drm/i915: Handle joined pipes inside hsw_crtc_enable()

Handle only bigjoiner masters in skl_commit_modeset_enables/disables,
slave crtcs should be handled by master hooks. Same for encoders.
That way we can also remove a bunch of checks like intel_crtc_is_bigjoiner_slave.

v2: - Moved skl_pfit_enable, intel_dsc_enable, intel_crtc_vblank_on to intel_enable_ddi,
      so that it is now finally symmetrical with the disable case, because currently
      for some weird reason we are calling those from skl_commit_modeset_enables, while
      for the disable case those are called from the ddi disable hooks.
v3: - Create intel_ddi_enable_hdmi_or_sst symmetrical to
      intel_ddi_post_disable_hdmi_or_sst and move it also under non-mst check.
v4: - Fix intel_enable_ddi sequence
    - Call intel_crtc_update_active_timings for slave pipes as well
[v5: vsyrjala: Use the name 'pipe_crtc' for the per-pipe crtc pointer
               Use consistent style and naming
	       Protect macro arguments properly
               Drop superfluous changes to the modeset sequence,
	       this now follows the old non-joiner sequence 100%
	       apart from just looping in places]
Signed-off-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
Tested-by: Vidya Srinivas <vidya.srinivas@intel.com>
Reviewed-by: Manasi Navare <navaremanasi@chromium.org> #v4?
Co-developed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240409163502.29633-5-ville.syrjala@linux.intel.com

drivers/gpu/drm/i915/display/intel_ddi.c

@@ -3363,9 +3363,9 @@ static void intel_enable_ddi(struct intel_atomic_state *state,
 			     const struct intel_crtc_state *crtc_state,
 			     const struct drm_connector_state *conn_state)
 {
-	drm_WARN_ON(state->base.dev, crtc_state->has_pch_encoder);
+	struct drm_i915_private *i915 = to_i915(encoder->base.dev);
+	struct intel_crtc *pipe_crtc;
 
-	if (!intel_crtc_is_bigjoiner_slave(crtc_state))
 	intel_ddi_enable_transcoder_func(encoder, crtc_state);
 
 	/* Enable/Disable DP2.0 SDP split config before transcoder */
@@ -3375,7 +3375,13 @@ static void intel_enable_ddi(struct intel_atomic_state *state,
 
 	intel_ddi_wait_for_fec_status(encoder, crtc_state, true);
 
-	intel_crtc_vblank_on(crtc_state);
+	for_each_intel_crtc_in_pipe_mask_reverse(&i915->drm, pipe_crtc,
+						 intel_crtc_joined_pipe_mask(crtc_state)) {
+		const struct intel_crtc_state *pipe_crtc_state =
+			intel_atomic_get_new_crtc_state(state, pipe_crtc);
+
+		intel_crtc_vblank_on(pipe_crtc_state);
+	}
 
 	if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_HDMI))
 		intel_enable_ddi_hdmi(state, encoder, crtc_state, conn_state);

drivers/gpu/drm/i915/display/intel_display.c

@@ -1620,24 +1620,6 @@ static void hsw_set_frame_start_delay(const struct intel_crtc_state *crtc_state)
 		     HSW_FRAME_START_DELAY(crtc_state->framestart_delay - 1));
 }
 
-static void icl_ddi_bigjoiner_pre_enable(struct intel_atomic_state *state,
-					 const struct intel_crtc_state *crtc_state)
-{
-	struct intel_crtc *master_crtc = intel_master_crtc(crtc_state);
-
-	/*
-	 * Enable sequence steps 1-7 on bigjoiner master
-	 */
-	if (intel_crtc_is_bigjoiner_slave(crtc_state))
-		intel_encoders_pre_pll_enable(state, master_crtc);
-
-	if (crtc_state->shared_dpll)
-		intel_enable_shared_dpll(crtc_state);
-
-	if (intel_crtc_is_bigjoiner_slave(crtc_state))
-		intel_encoders_pre_enable(state, master_crtc);
-}
-
 static void hsw_configure_cpu_transcoder(const struct intel_crtc_state *crtc_state)
 {
 	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
@@ -1674,86 +1656,107 @@ static void hsw_crtc_enable(struct intel_atomic_state *state,
 		intel_atomic_get_new_crtc_state(state, crtc);
 	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
 	enum transcoder cpu_transcoder = new_crtc_state->cpu_transcoder;
-	enum pipe hsw_workaround_pipe;
+	struct intel_crtc *pipe_crtc;
 
 	if (drm_WARN_ON(&dev_priv->drm, crtc->active))
 		return;
 
-	intel_dmc_enable_pipe(dev_priv, crtc->pipe);
+	for_each_intel_crtc_in_pipe_mask_reverse(&dev_priv->drm, pipe_crtc,
+						 intel_crtc_joined_pipe_mask(new_crtc_state))
+		intel_dmc_enable_pipe(dev_priv, pipe_crtc->pipe);
 
-	if (!new_crtc_state->bigjoiner_pipes) {
 	intel_encoders_pre_pll_enable(state, crtc);
 
-		if (new_crtc_state->shared_dpll)
-			intel_enable_shared_dpll(new_crtc_state);
+	for_each_intel_crtc_in_pipe_mask_reverse(&dev_priv->drm, pipe_crtc,
+						 intel_crtc_joined_pipe_mask(new_crtc_state)) {
+		const struct intel_crtc_state *pipe_crtc_state =
+			intel_atomic_get_new_crtc_state(state, pipe_crtc);
 
-		intel_encoders_pre_enable(state, crtc);
-	} else {
-		icl_ddi_bigjoiner_pre_enable(state, new_crtc_state);
+		if (pipe_crtc_state->shared_dpll)
+			intel_enable_shared_dpll(pipe_crtc_state);
 	}
 
-	intel_dsc_enable(new_crtc_state);
+	intel_encoders_pre_enable(state, crtc);
+
+	for_each_intel_crtc_in_pipe_mask_reverse(&dev_priv->drm, pipe_crtc,
+						 intel_crtc_joined_pipe_mask(new_crtc_state)) {
+		const struct intel_crtc_state *pipe_crtc_state =
+			intel_atomic_get_new_crtc_state(state, pipe_crtc);
+
+		intel_dsc_enable(pipe_crtc_state);
 
 		if (DISPLAY_VER(dev_priv) >= 13)
-		intel_uncompressed_joiner_enable(new_crtc_state);
+			intel_uncompressed_joiner_enable(pipe_crtc_state);
+
+		intel_set_pipe_src_size(pipe_crtc_state);
 
-	intel_set_pipe_src_size(new_crtc_state);
 		if (DISPLAY_VER(dev_priv) >= 9 || IS_BROADWELL(dev_priv))
-		bdw_set_pipe_misc(new_crtc_state);
+			bdw_set_pipe_misc(pipe_crtc_state);
+	}
 
-	if (!intel_crtc_is_bigjoiner_slave(new_crtc_state) &&
-	    !transcoder_is_dsi(cpu_transcoder))
+	if (!transcoder_is_dsi(cpu_transcoder))
 		hsw_configure_cpu_transcoder(new_crtc_state);
 
-	crtc->active = true;
+	for_each_intel_crtc_in_pipe_mask_reverse(&dev_priv->drm, pipe_crtc,
+						 intel_crtc_joined_pipe_mask(new_crtc_state)) {
+		const struct intel_crtc_state *pipe_crtc_state =
+			intel_atomic_get_new_crtc_state(state, pipe_crtc);
+
+		pipe_crtc->active = true;
 
-	if (glk_need_scaler_clock_gating_wa(new_crtc_state))
-		glk_pipe_scaler_clock_gating_wa(crtc, true);
+		if (glk_need_scaler_clock_gating_wa(pipe_crtc_state))
+			glk_pipe_scaler_clock_gating_wa(pipe_crtc, true);
 
 		if (DISPLAY_VER(dev_priv) >= 9)
-		skl_pfit_enable(new_crtc_state);
+			skl_pfit_enable(pipe_crtc_state);
 		else
-		ilk_pfit_enable(new_crtc_state);
+			ilk_pfit_enable(pipe_crtc_state);
 
 		/*
 		 * On ILK+ LUT must be loaded before the pipe is running but with
 		 * clocks enabled
 		 */
-	intel_color_load_luts(new_crtc_state);
-	intel_color_commit_noarm(new_crtc_state);
-	intel_color_commit_arm(new_crtc_state);
+		intel_color_load_luts(pipe_crtc_state);
+		intel_color_commit_noarm(pipe_crtc_state);
+		intel_color_commit_arm(pipe_crtc_state);
 		/* update DSPCNTR to configure gamma/csc for pipe bottom color */
 		if (DISPLAY_VER(dev_priv) < 9)
-		intel_disable_primary_plane(new_crtc_state);
+			intel_disable_primary_plane(pipe_crtc_state);
 
-	hsw_set_linetime_wm(new_crtc_state);
+		hsw_set_linetime_wm(pipe_crtc_state);
 
 		if (DISPLAY_VER(dev_priv) >= 11)
-		icl_set_pipe_chicken(new_crtc_state);
+			icl_set_pipe_chicken(pipe_crtc_state);
 
-	intel_initial_watermarks(state, crtc);
-
-	if (intel_crtc_is_bigjoiner_slave(new_crtc_state))
-		intel_crtc_vblank_on(new_crtc_state);
+		intel_initial_watermarks(state, pipe_crtc);
+	}
 
 	intel_encoders_enable(state, crtc);
 
-	if (glk_need_scaler_clock_gating_wa(new_crtc_state)) {
-		intel_crtc_wait_for_next_vblank(crtc);
-		glk_pipe_scaler_clock_gating_wa(crtc, false);
+	for_each_intel_crtc_in_pipe_mask_reverse(&dev_priv->drm, pipe_crtc,
+						 intel_crtc_joined_pipe_mask(new_crtc_state)) {
+		const struct intel_crtc_state *pipe_crtc_state =
+			intel_atomic_get_new_crtc_state(state, pipe_crtc);
+		enum pipe hsw_workaround_pipe;
+
+		if (glk_need_scaler_clock_gating_wa(pipe_crtc_state)) {
+			intel_crtc_wait_for_next_vblank(pipe_crtc);
+			glk_pipe_scaler_clock_gating_wa(pipe_crtc, false);
 		}
 
-	/* If we change the relative order between pipe/planes enabling, we need
-	 * to change the workaround. */
-	hsw_workaround_pipe = new_crtc_state->hsw_workaround_pipe;
+		/*
+		 * If we change the relative order between pipe/planes
+		 * enabling, we need to change the workaround.
+		 */
+		hsw_workaround_pipe = pipe_crtc_state->hsw_workaround_pipe;
 		if (IS_HASWELL(dev_priv) && hsw_workaround_pipe != INVALID_PIPE) {
-		struct intel_crtc *wa_crtc;
-
-		wa_crtc = intel_crtc_for_pipe(dev_priv, hsw_workaround_pipe);
+			struct intel_crtc *wa_crtc =
+				intel_crtc_for_pipe(dev_priv, hsw_workaround_pipe);
 
 			intel_crtc_wait_for_next_vblank(wa_crtc);
 			intel_crtc_wait_for_next_vblank(wa_crtc);
 		}
+	}
 }
 
 void ilk_pfit_disable(const struct intel_crtc_state *old_crtc_state)
@@ -6763,18 +6766,22 @@ static void intel_enable_crtc(struct intel_atomic_state *state,
 	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);
+	struct intel_crtc *pipe_crtc;
 
 	if (!intel_crtc_needs_modeset(new_crtc_state))
 		return;
 
+	for_each_intel_crtc_in_pipe_mask_reverse(&dev_priv->drm, pipe_crtc,
+						 intel_crtc_joined_pipe_mask(new_crtc_state)) {
+		const struct intel_crtc_state *pipe_crtc_state =
+			intel_atomic_get_new_crtc_state(state, pipe_crtc);
+
 		/* VRR will be enable later, if required */
-	intel_crtc_update_active_timings(new_crtc_state, false);
+		intel_crtc_update_active_timings(pipe_crtc_state, false);
+	}
 
 	dev_priv->display.funcs.display->crtc_enable(state, crtc);
 
-	if (intel_crtc_is_bigjoiner_slave(new_crtc_state))
-		return;
-
 	/* vblanks work again, re-enable pipe CRC. */
 	intel_crtc_enable_pipe_crc(crtc);
 }
@@ -7079,12 +7086,14 @@ static void skl_commit_modeset_enables(struct intel_atomic_state *state)
 		if ((modeset_pipes & BIT(pipe)) == 0)
 			continue;
 
+		if (intel_crtc_is_bigjoiner_slave(new_crtc_state))
+			continue;
+
 		if (intel_dp_mst_is_slave_trans(new_crtc_state) ||
-		    is_trans_port_sync_master(new_crtc_state) ||
-		    intel_crtc_is_bigjoiner_master(new_crtc_state))
+		    is_trans_port_sync_master(new_crtc_state))
 			continue;
 
-		modeset_pipes &= ~BIT(pipe);
+		modeset_pipes &= ~intel_crtc_joined_pipe_mask(new_crtc_state);
 
 		intel_enable_crtc(state, crtc);
 	}
@@ -7099,7 +7108,10 @@ static void skl_commit_modeset_enables(struct intel_atomic_state *state)
 		if ((modeset_pipes & BIT(pipe)) == 0)
 			continue;
 
-		modeset_pipes &= ~BIT(pipe);
+		if (intel_crtc_is_bigjoiner_slave(new_crtc_state))
+			continue;
+
+		modeset_pipes &= ~intel_crtc_joined_pipe_mask(new_crtc_state);
 
 		intel_enable_crtc(state, crtc);
 	}

drivers/gpu/drm/i915/display/intel_display.h

@@ -280,6 +280,12 @@ enum phy_fia {
 			    base.head)					\
 		for_each_if((pipe_mask) & BIT(intel_crtc->pipe))
 
+#define for_each_intel_crtc_in_pipe_mask_reverse(dev, intel_crtc, pipe_mask)	\
+	list_for_each_entry_reverse((intel_crtc),				\
+				    &(dev)->mode_config.crtc_list,		\
+				    base.head)					\
+		for_each_if((pipe_mask) & BIT((intel_crtc)->pipe))
+
 #define for_each_intel_encoder(dev, intel_encoder)		\
 	list_for_each_entry(intel_encoder,			\
 			    &(dev)->mode_config.encoder_list,	\