d/patches: Correct handling of camera powerdown GPIO

Signed-off-by: Martyn Welch <martyn.welch@collabora.com>

debian/patches/apertis/am62x-csi/0157-arm64-dts-ti-k3-am625-sk-Correct-handling-of-camera-.patch

+From: Martyn Welch <martyn.welch@collabora.com>
+Date: Wed, 19 Apr 2023 18:24:56 +0100
+Subject: arm64: dts: ti: k3-am625-sk: Correct handling of camera powerdown
+ gpio
+
+The camera has a GPIO to control powerdown of the module. The driver in
+older kernel revisions didn't provide support for a power down GPIO, only
+a reset GPIO, which used to work. Proper support has since been added to
+the upstream kernel to properly support a power down GPIO and part of
+that has been backported as a fix to the stable kernel. As a result it
+is necessary to switch to properly declaring the GPIO as powerdown.
+Declaring as a reset GPIO now results in:
+
+[    9.322051] ov5640 4-003c: ov5640_write_reg: error: reg=3008, val=82
+[    9.364810] ov5640 4-003c: ov5640_write_reg: error: reg=3008, val=42
+[    9.373045] ov5640 4-003c: ov5640_write_reg: error: reg=3103, val=11
+[    9.381168] ov5640 4-003c: ov5640_read_reg: error: reg=3108
+[    9.396185] ov5640 4-003c: failed to power on
+
+Signed-off-by: Martyn Welch <martyn.welch@collabora.com>
+---
+ arch/arm64/boot/dts/ti/k3-am625-sk.dts | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/arch/arm64/boot/dts/ti/k3-am625-sk.dts b/arch/arm64/boot/dts/ti/k3-am625-sk.dts
+index f6af54f..54a6f57 100644
+--- a/arch/arm64/boot/dts/ti/k3-am625-sk.dts
++++ b/arch/arm64/boot/dts/ti/k3-am625-sk.dts
+@@ -426,7 +426,7 @@ ov5640: camera@3c {
+ 
+ 				clocks = <&clk_ov5640_fixed>;
+ 				clock-names = "xclk";
+-				reset-gpios = <&exp1 13 GPIO_ACTIVE_LOW>;
++				powerdown-gpios = <&exp1 13 GPIO_ACTIVE_LOW>;
+ 
+ 				port {
+ 					csi2_cam0: endpoint {

debian/patches/series

@@ -191,6 +191,7 @@ apertis/am62x-csi/0138-media-dt-bindings-Add-DT-bindings-for-TI-J721E-CSI2R.patc
 apertis/am62x-csi/0139-media-dt-bindings-Convert-Cadence-CSI2RX-binding-to-.patch
 apertis/am62x-csi/0140-Pull-device-tree-nodes-required-for-camera-use-from-.patch
 apertis/am62x-csi/0141-Hack-ov5640-driver-to-use-1-MIPI-data-lane.patch
+apertis/am62x-csi/0157-arm64-dts-ti-k3-am625-sk-Correct-handling-of-camera-.patch
 
 # AM625 M4F IPC
 apertis/am62x/0149-dt-bindings-remoteproc-k3-m4f-Add-bindings-for-K3-AM.patch