diff --git a/build_brunch.sh b/build_brunch.sh
index 4ed4f9ab8e..56639693fd 100755
--- a/build_brunch.sh
+++ b/build_brunch.sh
@@ -32,7 +32,7 @@ if [ ! -z $1 ] && [ "$1" != "skip" ] ; then
 else
 	git clone -b master https://github.com/sebanc/chromeos-ota-extract.git rootfs || { echo "Failed to clone chromeos-ota-extract"; exit 1; }
 	cd rootfs
-	curl -L https://dl.google.com/chromeos/rammus/15604.57.0/stable-channel/chromeos_15604.57.0_rammus_stable-channel_full_mp-v3.bin-gy2tgyrvgyydbr3dkz5iqxodi6tym6w7.signed -o ./update.signed || { echo "Failed to Download the OTA update"; exit 1; }
+	curl -L https://dl.google.com/chromeos/rammus/15633.65.0/stable-channel/chromeos_15633.65.0_rammus_stable-channel_full_mp-v3.bin-gy2tmzbxmy3ts65sgw6pixqqcmkmxsz4.signed -o ./update.signed || { echo "Failed to Download the OTA update"; exit 1; }
 	python3 extract_android_ota_payload.py ./update.signed || { echo "Failed to extract the OTA update"; exit 1; }
 	cd ..
 	[ -f ./rootfs/root.img ] || { echo "ChromeOS rootfs has not been extracted"; exit 1; }
diff --git a/kernel-patches/5.15/base/base.patch b/kernel-patches/5.15/base/base.patch
index 9519eb4f78..6619e39161 100644
--- a/kernel-patches/5.15/base/base.patch
+++ b/kernel-patches/5.15/base/base.patch
@@ -51832,210 +51832,6 @@ diff -ruN a/drivers/regulator/core.c b/drivers/regulator/core.c
  			return current_uV;
  		}
  
-diff -ruN a/drivers/rpmsg/mtk_rpmsg.c b/drivers/rpmsg/mtk_rpmsg.c
---- a/drivers/rpmsg/mtk_rpmsg.c	2021-12-08 09:04:57.000000000 +0100
-+++ b/drivers/rpmsg/mtk_rpmsg.c	2021-12-23 08:35:44.000000000 +0100
-@@ -183,7 +183,7 @@
- 	int ret;
- 
- 	for_each_available_child_of_node(node, child) {
--		ret = of_property_read_string(child, "mtk,rpmsg-name", &name);
-+		ret = of_property_read_string(child, "mediatek,rpmsg-name", &name);
- 		if (ret)
- 			continue;
- 
-diff -ruN a/drivers/rpmsg/qcom_glink_native.c b/drivers/rpmsg/qcom_glink_native.c
---- a/drivers/rpmsg/qcom_glink_native.c	2021-12-08 09:04:57.000000000 +0100
-+++ b/drivers/rpmsg/qcom_glink_native.c	2021-12-23 08:35:44.000000000 +0100
-@@ -92,6 +92,8 @@
-  * @rcids:	idr of all channels with a known remote channel id
-  * @features:	remote features
-  * @intentless:	flag to indicate that there is no intent
-+ * @tx_avail_notify: Waitqueue for pending tx tasks
-+ * @sent_read_notify: flag to check cmd sent or not
-  */
- struct qcom_glink {
- 	struct device *dev;
-@@ -118,6 +120,8 @@
- 	unsigned long features;
- 
- 	bool intentless;
-+	wait_queue_head_t tx_avail_notify;
-+	bool sent_read_notify;
- };
- 
- enum {
-@@ -301,6 +305,20 @@
- 	glink->tx_pipe->write(glink->tx_pipe, hdr, hlen, data, dlen);
- }
- 
-+static void qcom_glink_send_read_notify(struct qcom_glink *glink)
-+{
-+	struct glink_msg msg;
-+
-+	msg.cmd = cpu_to_le16(RPM_CMD_READ_NOTIF);
-+	msg.param1 = 0;
-+	msg.param2 = 0;
-+
-+	qcom_glink_tx_write(glink, &msg, sizeof(msg), NULL, 0);
-+
-+	mbox_send_message(glink->mbox_chan, NULL);
-+	mbox_client_txdone(glink->mbox_chan, 0);
-+}
-+
- static int qcom_glink_tx(struct qcom_glink *glink,
- 			 const void *hdr, size_t hlen,
- 			 const void *data, size_t dlen, bool wait)
-@@ -321,12 +339,21 @@
- 			goto out;
- 		}
- 
-+		if (!glink->sent_read_notify) {
-+			glink->sent_read_notify = true;
-+			qcom_glink_send_read_notify(glink);
-+		}
-+
- 		/* Wait without holding the tx_lock */
- 		spin_unlock_irqrestore(&glink->tx_lock, flags);
- 
--		usleep_range(10000, 15000);
-+		wait_event_timeout(glink->tx_avail_notify,
-+				   qcom_glink_tx_avail(glink) >= tlen, 10 * HZ);
- 
- 		spin_lock_irqsave(&glink->tx_lock, flags);
-+
-+		if (qcom_glink_tx_avail(glink) >= tlen)
-+			glink->sent_read_notify = false;
- 	}
- 
- 	qcom_glink_tx_write(glink, hdr, hlen, data, dlen);
-@@ -986,6 +1013,9 @@
- 	unsigned int cmd;
- 	int ret = 0;
- 
-+	/* To wakeup any blocking writers */
-+	wake_up_all(&glink->tx_avail_notify);
-+
- 	for (;;) {
- 		avail = qcom_glink_rx_avail(glink);
- 		if (avail < sizeof(msg))
-@@ -1271,6 +1301,8 @@
- 	} __packed req;
- 	int ret;
- 	unsigned long flags;
-+	int chunk_size = len;
-+	int left_size = 0;
- 
- 	if (!glink->intentless) {
- 		while (!intent) {
-@@ -1304,18 +1336,46 @@
- 		iid = intent->id;
- 	}
- 
-+	if (wait && chunk_size > SZ_8K) {
-+		chunk_size = SZ_8K;
-+		left_size = len - chunk_size;
-+	}
- 	req.msg.cmd = cpu_to_le16(RPM_CMD_TX_DATA);
- 	req.msg.param1 = cpu_to_le16(channel->lcid);
- 	req.msg.param2 = cpu_to_le32(iid);
--	req.chunk_size = cpu_to_le32(len);
--	req.left_size = cpu_to_le32(0);
-+	req.chunk_size = cpu_to_le32(chunk_size);
-+	req.left_size = cpu_to_le32(left_size);
- 
--	ret = qcom_glink_tx(glink, &req, sizeof(req), data, len, wait);
-+	ret = qcom_glink_tx(glink, &req, sizeof(req), data, chunk_size, wait);
- 
- 	/* Mark intent available if we failed */
--	if (ret && intent)
-+	if (ret && intent) {
- 		intent->in_use = false;
-+		return ret;
-+	}
- 
-+	while (left_size > 0) {
-+		data = (void *)((char *)data + chunk_size);
-+		chunk_size = left_size;
-+		if (chunk_size > SZ_8K)
-+			chunk_size = SZ_8K;
-+		left_size -= chunk_size;
-+
-+		req.msg.cmd = cpu_to_le16(RPM_CMD_TX_DATA_CONT);
-+		req.msg.param1 = cpu_to_le16(channel->lcid);
-+		req.msg.param2 = cpu_to_le32(iid);
-+		req.chunk_size = cpu_to_le32(chunk_size);
-+		req.left_size = cpu_to_le32(left_size);
-+
-+		ret = qcom_glink_tx(glink, &req, sizeof(req), data,
-+				    chunk_size, wait);
-+
-+		/* Mark intent available if we failed */
-+		if (ret && intent) {
-+			intent->in_use = false;
-+			break;
-+		}
-+	}
- 	return ret;
- }
- 
-@@ -1387,9 +1447,7 @@
- static void qcom_glink_rpdev_release(struct device *dev)
- {
- 	struct rpmsg_device *rpdev = to_rpmsg_device(dev);
--	struct glink_channel *channel = to_glink_channel(rpdev->ept);
- 
--	channel->rpdev = NULL;
- 	kfree(rpdev);
- }
- 
-@@ -1494,6 +1552,7 @@
- 
- 		rpmsg_unregister_device(glink->dev, &chinfo);
- 	}
-+	channel->rpdev = NULL;
- 
- 	qcom_glink_send_close_ack(glink, channel->rcid);
- 
-@@ -1507,9 +1566,13 @@
- 
- static void qcom_glink_rx_close_ack(struct qcom_glink *glink, unsigned int lcid)
- {
-+	struct rpmsg_channel_info chinfo;
- 	struct glink_channel *channel;
- 	unsigned long flags;
- 
-+	/* To wakeup any blocking writers */
-+	wake_up_all(&glink->tx_avail_notify);
-+
- 	spin_lock_irqsave(&glink->idr_lock, flags);
- 	channel = idr_find(&glink->lcids, lcid);
- 	if (WARN(!channel, "close ack on unknown channel\n")) {
-@@ -1521,6 +1584,16 @@
- 	channel->lcid = 0;
- 	spin_unlock_irqrestore(&glink->idr_lock, flags);
- 
-+	/* Decouple the potential rpdev from the channel */
-+	if (channel->rpdev) {
-+		strscpy(chinfo.name, channel->name, sizeof(chinfo.name));
-+		chinfo.src = RPMSG_ADDR_ANY;
-+		chinfo.dst = RPMSG_ADDR_ANY;
-+
-+		rpmsg_unregister_device(glink->dev, &chinfo);
-+	}
-+	channel->rpdev = NULL;
-+
- 	kref_put(&channel->refcount, qcom_glink_channel_release);
- }
- 
-@@ -1670,6 +1743,7 @@
- 	spin_lock_init(&glink->rx_lock);
- 	INIT_LIST_HEAD(&glink->rx_queue);
- 	INIT_WORK(&glink->rx_work, qcom_glink_work);
-+	init_waitqueue_head(&glink->tx_avail_notify);
- 
- 	spin_lock_init(&glink->idr_lock);
- 	idr_init(&glink->lcids);
 diff -ruN a/drivers/scsi/scsi_pm.c b/drivers/scsi/scsi_pm.c
 --- a/drivers/scsi/scsi_pm.c	2021-12-08 09:04:57.000000000 +0100
 +++ b/drivers/scsi/scsi_pm.c	2021-12-23 08:35:46.000000000 +0100
diff --git a/kernel-patches/6.1/others/steamdeck.patch b/kernel-patches/6.1/others/steamdeck.patch
index 3d72a67ac9..bc0165b67d 100644
--- a/kernel-patches/6.1/others/steamdeck.patch
+++ b/kernel-patches/6.1/others/steamdeck.patch
@@ -719,14 +719,6 @@ diff -ruN a/drivers/input/joystick/xpad.c b/drivers/input/joystick/xpad.c
  	{ 0x31e3, 0x1100, "Wooting One", 0, XTYPE_XBOX360 },
  	{ 0x31e3, 0x1200, "Wooting Two", 0, XTYPE_XBOX360 },
  	{ 0x31e3, 0x1210, "Wooting Lekker", 0, XTYPE_XBOX360 },
-@@ -474,6 +475,7 @@
- 	XPAD_XBOX360_VENDOR(0x0f0d),		/* Hori Controllers */
- 	XPAD_XBOXONE_VENDOR(0x0f0d),		/* Hori Controllers */
- 	XPAD_XBOX360_VENDOR(0x1038),		/* SteelSeries Controllers */
-+	XPAD_XBOXONE_VENDOR(0x10f5),		/* Turtle Beach Controllers */
- 	XPAD_XBOX360_VENDOR(0x11c9),		/* Nacon GC100XF */
- 	XPAD_XBOX360_VENDOR(0x1209),		/* Ardwiino Controllers */
- 	XPAD_XBOX360_VENDOR(0x12ab),		/* X-Box 360 dance pads */
 @@ -492,7 +494,9 @@
  	XPAD_XBOXONE_VENDOR(0x24c6),		/* PowerA Controllers */
  	XPAD_XBOX360_VENDOR(0x2563),		/* OneXPlayer Gamepad */
diff --git a/prepare_kernels.sh b/prepare_kernels.sh
index d8dd029500..5b981eb250 100755
--- a/prepare_kernels.sh
+++ b/prepare_kernels.sh
@@ -120,6 +120,6 @@ done
 rm -rf ./kernels
 mkdir ./kernels
 
-chromeos_version="R120"
+chromeos_version="R121"
 download_and_patch_kernels