diff --git a/general/package/hisilicon-opensdk/hisilicon-opensdk.mk b/general/package/hisilicon-opensdk/hisilicon-opensdk.mk
index 99bf909bd0..b90fa4e007 100644
--- a/general/package/hisilicon-opensdk/hisilicon-opensdk.mk
+++ b/general/package/hisilicon-opensdk/hisilicon-opensdk.mk
@@ -5,7 +5,7 @@
 ################################################################################
 
 HISILICON_OPENSDK_SITE = $(call github,openipc,openhisilicon,$(HISILICON_OPENSDK_VERSION))
-HISILICON_OPENSDK_VERSION = b73fc65
+HISILICON_OPENSDK_VERSION = e866011
 
 HISILICON_OPENSDK_LICENSE = GPL-3.0
 HISILICON_OPENSDK_LICENSE_FILES = LICENSE
diff --git a/general/package/hisilicon-osdrv-hi3516av100/files/script/load_hisilicon b/general/package/hisilicon-osdrv-hi3516av100/files/script/load_hisilicon
index e4934ca465..f1776deb3b 100755
--- a/general/package/hisilicon-osdrv-hi3516av100/files/script/load_hisilicon
+++ b/general/package/hisilicon-osdrv-hi3516av100/files/script/load_hisilicon
@@ -12,7 +12,12 @@ mem_start=0x80000000 # phy mem start
 mem_total=$(fw_printenv -n totalmem | tr -d 'M')
 mem_total=${mem_total:=128}
 
-os_mem_size=$(fw_printenv -n osmem | tr -d 'M')
+# Prefer kernel cmdline mem=NM -- that's the authoritative kernel/MMZ split.
+# Fall back to U-Boot osmem env only when the kernel was booted without mem=.
+os_mem_size=$(awk 'BEGIN{RS=" "} /^mem=[0-9]+M/{gsub(/^mem=|M.*$/,""); print; exit}' /proc/cmdline)
+if [ -z "$os_mem_size" ]; then
+	os_mem_size=$(fw_printenv -n osmem | tr -d 'M')
+fi
 os_mem_size=${os_mem_size:=32}
 
 report_error() {
diff --git a/general/package/hisilicon-osdrv-hi3516cv100/files/script/load_hisilicon b/general/package/hisilicon-osdrv-hi3516cv100/files/script/load_hisilicon
index 2a4965a1c2..e97c37ed00 100755
--- a/general/package/hisilicon-osdrv-hi3516cv100/files/script/load_hisilicon
+++ b/general/package/hisilicon-osdrv-hi3516cv100/files/script/load_hisilicon
@@ -9,7 +9,12 @@ mem_start=0x80000000 # phy mem start
 mem_total=$(fw_printenv -n totalmem | tr -d 'M')
 mem_total=${mem_total:=64}
 
-os_mem_size=$(fw_printenv -n osmem | tr -d 'M')
+# Prefer kernel cmdline mem=NM -- that's the authoritative kernel/MMZ split.
+# Fall back to U-Boot osmem env only when the kernel was booted without mem=.
+os_mem_size=$(awk 'BEGIN{RS=" "} /^mem=[0-9]+M/{gsub(/^mem=|M.*$/,""); print; exit}' /proc/cmdline)
+if [ -z "$os_mem_size" ]; then
+	os_mem_size=$(fw_printenv -n osmem | tr -d 'M')
+fi
 os_mem_size=${os_mem_size:=32}
 
 # Sensor config
diff --git a/general/package/hisilicon-osdrv-hi3516cv200/files/script/load_hisilicon b/general/package/hisilicon-osdrv-hi3516cv200/files/script/load_hisilicon
index 533d0a631d..b29427adff 100755
--- a/general/package/hisilicon-osdrv-hi3516cv200/files/script/load_hisilicon
+++ b/general/package/hisilicon-osdrv-hi3516cv200/files/script/load_hisilicon
@@ -13,7 +13,12 @@ mem_start=0x80000000 # phy mem start
 mem_total=$(fw_printenv -n totalmem | tr -d 'M')
 mem_total=${mem_total:=64}
 
-os_mem_size=$(fw_printenv -n osmem | tr -d 'M')
+# Prefer kernel cmdline mem=NM -- that's the authoritative kernel/MMZ split.
+# Fall back to U-Boot osmem env only when the kernel was booted without mem=.
+os_mem_size=$(awk 'BEGIN{RS=" "} /^mem=[0-9]+M/{gsub(/^mem=|M.*$/,""); print; exit}' /proc/cmdline)
+if [ -z "$os_mem_size" ]; then
+	os_mem_size=$(fw_printenv -n osmem | tr -d 'M')
+fi
 os_mem_size=${os_mem_size:=32}
 
 report_error() {
diff --git a/general/package/hisilicon-osdrv-hi3516cv300/files/script/load_hisilicon b/general/package/hisilicon-osdrv-hi3516cv300/files/script/load_hisilicon
index 834f4b26b1..91fe59768b 100755
--- a/general/package/hisilicon-osdrv-hi3516cv300/files/script/load_hisilicon
+++ b/general/package/hisilicon-osdrv-hi3516cv300/files/script/load_hisilicon
@@ -13,7 +13,12 @@ mem_start=0x80000000;                             # phy mem start
 mem_total=$(fw_printenv -n totalmem | tr -d 'M')
 mem_total=${mem_total:=64}
 
-os_mem_size=$(fw_printenv -n osmem | tr -d 'M')
+# Prefer kernel cmdline mem=NM -- that's the authoritative kernel/MMZ split.
+# Fall back to U-Boot osmem env only when the kernel was booted without mem=.
+os_mem_size=$(awk 'BEGIN{RS=" "} /^mem=[0-9]+M/{gsub(/^mem=|M.*$/,""); print; exit}' /proc/cmdline)
+if [ -z "$os_mem_size" ]; then
+	os_mem_size=$(fw_printenv -n osmem | tr -d 'M')
+fi
 os_mem_size=${os_mem_size:=32}
 
 # Sensor config
diff --git a/general/package/hisilicon-osdrv-hi3516cv500/files/script/load_hisilicon b/general/package/hisilicon-osdrv-hi3516cv500/files/script/load_hisilicon
index 782f9c0e67..173af22f40 100755
--- a/general/package/hisilicon-osdrv-hi3516cv500/files/script/load_hisilicon
+++ b/general/package/hisilicon-osdrv-hi3516cv500/files/script/load_hisilicon
@@ -15,7 +15,12 @@ mem_start=0x80000000 # phy mem start
 mem_total=$(fw_printenv -n totalmem | tr -d 'M')
 mem_total=${mem_total:=64}
 
-os_mem_size=$(fw_printenv -n osmem | tr -d 'M')
+# Prefer kernel cmdline mem=NM -- that's the authoritative kernel/MMZ split.
+# Fall back to U-Boot osmem env only when the kernel was booted without mem=.
+os_mem_size=$(awk 'BEGIN{RS=" "} /^mem=[0-9]+M/{gsub(/^mem=|M.*$/,""); print; exit}' /proc/cmdline)
+if [ -z "$os_mem_size" ]; then
+	os_mem_size=$(fw_printenv -n osmem | tr -d 'M')
+fi
 os_mem_size=${os_mem_size:=32}
 
 SNS_TYPE0=imx327 # sensor type
diff --git a/general/package/hisilicon-osdrv-hi3516ev200/files/script/load_hisilicon b/general/package/hisilicon-osdrv-hi3516ev200/files/script/load_hisilicon
index 1fcb130328..d3628a2be3 100755
--- a/general/package/hisilicon-osdrv-hi3516ev200/files/script/load_hisilicon
+++ b/general/package/hisilicon-osdrv-hi3516ev200/files/script/load_hisilicon
@@ -15,7 +15,12 @@ mem_start=0x40000000 # phy mem start
 mem_total=$(fw_printenv -n totalmem | tr -d 'M')
 mem_total=${mem_total:=64}
 
-os_mem_size=$(fw_printenv -n osmem | tr -d 'M')
+# Prefer kernel cmdline mem=NM -- that's the authoritative kernel/MMZ split.
+# Fall back to U-Boot osmem env only when the kernel was booted without mem=.
+os_mem_size=$(awk 'BEGIN{RS=" "} /^mem=[0-9]+M/{gsub(/^mem=|M.*$/,""); print; exit}' /proc/cmdline)
+if [ -z "$os_mem_size" ]; then
+	os_mem_size=$(fw_printenv -n osmem | tr -d 'M')
+fi
 os_mem_size=${os_mem_size:=32}
 
 YUV_TYPE0=0 # 0 -- raw, 1 --DC, 2 --bt1120, 3 --bt656
diff --git a/general/package/hisilicon-osdrv-hi3519v101/files/script/load_hisilicon b/general/package/hisilicon-osdrv-hi3519v101/files/script/load_hisilicon
index a5221ddd6d..d25aabf130 100755
--- a/general/package/hisilicon-osdrv-hi3519v101/files/script/load_hisilicon
+++ b/general/package/hisilicon-osdrv-hi3519v101/files/script/load_hisilicon
@@ -12,7 +12,12 @@ mem_start=0x80000000 # phy mem start
 mem_total=$(fw_printenv -n totalmem | tr -d 'M')
 mem_total=${mem_total:=64}
 
-os_mem_size=$(fw_printenv -n osmem | tr -d 'M')
+# Prefer kernel cmdline mem=NM -- that's the authoritative kernel/MMZ split.
+# Fall back to U-Boot osmem env only when the kernel was booted without mem=.
+os_mem_size=$(awk 'BEGIN{RS=" "} /^mem=[0-9]+M/{gsub(/^mem=|M.*$/,""); print; exit}' /proc/cmdline)
+if [ -z "$os_mem_size" ]; then
+	os_mem_size=$(fw_printenv -n osmem | tr -d 'M')
+fi
 os_mem_size=${os_mem_size:=32}
 
 # Sensor config
diff --git a/general/package/hisilicon-osdrv-hi3536dv100/files/script/load_hisilicon b/general/package/hisilicon-osdrv-hi3536dv100/files/script/load_hisilicon
index bc29d537c4..55ff864c41 100755
--- a/general/package/hisilicon-osdrv-hi3536dv100/files/script/load_hisilicon
+++ b/general/package/hisilicon-osdrv-hi3536dv100/files/script/load_hisilicon
@@ -8,7 +8,12 @@ mem_start=0x80000000
 mem_total=$(fw_printenv -n totalmem | tr -d 'M')
 mem_total=${mem_total:=64}
 
-os_mem_size=$(fw_printenv -n osmem | tr -d 'M')
+# Prefer kernel cmdline mem=NM -- that's the authoritative kernel/MMZ split.
+# Fall back to U-Boot osmem env only when the kernel was booted without mem=.
+os_mem_size=$(awk 'BEGIN{RS=" "} /^mem=[0-9]+M/{gsub(/^mem=|M.*$/,""); print; exit}' /proc/cmdline)
+if [ -z "$os_mem_size" ]; then
+	os_mem_size=$(fw_printenv -n osmem | tr -d 'M')
+fi
 os_mem_size=${os_mem_size:=32}
 
 mmz_start=0