RPiconfig

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Revision as of 12:32, 18 September 2012 by Rew (Talk | contribs)

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The Raspberry Pi config.txt file is read by the GPU before the ARM core is initialised. It can be used to set various system configuration parameters.

This file is an optional file on the boot partition. It would normally be accessible as /boot/config.txt from Linux.

To edit the configuration file, see the instructions at R-Pi_ConfigurationFile.

File format

The format is "property=value" where value is an integer. You may specify only one option per line. Comments may be added by starting a line with the '#' character.

Here is an example file

# Set stdv mode to PAL (as used in Europe)
sdtv_mode=2
# Force the monitor to HDMI mode so that sound will be sent over HDMI cable
hdmi_drive=2
# Set monitor mode to DMT
hdmi_group=2
# Set monitor resolution to 1024x768 XGA 60Hz (HDMI_DMT_XGA_60)
hdmi_mode=16
# Make display smaller to stop text spilling off the screen
overscan_left=20
overscan_right=12
overscan_top=10
overscan_bottom=10

And here is another example file, containing extended documentation of features: link.

Video mode configuration

Video mode options

sdtv_mode defines the TV standard for composite output (default=0)

sdtv_mode=0    Normal NTSC
sdtv_mode=1    Japanese version of NTSC – no pedestal
sdtv_mode=2    Normal PAL
sdtv_mode=3    Brazilian version of PAL – 525/60 rather than 625/50, different subcarrier

sdtv_aspect defines the aspect ratio for composite output (default=1)

sdtv_aspect=1  4:3
sdtv_aspect=2  14:9
sdtv_aspect=3  16:9

sdtv_disable_colourburst disables colour burst on composite output. The picture will be monochrome, but possibly sharper

sdtv_disable_colourburst=1  colour burst is disabled

hdmi_safe Use "safe mode" settings to try to boot with maximum hdmi compatibility. This is the same as the combination of: hdmi_force_hotplug=1, config_hdmi_boost=4, hdmi_group=1, hdmi_mode=1, disable_overscan=0

 hdmi_safe=1

hdmi_ignore_edid Enables the ignoring of EDID/display data if your display is a crappy Chinese one

 hdmi_ignore_edid=0xa5000080

hdmi_edid_file when set to 1, will read the edid data from the edid.dat file instead of from the monitor.[1]

hdmi_edid_file=1

hdmi_force_edid_audio Pretends all audio formats are supported by display, allowing passthrough of DTS/AC3 even when not reported as supported.

 hdmi_force_edid_audio=1

edid_format_smart_match Allow fuzzy matching of modes described in edid. Picks the standard mode with matching resolution and closest framerate even if blanking is wrong.

 edid_format_smart_match=1

hdmi_ignore_cec_init Doesn't sent initial active source message. Avoids bringing (CEC enabled) TV out of standby and channel switch when rebooting.

 hdmi_ignore_cec_init=1

hdmi_ignore_cec Pretends CEC is not supported at all by TV. No CEC functions will be supported.

 hdmi_ignore_cec=1

hdmi_force_hotplug Pretends HDMI hotplug signal is asserted so it appears a HDMI display is attached

 hdmi_force_hotplug=1 Use HDMI mode even if no HDMI monitor is detected

hdmi_ignore_hotplug Pretends HDMI hotplug signal is not asserted so it appears a HDMI display is not attached

 hdmi_ignore_hotplug=1 Use composite mode even if HDMI monitor is detected

hdmi_drive chooses between HDMI and DVI modes

 hdmi_drive=1 Normal DVI mode (No sound)
 hdmi_drive=2 Normal HDMI mode (Sound will be sent if supported and enabled)

hdmi_group defines the HDMI type

Not specifying the group, or setting to 0 will use the preferred group reported by the edid.

hdmi_group=1   CEA
hdmi_group=2   DMT

hdmi_mode defines screen resolution in CEA or DMT format

These values are valid if hdmi_group=1 (CEA)
hdmi_mode=1    VGA
hdmi_mode=2    480p  60Hz
hdmi_mode=3    480p  60Hz  H
hdmi_mode=4    720p  60Hz
hdmi_mode=5    1080i 60Hz
hdmi_mode=6    480i  60Hz
hdmi_mode=7    480i  60Hz  H
hdmi_mode=8    240p  60Hz
hdmi_mode=9    240p  60Hz  H
hdmi_mode=10   480i  60Hz  4x
hdmi_mode=11   480i  60Hz  4x H
hdmi_mode=12   240p  60Hz  4x
hdmi_mode=13   240p  60Hz  4x H
hdmi_mode=14   480p  60Hz  2x
hdmi_mode=15   480p  60Hz  2x H
hdmi_mode=16   1080p 60Hz
hdmi_mode=17   576p  50Hz
hdmi_mode=18   576p  50Hz  H
hdmi_mode=19   720p  50Hz
hdmi_mode=20   1080i 50Hz
hdmi_mode=21   576i  50Hz
hdmi_mode=22   576i  50Hz  H
hdmi_mode=23   288p  50Hz
hdmi_mode=24   288p  50Hz  H
hdmi_mode=25   576i  50Hz  4x
hdmi_mode=26   576i  50Hz  4x H
hdmi_mode=27   288p  50Hz  4x
hdmi_mode=28   288p  50Hz  4x H
hdmi_mode=29   576p  50Hz  2x
hdmi_mode=30   576p  50Hz  2x H
hdmi_mode=31   1080p 50Hz
hdmi_mode=32   1080p 24Hz
hdmi_mode=33   1080p 25Hz
hdmi_mode=34   1080p 30Hz
hdmi_mode=35   480p  60Hz  4x
hdmi_mode=36   480p  60Hz  4xH
hdmi_mode=37   576p  50Hz  4x
hdmi_mode=38   576p  50Hz  4x H
hdmi_mode=39   1080i 50Hz  reduced blanking
hdmi_mode=40   1080i 100Hz
hdmi_mode=41   720p  100Hz
hdmi_mode=42   576p  100Hz
hdmi_mode=43   576p  100Hz H
hdmi_mode=44   576i  100Hz
hdmi_mode=45   576i  100Hz H
hdmi_mode=46   1080i 120Hz
hdmi_mode=47   720p  120Hz
hdmi_mode=48   480p  120Hz
hdmi_mode=49   480p  120Hz H
hdmi_mode=50   480i  120Hz
hdmi_mode=51   480i  120Hz H
hdmi_mode=52   576p  200Hz
hdmi_mode=53   576p  200Hz H
hdmi_mode=54   576i  200Hz
hdmi_mode=55   576i  200Hz H
hdmi_mode=56   480p  240Hz
hdmi_mode=57   480p  240Hz H
hdmi_mode=58   480i  240Hz
hdmi_mode=59   480i  240Hz H
H means 16:9 variant (of a normally 4:3 mode).
2x means pixel doubled (i.e. higher clock rate, with each pixel repeated twice)
4x means pixel quadrupled (i.e. higher clock rate, with each pixel repeated four times)
These values are valid if hdmi_group=2 (DMT)
hdmi_mode=1    640x350   85Hz
hdmi_mode=2    640x400   85Hz
hdmi_mode=3    720x400   85Hz
hdmi_mode=4    640x480   60Hz
hdmi_mode=5    640x480   72Hz
hdmi_mode=6    640x480   75Hz
hdmi_mode=7    640x480   85Hz
hdmi_mode=8    800x600   56Hz
hdmi_mode=9    800x600   60Hz
hdmi_mode=10   800x600   72Hz
hdmi_mode=11   800x600   75Hz
hdmi_mode=12   800x600   85Hz
hdmi_mode=13   800x600   120Hz
hdmi_mode=14   848x480   60Hz
hdmi_mode=15   1024x768  43Hz  DO NOT USE
hdmi_mode=16   1024x768  60Hz
hdmi_mode=17   1024x768  70Hz
hdmi_mode=18   1024x768  75Hz
hdmi_mode=19   1024x768  85Hz
hdmi_mode=20   1024x768  120Hz
hdmi_mode=21   1152x864  75Hz
hdmi_mode=22   1280x768        reduced blanking
hdmi_mode=23   1280x768  60Hz
hdmi_mode=24   1280x768  75Hz
hdmi_mode=25   1280x768  85Hz
hdmi_mode=26   1280x768  120Hz reduced blanking
hdmi_mode=27   1280x800        reduced blanking
hdmi_mode=28   1280x800  60Hz
hdmi_mode=29   1280x800  75Hz
hdmi_mode=30   1280x800  85Hz
hdmi_mode=31   1280x800  120Hz reduced blanking
hdmi_mode=32   1280x960  60Hz
hdmi_mode=33   1280x960  85Hz
hdmi_mode=34   1280x960  120Hz reduced blanking
hdmi_mode=35   1280x1024 60Hz
hdmi_mode=36   1280x1024 75Hz
hdmi_mode=37   1280x1024 85Hz
hdmi_mode=38   1280x1024 120Hz reduced blanking
hdmi_mode=39   1360x768  60Hz
hdmi_mode=40   1360x768  120Hz reduced blanking
hdmi_mode=41   1400x1050       reduced blanking
hdmi_mode=42   1400x1050 60Hz
hdmi_mode=43   1400x1050 75Hz
hdmi_mode=44   1400x1050 85Hz
hdmi_mode=45   1400x1050 120Hz reduced blanking
hdmi_mode=46   1440x900        reduced blanking
hdmi_mode=47   1440x900  60Hz
hdmi_mode=48   1440x900  75Hz
hdmi_mode=49   1440x900  85Hz
hdmi_mode=50   1440x900  120Hz reduced blanking
hdmi_mode=51   1600x1200 60Hz
hdmi_mode=52   1600x1200 65Hz
hdmi_mode=53   1600x1200 70Hz
hdmi_mode=54   1600x1200 75Hz
hdmi_mode=55   1600x1200 85Hz
hdmi_mode=56   1600x1200 120Hz reduced blanking
hdmi_mode=57   1680x1050       reduced blanking
hdmi_mode=58   1680x1050 60Hz
hdmi_mode=59   1680x1050 75Hz
hdmi_mode=60   1680x1050 85Hz
hdmi_mode=61   1680x1050 120Hz reduced blanking
hdmi_mode=62   1792x1344 60Hz
hdmi_mode=63   1792x1344 75Hz
hdmi_mode=64   1792x1344 120Hz reduced blanking
hdmi_mode=65   1856x1392 60Hz
hdmi_mode=66   1856x1392 75Hz
hdmi_mode=67   1856x1392 120Hz reduced blanking
hdmi_mode=68   1920x1200       reduced blanking
hdmi_mode=69   1920x1200 60Hz
hdmi_mode=70   1920x1200 75Hz
hdmi_mode=71   1920x1200 85Hz
hdmi_mode=72   1920x1200 120Hz reduced blanking
hdmi_mode=73   1920x1440 60Hz
hdmi_mode=74   1920x1440 75Hz
hdmi_mode=75   1920x1440 120Hz reduced blanking
hdmi_mode=76   2560x1600       reduced blanking
hdmi_mode=77   2560x1600 60Hz
hdmi_mode=78   2560x1600 75Hz
hdmi_mode=79   2560x1600 85Hz
hdmi_mode=80   2560x1600 120Hz reduced blanking
hdmi_mode=81   1366x768  60Hz
hdmi_mode=82   1080p     60Hz
hdmi_mode=83   1600x900        reduced blanking
hdmi_mode=84   2048x1152       reduced blanking
hdmi_mode=85   720p      60Hz
hdmi_mode=86   1366x768        reduced blanking

overscan_left number of pixels to skip on left

overscan_right number of pixels to skip on right

overscan_top number of pixels to skip on top

overscan_bottom number of pixels to skip on bottom

framebuffer_width console framebuffer width in pixels. Default is display width minus overscan.

framebuffer_height console framebuffer height in pixels. Default is display height minus overscan.

framebuffer_depth console framebuffer depth in bits per pixel. Default is 16. 8bit is valid, but default RGB palette makes an unreadable screen. 24bit looks better but has corruption issues as of 20120615. 32bit has no corruption issues but needs framebuffer_ignore_alpha=1 and shows the wrong colors as of 20120615.

framebuffer_ignore_alpha set to 1 to disable alpha channel. Helps with 32bit.

test_mode enable test sound/image during boot for manufacturing test.

disable_l2cache disable arm access to GPU's L2 cache. Needs corresponding L2 disabled kernel. Default is 0.

disable_overscan set to 1 to disable overscan.

config_hdmi_boost configure the signal strength of the HDMI interface. Default is 0. Try 4 if you have interference issues with hdmi. 7 is the maximum.

display_rotate rotates the display clockwise on the screen (default=0)

display_rotate=0  Normal
display_rotate=1  90 degrees
display_rotate=2  180 degrees
display_rotate=3  270 degrees
  • Crashes my RPI before Linux boots if set to "1" -- REW 20120913.

Which values are valid for my monitor?

Your HDMI monitor may support only a limited set of formats. To find out which formats are supported, use the following method.

  • Set the output format to VGA 60Hz (hdmi_group=1 hdmi_mode=1) and boot up the Raspberry Pi
  • Enter the following command to give a list of CEA supported modes
/opt/vc/bin/tvservice -m CEA
  • Enter the following command to give a list of DMT supported modes
/opt/vc/bin/tvservice -m DMT
  • Enter the following command to show your current state
/opt/vc/bin/tvservice -s
  • Enter the following commands to dump more detailed information from your monitor
/opt/vc/bin/tvservice -d edid.dat
/opt/vc/bin/edidparser edid.dat

The edid.dat should also be provided when troubleshooting problems with the default HDMI mode

Licensed Codecs

Hardware decoding of additional codecs can be enabled by purchasing a license that is locked to the CPU serial number of your Raspberry Pi.

decode_MPG2 License key to allow hardware MPEG-2 decoding.

 decode_MPG2=0x12345678

decode_WVC1 License key to allow hardware VC-1 decoding.

 decode_WVC1=0x12345678

License setup for SD-card sharing between multiple Pis. Maximum of 8 licenses at once.

 decode_XXXX=0x12345678,0xabcdabcd,0x87654321,...

Boot options

disable_commandline_tags stop start.elf from filling in ATAGS (memory from 0x100) before launching kernel

cmdline (string) command line parameters. Can be used instead of cmdline.txt file

kernel (string) alternative name to use when loading kernel. Default "kernel.img"

kernel_address address to load kernel.img file at

ramfsfile (string) ramfs file to load

ramfsaddr address to load ramfs file at

initramfs (string address) ramfs file and adress to load it at (it's like ramfsfile+ramfsaddr in one option). NOTE: this option uses different syntax than all other options - you should not use "=" character here. Example:

initramfs initramf.gz 0x00800000

device_tree_address address to load device_tree at

init_uart_baud initial uart baud rate. Default 115200

init_uart_clock initial uart clock. Default 3000000 (3Mhz)

init_emmc_clock initial emmc clock. Default 50000000 (50MHz)

boot_delay wait for given number of seconds in start.elf before loading kernel. delay = 1000 * boot_delay + boot_delay_ms. Default 1

boot_delay_ms wait for given number of milliseconds in start.elf before loading kernel. Default 0

avoid_safe_mode if set to 1, safe_mode boot won't be enabled. Default 0

Overclocking configuration

WARNING: Setting any of the parameters which overvolt your Raspberry Pi will set a permanent bit within the SOC and your warranty is void. So If you care about the warranty do not adjust voltage.

The latest kernel has a cpufreq kernel driver with the "ondemand" governor enabled by default. It has no effect if you have no overclock settings. But when you do, the arm frequency will vary with processor load. Non default values are only used when needed accourding to the used governor. You can adjust the minimum values with the *_min config options or disable dynamic clocking with force_turbo=1. [2]

Overclock and overvoltage will be disabled at runtime when the SoC reaches 85°C to cool it down . You should not hit the limit, even with maximum settings at 25°C ambient temperature. [3]

Also at your own risk you can try overscan settings from our wiki. These were posted on the forum and are not confimed to work.

Overclocking options

Option Description
arm_freq Frequency of ARM in MHz. Default 700
gpu_freq Sets core_freq, h264_freq, isp_freq, v3d_freq together. Default 250
core_freq Frequency of GPU processor core in MHz. It have an impact on ARM performance since it drives L2 cache. Default 250
h264_freq Frequency of hardware video block in MHz. Default 250
isp_freq Frequency of image sensor pipeline block in MHz. Default 250
v3d_freq Frequency of 3D block in MHz. Default 250
avoid_pwm_pll Unlink core_freq from the rest of the gpu. Can cause low quality analog audio, which should be fixed with latest firmware. Default 0
sdram_freq Frequency of SDRAM in MHz. Default 400
over_voltage ARM/GPU core voltage adjust. [-16,8] equates to [0.8V,1.4V] with 0.025V steps. force_turbo will allow values higher than 6. Default 0 (1.2V) [4]
over_voltage_sdram Sets over_voltage_sdram_c, over_voltage_sdram_i, over_voltage_sdram_p together
over_voltage_sdram_c SDRAM controller voltage adjust. [-16,8] equates to [0.8V,1.4V] with 0.025V steps. Default 0 (1.2V) [4]
over_voltage_sdram_i SDRAM I/O voltage adjust. [-16,8] equates to [0.8V,1.4V] with 0.025V steps. Default 0 (1.2V)[4]
over_voltage_sdram_p SDRAM phy voltage adjust. [-16,8] equates to [0.8V,1.4V] with 0.025V steps. Default 0 (1.2V)[4]
force_turbo Disables dynamic cpufreq driver and minimum settings below. Enables h264/v3d/isp overclock options. Default 0
arm_freq_min Minimum value of arm_freq used for dynamic clocking. Default 700
core_freq_min Minimum value of core_freq used for dynamic clocking. Default 250
sdram_freq_min Minimum value of sdram_freq used for dynamic clocking. Default 400
over_voltage_min Minimum value of over_voltage used for dynamic clocking. Default 0
temp_limit Overheat protection. Sets clocks and voltages to default when the SoC reaches this Celsius value. Setting this higher than default voids warranty. Default 85

force_turbo mode

 force_turbo=0

enables dynamic clocks and voltage for the ARM core, GPU core and SDRAM. When busy, ARM frequency go up to "arm_freq" and down to "arm_freq_min" on idle. "core_freq", "sdram_freq" and "over_voltage" behave the same. "over_voltage" is limited to 6 (1.35V). Non default values for the h264/v3d/isp parts are ignored.

 force_turbo=1

disables dynamic clocking, so all frequencies and voltages stay high. Overclocking of h264/v3d/isp GPU parts is allowed as well as setting "over_voltage" to 8 (1.4V). [5]

Clocks relationship

The GPU core, h264, v3d and isp share a PLL, so need to have related frequencies. ARM, SDRAM and GPU each have their own PLLs and can have unrelated frequencies[6].

The following is not necessary with "avoid_pwm_pll=1".

For firmware before 5. Sep. 2012

PLL will be set to:
pll_freq = core_freq * 2^n, for smallest n satisfying pll_freq > 600MHz.

GPU core, h264, v3d and isp should all be integer divisors of pll_freq. So core_freq=480 sets pll_freq=960. That would allow a v3d_freq/h264_freq/v3d_freq of 320 with an integer divider of 3.

For firmware after 5. Sep. 2012

The latest firmware has a different behaviour [7].

pll_freq = floor(2400 / (2 * core_freq)) * (2 * core_freq)
gpu_freq = pll_freq / [even number]

The effective gpu_freq is automatically rounded to nearest even integer, so asking for core_freq=500 and gpu_freq=300 will result in divisor of 2000/300 = 6.666 => 6 and so 333.33MHz.

Tested values

The following table shows some successfull attempts of overclocking, which can be used for orientation. These settings may not work on every device and can shorten the lifetime of the Broadcom SoC.

Warning: Warranty will be voided if overvoltage is used!

arm_freq gpu_freq core_freq h264_freq isp_freq v3d_freq sdram_freq over_voltage over_voltage_sdram
800
900 275 500
900 450 450
930 350 500
1000 500 500 6
1050 6
1150 500 600 8

There are reports that Hynix RAM is not as good as Samsung RAM for overclocking.

other options

The following strings were extracted from the GPU bootcode, and look like they might be options. There is no guarantee that they ARE options for rpi_config.txt. This list is intended to contain just the options not documented above, but may contain oversights. If you see an option listed that is documented above, please remove it from this list. If you have some time on your hands you might be able to figure out what some of these options do, and document them above.



add_device
alloc_logical_address
aplay_
ap_output_control
ap_output_post_processing
arec_
arm_control
arm_freq
arm_freq_min
audio_
audio_close
audio_dummy
audioplus_post_proc
audioplus_tmp_buf
audio_properties
audio_server
avoid_edid_fuzzy_match
avoid_pwm_pll
avoid_safe_mode
backlight_dummy
bmpdec_open
bmp_tmp
boot_delay
boot_signing_enable
boot_signing_key0
boot_signing_key1
boot_signing_key2
boot_signing_key3
boot_signing_key_enable
cache_flush
cec_init
cec_osd_name
cec_ready
change_mode
check_ksv_list_handler
check_mask
codec_enabled
config_hdmi_boost
config_hdmi_preemphasis
consumed_input
copy_file
core_freq
core_freq_min
current_limit_override
current_logging_level
ddc_read
deregister_all
deregister_command
device_tree
device_tree_address
disable_commandline_tags
disable_copy_protect
disable_l2cache
disable_l2cache_writealloc
disable_overscan
disable_pvt
disable_splash
disk_notify
display_rotate
display_update
dispmanx_resource
dma_transfer_xfers
edid_content_type
egl_platform_switch
emit_output
enable_copy_protect
enable_hdmi_status
end_of_list
exchange_ksvs_handler
fail_on_check
filesys_close_disk_raw
filesys_open_disk_raw
filter_description
filter_task_name
force_turbo
framebuffer_align
framebuffer_depth
framebuffer_height
framebuffer_ignore_alpha
framebuffer_width
frequency_deviation_ppm
fs_close_disk
fs_open_disk
fsys_drvtbl
fsys_sem
g_camera_pool_size
g_camera_pool_start
g_chunk_size
g_codec_pool_size
g_codec_pool_start
gencmd_file
general_encrypted_handler
get_audio_plugin_func_table
get_img_dec_func_table
get_img_enc_func_table
get_info
get_lcd_info
get_logical_address
get_physical_address
get_play_buffer_driver_func_table
get_property
get_record_buffer_driver_func_table
get_state
get_topology
get_vendor_id
get_vid_dec_func_table
get_vid_enc_func_table
'_     g&l
g_legacy_blocks
g_mgr
g_num_chunks
g_num_chunks_offline
g_offline_map
gpio_pads0
gpio_pads2
gpio_pads3
gpio_pads4
gpio_pads5
gpu_freq
gpu_freq_min
g_smallallocs
g_smallallocs_free_handle
g_smallallocs_num_handles
g_sysman_domains
g_tasklogend
g_tasklogstart
h264_freq
h264_freq_min
handle_error_
haud_proc
hdcp_off
hdcp_on
hdcp_set_key
hdcp_set_revoke_list
hdmi_boost
hdmi_clock_change_limit
hdmi_clock_spreading
hdmi_control_gpio
hdmi_drive
hdmi_edid_file
hdmi_force_edid_audio
hdmi_force_hotplug
hdmi_get_av_latency
hdmi_group
hdmi_ignore_cec
hdmi_ignore_cec_init
hdmi_ignore_edid
hdmi_ignore_hotplug
hdmi_mode
hdmi_ntsc_freqs
hdmi_pixel_clock_type
hdmi_pixel_encoding
hdmi_pixel_freq_limit
hdmi_power_on_best
hdmi_power_on_explicit
hdmi_power_on_preferred
hdmi_query_audio_support
hdmi_query_mode_support
hdmi_query_supported_modes
hdmi_safe
hdmi_set_display_options
hdmi_set_spd
hp_detect
hvs_swap_red_blue
imageconv_stats
init_emmc_clock
init_uart_baud
init_uart_clock
inuse_notify
isp_freq
isp_freq_min
jpe_exif
kernel_address
kernel_old
led_control
led_gpio
logging_force
logging_level
log_level_overrides
mask_3d
max_non_pll_freq
max_sdram_freq
mbox_read
measure_clock
measure_temp
measure_volts
mem_timo
message_handler
modulation_frequency_hz
multicore_sync
_mwhsegment_chain
^_$n
never_over_voltage
__o2
otp_dump
otp_key
overscan_bottom
overscan_left
overscan_right
overscan_scale
overscan_top
over_voltage
over_voltage_min
over_voltage_sdram
over_voltage_sdram_c
over_voltage_sdram_c_min
over_voltage_sdram_i
over_voltage_sdram_i_min
over_voltage_sdram_min
over_voltage_sdram_p
over_voltage_sdram_p_min
play_local_close
play_local_flush
pm_get_status
pm_set_policy
pm_show_stats
pm_start_logging
pm_stop_logging
poll_address
powerman_check_for_pvt_cal
powerman_initialise
powerman_process_statemachine
powerman_stop_logging
power_off
program_board_rev
program_bootrom
program_serial_number
program_serial_random
raspberrypi_linux
reaper_sem
register_all
register_command
release_logical_address
render_bar
resource_logging
ril_create
safe_mode
sdcard_control
sdram_c
sdram_freq
sdram_freq_min
sdram_i
sdram_p
sdtv_aspect
sdtv_disable_colourburst
sdtv_mode
sdtv_power_on
send_message
set_attached
set_backlight
set_bus_arbiter_mode
set_logging
set_logical_address
set_osd_name
set_passive
set_property
set_vendor_id
set_vll_dir
show_info
spread_spectrum_enable
start_3d_mode
start_mode
stop_3d_mode
sus_is_enabled
sus_status
sus_stop_test_thread
sus_suspend
sysman_initialise
tasklog_cpu_count
tasklogend_offset
tasklogstart_offset
temp_check
temp_limit
test_mode
test_mode_start
test_mode_stop
threadx_open_disk
total_checks
tv_server
_tx_thread_created_next_offset
_tx_thread_created_ptr
_tx_thread_name_offset
usb_control_dummy
v3d_freq
v3d_freq_min
validating_handler
vchiq_core
vchiq_core_msg
vchiq_shim
vchiq_vc
vchiu_queue_init
vcos_build_date
vcos_build_hostname
vcos_build_time
vcos_build_version
vcos_cmd
vcos_cmd_entries
vcos_llthread_size
vc_pool_max_handles
vc_pool_remote
vctest_get
vctest_memmap
vctest_set
vctest_start
vctest_stop
wait_for_active_rx_handler
wait_for_ksv_list_handler

References

  1. http://www.raspberrypi.org/phpBB3/viewtopic.php?p=173430#p173430
  2. http://www.raspberrypi.org/phpBB3/viewtopic.php?p=169726#p169726
  3. http://www.raspberrypi.org/phpBB3/viewtopic.php?f=29&t=11579#p169872
  4. 4.0 4.1 4.2 4.3 What this means is that you can specify -16 and expect about 0.8V as the GPU/core voltage. This is 0.4V below the normal value of 1.2. If you specify 16, you'd get 0.4V ABOVE the normal value of 1.2V, or 1.6V. The fact that someone carefully specified "8" and "1.4V" as the upper limit in the examples leads me to think that it is likely to shorten the life of your raspberry pi significantly if you would specify values above "8". So: don't specify values above zero, but if you do, don't go above 8.
  5. http://www.raspberrypi.org/phpBB3/viewtopic.php?f=29&t=6201&sid=852d546291ae711ffcd8bf23d3214581&start=325#p170793
  6. http://www.raspberrypi.org/phpBB3/viewtopic.php?f=29&t=6201&start=125#p126308
  7. http://www.raspberrypi.org/phpBB3/viewtopic.php?f=29&t=6201&start=275#p168042