Merge branch 'drm/next/du' of git://linuxtv.org/pinchartl/fbdev into drm-next

* 'drm/next/du' of git://linuxtv.org/pinchartl/fbdev:
  drm: rcar-du: Implement support for interlaced modes
  drm: rcar-du: Clamp DPMS states to on and off
  drm: rcar-du: Enable hotplug detection on HDMI connector
  drm: rcar-du: Output HSYNC instead of CSYNC
  drm: rcar-du: Add support for external pixel clock
  drm: rcar-du: Refactor DEFR8 feature
  drm: rcar-du: Remove LVDS and HDMI encoders chaining restriction
  drm: rcar-du: Configure pitch for chroma plane of multiplanar formats
  drm: rcar-du: Don't fail probe in case of partial encoder init error
  drm: adv7511: Remove interlaced mode check

13 files changed, 176 insertions, 47 deletions

diff --git a/drivers/gpu/drm/i2c/adv7511.c b/drivers/gpu/drm/i2c/adv7511.c
index faf1c0c5ab2e..fa140e04d5fa 100644
--- a/drivers/gpu/drm/i2c/adv7511.c
+++ b/drivers/gpu/drm/i2c/adv7511.c
@@ -644,9 +644,6 @@ static int adv7511_encoder_mode_valid(struct drm_encoder *encoder,
 	if (mode->clock > 165000)
 		return MODE_CLOCK_HIGH;
 
-	if (mode->flags & DRM_MODE_FLAG_INTERLACE)
-		return MODE_NO_INTERLACE;
-
 	return MODE_OK;
 }
 
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
index 23cc910951f4..25c7a998fc2c 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
@@ -74,39 +74,77 @@ static int rcar_du_crtc_get(struct rcar_du_crtc *rcrtc)
 	if (ret < 0)
 		return ret;
 
+	ret = clk_prepare_enable(rcrtc->extclock);
+	if (ret < 0)
+		goto error_clock;
+
 	ret = rcar_du_group_get(rcrtc->group);
 	if (ret < 0)
-		clk_disable_unprepare(rcrtc->clock);
+		goto error_group;
+
+	return 0;
 
+error_group:
+	clk_disable_unprepare(rcrtc->extclock);
+error_clock:
+	clk_disable_unprepare(rcrtc->clock);
 	return ret;
 }
 
 static void rcar_du_crtc_put(struct rcar_du_crtc *rcrtc)
 {
 	rcar_du_group_put(rcrtc->group);
+
+	clk_disable_unprepare(rcrtc->extclock);
 	clk_disable_unprepare(rcrtc->clock);
 }
 
 static void rcar_du_crtc_set_display_timing(struct rcar_du_crtc *rcrtc)
 {
 	const struct drm_display_mode *mode = &rcrtc->crtc.mode;
+	unsigned long mode_clock = mode->clock * 1000;
 	unsigned long clk;
 	u32 value;
+	u32 escr;
 	u32 div;
 
-	/* Dot clock */
+	/* Compute the clock divisor and select the internal or external dot
+	 * clock based on the requested frequency.
+	 */
 	clk = clk_get_rate(rcrtc->clock);
-	div = DIV_ROUND_CLOSEST(clk, mode->clock * 1000);
+	div = DIV_ROUND_CLOSEST(clk, mode_clock);
 	div = clamp(div, 1U, 64U) - 1;
+	escr = div | ESCR_DCLKSEL_CLKS;
+
+	if (rcrtc->extclock) {
+		unsigned long extclk;
+		unsigned long extrate;
+		unsigned long rate;
+		u32 extdiv;
+
+		extclk = clk_get_rate(rcrtc->extclock);
+		extdiv = DIV_ROUND_CLOSEST(extclk, mode_clock);
+		extdiv = clamp(extdiv, 1U, 64U) - 1;
+
+		rate = clk / (div + 1);
+		extrate = extclk / (extdiv + 1);
+
+		if (abs((long)extrate - (long)mode_clock) <
+		    abs((long)rate - (long)mode_clock)) {
+			dev_dbg(rcrtc->group->dev->dev,
+				"crtc%u: using external clock\n", rcrtc->index);
+			escr = extdiv | ESCR_DCLKSEL_DCLKIN;
+		}
+	}
 
 	rcar_du_group_write(rcrtc->group, rcrtc->index % 2 ? ESCR2 : ESCR,
-			    ESCR_DCLKSEL_CLKS | div);
+			    escr);
 	rcar_du_group_write(rcrtc->group, rcrtc->index % 2 ? OTAR2 : OTAR, 0);
 
 	/* Signal polarities */
 	value = ((mode->flags & DRM_MODE_FLAG_PVSYNC) ? 0 : DSMR_VSL)
 	      | ((mode->flags & DRM_MODE_FLAG_PHSYNC) ? 0 : DSMR_HSL)
-	      | DSMR_DIPM_DE;
+	      | DSMR_DIPM_DE | DSMR_CSPM;
 	rcar_du_crtc_write(rcrtc, DSMR, value);
 
 	/* Display timings */
@@ -117,12 +155,15 @@ static void rcar_du_crtc_set_display_timing(struct rcar_du_crtc *rcrtc)
 					mode->hsync_start - 1);
 	rcar_du_crtc_write(rcrtc, HCR,  mode->htotal - 1);
 
-	rcar_du_crtc_write(rcrtc, VDSR, mode->vtotal - mode->vsync_end - 2);
-	rcar_du_crtc_write(rcrtc, VDER, mode->vtotal - mode->vsync_end +
-					mode->vdisplay - 2);
-	rcar_du_crtc_write(rcrtc, VSPR, mode->vtotal - mode->vsync_end +
-					mode->vsync_start - 1);
-	rcar_du_crtc_write(rcrtc, VCR,  mode->vtotal - 1);
+	rcar_du_crtc_write(rcrtc, VDSR, mode->crtc_vtotal -
+					mode->crtc_vsync_end - 2);
+	rcar_du_crtc_write(rcrtc, VDER, mode->crtc_vtotal -
+					mode->crtc_vsync_end +
+					mode->crtc_vdisplay - 2);
+	rcar_du_crtc_write(rcrtc, VSPR, mode->crtc_vtotal -
+					mode->crtc_vsync_end +
+					mode->crtc_vsync_start - 1);
+	rcar_du_crtc_write(rcrtc, VCR,  mode->crtc_vtotal - 1);
 
 	rcar_du_crtc_write(rcrtc, DESR,  mode->htotal - mode->hsync_start);
 	rcar_du_crtc_write(rcrtc, DEWR,  mode->hdisplay);
@@ -139,9 +180,10 @@ void rcar_du_crtc_route_output(struct drm_crtc *crtc,
 	 */
 	rcrtc->outputs |= BIT(output);
 
-	/* Store RGB routing to DPAD0 for R8A7790. */
-	if (rcar_du_has(rcdu, RCAR_DU_FEATURE_DEFR8) &&
-	    output == RCAR_DU_OUTPUT_DPAD0)
+	/* Store RGB routing to DPAD0, the hardware will be configured when
+	 * starting the CRTC.
+	 */
+	if (output == RCAR_DU_OUTPUT_DPAD0)
 		rcdu->dpad0_source = rcrtc->index;
 }
 
@@ -217,6 +259,7 @@ void rcar_du_crtc_update_planes(struct drm_crtc *crtc)
 static void rcar_du_crtc_start(struct rcar_du_crtc *rcrtc)
 {
 	struct drm_crtc *crtc = &rcrtc->crtc;
+	bool interlaced;
 	unsigned int i;
 
 	if (rcrtc->started)
@@ -252,7 +295,10 @@ static void rcar_du_crtc_start(struct rcar_du_crtc *rcrtc)
 	 * sync mode (with the HSYNC and VSYNC signals configured as outputs and
 	 * actively driven).
 	 */
-	rcar_du_crtc_clr_set(rcrtc, DSYSR, DSYSR_TVM_MASK, DSYSR_TVM_MASTER);
+	interlaced = rcrtc->crtc.mode.flags & DRM_MODE_FLAG_INTERLACE;
+	rcar_du_crtc_clr_set(rcrtc, DSYSR, DSYSR_TVM_MASK | DSYSR_SCM_MASK,
+			     (interlaced ? DSYSR_SCM_INT_VIDEO : 0) |
+			     DSYSR_TVM_MASTER);
 
 	rcar_du_group_start_stop(rcrtc->group, true);
 
@@ -308,6 +354,9 @@ static void rcar_du_crtc_dpms(struct drm_crtc *crtc, int mode)
 {
 	struct rcar_du_crtc *rcrtc = to_rcar_crtc(crtc);
 
+	if (mode != DRM_MODE_DPMS_ON)
+		mode = DRM_MODE_DPMS_OFF;
+
 	if (rcrtc->dpms == mode)
 		return;
 
@@ -486,7 +535,7 @@ static irqreturn_t rcar_du_crtc_irq(int irq, void *arg)
 	status = rcar_du_crtc_read(rcrtc, DSSR);
 	rcar_du_crtc_write(rcrtc, DSRCR, status & DSRCR_MASK);
 
-	if (status & DSSR_VBK) {
+	if (status & DSSR_FRM) {
 		drm_handle_vblank(rcrtc->crtc.dev, rcrtc->index);
 		rcar_du_crtc_finish_page_flip(rcrtc);
 		ret = IRQ_HANDLED;
@@ -542,12 +591,13 @@ int rcar_du_crtc_create(struct rcar_du_group *rgrp, unsigned int index)
 	struct rcar_du_crtc *rcrtc = &rcdu->crtcs[index];
 	struct drm_crtc *crtc = &rcrtc->crtc;
 	unsigned int irqflags;
-	char clk_name[5];
+	struct clk *clk;
+	char clk_name[9];
 	char *name;
 	int irq;
 	int ret;
 
-	/* Get the CRTC clock. */
+	/* Get the CRTC clock and the optional external clock. */
 	if (rcar_du_has(rcdu, RCAR_DU_FEATURE_CRTC_IRQ_CLOCK)) {
 		sprintf(clk_name, "du.%u", index);
 		name = clk_name;
@@ -561,6 +611,15 @@ int rcar_du_crtc_create(struct rcar_du_group *rgrp, unsigned int index)
 		return PTR_ERR(rcrtc->clock);
 	}
 
+	sprintf(clk_name, "dclkin.%u", index);
+	clk = devm_clk_get(rcdu->dev, clk_name);
+	if (!IS_ERR(clk)) {
+		rcrtc->extclock = clk;
+	} else if (PTR_ERR(rcrtc->clock) == -EPROBE_DEFER) {
+		dev_info(rcdu->dev, "can't get external clock %u\n", index);
+		return -EPROBE_DEFER;
+	}
+
 	rcrtc->group = rgrp;
 	rcrtc->mmio_offset = mmio_offsets[index];
 	rcrtc->index = index;
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_crtc.h b/drivers/gpu/drm/rcar-du/rcar_du_crtc.h
index 984e6083699f..d2f89f7d2e5e 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_crtc.h
+++ b/drivers/gpu/drm/rcar-du/rcar_du_crtc.h
@@ -26,6 +26,7 @@ struct rcar_du_crtc {
 	struct drm_crtc crtc;
 
 	struct clk *clock;
+	struct clk *extclock;
 	unsigned int mmio_offset;
 	unsigned int index;
 	bool started;
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.c b/drivers/gpu/drm/rcar-du/rcar_du_drv.c
index 7bfa09cf18d5..e0d74f821416 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_drv.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.c
@@ -56,7 +56,8 @@ static const struct rcar_du_device_info rcar_du_r8a7779_info = {
 };
 
 static const struct rcar_du_device_info rcar_du_r8a7790_info = {
-	.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK | RCAR_DU_FEATURE_DEFR8,
+	.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
+		  | RCAR_DU_FEATURE_EXT_CTRL_REGS,
 	.quirks = RCAR_DU_QUIRK_ALIGN_128B | RCAR_DU_QUIRK_LVDS_LANES,
 	.num_crtcs = 3,
 	.routes = {
@@ -83,7 +84,8 @@ static const struct rcar_du_device_info rcar_du_r8a7790_info = {
 };
 
 static const struct rcar_du_device_info rcar_du_r8a7791_info = {
-	.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK | RCAR_DU_FEATURE_DEFR8,
+	.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
+		  | RCAR_DU_FEATURE_EXT_CTRL_REGS,
 	.num_crtcs = 2,
 	.routes = {
 		/* R8A7791 has one RGB output, one LVDS output and one
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.h b/drivers/gpu/drm/rcar-du/rcar_du_drv.h
index 0a724669f02d..c5b9ea6a7eaa 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_drv.h
+++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.h
@@ -27,7 +27,7 @@ struct rcar_du_device;
 struct rcar_du_lvdsenc;
 
 #define RCAR_DU_FEATURE_CRTC_IRQ_CLOCK	(1 << 0)	/* Per-CRTC IRQ and clock */
-#define RCAR_DU_FEATURE_DEFR8		(1 << 1)	/* Has DEFR8 register */
+#define RCAR_DU_FEATURE_EXT_CTRL_REGS	(1 << 1)	/* Has extended control registers */
 
 #define RCAR_DU_QUIRK_ALIGN_128B	(1 << 0)	/* Align pitches to 128 bytes */
 #define RCAR_DU_QUIRK_LVDS_LANES	(1 << 1)	/* LVDS lanes 1 and 3 inverted */
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_encoder.c b/drivers/gpu/drm/rcar-du/rcar_du_encoder.c
index 34a122a39664..279167f783f6 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_encoder.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_encoder.c
@@ -46,6 +46,9 @@ static void rcar_du_encoder_dpms(struct drm_encoder *encoder, int mode)
 {
 	struct rcar_du_encoder *renc = to_rcar_encoder(encoder);
 
+	if (mode != DRM_MODE_DPMS_ON)
+		mode = DRM_MODE_DPMS_OFF;
+
 	if (renc->lvds)
 		rcar_du_lvdsenc_dpms(renc->lvds, encoder->crtc, mode);
 }
@@ -190,35 +193,42 @@ int rcar_du_encoder_init(struct rcar_du_device *rcdu,
 	}
 
 	if (type == RCAR_DU_ENCODER_HDMI) {
-		if (renc->lvds) {
-			dev_err(rcdu->dev,
-				"Chaining LVDS and HDMI encoders not supported\n");
-			return -EINVAL;
-		}
-
 		ret = rcar_du_hdmienc_init(rcdu, renc, enc_node);
 		if (ret < 0)
-			return ret;
+			goto done;
 	} else {
 		ret = drm_encoder_init(rcdu->ddev, encoder, &encoder_funcs,
 				       encoder_type);
 		if (ret < 0)
-			return ret;
+			goto done;
 
 		drm_encoder_helper_add(encoder, &encoder_helper_funcs);
 	}
 
 	switch (encoder_type) {
 	case DRM_MODE_ENCODER_LVDS:
-		return rcar_du_lvds_connector_init(rcdu, renc, con_node);
+		ret = rcar_du_lvds_connector_init(rcdu, renc, con_node);
+		break;
 
 	case DRM_MODE_ENCODER_DAC:
-		return rcar_du_vga_connector_init(rcdu, renc);
+		ret = rcar_du_vga_connector_init(rcdu, renc);
+		break;
 
 	case DRM_MODE_ENCODER_TMDS:
-		return rcar_du_hdmi_connector_init(rcdu, renc);
+		ret = rcar_du_hdmi_connector_init(rcdu, renc);
+		break;
 
 	default:
-		return -EINVAL;
+		ret = -EINVAL;
+		break;
 	}
+
+done:
+	if (ret < 0) {
+		if (encoder->name)
+			encoder->funcs->destroy(encoder);
+		devm_kfree(rcdu->dev, renc);
+	}
+
+	return ret;
 }
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_group.c b/drivers/gpu/drm/rcar-du/rcar_du_group.c
index 4e7614b145db..1bdc0ee0c248 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_group.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_group.c
@@ -48,9 +48,6 @@ static void rcar_du_group_setup_defr8(struct rcar_du_group *rgrp)
 {
 	u32 defr8 = DEFR8_CODE | DEFR8_DEFE8;
 
-	if (!rcar_du_has(rgrp->dev, RCAR_DU_FEATURE_DEFR8))
-		return;
-
 	/* The DEFR8 register for the first group also controls RGB output
 	 * routing to DPAD0
 	 */
@@ -69,7 +66,20 @@ static void rcar_du_group_setup(struct rcar_du_group *rgrp)
 	rcar_du_group_write(rgrp, DEFR4, DEFR4_CODE);
 	rcar_du_group_write(rgrp, DEFR5, DEFR5_CODE | DEFR5_DEFE5);
 
-	rcar_du_group_setup_defr8(rgrp);
+	if (rcar_du_has(rgrp->dev, RCAR_DU_FEATURE_EXT_CTRL_REGS)) {
+		rcar_du_group_setup_defr8(rgrp);
+
+		/* Configure input dot clock routing. We currently hardcode the
+		 * configuration to routing DOTCLKINn to DUn.
+		 */
+		rcar_du_group_write(rgrp, DIDSR, DIDSR_CODE |
+				    DIDSR_LCDS_DCLKIN(2) |
+				    DIDSR_LCDS_DCLKIN(1) |
+				    DIDSR_LCDS_DCLKIN(0) |
+				    DIDSR_PDCS_CLK(2, 0) |
+				    DIDSR_PDCS_CLK(1, 0) |
+				    DIDSR_PDCS_CLK(0, 0));
+	}
 
 	/* Use DS1PR and DS2PR to configure planes priorities and connects the
 	 * superposition 0 to DU0 pins. DU1 pins will be configured dynamically.
@@ -149,6 +159,9 @@ static int rcar_du_set_dpad0_routing(struct rcar_du_device *rcdu)
 {
 	int ret;
 
+	if (!rcar_du_has(rcdu, RCAR_DU_FEATURE_EXT_CTRL_REGS))
+		return 0;
+
 	/* RGB output routing to DPAD0 is configured in the DEFR8 register of
 	 * the first group. As this function can be called with the DU0 and DU1
 	 * CRTCs disabled, we need to enable the first group clock before
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_hdmicon.c b/drivers/gpu/drm/rcar-du/rcar_du_hdmicon.c
index 4d7d4dd46d26..ca94b029ac80 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_hdmicon.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_hdmicon.c
@@ -95,6 +95,8 @@ int rcar_du_hdmi_connector_init(struct rcar_du_device *rcdu,
 	connector = &rcon->connector;
 	connector->display_info.width_mm = 0;
 	connector->display_info.height_mm = 0;
+	connector->interlace_allowed = true;
+	connector->polled = DRM_CONNECTOR_POLL_HPD;
 
 	ret = drm_connector_init(rcdu->ddev, connector, &connector_funcs,
 				 DRM_MODE_CONNECTOR_HDMIA);
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_hdmienc.c b/drivers/gpu/drm/rcar-du/rcar_du_hdmienc.c
index 359bc999a9c8..221f0a17fd6a 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_hdmienc.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_hdmienc.c
@@ -21,6 +21,7 @@
 #include "rcar_du_drv.h"
 #include "rcar_du_encoder.h"
 #include "rcar_du_hdmienc.h"
+#include "rcar_du_lvdsenc.h"
 
 struct rcar_du_hdmienc {
 	struct rcar_du_encoder *renc;
@@ -36,12 +37,21 @@ static void rcar_du_hdmienc_dpms(struct drm_encoder *encoder, int mode)
 	struct rcar_du_hdmienc *hdmienc = to_rcar_hdmienc(encoder);
 	struct drm_encoder_slave_funcs *sfuncs = to_slave_funcs(encoder);
 
+	if (mode != DRM_MODE_DPMS_ON)
+		mode = DRM_MODE_DPMS_OFF;
+
 	if (hdmienc->dpms == mode)
 		return;
 
+	if (mode == DRM_MODE_DPMS_ON && hdmienc->renc->lvds)
+		rcar_du_lvdsenc_dpms(hdmienc->renc->lvds, encoder->crtc, mode);
+
 	if (sfuncs->dpms)
 		sfuncs->dpms(encoder, mode);
 
+	if (mode != DRM_MODE_DPMS_ON && hdmienc->renc->lvds)
+		rcar_du_lvdsenc_dpms(hdmienc->renc->lvds, encoder->crtc, mode);
+
 	hdmienc->dpms = mode;
 }
 
@@ -49,8 +59,16 @@ static bool rcar_du_hdmienc_mode_fixup(struct drm_encoder *encoder,
 				       const struct drm_display_mode *mode,
 				       struct drm_display_mode *adjusted_mode)
 {
+	struct rcar_du_hdmienc *hdmienc = to_rcar_hdmienc(encoder);
 	struct drm_encoder_slave_funcs *sfuncs = to_slave_funcs(encoder);
 
+	/* The internal LVDS encoder has a clock frequency operating range of
+	 * 30MHz to 150MHz. Clamp the clock accordingly.
+	 */
+	if (hdmienc->renc->lvds)
+		adjusted_mode->clock = clamp(adjusted_mode->clock,
+					     30000, 150000);
+
 	if (sfuncs->mode_fixup == NULL)
 		return true;
 
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_kms.c b/drivers/gpu/drm/rcar-du/rcar_du_kms.c
index 0c5ee616b5a3..cc9136e8ee9c 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_kms.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_kms.c
@@ -346,8 +346,14 @@ static int rcar_du_encoders_init(struct rcar_du_device *rcdu)
 		/* Process the output pipeline. */
 		ret = rcar_du_encoders_init_one(rcdu, output, &ep);
 		if (ret < 0) {
-			of_node_put(ep_node);
-			return ret;
+			if (ret == -EPROBE_DEFER) {
+				of_node_put(ep_node);
+				return ret;
+			}
+
+			dev_info(rcdu->dev,
+				 "encoder initialization failed, skipping\n");
+			continue;
 		}
 
 		num_encoders += ret;
@@ -413,6 +419,11 @@ int rcar_du_modeset_init(struct rcar_du_device *rcdu)
 	if (ret < 0)
 		return ret;
 
+	if (ret == 0) {
+		dev_err(rcdu->dev, "error: no encoder could be initialized\n");
+		return -EINVAL;
+	}
+
 	num_encoders = ret;
 
 	/* Set the possible CRTCs and possible clones. There's always at least
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_plane.c b/drivers/gpu/drm/rcar-du/rcar_du_plane.c
index 72a7cb47bd9f..50f2f2b20d39 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_plane.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_plane.c
@@ -104,14 +104,22 @@ void rcar_du_plane_update_base(struct rcar_du_plane *plane)
 {
 	struct rcar_du_group *rgrp = plane->group;
 	unsigned int index = plane->hwindex;
+	bool interlaced;
 	u32 mwr;
 
-	/* Memory pitch (expressed in pixels) */
+	interlaced = plane->crtc->mode.flags & DRM_MODE_FLAG_INTERLACE;
+
+	/* Memory pitch (expressed in pixels). Must be doubled for interlaced
+	 * operation with 32bpp formats.
+	 */
 	if (plane->format->planes == 2)
 		mwr = plane->pitch;
 	else
 		mwr = plane->pitch * 8 / plane->format->bpp;
 
+	if (interlaced && plane->format->bpp == 32)
+		mwr *= 2;
+
 	rcar_du_plane_write(rgrp, index, PnMWR, mwr);
 
 	/* The Y position is expressed in raster line units and must be doubled
@@ -119,17 +127,23 @@ void rcar_du_plane_update_base(struct rcar_du_plane *plane)
 	 * doubling the Y position is found in the R8A7779 datasheet, but the
 	 * rule seems to apply there as well.
 	 *
+	 * Despite not being documented, doubling seem not to be needed when
+	 * operating in interlaced mode.
+	 *
 	 * Similarly, for the second plane, NV12 and NV21 formats seem to
-	 * require a halved Y position value.
+	 * require a halved Y position value, in both progressive and interlaced
+	 * modes.
 	 */
 	rcar_du_plane_write(rgrp, index, PnSPXR, plane->src_x);
 	rcar_du_plane_write(rgrp, index, PnSPYR, plane->src_y *
-			    (plane->format->bpp == 32 ? 2 : 1));
+			    (!interlaced && plane->format->bpp == 32 ? 2 : 1));
 	rcar_du_plane_write(rgrp, index, PnDSA0R, plane->dma[0]);
 
 	if (plane->format->planes == 2) {
 		index = (index + 1) % 8;
 
+		rcar_du_plane_write(rgrp, index, PnMWR, plane->pitch);
+
 		rcar_du_plane_write(rgrp, index, PnSPXR, plane->src_x);
 		rcar_du_plane_write(rgrp, index, PnSPYR, plane->src_y *
 				    (plane->format->bpp == 16 ? 2 : 1) / 2);
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_regs.h b/drivers/gpu/drm/rcar-du/rcar_du_regs.h
index 73f7347f740b..70fcbc471ebd 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_regs.h
+++ b/drivers/gpu/drm/rcar-du/rcar_du_regs.h
@@ -34,6 +34,7 @@
 #define DSYSR_SCM_INT_NONE	(0 << 4)
 #define DSYSR_SCM_INT_SYNC	(2 << 4)
 #define DSYSR_SCM_INT_VIDEO	(3 << 4)
+#define DSYSR_SCM_MASK		(3 << 4)
 
 #define DSMR			0x00004
 #define DSMR_VSPM		(1 << 28)
@@ -256,8 +257,8 @@
 #define DIDSR_LCDS_LVDS0(n)	(2 << (8 + (n) * 2))
 #define DIDSR_LCDS_LVDS1(n)	(3 << (8 + (n) * 2))
 #define DIDSR_LCDS_MASK(n)	(3 << (8 + (n) * 2))
-#define DIDSR_PCDS_CLK(n, clk)	(clk << ((n) * 2))
-#define DIDSR_PCDS_MASK(n)	(3 << ((n) * 2))
+#define DIDSR_PDCS_CLK(n, clk)	(clk << ((n) * 2))
+#define DIDSR_PDCS_MASK(n)	(3 << ((n) * 2))
 
 /* -----------------------------------------------------------------------------
  * Display Timing Generation Registers
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_vgacon.c b/drivers/gpu/drm/rcar-du/rcar_du_vgacon.c
index 752747a5e920..9d4879921cc7 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_vgacon.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_vgacon.c
@@ -64,6 +64,7 @@ int rcar_du_vga_connector_init(struct rcar_du_device *rcdu,
 	connector = &rcon->connector;
 	connector->display_info.width_mm = 0;
 	connector->display_info.height_mm = 0;
+	connector->interlace_allowed = true;
 
 	ret = drm_connector_init(rcdu->ddev, connector, &connector_funcs,
 				 DRM_MODE_CONNECTOR_VGA);