This is a note to let you know that I've just added the patch titled
drm/i915: Disable port sync when bigjoiner is used
to the 6.8-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-disable-port-sync-when-bigjoiner-is-used.patch
and it can be found in the queue-6.8 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 0653d501409eeb9f1deb7e4c12e4d0d2c9f1cba1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= <ville.syrjala@xxxxxxxxxxxxxxx>
Date: Fri, 5 Apr 2024 00:34:27 +0300
Subject: drm/i915: Disable port sync when bigjoiner is used
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From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
commit 0653d501409eeb9f1deb7e4c12e4d0d2c9f1cba1 upstream.
The current modeset sequence can't handle port sync and bigjoiner
at the same time. Refuse port sync when bigjoiner is needed,
at least until we fix the modeset sequence.
v2: Add a FIXME (Vandite)
Cc: stable@xxxxxxxxxxxxxxx
Tested-by: Vidya Srinivas <vidya.srinivas@xxxxxxxxx>
Reviewed-by: Vandita Kulkarni <vandita.kulkarni@xxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20240404213441.17637-4-ville.syrjala@xxxxxxxxxxxxxxx
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
(cherry picked from commit b37e1347b991459c38c56ec2476087854a4f720b)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_ddi.c | 5 +++++
1 file changed, 5 insertions(+)
--- a/drivers/gpu/drm/i915/display/intel_ddi.c
+++ b/drivers/gpu/drm/i915/display/intel_ddi.c
@@ -4229,7 +4229,12 @@ static bool m_n_equal(const struct intel
static bool crtcs_port_sync_compatible(const struct intel_crtc_state *crtc_state1,
const struct intel_crtc_state *crtc_state2)
{
+ /*
+ * FIXME the modeset sequence is currently wrong and
+ * can't deal with bigjoiner + port sync at the same time.
+ */
return crtc_state1->hw.active && crtc_state2->hw.active &&
+ !crtc_state1->bigjoiner_pipes && !crtc_state2->bigjoiner_pipes &&
crtc_state1->output_types == crtc_state2->output_types &&
crtc_state1->output_format == crtc_state2->output_format &&
crtc_state1->lane_count == crtc_state2->lane_count &&
Patches currently in stable-queue which might be from ville.syrjala@xxxxxxxxxxxxxxx are
queue-6.8/drm-i915-cdclk-fix-cdclk-programming-order-when-pipes-are-active.patch
queue-6.8/drm-client-fully-protect-modes-with-dev-mode_config.mutex.patch
queue-6.8/drm-i915-disable-live-m-n-updates-when-using-bigjoiner.patch
queue-6.8/drm-i915-vrr-disable-vrr-when-using-bigjoiner.patch
queue-6.8/drm-i915-disable-port-sync-when-bigjoiner-is-used.patch
queue-6.8/drm-i915-psr-disable-psr-when-bigjoiner-is-used.patch
