4 files changed, 45 insertions, 8 deletions

diff --git a/drivers/misc/mei/bus.c b/drivers/misc/mei/bus.c
index a0a495c95e3c..8d468e0a950a 100644
--- a/drivers/misc/mei/bus.c
+++ b/drivers/misc/mei/bus.c
@@ -765,7 +765,7 @@ static ssize_t uuid_show(struct device *dev, struct device_attribute *a,
 	struct mei_cl_device *cldev = to_mei_cl_device(dev);
 	const uuid_le *uuid = mei_me_cl_uuid(cldev->me_cl);
 
-	return scnprintf(buf, PAGE_SIZE, "%pUl", uuid);
+	return sprintf(buf, "%pUl", uuid);
 }
 static DEVICE_ATTR_RO(uuid);
 
@@ -775,7 +775,7 @@ static ssize_t version_show(struct device *dev, struct device_attribute *a,
 	struct mei_cl_device *cldev = to_mei_cl_device(dev);
 	u8 version = mei_me_cl_ver(cldev->me_cl);
 
-	return scnprintf(buf, PAGE_SIZE, "%02X", version);
+	return sprintf(buf, "%02X", version);
 }
 static DEVICE_ATTR_RO(version);
 
@@ -797,7 +797,7 @@ static ssize_t max_conn_show(struct device *dev, struct device_attribute *a,
 	struct mei_cl_device *cldev = to_mei_cl_device(dev);
 	u8 maxconn = mei_me_cl_max_conn(cldev->me_cl);
 
-	return scnprintf(buf, PAGE_SIZE, "%d", maxconn);
+	return sprintf(buf, "%d", maxconn);
 }
 static DEVICE_ATTR_RO(max_conn);
 
@@ -807,7 +807,7 @@ static ssize_t fixed_show(struct device *dev, struct device_attribute *a,
 	struct mei_cl_device *cldev = to_mei_cl_device(dev);
 	u8 fixed = mei_me_cl_fixed(cldev->me_cl);
 
-	return scnprintf(buf, PAGE_SIZE, "%d", fixed);
+	return sprintf(buf, "%d", fixed);
 }
 static DEVICE_ATTR_RO(fixed);
 
@@ -817,7 +817,7 @@ static ssize_t max_len_show(struct device *dev, struct device_attribute *a,
 	struct mei_cl_device *cldev = to_mei_cl_device(dev);
 	u32 maxlen = mei_me_cl_max_len(cldev->me_cl);
 
-	return scnprintf(buf, PAGE_SIZE, "%u", maxlen);
+	return sprintf(buf, "%u", maxlen);
 }
 static DEVICE_ATTR_RO(max_len);
 
diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c b/drivers/misc/mei/hdcp/mei_hdcp.c
index 93027fd96c71..4c596c646ac0 100644
--- a/drivers/misc/mei/hdcp/mei_hdcp.c
+++ b/drivers/misc/mei/hdcp/mei_hdcp.c
@@ -757,11 +757,38 @@ static const struct component_master_ops mei_component_master_ops = {
 	.unbind = mei_component_master_unbind,
 };
 
+/**
+ * mei_hdcp_component_match - compare function for matching mei hdcp.
+ *
+ *    The function checks if the driver is i915, the subcomponent is HDCP
+ *    and the grand parent of hdcp and the parent of i915 are the same
+ *    PCH device.
+ *
+ * @dev: master device
+ * @subcomponent: subcomponent to match (I915_COMPONENT_HDCP)
+ * @data: compare data (mei hdcp device)
+ *
+ * Return:
+ * * 1 - if components match
+ * * 0 - otherwise
+ */
 static int mei_hdcp_component_match(struct device *dev, int subcomponent,
 				    void *data)
 {
-	return !strcmp(dev->driver->name, "i915") &&
-	       subcomponent == I915_COMPONENT_HDCP;
+	struct device *base = data;
+
+	if (strcmp(dev->driver->name, "i915") ||
+	    subcomponent != I915_COMPONENT_HDCP)
+		return 0;
+
+	base = base->parent;
+	if (!base)
+		return 0;
+
+	base = base->parent;
+	dev = dev->parent;
+
+	return (base && dev && dev == base);
 }
 
 static int mei_hdcp_probe(struct mei_cl_device *cldev,
@@ -785,7 +812,7 @@ static int mei_hdcp_probe(struct mei_cl_device *cldev,
 
 	master_match = NULL;
 	component_match_add_typed(&cldev->dev, &master_match,
-				  mei_hdcp_component_match, comp_master);
+				  mei_hdcp_component_match, &cldev->dev);
 	if (IS_ERR_OR_NULL(master_match)) {
 		ret = -ENOMEM;
 		goto err_exit;
diff --git a/drivers/misc/mei/hw-me-regs.h b/drivers/misc/mei/hw-me-regs.h
index 7cd67fb2365d..87a0201ba6b3 100644
--- a/drivers/misc/mei/hw-me-regs.h
+++ b/drivers/misc/mei/hw-me-regs.h
@@ -81,10 +81,16 @@
 
 #define MEI_DEV_ID_CMP_LP     0x02e0  /* Comet Point LP */
 #define MEI_DEV_ID_CMP_LP_3   0x02e4  /* Comet Point LP 3 (iTouch) */
+
 #define MEI_DEV_ID_CMP_V      0xA3BA  /* Comet Point Lake V */
 
+#define MEI_DEV_ID_CMP_H      0x06e0  /* Comet Lake H */
+#define MEI_DEV_ID_CMP_H_3    0x06e4  /* Comet Lake H 3 (iTouch) */
+
 #define MEI_DEV_ID_ICP_LP     0x34E0  /* Ice Lake Point LP */
 
+#define MEI_DEV_ID_JSP_N      0x4DE0  /* Jasper Lake Point N */
+
 #define MEI_DEV_ID_TGP_LP     0xA0E0  /* Tiger Lake Point LP */
 
 #define MEI_DEV_ID_MCC        0x4B70  /* Mule Creek Canyon (EHL) */
diff --git a/drivers/misc/mei/pci-me.c b/drivers/misc/mei/pci-me.c
index c845b7e40f26..2711451b3d87 100644
--- a/drivers/misc/mei/pci-me.c
+++ b/drivers/misc/mei/pci-me.c
@@ -99,11 +99,15 @@ static const struct pci_device_id mei_me_pci_tbl[] = {
 	{MEI_PCI_DEVICE(MEI_DEV_ID_CMP_LP, MEI_ME_PCH12_CFG)},
 	{MEI_PCI_DEVICE(MEI_DEV_ID_CMP_LP_3, MEI_ME_PCH8_CFG)},
 	{MEI_PCI_DEVICE(MEI_DEV_ID_CMP_V, MEI_ME_PCH12_CFG)},
+	{MEI_PCI_DEVICE(MEI_DEV_ID_CMP_H, MEI_ME_PCH12_CFG)},
+	{MEI_PCI_DEVICE(MEI_DEV_ID_CMP_H_3, MEI_ME_PCH8_CFG)},
 
 	{MEI_PCI_DEVICE(MEI_DEV_ID_ICP_LP, MEI_ME_PCH12_CFG)},
 
 	{MEI_PCI_DEVICE(MEI_DEV_ID_TGP_LP, MEI_ME_PCH15_CFG)},
 
+	{MEI_PCI_DEVICE(MEI_DEV_ID_JSP_N, MEI_ME_PCH15_CFG)},
+
 	{MEI_PCI_DEVICE(MEI_DEV_ID_MCC, MEI_ME_PCH15_CFG)},
 	{MEI_PCI_DEVICE(MEI_DEV_ID_MCC_4, MEI_ME_PCH8_CFG)},