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From baf6ccf672f8582f50586a32f7576e32e4eee72d Mon Sep 17 00:00:00 2001
From: "Jerry (Fangzhi) Zuo" <Jerry.Zuo@amd.com>
Date: Fri, 5 Jan 2018 16:35:54 -0500
Subject: [PATCH 3053/4131] drm/amd/display: Fixed MST display doesn't light up
Need to take care of DRM interface prior to 4.12 kernel.
Signed-off-by: Jerry (Fangzhi) Zuo <Jerry.Zuo@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Acked-by: Junwei Zhang <Jerry.Zhang@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
---
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
index f56f2f7..1f9fbf4 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
@@ -233,8 +233,12 @@ bool dm_helpers_dp_mst_write_payload_allocation_table(
pbn = drm_dp_calc_pbn_mode(clock, bpp);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 12, 0)
slots = drm_dp_find_vcpi_slots(mst_mgr, pbn);
ret = drm_dp_mst_allocate_vcpi(mst_mgr, mst_port, pbn, slots);
+#else
+ ret = drm_dp_mst_allocate_vcpi(mst_mgr, mst_port, pbn, &slots);
+#endif
if (!ret)
return false;
--
2.7.4
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