diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 5045c34a16be..6e9180ce069a 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -95,7 +95,6 @@
 #define INTEL_DP_RESOLUTION_STANDARD	(2 << INTEL_DP_RESOLUTION_SHIFT_MASK)
 #define INTEL_DP_RESOLUTION_FAILSAFE	(3 << INTEL_DP_RESOLUTION_SHIFT_MASK)
 
-
 /* Constants for DP DSC configurations */
 static const u8 valid_dsc_bpp[] = {6, 8, 10, 12, 15};
 
@@ -4087,6 +4086,34 @@ intel_dp_needs_vsc_sdp(const struct intel_crtc_state *crtc_state,
 	return false;
 }
 
+static ssize_t intel_dp_as_sdp_pack(const struct drm_dp_as_sdp *as_sdp,
+				    struct dp_sdp *sdp, size_t size)
+{
+	size_t length = sizeof(struct dp_sdp);
+
+	if (size < length)
+		return -ENOSPC;
+
+	memset(sdp, 0, size);
+
+	/* Prepare AS (Adaptive Sync) SDP Header */
+	sdp->sdp_header.HB0 = 0;
+	sdp->sdp_header.HB1 = as_sdp->sdp_type;
+	sdp->sdp_header.HB2 = 0x02;
+	sdp->sdp_header.HB3 = as_sdp->length;
+
+	/* Fill AS (Adaptive Sync) SDP Payload */
+	sdp->db[1] = 0x0;
+	sdp->db[1] = as_sdp->vtotal & 0xFF;
+	sdp->db[2] = (as_sdp->vtotal >> 8) & 0xF;
+	sdp->db[3] = 0x0;
+	sdp->db[4] = 0x0;
+	sdp->db[7] = 0x0;
+	sdp->db[8] = 0x0;
+
+	return length;
+}
+
 static ssize_t intel_dp_vsc_sdp_pack(const struct drm_dp_vsc_sdp *vsc,
 				     struct dp_sdp *sdp, size_t size)
 {
@@ -4254,6 +4281,10 @@ static void intel_write_dp_sdp(struct intel_encoder *encoder,
 							       &crtc_state->infoframes.drm.drm,
 							       &sdp, sizeof(sdp));
 		break;
+	case DP_SDP_ADAPTIVE_SYNC:
+		len = intel_dp_as_sdp_pack(&crtc_state->infoframes.as_sdp, &sdp,
+					   sizeof(sdp));
+		break;
 	default:
 		MISSING_CASE(type);
 		return;
@@ -4274,7 +4305,8 @@ void intel_dp_set_infoframes(struct intel_encoder *encoder,
 	i915_reg_t reg = HSW_TVIDEO_DIP_CTL(crtc_state->cpu_transcoder);
 	u32 dip_enable = VIDEO_DIP_ENABLE_AVI_HSW | VIDEO_DIP_ENABLE_GCP_HSW |
 			 VIDEO_DIP_ENABLE_VS_HSW | VIDEO_DIP_ENABLE_GMP_HSW |
-			 VIDEO_DIP_ENABLE_SPD_HSW | VIDEO_DIP_ENABLE_DRM_GLK;
+			 VIDEO_DIP_ENABLE_SPD_HSW | VIDEO_DIP_ENABLE_DRM_GLK |
+			 VIDEO_DIP_ENABLE_AS_HSW;
 	u32 val = intel_de_read(dev_priv, reg) & ~dip_enable;
 
 	/* TODO: Sanitize DSC enabling wrt. intel_dsc_dp_pps_write(). */
@@ -4296,6 +4328,40 @@ void intel_dp_set_infoframes(struct intel_encoder *encoder,
 	intel_write_dp_sdp(encoder, crtc_state, HDMI_PACKET_TYPE_GAMUT_METADATA);
 }
 
+static
+int intel_dp_as_sdp_unpack(struct drm_dp_as_sdp *as_sdp,
+			   const void *buffer, size_t size)
+{
+	const struct dp_sdp *sdp = buffer;
+
+	if (size < sizeof(struct dp_sdp))
+		return -EINVAL;
+
+	memset(as_sdp, 0, sizeof(*as_sdp));
+
+	if (sdp->sdp_header.HB0 != 0)
+		return -EINVAL;
+
+	if (sdp->sdp_header.HB1 != DP_SDP_ADAPTIVE_SYNC)
+		return -EINVAL;
+
+	if (sdp->sdp_header.HB2 != 0x02)
+		return -EINVAL;
+
+	if ((sdp->sdp_header.HB3 & 0x3F) != 9)
+		return -EINVAL;
+
+	if ((sdp->db[0] & AS_SDP_OP_MODE) != 0x0)
+		return -EINVAL;
+
+	as_sdp->vtotal = ((u64)sdp->db[2] << 32) | (u64)sdp->db[1];
+	as_sdp->target_rr = 0;
+	as_sdp->duration_incr_ms = 0;
+	as_sdp->duration_decr_ms = 0;
+
+	return 0;
+}
+
 static int intel_dp_vsc_sdp_unpack(struct drm_dp_vsc_sdp *vsc,
 				   const void *buffer, size_t size)
 {
@@ -4366,6 +4432,27 @@ static int intel_dp_vsc_sdp_unpack(struct drm_dp_vsc_sdp *vsc,
 	return 0;
 }
 
+static int
+intel_read_dp_metadata_infoframe_as_sdp(struct intel_encoder *encoder,
+					struct intel_crtc_state *crtc_state,
+					struct drm_dp_as_sdp *as_sdp)
+{
+	struct intel_digital_port *dig_port = enc_to_dig_port(encoder);
+	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+	unsigned int type = DP_SDP_ADAPTIVE_SYNC;
+	struct dp_sdp sdp = {};
+	int ret;
+
+	dig_port->read_infoframe(encoder, crtc_state, type, &sdp,
+				 sizeof(sdp));
+
+	ret = intel_dp_as_sdp_unpack(as_sdp, &sdp, sizeof(sdp));
+	if (ret)
+		drm_dbg_kms(&dev_priv->drm, "Failed to unpack DP AS SDP\n");
+
+	return ret;
+}
+
 static int
 intel_dp_hdr_metadata_infoframe_sdp_unpack(struct hdmi_drm_infoframe *drm_infoframe,
 					   const void *buffer, size_t size)
@@ -4472,6 +4559,10 @@ void intel_read_dp_sdp(struct intel_encoder *encoder,
 		intel_read_dp_hdr_metadata_infoframe_sdp(encoder, crtc_state,
 							 &crtc_state->infoframes.drm.drm);
 		break;
+	case DP_SDP_ADAPTIVE_SYNC:
+		intel_read_dp_metadata_infoframe_as_sdp(encoder, crtc_state,
+							&crtc_state->infoframes.as_sdp);
+		break;
 	default:
 		MISSING_CASE(type);
 		break;
diff --git a/drivers/gpu/drm/i915/display/intel_hdmi.c b/drivers/gpu/drm/i915/display/intel_hdmi.c
index 7020e5806109..04c975d18e94 100644
--- a/drivers/gpu/drm/i915/display/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/display/intel_hdmi.c
@@ -137,6 +137,8 @@ static u32 hsw_infoframe_enable(unsigned int type)
 		return VIDEO_DIP_ENABLE_GMP_HSW;
 	case DP_SDP_VSC:
 		return VIDEO_DIP_ENABLE_VSC_HSW;
+	case DP_SDP_ADAPTIVE_SYNC:
+		return VIDEO_DIP_ENABLE_AS_HSW;
 	case DP_SDP_PPS:
 		return VDIP_ENABLE_PPS;
 	case HDMI_INFOFRAME_TYPE_AVI:
@@ -164,6 +166,8 @@ hsw_dip_data_reg(struct drm_i915_private *dev_priv,
 		return HSW_TVIDEO_DIP_GMP_DATA(cpu_transcoder, i);
 	case DP_SDP_VSC:
 		return HSW_TVIDEO_DIP_VSC_DATA(cpu_transcoder, i);
+	case DP_SDP_ADAPTIVE_SYNC:
+		return HSW_TVIDEO_DIP_AS_SDP_DATA(cpu_transcoder, i);
 	case DP_SDP_PPS:
 		return ICL_VIDEO_DIP_PPS_DATA(cpu_transcoder, i);
 	case HDMI_INFOFRAME_TYPE_AVI:
@@ -186,6 +190,8 @@ static int hsw_dip_data_size(struct drm_i915_private *dev_priv,
 	switch (type) {
 	case DP_SDP_VSC:
 		return VIDEO_DIP_VSC_DATA_SIZE;
+	case DP_SDP_ADAPTIVE_SYNC:
+		return VIDEO_DIP_ASYNC_DATA_SIZE;
 	case DP_SDP_PPS:
 		return VIDEO_DIP_PPS_DATA_SIZE;
 	case HDMI_PACKET_TYPE_GAMUT_METADATA:
@@ -558,7 +564,8 @@ static u32 hsw_infoframes_enabled(struct intel_encoder *encoder,
 
 	mask = (VIDEO_DIP_ENABLE_VSC_HSW | VIDEO_DIP_ENABLE_AVI_HSW |
 		VIDEO_DIP_ENABLE_GCP_HSW | VIDEO_DIP_ENABLE_VS_HSW |
-		VIDEO_DIP_ENABLE_GMP_HSW | VIDEO_DIP_ENABLE_SPD_HSW);
+		VIDEO_DIP_ENABLE_GMP_HSW | VIDEO_DIP_ENABLE_SPD_HSW |
+		VIDEO_DIP_ENABLE_AS_HSW);
 
 	if (DISPLAY_VER(dev_priv) >= 10)
 		mask |= VIDEO_DIP_ENABLE_DRM_GLK;
@@ -570,6 +577,7 @@ static const u8 infoframe_type_to_idx[] = {
 	HDMI_PACKET_TYPE_GENERAL_CONTROL,
 	HDMI_PACKET_TYPE_GAMUT_METADATA,
 	DP_SDP_VSC,
+	DP_SDP_ADAPTIVE_SYNC,
 	HDMI_INFOFRAME_TYPE_AVI,
 	HDMI_INFOFRAME_TYPE_SPD,
 	HDMI_INFOFRAME_TYPE_VENDOR,
@@ -1212,7 +1220,7 @@ static void hsw_set_infoframes(struct intel_encoder *encoder,
 	val &= ~(VIDEO_DIP_ENABLE_VSC_HSW | VIDEO_DIP_ENABLE_AVI_HSW |
 		 VIDEO_DIP_ENABLE_GCP_HSW | VIDEO_DIP_ENABLE_VS_HSW |
 		 VIDEO_DIP_ENABLE_GMP_HSW | VIDEO_DIP_ENABLE_SPD_HSW |
-		 VIDEO_DIP_ENABLE_DRM_GLK);
+		 VIDEO_DIP_ENABLE_DRM_GLK | VIDEO_DIP_ENABLE_AS_HSW);
 
 	if (!enable) {
 		intel_de_write(dev_priv, reg, val);
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 3449e65fdf1b..3bcbddd676b9 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -2314,6 +2314,7 @@
  * (Haswell and newer) to see which VIDEO_DIP_DATA byte corresponds to each byte
  * of the infoframe structure specified by CEA-861. */
 #define   VIDEO_DIP_DATA_SIZE	32
+#define   VIDEO_DIP_ASYNC_DATA_SIZE	36
 #define   VIDEO_DIP_GMP_DATA_SIZE	36
 #define   VIDEO_DIP_VSC_DATA_SIZE	36
 #define   VIDEO_DIP_PPS_DATA_SIZE	132
@@ -2346,6 +2347,7 @@
 #define   VSC_DIP_HW_DATA_SW_HEA	(2 << 25)
 #define   VSC_DIP_SW_HEA_DATA		(3 << 25)
 #define   VDIP_ENABLE_PPS		(1 << 24)
+#define   VIDEO_DIP_ENABLE_AS_HSW	REG_BIT(23)
 #define   VIDEO_DIP_ENABLE_VSC_HSW	(1 << 20)
 #define   VIDEO_DIP_ENABLE_GCP_HSW	(1 << 16)
 #define   VIDEO_DIP_ENABLE_AVI_HSW	(1 << 12)
@@ -5042,6 +5044,7 @@
 #define _HSW_VIDEO_DIP_SPD_DATA_A	0x602A0
 #define _HSW_VIDEO_DIP_GMP_DATA_A	0x602E0
 #define _HSW_VIDEO_DIP_VSC_DATA_A	0x60320
+#define	_HSW_VIDEO_DIP_ASYNC_DATA_A	0x60484
 #define _GLK_VIDEO_DIP_DRM_DATA_A	0x60440
 #define _HSW_VIDEO_DIP_AVI_ECC_A	0x60240
 #define _HSW_VIDEO_DIP_VS_ECC_A		0x60280
@@ -5056,6 +5059,7 @@
 #define _HSW_VIDEO_DIP_SPD_DATA_B	0x612A0
 #define _HSW_VIDEO_DIP_GMP_DATA_B	0x612E0
 #define _HSW_VIDEO_DIP_VSC_DATA_B	0x61320
+#define	_HSW_VIDEO_DIP_ASYNC_DATA_B	0x61484
 #define _GLK_VIDEO_DIP_DRM_DATA_B	0x61440
 #define _HSW_VIDEO_DIP_BVI_ECC_B	0x61240
 #define _HSW_VIDEO_DIP_VS_ECC_B		0x61280
@@ -5082,6 +5086,8 @@
 #define HSW_TVIDEO_DIP_SPD_DATA(trans, i)	_MMIO_TRANS2(trans, _HSW_VIDEO_DIP_SPD_DATA_A + (i) * 4)
 #define HSW_TVIDEO_DIP_GMP_DATA(trans, i)	_MMIO_TRANS2(trans, _HSW_VIDEO_DIP_GMP_DATA_A + (i) * 4)
 #define HSW_TVIDEO_DIP_VSC_DATA(trans, i)	_MMIO_TRANS2(trans, _HSW_VIDEO_DIP_VSC_DATA_A + (i) * 4)
+#define HSW_TVIDEO_DIP_AS_SDP_DATA(trans, i)	_MMIO_TRANS2(trans,\
+							     _HSW_VIDEO_DIP_ASYNC_DATA_A + (i) * 4)
 #define GLK_TVIDEO_DIP_DRM_DATA(trans, i)	_MMIO_TRANS2(trans, _GLK_VIDEO_DIP_DRM_DATA_A + (i) * 4)
 #define ICL_VIDEO_DIP_PPS_DATA(trans, i)	_MMIO_TRANS2(trans, _ICL_VIDEO_DIP_PPS_DATA_A + (i) * 4)
 #define ICL_VIDEO_DIP_PPS_ECC(trans, i)		_MMIO_TRANS2(trans, _ICL_VIDEO_DIP_PPS_ECC_A + (i) * 4)
diff --git a/include/drm/display/drm_dp_helper.h b/include/drm/display/drm_dp_helper.h
index 37045a903d89..67feb626405b 100644
--- a/include/drm/display/drm_dp_helper.h
+++ b/include/drm/display/drm_dp_helper.h
@@ -837,6 +837,9 @@ int drm_dp_pcon_convert_rgb_to_ycbcr(struct drm_dp_aux *aux, u8 color_spc);
 #define DRM_DP_BW_OVERHEAD_FEC		BIT(3)
 #define DRM_DP_BW_OVERHEAD_DSC		BIT(4)
 
+#define AS_SDP_ENABLE				BIT(2)
+#define AS_SDP_OP_MODE				GENMASK(1, 0)
+
 int drm_dp_bw_overhead(int lane_count, int hactive,
 		       int dsc_slice_count,
 		       int bpp_x16, unsigned long flags);
