From 661d331196722af9cd2a54c35328617b8921aad4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= <ville.syrjala@linux.intel.com>
Date: Fri, 22 Oct 2021 13:32:58 +0300
Subject: drm/i915: Disable all planes before modesetting any pipes
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Git-commit: 39919997322f21d367347943ffd5ba8c4007c9ae
Patch-mainline: v5.17-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225
Let's disable planes on all pipes affected by the modeset before
we start doing the actual modeset. This means we have less
random planes enabled during the modeset, and it also mirrors
what we already do when enabling pipes on skl+ since we enable
planes on all pipes as the very last step. As a bonus we also
nuke a bunch og bigjoiner special casing.
I've occasionally pondered about going even furher here and
doing the pre_plane_update() stuff for all pipes first, then
actually disabling the planes, and finally running the rest
of the modeset sequence. This would potentially allow
parallelizing all the extra vblank waits across multiple pipes,
and would make the plane disable even more atomic. But let's
go one step a time here.
Cc: José Roberto de Souza <jose.souza@intel.com>
Reviewed-by: Manasi Navare <manasi.d.navare@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211022103304.24164-4-ville.syrjala@linux.intel.com
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/i915/display/intel_display.c | 28 +++++++++-----------
1 file changed, 13 insertions(+), 15 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 093ced7f212f..cd831b28a1d8 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -8258,18 +8258,13 @@ static void intel_old_crtc_state_disables(struct intel_atomic_state *state,
drm_WARN_ON(&dev_priv->drm, old_crtc_state->bigjoiner_slave);
- intel_crtc_disable_planes(state, crtc);
-
/*
* We still need special handling for disabling bigjoiner master
* and slaves since for slave we do not have encoder or plls
* so we dont need to disable those.
*/
- if (old_crtc_state->bigjoiner) {
- intel_crtc_disable_planes(state,
- old_crtc_state->bigjoiner_linked_crtc);
+ if (old_crtc_state->bigjoiner)
old_crtc_state->bigjoiner_linked_crtc->active = false;
- }
/*
* We need to disable pipe CRC before disabling the pipe,
@@ -8295,6 +8290,18 @@ static void intel_commit_modeset_disables(struct intel_atomic_state *state)
u32 handled = 0;
int i;
+ for_each_oldnew_intel_crtc_in_state(state, crtc, old_crtc_state,
+ new_crtc_state, i) {
+ if (!intel_crtc_needs_modeset(new_crtc_state))
+ continue;
+
+ if (!old_crtc_state->hw.active)
+ continue;
+
+ intel_pre_plane_update(state, crtc);
+ intel_crtc_disable_planes(state, crtc);
+ }
+
/* Only disable port sync and MST slaves */
for_each_oldnew_intel_crtc_in_state(state, crtc, old_crtc_state,
new_crtc_state, i) {
@@ -8313,7 +8320,6 @@ static void intel_commit_modeset_disables(struct intel_atomic_state *state)
!intel_dp_mst_is_slave_trans(old_crtc_state))
continue;
- intel_pre_plane_update(state, crtc);
intel_old_crtc_state_disables(state, old_crtc_state,
new_crtc_state, crtc);
handled |= BIT(crtc->pipe);
@@ -8327,14 +8333,6 @@ static void intel_commit_modeset_disables(struct intel_atomic_state *state)
old_crtc_state->bigjoiner_slave)
continue;
- intel_pre_plane_update(state, crtc);
- if (old_crtc_state->bigjoiner) {
- struct intel_crtc *slave =
- old_crtc_state->bigjoiner_linked_crtc;
-
- intel_pre_plane_update(state, slave);
- }
-
if (old_crtc_state->hw.active)
intel_old_crtc_state_disables(state, old_crtc_state,
new_crtc_state, crtc);
--
2.38.1