Commit 9c722e17c1b9 ("drm/i915: Disable pipes in reverse order")
reverted the order that pipes gets disabled because of TGL
master/slave relationship between transcoders in MST mode.
But as stated in a comment in skl_commit_modeset_enables() the
enabling order is not always crescent, possibly causing previously
selected slave transcoder being enabled before master so another
approach will be needed to select a transcoder to master in MST mode.
It will be similar to the approach taken in port sync.
But instead of implement something like
intel_trans_port_sync_modeset_disables() to MST lets simply it and
iterate over all pipes 2 times, the first one disabling any slave and
then disabling everything else.
The MST bits will be added in another patch.
Cc: Manasi Navare <manasi.d.nav...@intel.com>
Cc: Matt Roper <matthew.d.ro...@intel.com>
Cc: Maarten Lankhorst <maarten.lankho...@linux.intel.com>
Cc: Ville Syrjälä <ville.syrj...@linux.intel.com>
Signed-off-by: José Roberto de Souza <jose.so...@intel.com>
---
drivers/gpu/drm/i915/display/intel_display.c | 79 ++++++--------------
1 file changed, 22 insertions(+), 57 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_display.c
b/drivers/gpu/drm/i915/display/intel_display.c
index 53dc310a5f6d..1b1fbb6d8acc 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -14443,53 +14443,16 @@ static void intel_old_crtc_state_disables(struct
intel_atomic_state *state,
dev_priv->display.initial_watermarks(state, crtc);
}
-static void intel_trans_port_sync_modeset_disables(struct intel_atomic_state
*state,
- struct intel_crtc *crtc,
- struct intel_crtc_state
*old_crtc_state,
- struct intel_crtc_state
*new_crtc_state)
-{
- struct intel_crtc *slave_crtc = intel_get_slave_crtc(new_crtc_state);
- struct intel_crtc_state *new_slave_crtc_state =
- intel_atomic_get_new_crtc_state(state, slave_crtc);
- struct intel_crtc_state *old_slave_crtc_state =
- intel_atomic_get_old_crtc_state(state, slave_crtc);
-
- WARN_ON(!slave_crtc || !new_slave_crtc_state ||
- !old_slave_crtc_state);
-
- /* Disable Slave first */
- intel_pre_plane_update(old_slave_crtc_state, new_slave_crtc_state);
- if (old_slave_crtc_state->hw.active)
- intel_old_crtc_state_disables(state,
- old_slave_crtc_state,
- new_slave_crtc_state,
- slave_crtc);
-
- /* Disable Master */
- intel_pre_plane_update(old_crtc_state, new_crtc_state);
- if (old_crtc_state->hw.active)
- intel_old_crtc_state_disables(state,
- old_crtc_state,
- new_crtc_state,
- crtc);
-}
-
static void intel_commit_modeset_disables(struct intel_atomic_state *state)
{
struct intel_crtc_state *new_crtc_state, *old_crtc_state;
struct intel_crtc *crtc;
int i;
- /*
- * Disable CRTC/pipes in reverse order because some features(MST in
- * TGL+) requires master and slave relationship between pipes, so it
- * should always pick the lowest pipe as master as it will be enabled
- * first and disable in the reverse order so the master will be the
- * last one to be disabled.
- */
- for_each_oldnew_intel_crtc_in_state_reverse(state, crtc, old_crtc_state,
- new_crtc_state, i) {
- if (!needs_modeset(new_crtc_state))
+ /* Only disable port sync slaves */
+ for_each_oldnew_intel_crtc_in_state(state, crtc, old_crtc_state,
+ new_crtc_state, i) {
+ if (!needs_modeset(new_crtc_state) || !crtc->active)
continue;
/* In case of Transcoder port Sync master slave CRTCs can be
@@ -14497,23 +14460,25 @@ static void intel_commit_modeset_disables(struct
intel_atomic_state *state)
* slave CRTCs are disabled first and then master CRTC since
* Slave vblanks are masked till Master Vblanks.
*/
- if (is_trans_port_sync_mode(new_crtc_state)) {
- if (is_trans_port_sync_master(new_crtc_state))
- intel_trans_port_sync_modeset_disables(state,
- crtc,
-
old_crtc_state,
-
new_crtc_state);
- else
- continue;
- } else {
- intel_pre_plane_update(old_crtc_state, new_crtc_state);
+ if (!is_trans_port_sync_mode(new_crtc_state))
+ continue;
+ if (is_trans_port_sync_master(new_crtc_state))
+ continue;
- if (old_crtc_state->hw.active)
- intel_old_crtc_state_disables(state,
- old_crtc_state,
- new_crtc_state,
- crtc);
- }
+ intel_pre_plane_update(old_crtc_state, new_crtc_state);
+ intel_old_crtc_state_disables(state, old_crtc_state,
+ new_crtc_state, crtc);
+ }
+
+ /* Disable everything else left on */
+ for_each_oldnew_intel_crtc_in_state(state, crtc, old_crtc_state,
+ new_crtc_state, i) {
+ if (!needs_modeset(new_crtc_state) || !crtc->active)
+ continue;
+
+ intel_pre_plane_update(old_crtc_state, new_crtc_state);
+ intel_old_crtc_state_disables(state, old_crtc_state,
+ new_crtc_state, crtc);
}
}
--
2.24.0
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