Differences

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--- pinephone [2020/06/24 12:29] – [Current State] mark
+++ pinephone [2025/05/09 05:29] (current) – external edit 127.0.0.1
@@ Line 56: / Line 56: @@
+===== Changelog =====
-==== Kernel ====
+There is no official changelog,
+https://www.retallack.org.uk/pinephonechangelog.html
+===== Kernel =====
 The kernel currently used is:
@@ Line 88: / Line 94: @@
-==== Crust ====
+===== Crust =====
 The Pinephone uses CRUST to do the power management.
@@ Line 96: / Line 102: @@
-==== Current State ====
+===== Current State =====
 The following is not working:
@@ Line 108: / Line 114: @@
-=== Vibration motor ===
+==== Vibration motor ====
 From https://xnux.eu/devices/feature/vibrator.html#toc-example-program-to-control-the-vibration-motor there is a test app (assuming its using the force feedback input).
@@ Line 143: / Line 149: @@
-=== Camera ===
+==== Camera =====
-The camera is a OV6540 and is connected via the sun6i csi interface.
+The camera is a OV6540 and is connected via the sun6i csi interface. This is how to enable it
-The PostmarketOS kernel (Pulled in APKBUILD from https://gitlab.com/postmarketOS/pmaports/-/tree/master/main/linux-postmarketos-allwinner ) pulls in https://gitlab.com/pine64-org/linux/-/tree/2a6074e53b019db8a4a63cb255bc29422db3fe19
-When this is compared to the current ubtouch kernel there are a few changes to the DTS files, and the sunxi usb module. However the bug difference is the kernel config files. They are very different.
+So First we need to enable a number of modules in the kernel tree
+<code>
+CONFIG_V4L2_FLASH_LED_CLASS=m
+CONFIG_LEDS_CLASS_FLASH=m
+CONFIG_LEDS_BRIGHTNESS_HW_CHANGED=y
+CONFIG_LEDS_SGM3140=m
+</code>
-The first is that CONFIG_VIDEO_DEV is build into the kernel, while ut is a module. This also includes CONFIG_VIDEO_V4L2. And CONFIG_V4L2_MEM2MEM_DEV=y for the pmos.
+Then compile up the kernel modules, this generates three new modules led-class-flash.ko, v4l2-flash-led-class.ko, leds-sgm3140.ko.
-The following is also set on the pmos:
+Copy these over the PinePhone and install them into the running kernel:
 <code>
-CONFIG_STAGING_MEDIA=y
+sudo insmod led-class-flash.ko
-CONFIG_VIDEO_SUNXI=y
+sudo insmod v4l2-flash-led-class.ko
-CONFIG_VIDEO_SUNXI_CEDRUS=y
+sudo insmod leds-sgm3140.ko
 </code>
-None of these are set on the ut kernel.
+You should now have the /dev/media1 device.
-CONFIG_MEDIA_SUPPORT is also set to a module on ut, it exists, but does not load(does not fail to load). May be a dummy module?
+Next, UT does not have media-ctl, we could use the apt version, however that one is too old. Instead I used: https://archlinuxarm.org/packages/aarch64/v4l-utils
-Interestingly, CONFIG_VIDEO_SUN4I_CSI is not set in pmos, but is set to module in ut.
+Download this package and copy just the media-ctl over to the PinePhone. Then setup the media device:
-Strangely, if we extract config.gz from the phone, its different to the one used in the kernel!!!!
+<code>
+sudo ./media-ctl -d /dev/media1 --set-v4l2 '"ov5640 3-004c":0[fmt:UYVY8_2X8/1280x720]'
+</code>
+Now we need to check that it all works
-The actual config file is a lot closer to the pmos one. And nothing seems to suggest a major difference.
+Ok, by using fswebcam, we can install this from apt (Note this may be unsafe and could brick the PinePhone......)
+<code>
+sudo mount /dev/loop0 / -o remount,rw
+sudo apt-get install fswebcam
+sudo mount /dev/loop0 / -o remount,ro
+</code>
+And now we are ready to capture:
+<code>
+fswebcam --device /dev/video1 --resolution 1280x720  -p UYVY --verbose --save bob.jpeg
+</code>
+Using gstreamer, the orientation is wrong.
+V4l2Src should implement GstVideoOrientation see https://gstreamer.freedesktop.org/data/doc/gstreamer/head/gst-plugins-good/html/gst-plugins-good-plugins-v4l2src.html
+GstVideoOrientation
+See
+https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/blob/230cf41cc966d7b3ebea248b82e1e3a60ac58d63/sys/v4l2/gstv4l2src.c#L110
+this is implemented in
+https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/blob/1.10.4/sys/v4l2/gstv4l2vidorient.c
+For gst-droid (used on android), https://github.com/sailfishos/gst-droid/blob/e755c8521b3ff0a622fba4c85e57ff41015c7793/gst/droidcamsrc/gstdroidcamsrc.c#L271
+For droidcamsrc:
+https://github.com/sailfishos/gst-droidcamsrc
+So does not look like v4l handles angle
+==== PinePhone Camera ====
+I have created a special version of the Camera app for the Pinephone, this is not the correct solution to the problem, but works for now.
+The following script also needs to be run once to setup the media control and video input. It assumes the the non-standard version of media-ctl is available along with the kernel modules (see above).
+<code>
+#!/bin/bash
+sudo insmod led-class-flash.ko
+sudo insmod v4l2-flash-led-class.ko
+sudo insmod leds-sgm3140.ko
+sudo ./media-ctl -d /dev/media1 --set-v4l2 '"ov5640 3-004c":0[fmt:UYVY8_2X8/1920x1080@1/20]'
+sudo v4l2-ctl --set-ctrl horizontal_flip=1 --device=/dev/video1
+sudo v4l2-ctl --set-ctrl vertical_flip=1 --device=/dev/video1
+</code>
-OPPS wrong kernel branch!!!!! try again....
+The Custom version of the camera can be found here: {{ ::uk.co.retallack.camera-3.1.5.arm64.zip |}}
+And the src is: https://gitlab.com/Retallack/camera-app
-=== Cross Compile ===
+===== Cross Compile =====
 https://blog.marcg.pizza/marcg/pinephone-arm-build-environment-setup