[Intel-gfx] [CI 06/15] drm/i915: HW state readout for Bigjoiner case

[Manasi Navare <manasi.d.navare@intel.com>]

Skip iterating over bigjoiner slaves, only the master has the state we
care about.

Add the width of the bigjoiner slave to the reconstructed fb.

Hide the bigjoiner slave to userspace, and double the mode on bigjoiner
master.

And last, disable bigjoiner slave from primary if reconstruction fails.

v3:
* Fix the ddi_get_config slave error (Ankit Nautiyal)
v2:
* Unsupported bigjoiner config for initial fb (Ville)

Signed-off-by: Manasi Navare <manasi.d.navare@intel.com>
[vsyrjala:
* Don't do any hw->uapi state copy for bigjoiner slave
* We still have hw.mode so no need to pass it in
* Appease checkpatch]
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Animesh Manna <animesh.manna@intel.com>
---
 drivers/gpu/drm/i915/display/icl_dsi.c        |   2 -
 drivers/gpu/drm/i915/display/intel_ddi.c      |  37 ++-
 drivers/gpu/drm/i915/display/intel_display.c  | 307 ++++++++++++------
 .../drm/i915/display/intel_display_types.h    |   1 +
 4 files changed, 238 insertions(+), 109 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/icl_dsi.c b/drivers/gpu/drm/i915/display/icl_dsi.c
index e83364b5774f..a9439b415603 100644
--- a/drivers/gpu/drm/i915/display/icl_dsi.c
+++ b/drivers/gpu/drm/i915/display/icl_dsi.c
@@ -1492,8 +1492,6 @@ static void gen11_dsi_get_config(struct intel_encoder *encoder,
 	struct intel_crtc *crtc = to_intel_crtc(pipe_config->uapi.crtc);
 	struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
 
-	intel_dsc_get_config(pipe_config);
-
 	/* FIXME: adapt icl_ddi_clock_get() for DSI and use that? */
 	pipe_config->port_clock = intel_dpll_get_freq(i915,
 						      pipe_config->shared_dpll,
diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c
index 81c4043ce42a..c580a1de150d 100644
--- a/drivers/gpu/drm/i915/display/intel_ddi.c
+++ b/drivers/gpu/drm/i915/display/intel_ddi.c
@@ -4577,20 +4577,14 @@ static void bdw_get_trans_port_sync_config(struct intel_crtc_state *crtc_state)
 		    crtc_state->sync_mode_slaves_mask);
 }
 
-void intel_ddi_get_config(struct intel_encoder *encoder,
-			  struct intel_crtc_state *pipe_config)
+static void intel_ddi_read_func_ctl(struct intel_encoder *encoder,
+				    struct intel_crtc_state *pipe_config)
 {
 	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 	struct intel_crtc *intel_crtc = to_intel_crtc(pipe_config->uapi.crtc);
 	enum transcoder cpu_transcoder = pipe_config->cpu_transcoder;
 	u32 temp, flags = 0;
 
-	/* XXX: DSI transcoder paranoia */
-	if (drm_WARN_ON(&dev_priv->drm, transcoder_is_dsi(cpu_transcoder)))
-		return;
-
-	intel_dsc_get_config(pipe_config);
-
 	temp = intel_de_read(dev_priv, TRANS_DDI_FUNC_CTL(cpu_transcoder));
 	if (temp & TRANS_DDI_PHSYNC)
 		flags |= DRM_MODE_FLAG_PHSYNC;
@@ -4684,6 +4678,30 @@ void intel_ddi_get_config(struct intel_encoder *encoder,
 	default:
 		break;
 	}
+}
+
+void intel_ddi_get_config(struct intel_encoder *encoder,
+			  struct intel_crtc_state *pipe_config)
+{
+	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+	enum transcoder cpu_transcoder = pipe_config->cpu_transcoder;
+
+	/* XXX: DSI transcoder paranoia */
+	if (drm_WARN_ON(&dev_priv->drm, transcoder_is_dsi(cpu_transcoder)))
+		return;
+
+	if (pipe_config->bigjoiner_slave) {
+		/* read out pipe settings from master */
+		enum transcoder save = pipe_config->cpu_transcoder;
+
+		/* Our own transcoder needs to be disabled when reading it in intel_ddi_read_func_ctl() */
+		WARN_ON(pipe_config->output_types);
+		pipe_config->cpu_transcoder = (enum transcoder)pipe_config->bigjoiner_linked_crtc->pipe;
+		intel_ddi_read_func_ctl(encoder, pipe_config);
+		pipe_config->cpu_transcoder = save;
+	} else {
+		intel_ddi_read_func_ctl(encoder, pipe_config);
+	}
 
 	pipe_config->has_audio =
 		intel_ddi_is_audio_enabled(dev_priv, cpu_transcoder);
@@ -4709,7 +4727,8 @@ void intel_ddi_get_config(struct intel_encoder *encoder,
 		dev_priv->vbt.edp.bpp = pipe_config->pipe_bpp;
 	}
 
-	intel_ddi_clock_get(encoder, pipe_config);
+	if (!pipe_config->bigjoiner_slave)
+		intel_ddi_clock_get(encoder, pipe_config);
 
 	if (IS_GEN9_LP(dev_priv))
 		pipe_config->lane_lat_optim_mask =
diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index e5a56904f33f..68c4f6cca82d 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -3631,6 +3631,8 @@ intel_find_initial_plane_obj(struct intel_crtc *intel_crtc,
 	struct intel_plane *intel_plane = to_intel_plane(primary);
 	struct intel_plane_state *intel_state =
 		to_intel_plane_state(plane_state);
+	 struct intel_crtc_state *crtc_state =
+		 to_intel_crtc_state(intel_crtc->base.state);
 	struct drm_framebuffer *fb;
 	struct i915_vma *vma;
 
@@ -3653,7 +3655,7 @@ intel_find_initial_plane_obj(struct intel_crtc *intel_crtc,
 		if (c == &intel_crtc->base)
 			continue;
 
-		if (!to_intel_crtc(c)->active)
+		if (!to_intel_crtc_state(c->state)->uapi.active)
 			continue;
 
 		state = to_intel_plane_state(c->primary->state);
@@ -3675,6 +3677,11 @@ intel_find_initial_plane_obj(struct intel_crtc *intel_crtc,
 	 * pretend the BIOS never had it enabled.
 	 */
 	intel_plane_disable_noatomic(intel_crtc, intel_plane);
+	if (crtc_state->bigjoiner) {
+		struct intel_crtc *slave =
+			crtc_state->bigjoiner_linked_crtc;
+		intel_plane_disable_noatomic(slave, to_intel_plane(slave->base.primary));
+	}
 
 	return;
 
@@ -8220,13 +8227,27 @@ static void intel_crtc_readout_derived_state(struct intel_crtc_state *crtc_state
 
 	drm_mode_copy(pipe_mode, adjusted_mode);
 
+	if (crtc_state->bigjoiner) {
+		/*
+		 * transcoder is programmed to the full mode,
+		 * but pipe timings are half of the transcoder mode
+		 */
+		pipe_mode->crtc_hdisplay /= 2;
+		pipe_mode->crtc_hblank_start /= 2;
+		pipe_mode->crtc_hblank_end /= 2;
+		pipe_mode->crtc_hsync_start /= 2;
+		pipe_mode->crtc_hsync_end /= 2;
+		pipe_mode->crtc_htotal /= 2;
+		pipe_mode->crtc_clock /= 2;
+	}
+
 	intel_mode_from_crtc_timings(pipe_mode, pipe_mode);
 	intel_mode_from_crtc_timings(adjusted_mode, adjusted_mode);
 
 	intel_crtc_compute_pixel_rate(crtc_state);
 
 	drm_mode_copy(mode, adjusted_mode);
-	mode->hdisplay = crtc_state->pipe_src_w;
+	mode->hdisplay = crtc_state->pipe_src_w << crtc_state->bigjoiner;
 	mode->vdisplay = crtc_state->pipe_src_h;
 }
 
@@ -10698,6 +10719,7 @@ static void
 skl_get_initial_plane_config(struct intel_crtc *crtc,
 			     struct intel_initial_plane_config *plane_config)
 {
+	struct intel_crtc_state *crtc_state = to_intel_crtc_state(crtc->base.state);
 	struct drm_device *dev = crtc->base.dev;
 	struct drm_i915_private *dev_priv = to_i915(dev);
 	struct intel_plane *plane = to_intel_plane(crtc->base.primary);
@@ -10714,6 +10736,12 @@ skl_get_initial_plane_config(struct intel_crtc *crtc,
 
 	drm_WARN_ON(dev, pipe != crtc->pipe);
 
+	if (crtc_state->bigjoiner) {
+		drm_dbg_kms(&dev_priv->drm,
+			    "Unsupported bigjoiner configuration for initial FB\n");
+		return;
+	}
+
 	intel_fb = kzalloc(sizeof(*intel_fb), GFP_KERNEL);
 	if (!intel_fb) {
 		drm_dbg_kms(&dev_priv->drm, "failed to alloc fb\n");
@@ -11365,6 +11393,8 @@ static void hsw_get_ddi_port_state(struct intel_crtc *crtc,
 	} else {
 		tmp = intel_de_read(dev_priv,
 				    TRANS_DDI_FUNC_CTL(cpu_transcoder));
+		if (!(tmp & TRANS_DDI_FUNC_ENABLE))
+			return;
 		if (INTEL_GEN(dev_priv) >= 12)
 			port = TGL_TRANS_DDI_FUNC_CTL_VAL_TO_PORT(tmp);
 		else
@@ -11433,10 +11463,19 @@ static bool hsw_get_pipe_config(struct intel_crtc *crtc,
 		active = true;
 	}
 
-	if (!active)
-		goto out;
+	intel_dsc_get_config(pipe_config);
+
+	if (!active) {
+		/* bigjoiner slave doesn't enable transcoder */
+		if (!pipe_config->bigjoiner_slave)
+			goto out;
 
-	if (!transcoder_is_dsi(pipe_config->cpu_transcoder) ||
+		active = true;
+		pipe_config->pixel_multiplier = 1;
+
+		/* we cannot read out most state, so don't bother.. */
+		pipe_config->quirks |= PIPE_CONFIG_QUIRK_BIGJOINER_SLAVE;
+	} else if (!transcoder_is_dsi(pipe_config->cpu_transcoder) ||
 	    INTEL_GEN(dev_priv) >= 11) {
 		hsw_get_ddi_port_state(crtc, pipe_config);
 		intel_get_transcoder_timings(crtc, pipe_config);
@@ -11511,7 +11550,10 @@ static bool hsw_get_pipe_config(struct intel_crtc *crtc,
 		}
 	}
 
-	if (pipe_config->cpu_transcoder != TRANSCODER_EDP &&
+	if (pipe_config->bigjoiner_slave) {
+		/* Cannot be read out as a slave, set to 0. */
+		pipe_config->pixel_multiplier = 0;
+	} else if (pipe_config->cpu_transcoder != TRANSCODER_EDP &&
 	    !transcoder_is_dsi(pipe_config->cpu_transcoder)) {
 		pipe_config->pixel_multiplier =
 			intel_de_read(dev_priv,
@@ -13555,6 +13597,9 @@ intel_crtc_copy_uapi_to_hw_state(struct intel_atomic_state *state,
 
 static void intel_crtc_copy_hw_to_uapi_state(struct intel_crtc_state *crtc_state)
 {
+	if (crtc_state->bigjoiner_slave)
+		return;
+
 	crtc_state->uapi.enable = crtc_state->hw.enable;
 	crtc_state->uapi.active = crtc_state->hw.active;
 	drm_WARN_ON(crtc_state->uapi.crtc->dev,
@@ -14196,35 +14241,53 @@ intel_pipe_config_compare(const struct intel_crtc_state *current_config,
 
 	PIPE_CONF_CHECK_X(output_types);
 
-	PIPE_CONF_CHECK_I(hw.pipe_mode.crtc_hdisplay);
-	PIPE_CONF_CHECK_I(hw.pipe_mode.crtc_htotal);
-	PIPE_CONF_CHECK_I(hw.pipe_mode.crtc_hblank_start);
-	PIPE_CONF_CHECK_I(hw.pipe_mode.crtc_hblank_end);
-	PIPE_CONF_CHECK_I(hw.pipe_mode.crtc_hsync_start);
-	PIPE_CONF_CHECK_I(hw.pipe_mode.crtc_hsync_end);
-
-	PIPE_CONF_CHECK_I(hw.pipe_mode.crtc_vdisplay);
-	PIPE_CONF_CHECK_I(hw.pipe_mode.crtc_vtotal);
-	PIPE_CONF_CHECK_I(hw.pipe_mode.crtc_vblank_start);
-	PIPE_CONF_CHECK_I(hw.pipe_mode.crtc_vblank_end);
-	PIPE_CONF_CHECK_I(hw.pipe_mode.crtc_vsync_start);
-	PIPE_CONF_CHECK_I(hw.pipe_mode.crtc_vsync_end);
-
-	PIPE_CONF_CHECK_I(hw.adjusted_mode.crtc_hdisplay);
-	PIPE_CONF_CHECK_I(hw.adjusted_mode.crtc_htotal);
-	PIPE_CONF_CHECK_I(hw.adjusted_mode.crtc_hblank_start);
-	PIPE_CONF_CHECK_I(hw.adjusted_mode.crtc_hblank_end);
-	PIPE_CONF_CHECK_I(hw.adjusted_mode.crtc_hsync_start);
-	PIPE_CONF_CHECK_I(hw.adjusted_mode.crtc_hsync_end);
-
-	PIPE_CONF_CHECK_I(hw.adjusted_mode.crtc_vdisplay);
-	PIPE_CONF_CHECK_I(hw.adjusted_mode.crtc_vtotal);
-	PIPE_CONF_CHECK_I(hw.adjusted_mode.crtc_vblank_start);
-	PIPE_CONF_CHECK_I(hw.adjusted_mode.crtc_vblank_end);
-	PIPE_CONF_CHECK_I(hw.adjusted_mode.crtc_vsync_start);
-	PIPE_CONF_CHECK_I(hw.adjusted_mode.crtc_vsync_end);
-
-	PIPE_CONF_CHECK_I(pixel_multiplier);
+	/* FIXME do the readout properly and get rid of this quirk */
+	if (!PIPE_CONF_QUIRK(PIPE_CONFIG_QUIRK_BIGJOINER_SLAVE)) {
+		PIPE_CONF_CHECK_I(hw.pipe_mode.crtc_hdisplay);
+		PIPE_CONF_CHECK_I(hw.pipe_mode.crtc_htotal);
+		PIPE_CONF_CHECK_I(hw.pipe_mode.crtc_hblank_start);
+		PIPE_CONF_CHECK_I(hw.pipe_mode.crtc_hblank_end);
+		PIPE_CONF_CHECK_I(hw.pipe_mode.crtc_hsync_start);
+		PIPE_CONF_CHECK_I(hw.pipe_mode.crtc_hsync_end);
+
+		PIPE_CONF_CHECK_I(hw.pipe_mode.crtc_vdisplay);
+		PIPE_CONF_CHECK_I(hw.pipe_mode.crtc_vtotal);
+		PIPE_CONF_CHECK_I(hw.pipe_mode.crtc_vblank_start);
+		PIPE_CONF_CHECK_I(hw.pipe_mode.crtc_vblank_end);
+		PIPE_CONF_CHECK_I(hw.pipe_mode.crtc_vsync_start);
+		PIPE_CONF_CHECK_I(hw.pipe_mode.crtc_vsync_end);
+
+		PIPE_CONF_CHECK_I(hw.adjusted_mode.crtc_hdisplay);
+		PIPE_CONF_CHECK_I(hw.adjusted_mode.crtc_htotal);
+		PIPE_CONF_CHECK_I(hw.adjusted_mode.crtc_hblank_start);
+		PIPE_CONF_CHECK_I(hw.adjusted_mode.crtc_hblank_end);
+		PIPE_CONF_CHECK_I(hw.adjusted_mode.crtc_hsync_start);
+		PIPE_CONF_CHECK_I(hw.adjusted_mode.crtc_hsync_end);
+
+		PIPE_CONF_CHECK_I(hw.adjusted_mode.crtc_vdisplay);
+		PIPE_CONF_CHECK_I(hw.adjusted_mode.crtc_vtotal);
+		PIPE_CONF_CHECK_I(hw.adjusted_mode.crtc_vblank_start);
+		PIPE_CONF_CHECK_I(hw.adjusted_mode.crtc_vblank_end);
+		PIPE_CONF_CHECK_I(hw.adjusted_mode.crtc_vsync_start);
+		PIPE_CONF_CHECK_I(hw.adjusted_mode.crtc_vsync_end);
+
+		PIPE_CONF_CHECK_I(pixel_multiplier);
+
+		PIPE_CONF_CHECK_FLAGS(hw.adjusted_mode.flags,
+				      DRM_MODE_FLAG_INTERLACE);
+
+		if (!PIPE_CONF_QUIRK(PIPE_CONFIG_QUIRK_MODE_SYNC_FLAGS)) {
+			PIPE_CONF_CHECK_FLAGS(hw.adjusted_mode.flags,
+					      DRM_MODE_FLAG_PHSYNC);
+			PIPE_CONF_CHECK_FLAGS(hw.adjusted_mode.flags,
+					      DRM_MODE_FLAG_NHSYNC);
+			PIPE_CONF_CHECK_FLAGS(hw.adjusted_mode.flags,
+					      DRM_MODE_FLAG_PVSYNC);
+			PIPE_CONF_CHECK_FLAGS(hw.adjusted_mode.flags,
+					      DRM_MODE_FLAG_NVSYNC);
+		}
+	}
+
 	PIPE_CONF_CHECK_I(output_format);
 	PIPE_CONF_CHECK_BOOL(has_hdmi_sink);
 	if ((INTEL_GEN(dev_priv) < 8 && !IS_HASWELL(dev_priv)) ||
@@ -14234,24 +14297,12 @@ intel_pipe_config_compare(const struct intel_crtc_state *current_config,
 	PIPE_CONF_CHECK_BOOL(hdmi_scrambling);
 	PIPE_CONF_CHECK_BOOL(hdmi_high_tmds_clock_ratio);
 	PIPE_CONF_CHECK_BOOL(has_infoframe);
-	PIPE_CONF_CHECK_BOOL(fec_enable);
+	/* FIXME do the readout properly and get rid of this quirk */
+	if (!PIPE_CONF_QUIRK(PIPE_CONFIG_QUIRK_BIGJOINER_SLAVE))
+		PIPE_CONF_CHECK_BOOL(fec_enable);
 
 	PIPE_CONF_CHECK_BOOL_INCOMPLETE(has_audio);
 
-	PIPE_CONF_CHECK_FLAGS(hw.adjusted_mode.flags,
-			      DRM_MODE_FLAG_INTERLACE);
-
-	if (!PIPE_CONF_QUIRK(PIPE_CONFIG_QUIRK_MODE_SYNC_FLAGS)) {
-		PIPE_CONF_CHECK_FLAGS(hw.adjusted_mode.flags,
-				      DRM_MODE_FLAG_PHSYNC);
-		PIPE_CONF_CHECK_FLAGS(hw.adjusted_mode.flags,
-				      DRM_MODE_FLAG_NHSYNC);
-		PIPE_CONF_CHECK_FLAGS(hw.adjusted_mode.flags,
-				      DRM_MODE_FLAG_PVSYNC);
-		PIPE_CONF_CHECK_FLAGS(hw.adjusted_mode.flags,
-				      DRM_MODE_FLAG_NVSYNC);
-	}
-
 	PIPE_CONF_CHECK_X(gmch_pfit.control);
 	/* pfit ratios are autocomputed by the hw on gen4+ */
 	if (INTEL_GEN(dev_priv) < 4)
@@ -14277,7 +14328,9 @@ intel_pipe_config_compare(const struct intel_crtc_state *current_config,
 		}
 
 		PIPE_CONF_CHECK_I(scaler_state.scaler_id);
-		PIPE_CONF_CHECK_CLOCK_FUZZY(pixel_rate);
+		/* FIXME do the readout properly and get rid of this quirk */
+		if (!PIPE_CONF_QUIRK(PIPE_CONFIG_QUIRK_BIGJOINER_SLAVE))
+			PIPE_CONF_CHECK_CLOCK_FUZZY(pixel_rate);
 
 		PIPE_CONF_CHECK_X(gamma_mode);
 		if (IS_CHERRYVIEW(dev_priv))
@@ -14298,49 +14351,53 @@ intel_pipe_config_compare(const struct intel_crtc_state *current_config,
 	PIPE_CONF_CHECK_BOOL(double_wide);
 
 	PIPE_CONF_CHECK_P(shared_dpll);
-	PIPE_CONF_CHECK_X(dpll_hw_state.dpll);
-	PIPE_CONF_CHECK_X(dpll_hw_state.dpll_md);
-	PIPE_CONF_CHECK_X(dpll_hw_state.fp0);
-	PIPE_CONF_CHECK_X(dpll_hw_state.fp1);
-	PIPE_CONF_CHECK_X(dpll_hw_state.wrpll);
-	PIPE_CONF_CHECK_X(dpll_hw_state.spll);
-	PIPE_CONF_CHECK_X(dpll_hw_state.ctrl1);
-	PIPE_CONF_CHECK_X(dpll_hw_state.cfgcr1);
-	PIPE_CONF_CHECK_X(dpll_hw_state.cfgcr2);
-	PIPE_CONF_CHECK_X(dpll_hw_state.cfgcr0);
-	PIPE_CONF_CHECK_X(dpll_hw_state.ebb0);
-	PIPE_CONF_CHECK_X(dpll_hw_state.ebb4);
-	PIPE_CONF_CHECK_X(dpll_hw_state.pll0);
-	PIPE_CONF_CHECK_X(dpll_hw_state.pll1);
-	PIPE_CONF_CHECK_X(dpll_hw_state.pll2);
-	PIPE_CONF_CHECK_X(dpll_hw_state.pll3);
-	PIPE_CONF_CHECK_X(dpll_hw_state.pll6);
-	PIPE_CONF_CHECK_X(dpll_hw_state.pll8);
-	PIPE_CONF_CHECK_X(dpll_hw_state.pll9);
-	PIPE_CONF_CHECK_X(dpll_hw_state.pll10);
-	PIPE_CONF_CHECK_X(dpll_hw_state.pcsdw12);
-	PIPE_CONF_CHECK_X(dpll_hw_state.mg_refclkin_ctl);
-	PIPE_CONF_CHECK_X(dpll_hw_state.mg_clktop2_coreclkctl1);
-	PIPE_CONF_CHECK_X(dpll_hw_state.mg_clktop2_hsclkctl);
-	PIPE_CONF_CHECK_X(dpll_hw_state.mg_pll_div0);
-	PIPE_CONF_CHECK_X(dpll_hw_state.mg_pll_div1);
-	PIPE_CONF_CHECK_X(dpll_hw_state.mg_pll_lf);
-	PIPE_CONF_CHECK_X(dpll_hw_state.mg_pll_frac_lock);
-	PIPE_CONF_CHECK_X(dpll_hw_state.mg_pll_ssc);
-	PIPE_CONF_CHECK_X(dpll_hw_state.mg_pll_bias);
-	PIPE_CONF_CHECK_X(dpll_hw_state.mg_pll_tdc_coldst_bias);
-
-	PIPE_CONF_CHECK_X(dsi_pll.ctrl);
-	PIPE_CONF_CHECK_X(dsi_pll.div);
-
-	if (IS_G4X(dev_priv) || INTEL_GEN(dev_priv) >= 5)
-		PIPE_CONF_CHECK_I(pipe_bpp);
-
-	PIPE_CONF_CHECK_CLOCK_FUZZY(hw.pipe_mode.crtc_clock);
-	PIPE_CONF_CHECK_CLOCK_FUZZY(hw.adjusted_mode.crtc_clock);
-	PIPE_CONF_CHECK_CLOCK_FUZZY(port_clock);
-
-	PIPE_CONF_CHECK_I(min_voltage_level);
+
+	/* FIXME do the readout properly and get rid of this quirk */
+	if (!PIPE_CONF_QUIRK(PIPE_CONFIG_QUIRK_BIGJOINER_SLAVE)) {
+		PIPE_CONF_CHECK_X(dpll_hw_state.dpll);
+		PIPE_CONF_CHECK_X(dpll_hw_state.dpll_md);
+		PIPE_CONF_CHECK_X(dpll_hw_state.fp0);
+		PIPE_CONF_CHECK_X(dpll_hw_state.fp1);
+		PIPE_CONF_CHECK_X(dpll_hw_state.wrpll);
+		PIPE_CONF_CHECK_X(dpll_hw_state.spll);
+		PIPE_CONF_CHECK_X(dpll_hw_state.ctrl1);
+		PIPE_CONF_CHECK_X(dpll_hw_state.cfgcr1);
+		PIPE_CONF_CHECK_X(dpll_hw_state.cfgcr2);
+		PIPE_CONF_CHECK_X(dpll_hw_state.cfgcr0);
+		PIPE_CONF_CHECK_X(dpll_hw_state.ebb0);
+		PIPE_CONF_CHECK_X(dpll_hw_state.ebb4);
+		PIPE_CONF_CHECK_X(dpll_hw_state.pll0);
+		PIPE_CONF_CHECK_X(dpll_hw_state.pll1);
+		PIPE_CONF_CHECK_X(dpll_hw_state.pll2);
+		PIPE_CONF_CHECK_X(dpll_hw_state.pll3);
+		PIPE_CONF_CHECK_X(dpll_hw_state.pll6);
+		PIPE_CONF_CHECK_X(dpll_hw_state.pll8);
+		PIPE_CONF_CHECK_X(dpll_hw_state.pll9);
+		PIPE_CONF_CHECK_X(dpll_hw_state.pll10);
+		PIPE_CONF_CHECK_X(dpll_hw_state.pcsdw12);
+		PIPE_CONF_CHECK_X(dpll_hw_state.mg_refclkin_ctl);
+		PIPE_CONF_CHECK_X(dpll_hw_state.mg_clktop2_coreclkctl1);
+		PIPE_CONF_CHECK_X(dpll_hw_state.mg_clktop2_hsclkctl);
+		PIPE_CONF_CHECK_X(dpll_hw_state.mg_pll_div0);
+		PIPE_CONF_CHECK_X(dpll_hw_state.mg_pll_div1);
+		PIPE_CONF_CHECK_X(dpll_hw_state.mg_pll_lf);
+		PIPE_CONF_CHECK_X(dpll_hw_state.mg_pll_frac_lock);
+		PIPE_CONF_CHECK_X(dpll_hw_state.mg_pll_ssc);
+		PIPE_CONF_CHECK_X(dpll_hw_state.mg_pll_bias);
+		PIPE_CONF_CHECK_X(dpll_hw_state.mg_pll_tdc_coldst_bias);
+
+		PIPE_CONF_CHECK_X(dsi_pll.ctrl);
+		PIPE_CONF_CHECK_X(dsi_pll.div);
+
+		if (IS_G4X(dev_priv) || INTEL_GEN(dev_priv) >= 5)
+			PIPE_CONF_CHECK_I(pipe_bpp);
+
+		PIPE_CONF_CHECK_CLOCK_FUZZY(hw.pipe_mode.crtc_clock);
+		PIPE_CONF_CHECK_CLOCK_FUZZY(hw.adjusted_mode.crtc_clock);
+		PIPE_CONF_CHECK_CLOCK_FUZZY(port_clock);
+
+		PIPE_CONF_CHECK_I(min_voltage_level);
+	}
 
 	PIPE_CONF_CHECK_X(infoframes.enable);
 	PIPE_CONF_CHECK_X(infoframes.gcp);
@@ -14352,6 +14409,9 @@ intel_pipe_config_compare(const struct intel_crtc_state *current_config,
 
 	PIPE_CONF_CHECK_X(sync_mode_slaves_mask);
 	PIPE_CONF_CHECK_I(master_transcoder);
+	PIPE_CONF_CHECK_BOOL(bigjoiner);
+	PIPE_CONF_CHECK_BOOL(bigjoiner_slave);
+	PIPE_CONF_CHECK_P(bigjoiner_linked_crtc);
 
 	PIPE_CONF_CHECK_I(dsc.compression_enable);
 	PIPE_CONF_CHECK_I(dsc.dsc_split);
@@ -14623,6 +14683,7 @@ verify_crtc_state(struct intel_crtc *crtc,
 	struct intel_encoder *encoder;
 	struct intel_crtc_state *pipe_config = old_crtc_state;
 	struct drm_atomic_state *state = old_crtc_state->uapi.state;
+	struct intel_crtc *master = crtc;
 
 	__drm_atomic_helper_crtc_destroy_state(&old_crtc_state->uapi);
 	intel_crtc_free_hw_state(old_crtc_state);
@@ -14650,7 +14711,10 @@ verify_crtc_state(struct intel_crtc *crtc,
 			"(expected %i, found %i)\n",
 			new_crtc_state->hw.active, crtc->active);
 
-	for_each_encoder_on_crtc(dev, &crtc->base, encoder) {
+	if (new_crtc_state->bigjoiner_slave)
+		master = new_crtc_state->bigjoiner_linked_crtc;
+
+	for_each_encoder_on_crtc(dev, &master->base, encoder) {
 		enum pipe pipe;
 		bool active;
 
@@ -14660,7 +14724,7 @@ verify_crtc_state(struct intel_crtc *crtc,
 				encoder->base.base.id, active,
 				new_crtc_state->hw.active);
 
-		I915_STATE_WARN(active && crtc->pipe != pipe,
+		I915_STATE_WARN(active && master->pipe != pipe,
 				"Encoder connected to wrong pipe %c\n",
 				pipe_name(pipe));
 
@@ -18566,7 +18630,7 @@ int intel_modeset_init_nogem(struct drm_i915_private *i915)
 	for_each_intel_crtc(dev, crtc) {
 		struct intel_initial_plane_config plane_config = {};
 
-		if (!crtc->active)
+		if (!to_intel_crtc_state(crtc->base.state)->uapi.active)
 			continue;
 
 		/*
@@ -18877,7 +18941,8 @@ static void intel_sanitize_crtc(struct intel_crtc *crtc,
 
 	/* Adjust the state of the output pipe according to whether we
 	 * have active connectors/encoders. */
-	if (crtc_state->hw.active && !intel_crtc_has_encoders(crtc))
+	if (crtc_state->hw.active && !intel_crtc_has_encoders(crtc) &&
+	    !crtc_state->bigjoiner_slave)
 		intel_crtc_disable_noatomic(crtc, ctx);
 
 	if (crtc_state->hw.active || HAS_GMCH(dev_priv)) {
@@ -19092,6 +19157,16 @@ static void intel_modeset_readout_hw_state(struct drm_device *dev)
 			intel_encoder_get_config(encoder, crtc_state);
 			if (encoder->sync_state)
 				encoder->sync_state(encoder, crtc_state);
+
+			/* read out to slave crtc as well for bigjoiner */
+			if (crtc_state->bigjoiner) {
+				/* encoder should read be linked to bigjoiner master */
+				WARN_ON(crtc_state->bigjoiner_slave);
+
+				crtc = crtc_state->bigjoiner_linked_crtc;
+				crtc_state = to_intel_crtc_state(crtc->base.state);
+				intel_encoder_get_config(encoder, crtc_state);
+			}
 		} else {
 			encoder->base.crtc = NULL;
 		}
@@ -19147,6 +19222,9 @@ static void intel_modeset_readout_hw_state(struct drm_device *dev)
 		struct intel_plane *plane;
 		int min_cdclk = 0;
 
+		if (crtc_state->bigjoiner_slave)
+			continue;
+
 		if (crtc_state->hw.active) {
 			/*
 			 * The initial mode needs to be set in order to keep
@@ -19207,6 +19285,39 @@ static void intel_modeset_readout_hw_state(struct drm_device *dev)
 		intel_bw_crtc_update(bw_state, crtc_state);
 
 		intel_pipe_config_sanity_check(dev_priv, crtc_state);
+
+		/* discard our incomplete slave state, copy it from master */
+		if (crtc_state->bigjoiner && crtc_state->hw.active) {
+			struct intel_crtc *slave = crtc_state->bigjoiner_linked_crtc;
+			struct intel_crtc_state *slave_crtc_state =
+				to_intel_crtc_state(slave->base.state);
+
+			copy_bigjoiner_crtc_state(slave_crtc_state, crtc_state);
+			slave->base.mode = crtc->base.mode;
+
+			cdclk_state->min_cdclk[slave->pipe] = min_cdclk;
+			cdclk_state->min_voltage_level[slave->pipe] =
+				crtc_state->min_voltage_level;
+
+			for_each_intel_plane_on_crtc(&dev_priv->drm, slave, plane) {
+				const struct intel_plane_state *plane_state =
+					to_intel_plane_state(plane->base.state);
+
+				/*
+				 * FIXME don't have the fb yet, so can't
+				 * use intel_plane_data_rate() :(
+				 */
+				if (plane_state->uapi.visible)
+					crtc_state->data_rate[plane->id] =
+						4 * crtc_state->pixel_rate;
+				else
+					crtc_state->data_rate[plane->id] = 0;
+			}
+
+			intel_bw_crtc_update(bw_state, slave_crtc_state);
+			drm_calc_timestamping_constants(&slave->base,
+							&slave_crtc_state->hw.adjusted_mode);
+		}
 	}
 }
 
diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
index b3d94e6cd7c5..ce82d654d0f2 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -850,6 +850,7 @@ struct intel_crtc_state {
 	 * accordingly.
 	 */
 #define PIPE_CONFIG_QUIRK_MODE_SYNC_FLAGS	(1<<0) /* unreliable sync mode.flags */
+#define PIPE_CONFIG_QUIRK_BIGJOINER_SLAVE      (1<<1) /* bigjoiner slave, partial readout */
 	unsigned long quirks;
 
 	unsigned fb_bits; /* framebuffers to flip */
-- 
2.19.1

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