....com>
Reviewed-by: Alex Deucher <alexander.deucher@....com>
Link: http://patchwork.freedesktop.org/patch/msgid/1449514552-10236-3-git-send-email-harry.wentland@amd.com
Signed-off-by: Daniel Vetter <daniel.vetter@...ll.ch>
Cc: Kai Heng Feng <kai.heng.feng@...onical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/gpu/drm/drm_dp_mst_topology.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/gpu/drm/drm_dp_mst_topology.c
+++ b/drivers/gpu/drm/drm_dp_mst_topology.c
@@ -1802,6 +1802,7 @@ int drm_dp_update_payload_part1(struct d
 				return -EINVAL;
 			}
 			req_payload.num_slots = mgr->proposed_vcpis[i]->num_slots;
+			req_payload.vcpi = mgr->proposed_vcpis[i]->vcpi;
 		} else {
 			port = NULL;
 			req_payload.num_slots = 0;
@@ -1817,6 +1818,7 @@ int drm_dp_update_payload_part1(struct d
 			if (req_payload.num_slots) {
 				drm_dp_create_payload_step1(mgr, mgr->proposed_vcpis[i]->vcpi, &req_payload);
 				mgr->payloads[i].num_slots = req_payload.num_slots;
+				mgr->payloads[i].vcpi = req_payload.vcpi;
 			} else if (mgr->payloads[i].num_slots) {
 				mgr->payloads[i].num_slots = 0;
 				drm_dp_destroy_payload_step1(mgr, port, mgr->payloads[i].vcpi, &mgr->payloads[i]);