This is a note to let you know that I've just added the patch titled
drm/i915/dp_mst: Add the MST topology state for modesetted CRTCs
to the 6.1-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-i915-dp_mst-add-the-mst-topology-state-for-modesetted-crtcs.patch
and it can be found in the queue-6.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 326b1e792ff08b4d8ecb9605aec98e4e5feef56e Mon Sep 17 00:00:00 2001
From: Imre Deak <imre.deak@xxxxxxxxx>
Date: Mon, 6 Feb 2023 13:48:53 +0200
Subject: drm/i915/dp_mst: Add the MST topology state for modesetted CRTCs
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From: Imre Deak <imre.deak@xxxxxxxxx>
commit 326b1e792ff08b4d8ecb9605aec98e4e5feef56e upstream.
Add the MST topology for a CRTC to the atomic state if the driver
needs to force a modeset on the CRTC after the encoder compute config
functions are called.
Later the MST encoder's disable hook also adds the state, but that isn't
guaranteed to work (since in that hook getting the state may fail, which
can't be handled there). This should fix that, while a later patch fixes
the use of the MST state in the disable hook.
v2: Add missing forward struct declartions, caught by hdrtest.
v3: Factor out intel_dp_mst_add_topology_state_for_connector() used
later in the patchset.
Cc: Lyude Paul <lyude@xxxxxxxxxx>
Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx # 6.1
Reviewed-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> # v2
Reviewed-by: Lyude Paul <lyude@xxxxxxxxxx>
Acked-by: Lyude Paul <lyude@xxxxxxxxxx>
Acked-by: Daniel Vetter <daniel@xxxxxxxx>
Acked-by: Wayne Lin <wayne.lin@xxxxxxx>
Acked-by: Jani Nikula <jani.nikula@xxxxxxxxx>
Signed-off-by: Imre Deak <imre.deak@xxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20230206114856.2665066-1-imre.deak@xxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_display.c | 4 +
drivers/gpu/drm/i915/display/intel_dp_mst.c | 61 +++++++++++++++++++++++++++
drivers/gpu/drm/i915/display/intel_dp_mst.h | 4 +
3 files changed, 69 insertions(+)
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -5969,6 +5969,10 @@ int intel_modeset_all_pipes(struct intel
if (ret)
return ret;
+ ret = intel_dp_mst_add_topology_state_for_crtc(state, crtc);
+ if (ret)
+ return ret;
+
ret = intel_atomic_add_affected_planes(state, crtc);
if (ret)
return ret;
--- a/drivers/gpu/drm/i915/display/intel_dp_mst.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c
@@ -1003,3 +1003,64 @@ bool intel_dp_mst_is_slave_trans(const s
return crtc_state->mst_master_transcoder != INVALID_TRANSCODER &&
crtc_state->mst_master_transcoder != crtc_state->cpu_transcoder;
}
+
+/**
+ * intel_dp_mst_add_topology_state_for_connector - add MST topology state for a connector
+ * @state: atomic state
+ * @connector: connector to add the state for
+ * @crtc: the CRTC @connector is attached to
+ *
+ * Add the MST topology state for @connector to @state.
+ *
+ * Returns 0 on success, negative error code on failure.
+ */
+static int
+intel_dp_mst_add_topology_state_for_connector(struct intel_atomic_state *state,
+ struct intel_connector *connector,
+ struct intel_crtc *crtc)
+{
+ struct drm_dp_mst_topology_state *mst_state;
+
+ if (!connector->mst_port)
+ return 0;
+
+ mst_state = drm_atomic_get_mst_topology_state(&state->base,
+ &connector->mst_port->mst_mgr);
+ if (IS_ERR(mst_state))
+ return PTR_ERR(mst_state);
+
+ mst_state->pending_crtc_mask |= drm_crtc_mask(&crtc->base);
+
+ return 0;
+}
+
+/**
+ * intel_dp_mst_add_topology_state_for_crtc - add MST topology state for a CRTC
+ * @state: atomic state
+ * @crtc: CRTC to add the state for
+ *
+ * Add the MST topology state for @crtc to @state.
+ *
+ * Returns 0 on success, negative error code on failure.
+ */
+int intel_dp_mst_add_topology_state_for_crtc(struct intel_atomic_state *state,
+ struct intel_crtc *crtc)
+{
+ struct drm_connector *_connector;
+ struct drm_connector_state *conn_state;
+ int i;
+
+ for_each_new_connector_in_state(&state->base, _connector, conn_state, i) {
+ struct intel_connector *connector = to_intel_connector(_connector);
+ int ret;
+
+ if (conn_state->crtc != &crtc->base)
+ continue;
+
+ ret = intel_dp_mst_add_topology_state_for_connector(state, connector, crtc);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
--- a/drivers/gpu/drm/i915/display/intel_dp_mst.h
+++ b/drivers/gpu/drm/i915/display/intel_dp_mst.h
@@ -8,6 +8,8 @@
#include <linux/types.h>
+struct intel_atomic_state;
+struct intel_crtc;
struct intel_crtc_state;
struct intel_digital_port;
struct intel_dp;
@@ -18,5 +20,7 @@ int intel_dp_mst_encoder_active_links(st
bool intel_dp_mst_is_master_trans(const struct intel_crtc_state *crtc_state);
bool intel_dp_mst_is_slave_trans(const struct intel_crtc_state *crtc_state);
bool intel_dp_mst_source_support(struct intel_dp *intel_dp);
+int intel_dp_mst_add_topology_state_for_crtc(struct intel_atomic_state *state,
+ struct intel_crtc *crtc);
#endif /* __INTEL_DP_MST_H__ */
Patches currently in stable-queue which might be from imre.deak@xxxxxxxxx are
queue-6.1/drm-i915-dp_mst-add-the-mst-topology-state-for-modesetted-crtcs.patch
queue-6.1/drm-display-dp_mst-fix-down-message-handling-after-a-packet-reception-error.patch
queue-6.1/drm-display-dp_mst-fix-down-up-message-handling-after-sink-disconnect.patch
queue-6.1/drm-i915-fix-system-suspend-without-fbdev-being-initialized.patch
queue-6.1/drm-display-dp_mst-fix-payload-addition-on-a-disconnected-sink.patch
queue-6.1/drm-display-dp_mst-add-drm_atomic_get_old_mst_topology_state.patch
