diff --git a/Documentation/devicetree/bindings/display/msm/dp-controller.yaml b/Documentation/devicetree/bindings/display/msm/dp-controller.yaml
index ae53cbfb21932..0045423594b62 100644
--- a/Documentation/devicetree/bindings/display/msm/dp-controller.yaml
+++ b/Documentation/devicetree/bindings/display/msm/dp-controller.yaml
@@ -102,6 +102,17 @@ properties:
   "#sound-dai-cells":
     const: 0
 
+  radxa,display-controller-index:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: Index of the display controller used by board audio firmware.
+    maximum: 1
+
+  radxa,force-audio:
+    type: boolean
+    description:
+      Forces audio support for a DP-to-HDMI bridge whose fixed EDID omits the
+      CTA audio data block.
+
   vdda-0p9-supply:
     deprecated: true
   vdda-1p2-supply:
diff --git a/Documentation/devicetree/bindings/sound/qcom,sm8250.yaml b/Documentation/devicetree/bindings/sound/qcom,sm8250.yaml
index 6f419747273e3..8db00a38d3579 100644
--- a/Documentation/devicetree/bindings/sound/qcom,sm8250.yaml
+++ b/Documentation/devicetree/bindings/sound/qcom,sm8250.yaml
@@ -27,9 +27,12 @@ properties:
               - qcom,sm8650-sndcard
           - const: qcom,sm8450-sndcard
       - enum:
+          - radxa,vmarc-q9075-sndcard
           - qcom,apq8016-sbc-sndcard
           - qcom,msm8916-qdsp6-sndcard
           - qcom,qrb5165-rb5-sndcard
+          - qcom,qcs9075-sndcard
+          - qcom,qcs9100-sndcard
           - qcom,sc7180-qdsp6-sndcard
           - qcom,sc8280xp-sndcard
           - qcom,sdm845-sndcard
diff --git a/arch/arm64/boot/dts/qcom/qcs9075-radxa-vmarc-q9075.dtsi b/arch/arm64/boot/dts/qcom/qcs9075-radxa-vmarc-q9075.dtsi
index 628be2d2f1943..45b45cafd3d96 100644
--- a/arch/arm64/boot/dts/qcom/qcs9075-radxa-vmarc-q9075.dtsi
+++ b/arch/arm64/boot/dts/qcom/qcs9075-radxa-vmarc-q9075.dtsi
@@ -83,6 +83,27 @@
 		stdout-path = "serial0:115200n8";
 	};
 
+	sound {
+		compatible = "radxa,vmarc-q9075-sndcard";
+		model = "VMARC-Q9075-DP";
+
+		dp0-dai-link {
+			link-name = "DISPLAY_PORT-RX";
+
+			cpu {
+				sound-dai = <&q6apmbedai DISPLAY_PORT_RX_0>;
+			};
+
+			codec {
+				sound-dai = <&mdss0_dp0>;
+			};
+
+			platform {
+				sound-dai = <&q6apm>;
+			};
+		};
+	};
+
 	vcc_5v0_regulator: vcc-5v0-regulator {
 		compatible = "regulator-fixed";
 		regulator-name = "vcc_5v0";
@@ -692,9 +713,15 @@
 };
 
 &mdss0_dp0 {
+	radxa,display-controller-index = <0>;
+	radxa,force-audio;
 	status = "okay";
 };
 
+&mdss1_dp0 {
+	radxa,display-controller-index = <1>;
+};
+
 &mdss0_dp0_out {
 	data-lanes = <0 1 2 3>;
 	link-frequencies = /bits/ 64 <1620000000 2700000000 5400000000 8100000000>;
diff --git a/arch/arm64/configs/qcom_addons.config b/arch/arm64/configs/qcom_addons.config
index 231d62b4effc6..8115c3140120c 100644
--- a/arch/arm64/configs/qcom_addons.config
+++ b/arch/arm64/configs/qcom_addons.config
@@ -55,4 +55,4 @@ CONFIG_VIRT_DRIVERS=y
 CONFIG_SENSORS_EMC2305=y
 CONFIG_HWMON=y
 CONFIG_SND_SOC_QCS9100=m
-
+CONFIG_SND_SOC_SC8280XP=m
diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
index bb050b5e03078..d79d0f3a0133c 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.c
+++ b/drivers/gpu/drm/msm/dp/dp_display.c
@@ -497,7 +497,9 @@ static int msm_dp_display_process_hpd_high(struct msm_dp_display_private *dp)
 
 	dp->msm_dp_display.psr_supported = dp->panel->psr_cap.version && psr_enabled;
 
-	dp->audio_supported = info->has_audio;
+	dp->audio_supported = info->has_audio ||
+		of_property_read_bool(dp->msm_dp_display.pdev->dev.of_node,
+				      "radxa,force-audio");
 	msm_dp_panel_handle_sink_request(dp->panel);
 
 	/*
diff --git a/drivers/misc/fastrpc.c b/drivers/misc/fastrpc.c
index 8bda3e503b68f..0a24a0763486b 100644
--- a/drivers/misc/fastrpc.c
+++ b/drivers/misc/fastrpc.c
@@ -1616,7 +1616,9 @@ static int fastrpc_mmap_remove_pdr(struct fastrpc_user *fl)
 	if (session < 0)
 		return -EUSERS;
 
-	if (atomic_read(&fl->cctx->spd[session].ispdup) == 0)
+	/* The service cannot be up before its initial static PD is created. */
+	if (fl->cctx->spd[session].pdrcount &&
+	    atomic_read(&fl->cctx->spd[session].ispdup) == 0)
 		return -ENOTCONN;
 
 	if (fl->cctx->spd[session].pdrcount !=
diff --git a/sound/soc/qcom/qdsp6/audioreach.c b/sound/soc/qcom/qdsp6/audioreach.c
index 7922a6cea0e57..741cb6173b88a 100644
--- a/sound/soc/qcom/qdsp6/audioreach.c
+++ b/sound/soc/qcom/qdsp6/audioreach.c
@@ -203,6 +203,13 @@ struct apm_display_port_module_intf_cfg {
 } __packed;
 #define APM_DP_INTF_CFG_PSIZE ALIGN(sizeof(struct apm_display_port_module_intf_cfg), 8)
 
+struct apm_vmarc_display_ctrl_cfg {
+	struct apm_module_param_data param_data;
+	struct param_id_vmarc_display_ctrl_cfg cfg;
+} __packed;
+
+#define APM_VMARC_DISPLAY_CTRL_CFG_PSIZE ALIGN(sizeof(struct apm_vmarc_display_ctrl_cfg), 8)
+
 static void *__audioreach_alloc_pkt(int payload_size, uint32_t opcode, uint32_t token,
 				    uint32_t src_port, uint32_t dest_port, bool has_cmd_hdr)
 {
@@ -611,10 +618,11 @@ static int audioreach_display_port_set_media_format(struct q6apm_graph *graph,
 						    struct audioreach_module_config *cfg)
 {
 	struct apm_display_port_module_intf_cfg *intf_cfg;
+	struct apm_vmarc_display_ctrl_cfg *ctrl_cfg;
 	struct apm_module_frame_size_factor_cfg *fs_cfg;
 	struct apm_module_param_data *param_data;
 	struct apm_module_hw_ep_mf_cfg *hw_cfg;
-	int ic_sz, ep_sz, fs_sz, dl_sz;
+	int ic_sz, ep_sz, fs_sz, ctrl_sz, dl_sz;
 	int rc, payload_size;
 	struct gpr_pkt *pkt;
 	void *p;
@@ -622,9 +630,10 @@ static int audioreach_display_port_set_media_format(struct q6apm_graph *graph,
 	ic_sz = APM_DP_INTF_CFG_PSIZE;
 	ep_sz = APM_HW_EP_CFG_PSIZE;
 	fs_sz = APM_FS_CFG_PSIZE;
+	ctrl_sz = cfg->has_display_ctrl_idx ? APM_VMARC_DISPLAY_CTRL_CFG_PSIZE : 0;
 	dl_sz = 0;
 
-	payload_size = ic_sz + ep_sz + fs_sz + dl_sz;
+	payload_size = ic_sz + ep_sz + fs_sz + ctrl_sz + dl_sz;
 
 	pkt = audioreach_alloc_apm_cmd_pkt(payload_size, APM_CMD_SET_CFG, 0);
 	if (IS_ERR(pkt))
@@ -654,6 +663,17 @@ static int audioreach_display_port_set_media_format(struct q6apm_graph *graph,
 	fs_cfg->frame_size_factor = 1;
 	p += fs_sz;
 
+	if (cfg->has_display_ctrl_idx) {
+		ctrl_cfg = p;
+		param_data = &ctrl_cfg->param_data;
+		param_data->module_instance_id = module->instance_id;
+		param_data->error_code = 0;
+		param_data->param_id = PARAM_ID_VMARC_DISPLAY_CTRL_CFG;
+		param_data->param_size = ctrl_sz - APM_MODULE_PARAM_DATA_SIZE;
+		ctrl_cfg->cfg.display_ctrl_idx = cfg->display_ctrl_idx;
+		p += ctrl_sz;
+	}
+
 	intf_cfg = p;
 	param_data = &intf_cfg->param_data;
 	param_data->module_instance_id = module->instance_id;
diff --git a/sound/soc/qcom/qdsp6/audioreach.h b/sound/soc/qcom/qdsp6/audioreach.h
index 2c82917b71621..6fbb26ce731ec 100644
--- a/sound/soc/qcom/qdsp6/audioreach.h
+++ b/sound/soc/qcom/qdsp6/audioreach.h
@@ -483,6 +483,12 @@ struct param_id_display_port_intf_cfg {
 	uint32_t dptx_idx;
 } __packed;
 
+#define PARAM_ID_VMARC_DISPLAY_CTRL_CFG		0x0800F001
+
+struct param_id_vmarc_display_ctrl_cfg {
+	u32 display_ctrl_idx;
+} __packed;
+
 #define PARAM_ID_HW_EP_MF_CFG			0x08001017
 struct param_id_hw_ep_mf {
 	uint32_t sample_rate;
@@ -757,6 +763,8 @@ struct audioreach_module_config {
 	u16	num_channels;
 	u16	active_channels_mask;
 	u16	dp_idx;
+	u8	display_ctrl_idx;
+	bool	has_display_ctrl_idx;
 	u32	channel_allocation;
 	u32	sd_line_mask;
 	int	fmt;
diff --git a/sound/soc/qcom/qdsp6/q6apm-lpass-dais.c b/sound/soc/qcom/qdsp6/q6apm-lpass-dais.c
index 9f51bf2882ae7..81622e2cd7c41 100644
--- a/sound/soc/qcom/qdsp6/q6apm-lpass-dais.c
+++ b/sound/soc/qcom/qdsp6/q6apm-lpass-dais.c
@@ -109,11 +109,47 @@ static int q6dma_set_channel_map(struct snd_soc_dai *dai,
 	return 0;
 }
 
+/*
+ * Resolve the codec device node of a DAI link from the sound card's DT node.
+ * The DAI link component's of_node is not populated for links parsed by
+ * snd_soc_of_get_dai_link_codecs(), so walk the "link-name" matching child and
+ * dereference its "codec"/"sound-dai" phandle instead.
+ */
+static struct device_node *q6hdmi_codec_of_node(struct snd_soc_pcm_runtime *rtd)
+{
+	struct device_node *sound_np = rtd->card->dev->of_node;
+	struct device_node *link_np, *codec_np, *codec_of = NULL;
+	const char *link_name;
+
+	if (!sound_np || !rtd->dai_link->name)
+		return NULL;
+
+	for_each_child_of_node(sound_np, link_np) {
+		if (of_property_read_string(link_np, "link-name", &link_name))
+			continue;
+		if (strcmp(link_name, rtd->dai_link->name))
+			continue;
+
+		codec_np = of_get_child_by_name(link_np, "codec");
+		if (codec_np) {
+			codec_of = of_parse_phandle(codec_np, "sound-dai", 0);
+			of_node_put(codec_np);
+		}
+		of_node_put(link_np);
+		break;
+	}
+
+	return codec_of;
+}
+
 static int q6hdmi_hw_params(struct snd_pcm_substream *substream,
 			    struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
 {
 	struct q6apm_lpass_dai_data *dai_data = dev_get_drvdata(dai->dev);
 	struct audioreach_module_config *cfg = &dai_data->module_config[dai->id];
+	struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
+	struct device_node *dp_np = q6hdmi_codec_of_node(rtd);
+	u32 display_ctrl_idx;
 	int channels = hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_CHANNELS)->max;
 	int ret;
 
@@ -130,6 +166,18 @@ static int q6hdmi_hw_params(struct snd_pcm_substream *substream,
 		break;
 	}
 
+	cfg->has_display_ctrl_idx = false;
+	if (dp_np &&
+	    !of_property_read_u32(dp_np, "radxa,display-controller-index", &display_ctrl_idx)) {
+		if (display_ctrl_idx > 1) {
+			of_node_put(dp_np);
+			return -EINVAL;
+		}
+		cfg->display_ctrl_idx = display_ctrl_idx;
+		cfg->has_display_ctrl_idx = true;
+	}
+	of_node_put(dp_np);
+
 	ret = q6dsp_get_channel_allocation(channels);
 	if (ret < 0)
 		return ret;
diff --git a/sound/soc/qcom/sc8280xp.c b/sound/soc/qcom/sc8280xp.c
index 4532c4b75ce41..abb6aa1334025 100644
--- a/sound/soc/qcom/sc8280xp.c
+++ b/sound/soc/qcom/sc8280xp.c
@@ -46,6 +46,10 @@ static struct snd_soc_dapm_widget qcs9100_dapm_widgets[] = {
 	SND_SOC_DAPM_SPK("DP0 Jack", NULL),
 };
 
+static const struct snd_soc_dapm_widget vmarc_q9075_dapm_widgets[] = {
+	SND_SOC_DAPM_SPK("DP0 Jack", NULL),
+};
+
 static const struct snd_soc_dapm_route qcs9100_dapm_routes[] = {
 	{"Speaker", NULL, "MI2S_PINCTRL"},
 	{"DMic", NULL, "MI2S_PINCTRL"},
@@ -70,6 +74,12 @@ static struct snd_soc_common qcs9100_priv_data = {
 	.num_dapm_routes = ARRAY_SIZE(qcs9100_dapm_routes),
 };
 
+static const struct snd_soc_common vmarc_q9075_priv_data = {
+	.driver_name = "sa8775p",
+	.dapm_widgets = vmarc_q9075_dapm_widgets,
+	.num_dapm_widgets = ARRAY_SIZE(vmarc_q9075_dapm_widgets),
+};
+
 static struct snd_soc_common lemans_amr_priv_data = {
        .driver_name = "sa8775p",
        .dapm_widgets = sc8280xp_dapm_widgets,
@@ -341,6 +351,7 @@ static int sc8280xp_platform_probe(struct platform_device *pdev)
 }
 
 static const struct of_device_id snd_sc8280xp_dt_match[] = {
+	{.compatible = "radxa,vmarc-q9075-sndcard", .data = &vmarc_q9075_priv_data},
 	{.compatible = "qcom,qcm6490-idp-sndcard", .data = &qcm6490_priv_data},
 	{.compatible = "qcom,qcs615-sndcard", .data = &qcs615_priv_data},
 	{.compatible = "qcom,qcs6490-rb3gen2-sndcard", .data = &qcs6490_priv_data},