drm/i915: Make updating pipe without modeset atomic.

Instead of doing a hack during primary plane commit the state
is updated during atomic evasion. It handles differences in
pipe size and the panel fitter.

This is continuing on top of Daniel's work to make faster
modesets atomic, and not yet enabled by default.
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
[danvet:
- simplify/future-proof if ladder that Jesse spotted
- resolve conflict in pipe_config_check and don't spuriously move the
  code.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/intel_atomic.c

@@ -93,6 +93,8 @@ intel_crtc_duplicate_state(struct drm_crtc *crtc)
 
 	__drm_atomic_helper_crtc_duplicate_state(crtc, &crtc_state->base);
 
+	crtc_state->update_pipe = false;
+
 	return &crtc_state->base;
 }
 

drivers/gpu/drm/i915/intel_display.c

@@ -112,6 +112,9 @@ static void skl_init_scalers(struct drm_device *dev, struct intel_crtc *intel_cr
 	struct intel_crtc_state *crtc_state);
 static int i9xx_get_refclk(const struct intel_crtc_state *crtc_state,
 			   int num_connectors);
+static void skylake_pfit_enable(struct intel_crtc *crtc);
+static void ironlake_pfit_disable(struct intel_crtc *crtc, bool force);
+static void ironlake_pfit_enable(struct intel_crtc *crtc);
 static void intel_modeset_setup_hw_state(struct drm_device *dev);
 
 typedef struct {
@@ -3265,14 +3268,20 @@ static bool intel_crtc_has_pending_flip(struct drm_crtc *crtc)
 	return pending;
 }
 
-static void intel_update_pipe_size(struct intel_crtc *crtc)
+static void intel_update_pipe_config(struct intel_crtc *crtc,
+				     struct intel_crtc_state *old_crtc_state)
 {
 	struct drm_device *dev = crtc->base.dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
-	const struct drm_display_mode *adjusted_mode;
+	struct intel_crtc_state *pipe_config =
+		to_intel_crtc_state(crtc->base.state);
 
-	if (!i915.fastboot)
-		return;
+	/* drm_atomic_helper_update_legacy_modeset_state might not be called. */
+	crtc->base.mode = crtc->base.state->mode;
+
+	DRM_DEBUG_KMS("Updating pipe size %ix%i -> %ix%i\n",
+		      old_crtc_state->pipe_src_w, old_crtc_state->pipe_src_h,
+		      pipe_config->pipe_src_w, pipe_config->pipe_src_h);
 
 	if (HAS_DDI(dev))
 		intel_set_pipe_csc(&crtc->base);
@@ -3284,27 +3293,24 @@ static void intel_update_pipe_size(struct intel_crtc *crtc)
 	 * fastboot case, we'll flip, but if we don't update the pipesrc and
 	 * pfit state, we'll end up with a big fb scanned out into the wrong
 	 * sized surface.
-	 *
-	 * To fix this properly, we need to hoist the checks up into
-	 * compute_mode_changes (or above), check the actual pfit state and
-	 * whether the platform allows pfit disable with pipe active, and only
-	 * then update the pipesrc and pfit state, even on the flip path.
 	 */
 
-	adjusted_mode = &crtc->config->base.adjusted_mode;
-
 	I915_WRITE(PIPESRC(crtc->pipe),
-		   ((adjusted_mode->crtc_hdisplay - 1) << 16) |
-		   (adjusted_mode->crtc_vdisplay - 1));
-	if (!crtc->config->pch_pfit.enabled &&
-	    (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS) ||
-	     intel_pipe_has_type(crtc, INTEL_OUTPUT_EDP))) {
-		I915_WRITE(PF_CTL(crtc->pipe), 0);
-		I915_WRITE(PF_WIN_POS(crtc->pipe), 0);
-		I915_WRITE(PF_WIN_SZ(crtc->pipe), 0);
+		   ((pipe_config->pipe_src_w - 1) << 16) |
+		   (pipe_config->pipe_src_h - 1));
+
+	/* on skylake this is done by detaching scalers */
+	if (INTEL_INFO(dev)->gen >= 9) {
+		skl_detach_scalers(crtc);
+
+		if (pipe_config->pch_pfit.enabled)
+			skylake_pfit_enable(crtc);
+	} else if (HAS_PCH_SPLIT(dev)) {
+		if (pipe_config->pch_pfit.enabled)
+			ironlake_pfit_enable(crtc);
+		else if (old_crtc_state->pch_pfit.enabled)
+			ironlake_pfit_disable(crtc, true);
 	}
-	crtc->config->pipe_src_w = adjusted_mode->crtc_hdisplay;
-	crtc->config->pipe_src_h = adjusted_mode->crtc_vdisplay;
 }
 
 static void intel_fdi_normal_train(struct drm_crtc *crtc)
@@ -4961,7 +4967,7 @@ static void haswell_crtc_enable(struct drm_crtc *crtc)
 	}
 }
 
-static void ironlake_pfit_disable(struct intel_crtc *crtc)
+static void ironlake_pfit_disable(struct intel_crtc *crtc, bool force)
 {
 	struct drm_device *dev = crtc->base.dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
@@ -4969,7 +4975,7 @@ static void ironlake_pfit_disable(struct intel_crtc *crtc)
 
 	/* To avoid upsetting the power well on haswell only disable the pfit if
 	 * it's in use. The hw state code will make sure we get this right. */
-	if (crtc->config->pch_pfit.enabled) {
+	if (force || crtc->config->pch_pfit.enabled) {
 		I915_WRITE(PF_CTL(pipe), 0);
 		I915_WRITE(PF_WIN_POS(pipe), 0);
 		I915_WRITE(PF_WIN_SZ(pipe), 0);
@@ -4996,7 +5002,7 @@ static void ironlake_crtc_disable(struct drm_crtc *crtc)
 
 	intel_disable_pipe(intel_crtc);
 
-	ironlake_pfit_disable(intel_crtc);
+	ironlake_pfit_disable(intel_crtc, false);
 
 	if (intel_crtc->config->has_pch_encoder)
 		ironlake_fdi_disable(crtc);
@@ -5059,7 +5065,7 @@ static void haswell_crtc_disable(struct drm_crtc *crtc)
 	if (INTEL_INFO(dev)->gen >= 9)
 		skylake_scaler_disable(intel_crtc);
 	else
-		ironlake_pfit_disable(intel_crtc);
+		ironlake_pfit_disable(intel_crtc, false);
 
 	intel_ddi_disable_pipe_clock(intel_crtc);
 
@@ -12218,7 +12224,6 @@ static bool intel_fuzzy_clock_check(int clock1, int clock2)
 			    base.head) \
 		if (mask & (1 <<(intel_crtc)->pipe))
 
-
 static bool
 intel_compare_m_n(unsigned int m, unsigned int n,
 		  unsigned int m2, unsigned int n2,
@@ -12439,19 +12444,21 @@ intel_pipe_config_compare(struct drm_device *dev,
 				      DRM_MODE_FLAG_NVSYNC);
 	}
 
-	PIPE_CONF_CHECK_I(pipe_src_w);
-	PIPE_CONF_CHECK_I(pipe_src_h);
-
 	PIPE_CONF_CHECK_X(gmch_pfit.control);
 	/* pfit ratios are autocomputed by the hw on gen4+ */
 	if (INTEL_INFO(dev)->gen < 4)
 		PIPE_CONF_CHECK_I(gmch_pfit.pgm_ratios);
 	PIPE_CONF_CHECK_X(gmch_pfit.lvds_border_bits);
 
-	PIPE_CONF_CHECK_I(pch_pfit.enabled);
-	if (current_config->pch_pfit.enabled) {
-		PIPE_CONF_CHECK_X(pch_pfit.pos);
-		PIPE_CONF_CHECK_X(pch_pfit.size);
+	if (!adjust) {
+		PIPE_CONF_CHECK_I(pipe_src_w);
+		PIPE_CONF_CHECK_I(pipe_src_h);
+
+		PIPE_CONF_CHECK_I(pch_pfit.enabled);
+		if (current_config->pch_pfit.enabled) {
+			PIPE_CONF_CHECK_X(pch_pfit.pos);
+			PIPE_CONF_CHECK_X(pch_pfit.size);
+		}
 	}
 
 	PIPE_CONF_CHECK_I(scaler_state.scaler_id);
@@ -12616,7 +12623,8 @@ check_crtc_state(struct drm_device *dev, struct drm_atomic_state *old_state)
 		struct intel_crtc_state *pipe_config, *sw_config;
 		bool active;
 
-		if (!needs_modeset(crtc->state))
+		if (!needs_modeset(crtc->state) &&
+		    !to_intel_crtc_state(crtc->state)->update_pipe)
 			continue;
 
 		__drm_atomic_helper_crtc_destroy_state(crtc, old_crtc_state);
@@ -12912,7 +12920,6 @@ static int intel_modeset_all_pipes(struct drm_atomic_state *state)
 	return ret;
 }
 
-
 static int intel_modeset_checks(struct drm_atomic_state *state)
 {
 	struct drm_device *dev = state->dev;
@@ -13003,6 +13010,7 @@ static int intel_atomic_check(struct drm_device *dev,
 					to_intel_crtc_state(crtc->state),
 					pipe_config, true)) {
 			crtc_state->mode_changed = false;
+			to_intel_crtc_state(crtc_state)->update_pipe = true;
 		}
 
 		if (needs_modeset(crtc_state)) {
@@ -13100,16 +13108,30 @@ static int intel_atomic_commit(struct drm_device *dev,
 	for_each_crtc_in_state(state, crtc, crtc_state, i) {
 		struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 		bool modeset = needs_modeset(crtc->state);
+		bool update_pipe = !modeset &&
+			to_intel_crtc_state(crtc->state)->update_pipe;
+		unsigned long put_domains = 0;
 
 		if (modeset && crtc->state->active) {
 			update_scanline_offset(to_intel_crtc(crtc));
 			dev_priv->display.crtc_enable(crtc);
 		}
 
+		if (update_pipe) {
+			put_domains = modeset_get_crtc_power_domains(crtc);
+
+			/* make sure intel_modeset_check_state runs */
+			any_ms = true;
+		}
+
 		if (!modeset)
 			intel_pre_plane_update(intel_crtc);
 
 		drm_atomic_helper_commit_planes_on_crtc(crtc_state);
+
+		if (put_domains)
+			modeset_put_power_domains(dev_priv, put_domains);
+
 		intel_post_plane_update(intel_crtc);
 	}
 
@@ -13426,10 +13448,6 @@ intel_commit_primary_plane(struct drm_plane *plane,
 	if (!crtc->state->active)
 		return;
 
-	if (state->visible)
-		/* FIXME: kill this fastboot hack */
-		intel_update_pipe_size(intel_crtc);
-
 	dev_priv->display.update_primary_plane(crtc, fb,
 					       state->src.x1 >> 16,
 					       state->src.y1 >> 16);
@@ -13450,6 +13468,9 @@ static void intel_begin_crtc_commit(struct drm_crtc *crtc,
 {
 	struct drm_device *dev = crtc->dev;
 	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+	struct intel_crtc_state *old_intel_state =
+		to_intel_crtc_state(old_crtc_state);
+	bool modeset = needs_modeset(crtc->state);
 
 	if (intel_crtc->atomic.update_wm_pre)
 		intel_update_watermarks(crtc);
@@ -13458,7 +13479,12 @@ static void intel_begin_crtc_commit(struct drm_crtc *crtc,
 	if (crtc->state->active)
 		intel_pipe_update_start(intel_crtc);
 
-	if (!needs_modeset(crtc->state) && INTEL_INFO(dev)->gen >= 9)
+	if (modeset)
+		return;
+
+	if (to_intel_crtc_state(crtc->state)->update_pipe)
+		intel_update_pipe_config(intel_crtc, old_intel_state);
+	else if (INTEL_INFO(dev)->gen >= 9)
 		skl_detach_scalers(intel_crtc);
 }
 

drivers/gpu/drm/i915/intel_drv.h

@@ -338,6 +338,8 @@ struct intel_crtc_state {
 #define PIPE_CONFIG_QUIRK_MODE_SYNC_FLAGS	(1<<0) /* unreliable sync mode.flags */
 	unsigned long quirks;
 
+	bool update_pipe;
+
 	/* Pipe source size (ie. panel fitter input size)
 	 * All planes will be positioned inside this space,
 	 * and get clipped at the edges. */