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Message-Id: <20211025223029.300891-5-lyude@redhat.com>
Date: Mon, 25 Oct 2021 18:30:28 -0400
From: Lyude Paul <lyude@...hat.com>
To: dri-devel@...ts.freedesktop.org, amdgfx@...ts.freedesktop.org
Cc: Bhawanpreet Lakha <Bhawanpreet.Lakha@....com>,
"Lin, Wayne" <Wayne.Lin@....com>,
Harry Wentland <harry.wentland@....com>,
Leo Li <sunpeng.li@....com>,
Alex Deucher <alexander.deucher@....com>,
Christian König <christian.koenig@....com>,
"Pan, Xinhui" <Xinhui.Pan@....com>,
David Airlie <airlied@...ux.ie>,
Daniel Vetter <daniel@...ll.ch>,
Nicholas Kazlauskas <nicholas.kazlauskas@....com>,
Rodrigo Siqueira <Rodrigo.Siqueira@....com>,
Qingqing Zhuo <qingqing.zhuo@....com>,
Simon Ser <contact@...rsion.fr>,
Bas Nieuwenhuizen <bas@...nieuwenhuizen.nl>,
Aurabindo Pillai <aurabindo.pillai@....com>,
Jude Shih <shenshih@....com>,
Nikola Cornij <nikola.cornij@....com>,
Roman Li <Roman.Li@....com>,
Mikita Lipski <mikita.lipski@....com>,
Anson Jacob <Anson.Jacob@....com>,
Eryk Brol <eryk.brol@....com>,
Stylon Wang <stylon.wang@....com>,
Victor Lu <victorchengchi.lu@....com>,
Nirmoy Das <nirmoy.das@....com>,
Sean Paul <seanpaul@...omium.org>,
Fernando Ramos <greenfoo@....eu>,
Fangzhi Zuo <Jerry.Zuo@....com>,
"Leo (Hanghong) Ma" <hanghong.ma@....com>,
Colin Ian King <colin.king@...onical.com>,
Zhan Liu <zhan.liu@....com>, Bing Guo <bing.guo@....com>,
amd-gfx@...ts.freedesktop.org (open list:AMD DISPLAY CORE),
linux-kernel@...r.kernel.org (open list)
Subject: [PATCH v5 4/4] drm/amd/display: Add DP 2.0 MST DM Support
From: Bhawanpreet Lakha <Bhawanpreet.Lakha@....com>
[Why]
Add DP2 MST and debugfs support
[How]
Update the slot info based on the link encoding format
Reviewed-by: "Lin, Wayne" <Wayne.Lin@....com>
Signed-off-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@....com>
Signed-off-by: Fangzhi Zuo <Jerry.Zuo@....com>
Signed-off-by: Lyude Paul <lyude@...hat.com>
---
.../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 29 +++++++++++++++++++
.../amd/display/amdgpu_dm/amdgpu_dm_debugfs.c | 3 ++
.../amd/display/amdgpu_dm/amdgpu_dm_helpers.c | 5 +++-
3 files changed, 36 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index f35561b5a465..ecdeeedb1cde 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -10684,6 +10684,8 @@ static int amdgpu_dm_atomic_check(struct drm_device *dev,
#if defined(CONFIG_DRM_AMD_DC_DCN)
struct dsc_mst_fairness_vars vars[MAX_PIPES];
#endif
+ struct drm_dp_mst_topology_state *mst_state;
+ struct drm_dp_mst_topology_mgr *mgr;
trace_amdgpu_dm_atomic_check_begin(state);
@@ -10891,6 +10893,33 @@ static int amdgpu_dm_atomic_check(struct drm_device *dev,
lock_and_validation_needed = true;
}
+#if defined(CONFIG_DRM_AMD_DC_DCN)
+ /* set the slot info for each mst_state based on the link encoding format */
+ for_each_new_mst_mgr_in_state(state, mgr, mst_state, i) {
+ struct amdgpu_dm_connector *aconnector;
+ struct drm_connector *connector;
+ struct drm_connector_list_iter iter;
+ u8 link_coding_cap;
+
+ if (!mgr->mst_state )
+ continue;
+
+ drm_connector_list_iter_begin(dev, &iter);
+ drm_for_each_connector_iter(connector, &iter) {
+ int id = connector->index;
+
+ if (id == mst_state->mgr->conn_base_id) {
+ aconnector = to_amdgpu_dm_connector(connector);
+ link_coding_cap = dc_link_dp_mst_decide_link_encoding_format(aconnector->dc_link);
+ drm_dp_mst_update_slots(mst_state, link_coding_cap);
+
+ break;
+ }
+ }
+ drm_connector_list_iter_end(&iter);
+
+ }
+#endif
/**
* Streams and planes are reset when there are changes that affect
* bandwidth. Anything that affects bandwidth needs to go through
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
index 814f67d86a3c..3d44896149a2 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
@@ -294,6 +294,9 @@ static ssize_t dp_link_settings_write(struct file *f, const char __user *buf,
case LINK_RATE_RBR2:
case LINK_RATE_HIGH2:
case LINK_RATE_HIGH3:
+#if defined(CONFIG_DRM_AMD_DC_DCN)
+ case LINK_RATE_UHBR10:
+#endif
break;
default:
valid_input = false;
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 6169488e2011..53b5cc7b0679 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
@@ -219,6 +219,7 @@ bool dm_helpers_dp_mst_write_payload_allocation_table(
struct drm_dp_mst_topology_mgr *mst_mgr;
struct drm_dp_mst_port *mst_port;
bool ret;
+ u8 link_coding_cap;
aconnector = (struct amdgpu_dm_connector *)stream->dm_stream_context;
/* Accessing the connector state is required for vcpi_slots allocation
@@ -238,6 +239,8 @@ bool dm_helpers_dp_mst_write_payload_allocation_table(
mst_port = aconnector->port;
+ link_coding_cap = dc_link_dp_mst_decide_link_encoding_format(aconnector->dc_link);
+
if (enable) {
ret = drm_dp_mst_allocate_vcpi(mst_mgr, mst_port,
@@ -251,7 +254,7 @@ bool dm_helpers_dp_mst_write_payload_allocation_table(
}
/* It's OK for this to fail */
- drm_dp_update_payload_part1(mst_mgr, 1);
+ drm_dp_update_payload_part1(mst_mgr, (link_coding_cap == DP_CAP_ANSI_128B132B) ? 0:1);
/* mst_mgr->->payloads are VC payload notify MST branch using DPCD or
* AUX message. The sequence is slot 1-63 allocated sequence for each
--
2.31.1
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