This patch series introduces a few minor fixes on Exynos7870 devices. These fix USB gadget problems and serious crashes on certain variants of devices. More information is provided in respective commits.
This series has no dependencies. Would be nice to get them merged in 6.16 itself. I assume it's okay to cc stable as the -rc releases are also owned by the "Stable Group" in git.kernel.org... [1] [2]
[1] https://git.kernel.org/?q=Stable+Group [2] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Signed-off-by: Kaustabh Chakraborty kauschluss@disroot.org --- Kaustabh Chakraborty (3): arm64: dts: exynos7870: add quirk to disable USB2 LPM in gadget mode arm64: dts: exynos7870-on7xelte: reduce memory ranges to base amount arm64: dts: exynos7870-j6lte: reduce memory ranges to base amount
arch/arm64/boot/dts/exynos/exynos7870-j6lte.dts | 2 +- arch/arm64/boot/dts/exynos/exynos7870-on7xelte.dts | 2 +- arch/arm64/boot/dts/exynos/exynos7870.dtsi | 1 + 3 files changed, 3 insertions(+), 2 deletions(-) --- base-commit: 1b152eeca84a02bdb648f16b82ef3394007a9dcf change-id: 20250626-exynos7870-dts-fixes-e730f7086ddc
Best regards,
In gadget mode, USB connections are sluggish. The device won't send packets to the host unless the host sends packets to the device. For instance, SSH-ing through the USB network would apparently not work unless you're flood-pinging the device's IP.
Add the property snps,usb2-gadget-lpm-disable to the dwc3 node, which seems to solve this issue.
Fixes: d6f3a7f91fdb ("arm64: dts: exynos: add initial devicetree support for exynos7870") Cc: stable@vger.kernel.org # v6.16 Signed-off-by: Kaustabh Chakraborty kauschluss@disroot.org --- arch/arm64/boot/dts/exynos/exynos7870.dtsi | 1 + 1 file changed, 1 insertion(+)
diff --git a/arch/arm64/boot/dts/exynos/exynos7870.dtsi b/arch/arm64/boot/dts/exynos/exynos7870.dtsi index 5cba8c9bb403405b2d9721ab8cf9d61e3d5faf95..d5d347623b9038b71da55dccdc9084aeaf71618c 100644 --- a/arch/arm64/boot/dts/exynos/exynos7870.dtsi +++ b/arch/arm64/boot/dts/exynos/exynos7870.dtsi @@ -327,6 +327,7 @@ usb@0 { phys = <&usbdrd_phy 0>;
usb-role-switch; + snps,usb2-gadget-lpm-disable; }; };
The device is available in multiple variants with differing RAM capacities. The memory range defined in the 0x80000000 bank exceeds the address range of the memory controller, which eventually leads to ARM SError crashes. Reduce the bank size to a value which is available to all devices.
The bootloader must be responsible for identifying the RAM capacity and editing the memory node accordingly.
Fixes: d6f3a7f91fdb ("arm64: dts: exynos: add initial devicetree support for exynos7870") Cc: stable@vger.kernel.org # v6.16 Signed-off-by: Kaustabh Chakraborty kauschluss@disroot.org --- arch/arm64/boot/dts/exynos/exynos7870-on7xelte.dts | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm64/boot/dts/exynos/exynos7870-on7xelte.dts b/arch/arm64/boot/dts/exynos/exynos7870-on7xelte.dts index eb97dcc415423f405d7df9b9869b2db3432fb483..b1d9eff5a82702cd7c9797b2124486207e03ad89 100644 --- a/arch/arm64/boot/dts/exynos/exynos7870-on7xelte.dts +++ b/arch/arm64/boot/dts/exynos/exynos7870-on7xelte.dts @@ -78,7 +78,7 @@ key-volup { memory@40000000 { device_type = "memory"; reg = <0x0 0x40000000 0x3e400000>, - <0x0 0x80000000 0xbe400000>; + <0x0 0x80000000 0x80000000>; };
pwrseq_mmc1: pwrseq-mmc1 {
The device is available in multiple variants with differing RAM capacities. The memory range defined in the 0x80000000 bank exceeds the address range of the memory controller, which eventually leads to ARM SError crashes. Reduce the bank size to a value which is available to all devices.
The bootloader must be responsible for identifying the RAM capacity and editing the memory node accordingly.
Fixes: d6f3a7f91fdb ("arm64: dts: exynos: add initial devicetree support for exynos7870") Cc: stable@vger.kernel.org # v6.16 Signed-off-by: Kaustabh Chakraborty kauschluss@disroot.org --- arch/arm64/boot/dts/exynos/exynos7870-j6lte.dts | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm64/boot/dts/exynos/exynos7870-j6lte.dts b/arch/arm64/boot/dts/exynos/exynos7870-j6lte.dts index 61eec1aff32ef397c69ee3f0cba8050755f74fc6..b8ce433b93b1b488da31bbe4846f8092243611ad 100644 --- a/arch/arm64/boot/dts/exynos/exynos7870-j6lte.dts +++ b/arch/arm64/boot/dts/exynos/exynos7870-j6lte.dts @@ -89,7 +89,7 @@ key-volup { memory@40000000 { device_type = "memory"; reg = <0x0 0x40000000 0x3d800000>, - <0x0 0x80000000 0x7d800000>; + <0x0 0x80000000 0x40000000>; };
pwrseq_mmc1: pwrseq-mmc1 {
On Thu, 26 Jun 2025 13:02:55 +0530, Kaustabh Chakraborty wrote:
This patch series introduces a few minor fixes on Exynos7870 devices. These fix USB gadget problems and serious crashes on certain variants of devices. More information is provided in respective commits.
This series has no dependencies. Would be nice to get them merged in 6.16 itself. I assume it's okay to cc stable as the -rc releases are also owned by the "Stable Group" in git.kernel.org... [1] [2]
[...]
Applied, thanks!
[1/3] arm64: dts: exynos7870: add quirk to disable USB2 LPM in gadget mode https://git.kernel.org/krzk/linux/c/e9355e894aebcbeacffd284644749190cc5f33a4 [2/3] arm64: dts: exynos7870-on7xelte: reduce memory ranges to base amount https://git.kernel.org/krzk/linux/c/2bdfa35a7bb6e3a319e7a290baa44720bc96e5e4 [3/3] arm64: dts: exynos7870-j6lte: reduce memory ranges to base amount https://git.kernel.org/krzk/linux/c/49a27c6c392dec46c826ee586f7ec8973acaeed7
Best regards,
linux-stable-mirror@lists.linaro.org
-
Kaustabh Chakraborty -
Krzysztof Kozlowski