diff mbox series

[v2,04/17] drm/i915: Disable live M/N updates when using bigjoiner

Message ID 20240404213441.17637-5-ville.syrjala@linux.intel.com (mailing list archive)
State New, archived
Headers show
Series drm/i915: Bigjoiner modeset sequence redesign and MST support | expand

Commit Message

Ville Syrjälä April 4, 2024, 9:34 p.m. UTC 
From: Ville Syrjälä <ville.syrjala@linux.intel.com>

All joined pipes share the same transcoder/timing generator.
Currently we just do the commits per-pipe, which doesn't really
work if we need to change the timings at the same time. For
now just disable live M/N updates when bigjoiner is needed.

Tested-by: Vidya Srinivas <vidya.srinivas@intel.com>
Reviewed-by: Arun R Murthy <arun.r.murthy@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_dp.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 8b67cd62f188..4552005caae2 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -2752,7 +2752,11 @@  intel_dp_drrs_compute_config(struct intel_connector *connector,
 		intel_panel_downclock_mode(connector, &pipe_config->hw.adjusted_mode);
 	int pixel_clock;
 
-	if (has_seamless_m_n(connector))
+	/*
+	 * FIXME all joined pipes share the same transcoder.
+	 * Need to account for that when updating M/N live.
+	 */
+	if (has_seamless_m_n(connector) && !pipe_config->bigjoiner_pipes)
 		pipe_config->update_m_n = true;
 
 	if (!can_enable_drrs(connector, pipe_config, downclock_mode)) {