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Add optional build configuration section

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Signed-off-by: Andrei Gherzan <andrei@gherzan.ro>
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Andrei Gherzan 2016-03-01 14:02:10 +01:00
parent 8948772554
commit 6c6f6cf7b3
1 changed files with 79 additions and 71 deletions
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README
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@ -12,28 +12,30 @@ Contents:
=========
1. Description
2. Yocto BSP Layer - Raspberry Pi
2.A. Compressed deployed files
2.B. GPU memory
2.C. Add purchased license codecs
2.D. Disable overscan
2.E. Set overclocking options
2.F. Optional - Video camera support with V4L2 drivers
2.G. Optional - Enable offline compositing support
2.H. Optional - Enable kgdb over console support
2.I. Images
2.J. Boot to U-Boot
2.K. Image with Initramfs
2.L. Device tree support
2.M. Optional - enable SPI bus
3. Extra apps
3.A. omxplayer
4. Board Configuration
4.A. Audio Routing
5. Source code and mirrors
6. Contribution
5.A. Mailing List
5.B. Redmine
7. Maintainers
2.A. How to use it
2.B. Images
3. Optional build configuration
3.A. Compressed deployed files
3.B. GPU memory
3.C. Add purchased license codecs
3.D. Disable overscan
3.E. Set overclocking options
3.F. Video camera support with V4L2 drivers
3.G. Enable offline compositing support
3.H. Enable kgdb over console support
3.I. Boot to U-Boot
3.J. Image with Initramfs
3.K. Device tree support
3.L. Enable SPI bus
4. Extra apps
4.A. omxplayer
5. Board Configuration
5.A. Audio Routing
6. Source code and mirrors
7. Contribution
7.A. Mailing List
7.B. Redmine
8. Maintainers
1. Description
@ -64,18 +66,35 @@ layers: meta-oe, meta-multimedia
branch: master
revision: HEAD
How to use it:
1. source poky/oe-init-build-env rpi-build
2. Add needed layer to bblayers.conf:
2.A. How to use it
==================
a. source poky/oe-init-build-env rpi-build
b. Add needed layer to bblayers.conf:
- meta-raspberrypi
3 Set MACHINE to "raspberrypi"/"raspberrypi2" in local.conf
4. bitbake rpi-hwup-image
5. dd to a SD card the generated sdimg file (use xzcat if rpi-sdimg.xz is used)
6. Boot your RPI.
c. Set MACHINE to "raspberrypi"/"raspberrypi2" in local.conf
d. bitbake rpi-hwup-image
e. dd to a SD card the generated sdimg file (use xzcat if rpi-sdimg.xz is used)
f. Boot your RPI.
2.A. Optional - compressed deployed files:
==========================================
2.B. Images
-===========
* rpi-hwup-image
Hardware up image
* rpi-basic-image
Based on rpi-hwup-image with some added features (ex: splash)
* rpi-test-image
Image based on rpi-basic-image which includes most of the packages in this
layer and some media samples.
3. Optional build configuration
===============================
There are a set of ways in which a user can influence different paramenters of the build.
We list here the ones that are closely related to this BSP or specific to it. For the rest
please check: http://www.yoctoproject.org/docs/latest/ref-manual/ref-manual.html
3.A. Compressed deployed files
==============================
1. Overwrite IMAGE_FSTYPES in local.conf
IMAGE_FSTYPES = "tar.bz2 ext3.xz"
2. Overwrite SDIMG_ROOTFS_TYPE in local.conf
@ -84,8 +103,8 @@ How to use it:
SDIMG_COMPRESSION = "xz"
*Accommodate the values above to your own needs (ex: ext3 / ext4).
2.B. Optional - GPU memory:
===========================
3.B. GPU memory
===============
Variable : Details
GPU_MEM : GPU memory in megabyte. Sets the memory split between the ARM and
GPU. ARM gets the remaining memory. Min 16. Default 64.
@ -96,8 +115,8 @@ GPU_MEM_512 : GPU memory in megabyte for the 512MB Raspberry Pi. Ignored by the
GPU_MEM_1024: GPU memory in megabyte for the 1024MB Raspberry Pi. Ignored by the
256MB/512MB RP. Overrides gpu_mem. Max 944. Default not set.
2.C.Optional - Add purchased license codecs:
============================================
3.C. Add purchased license codecs
=================================
To add you own licenses use variables KEY_DECODE_MPG2 and KEY_DECODE_WVC1 in
local.conf. Example:
KEY_DECODE_MPG2 = "12345678"
@ -105,15 +124,15 @@ KEY_DECODE_WVC1 = "12345678"
You can supply more licenses separated by comma. Example:
KEY_DECODE_WVC1 = "0x12345678,0xabcdabcd,0x87654321"
2.D. Optional - Disable overscan:
=================================
3.D. Disable overscan
=====================
By default the GPU adds a black border around the video output to compensate for
TVs which cut off part of the image. To disable this set this variable in
local.conf:
DISABLE_OVERSCAN = "1"
2.E. Optional - Set overclocking options:
=========================================
3.E. Set overclocking options
=============================
The Raspberry PI can be overclocked. As of now overclocking up to the "Turbo
Mode" is officially supported by the raspbery and does not void warranty.
Check the config.txt for a detailed description of options and modes. Example:
@ -123,14 +142,13 @@ CORE_FREQ = "500"
SDRAM_FREQ = "500"
OVER_VOLTAGE = "6"
2.F. Optional - Video camera support with V4L2 drivers
======================================================
3.F. Video camera support with V4L2 drivers
===========================================
Set this variable to enable support for the video camera (Linux 3.12.4+ required)
VIDEO_CAMERA = "1"
2.G. Optional - Enable offline compositing support
==================================================
3.G. Enable offline compositing support
=======================================
Set this variable to enable support for dispmanx offline compositing
DISMANX_OFFLINE = "1"
@ -144,23 +162,13 @@ Heavily recommended for Wayland/Weston.
See: http://wayland.freedesktop.org/raspberrypi.html
2.H. Optional - Enable kgdb over console support
================================================
3.H. Enable kgdb over console support
=====================================
To add the kdbg over console (kgdboc) parameter to the kernel command line,
set this variable in local.conf:
ENABLE_KGDB = "1"
2.I. Images
===========
* rpi-hwup-image
Hardware up image
* rpi-basic-image
Based on rpi-hwup-image with some added features (ex: splash)
* rpi-test-image
Image based on rpi-basic-image which includes most of the packages in this
layer and some media samples.
2.J. Boot to U-Boot
3.I. Boot to U-Boot
===================
To have u-boot load kernel image, set in your local.conf
KERNEL_IMAGETYPE = "uImage"
@ -168,7 +176,7 @@ KERNEL_IMAGETYPE = "uImage"
This will make kernel.img be u-boot image which will load uImage.
By default, kernel.img is the actual kernel image (ex. Image).
2.K. Image with Initramfs
3.J. Image with Initramfs
=========================
To build an initramfs image :
* Set this 3 kernel variables (in linux-raspberrypi.inc for example)
@ -181,7 +189,7 @@ To build an initramfs image :
* Set the meta-rasberrypi variable (in raspberrypi.conf for example)
- KERNEL_INITRAMFS = "-initramfs"
2.L. Device tree support
3.K. Device tree support
=========================
Device tree for RPi is only supported when using linux-raspberrypi 3.18+
kernels.
@ -194,25 +202,25 @@ kernels.
NOTE: KERNEL_DEVICETREE is default enabled for kernel >= 3.18 and always disabled for
older kernel versions.
2.M. Optional - enable SPI bus
==============================
3.L. Eenable SPI bus
====================
When using device tree kernels, set this variable to enable the SPI bus
ENABLE_SPI_BUS = "1"
3. Extra apps
4. Extra apps
=============
3.A. omxplayer
4.A. omxplayer
==============
omxplayer depends on libav which has a commercial license. So in order to be
able to compile omxplayer you will need to whiteflag the commercial license
adding to you local.conf:
LICENSE_FLAGS_WHITELIST = "commercial"
4. Board Configuration
5. Board Configuration
======================
4.A. Audio Routing
5.A. Audio Routing
==================
To load audio driver
@ -236,7 +244,7 @@ Options to amixer cset are:
1=headphones
2=hdmi
5. Source code and mirrors
6. Source code and mirrors
==========================
Main repo:
@ -250,10 +258,10 @@ Bitbucket mirror:
https://bitbucket.org/agherzan/meta-raspberrypi
6. Contributing
7. Contributing
===============
6.A. Mailing list
7.A. Mailing list
=================
The main communication tool we use is a mailing list:
yocto@yoctoproject.org
@ -277,7 +285,7 @@ When sending patches to mailing list, please use something like:
git send-email --to yocto@yoctoproject.org <generated patch>
6.B. Redmine
7.B. Redmine
============
In order to manage and trace the meta-raspberrypi issues, we use redmine:
http://redmine.gherzan.ro/projects/meta-raspberrypi
@ -291,7 +299,7 @@ for a bug:
[Bug #13]
7. Maintainers
8. Maintainers
==============
Andrei Gherzan <andrei at gherzan.ro>