76 lines
2.9 KiB
Diff
76 lines
2.9 KiB
Diff
From 6cd3a114e90c1b9be60871d2a324d71386f9ae6b Mon Sep 17 00:00:00 2001
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From: Kevin Holm <kevin@holm.dev>
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Date: Mon, 29 Jul 2024 20:03:54 +0200
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Subject: [PATCH] Revert "drm/amd/display: Add timing pixel encoding for mst
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mode validation"
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This reverts commit 4df96ba66760345471a85ef7bb29e1cd4e956057.
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[Why] The commit caused some external displays to not show any image when
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connected through a usb-c hub.
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[How] Manually solved the merge conflict by removing everything git marked
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belonging to v6.10.2 and adding everything git marked to belong to the
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version before the problem commit.
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Link: https://lore.kernel.org/stable/fd8ece71459cd79f669efcfd25e4ce38b80d4164@holm.dev/T/#t
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---
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.../display/amdgpu_dm/amdgpu_dm_mst_types.c | 33 +++----------------
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1 file changed, 5 insertions(+), 28 deletions(-)
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diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
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index a5e1a93ddaea..5c555a37e367 100644
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--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
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+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
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@@ -1599,7 +1599,7 @@ enum dc_status dm_dp_mst_is_port_support_mode(
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struct amdgpu_dm_connector *aconnector,
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struct dc_stream_state *stream)
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{
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- int pbn, branch_max_throughput_mps = 0;
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+ int bpp, pbn, branch_max_throughput_mps = 0;
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struct dc_link_settings cur_link_settings;
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unsigned int end_to_end_bw_in_kbps = 0;
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unsigned int upper_link_bw_in_kbps = 0, down_link_bw_in_kbps = 0;
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@@ -1649,34 +1649,11 @@ enum dc_status dm_dp_mst_is_port_support_mode(
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}
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}
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} else {
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- /* Check if mode could be supported within max slot
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- * number of current mst link and full_pbn of mst links.
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- */
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- int pbn_div, slot_num, max_slot_num;
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- enum dc_link_encoding_format link_encoding;
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- uint32_t stream_kbps =
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- dc_bandwidth_in_kbps_from_timing(&stream->timing,
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- dc_link_get_highest_encoding_format(stream->link));
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-
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- pbn = kbps_to_peak_pbn(stream_kbps);
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- pbn_div = dm_mst_get_pbn_divider(stream->link);
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- slot_num = DIV_ROUND_UP(pbn, pbn_div);
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-
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- link_encoding = dc_link_get_highest_encoding_format(stream->link);
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- if (link_encoding == DC_LINK_ENCODING_DP_8b_10b)
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- max_slot_num = 63;
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- else if (link_encoding == DC_LINK_ENCODING_DP_128b_132b)
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- max_slot_num = 64;
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- else {
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- DRM_DEBUG_DRIVER("Invalid link encoding format\n");
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+ /* check if mode could be supported within full_pbn */
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+ bpp = convert_dc_color_depth_into_bpc(stream->timing.display_color_depth) * 3;
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+ pbn = drm_dp_calc_pbn_mode(stream->timing.pix_clk_100hz / 10, bpp << 4);
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+ if (pbn > aconnector->mst_output_port->full_pbn)
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return DC_FAIL_BANDWIDTH_VALIDATE;
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- }
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-
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- if (slot_num > max_slot_num ||
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- pbn > aconnector->mst_output_port->full_pbn) {
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- DRM_DEBUG_DRIVER("Mode can not be supported within mst links!");
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- return DC_FAIL_BANDWIDTH_VALIDATE;
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- }
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}
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/* check is mst dsc output bandwidth branch_overall_throughput_0_mps */
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--
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2.45.2
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