Merge tag 'drm-misc-next-2024-06-06' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-next

drm-misc-next for 6.10:

UAPI Changes:

Cross-subsystem Changes:
  - dma-buf: Warn when reserving 0 fence slots, internal API
    enhancements for heaps

Core Changes:

Driver Changes:
  - atmel-hlcdc: Support XLCDC in sam9x7
  - msm: Validate registers XML description against schema in CI
  - v3d: Fix build warning
  - bridges:
    - analogix_dp: Various improvements
  - panels:
    - New panel: WL-355608-A8

Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Maxime Ripard <mripard@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240606-vivid-amphibian-jackrabbit-40b1d1@houat

20 files changed, 1230 insertions, 554 deletions

diff --git a/Documentation/devicetree/bindings/display/panel/wl-355608-a8.yaml b/Documentation/devicetree/bindings/display/panel/wl-355608-a8.yaml
new file mode 100644
index 000000000000..e552d01b52b9
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/panel/wl-355608-a8.yaml
@@ -0,0 +1,60 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/panel/wl-355608-a8.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: WL-355608-A8 3.5" (640x480 pixels) 24-bit IPS LCD panel
+
+maintainers:
+  - Ryan Walklin <ryan@testtoast.com>
+
+allOf:
+  - $ref: panel-common.yaml#
+  - $ref: /schemas/spi/spi-peripheral-props.yaml#
+
+properties:
+  compatible:
+    const: wl-355608-a8
+
+  reg:
+    maxItems: 1
+
+  spi-3wire: true
+
+required:
+  - compatible
+  - reg
+  - port
+  - power-supply
+  - reset-gpios
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    spi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        panel@0 {
+            compatible = "wl-355608-a8";
+            reg = <0>;
+
+            spi-3wire;
+            spi-max-frequency = <3125000>;
+
+            reset-gpios = <&pio 8 14 GPIO_ACTIVE_LOW>; // PI14
+
+            backlight = <&backlight>;
+            power-supply = <&reg_lcd>;
+
+            port {
+                endpoint {
+                    remote-endpoint = <&tcon_lcd0_out_lcd>;
+                };
+            };
+        };
+    };
diff --git a/MAINTAINERS b/MAINTAINERS
index b333782bdd83..6a1660480782 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -7566,7 +7566,6 @@ F:	include/drm/gpu_scheduler.h
 DRM PANEL DRIVERS
 M:	Neil Armstrong <neil.armstrong@linaro.org>
 R:	Jessica Zhang <quic_jesszhan@quicinc.com>
-R:	Sam Ravnborg <sam@ravnborg.org>
 L:	dri-devel@lists.freedesktop.org
 S:	Maintained
 T:	git https://gitlab.freedesktop.org/drm/misc/kernel.git
diff --git a/drivers/dma-buf/dma-heap.c b/drivers/dma-buf/dma-heap.c
index 84ae708fafe7..2298ca5e112e 100644
--- a/drivers/dma-buf/dma-heap.c
+++ b/drivers/dma-buf/dma-heap.c
@@ -50,8 +50,8 @@ static struct class *dma_heap_class;
 static DEFINE_XARRAY_ALLOC(dma_heap_minors);
 
 static int dma_heap_buffer_alloc(struct dma_heap *heap, size_t len,
-				 unsigned int fd_flags,
-				 unsigned int heap_flags)
+				 u32 fd_flags,
+				 u64 heap_flags)
 {
 	struct dma_buf *dmabuf;
 	int fd;
diff --git a/drivers/dma-buf/dma-resv.c b/drivers/dma-buf/dma-resv.c
index e2869fb31140..5f8d010516f0 100644
--- a/drivers/dma-buf/dma-resv.c
+++ b/drivers/dma-buf/dma-resv.c
@@ -186,6 +186,13 @@ int dma_resv_reserve_fences(struct dma_resv *obj, unsigned int num_fences)
 
 	dma_resv_assert_held(obj);
 
+	/* Driver and component code should never call this function with
+	 * num_fences=0. If they do it usually points to bugs when calculating
+	 * the number of needed fences dynamically.
+	 */
+	if (WARN_ON(!num_fences))
+		return -EINVAL;
+
 	old = dma_resv_fences_list(obj);
 	if (old && old->max_fences) {
 		if ((old->num_fences + num_fences) <= old->max_fences)
diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
index cc5cf4c2faf7..0f7ffb3ced20 100644
--- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
+++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
@@ -30,10 +30,12 @@
  *
  * @base: base CRTC state
  * @output_mode: RGBXXX output mode
+ * @dpi: output DPI mode
  */
 struct atmel_hlcdc_crtc_state {
 	struct drm_crtc_state base;
 	unsigned int output_mode;
+	u8 dpi;
 };
 
 static inline struct atmel_hlcdc_crtc_state *
@@ -164,18 +166,24 @@ static void atmel_hlcdc_crtc_mode_set_nofb(struct drm_crtc *c)
 	state = drm_crtc_state_to_atmel_hlcdc_crtc_state(c->state);
 	cfg = state->output_mode << 8;
 
-	if (adj->flags & DRM_MODE_FLAG_NVSYNC)
-		cfg |= ATMEL_HLCDC_VSPOL;
+	if (!crtc->dc->desc->is_xlcdc) {
+		if (adj->flags & DRM_MODE_FLAG_NVSYNC)
+			cfg |= ATMEL_HLCDC_VSPOL;
 
-	if (adj->flags & DRM_MODE_FLAG_NHSYNC)
-		cfg |= ATMEL_HLCDC_HSPOL;
+		if (adj->flags & DRM_MODE_FLAG_NHSYNC)
+			cfg |= ATMEL_HLCDC_HSPOL;
+	} else {
+		cfg |= state->dpi << 11;
+	}
 
 	regmap_update_bits(regmap, ATMEL_HLCDC_CFG(5),
 			   ATMEL_HLCDC_HSPOL | ATMEL_HLCDC_VSPOL |
 			   ATMEL_HLCDC_VSPDLYS | ATMEL_HLCDC_VSPDLYE |
 			   ATMEL_HLCDC_DISPPOL | ATMEL_HLCDC_DISPDLY |
 			   ATMEL_HLCDC_VSPSU | ATMEL_HLCDC_VSPHO |
-			   ATMEL_HLCDC_GUARDTIME_MASK | ATMEL_HLCDC_MODE_MASK,
+			   ATMEL_HLCDC_GUARDTIME_MASK |
+			   (crtc->dc->desc->is_xlcdc ? ATMEL_XLCDC_MODE_MASK |
+			   ATMEL_XLCDC_DPI : ATMEL_HLCDC_MODE_MASK),
 			   cfg);
 
 	clk_disable_unprepare(crtc->dc->hlcdc->sys_clk);
@@ -202,20 +210,37 @@ static void atmel_hlcdc_crtc_atomic_disable(struct drm_crtc *c,
 
 	pm_runtime_get_sync(dev->dev);
 
+	if (crtc->dc->desc->is_xlcdc) {
+		regmap_write(regmap, ATMEL_HLCDC_DIS, ATMEL_XLCDC_CM);
+		if (regmap_read_poll_timeout(regmap, ATMEL_HLCDC_SR, status,
+					     !(status & ATMEL_XLCDC_CM),
+					     10, 1000))
+			dev_warn(dev->dev, "Atmel LCDC status register CMSTS timeout\n");
+
+		regmap_write(regmap, ATMEL_HLCDC_DIS, ATMEL_XLCDC_SD);
+		if (regmap_read_poll_timeout(regmap, ATMEL_HLCDC_SR, status,
+					     status & ATMEL_XLCDC_SD,
+					     10, 1000))
+			dev_warn(dev->dev, "Atmel LCDC status register SDSTS timeout\n");
+	}
+
 	regmap_write(regmap, ATMEL_HLCDC_DIS, ATMEL_HLCDC_DISP);
-	while (!regmap_read(regmap, ATMEL_HLCDC_SR, &status) &&
-	       (status & ATMEL_HLCDC_DISP))
-		cpu_relax();
+	if (regmap_read_poll_timeout(regmap, ATMEL_HLCDC_SR, status,
+				     !(status & ATMEL_HLCDC_DISP),
+				    10, 1000))
+		dev_warn(dev->dev, "Atmel LCDC status register DISPSTS timeout\n");
 
 	regmap_write(regmap, ATMEL_HLCDC_DIS, ATMEL_HLCDC_SYNC);
-	while (!regmap_read(regmap, ATMEL_HLCDC_SR, &status) &&
-	       (status & ATMEL_HLCDC_SYNC))
-		cpu_relax();
+	if (regmap_read_poll_timeout(regmap, ATMEL_HLCDC_SR, status,
+				     !(status & ATMEL_HLCDC_SYNC),
+				    10, 1000))
+		dev_warn(dev->dev, "Atmel LCDC status register LCDSTS timeout\n");
 
 	regmap_write(regmap, ATMEL_HLCDC_DIS, ATMEL_HLCDC_PIXEL_CLK);
-	while (!regmap_read(regmap, ATMEL_HLCDC_SR, &status) &&
-	       (status & ATMEL_HLCDC_PIXEL_CLK))
-		cpu_relax();
+	if (regmap_read_poll_timeout(regmap, ATMEL_HLCDC_SR, status,
+				     !(status & ATMEL_HLCDC_PIXEL_CLK),
+				    10, 1000))
+		dev_warn(dev->dev, "Atmel LCDC status register CLKSTS timeout\n");
 
 	clk_disable_unprepare(crtc->dc->hlcdc->sys_clk);
 	pinctrl_pm_select_sleep_state(dev->dev);
@@ -241,30 +266,95 @@ static void atmel_hlcdc_crtc_atomic_enable(struct drm_crtc *c,
 	clk_prepare_enable(crtc->dc->hlcdc->sys_clk);
 
 	regmap_write(regmap, ATMEL_HLCDC_EN, ATMEL_HLCDC_PIXEL_CLK);
-	while (!regmap_read(regmap, ATMEL_HLCDC_SR, &status) &&
-	       !(status & ATMEL_HLCDC_PIXEL_CLK))
-		cpu_relax();
-
+	if (regmap_read_poll_timeout(regmap, ATMEL_HLCDC_SR, status,
+				     status & ATMEL_HLCDC_PIXEL_CLK,
+				     10, 1000))
+		dev_warn(dev->dev, "Atmel LCDC status register CLKSTS timeout\n");
 
 	regmap_write(regmap, ATMEL_HLCDC_EN, ATMEL_HLCDC_SYNC);
-	while (!regmap_read(regmap, ATMEL_HLCDC_SR, &status) &&
-	       !(status & ATMEL_HLCDC_SYNC))
-		cpu_relax();
+	if (regmap_read_poll_timeout(regmap, ATMEL_HLCDC_SR, status,
+				     status & ATMEL_HLCDC_SYNC,
+				     10, 1000))
+		dev_warn(dev->dev, "Atmel LCDC status register LCDSTS timeout\n");
 
 	regmap_write(regmap, ATMEL_HLCDC_EN, ATMEL_HLCDC_DISP);
-	while (!regmap_read(regmap, ATMEL_HLCDC_SR, &status) &&
-	       !(status & ATMEL_HLCDC_DISP))
-		cpu_relax();
+	if (regmap_read_poll_timeout(regmap, ATMEL_HLCDC_SR, status,
+				     status & ATMEL_HLCDC_DISP,
+				     10, 1000))
+		dev_warn(dev->dev, "Atmel LCDC status register DISPSTS timeout\n");
+
+	if (crtc->dc->desc->is_xlcdc) {
+		regmap_write(regmap, ATMEL_HLCDC_EN, ATMEL_XLCDC_CM);
+		if (regmap_read_poll_timeout(regmap, ATMEL_HLCDC_SR, status,
+					     status & ATMEL_XLCDC_CM,
+					     10, 1000))
+			dev_warn(dev->dev, "Atmel LCDC status register CMSTS timeout\n");
+
+		regmap_write(regmap, ATMEL_HLCDC_EN, ATMEL_XLCDC_SD);
+		if (regmap_read_poll_timeout(regmap, ATMEL_HLCDC_SR, status,
+					     !(status & ATMEL_XLCDC_SD),
+					     10, 1000))
+			dev_warn(dev->dev, "Atmel LCDC status register SDSTS timeout\n");
+	}
 
 	pm_runtime_put_sync(dev->dev);
 
 }
 
-#define ATMEL_HLCDC_RGB444_OUTPUT	BIT(0)
-#define ATMEL_HLCDC_RGB565_OUTPUT	BIT(1)
-#define ATMEL_HLCDC_RGB666_OUTPUT	BIT(2)
-#define ATMEL_HLCDC_RGB888_OUTPUT	BIT(3)
-#define ATMEL_HLCDC_OUTPUT_MODE_MASK	GENMASK(3, 0)
+#define ATMEL_HLCDC_RGB444_OUTPUT		BIT(0)
+#define ATMEL_HLCDC_RGB565_OUTPUT		BIT(1)
+#define ATMEL_HLCDC_RGB666_OUTPUT		BIT(2)
+#define ATMEL_HLCDC_RGB888_OUTPUT		BIT(3)
+#define ATMEL_HLCDC_DPI_RGB565C1_OUTPUT		BIT(4)
+#define ATMEL_HLCDC_DPI_RGB565C2_OUTPUT		BIT(5)
+#define ATMEL_HLCDC_DPI_RGB565C3_OUTPUT		BIT(6)
+#define ATMEL_HLCDC_DPI_RGB666C1_OUTPUT		BIT(7)
+#define ATMEL_HLCDC_DPI_RGB666C2_OUTPUT		BIT(8)
+#define ATMEL_HLCDC_DPI_RGB888_OUTPUT		BIT(9)
+#define ATMEL_HLCDC_OUTPUT_MODE_MASK		GENMASK(3, 0)
+#define ATMEL_XLCDC_OUTPUT_MODE_MASK		GENMASK(9, 0)
+
+static int atmel_xlcdc_connector_output_dsi(struct drm_encoder *encoder,
+					    struct drm_display_info *info)
+{
+	int j;
+	unsigned int supported_fmts = 0;
+
+	switch (atmel_hlcdc_encoder_get_bus_fmt(encoder)) {
+	case 0:
+		break;
+	case MEDIA_BUS_FMT_RGB565_1X16:
+		return ATMEL_HLCDC_DPI_RGB565C1_OUTPUT;
+	case MEDIA_BUS_FMT_RGB666_1X18:
+		return ATMEL_HLCDC_DPI_RGB666C1_OUTPUT;
+	case MEDIA_BUS_FMT_RGB666_1X24_CPADHI:
+		return ATMEL_HLCDC_DPI_RGB666C2_OUTPUT;
+	case MEDIA_BUS_FMT_RGB888_1X24:
+		return ATMEL_HLCDC_DPI_RGB888_OUTPUT;
+	default:
+		return -EINVAL;
+	}
+
+	for (j = 0; j < info->num_bus_formats; j++) {
+		switch (info->bus_formats[j]) {
+		case MEDIA_BUS_FMT_RGB565_1X16:
+			supported_fmts |= ATMEL_HLCDC_DPI_RGB565C1_OUTPUT;
+			break;
+		case MEDIA_BUS_FMT_RGB666_1X18:
+			supported_fmts |= ATMEL_HLCDC_DPI_RGB666C1_OUTPUT;
+			break;
+		case MEDIA_BUS_FMT_RGB666_1X24_CPADHI:
+			supported_fmts |= ATMEL_HLCDC_DPI_RGB666C2_OUTPUT;
+			break;
+		case MEDIA_BUS_FMT_RGB888_1X24:
+			supported_fmts |= ATMEL_HLCDC_DPI_RGB888_OUTPUT;
+			break;
+		default:
+			break;
+		}
+	}
+	return supported_fmts;
+}
 
 static int atmel_hlcdc_connector_output_mode(struct drm_connector_state *state)
 {
@@ -277,6 +367,13 @@ static int atmel_hlcdc_connector_output_mode(struct drm_connector_state *state)
 	encoder = state->best_encoder;
 	if (!encoder)
 		encoder = connector->encoder;
+	/*
+	 * atmel-hlcdc to support DSI formats with DSI video pipeline
+	 * when DRM_MODE_ENCODER_DSI type is set by
+	 * connector driver component.
+	 */
+	if (encoder->encoder_type == DRM_MODE_ENCODER_DSI)
+		return atmel_xlcdc_connector_output_dsi(encoder, info);
 
 	switch (atmel_hlcdc_encoder_get_bus_fmt(encoder)) {
 	case 0:
@@ -317,7 +414,7 @@ static int atmel_hlcdc_connector_output_mode(struct drm_connector_state *state)
 
 static int atmel_hlcdc_crtc_select_output_mode(struct drm_crtc_state *state)
 {
-	unsigned int output_fmts = ATMEL_HLCDC_OUTPUT_MODE_MASK;
+	unsigned int output_fmts;
 	struct atmel_hlcdc_crtc_state *hstate;
 	struct drm_connector_state *cstate;
 	struct drm_connector *connector;
@@ -325,6 +422,8 @@ static int atmel_hlcdc_crtc_select_output_mode(struct drm_crtc_state *state)
 	int i;
 
 	crtc = drm_crtc_to_atmel_hlcdc_crtc(state->crtc);
+	output_fmts = crtc->dc->desc->is_xlcdc ? ATMEL_XLCDC_OUTPUT_MODE_MASK :
+		      ATMEL_HLCDC_OUTPUT_MODE_MASK;
 
 	for_each_new_connector_in_state(state->state, connector, cstate, i) {
 		unsigned int supported_fmts = 0;
@@ -345,7 +444,15 @@ static int atmel_hlcdc_crtc_select_output_mode(struct drm_crtc_state *state)
 
 	hstate = drm_crtc_state_to_atmel_hlcdc_crtc_state(state);
 	hstate->output_mode = fls(output_fmts) - 1;
-
+	if (crtc->dc->desc->is_xlcdc) {
+		/* check if MIPI DPI bit needs to be set */
+		if (fls(output_fmts) > 3) {
+			hstate->output_mode -= 4;
+			hstate->dpi = 1;
+		} else {
+			hstate->dpi = 0;
+		}
+	}
 	return 0;
 }
 
@@ -449,6 +556,7 @@ static struct drm_crtc_state *
 atmel_hlcdc_crtc_duplicate_state(struct drm_crtc *crtc)
 {
 	struct atmel_hlcdc_crtc_state *state, *cur;
+	struct atmel_hlcdc_crtc *c = drm_crtc_to_atmel_hlcdc_crtc(crtc);
 
 	if (WARN_ON(!crtc->state))
 		return NULL;
@@ -460,6 +568,8 @@ atmel_hlcdc_crtc_duplicate_state(struct drm_crtc *crtc)
 
 	cur = drm_crtc_state_to_atmel_hlcdc_crtc_state(crtc->state);
 	state->output_mode = cur->output_mode;
+	if (c->dc->desc->is_xlcdc)
+		state->dpi = cur->dpi;
 
 	return &state->base;
 }
diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c
index 84c54e8622d1..9ce429f889ca 100644
--- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c
+++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c
@@ -58,6 +58,7 @@ static const struct atmel_hlcdc_dc_desc atmel_hlcdc_dc_at91sam9n12 = {
 	.conflicting_output_formats = true,
 	.nlayers = ARRAY_SIZE(atmel_hlcdc_at91sam9n12_layers),
 	.layers = atmel_hlcdc_at91sam9n12_layers,
+	.ops = &atmel_hlcdc_ops,
 };
 
 static const struct atmel_hlcdc_layer_desc atmel_hlcdc_at91sam9x5_layers[] = {
@@ -151,6 +152,7 @@ static const struct atmel_hlcdc_dc_desc atmel_hlcdc_dc_at91sam9x5 = {
 	.conflicting_output_formats = true,
 	.nlayers = ARRAY_SIZE(atmel_hlcdc_at91sam9x5_layers),
 	.layers = atmel_hlcdc_at91sam9x5_layers,
+	.ops = &atmel_hlcdc_ops,
 };
 
 static const struct atmel_hlcdc_layer_desc atmel_hlcdc_sama5d3_layers[] = {
@@ -269,6 +271,7 @@ static const struct atmel_hlcdc_dc_desc atmel_hlcdc_dc_sama5d3 = {
 	.conflicting_output_formats = true,
 	.nlayers = ARRAY_SIZE(atmel_hlcdc_sama5d3_layers),
 	.layers = atmel_hlcdc_sama5d3_layers,
+	.ops = &atmel_hlcdc_ops,
 };
 
 static const struct atmel_hlcdc_layer_desc atmel_hlcdc_sama5d4_layers[] = {
@@ -364,6 +367,7 @@ static const struct atmel_hlcdc_dc_desc atmel_hlcdc_dc_sama5d4 = {
 	.max_hpw = 0x3ff,
 	.nlayers = ARRAY_SIZE(atmel_hlcdc_sama5d4_layers),
 	.layers = atmel_hlcdc_sama5d4_layers,
+	.ops = &atmel_hlcdc_ops,
 };
 
 static const struct atmel_hlcdc_layer_desc atmel_hlcdc_sam9x60_layers[] = {
@@ -460,6 +464,103 @@ static const struct atmel_hlcdc_dc_desc atmel_hlcdc_dc_sam9x60 = {
 	.fixed_clksrc = true,
 	.nlayers = ARRAY_SIZE(atmel_hlcdc_sam9x60_layers),
 	.layers = atmel_hlcdc_sam9x60_layers,
+	.ops = &atmel_hlcdc_ops,
+};
+
+static const struct atmel_hlcdc_layer_desc atmel_xlcdc_sam9x75_layers[] = {
+	{
+		.name = "base",
+		.formats = &atmel_hlcdc_plane_rgb_formats,
+		.regs_offset = 0x60,
+		.id = 0,
+		.type = ATMEL_HLCDC_BASE_LAYER,
+		.cfgs_offset = 0x1c,
+		.layout = {
+			.xstride = { 2 },
+			.default_color = 3,
+			.general_config = 4,
+			.disc_pos = 5,
+			.disc_size = 6,
+		},
+		.clut_offset = 0x700,
+	},
+	{
+		.name = "overlay1",
+		.formats = &atmel_hlcdc_plane_rgb_formats,
+		.regs_offset = 0x160,
+		.id = 1,
+		.type = ATMEL_HLCDC_OVERLAY_LAYER,
+		.cfgs_offset = 0x1c,
+		.layout = {
+			.pos = 2,
+			.size = 3,
+			.xstride = { 4 },
+			.pstride = { 5 },
+			.default_color = 6,
+			.chroma_key = 7,
+			.chroma_key_mask = 8,
+			.general_config = 9,
+		},
+		.clut_offset = 0xb00,
+	},
+	{
+		.name = "overlay2",
+		.formats = &atmel_hlcdc_plane_rgb_formats,
+		.regs_offset = 0x260,
+		.id = 2,
+		.type = ATMEL_HLCDC_OVERLAY_LAYER,
+		.cfgs_offset = 0x1c,
+		.layout = {
+			.pos = 2,
+			.size = 3,
+			.xstride = { 4 },
+			.pstride = { 5 },
+			.default_color = 6,
+			.chroma_key = 7,
+			.chroma_key_mask = 8,
+			.general_config = 9,
+		},
+		.clut_offset = 0xf00,
+	},
+	{
+		.name = "high-end-overlay",
+		.formats = &atmel_hlcdc_plane_rgb_and_yuv_formats,
+		.regs_offset = 0x360,
+		.id = 3,
+		.type = ATMEL_HLCDC_OVERLAY_LAYER,
+		.cfgs_offset = 0x30,
+		.layout = {
+			.pos = 2,
+			.size = 3,
+			.memsize = 4,
+			.xstride = { 5, 7 },
+			.pstride = { 6, 8 },
+			.default_color = 9,
+			.chroma_key = 10,
+			.chroma_key_mask = 11,
+			.general_config = 12,
+			.csc = 16,
+			.scaler_config = 23,
+			.vxs_config = 30,
+			.hxs_config = 31,
+		},
+		.clut_offset = 0x1300,
+	},
+};
+
+static const struct atmel_hlcdc_dc_desc atmel_xlcdc_dc_sam9x75 = {
+	.min_width = 0,
+	.min_height = 0,
+	.max_width = 2048,
+	.max_height = 2048,
+	.max_spw = 0x3ff,
+	.max_vpw = 0x3ff,
+	.max_hpw = 0x3ff,
+	.fixed_clksrc = true,
+	.is_xlcdc = true,
+	.nlayers = ARRAY_SIZE(atmel_xlcdc_sam9x75_layers),
+	.layers = atmel_xlcdc_sam9x75_layers,
+	.ops = &atmel_xlcdc_ops,
 };
 
 static const struct of_device_id atmel_hlcdc_of_match[] = {
@@ -487,6 +588,10 @@ static const struct of_device_id atmel_hlcdc_of_match[] = {
 		.compatible = "microchip,sam9x60-hlcdc",
 		.data = &atmel_hlcdc_dc_sam9x60,
 	},
+	{
+		.compatible = "microchip,sam9x75-xlcdc",
+		.data = &atmel_xlcdc_dc_sam9x75,
+	},
 	{ /* sentinel */ },
 };
 MODULE_DEVICE_TABLE(of, atmel_hlcdc_of_match);
diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.h b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.h
index 5b5c774e0edf..e1a0bb24b511 100644
--- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.h
+++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.h
@@ -15,6 +15,7 @@
 
 #include <drm/drm_plane.h>
 
+/* LCD controller common registers */
 #define ATMEL_HLCDC_LAYER_CHER			0x0
 #define ATMEL_HLCDC_LAYER_CHDR			0x4
 #define ATMEL_HLCDC_LAYER_CHSR			0x8
@@ -128,6 +129,47 @@
 
 #define ATMEL_HLCDC_MAX_LAYERS			6
 
+/* XLCDC controller specific registers */
+#define ATMEL_XLCDC_LAYER_ENR			0x10
+#define ATMEL_XLCDC_LAYER_EN			BIT(0)
+
+#define ATMEL_XLCDC_LAYER_IER			0x0
+#define ATMEL_XLCDC_LAYER_IDR			0x4
+#define ATMEL_XLCDC_LAYER_ISR			0xc
+#define ATMEL_XLCDC_LAYER_OVR_IRQ(p)		BIT(2 + (8 * (p)))
+
+#define ATMEL_XLCDC_LAYER_PLANE_ADDR(p)		(((p) * 0x4) + 0x18)
+
+#define ATMEL_XLCDC_LAYER_DMA_CFG		0
+
+#define ATMEL_XLCDC_LAYER_DMA			BIT(0)
+#define ATMEL_XLCDC_LAYER_REP			BIT(1)
+#define ATMEL_XLCDC_LAYER_DISCEN		BIT(4)
+
+#define ATMEL_XLCDC_LAYER_SFACTC_A0_MULT_AS	(4 << 6)
+#define ATMEL_XLCDC_LAYER_SFACTA_ONE		BIT(9)
+#define ATMEL_XLCDC_LAYER_DFACTC_M_A0_MULT_AS	(6 << 11)
+#define ATMEL_XLCDC_LAYER_DFACTA_ONE		BIT(14)
+
+#define ATMEL_XLCDC_LAYER_A0_SHIFT		16
+#define ATMEL_XLCDC_LAYER_A0(x)			\
+	((x) << ATMEL_XLCDC_LAYER_A0_SHIFT)
+
+#define ATMEL_XLCDC_LAYER_VSCALER_LUMA_ENABLE		BIT(0)
+#define ATMEL_XLCDC_LAYER_VSCALER_CHROMA_ENABLE		BIT(1)
+#define ATMEL_XLCDC_LAYER_HSCALER_LUMA_ENABLE		BIT(4)
+#define ATMEL_XLCDC_LAYER_HSCALER_CHROMA_ENABLE		BIT(5)
+
+#define ATMEL_XLCDC_LAYER_VXSYCFG_ONE		BIT(0)
+#define ATMEL_XLCDC_LAYER_VXSYTAP2_ENABLE	BIT(4)
+#define ATMEL_XLCDC_LAYER_VXSCCFG_ONE		BIT(16)
+#define ATMEL_XLCDC_LAYER_VXSCTAP2_ENABLE	BIT(20)
+
+#define ATMEL_XLCDC_LAYER_HXSYCFG_ONE		BIT(0)
+#define ATMEL_XLCDC_LAYER_HXSYTAP2_ENABLE	BIT(4)
+#define ATMEL_XLCDC_LAYER_HXSCCFG_ONE		BIT(16)
+#define ATMEL_XLCDC_LAYER_HXSCTAP2_ENABLE	BIT(20)
+
 /**
  * Atmel HLCDC Layer registers layout structure
  *
@@ -156,6 +198,8 @@
  * @disc_pos: discard area position register
  * @disc_size: discard area size register
  * @csc: color space conversion register
+ * @vxs_config: vertical scalar filter taps control register
+ * @hxs_config: horizontal scalar filter taps control register
  */
 struct atmel_hlcdc_layer_cfg_layout {
 	int xstride[ATMEL_HLCDC_LAYER_MAX_PLANES];
@@ -175,6 +219,8 @@ struct atmel_hlcdc_layer_cfg_layout {
 	int disc_pos;
 	int disc_size;
 	int csc;
+	int vxs_config;
+	int hxs_config;
 };
 
 /**
@@ -289,6 +335,64 @@ atmel_hlcdc_layer_to_plane(struct atmel_hlcdc_layer *layer)
 }
 
 /**
+ * struct atmel_hlcdc_dc - Atmel HLCDC Display Controller.
+ * @desc: HLCDC Display Controller description
+ * @dscrpool: DMA coherent pool used to allocate DMA descriptors
+ * @hlcdc: pointer to the atmel_hlcdc structure provided by the MFD device
+ * @crtc: CRTC provided by the display controller
+ * @layers: active HLCDC layers
+ * @suspend: used to store the HLCDC state when entering suspend
+ * @suspend.imr: used to read/write LCDC Interrupt Mask Register
+ * @suspend.state: Atomic commit structure
+ */
+struct atmel_hlcdc_dc {
+	const struct atmel_hlcdc_dc_desc *desc;
+	struct dma_pool *dscrpool;
+	struct atmel_hlcdc *hlcdc;
+	struct drm_crtc *crtc;
+	struct atmel_hlcdc_layer *layers[ATMEL_HLCDC_MAX_LAYERS];
+	struct {
+		u32 imr;
+		struct drm_atomic_state *state;
+	} suspend;
+};
+
+struct atmel_hlcdc_plane_state;
+
+/**
+ * struct atmel_lcdc_dc_ops - describes atmel_lcdc ops group
+ * to differentiate HLCDC and XLCDC IP code support
+ * @plane_setup_scaler: update the vertical and horizontal scaling factors
+ * @update_lcdc_buffers: update the each LCDC layers DMA registers
+ * @lcdc_atomic_disable: disable LCDC interrupts and layers
+ * @lcdc_update_general_settings: update each LCDC layers general
+ * configuration register
+ * @lcdc_atomic_update: enable the LCDC layers and interrupts
+ * @lcdc_csc_init: update the color space conversion co-efficient of
+ * High-end overlay register
+ * @lcdc_irq_dbg: to raise alert incase of interrupt overrun in any LCDC layer
+ */
+struct atmel_lcdc_dc_ops {
+	void (*plane_setup_scaler)(struct atmel_hlcdc_plane *plane,
+				   struct atmel_hlcdc_plane_state *state);
+	void (*lcdc_update_buffers)(struct atmel_hlcdc_plane *plane,
+				    struct atmel_hlcdc_plane_state *state,
+				    u32 sr, int i);
+	void (*lcdc_atomic_disable)(struct atmel_hlcdc_plane *plane);
+	void (*lcdc_update_general_settings)(struct atmel_hlcdc_plane *plane,
+					     struct atmel_hlcdc_plane_state *state);
+	void (*lcdc_atomic_update)(struct atmel_hlcdc_plane *plane,
+				   struct atmel_hlcdc_dc *dc);
+	void (*lcdc_csc_init)(struct atmel_hlcdc_plane *plane,
+			      const struct atmel_hlcdc_layer_desc *desc);
+	void (*lcdc_irq_dbg)(struct atmel_hlcdc_plane *plane,
+			     const struct atmel_hlcdc_layer_desc *desc);
+};
+
+extern const struct atmel_lcdc_dc_ops atmel_hlcdc_ops;
+extern const struct atmel_lcdc_dc_ops atmel_xlcdc_ops;
+
+/**
  * Atmel HLCDC Display Controller description structure.
  *
  * This structure describes the HLCDC IP capabilities and depends on the
@@ -304,8 +408,10 @@ atmel_hlcdc_layer_to_plane(struct atmel_hlcdc_layer *layer)
  * @conflicting_output_formats: true if RGBXXX output formats conflict with
  *				each other.
  * @fixed_clksrc: true if clock source is fixed
+ * @is_xlcdc: true if XLCDC IP is supported
  * @layers: a layer description table describing available layers
  * @nlayers: layer description table size
+ * @ops: atmel lcdc dc ops
  */
 struct atmel_hlcdc_dc_desc {
 	int min_width;
@@ -317,32 +423,10 @@ struct atmel_hlcdc_dc_desc {
 	int max_hpw;
 	bool conflicting_output_formats;
 	bool fixed_clksrc;
+	bool is_xlcdc;
 	const struct atmel_hlcdc_layer_desc *layers;
 	int nlayers;
-};
-
-/**
- * Atmel HLCDC Display Controller.
- *
- * @desc: HLCDC Display Controller description
- * @dscrpool: DMA coherent pool used to allocate DMA descriptors
- * @hlcdc: pointer to the atmel_hlcdc structure provided by the MFD device
- * @fbdev: framebuffer device attached to the Display Controller
- * @crtc: CRTC provided by the display controller
- * @planes: instantiated planes
- * @layers: active HLCDC layers
- * @suspend: used to store the HLCDC state when entering suspend
- */
-struct atmel_hlcdc_dc {
-	const struct atmel_hlcdc_dc_desc *desc;
-	struct dma_pool *dscrpool;
-	struct atmel_hlcdc *hlcdc;
-	struct drm_crtc *crtc;
-	struct atmel_hlcdc_layer *layers[ATMEL_HLCDC_MAX_LAYERS];
-	struct {
-		u32 imr;
-		struct drm_atomic_state *state;
-	} suspend;
+	const struct atmel_lcdc_dc_ops *ops;
 };
 
 extern struct atmel_hlcdc_formats atmel_hlcdc_plane_rgb_formats;
diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c
index daa508504f47..4a7ba0918eca 100644
--- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c
+++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c
@@ -282,8 +282,9 @@ atmel_hlcdc_plane_scaler_set_phicoeff(struct atmel_hlcdc_plane *plane,
 					    coeff_tab[i]);
 }
 
-static void atmel_hlcdc_plane_setup_scaler(struct atmel_hlcdc_plane *plane,
-					   struct atmel_hlcdc_plane_state *state)
+static
+void atmel_hlcdc_plane_setup_scaler(struct atmel_hlcdc_plane *plane,
+				    struct atmel_hlcdc_plane_state *state)
 {
 	const struct atmel_hlcdc_layer_desc *desc = plane->layer.desc;
 	u32 xfactor, yfactor;
@@ -330,11 +331,61 @@ static void atmel_hlcdc_plane_setup_scaler(struct atmel_hlcdc_plane *plane,
 								     yfactor));
 }
 
+static
+void atmel_xlcdc_plane_setup_scaler(struct atmel_hlcdc_plane *plane,
+				    struct atmel_hlcdc_plane_state *state)
+{
+	const struct atmel_hlcdc_layer_desc *desc = plane->layer.desc;
+	u32 xfactor, yfactor;
+
+	if (!desc->layout.scaler_config)
+		return;
+
+	if (state->crtc_w == state->src_w && state->crtc_h == state->src_h) {
+		atmel_hlcdc_layer_write_cfg(&plane->layer,
+					    desc->layout.scaler_config, 0);
+		return;
+	}
+
+	/* xfactor = round[(2^20 * XMEMSIZE)/XSIZE)] */
+	xfactor = (u32)(((1 << 20) * state->src_w) / state->crtc_w);
+
+	/* yfactor = round[(2^20 * YMEMSIZE)/YSIZE)] */
+	yfactor = (u32)(((1 << 20) * state->src_h) / state->crtc_h);
+
+	atmel_hlcdc_layer_write_cfg(&plane->layer, desc->layout.scaler_config,
+				    ATMEL_XLCDC_LAYER_VSCALER_LUMA_ENABLE |
+				    ATMEL_XLCDC_LAYER_VSCALER_CHROMA_ENABLE |
+				    ATMEL_XLCDC_LAYER_HSCALER_LUMA_ENABLE |
+				    ATMEL_XLCDC_LAYER_HSCALER_CHROMA_ENABLE);
+
+	atmel_hlcdc_layer_write_cfg(&plane->layer, desc->layout.scaler_config + 1,
+				    yfactor);
+	atmel_hlcdc_layer_write_cfg(&plane->layer, desc->layout.scaler_config + 3,
+				    xfactor);
+
+	/*
+	 * With YCbCr 4:2:2 and YCbYcr 4:2:0 window resampling, configuration
+	 * register LCDC_HEOCFG25.VXSCFACT and LCDC_HEOCFG27.HXSCFACT is half
+	 * the value of yfactor and xfactor.
+	 */
+	if (state->base.fb->format->format == DRM_FORMAT_YUV420) {
+		yfactor /= 2;
+		xfactor /= 2;
+	}
+
+	atmel_hlcdc_layer_write_cfg(&plane->layer, desc->layout.scaler_config + 2,
+				    yfactor);
+	atmel_hlcdc_layer_write_cfg(&plane->layer, desc->layout.scaler_config + 4,
+				    xfactor);
+}
+
 static void
 atmel_hlcdc_plane_update_pos_and_size(struct atmel_hlcdc_plane *plane,
 				      struct atmel_hlcdc_plane_state *state)
 {
 	const struct atmel_hlcdc_layer_desc *desc = plane->layer.desc;
+	struct atmel_hlcdc_dc *dc = plane->base.dev->dev_private;
 
 	if (desc->layout.size)
 		atmel_hlcdc_layer_write_cfg(&plane->layer, desc->layout.size,
@@ -352,12 +403,12 @@ atmel_hlcdc_plane_update_pos_and_size(struct atmel_hlcdc_plane *plane,
 					ATMEL_HLCDC_LAYER_POS(state->crtc_x,
 							      state->crtc_y));
 
-	atmel_hlcdc_plane_setup_scaler(plane, state);
+	dc->desc->ops->plane_setup_scaler(plane, state);
 }
 
-static void
-atmel_hlcdc_plane_update_general_settings(struct atmel_hlcdc_plane *plane,
-					struct atmel_hlcdc_plane_state *state)
+static
+void atmel_hlcdc_plane_update_general_settings(struct atmel_hlcdc_plane *plane,
+					       struct atmel_hlcdc_plane_state *state)
 {
 	unsigned int cfg = ATMEL_HLCDC_LAYER_DMA_BLEN_INCR16 | state->ahb_id;
 	const struct atmel_hlcdc_layer_desc *desc = plane->layer.desc;
@@ -393,6 +444,40 @@ atmel_hlcdc_plane_update_general_settings(struct atmel_hlcdc_plane *plane,
 				    cfg);
 }
 
+static
+void atmel_xlcdc_plane_update_general_settings(struct atmel_hlcdc_plane *plane,
+					       struct atmel_hlcdc_plane_state *state)
+{
+	const struct atmel_hlcdc_layer_desc *desc = plane->layer.desc;
+	const struct drm_format_info *format = state->base.fb->format;
+	unsigned int cfg;
+
+	atmel_hlcdc_layer_write_cfg(&plane->layer, ATMEL_XLCDC_LAYER_DMA_CFG,
+				    ATMEL_HLCDC_LAYER_DMA_BLEN_INCR16 | state->ahb_id);
+
+	cfg = ATMEL_XLCDC_LAYER_DMA | ATMEL_XLCDC_LAYER_REP;
+
+	if (plane->base.type != DRM_PLANE_TYPE_PRIMARY) {
+		/*
+		 * Alpha Blending bits specific to SAM9X7 SoC
+		 */
+		cfg |= ATMEL_XLCDC_LAYER_SFACTC_A0_MULT_AS |
+		       ATMEL_XLCDC_LAYER_SFACTA_ONE |
+		       ATMEL_XLCDC_LAYER_DFACTC_M_A0_MULT_AS |
+		       ATMEL_XLCDC_LAYER_DFACTA_ONE;
+		if (format->has_alpha)