Merge tag 'drm-intel-next-2017-09-07' of git://anongit.freedesktop.org/git/drm-intel into drm-next

Getting started with v4.15 features:

- Cannonlake workarounds (Rodrigo, Oscar)
- Infoframe refactoring and fixes to enable infoframes for DP (Ville)
- VBT definition updates (Jani)
- Sparse warning fixes (Ville, Chris)
- Crtc state usage fixes and cleanups (Ville)
- DP vswing, pre-emph and buffer translation refactoring and fixes (Rodrigo)
- Prevent IPS from interfering with CRC capture (Ville, Marta)
- Enable Mesa to advertise ARB_timer_query (Nanley)
- Refactor GT number into intel_device_info (Lionel)
- Avoid eDP DP AUX CH timeouts harder (Manasi)
- CDCLK check improvements (Ville)
- Restore GPU clock boost on missed pageflip vblanks (Chris)
- Fence register reservation API for vGPU (Changbin)
- First batch of CCS fixes (Ville)
- Finally, numerous GEM fixes, cleanups and improvements (Chris)

* tag 'drm-intel-next-2017-09-07' of git://anongit.freedesktop.org/git/drm-intel: (100 commits)
  drm/i915: Update DRIVER_DATE to 20170907
  drm/i915/cnl: WaThrottleEUPerfToAvoidTDBackPressure:cnl(pre-prod)
  drm/i915: Lift has-pinned-pages assert to caller of ____i915_gem_object_get_pages
  drm/i915: Display WA #1133 WaFbcSkipSegments:cnl, glk
  drm/i915/cnl: Allow the reg_read ioctl to read the RCS TIMESTAMP register
  drm/i915: Move device_info.has_snoop into the static tables
  drm/i915: Disable MI_STORE_DATA_IMM for i915g/i915gm
  drm/i915: Re-enable GTT following a device reset
  drm/i915/cnp: Wa 1181: Fix Backlight issue
  drm/i915: Annotate user relocs with __user
  drm/i915: Constify load detect mode
  drm/i915/perf: Remove __user from u64 in drm_i915_perf_oa_config
  drm/i915: Silence sparse by using gfp_t
  drm/i915: io unmap functions want __iomem
  drm/i915: Add __rcu to radix tree slot pointer
  drm/i915: Wake up the device for the fbdev setup
  drm/i915: Add interface to reserve fence registers for vGPU
  drm/i915: Use correct path to trace include
  drm/i915: Fix the missing PPAT cache attributes on CNL
  drm/i915: Fix enum pipe vs. enum transcoder for the PCH transcoder
  ...

1 files changed, 126 insertions, 55 deletions

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 4b34fa6954f9..f780f39e0758 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -3770,8 +3770,8 @@ void intel_finish_reset(struct drm_i915_private *dev_priv)
 	if (!gpu_reset_clobbers_display(dev_priv)) {
 		/* for testing only restore the display */
 		ret = __intel_display_resume(dev, state, ctx);
-			if (ret)
-				DRM_ERROR("Restoring old state failed with %i\n", ret);
+		if (ret)
+			DRM_ERROR("Restoring old state failed with %i\n", ret);
 	} else {
 		/*
 		 * The display has been reset as well,
@@ -3804,15 +3804,14 @@ unlock:
 	clear_bit(I915_RESET_MODESET, &dev_priv->gpu_error.flags);
 }
 
-static void intel_update_pipe_config(struct intel_crtc *crtc,
-				     struct intel_crtc_state *old_crtc_state)
+static void intel_update_pipe_config(const struct intel_crtc_state *old_crtc_state,
+				     const struct intel_crtc_state *new_crtc_state)
 {
+	struct intel_crtc *crtc = to_intel_crtc(new_crtc_state->base.crtc);
 	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
-	struct intel_crtc_state *pipe_config =
-		to_intel_crtc_state(crtc->base.state);
 
 	/* drm_atomic_helper_update_legacy_modeset_state might not be called. */
-	crtc->base.mode = crtc->base.state->mode;
+	crtc->base.mode = new_crtc_state->base.mode;
 
 	/*
 	 * Update pipe size and adjust fitter if needed: the reason for this is
@@ -3824,17 +3823,17 @@ static void intel_update_pipe_config(struct intel_crtc *crtc,
 	 */
 
 	I915_WRITE(PIPESRC(crtc->pipe),
-		   ((pipe_config->pipe_src_w - 1) << 16) |
-		   (pipe_config->pipe_src_h - 1));
+		   ((new_crtc_state->pipe_src_w - 1) << 16) |
+		   (new_crtc_state->pipe_src_h - 1));
 
 	/* on skylake this is done by detaching scalers */
 	if (INTEL_GEN(dev_priv) >= 9) {
 		skl_detach_scalers(crtc);
 
-		if (pipe_config->pch_pfit.enabled)
+		if (new_crtc_state->pch_pfit.enabled)
 			skylake_pfit_enable(crtc);
 	} else if (HAS_PCH_SPLIT(dev_priv)) {
-		if (pipe_config->pch_pfit.enabled)
+		if (new_crtc_state->pch_pfit.enabled)
 			ironlake_pfit_enable(crtc);
 		else if (old_crtc_state->pch_pfit.enabled)
 			ironlake_pfit_disable(crtc, true);
@@ -5118,7 +5117,8 @@ static void intel_post_plane_update(struct intel_crtc_state *old_crtc_state)
 	struct intel_crtc *crtc = to_intel_crtc(old_crtc_state->base.crtc);
 	struct drm_atomic_state *old_state = old_crtc_state->base.state;
 	struct intel_crtc_state *pipe_config =
-		to_intel_crtc_state(crtc->base.state);
+		intel_atomic_get_new_crtc_state(to_intel_atomic_state(old_state),
+						crtc);
 	struct drm_plane *primary = crtc->base.primary;
 	struct drm_plane_state *old_pri_state =
 		drm_atomic_get_existing_plane_state(old_state, primary);
@@ -5130,7 +5130,8 @@ static void intel_post_plane_update(struct intel_crtc_state *old_crtc_state)
 
 	if (old_pri_state) {
 		struct intel_plane_state *primary_state =
-			to_intel_plane_state(primary->state);
+			intel_atomic_get_new_plane_state(to_intel_atomic_state(old_state),
+							 to_intel_plane(primary));
 		struct intel_plane_state *old_primary_state =
 			to_intel_plane_state(old_pri_state);
 
@@ -5159,7 +5160,8 @@ static void intel_pre_plane_update(struct intel_crtc_state *old_crtc_state,
 
 	if (old_pri_state) {
 		struct intel_plane_state *primary_state =
-			to_intel_plane_state(primary->state);
+			intel_atomic_get_new_plane_state(old_intel_state,
+							 to_intel_plane(primary));
 		struct intel_plane_state *old_primary_state =
 			to_intel_plane_state(old_pri_state);
 
@@ -6038,7 +6040,7 @@ static void intel_crtc_disable_noatomic(struct drm_crtc *crtc,
 	intel_crtc->enabled_power_domains = 0;
 
 	dev_priv->active_crtcs &= ~(1 << intel_crtc->pipe);
-	dev_priv->min_pixclk[intel_crtc->pipe] = 0;
+	dev_priv->min_cdclk[intel_crtc->pipe] = 0;
 }
 
 /*
@@ -6283,6 +6285,9 @@ retry:
 static bool pipe_config_supports_ips(struct drm_i915_private *dev_priv,
 				     struct intel_crtc_state *pipe_config)
 {
+	if (pipe_config->ips_force_disable)
+		return false;
+
 	if (pipe_config->pipe_bpp > 24)
 		return false;
 
@@ -9039,7 +9044,7 @@ static void cannonlake_get_ddi_pll(struct drm_i915_private *dev_priv,
 	u32 temp;
 
 	temp = I915_READ(DPCLKA_CFGCR0) & DPCLKA_CFGCR0_DDI_CLK_SEL_MASK(port);
-	id = temp >> (port * 2);
+	id = temp >> DPCLKA_CFGCR0_DDI_CLK_SEL_SHIFT(port);
 
 	if (WARN_ON(id < SKL_DPLL0 || id > SKL_DPLL2))
 		return;
@@ -9753,7 +9758,7 @@ static void i9xx_disable_cursor(struct intel_plane *plane,
 
 
 /* VESA 640x480x72Hz mode to set on the pipe */
-static struct drm_display_mode load_detect_mode = {
+static const struct drm_display_mode load_detect_mode = {
 	DRM_MODE("640x480", DRM_MODE_TYPE_DEFAULT, 31500, 640, 664,
 		 704, 832, 0, 480, 489, 491, 520, 0, DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC),
 };
@@ -9788,7 +9793,7 @@ intel_framebuffer_pitch_for_width(int width, int bpp)
 }
 
 static u32
-intel_framebuffer_size_for_mode(struct drm_display_mode *mode, int bpp)
+intel_framebuffer_size_for_mode(const struct drm_display_mode *mode, int bpp)
 {
 	u32 pitch = intel_framebuffer_pitch_for_width(mode->hdisplay, bpp);
 	return PAGE_ALIGN(pitch * mode->vdisplay);
@@ -9796,7 +9801,7 @@ intel_framebuffer_size_for_mode(struct drm_display_mode *mode, int bpp)
 
 static struct drm_framebuffer *
 intel_framebuffer_create_for_mode(struct drm_device *dev,
-				  struct drm_display_mode *mode,
+				  const struct drm_display_mode *mode,
 				  int depth, int bpp)
 {
 	struct drm_framebuffer *fb;
@@ -9823,7 +9828,7 @@ intel_framebuffer_create_for_mode(struct drm_device *dev,
 
 static struct drm_framebuffer *
 mode_fits_in_fbdev(struct drm_device *dev,
-		   struct drm_display_mode *mode)
+		   const struct drm_display_mode *mode)
 {
 #ifdef CONFIG_DRM_FBDEV_EMULATION
 	struct drm_i915_private *dev_priv = to_i915(dev);
@@ -9856,7 +9861,7 @@ mode_fits_in_fbdev(struct drm_device *dev,
 
 static int intel_modeset_setup_plane_state(struct drm_atomic_state *state,
 					   struct drm_crtc *crtc,
-					   struct drm_display_mode *mode,
+					   const struct drm_display_mode *mode,
 					   struct drm_framebuffer *fb,
 					   int x, int y)
 {
@@ -9890,7 +9895,7 @@ static int intel_modeset_setup_plane_state(struct drm_atomic_state *state,
 }
 
 int intel_get_load_detect_pipe(struct drm_connector *connector,
-			       struct drm_display_mode *mode,
+			       const struct drm_display_mode *mode,
 			       struct intel_load_detect_pipe *old,
 			       struct drm_modeset_acquire_ctx *ctx)
 {
@@ -10337,7 +10342,7 @@ static bool intel_wm_need_update(struct drm_plane *plane,
 	return false;
 }
 
-static bool needs_scaling(struct intel_plane_state *state)
+static bool needs_scaling(const struct intel_plane_state *state)
 {
 	int src_w = drm_rect_width(&state->base.src) >> 16;
 	int src_h = drm_rect_height(&state->base.src) >> 16;
@@ -10347,7 +10352,9 @@ static bool needs_scaling(struct intel_plane_state *state)
 	return (src_w != dst_w || src_h != dst_h);
 }
 
-int intel_plane_atomic_calc_changes(struct drm_crtc_state *crtc_state,
+int intel_plane_atomic_calc_changes(const struct intel_crtc_state *old_crtc_state,
+				    struct drm_crtc_state *crtc_state,
+				    const struct intel_plane_state *old_plane_state,
 				    struct drm_plane_state *plane_state)
 {
 	struct intel_crtc_state *pipe_config = to_intel_crtc_state(crtc_state);
@@ -10356,10 +10363,8 @@ int intel_plane_atomic_calc_changes(struct drm_crtc_state *crtc_state,
 	struct intel_plane *plane = to_intel_plane(plane_state->plane);
 	struct drm_device *dev = crtc->dev;
 	struct drm_i915_private *dev_priv = to_i915(dev);
-	struct intel_plane_state *old_plane_state =
-		to_intel_plane_state(plane->base.state);
 	bool mode_changed = needs_modeset(crtc_state);
-	bool was_crtc_enabled = crtc->state->active;
+	bool was_crtc_enabled = old_crtc_state->base.active;
 	bool is_crtc_enabled = crtc_state->active;
 	bool turn_off, turn_on, visible, was_visible;
 	struct drm_framebuffer *fb = plane_state->fb;
@@ -10850,7 +10855,7 @@ clear_intel_crtc_state(struct intel_crtc_state *crtc_state)
 	struct intel_dpll_hw_state dpll_hw_state;
 	struct intel_shared_dpll *shared_dpll;
 	struct intel_crtc_wm_state wm_state;
-	bool force_thru;
+	bool force_thru, ips_force_disable;
 
 	/* FIXME: before the switch to atomic started, a new pipe_config was
 	 * kzalloc'd. Code that depends on any field being zero should be
@@ -10861,6 +10866,7 @@ clear_intel_crtc_state(struct intel_crtc_state *crtc_state)
 	shared_dpll = crtc_state->shared_dpll;
 	dpll_hw_state = crtc_state->dpll_hw_state;
 	force_thru = crtc_state->pch_pfit.force_thru;
+	ips_force_disable = crtc_state->ips_force_disable;
 	if (IS_G4X(dev_priv) ||
 	    IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
 		wm_state = crtc_state->wm;
@@ -10874,6 +10880,7 @@ clear_intel_crtc_state(struct intel_crtc_state *crtc_state)
 	crtc_state->shared_dpll = shared_dpll;
 	crtc_state->dpll_hw_state = dpll_hw_state;
 	crtc_state->pch_pfit.force_thru = force_thru;
+	crtc_state->ips_force_disable = ips_force_disable;
 	if (IS_G4X(dev_priv) ||
 	    IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
 		crtc_state->wm = wm_state;
@@ -12206,7 +12213,7 @@ static void skl_update_crtcs(struct drm_atomic_state *state)
 			unsigned int cmask = drm_crtc_mask(crtc);
 
 			intel_crtc = to_intel_crtc(crtc);
-			cstate = to_intel_crtc_state(crtc->state);
+			cstate = to_intel_crtc_state(new_crtc_state);
 			pipe = intel_crtc->pipe;
 
 			if (updated & cmask || !cstate->base.active)
@@ -12334,7 +12341,7 @@ static void intel_atomic_commit_tail(struct drm_atomic_state *state)
 			intel_check_cpu_fifo_underruns(dev_priv);
 			intel_check_pch_fifo_underruns(dev_priv);
 
-			if (!crtc->state->active) {
+			if (!new_crtc_state->active) {
 				/*
 				 * Make sure we don't call initial_watermarks
 				 * for ILK-style watermark updates.
@@ -12343,7 +12350,7 @@ static void intel_atomic_commit_tail(struct drm_atomic_state *state)
 				 */
 				if (INTEL_GEN(dev_priv) >= 9)
 					dev_priv->display.initial_watermarks(intel_state,
-									     to_intel_crtc_state(crtc->state));
+									     to_intel_crtc_state(new_crtc_state));
 			}
 		}
 	}
@@ -12556,8 +12563,8 @@ static int intel_atomic_commit(struct drm_device *dev,
 	intel_atomic_track_fbs(state);
 
 	if (intel_state->modeset) {
-		memcpy(dev_priv->min_pixclk, intel_state->min_pixclk,
-		       sizeof(intel_state->min_pixclk));
+		memcpy(dev_priv->min_cdclk, intel_state->min_cdclk,
+		       sizeof(intel_state->min_cdclk));
 		dev_priv->active_crtcs = intel_state->active_crtcs;
 		dev_priv->cdclk.logical = intel_state->cdclk.logical;
 		dev_priv->cdclk.actual = intel_state->cdclk.actual;
@@ -12586,6 +12593,58 @@ static const struct drm_crtc_funcs intel_crtc_funcs = {
 	.set_crc_source = intel_crtc_set_crc_source,
 };
 
+struct wait_rps_boost {
+	struct wait_queue_entry wait;
+
+	struct drm_crtc *crtc;
+	struct drm_i915_gem_request *request;
+};
+
+static int do_rps_boost(struct wait_queue_entry *_wait,
+			unsigned mode, int sync, void *key)
+{
+	struct wait_rps_boost *wait = container_of(_wait, typeof(*wait), wait);
+	struct drm_i915_gem_request *rq = wait->request;
+
+	gen6_rps_boost(rq, NULL);
+	i915_gem_request_put(rq);
+
+	drm_crtc_vblank_put(wait->crtc);
+
+	list_del(&wait->wait.entry);
+	kfree(wait);
+	return 1;
+}
+
+static void add_rps_boost_after_vblank(struct drm_crtc *crtc,
+				       struct dma_fence *fence)
+{
+	struct wait_rps_boost *wait;
+
+	if (!dma_fence_is_i915(fence))
+		return;
+
+	if (INTEL_GEN(to_i915(crtc->dev)) < 6)
+		return;
+
+	if (drm_crtc_vblank_get(crtc))
+		return;
+
+	wait = kmalloc(sizeof(*wait), GFP_KERNEL);
+	if (!wait) {
+		drm_crtc_vblank_put(crtc);
+		return;
+	}
+
+	wait->request = to_request(dma_fence_get(fence));
+	wait->crtc = crtc;
+
+	wait->wait.func = do_rps_boost;
+	wait->wait.flags = 0;
+
+	add_wait_queue(drm_crtc_vblank_waitqueue(crtc), &wait->wait);
+}
+
 /**
  * intel_prepare_plane_fb - Prepare fb for usage on plane
  * @plane: drm plane to prepare for
@@ -12683,12 +12742,22 @@ intel_prepare_plane_fb(struct drm_plane *plane,
 		return ret;
 
 	if (!new_state->fence) { /* implicit fencing */
+		struct dma_fence *fence;
+
 		ret = i915_sw_fence_await_reservation(&intel_state->commit_ready,
 						      obj->resv, NULL,
 						      false, I915_FENCE_TIMEOUT,
 						      GFP_KERNEL);
 		if (ret < 0)
 			return ret;
+
+		fence = reservation_object_get_excl_rcu(obj->resv);
+		if (fence) {
+			add_rps_boost_after_vblank(new_state->crtc, fence);
+			dma_fence_put(fence);
+		}
+	} else {
+		add_rps_boost_after_vblank(new_state->crtc, new_state->fence);
 	}
 
 	return 0;
@@ -12805,29 +12874,29 @@ static void intel_begin_crtc_commit(struct drm_crtc *crtc,
 	struct drm_device *dev = crtc->dev;
 	struct drm_i915_private *dev_priv = to_i915(dev);
 	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
-	struct intel_crtc_state *intel_cstate =
-		to_intel_crtc_state(crtc->state);
 	struct intel_crtc_state *old_intel_cstate =
 		to_intel_crtc_state(old_crtc_state);
 	struct intel_atomic_state *old_intel_state =
 		to_intel_atomic_state(old_crtc_state->state);
-	bool modeset = needs_modeset(crtc->state);
+	struct intel_crtc_state *intel_cstate =
+		intel_atomic_get_new_crtc_state(old_intel_state, intel_crtc);
+	bool modeset = needs_modeset(&intel_cstate->base);
 
 	if (!modeset &&
 	    (intel_cstate->base.color_mgmt_changed ||
 	     intel_cstate->update_pipe)) {
-		intel_color_set_csc(crtc->state);
-		intel_color_load_luts(crtc->state);
+		intel_color_set_csc(&intel_cstate->base);
+		intel_color_load_luts(&intel_cstate->base);
 	}
 
 	/* Perform vblank evasion around commit operation */
-	intel_pipe_update_start(intel_crtc);
+	intel_pipe_update_start(intel_cstate);
 
 	if (modeset)
 		goto out;
 
 	if (intel_cstate->update_pipe)
-		intel_update_pipe_config(intel_crtc, old_intel_cstate);
+		intel_update_pipe_config(old_intel_cstate, intel_cstate);
 	else if (INTEL_GEN(dev_priv) >= 9)
 		skl_detach_scalers(intel_crtc);
 
@@ -12841,8 +12910,12 @@ static void intel_finish_crtc_commit(struct drm_crtc *crtc,
 				     struct drm_crtc_state *old_crtc_state)
 {
 	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+	struct intel_atomic_state *old_intel_state =
+		to_intel_atomic_state(old_crtc_state->state);
+	struct intel_crtc_state *new_crtc_state =
+		intel_atomic_get_new_crtc_state(old_intel_state, intel_crtc);
 
-	intel_pipe_update_end(intel_crtc);
+	intel_pipe_update_end(new_crtc_state);
 }
 
 /**
@@ -13029,6 +13102,8 @@ intel_legacy_cursor_update(struct drm_plane *plane,
 	new_plane_state->crtc_h = crtc_h;
 
 	ret = intel_plane_atomic_check_with_state(to_intel_crtc_state(crtc->state),
+						  to_intel_crtc_state(crtc->state), /* FIXME need a new crtc state? */
+						  to_intel_plane_state(plane->state),
 						  to_intel_plane_state(new_plane_state));
 	if (ret)
 		goto out_free;
@@ -13600,7 +13675,7 @@ static void intel_setup_outputs(struct drm_i915_private *dev_priv)
 
 	} else if (HAS_PCH_SPLIT(dev_priv)) {
 		int found;
-		dpd_is_edp = intel_dp_is_edp(dev_priv, PORT_D);
+		dpd_is_edp = intel_dp_is_port_edp(dev_priv, PORT_D);
 
 		if (has_edp_a(dev_priv))
 			intel_dp_init(dev_priv, DP_A, PORT_A);
@@ -13643,14 +13718,14 @@ static void intel_setup_outputs(struct drm_i915_private *dev_priv)
 		 * trust the port type the VBT declares as we've seen at least
 		 * HDMI ports that the VBT claim are DP or eDP.
 		 */
-		has_edp = intel_dp_is_edp(dev_priv, PORT_B);
+		has_edp = intel_dp_is_port_edp(dev_priv, PORT_B);
 		has_port = intel_bios_is_port_present(dev_priv, PORT_B);
 		if (I915_READ(VLV_DP_B) & DP_DETECTED || has_port)
 			has_edp &= intel_dp_init(dev_priv, VLV_DP_B, PORT_B);
 		if ((I915_READ(VLV_HDMIB) & SDVO_DETECTED || has_port) && !has_edp)
 			intel_hdmi_init(dev_priv, VLV_HDMIB, PORT_B);
 
-		has_edp = intel_dp_is_edp(dev_priv, PORT_C);
+		has_edp = intel_dp_is_port_edp(dev_priv, PORT_C);
 		has_port = intel_bios_is_port_present(dev_priv, PORT_C);
 		if (I915_READ(VLV_DP_C) & DP_DETECTED || has_port)
 			has_edp &= intel_dp_init(dev_priv, VLV_DP_C, PORT_C);
@@ -14967,7 +15042,7 @@ static void intel_modeset_readout_hw_state(struct drm_device *dev)
 	for_each_intel_crtc(dev, crtc) {
 		struct intel_crtc_state *crtc_state =
 			to_intel_crtc_state(crtc->base.state);
-		int pixclk = 0;
+		int min_cdclk = 0;
 
 		memset(&crtc->base.mode, 0, sizeof(crtc->base.mode));
 		if (crtc_state->base.active) {
@@ -14988,22 +15063,18 @@ static void intel_modeset_readout_hw_state(struct drm_device *dev)
 
 			intel_crtc_compute_pixel_rate(crtc_state);
 
-			if (INTEL_GEN(dev_priv) >= 9 || IS_BROADWELL(dev_priv) ||
-			    IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
-				pixclk = crtc_state->pixel_rate;
-			else
-				WARN_ON(dev_priv->display.modeset_calc_cdclk);
-
-			/* pixel rate mustn't exceed 95% of cdclk with IPS on BDW */
-			if (IS_BROADWELL(dev_priv) && crtc_state->ips_enabled)
-				pixclk = DIV_ROUND_UP(pixclk * 100, 95);
+			if (dev_priv->display.modeset_calc_cdclk) {
+				min_cdclk = intel_crtc_compute_min_cdclk(crtc_state);
+				if (WARN_ON(min_cdclk < 0))
+					min_cdclk = 0;
+			}
 
 			drm_calc_timestamping_constants(&crtc->base,
 							&crtc_state->base.adjusted_mode);
 			update_scanline_offset(crtc);
 		}
 
-		dev_priv->min_pixclk[crtc->pipe] = pixclk;
+		dev_priv->min_cdclk[crtc->pipe] = min_cdclk;
 
 		intel_pipe_config_sanity_check(dev_priv, crtc_state);
 	}