From 4ff4ebac3f1378f4ba6e11fe5ad4a4ac590bb8a4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jouni=20H=C3=B6gander?= <jouni.hogander@intel.com>
Date: Mon, 24 Oct 2022 08:46:49 +0300
Subject: drm/i915/psr: Send update also on invalidate
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Alt-commit: d755f89220a2b49bc90b7b520bb6edeb4adb5f01
Git-commit: 4ff4ebac3f1378f4ba6e11fe5ad4a4ac590bb8a4
Patch-mainline: v6.1-rc5
References: git-fixes
Currently we are observing mouse cursor stuttering when using
xrandr --scaling=1.2x1.2. X scaling/transformation seems to be
doing fronbuffer rendering. When moving mouse cursor X seems to
perform several invalidates and only one DirtyFB. I.e. it seems
to be assuming updates are sent to panel while drawing is done.
Earlier we were disabling PSR in frontbuffer invalidate call back
(when drawing in X started). PSR was re-enabled in frontbuffer
flush callback (dirtyfb ioctl). This was working fine with X
scaling/transformation. Now we are just enabling continuous full
frame (cff) in PSR invalidate callback. Enabling cff doesn't
trigger any updates. It just configures PSR to send full frame
when updates are sent. I.e. there are no updates on screen before
PSR flush callback is made. X seems to be doing several updates
in frontbuffer before doing dirtyfb ioctl.
Fix this by sending single update on every invalidate callback.
Cc: José Roberto de Souza <jose.souza@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Mika Kahola <mika.kahola@intel.com>
Fixes: 805f04d42a6b ("drm/i915/display/psr: Use continuos full frame to handle frontbuffer invalidations")
Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/6679
Signed-off-by: Jouni Högander <jouni.hogander@intel.com>
Reported-by: Brian J. Tarricone <brian@tarricone.org>
Tested-by: Brian J. Tarricone <brian@tarricone.org>
Reviewed-by: Mika Kahola <mika.kahola@intel.com>
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221024054649.31299-1-jouni.hogander@intel.com
(cherry picked from commit d755f89220a2b49bc90b7b520bb6edeb4adb5f01)
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/i915/display/intel_psr.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
index d4cce627d7a8..15c3e448aa0e 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.c
+++ b/drivers/gpu/drm/i915/display/intel_psr.c
@@ -2201,8 +2201,11 @@ static void _psr_invalidate_handle(struct intel_dp *intel_dp)
if (intel_dp->psr.psr2_sel_fetch_enabled) {
u32 val;
- if (intel_dp->psr.psr2_sel_fetch_cff_enabled)
+ if (intel_dp->psr.psr2_sel_fetch_cff_enabled) {
+ /* Send one update otherwise lag is observed in screen */
+ intel_de_write(dev_priv, CURSURFLIVE(intel_dp->psr.pipe), 0);
return;
+ }
val = man_trk_ctl_enable_bit_get(dev_priv) |
man_trk_ctl_partial_frame_bit_get(dev_priv) |
--
2.39.0