Make use of the new and opensource libcamera software stack.

- Add libcamera
- Add libcamera-apps
- changes to rootfs to make use of the above

Needs testing and possible other fixes/changes

buildroot-external/board/raspberrypi/config_3_64bit.txt

@@ -5,8 +5,8 @@
 # and http://elinux.org/RPiconfig for a description of config.txt syntax
 # We always use the same names, the real used variant is selected by
 # BR2_PACKAGE_RPI_FIRMWARE_{DEFAULT,X,CD} choice
-start_file=start.elf
+start_file=startx.elf
-fixup_file=fixup.dat
+fixup_file=fixupx.dat
 
 kernel=Image
 
@@ -16,13 +16,14 @@ kernel=Image
 # Disable overscan assuming the display supports displaying the full resolution
 # If the text shown on the screen disappears off the edge, comment this out
 # disable_overscan=1
+
+# Automatically load overlays for detected DSI displays
 dtoverlay=vc4-fkms-v3d
 # dtoverlay=vc4-kms-v3d
 hdmi_drive=2
 hdmi_group=2
 hdmi_mode=14
 max_framebuffers=2
-
 # uncomment if you get no picture on HDMI for a default "safe" mode
 # hdmi_safe=1
 
@@ -42,6 +43,11 @@ dtoverlay=krnbt=on
 # Enable the onboard soundcard
 dtparam=audio=on
 
+# Enable camera driver
+# dtoverlay=imx219
+# dtoverlay=ov5647
+# camera_auto_detect=1
+
 # Disable rainbow color splash
 disable_splash=1
 

buildroot-external/board/raspberrypi/config_4_64bit.txt

@@ -5,8 +5,8 @@
 # and http://elinux.org/RPiconfig for a description of config.txt syntax
 # We always use the same names, the real used variant is selected by
 # BR2_PACKAGE_RPI_FIRMWARE_{DEFAULT,X,CD} choice
-start_file=start4.elf
+start_file=start4x.elf
-fixup_file=fixup4.dat
+fixup_file=fixup4x.dat
 
 kernel=Image
 
@@ -16,13 +16,17 @@ kernel=Image
 # Disable overscan assuming the display supports displaying the full resolution
 # If the text shown on the screen disappears off the edge, comment this out
 # disable_overscan=1
+
+# Automatically load overlays for detected DSI displays
+display_auto_detect=1
+
+# Enable DRM VC4 V3D driver and setup the mode
 dtoverlay=vc4-fkms-v3d
 # dtoverlay=vc4-kms-v3d-pi4
 hdmi_drive=2
 hdmi_group=2
 hdmi_mode=14
 max_framebuffers=2
-
 # uncomment if you get no picture on HDMI for a default "safe" mode
 # hdmi_safe=1
 
@@ -34,7 +38,7 @@ gpu_mem_512=128
 gpu_mem_1024=128
 
 # fixes rpi (3B, 3B+, 3A+, 4B and Zero W) ttyAMA0 serial console
-# dtoverlay=miniuart-bt
+dtoverlay=miniuart-bt
 
 # enable autoprobing of Bluetooth driver without need of hciattach/btattach
 dtoverlay=krnbt=on
@@ -45,6 +49,7 @@ dtparam=audio=on
 # Enable camera driver
 # dtoverlay=imx219
 dtoverlay=ov5647
+# camera_auto_detect=1
 
 # Disable rainbow color splash
 disable_splash=1

buildroot-external/board/raspberrypi/genimage-raspberrypi3-64.cfg

@@ -9,6 +9,10 @@ image boot.vfat {
       "rpi-firmware/config.txt",
       "rpi-firmware/fixup.dat",
       "rpi-firmware/start.elf",
+      "rpi-firmware/fixupcd.dat",
+      "rpi-firmware/startcd.elf",
+      "rpi-firmware/fixupx.dat",
+      "rpi-firmware/startx.elf",
       "overlays",
       "Image"
     }

buildroot-external/board/raspberrypi/genimage-raspberrypi4-64.cfg

@@ -6,6 +6,10 @@ image boot.vfat {
       "rpi-firmware/config.txt",
       "rpi-firmware/fixup4.dat",
       "rpi-firmware/start4.elf",
+      "rpi-firmware/fixup4cd.dat",
+      "rpi-firmware/start4cd.elf",
+      "rpi-firmware/fixup4x.dat",
+      "rpi-firmware/start4x.elf",
       "rpi-firmware/overlays",
       "Image"
     }

buildroot-external/board/raspberrypi/rootfs-overlay/etc/modprobe.d/blacklist.conf

@@ -0,0 +1 @@
+blacklist bcm2835-v4l2

buildroot-external/board/raspberrypi/rootfs-overlay/etc/udev/rules.d/99-com.rules

@@ -2,21 +2,38 @@ SUBSYSTEM=="input", GROUP="input", MODE="0660"
 SUBSYSTEM=="i2c-dev", GROUP="i2c", MODE="0660"
 SUBSYSTEM=="spidev", GROUP="spi", MODE="0660"
 SUBSYSTEM=="bcm2835-gpiomem", GROUP="gpio", MODE="0660"
-SUBSYSTEM=="argon-*", GROUP="video", MODE="0660"
+SUBSYSTEM=="bcm2835-gpiomem", GROUP="gpio", MODE="0660"
 SUBSYSTEM=="rpivid-*", GROUP="video", MODE="0660"
 
-SUBSYSTEM=="gpio", GROUP="gpio", MODE="0660"
+KERNEL=="vcsm-cma", GROUP="video", MODE="0660"
-SUBSYSTEM=="gpio*", PROGRAM="/bin/sh -c '\
+SUBSYSTEM=="dma_heap", GROUP="video", MODE="0660"
-        chown -R root:gpio /sys/class/gpio && chmod -R 770 /sys/class/gpio;\
+SUBSYSTEM=="vchiq", GROUP="video", MODE="0660"
-        chown -R root:gpio /sys/devices/virtual/gpio && chmod -R 770 /sys/devices/virtual/gpio;\
-        chown -R root:gpio /sys$devpath && chmod -R 770 /sys$devpath\
-'"
 
-KERNEL=="ttyAMA[01]", PROGRAM="/bin/sh -c '\
+SUBSYSTEM=="gpio", GROUP="gpio", MODE="0660"
+SUBSYSTEM=="gpio", KERNEL=="gpiochip*", ACTION=="add", PROGRAM="/bin/sh -c 'chgrp -R gpio /sys/class/gpio && chmod -R g=u /sys/class/gpio'"
+SUBSYSTEM=="gpio", ACTION=="add", PROGRAM="/bin/sh -c 'chgrp -R gpio /sys%p && chmod -R g=u /sys%p'"
+
+# PWM export results in a "change" action on the pwmchip device (not "add" of a new device), so match actions other than "remove".
+SUBSYSTEM=="pwm", ACTION!="remove", PROGRAM="/bin/sh -c 'chgrp -R gpio /sys%p && chmod -R g=u /sys%p'"
+
+KERNEL=="ttyAMA0", PROGRAM="/bin/sh -c '\
         ALIASES=/proc/device-tree/aliases; \
-        if cmp -s $ALIASES/uart0 $ALIASES/serial0; then \
+        if cmp -s $$ALIASES/uart0 $$ALIASES/serial0; then \
                 echo 0;\
-        elif cmp -s $ALIASES/uart0 $ALIASES/serial1; then \
+        elif cmp -s $$ALIASES/uart0 $$ALIASES/serial1; then \
+                echo 1; \
+        else \
+                exit 1; \
+        fi\
+'", SYMLINK+="serial%c"
+
+KERNEL=="ttyAMA1", PROGRAM="/bin/sh -c '\
+        ALIASES=/proc/device-tree/aliases; \
+        if [ -e /dev/ttyAMA0 ]; then \
+                exit 1; \
+        elif cmp -s $$ALIASES/uart0 $$ALIASES/serial0; then \
+                echo 0;\
+        elif cmp -s $$ALIASES/uart0 $$ALIASES/serial1; then \
                 echo 1; \
         else \
                 exit 1; \
@@ -25,11 +42,17 @@ KERNEL=="ttyAMA[01]", PROGRAM="/bin/sh -c '\
 
 KERNEL=="ttyS0", PROGRAM="/bin/sh -c '\
         ALIASES=/proc/device-tree/aliases; \
-        if cmp -s $ALIASES/uart1 $ALIASES/serial0; then \
+        if cmp -s $$ALIASES/uart1 $$ALIASES/serial0; then \
                 echo 0; \
-        elif cmp -s $ALIASES/uart1 $ALIASES/serial1; then \
+        elif cmp -s $$ALIASES/uart1 $$ALIASES/serial1; then \
                 echo 1; \
         else \
                 exit 1; \
         fi \
 '", SYMLINK+="serial%c"
+
+ACTION=="add", SUBSYSTEM=="vtconsole", KERNEL=="vtcon1", RUN+="/bin/sh -c '\
+        if echo RPi-Sense FB | cmp -s /sys/class/graphics/fb0/name; then \
+                echo 0 > /sys$devpath/bind; \
+        fi; \
+'"

buildroot-external/configs/rpi3_64-gui_defconfig

@@ -470,15 +470,20 @@ BR2_PACKAGE_CAIRO_SCRIPT=y
 BR2_PACKAGE_CAIRO_SVG=y
 BR2_PACKAGE_GDK_PIXBUF=y
 BR2_PACKAGE_GIFLIB=y
-BR2_PACKAGE_LIBEPOXY=y
 BR2_PACKAGE_LIBVA=y
-BR2_PACKAGE_TIFF=y
 BR2_PACKAGE_WAFFLE=y
 BR2_PACKAGE_LIBCEC=y
 BR2_PACKAGE_LIBINPUT=y
 BR2_PACKAGE_LIBV4L_UTILS=y
 BR2_PACKAGE_LIBFASTJSON=y
 BR2_PACKAGE_YAJL=y
+BR2_PACKAGE_LIBCAMERA_V4L2=y
+BR2_PACKAGE_LIBCAMERA_PIPELINE_RASPBERRYPI=y
+BR2_PACKAGE_LIBCAMERA_PIPELINE_RKISP1=y
+BR2_PACKAGE_LIBCAMERA_PIPELINE_SIMPLE=y
+BR2_PACKAGE_LIBCAMERA_PIPELINE_UVCVIDEO=y
+BR2_PACKAGE_LIBCAMERA_PIPELINE_VIMC=y
+BR2_PACKAGE_LIBCAMERA_APPS=y
 BR2_PACKAGE_LIBMATROSKA=y
 BR2_PACKAGE_LIBMMS=y
 BR2_PACKAGE_LIBMPEG2_BINS=y
@@ -492,6 +497,7 @@ BR2_PACKAGE_LIBSHAIRPLAY=y
 BR2_PACKAGE_BOOST_SYSTEM=y
 BR2_PACKAGE_CMOCKA=y
 BR2_PACKAGE_ELL=y
+BR2_PACKAGE_GTEST=y
 BR2_PACKAGE_LIBCAP_NG=y
 BR2_PACKAGE_LINUX_PAM=y
 BR2_PACKAGE_PROTOBUF=y

buildroot-external/configs/rpi4_64-gui_defconfig

@@ -468,15 +468,20 @@ BR2_PACKAGE_CAIRO_SCRIPT=y
 BR2_PACKAGE_CAIRO_SVG=y
 BR2_PACKAGE_GDK_PIXBUF=y
 BR2_PACKAGE_GIFLIB=y
-BR2_PACKAGE_LIBEPOXY=y
 BR2_PACKAGE_LIBVA=y
-BR2_PACKAGE_TIFF=y
 BR2_PACKAGE_WAFFLE=y
 BR2_PACKAGE_LIBCEC=y
 BR2_PACKAGE_LIBINPUT=y
 BR2_PACKAGE_LIBV4L_UTILS=y
 BR2_PACKAGE_LIBFASTJSON=y
 BR2_PACKAGE_YAJL=y
+BR2_PACKAGE_LIBCAMERA_V4L2=y
+BR2_PACKAGE_LIBCAMERA_PIPELINE_RASPBERRYPI=y
+BR2_PACKAGE_LIBCAMERA_PIPELINE_RKISP1=y
+BR2_PACKAGE_LIBCAMERA_PIPELINE_SIMPLE=y
+BR2_PACKAGE_LIBCAMERA_PIPELINE_UVCVIDEO=y
+BR2_PACKAGE_LIBCAMERA_PIPELINE_VIMC=y
+BR2_PACKAGE_LIBCAMERA_APPS=y
 BR2_PACKAGE_LIBMATROSKA=y
 BR2_PACKAGE_LIBMMS=y
 BR2_PACKAGE_LIBMPEG2_BINS=y
@@ -490,6 +495,7 @@ BR2_PACKAGE_LIBSHAIRPLAY=y
 BR2_PACKAGE_BOOST_SYSTEM=y
 BR2_PACKAGE_CMOCKA=y
 BR2_PACKAGE_ELL=y
+BR2_PACKAGE_GTEST=y
 BR2_PACKAGE_LIBCAP_NG=y
 BR2_PACKAGE_LINUX_PAM=y
 BR2_PACKAGE_PROTOBUF=y