drm/i915: Handle joined pipes inside hsw_crtc_disable()

Reorganize the crtc disable path to only deal with the
master pipes/transcoders in intel_old_crtc_state_disables()
and offload the handling of joined pipes to hsw_crtc_disable().
This makes the whole thing much more sensible since we can
actually control the order in which we do the per-pipe vs.
per-transcoder modeset steps.

v2: Use the name 'pipe_crtc' for the per-pipe crtc pointer

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>
Link: https://patchwork.freedesktop.org/patch/msgid/20240409163502.29633-4-ville.syrjala@linux.intel.com

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index c1d8f08..3036253 100644 (file)
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -1816,29 +1816,28 @@ static void hsw_crtc_disable(struct intel_atomic_state *state,
        const struct intel_crtc_state *old_crtc_state =
                intel_atomic_get_old_crtc_state(state, crtc);
        struct drm_i915_private *i915 = to_i915(crtc->base.dev);
+       struct intel_crtc *pipe_crtc;
 
        /*
         * FIXME collapse everything to one hook.
         * Need care with mst->ddi interactions.
         */
-       if (!intel_crtc_is_bigjoiner_slave(old_crtc_state)) {
-               intel_encoders_disable(state, crtc);
-               intel_encoders_post_disable(state, crtc);
-       }
-
-       intel_disable_shared_dpll(old_crtc_state);
+       intel_encoders_disable(state, crtc);
+       intel_encoders_post_disable(state, crtc);
 
-       if (!intel_crtc_is_bigjoiner_slave(old_crtc_state)) {
-               struct intel_crtc *slave_crtc;
+       for_each_intel_crtc_in_pipe_mask(&i915->drm, pipe_crtc,
+                                        intel_crtc_joined_pipe_mask(old_crtc_state)) {
+               const struct intel_crtc_state *old_pipe_crtc_state =
+                       intel_atomic_get_old_crtc_state(state, pipe_crtc);
 
-               intel_encoders_post_pll_disable(state, crtc);
+               intel_disable_shared_dpll(old_pipe_crtc_state);
+       }
 
-               intel_dmc_disable_pipe(i915, crtc->pipe);
+       intel_encoders_post_pll_disable(state, crtc);
 
-               for_each_intel_crtc_in_pipe_mask(&i915->drm, slave_crtc,
-                                                intel_crtc_bigjoiner_slave_pipes(old_crtc_state))
-                       intel_dmc_disable_pipe(i915, slave_crtc->pipe);
-       }
+       for_each_intel_crtc_in_pipe_mask(&i915->drm, pipe_crtc,
+                                        intel_crtc_joined_pipe_mask(old_crtc_state))
+               intel_dmc_disable_pipe(i915, pipe_crtc->pipe);
 }
 
 static void i9xx_pfit_enable(const struct intel_crtc_state *crtc_state)
@@ -6869,21 +6868,31 @@ static void intel_old_crtc_state_disables(struct intel_atomic_state *state,
                                          struct intel_crtc *crtc)
 {
        struct drm_i915_private *dev_priv = to_i915(state->base.dev);
-       const struct intel_crtc_state *new_crtc_state =
-               intel_atomic_get_new_crtc_state(state, crtc);
+       const struct intel_crtc_state *old_crtc_state =
+               intel_atomic_get_old_crtc_state(state, crtc);
+       struct intel_crtc *pipe_crtc;
 
        /*
         * We need to disable pipe CRC before disabling the pipe,
         * or we race against vblank off.
         */
-       intel_crtc_disable_pipe_crc(crtc);
+       for_each_intel_crtc_in_pipe_mask(&dev_priv->drm, pipe_crtc,
+                                        intel_crtc_joined_pipe_mask(old_crtc_state))
+               intel_crtc_disable_pipe_crc(pipe_crtc);
 
        dev_priv->display.funcs.display->crtc_disable(state, crtc);
-       crtc->active = false;
-       intel_fbc_disable(crtc);
 
-       if (!new_crtc_state->hw.active)
-               intel_initial_watermarks(state, crtc);
+       for_each_intel_crtc_in_pipe_mask(&dev_priv->drm, pipe_crtc,
+                                        intel_crtc_joined_pipe_mask(old_crtc_state)) {
+               const struct intel_crtc_state *new_pipe_crtc_state =
+                       intel_atomic_get_new_crtc_state(state, pipe_crtc);
+
+               pipe_crtc->active = false;
+               intel_fbc_disable(pipe_crtc);
+
+               if (!new_pipe_crtc_state->hw.active)
+                       intel_initial_watermarks(state, pipe_crtc);
+       }
 }
 
 static void intel_commit_modeset_disables(struct intel_atomic_state *state)
@@ -6923,19 +6932,21 @@ static void intel_commit_modeset_disables(struct intel_atomic_state *state)
                if ((disable_pipes & BIT(crtc->pipe)) == 0)
                        continue;
 
+               if (intel_crtc_is_bigjoiner_slave(old_crtc_state))
+                       continue;
+
                /* In case of Transcoder port Sync master slave CRTCs can be
                 * assigned in any order and we need to make sure that
                 * slave CRTCs are disabled first and then master CRTC since
                 * Slave vblanks are masked till Master Vblanks.
                 */
                if (!is_trans_port_sync_slave(old_crtc_state) &&
-                   !intel_dp_mst_is_slave_trans(old_crtc_state) &&
-                   !intel_crtc_is_bigjoiner_slave(old_crtc_state))
+                   !intel_dp_mst_is_slave_trans(old_crtc_state))
                        continue;
 
                intel_old_crtc_state_disables(state, crtc);
 
-               disable_pipes &= ~BIT(crtc->pipe);
+               disable_pipes &= ~intel_crtc_joined_pipe_mask(old_crtc_state);
        }
 
        /* Disable everything else left on */
@@ -6943,9 +6954,12 @@ static void intel_commit_modeset_disables(struct intel_atomic_state *state)
                if ((disable_pipes & BIT(crtc->pipe)) == 0)
                        continue;
 
+               if (intel_crtc_is_bigjoiner_slave(old_crtc_state))
+                       continue;
+
                intel_old_crtc_state_disables(state, crtc);
 
-               disable_pipes &= ~BIT(crtc->pipe);
+               disable_pipes &= ~intel_crtc_joined_pipe_mask(old_crtc_state);
        }
 
        drm_WARN_ON(&i915->drm, disable_pipes);