This is a note to let you know that I've just added the patch titled
drm/display/dp_mst: Handle old/new payload states in drm_dp_remove_payload()
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-display-dp_mst-handle-old-new-payload-states-in-drm_dp_remove_payload.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 e761cc20946a0094df71cb31a565a6a0d03bd8be Mon Sep 17 00:00:00 2001
From: Imre Deak <imre.deak@xxxxxxxxx>
Date: Mon, 6 Feb 2023 13:48:54 +0200
Subject: drm/display/dp_mst: Handle old/new payload states in drm_dp_remove_payload()
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From: Imre Deak <imre.deak@xxxxxxxxx>
commit e761cc20946a0094df71cb31a565a6a0d03bd8be upstream.
Atm, drm_dp_remove_payload() uses the same payload state to both get the
vc_start_slot required for the payload removal DPCD message and to
deduct time_slots from vc_start_slot of all payloads after the one being
removed.
The above isn't always correct, as vc_start_slot must be the up-to-date
version contained in the new payload state, but time_slots must be the
one used when the payload was previously added, contained in the old
payload state. The new payload's time_slots can change vs. the old one
if the current atomic commit changes the corresponding mode.
This patch let's drivers pass the old and new payload states to
drm_dp_remove_payload(), but keeps these the same for now in all drivers
not to change the behavior. A follow-up i915 patch will pass in that
driver the correct old and new states to the function.
Cc: Lyude Paul <lyude@xxxxxxxxxx>
Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Cc: Ben Skeggs <bskeggs@xxxxxxxxxx>
Cc: Karol Herbst <kherbst@xxxxxxxxxx>
Cc: Harry Wentland <harry.wentland@xxxxxxx>
Cc: Alex Deucher <alexander.deucher@xxxxxxx>
Cc: Wayne Lin <Wayne.Lin@xxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx # 6.1
Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
Reviewed-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
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/20230206114856.2665066-2-imre.deak@xxxxxxxxx
Hand modified for missing 8c7d980da9ba3eb67a1b40fd4b33bcf49397084b
Signed-off-by: Mario Limonciello <mario.limonciello@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c | 2 -
drivers/gpu/drm/display/drm_dp_mst_topology.c | 26 +++++++-------
drivers/gpu/drm/i915/display/intel_dp_mst.c | 4 +-
drivers/gpu/drm/nouveau/dispnv50/disp.c | 2 -
include/drm/display/drm_dp_mst_helper.h | 3 +
5 files changed, 21 insertions(+), 16 deletions(-)
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
@@ -206,7 +206,7 @@ bool dm_helpers_dp_mst_write_payload_all
if (enable)
drm_dp_add_payload_part1(mst_mgr, mst_state, payload);
else
- drm_dp_remove_payload(mst_mgr, mst_state, payload);
+ drm_dp_remove_payload(mst_mgr, mst_state, payload, payload);
/* mst_mgr->->payloads are VC payload notify MST branch using DPCD or
* AUX message. The sequence is slot 1-63 allocated sequence for each
--- a/drivers/gpu/drm/display/drm_dp_mst_topology.c
+++ b/drivers/gpu/drm/display/drm_dp_mst_topology.c
@@ -3342,7 +3342,8 @@ EXPORT_SYMBOL(drm_dp_add_payload_part1);
* drm_dp_remove_payload() - Remove an MST payload
* @mgr: Manager to use.
* @mst_state: The MST atomic state
- * @payload: The payload to write
+ * @old_payload: The payload with its old state
+ * @new_payload: The payload to write
*
* Removes a payload from an MST topology if it was successfully assigned a start slot. Also updates
* the starting time slots of all other payloads which would have been shifted towards the start of
@@ -3350,36 +3351,37 @@ EXPORT_SYMBOL(drm_dp_add_payload_part1);
*/
void drm_dp_remove_payload(struct drm_dp_mst_topology_mgr *mgr,
struct drm_dp_mst_topology_state *mst_state,
- struct drm_dp_mst_atomic_payload *payload)
+ const struct drm_dp_mst_atomic_payload *old_payload,
+ struct drm_dp_mst_atomic_payload *new_payload)
{
struct drm_dp_mst_atomic_payload *pos;
bool send_remove = false;
/* We failed to make the payload, so nothing to do */
- if (payload->vc_start_slot == -1)
+ if (new_payload->vc_start_slot == -1)
return;
mutex_lock(&mgr->lock);
- send_remove = drm_dp_mst_port_downstream_of_branch(payload->port, mgr->mst_primary);
+ send_remove = drm_dp_mst_port_downstream_of_branch(new_payload->port, mgr->mst_primary);
mutex_unlock(&mgr->lock);
if (send_remove)
- drm_dp_destroy_payload_step1(mgr, mst_state, payload);
+ drm_dp_destroy_payload_step1(mgr, mst_state, new_payload);
else
drm_dbg_kms(mgr->dev, "Payload for VCPI %d not in topology, not sending remove\n",
- payload->vcpi);
+ new_payload->vcpi);
list_for_each_entry(pos, &mst_state->payloads, next) {
- if (pos != payload && pos->vc_start_slot > payload->vc_start_slot)
- pos->vc_start_slot -= payload->time_slots;
+ if (pos != new_payload && pos->vc_start_slot > new_payload->vc_start_slot)
+ pos->vc_start_slot -= old_payload->time_slots;
}
- payload->vc_start_slot = -1;
+ new_payload->vc_start_slot = -1;
mgr->payload_count--;
- mgr->next_start_slot -= payload->time_slots;
+ mgr->next_start_slot -= old_payload->time_slots;
- if (payload->delete)
- drm_dp_mst_put_port_malloc(payload->port);
+ if (new_payload->delete)
+ drm_dp_mst_put_port_malloc(new_payload->port);
}
EXPORT_SYMBOL(drm_dp_remove_payload);
--- a/drivers/gpu/drm/i915/display/intel_dp_mst.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c
@@ -366,6 +366,8 @@ static void intel_mst_disable_dp(struct
to_intel_connector(old_conn_state->connector);
struct drm_dp_mst_topology_state *mst_state =
drm_atomic_get_mst_topology_state(&state->base, &intel_dp->mst_mgr);
+ struct drm_dp_mst_atomic_payload *payload =
+ drm_atomic_get_mst_payload_state(mst_state, connector->port);
struct drm_i915_private *i915 = to_i915(connector->base.dev);
drm_dbg_kms(&i915->drm, "active links %d\n",
@@ -374,7 +376,7 @@ static void intel_mst_disable_dp(struct
intel_hdcp_disable(intel_mst->connector);
drm_dp_remove_payload(&intel_dp->mst_mgr, mst_state,
- drm_atomic_get_mst_payload_state(mst_state, connector->port));
+ payload, payload);
intel_audio_codec_disable(encoder, old_crtc_state, old_conn_state);
}
--- a/drivers/gpu/drm/nouveau/dispnv50/disp.c
+++ b/drivers/gpu/drm/nouveau/dispnv50/disp.c
@@ -1028,7 +1028,7 @@ nv50_msto_prepare(struct drm_atomic_stat
// TODO: Figure out if we want to do a better job of handling VCPI allocation failures here?
if (msto->disabled) {
- drm_dp_remove_payload(mgr, mst_state, payload);
+ drm_dp_remove_payload(mgr, mst_state, payload, payload);
} else {
if (msto->enabled)
drm_dp_add_payload_part1(mgr, mst_state, payload);
--- a/include/drm/display/drm_dp_mst_helper.h
+++ b/include/drm/display/drm_dp_mst_helper.h
@@ -841,7 +841,8 @@ int drm_dp_add_payload_part2(struct drm_
struct drm_dp_mst_atomic_payload *payload);
void drm_dp_remove_payload(struct drm_dp_mst_topology_mgr *mgr,
struct drm_dp_mst_topology_state *mst_state,
- struct drm_dp_mst_atomic_payload *payload);
+ const struct drm_dp_mst_atomic_payload *old_payload,
+ struct drm_dp_mst_atomic_payload *new_payload);
int drm_dp_check_act_status(struct drm_dp_mst_topology_mgr *mgr);
Patches currently in stable-queue which might be from imre.deak@xxxxxxxxx are
queue-6.1/drm-i915-dp_mst-fix-payload-removal-during-output-disabling.patch
queue-6.1/drm-display-dp_mst-handle-old-new-payload-states-in-drm_dp_remove_payload.patch
