diff mbox series

[03/11] drm/i915: split fdi code out from intel_display.c

Message ID 20210114090522.22750-4-airlied@gmail.com (mailing list archive)
State New, archived
Headers show
Series [01/11] drm/i915: refactor some crtc code out of intel display. (v2) | expand

Commit Message

Dave Airlie Jan. 14, 2021, 9:05 a.m. UTC 
From: Dave Airlie <airlied@redhat.com>

This just refactors out the fdi code to a separate file.

Signed-off-by: Dave Airlie <airlied@redhat.com>
[Jani: cleaned up intel_fdi.h a bit.]
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/Makefile                 |   1 +
 drivers/gpu/drm/i915/display/intel_display.c  | 685 +-----------------
 .../drm/i915/display/intel_display_types.h    |   9 +
 drivers/gpu/drm/i915/display/intel_fdi.c      | 683 +++++++++++++++++
 drivers/gpu/drm/i915/display/intel_fdi.h      |  22 +
 5 files changed, 718 insertions(+), 682 deletions(-)
 create mode 100644 drivers/gpu/drm/i915/display/intel_fdi.c
 create mode 100644 drivers/gpu/drm/i915/display/intel_fdi.h
diff mbox series

Patch

diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
index 0483d2ccf71b..32a041609df6 100644
--- a/drivers/gpu/drm/i915/Makefile
+++ b/drivers/gpu/drm/i915/Makefile
@@ -206,6 +206,7 @@  i915-y += \
 	display/intel_dpll_mgr.o \
 	display/intel_dsb.o \
 	display/intel_fbc.o \
+	display/intel_fdi.o \
 	display/intel_fifo_underrun.o \
 	display/intel_frontbuffer.o \
 	display/intel_global_state.o \
diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 9867fd7f990f..74473290c9a0 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -74,6 +74,7 @@ 
 #include "intel_display_types.h"
 #include "intel_dp_link_training.h"
 #include "intel_fbc.h"
+#include "intel_fdi.h"
 #include "intel_fbdev.h"
 #include "intel_fifo_underrun.h"
 #include "intel_frontbuffer.h"
@@ -173,16 +174,6 @@  static void intel_update_czclk(struct drm_i915_private *dev_priv)
 		dev_priv->czclk_freq);
 }
 
-/* units of 100MHz */
-static u32 intel_fdi_link_freq(struct drm_i915_private *dev_priv,
-			       const struct intel_crtc_state *pipe_config)
-{
-	if (HAS_DDI(dev_priv))
-		return pipe_config->port_clock; /* SPLL */
-	else
-		return dev_priv->fdi_pll_freq;
-}
-
 /* WA Display #0827: Gen9:all */
 static void
 skl_wa_827(struct drm_i915_private *dev_priv, enum pipe pipe, bool enable)
@@ -3727,532 +3718,6 @@  static void icl_set_pipe_chicken(struct intel_crtc *crtc)
 	intel_de_write(dev_priv, PIPE_CHICKEN(pipe), tmp);
 }
 
-static void intel_fdi_normal_train(struct intel_crtc *crtc)
-{
-	struct drm_device *dev = crtc->base.dev;
-	struct drm_i915_private *dev_priv = to_i915(dev);
-	enum pipe pipe = crtc->pipe;
-	i915_reg_t reg;
-	u32 temp;
-
-	/* enable normal train */
-	reg = FDI_TX_CTL(pipe);
-	temp = intel_de_read(dev_priv, reg);
-	if (IS_IVYBRIDGE(dev_priv)) {
-		temp &= ~FDI_LINK_TRAIN_NONE_IVB;
-		temp |= FDI_LINK_TRAIN_NONE_IVB | FDI_TX_ENHANCE_FRAME_ENABLE;
-	} else {
-		temp &= ~FDI_LINK_TRAIN_NONE;
-		temp |= FDI_LINK_TRAIN_NONE | FDI_TX_ENHANCE_FRAME_ENABLE;
-	}
-	intel_de_write(dev_priv, reg, temp);
-
-	reg = FDI_RX_CTL(pipe);
-	temp = intel_de_read(dev_priv, reg);
-	if (HAS_PCH_CPT(dev_priv)) {
-		temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
-		temp |= FDI_LINK_TRAIN_NORMAL_CPT;
-	} else {
-		temp &= ~FDI_LINK_TRAIN_NONE;
-		temp |= FDI_LINK_TRAIN_NONE;
-	}
-	intel_de_write(dev_priv, reg, temp | FDI_RX_ENHANCE_FRAME_ENABLE);
-
-	/* wait one idle pattern time */
-	intel_de_posting_read(dev_priv, reg);
-	udelay(1000);
-
-	/* IVB wants error correction enabled */
-	if (IS_IVYBRIDGE(dev_priv))
-		intel_de_write(dev_priv, reg,
-		               intel_de_read(dev_priv, reg) | FDI_FS_ERRC_ENABLE | FDI_FE_ERRC_ENABLE);
-}
-
-/* The FDI link training functions for ILK/Ibexpeak. */
-static void ilk_fdi_link_train(struct intel_crtc *crtc,
-			       const struct intel_crtc_state *crtc_state)
-{
-	struct drm_device *dev = crtc->base.dev;
-	struct drm_i915_private *dev_priv = to_i915(dev);
-	enum pipe pipe = crtc->pipe;
-	i915_reg_t reg;
-	u32 temp, tries;
-
-	/* FDI needs bits from pipe first */
-	assert_pipe_enabled(dev_priv, crtc_state->cpu_transcoder);
-
-	/* Train 1: umask FDI RX Interrupt symbol_lock and bit_lock bit
-	   for train result */
-	reg = FDI_RX_IMR(pipe);
-	temp = intel_de_read(dev_priv, reg);
-	temp &= ~FDI_RX_SYMBOL_LOCK;
-	temp &= ~FDI_RX_BIT_LOCK;
-	intel_de_write(dev_priv, reg, temp);
-	intel_de_read(dev_priv, reg);
-	udelay(150);
-
-	/* enable CPU FDI TX and PCH FDI RX */
-	reg = FDI_TX_CTL(pipe);
-	temp = intel_de_read(dev_priv, reg);
-	temp &= ~FDI_DP_PORT_WIDTH_MASK;
-	temp |= FDI_DP_PORT_WIDTH(crtc_state->fdi_lanes);
-	temp &= ~FDI_LINK_TRAIN_NONE;
-	temp |= FDI_LINK_TRAIN_PATTERN_1;
-	intel_de_write(dev_priv, reg, temp | FDI_TX_ENABLE);
-
-	reg = FDI_RX_CTL(pipe);
-	temp = intel_de_read(dev_priv, reg);
-	temp &= ~FDI_LINK_TRAIN_NONE;
-	temp |= FDI_LINK_TRAIN_PATTERN_1;
-	intel_de_write(dev_priv, reg, temp | FDI_RX_ENABLE);
-
-	intel_de_posting_read(dev_priv, reg);
-	udelay(150);
-
-	/* Ironlake workaround, enable clock pointer after FDI enable*/
-	intel_de_write(dev_priv, FDI_RX_CHICKEN(pipe),
-		       FDI_RX_PHASE_SYNC_POINTER_OVR);
-	intel_de_write(dev_priv, FDI_RX_CHICKEN(pipe),
-		       FDI_RX_PHASE_SYNC_POINTER_OVR | FDI_RX_PHASE_SYNC_POINTER_EN);
-
-	reg = FDI_RX_IIR(pipe);
-	for (tries = 0; tries < 5; tries++) {
-		temp = intel_de_read(dev_priv, reg);
-		drm_dbg_kms(&dev_priv->drm, "FDI_RX_IIR 0x%x\n", temp);
-
-		if ((temp & FDI_RX_BIT_LOCK)) {
-			drm_dbg_kms(&dev_priv->drm, "FDI train 1 done.\n");
-			intel_de_write(dev_priv, reg, temp | FDI_RX_BIT_LOCK);
-			break;
-		}
-	}
-	if (tries == 5)
-		drm_err(&dev_priv->drm, "FDI train 1 fail!\n");
-
-	/* Train 2 */
-	reg = FDI_TX_CTL(pipe);
-	temp = intel_de_read(dev_priv, reg);
-	temp &= ~FDI_LINK_TRAIN_NONE;
-	temp |= FDI_LINK_TRAIN_PATTERN_2;
-	intel_de_write(dev_priv, reg, temp);
-
-	reg = FDI_RX_CTL(pipe);
-	temp = intel_de_read(dev_priv, reg);
-	temp &= ~FDI_LINK_TRAIN_NONE;
-	temp |= FDI_LINK_TRAIN_PATTERN_2;
-	intel_de_write(dev_priv, reg, temp);
-
-	intel_de_posting_read(dev_priv, reg);
-	udelay(150);
-
-	reg = FDI_RX_IIR(pipe);
-	for (tries = 0; tries < 5; tries++) {
-		temp = intel_de_read(dev_priv, reg);
-		drm_dbg_kms(&dev_priv->drm, "FDI_RX_IIR 0x%x\n", temp);
-
-		if (temp & FDI_RX_SYMBOL_LOCK) {
-			intel_de_write(dev_priv, reg,
-				       temp | FDI_RX_SYMBOL_LOCK);
-			drm_dbg_kms(&dev_priv->drm, "FDI train 2 done.\n");
-			break;
-		}
-	}
-	if (tries == 5)
-		drm_err(&dev_priv->drm, "FDI train 2 fail!\n");
-
-	drm_dbg_kms(&dev_priv->drm, "FDI train done\n");
-
-}
-
-static const int snb_b_fdi_train_param[] = {
-	FDI_LINK_TRAIN_400MV_0DB_SNB_B,
-	FDI_LINK_TRAIN_400MV_6DB_SNB_B,
-	FDI_LINK_TRAIN_600MV_3_5DB_SNB_B,
-	FDI_LINK_TRAIN_800MV_0DB_SNB_B,
-};
-
-/* The FDI link training functions for SNB/Cougarpoint. */
-static void gen6_fdi_link_train(struct intel_crtc *crtc,
-				const struct intel_crtc_state *crtc_state)
-{
-	struct drm_device *dev = crtc->base.dev;
-	struct drm_i915_private *dev_priv = to_i915(dev);
-	enum pipe pipe = crtc->pipe;
-	i915_reg_t reg;
-	u32 temp, i, retry;
-
-	/* Train 1: umask FDI RX Interrupt symbol_lock and bit_lock bit
-	   for train result */
-	reg = FDI_RX_IMR(pipe);
-	temp = intel_de_read(dev_priv, reg);
-	temp &= ~FDI_RX_SYMBOL_LOCK;
-	temp &= ~FDI_RX_BIT_LOCK;
-	intel_de_write(dev_priv, reg, temp);
-
-	intel_de_posting_read(dev_priv, reg);
-	udelay(150);
-
-	/* enable CPU FDI TX and PCH FDI RX */
-	reg = FDI_TX_CTL(pipe);
-	temp = intel_de_read(dev_priv, reg);
-	temp &= ~FDI_DP_PORT_WIDTH_MASK;
-	temp |= FDI_DP_PORT_WIDTH(crtc_state->fdi_lanes);
-	temp &= ~FDI_LINK_TRAIN_NONE;
-	temp |= FDI_LINK_TRAIN_PATTERN_1;
-	temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
-	/* SNB-B */
-	temp |= FDI_LINK_TRAIN_400MV_0DB_SNB_B;
-	intel_de_write(dev_priv, reg, temp | FDI_TX_ENABLE);
-
-	intel_de_write(dev_priv, FDI_RX_MISC(pipe),
-		       FDI_RX_TP1_TO_TP2_48 | FDI_RX_FDI_DELAY_90);
-
-	reg = FDI_RX_CTL(pipe);
-	temp = intel_de_read(dev_priv, reg);
-	if (HAS_PCH_CPT(dev_priv)) {
-		temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
-		temp |= FDI_LINK_TRAIN_PATTERN_1_CPT;
-	} else {
-		temp &= ~FDI_LINK_TRAIN_NONE;
-		temp |= FDI_LINK_TRAIN_PATTERN_1;
-	}
-	intel_de_write(dev_priv, reg, temp | FDI_RX_ENABLE);
-
-	intel_de_posting_read(dev_priv, reg);
-	udelay(150);
-
-	for (i = 0; i < 4; i++) {
-		reg = FDI_TX_CTL(pipe);
-		temp = intel_de_read(dev_priv, reg);
-		temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
-		temp |= snb_b_fdi_train_param[i];
-		intel_de_write(dev_priv, reg, temp);
-
-		intel_de_posting_read(dev_priv, reg);
-		udelay(500);
-
-		for (retry = 0; retry < 5; retry++) {
-			reg = FDI_RX_IIR(pipe);
-			temp = intel_de_read(dev_priv, reg);
-			drm_dbg_kms(&dev_priv->drm, "FDI_RX_IIR 0x%x\n", temp);
-			if (temp & FDI_RX_BIT_LOCK) {
-				intel_de_write(dev_priv, reg,
-					       temp | FDI_RX_BIT_LOCK);
-				drm_dbg_kms(&dev_priv->drm,
-					    "FDI train 1 done.\n");
-				break;
-			}
-			udelay(50);
-		}
-		if (retry < 5)
-			break;
-	}
-	if (i == 4)
-		drm_err(&dev_priv->drm, "FDI train 1 fail!\n");
-
-	/* Train 2 */
-	reg = FDI_TX_CTL(pipe);
-	temp = intel_de_read(dev_priv, reg);
-	temp &= ~FDI_LINK_TRAIN_NONE;
-	temp |= FDI_LINK_TRAIN_PATTERN_2;
-	if (IS_GEN(dev_priv, 6)) {
-		temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
-		/* SNB-B */
-		temp |= FDI_LINK_TRAIN_400MV_0DB_SNB_B;
-	}
-	intel_de_write(dev_priv, reg, temp);
-
-	reg = FDI_RX_CTL(pipe);
-	temp = intel_de_read(dev_priv, reg);
-	if (HAS_PCH_CPT(dev_priv)) {
-		temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
-		temp |= FDI_LINK_TRAIN_PATTERN_2_CPT;
-	} else {
-		temp &= ~FDI_LINK_TRAIN_NONE;
-		temp |= FDI_LINK_TRAIN_PATTERN_2;
-	}
-	intel_de_write(dev_priv, reg, temp);
-
-	intel_de_posting_read(dev_priv, reg);
-	udelay(150);
-
-	for (i = 0; i < 4; i++) {
-		reg = FDI_TX_CTL(pipe);
-		temp = intel_de_read(dev_priv, reg);
-		temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
-		temp |= snb_b_fdi_train_param[i];
-		intel_de_write(dev_priv, reg, temp);
-
-		intel_de_posting_read(dev_priv, reg);
-		udelay(500);
-
-		for (retry = 0; retry < 5; retry++) {
-			reg = FDI_RX_IIR(pipe);
-			temp = intel_de_read(dev_priv, reg);
-			drm_dbg_kms(&dev_priv->drm, "FDI_RX_IIR 0x%x\n", temp);
-			if (temp & FDI_RX_SYMBOL_LOCK) {
-				intel_de_write(dev_priv, reg,
-					       temp | FDI_RX_SYMBOL_LOCK);
-				drm_dbg_kms(&dev_priv->drm,
-					    "FDI train 2 done.\n");
-				break;
-			}
-			udelay(50);
-		}
-		if (retry < 5)
-			break;
-	}
-	if (i == 4)
-		drm_err(&dev_priv->drm, "FDI train 2 fail!\n");
-
-	drm_dbg_kms(&dev_priv->drm, "FDI train done.\n");
-}
-
-/* Manual link training for Ivy Bridge A0 parts */
-static void ivb_manual_fdi_link_train(struct intel_crtc *crtc,
-				      const struct intel_crtc_state *crtc_state)
-{
-	struct drm_device *dev = crtc->base.dev;
-	struct drm_i915_private *dev_priv = to_i915(dev);
-	enum pipe pipe = crtc->pipe;
-	i915_reg_t reg;
-	u32 temp, i, j;
-
-	/* Train 1: umask FDI RX Interrupt symbol_lock and bit_lock bit
-	   for train result */
-	reg = FDI_RX_IMR(pipe);
-	temp = intel_de_read(dev_priv, reg);
-	temp &= ~FDI_RX_SYMBOL_LOCK;
-	temp &= ~FDI_RX_BIT_LOCK;
-	intel_de_write(dev_priv, reg, temp);
-
-	intel_de_posting_read(dev_priv, reg);
-	udelay(150);
-
-	drm_dbg_kms(&dev_priv->drm, "FDI_RX_IIR before link train 0x%x\n",
-		    intel_de_read(dev_priv, FDI_RX_IIR(pipe)));
-
-	/* Try each vswing and preemphasis setting twice before moving on */
-	for (j = 0; j < ARRAY_SIZE(snb_b_fdi_train_param) * 2; j++) {
-		/* disable first in case we need to retry */
-		reg = FDI_TX_CTL(pipe);
-		temp = intel_de_read(dev_priv, reg);
-		temp &= ~(FDI_LINK_TRAIN_AUTO | FDI_LINK_TRAIN_NONE_IVB);
-		temp &= ~FDI_TX_ENABLE;
-		intel_de_write(dev_priv, reg, temp);
-
-		reg = FDI_RX_CTL(pipe);
-		temp = intel_de_read(dev_priv, reg);
-		temp &= ~FDI_LINK_TRAIN_AUTO;
-		temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
-		temp &= ~FDI_RX_ENABLE;
-		intel_de_write(dev_priv, reg, temp);
-
-		/* enable CPU FDI TX and PCH FDI RX */
-		reg = FDI_TX_CTL(pipe);
-		temp = intel_de_read(dev_priv, reg);
-		temp &= ~FDI_DP_PORT_WIDTH_MASK;
-		temp |= FDI_DP_PORT_WIDTH(crtc_state->fdi_lanes);
-		temp |= FDI_LINK_TRAIN_PATTERN_1_IVB;
-		temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
-		temp |= snb_b_fdi_train_param[j/2];
-		temp |= FDI_COMPOSITE_SYNC;
-		intel_de_write(dev_priv, reg, temp | FDI_TX_ENABLE);
-
-		intel_de_write(dev_priv, FDI_RX_MISC(pipe),
-			       FDI_RX_TP1_TO_TP2_48 | FDI_RX_FDI_DELAY_90);
-
-		reg = FDI_RX_CTL(pipe);
-		temp = intel_de_read(dev_priv, reg);
-		temp |= FDI_LINK_TRAIN_PATTERN_1_CPT;
-		temp |= FDI_COMPOSITE_SYNC;
-		intel_de_write(dev_priv, reg, temp | FDI_RX_ENABLE);
-
-		intel_de_posting_read(dev_priv, reg);
-		udelay(1); /* should be 0.5us */
-
-		for (i = 0; i < 4; i++) {
-			reg = FDI_RX_IIR(pipe);
-			temp = intel_de_read(dev_priv, reg);
-			drm_dbg_kms(&dev_priv->drm, "FDI_RX_IIR 0x%x\n", temp);
-
-			if (temp & FDI_RX_BIT_LOCK ||
-			    (intel_de_read(dev_priv, reg) & FDI_RX_BIT_LOCK)) {
-				intel_de_write(dev_priv, reg,
-					       temp | FDI_RX_BIT_LOCK);
-				drm_dbg_kms(&dev_priv->drm,
-					    "FDI train 1 done, level %i.\n",
-					    i);
-				break;
-			}
-			udelay(1); /* should be 0.5us */
-		}
-		if (i == 4) {
-			drm_dbg_kms(&dev_priv->drm,
-				    "FDI train 1 fail on vswing %d\n", j / 2);
-			continue;
-		}
-
-		/* Train 2 */
-		reg = FDI_TX_CTL(pipe);
-		temp = intel_de_read(dev_priv, reg);
-		temp &= ~FDI_LINK_TRAIN_NONE_IVB;
-		temp |= FDI_LINK_TRAIN_PATTERN_2_IVB;
-		intel_de_write(dev_priv, reg, temp);
-
-		reg = FDI_RX_CTL(pipe);
-		temp = intel_de_read(dev_priv, reg);
-		temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
-		temp |= FDI_LINK_TRAIN_PATTERN_2_CPT;
-		intel_de_write(dev_priv, reg, temp);
-
-		intel_de_posting_read(dev_priv, reg);
-		udelay(2); /* should be 1.5us */
-
-		for (i = 0; i < 4; i++) {
-			reg = FDI_RX_IIR(pipe);
-			temp = intel_de_read(dev_priv, reg);
-			drm_dbg_kms(&dev_priv->drm, "FDI_RX_IIR 0x%x\n", temp);
-
-			if (temp & FDI_RX_SYMBOL_LOCK ||
-			    (intel_de_read(dev_priv, reg) & FDI_RX_SYMBOL_LOCK)) {
-				intel_de_write(dev_priv, reg,
-					       temp | FDI_RX_SYMBOL_LOCK);
-				drm_dbg_kms(&dev_priv->drm,
-					    "FDI train 2 done, level %i.\n",
-					    i);
-				goto train_done;
-			}
-			udelay(2); /* should be 1.5us */
-		}
-		if (i == 4)
-			drm_dbg_kms(&dev_priv->drm,
-				    "FDI train 2 fail on vswing %d\n", j / 2);
-	}
-
-train_done:
-	drm_dbg_kms(&dev_priv->drm, "FDI train done.\n");
-}
-
-static void ilk_fdi_pll_enable(const struct intel_crtc_state *crtc_state)
-{
-	struct intel_crtc *intel_crtc = to_intel_crtc(crtc_state->uapi.crtc);
-	struct drm_i915_private *dev_priv = to_i915(intel_crtc->base.dev);
-	enum pipe pipe = intel_crtc->pipe;
-	i915_reg_t reg;
-	u32 temp;
-
-	/* enable PCH FDI RX PLL, wait warmup plus DMI latency */
-	reg = FDI_RX_CTL(pipe);
-	temp = intel_de_read(dev_priv, reg);
-	temp &= ~(FDI_DP_PORT_WIDTH_MASK | (0x7 << 16));
-	temp |= FDI_DP_PORT_WIDTH(crtc_state->fdi_lanes);
-	temp |= (intel_de_read(dev_priv, PIPECONF(pipe)) & PIPECONF_BPC_MASK) << 11;
-	intel_de_write(dev_priv, reg, temp | FDI_RX_PLL_ENABLE);
-
-	intel_de_posting_read(dev_priv, reg);
-	udelay(200);
-
-	/* Switch from Rawclk to PCDclk */
-	temp = intel_de_read(dev_priv, reg);
-	intel_de_write(dev_priv, reg, temp | FDI_PCDCLK);
-
-	intel_de_posting_read(dev_priv, reg);
-	udelay(200);
-
-	/* Enable CPU FDI TX PLL, always on for Ironlake */
-	reg = FDI_TX_CTL(pipe);
-	temp = intel_de_read(dev_priv, reg);
-	if ((temp & FDI_TX_PLL_ENABLE) == 0) {
-		intel_de_write(dev_priv, reg, temp | FDI_TX_PLL_ENABLE);
-
-		intel_de_posting_read(dev_priv, reg);
-		udelay(100);
-	}
-}
-
-static void ilk_fdi_pll_disable(struct intel_crtc *intel_crtc)
-{
-	struct drm_device *dev = intel_crtc->base.dev;
-	struct drm_i915_private *dev_priv = to_i915(dev);
-	enum pipe pipe = intel_crtc->pipe;
-	i915_reg_t reg;
-	u32 temp;
-
-	/* Switch from PCDclk to Rawclk */
-	reg = FDI_RX_CTL(pipe);
-	temp = intel_de_read(dev_priv, reg);
-	intel_de_write(dev_priv, reg, temp & ~FDI_PCDCLK);
-
-	/* Disable CPU FDI TX PLL */
-	reg = FDI_TX_CTL(pipe);
-	temp = intel_de_read(dev_priv, reg);
-	intel_de_write(dev_priv, reg, temp & ~FDI_TX_PLL_ENABLE);
-
-	intel_de_posting_read(dev_priv, reg);
-	udelay(100);
-
-	reg = FDI_RX_CTL(pipe);
-	temp = intel_de_read(dev_priv, reg);
-	intel_de_write(dev_priv, reg, temp & ~FDI_RX_PLL_ENABLE);
-
-	/* Wait for the clocks to turn off. */
-	intel_de_posting_read(dev_priv, reg);
-	udelay(100);
-}
-
-static void ilk_fdi_disable(struct intel_crtc *crtc)
-{
-	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
-	enum pipe pipe = crtc->pipe;
-	i915_reg_t reg;
-	u32 temp;
-
-	/* disable CPU FDI tx and PCH FDI rx */
-	reg = FDI_TX_CTL(pipe);
-	temp = intel_de_read(dev_priv, reg);
-	intel_de_write(dev_priv, reg, temp & ~FDI_TX_ENABLE);
-	intel_de_posting_read(dev_priv, reg);
-
-	reg = FDI_RX_CTL(pipe);
-	temp = intel_de_read(dev_priv, reg);
-	temp &= ~(0x7 << 16);
-	temp |= (intel_de_read(dev_priv, PIPECONF(pipe)) & PIPECONF_BPC_MASK) << 11;
-	intel_de_write(dev_priv, reg, temp & ~FDI_RX_ENABLE);
-
-	intel_de_posting_read(dev_priv, reg);
-	udelay(100);
-
-	/* Ironlake workaround, disable clock pointer after downing FDI */
-	if (HAS_PCH_IBX(dev_priv))
-		intel_de_write(dev_priv, FDI_RX_CHICKEN(pipe),
-			       FDI_RX_PHASE_SYNC_POINTER_OVR);
-
-	/* still set train pattern 1 */
-	reg = FDI_TX_CTL(pipe);
-	temp = intel_de_read(dev_priv, reg);
-	temp &= ~FDI_LINK_TRAIN_NONE;
-	temp |= FDI_LINK_TRAIN_PATTERN_1;
-	intel_de_write(dev_priv, reg, temp);
-
-	reg = FDI_RX_CTL(pipe);
-	temp = intel_de_read(dev_priv, reg);
-	if (HAS_PCH_CPT(dev_priv)) {
-		temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
-		temp |= FDI_LINK_TRAIN_PATTERN_1_CPT;
-	} else {
-		temp &= ~FDI_LINK_TRAIN_NONE;
-		temp |= FDI_LINK_TRAIN_PATTERN_1;
-	}
-	/* BPC in FDI rx is consistent with that in PIPECONF */
-	temp &= ~(0x07 << 16);
-	temp |= (intel_de_read(dev_priv, PIPECONF(pipe)) & PIPECONF_BPC_MASK) << 11;
-	intel_de_write(dev_priv, reg, temp);
-
-	intel_de_posting_read(dev_priv, reg);
-	udelay(100);
-}
-
 bool intel_has_pending_fb_unpin(struct drm_i915_private *dev_priv)
 {
 	struct drm_crtc *crtc;
@@ -6659,143 +6124,6 @@  static void intel_connector_verify_state(struct intel_crtc_state *crtc_state,
 	}
 }
 
-static int pipe_required_fdi_lanes(struct intel_crtc_state *crtc_state)
-{
-	if (crtc_state->hw.enable && crtc_state->has_pch_encoder)
-		return crtc_state->fdi_lanes;
-
-	return 0;
-}
-
-static int ilk_check_fdi_lanes(struct drm_device *dev, enum pipe pipe,
-			       struct intel_crtc_state *pipe_config)
-{
-	struct drm_i915_private *dev_priv = to_i915(dev);
-	struct drm_atomic_state *state = pipe_config->uapi.state;
-	struct intel_crtc *other_crtc;
-	struct intel_crtc_state *other_crtc_state;
-
-	drm_dbg_kms(&dev_priv->drm,
-		    "checking fdi config on pipe %c, lanes %i\n",
-		    pipe_name(pipe), pipe_config->fdi_lanes);
-	if (pipe_config->fdi_lanes > 4) {
-		drm_dbg_kms(&dev_priv->drm,
-			    "invalid fdi lane config on pipe %c: %i lanes\n",
-			    pipe_name(pipe), pipe_config->fdi_lanes);
-		return -EINVAL;
-	}
-
-	if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) {
-		if (pipe_config->fdi_lanes > 2) {
-			drm_dbg_kms(&dev_priv->drm,
-				    "only 2 lanes on haswell, required: %i lanes\n",
-				    pipe_config->fdi_lanes);
-			return -EINVAL;
-		} else {
-			return 0;
-		}
-	}
-
-	if (INTEL_NUM_PIPES(dev_priv) == 2)
-		return 0;
-
-	/* Ivybridge 3 pipe is really complicated */
-	switch (pipe) {
-	case PIPE_A:
-		return 0;
-	case PIPE_B:
-		if (pipe_config->fdi_lanes <= 2)
-			return 0;
-
-		other_crtc = intel_get_crtc_for_pipe(dev_priv, PIPE_C);
-		other_crtc_state =
-			intel_atomic_get_crtc_state(state, other_crtc);
-		if (IS_ERR(other_crtc_state))
-			return PTR_ERR(other_crtc_state);
-
-		if (pipe_required_fdi_lanes(other_crtc_state) > 0) {
-			drm_dbg_kms(&dev_priv->drm,
-				    "invalid shared fdi lane config on pipe %c: %i lanes\n",
-				    pipe_name(pipe), pipe_config->fdi_lanes);
-			return -EINVAL;
-		}
-		return 0;
-	case PIPE_C:
-		if (pipe_config->fdi_lanes > 2) {
-			drm_dbg_kms(&dev_priv->drm,
-				    "only 2 lanes on pipe %c: required %i lanes\n",
-				    pipe_name(pipe), pipe_config->fdi_lanes);
-			return -EINVAL;
-		}
-
-		other_crtc = intel_get_crtc_for_pipe(dev_priv, PIPE_B);
-		other_crtc_state =
-			intel_atomic_get_crtc_state(state, other_crtc);
-		if (IS_ERR(other_crtc_state))
-			return PTR_ERR(other_crtc_state);
-
-		if (pipe_required_fdi_lanes(other_crtc_state) > 2) {
-			drm_dbg_kms(&dev_priv->drm,
-				    "fdi link B uses too many lanes to enable link C\n");
-			return -EINVAL;
-		}
-		return 0;
-	default:
-		BUG();
-	}
-}
-
-#define RETRY 1
-static int ilk_fdi_compute_config(struct intel_crtc *intel_crtc,
-				  struct intel_crtc_state *pipe_config)
-{
-	struct drm_device *dev = intel_crtc->base.dev;
-	struct drm_i915_private *i915 = to_i915(dev);
-	const struct drm_display_mode *adjusted_mode = &pipe_config->hw.adjusted_mode;
-	int lane, link_bw, fdi_dotclock, ret;
-	bool needs_recompute = false;
-
-retry:
-	/* FDI is a binary signal running at ~2.7GHz, encoding
-	 * each output octet as 10 bits. The actual frequency
-	 * is stored as a divider into a 100MHz clock, and the
-	 * mode pixel clock is stored in units of 1KHz.
-	 * Hence the bw of each lane in terms of the mode signal
-	 * is:
-	 */
-	link_bw = intel_fdi_link_freq(i915, pipe_config);
-
-	fdi_dotclock = adjusted_mode->crtc_clock;
-
-	lane = ilk_get_lanes_required(fdi_dotclock, link_bw,
-				      pipe_config->pipe_bpp);
-
-	pipe_config->fdi_lanes = lane;
-
-	intel_link_compute_m_n(pipe_config->pipe_bpp, lane, fdi_dotclock,
-			       link_bw, &pipe_config->fdi_m_n, false, false);
-
-	ret = ilk_check_fdi_lanes(dev, intel_crtc->pipe, pipe_config);
-	if (ret == -EDEADLK)
-		return ret;
-
-	if (ret == -EINVAL && pipe_config->pipe_bpp > 6*3) {
-		pipe_config->pipe_bpp -= 2*3;
-		drm_dbg_kms(&i915->drm,
-			    "fdi link bw constraint, reducing pipe bpp to %i\n",
-			    pipe_config->pipe_bpp);
-		needs_recompute = true;
-		pipe_config->bw_constrained = true;
-
-		goto retry;
-	}
-
-	if (needs_recompute)
-		return RETRY;
-
-	return ret;
-}
-
 bool hsw_crtc_state_ips_capable(const struct intel_crtc_state *crtc_state)
 {
 	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
@@ -11322,7 +10650,7 @@  intel_modeset_pipe_config(struct intel_atomic_state *state,
 		return ret;
 	}
 
-	if (ret == RETRY) {
+	if (ret == I915_DISPLAY_CONFIG_RETRY) {
 		if (drm_WARN(&i915->drm, !retry,
 			     "loop in pipe configuration computation\n"))
 			return -EINVAL;
@@ -15121,14 +14449,7 @@  void intel_init_display_hooks(struct drm_i915_private *dev_priv)
 		dev_priv->display.crtc_disable = i9xx_crtc_disable;
 	}
 
-	if (IS_GEN(dev_priv, 5)) {
-		dev_priv->display.fdi_link_train = ilk_fdi_link_train;
-	} else if (IS_GEN(dev_priv, 6)) {
-		dev_priv->display.fdi_link_train = gen6_fdi_link_train;
-	} else if (IS_IVYBRIDGE(dev_priv)) {
-		/* FIXME: detect B0+ stepping and use auto training */
-		dev_priv->display.fdi_link_train = ivb_manual_fdi_link_train;
-	}
+	intel_fdi_init_hook(dev_priv);
 
 	if (INTEL_GEN(dev_priv) >= 9) {
 		dev_priv->display.commit_modeset_enables = skl_commit_modeset_enables;
diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
index 8e145f9a32e5..f951a09d6b12 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -1852,4 +1852,13 @@  static inline u32 i9xx_dpll_compute_fp(struct dpll *dpll)
 	return dpll->n << 16 | dpll->m1 << 8 | dpll->m2;
 }
 
+static inline u32 intel_fdi_link_freq(struct drm_i915_private *dev_priv,
+				      const struct intel_crtc_state *pipe_config)
+{
+	if (HAS_DDI(dev_priv))
+		return pipe_config->port_clock; /* SPLL */
+	else
+		return dev_priv->fdi_pll_freq;
+}
+
 #endif /*  __INTEL_DISPLAY_TYPES_H__ */
diff --git a/drivers/gpu/drm/i915/display/intel_fdi.c b/drivers/gpu/drm/i915/display/intel_fdi.c
new file mode 100644
index 000000000000..b2eb96ae10a2
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_fdi.c
@@ -0,0 +1,683 @@ 
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2020 Intel Corporation
+ */
+#include "intel_atomic.h"
+#include "intel_display_types.h"
+#include "intel_fdi.h"
+
+/* units of 100MHz */
+static int pipe_required_fdi_lanes(struct intel_crtc_state *crtc_state)
+{
+	if (crtc_state->hw.enable && crtc_state->has_pch_encoder)
+		return crtc_state->fdi_lanes;
+
+	return 0;
+}
+
+static int ilk_check_fdi_lanes(struct drm_device *dev, enum pipe pipe,
+			       struct intel_crtc_state *pipe_config)
+{
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct drm_atomic_state *state = pipe_config->uapi.state;
+	struct intel_crtc *other_crtc;
+	struct intel_crtc_state *other_crtc_state;
+
+	drm_dbg_kms(&dev_priv->drm,
+		    "checking fdi config on pipe %c, lanes %i\n",
+		    pipe_name(pipe), pipe_config->fdi_lanes);
+	if (pipe_config->fdi_lanes > 4) {
+		drm_dbg_kms(&dev_priv->drm,
+			    "invalid fdi lane config on pipe %c: %i lanes\n",
+			    pipe_name(pipe), pipe_config->fdi_lanes);
+		return -EINVAL;
+	}
+
+	if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) {
+		if (pipe_config->fdi_lanes > 2) {
+			drm_dbg_kms(&dev_priv->drm,
+				    "only 2 lanes on haswell, required: %i lanes\n",
+				    pipe_config->fdi_lanes);
+			return -EINVAL;
+		} else {
+			return 0;
+		}
+	}
+
+	if (INTEL_NUM_PIPES(dev_priv) == 2)
+		return 0;
+
+	/* Ivybridge 3 pipe is really complicated */
+	switch (pipe) {
+	case PIPE_A:
+		return 0;
+	case PIPE_B:
+		if (pipe_config->fdi_lanes <= 2)
+			return 0;
+
+		other_crtc = intel_get_crtc_for_pipe(dev_priv, PIPE_C);
+		other_crtc_state =
+			intel_atomic_get_crtc_state(state, other_crtc);
+		if (IS_ERR(other_crtc_state))
+			return PTR_ERR(other_crtc_state);
+
+		if (pipe_required_fdi_lanes(other_crtc_state) > 0) {
+			drm_dbg_kms(&dev_priv->drm,
+				    "invalid shared fdi lane config on pipe %c: %i lanes\n",
+				    pipe_name(pipe), pipe_config->fdi_lanes);
+			return -EINVAL;
+		}
+		return 0;
+	case PIPE_C:
+		if (pipe_config->fdi_lanes > 2) {
+			drm_dbg_kms(&dev_priv->drm,
+				    "only 2 lanes on pipe %c: required %i lanes\n",
+				    pipe_name(pipe), pipe_config->fdi_lanes);
+			return -EINVAL;
+		}
+
+		other_crtc = intel_get_crtc_for_pipe(dev_priv, PIPE_B);
+		other_crtc_state =
+			intel_atomic_get_crtc_state(state, other_crtc);
+		if (IS_ERR(other_crtc_state))
+			return PTR_ERR(other_crtc_state);
+
+		if (pipe_required_fdi_lanes(other_crtc_state) > 2) {
+			drm_dbg_kms(&dev_priv->drm,
+				    "fdi link B uses too many lanes to enable link C\n");
+			return -EINVAL;
+		}
+		return 0;
+	default:
+		BUG();
+	}
+}
+
+int ilk_fdi_compute_config(struct intel_crtc *intel_crtc,
+				  struct intel_crtc_state *pipe_config)
+{
+	struct drm_device *dev = intel_crtc->base.dev;
+	struct drm_i915_private *i915 = to_i915(dev);
+	const struct drm_display_mode *adjusted_mode = &pipe_config->hw.adjusted_mode;
+	int lane, link_bw, fdi_dotclock, ret;
+	bool needs_recompute = false;
+
+retry:
+	/* FDI is a binary signal running at ~2.7GHz, encoding
+	 * each output octet as 10 bits. The actual frequency
+	 * is stored as a divider into a 100MHz clock, and the
+	 * mode pixel clock is stored in units of 1KHz.
+	 * Hence the bw of each lane in terms of the mode signal
+	 * is:
+	 */
+	link_bw = intel_fdi_link_freq(i915, pipe_config);
+
+	fdi_dotclock = adjusted_mode->crtc_clock;
+
+	lane = ilk_get_lanes_required(fdi_dotclock, link_bw,
+				      pipe_config->pipe_bpp);
+
+	pipe_config->fdi_lanes = lane;
+
+	intel_link_compute_m_n(pipe_config->pipe_bpp, lane, fdi_dotclock,
+			       link_bw, &pipe_config->fdi_m_n, false, false);
+
+	ret = ilk_check_fdi_lanes(dev, intel_crtc->pipe, pipe_config);
+	if (ret == -EDEADLK)
+		return ret;
+
+	if (ret == -EINVAL && pipe_config->pipe_bpp > 6*3) {
+		pipe_config->pipe_bpp -= 2*3;
+		drm_dbg_kms(&i915->drm,
+			    "fdi link bw constraint, reducing pipe bpp to %i\n",
+			    pipe_config->pipe_bpp);
+		needs_recompute = true;
+		pipe_config->bw_constrained = true;
+
+		goto retry;
+	}
+
+	if (needs_recompute)
+		return I915_DISPLAY_CONFIG_RETRY;
+
+	return ret;
+}
+
+void intel_fdi_normal_train(struct intel_crtc *crtc)
+{
+	struct drm_device *dev = crtc->base.dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	enum pipe pipe = crtc->pipe;
+	i915_reg_t reg;
+	u32 temp;
+
+	/* enable normal train */
+	reg = FDI_TX_CTL(pipe);
+	temp = intel_de_read(dev_priv, reg);
+	if (IS_IVYBRIDGE(dev_priv)) {
+		temp &= ~FDI_LINK_TRAIN_NONE_IVB;
+		temp |= FDI_LINK_TRAIN_NONE_IVB | FDI_TX_ENHANCE_FRAME_ENABLE;
+	} else {
+		temp &= ~FDI_LINK_TRAIN_NONE;
+		temp |= FDI_LINK_TRAIN_NONE | FDI_TX_ENHANCE_FRAME_ENABLE;
+	}
+	intel_de_write(dev_priv, reg, temp);
+
+	reg = FDI_RX_CTL(pipe);
+	temp = intel_de_read(dev_priv, reg);
+	if (HAS_PCH_CPT(dev_priv)) {
+		temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
+		temp |= FDI_LINK_TRAIN_NORMAL_CPT;
+	} else {
+		temp &= ~FDI_LINK_TRAIN_NONE;
+		temp |= FDI_LINK_TRAIN_NONE;
+	}
+	intel_de_write(dev_priv, reg, temp | FDI_RX_ENHANCE_FRAME_ENABLE);
+
+	/* wait one idle pattern time */
+	intel_de_posting_read(dev_priv, reg);
+	udelay(1000);
+
+	/* IVB wants error correction enabled */
+	if (IS_IVYBRIDGE(dev_priv))
+		intel_de_write(dev_priv, reg,
+			       intel_de_read(dev_priv, reg) | FDI_FS_ERRC_ENABLE | FDI_FE_ERRC_ENABLE);
+}
+
+/* The FDI link training functions for ILK/Ibexpeak. */
+static void ilk_fdi_link_train(struct intel_crtc *crtc,
+			       const struct intel_crtc_state *crtc_state)
+{
+	struct drm_device *dev = crtc->base.dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	enum pipe pipe = crtc->pipe;
+	i915_reg_t reg;
+	u32 temp, tries;
+
+	/* FDI needs bits from pipe first */
+	assert_pipe_enabled(dev_priv, crtc_state->cpu_transcoder);
+
+	/* Train 1: umask FDI RX Interrupt symbol_lock and bit_lock bit
+	   for train result */
+	reg = FDI_RX_IMR(pipe);
+	temp = intel_de_read(dev_priv, reg);
+	temp &= ~FDI_RX_SYMBOL_LOCK;
+	temp &= ~FDI_RX_BIT_LOCK;
+	intel_de_write(dev_priv, reg, temp);
+	intel_de_read(dev_priv, reg);
+	udelay(150);
+
+	/* enable CPU FDI TX and PCH FDI RX */
+	reg = FDI_TX_CTL(pipe);
+	temp = intel_de_read(dev_priv, reg);
+	temp &= ~FDI_DP_PORT_WIDTH_MASK;
+	temp |= FDI_DP_PORT_WIDTH(crtc_state->fdi_lanes);
+	temp &= ~FDI_LINK_TRAIN_NONE;
+	temp |= FDI_LINK_TRAIN_PATTERN_1;
+	intel_de_write(dev_priv, reg, temp | FDI_TX_ENABLE);
+
+	reg = FDI_RX_CTL(pipe);
+	temp = intel_de_read(dev_priv, reg);
+	temp &= ~FDI_LINK_TRAIN_NONE;
+	temp |= FDI_LINK_TRAIN_PATTERN_1;
+	intel_de_write(dev_priv, reg, temp | FDI_RX_ENABLE);
+
+	intel_de_posting_read(dev_priv, reg);
+	udelay(150);
+
+	/* Ironlake workaround, enable clock pointer after FDI enable*/
+	intel_de_write(dev_priv, FDI_RX_CHICKEN(pipe),
+		       FDI_RX_PHASE_SYNC_POINTER_OVR);
+	intel_de_write(dev_priv, FDI_RX_CHICKEN(pipe),
+		       FDI_RX_PHASE_SYNC_POINTER_OVR | FDI_RX_PHASE_SYNC_POINTER_EN);
+
+	reg = FDI_RX_IIR(pipe);
+	for (tries = 0; tries < 5; tries++) {
+		temp = intel_de_read(dev_priv, reg);
+		drm_dbg_kms(&dev_priv->drm, "FDI_RX_IIR 0x%x\n", temp);
+
+		if ((temp & FDI_RX_BIT_LOCK)) {
+			drm_dbg_kms(&dev_priv->drm, "FDI train 1 done.\n");
+			intel_de_write(dev_priv, reg, temp | FDI_RX_BIT_LOCK);
+			break;
+		}
+	}
+	if (tries == 5)
+		drm_err(&dev_priv->drm, "FDI train 1 fail!\n");
+
+	/* Train 2 */
+	reg = FDI_TX_CTL(pipe);
+	temp = intel_de_read(dev_priv, reg);
+	temp &= ~FDI_LINK_TRAIN_NONE;
+	temp |= FDI_LINK_TRAIN_PATTERN_2;
+	intel_de_write(dev_priv, reg, temp);
+
+	reg = FDI_RX_CTL(pipe);
+	temp = intel_de_read(dev_priv, reg);
+	temp &= ~FDI_LINK_TRAIN_NONE;
+	temp |= FDI_LINK_TRAIN_PATTERN_2;
+	intel_de_write(dev_priv, reg, temp);
+
+	intel_de_posting_read(dev_priv, reg);
+	udelay(150);
+
+	reg = FDI_RX_IIR(pipe);
+	for (tries = 0; tries < 5; tries++) {
+		temp = intel_de_read(dev_priv, reg);
+		drm_dbg_kms(&dev_priv->drm, "FDI_RX_IIR 0x%x\n", temp);
+
+		if (temp & FDI_RX_SYMBOL_LOCK) {
+			intel_de_write(dev_priv, reg,
+				       temp | FDI_RX_SYMBOL_LOCK);
+			drm_dbg_kms(&dev_priv->drm, "FDI train 2 done.\n");
+			break;
+		}
+	}
+	if (tries == 5)
+		drm_err(&dev_priv->drm, "FDI train 2 fail!\n");
+
+	drm_dbg_kms(&dev_priv->drm, "FDI train done\n");
+
+}
+
+static const int snb_b_fdi_train_param[] = {
+	FDI_LINK_TRAIN_400MV_0DB_SNB_B,
+	FDI_LINK_TRAIN_400MV_6DB_SNB_B,
+	FDI_LINK_TRAIN_600MV_3_5DB_SNB_B,
+	FDI_LINK_TRAIN_800MV_0DB_SNB_B,
+};
+
+/* The FDI link training functions for SNB/Cougarpoint. */
+static void gen6_fdi_link_train(struct intel_crtc *crtc,
+				const struct intel_crtc_state *crtc_state)
+{
+	struct drm_device *dev = crtc->base.dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	enum pipe pipe = crtc->pipe;
+	i915_reg_t reg;
+	u32 temp, i, retry;
+
+	/* Train 1: umask FDI RX Interrupt symbol_lock and bit_lock bit
+	   for train result */
+	reg = FDI_RX_IMR(pipe);
+	temp = intel_de_read(dev_priv, reg);
+	temp &= ~FDI_RX_SYMBOL_LOCK;
+	temp &= ~FDI_RX_BIT_LOCK;
+	intel_de_write(dev_priv, reg, temp);
+
+	intel_de_posting_read(dev_priv, reg);
+	udelay(150);
+
+	/* enable CPU FDI TX and PCH FDI RX */
+	reg = FDI_TX_CTL(pipe);
+	temp = intel_de_read(dev_priv, reg);
+	temp &= ~FDI_DP_PORT_WIDTH_MASK;
+	temp |= FDI_DP_PORT_WIDTH(crtc_state->fdi_lanes);
+	temp &= ~FDI_LINK_TRAIN_NONE;
+	temp |= FDI_LINK_TRAIN_PATTERN_1;
+	temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
+	/* SNB-B */
+	temp |= FDI_LINK_TRAIN_400MV_0DB_SNB_B;
+	intel_de_write(dev_priv, reg, temp | FDI_TX_ENABLE);
+
+	intel_de_write(dev_priv, FDI_RX_MISC(pipe),
+		       FDI_RX_TP1_TO_TP2_48 | FDI_RX_FDI_DELAY_90);
+
+	reg = FDI_RX_CTL(pipe);
+	temp = intel_de_read(dev_priv, reg);
+	if (HAS_PCH_CPT(dev_priv)) {
+		temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
+		temp |= FDI_LINK_TRAIN_PATTERN_1_CPT;
+	} else {
+		temp &= ~FDI_LINK_TRAIN_NONE;
+		temp |= FDI_LINK_TRAIN_PATTERN_1;
+	}
+	intel_de_write(dev_priv, reg, temp | FDI_RX_ENABLE);
+
+	intel_de_posting_read(dev_priv, reg);
+	udelay(150);
+
+	for (i = 0; i < 4; i++) {
+		reg = FDI_TX_CTL(pipe);
+		temp = intel_de_read(dev_priv, reg);
+		temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
+		temp |= snb_b_fdi_train_param[i];
+		intel_de_write(dev_priv, reg, temp);
+
+		intel_de_posting_read(dev_priv, reg);
+		udelay(500);
+
+		for (retry = 0; retry < 5; retry++) {
+			reg = FDI_RX_IIR(pipe);
+			temp = intel_de_read(dev_priv, reg);
+			drm_dbg_kms(&dev_priv->drm, "FDI_RX_IIR 0x%x\n", temp);
+			if (temp & FDI_RX_BIT_LOCK) {
+				intel_de_write(dev_priv, reg,
+					       temp | FDI_RX_BIT_LOCK);
+				drm_dbg_kms(&dev_priv->drm,
+					    "FDI train 1 done.\n");
+				break;
+			}
+			udelay(50);
+		}
+		if (retry < 5)
+			break;
+	}
+	if (i == 4)
+		drm_err(&dev_priv->drm, "FDI train 1 fail!\n");
+
+	/* Train 2 */
+	reg = FDI_TX_CTL(pipe);
+	temp = intel_de_read(dev_priv, reg);
+	temp &= ~FDI_LINK_TRAIN_NONE;
+	temp |= FDI_LINK_TRAIN_PATTERN_2;
+	if (IS_GEN(dev_priv, 6)) {
+		temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
+		/* SNB-B */
+		temp |= FDI_LINK_TRAIN_400MV_0DB_SNB_B;
+	}
+	intel_de_write(dev_priv, reg, temp);
+
+	reg = FDI_RX_CTL(pipe);
+	temp = intel_de_read(dev_priv, reg);
+	if (HAS_PCH_CPT(dev_priv)) {
+		temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
+		temp |= FDI_LINK_TRAIN_PATTERN_2_CPT;
+	} else {
+		temp &= ~FDI_LINK_TRAIN_NONE;
+		temp |= FDI_LINK_TRAIN_PATTERN_2;
+	}
+	intel_de_write(dev_priv, reg, temp);
+
+	intel_de_posting_read(dev_priv, reg);
+	udelay(150);
+
+	for (i = 0; i < 4; i++) {
+		reg = FDI_TX_CTL(pipe);
+		temp = intel_de_read(dev_priv, reg);
+		temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
+		temp |= snb_b_fdi_train_param[i];
+		intel_de_write(dev_priv, reg, temp);
+
+		intel_de_posting_read(dev_priv, reg);
+		udelay(500);
+
+		for (retry = 0; retry < 5; retry++) {
+			reg = FDI_RX_IIR(pipe);
+			temp = intel_de_read(dev_priv, reg);
+			drm_dbg_kms(&dev_priv->drm, "FDI_RX_IIR 0x%x\n", temp);
+			if (temp & FDI_RX_SYMBOL_LOCK) {
+				intel_de_write(dev_priv, reg,
+					       temp | FDI_RX_SYMBOL_LOCK);
+				drm_dbg_kms(&dev_priv->drm,
+					    "FDI train 2 done.\n");
+				break;
+			}
+			udelay(50);
+		}
+		if (retry < 5)
+			break;
+	}
+	if (i == 4)
+		drm_err(&dev_priv->drm, "FDI train 2 fail!\n");
+
+	drm_dbg_kms(&dev_priv->drm, "FDI train done.\n");
+}
+
+/* Manual link training for Ivy Bridge A0 parts */
+static void ivb_manual_fdi_link_train(struct intel_crtc *crtc,
+				      const struct intel_crtc_state *crtc_state)
+{
+	struct drm_device *dev = crtc->base.dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	enum pipe pipe = crtc->pipe;
+	i915_reg_t reg;
+	u32 temp, i, j;
+
+	/* Train 1: umask FDI RX Interrupt symbol_lock and bit_lock bit
+	   for train result */
+	reg = FDI_RX_IMR(pipe);
+	temp = intel_de_read(dev_priv, reg);
+	temp &= ~FDI_RX_SYMBOL_LOCK;
+	temp &= ~FDI_RX_BIT_LOCK;
+	intel_de_write(dev_priv, reg, temp);
+
+	intel_de_posting_read(dev_priv, reg);
+	udelay(150);
+
+	drm_dbg_kms(&dev_priv->drm, "FDI_RX_IIR before link train 0x%x\n",
+		    intel_de_read(dev_priv, FDI_RX_IIR(pipe)));
+
+	/* Try each vswing and preemphasis setting twice before moving on */
+	for (j = 0; j < ARRAY_SIZE(snb_b_fdi_train_param) * 2; j++) {
+		/* disable first in case we need to retry */
+		reg = FDI_TX_CTL(pipe);
+		temp = intel_de_read(dev_priv, reg);
+		temp &= ~(FDI_LINK_TRAIN_AUTO | FDI_LINK_TRAIN_NONE_IVB);
+		temp &= ~FDI_TX_ENABLE;
+		intel_de_write(dev_priv, reg, temp);
+
+		reg = FDI_RX_CTL(pipe);
+		temp = intel_de_read(dev_priv, reg);
+		temp &= ~FDI_LINK_TRAIN_AUTO;
+		temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
+		temp &= ~FDI_RX_ENABLE;
+		intel_de_write(dev_priv, reg, temp);
+
+		/* enable CPU FDI TX and PCH FDI RX */
+		reg = FDI_TX_CTL(pipe);
+		temp = intel_de_read(dev_priv, reg);
+		temp &= ~FDI_DP_PORT_WIDTH_MASK;
+		temp |= FDI_DP_PORT_WIDTH(crtc_state->fdi_lanes);
+		temp |= FDI_LINK_TRAIN_PATTERN_1_IVB;
+		temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
+		temp |= snb_b_fdi_train_param[j/2];
+		temp |= FDI_COMPOSITE_SYNC;
+		intel_de_write(dev_priv, reg, temp | FDI_TX_ENABLE);
+
+		intel_de_write(dev_priv, FDI_RX_MISC(pipe),
+			       FDI_RX_TP1_TO_TP2_48 | FDI_RX_FDI_DELAY_90);
+
+		reg = FDI_RX_CTL(pipe);
+		temp = intel_de_read(dev_priv, reg);
+		temp |= FDI_LINK_TRAIN_PATTERN_1_CPT;
+		temp |= FDI_COMPOSITE_SYNC;
+		intel_de_write(dev_priv, reg, temp | FDI_RX_ENABLE);
+
+		intel_de_posting_read(dev_priv, reg);
+		udelay(1); /* should be 0.5us */
+
+		for (i = 0; i < 4; i++) {
+			reg = FDI_RX_IIR(pipe);
+			temp = intel_de_read(dev_priv, reg);
+			drm_dbg_kms(&dev_priv->drm, "FDI_RX_IIR 0x%x\n", temp);
+
+			if (temp & FDI_RX_BIT_LOCK ||
+			    (intel_de_read(dev_priv, reg) & FDI_RX_BIT_LOCK)) {
+				intel_de_write(dev_priv, reg,
+					       temp | FDI_RX_BIT_LOCK);
+				drm_dbg_kms(&dev_priv->drm,
+					    "FDI train 1 done, level %i.\n",
+					    i);
+				break;
+			}
+			udelay(1); /* should be 0.5us */
+		}
+		if (i == 4) {
+			drm_dbg_kms(&dev_priv->drm,
+				    "FDI train 1 fail on vswing %d\n", j / 2);
+			continue;
+		}
+
+		/* Train 2 */
+		reg = FDI_TX_CTL(pipe);
+		temp = intel_de_read(dev_priv, reg);
+		temp &= ~FDI_LINK_TRAIN_NONE_IVB;
+		temp |= FDI_LINK_TRAIN_PATTERN_2_IVB;
+		intel_de_write(dev_priv, reg, temp);
+
+		reg = FDI_RX_CTL(pipe);
+		temp = intel_de_read(dev_priv, reg);
+		temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
+		temp |= FDI_LINK_TRAIN_PATTERN_2_CPT;
+		intel_de_write(dev_priv, reg, temp);
+
+		intel_de_posting_read(dev_priv, reg);
+		udelay(2); /* should be 1.5us */
+
+		for (i = 0; i < 4; i++) {
+			reg = FDI_RX_IIR(pipe);
+			temp = intel_de_read(dev_priv, reg);
+			drm_dbg_kms(&dev_priv->drm, "FDI_RX_IIR 0x%x\n", temp);
+
+			if (temp & FDI_RX_SYMBOL_LOCK ||
+			    (intel_de_read(dev_priv, reg) & FDI_RX_SYMBOL_LOCK)) {
+				intel_de_write(dev_priv, reg,
+					       temp | FDI_RX_SYMBOL_LOCK);
+				drm_dbg_kms(&dev_priv->drm,
+					    "FDI train 2 done, level %i.\n",
+					    i);
+				goto train_done;
+			}
+			udelay(2); /* should be 1.5us */
+		}
+		if (i == 4)
+			drm_dbg_kms(&dev_priv->drm,
+				    "FDI train 2 fail on vswing %d\n", j / 2);
+	}
+
+train_done:
+	drm_dbg_kms(&dev_priv->drm, "FDI train done.\n");
+}
+
+void ilk_fdi_pll_enable(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *intel_crtc = to_intel_crtc(crtc_state->uapi.crtc);
+	struct drm_i915_private *dev_priv = to_i915(intel_crtc->base.dev);
+	enum pipe pipe = intel_crtc->pipe;
+	i915_reg_t reg;
+	u32 temp;
+
+	/* enable PCH FDI RX PLL, wait warmup plus DMI latency */
+	reg = FDI_RX_CTL(pipe);
+	temp = intel_de_read(dev_priv, reg);
+	temp &= ~(FDI_DP_PORT_WIDTH_MASK | (0x7 << 16));
+	temp |= FDI_DP_PORT_WIDTH(crtc_state->fdi_lanes);
+	temp |= (intel_de_read(dev_priv, PIPECONF(pipe)) & PIPECONF_BPC_MASK) << 11;
+	intel_de_write(dev_priv, reg, temp | FDI_RX_PLL_ENABLE);
+
+	intel_de_posting_read(dev_priv, reg);
+	udelay(200);
+
+	/* Switch from Rawclk to PCDclk */
+	temp = intel_de_read(dev_priv, reg);
+	intel_de_write(dev_priv, reg, temp | FDI_PCDCLK);
+
+	intel_de_posting_read(dev_priv, reg);
+	udelay(200);
+
+	/* Enable CPU FDI TX PLL, always on for Ironlake */
+	reg = FDI_TX_CTL(pipe);
+	temp = intel_de_read(dev_priv, reg);
+	if ((temp & FDI_TX_PLL_ENABLE) == 0) {
+		intel_de_write(dev_priv, reg, temp | FDI_TX_PLL_ENABLE);
+
+		intel_de_posting_read(dev_priv, reg);
+		udelay(100);
+	}
+}
+
+void ilk_fdi_pll_disable(struct intel_crtc *intel_crtc)
+{
+	struct drm_device *dev = intel_crtc->base.dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	enum pipe pipe = intel_crtc->pipe;
+	i915_reg_t reg;
+	u32 temp;
+
+	/* Switch from PCDclk to Rawclk */
+	reg = FDI_RX_CTL(pipe);
+	temp = intel_de_read(dev_priv, reg);
+	intel_de_write(dev_priv, reg, temp & ~FDI_PCDCLK);
+
+	/* Disable CPU FDI TX PLL */
+	reg = FDI_TX_CTL(pipe);
+	temp = intel_de_read(dev_priv, reg);
+	intel_de_write(dev_priv, reg, temp & ~FDI_TX_PLL_ENABLE);
+
+	intel_de_posting_read(dev_priv, reg);
+	udelay(100);
+
+	reg = FDI_RX_CTL(pipe);
+	temp = intel_de_read(dev_priv, reg);
+	intel_de_write(dev_priv, reg, temp & ~FDI_RX_PLL_ENABLE);
+
+	/* Wait for the clocks to turn off. */
+	intel_de_posting_read(dev_priv, reg);
+	udelay(100);
+}
+
+void ilk_fdi_disable(struct intel_crtc *crtc)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	enum pipe pipe = crtc->pipe;
+	i915_reg_t reg;
+	u32 temp;
+
+	/* disable CPU FDI tx and PCH FDI rx */
+	reg = FDI_TX_CTL(pipe);
+	temp = intel_de_read(dev_priv, reg);
+	intel_de_write(dev_priv, reg, temp & ~FDI_TX_ENABLE);
+	intel_de_posting_read(dev_priv, reg);
+
+	reg = FDI_RX_CTL(pipe);
+	temp = intel_de_read(dev_priv, reg);
+	temp &= ~(0x7 << 16);
+	temp |= (intel_de_read(dev_priv, PIPECONF(pipe)) & PIPECONF_BPC_MASK) << 11;
+	intel_de_write(dev_priv, reg, temp & ~FDI_RX_ENABLE);
+
+	intel_de_posting_read(dev_priv, reg);
+	udelay(100);
+
+	/* Ironlake workaround, disable clock pointer after downing FDI */
+	if (HAS_PCH_IBX(dev_priv))
+		intel_de_write(dev_priv, FDI_RX_CHICKEN(pipe),
+			       FDI_RX_PHASE_SYNC_POINTER_OVR);
+
+	/* still set train pattern 1 */
+	reg = FDI_TX_CTL(pipe);
+	temp = intel_de_read(dev_priv, reg);
+	temp &= ~FDI_LINK_TRAIN_NONE;
+	temp |= FDI_LINK_TRAIN_PATTERN_1;
+	intel_de_write(dev_priv, reg, temp);
+
+	reg = FDI_RX_CTL(pipe);
+	temp = intel_de_read(dev_priv, reg);
+	if (HAS_PCH_CPT(dev_priv)) {
+		temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
+		temp |= FDI_LINK_TRAIN_PATTERN_1_CPT;
+	} else {
+		temp &= ~FDI_LINK_TRAIN_NONE;
+		temp |= FDI_LINK_TRAIN_PATTERN_1;
+	}
+	/* BPC in FDI rx is consistent with that in PIPECONF */
+	temp &= ~(0x07 << 16);
+	temp |= (intel_de_read(dev_priv, PIPECONF(pipe)) & PIPECONF_BPC_MASK) << 11;
+	intel_de_write(dev_priv, reg, temp);
+
+	intel_de_posting_read(dev_priv, reg);
+	udelay(100);
+}
+
+void
+intel_fdi_init_hook(struct drm_i915_private *dev_priv)
+{
+	if (IS_GEN(dev_priv, 5)) {
+		dev_priv->display.fdi_link_train = ilk_fdi_link_train;
+	} else if (IS_GEN(dev_priv, 6)) {
+		dev_priv->display.fdi_link_train = gen6_fdi_link_train;
+	} else if (IS_IVYBRIDGE(dev_priv)) {
+		/* FIXME: detect B0+ stepping and use auto training */
+		dev_priv->display.fdi_link_train = ivb_manual_fdi_link_train;
+	}
+}
diff --git a/drivers/gpu/drm/i915/display/intel_fdi.h b/drivers/gpu/drm/i915/display/intel_fdi.h
new file mode 100644
index 000000000000..a9cd21663eb8
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_fdi.h
@@ -0,0 +1,22 @@ 
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2020 Intel Corporation
+ */
+
+#ifndef _INTEL_FDI_H_
+#define _INTEL_FDI_H_
+
+struct drm_i915_private;
+struct intel_crtc;
+struct intel_crtc_state;
+
+#define I915_DISPLAY_CONFIG_RETRY 1
+int ilk_fdi_compute_config(struct intel_crtc *intel_crtc,
+			   struct intel_crtc_state *pipe_config);
+void intel_fdi_normal_train(struct intel_crtc *crtc);
+void ilk_fdi_disable(struct intel_crtc *crtc);
+void ilk_fdi_pll_disable(struct intel_crtc *intel_crtc);
+void ilk_fdi_pll_enable(const struct intel_crtc_state *crtc_state);
+void intel_fdi_init_hook(struct drm_i915_private *dev_priv);
+
+#endif