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  1. uuuuuu################################################################################
  2. ##  Raspberry Pi Configuration Settings
  3. ##
  4. ##  Revision 16, 2013/06/22
  5. ##
  6. ##  Details taken from the eLinux wiki
  7. ##  For up-to-date information please refer to wiki page.
  8. ##
  9. ##  Wiki Location : http://elinux.org/RPiconfig
  10. ##
  11. ##
  12. ##  Description:
  13. ##    Details of each setting are described with each section that begins with
  14. ##    a double hashed comment ('##')
  15. ##    It is up to the user to remove the single hashed comment ('#') from each
  16. ##    option they want to enable, and to set the specific value of that option.
  17. ##
  18. ##  Overclock settings will be disabled at runtime if the SoC reaches temp_limit
  19. ##
  20. ################################################################################
  21.  
  22. ################################################################################
  23. ##  Standard Definition Video Settings
  24. ################################################################################
  25.  
  26. ## sdtv_mode
  27. ##     defines the TV standard for composite output
  28. ##
  29. ##     Value    Description
  30. ##     -------------------------------------------------------------------------
  31. ##     0        Normal NTSC (Default)
  32. ##     1        Japanese version of NTSC - no pedestal
  33. ##     2        Normal PAL
  34. ##     3        Brazilian version of PAL - 525/60 rather than 625/50, different
  35. ##              subcarrier
  36. ##
  37. #sdtv_mode=0
  38.  
  39. ## sdtv_aspect
  40. ##     defines the aspect ratio for composite output
  41. ##
  42. ##     Value    Description
  43. ##     -------------------------------------------------------------------------
  44. ##     1        4:3 (Default)
  45. ##     2        14:9
  46. ##     3        16:9
  47. ##
  48. #sdtv_aspect=1
  49.  
  50. ## sdtv_disable_colourburst
  51. ##     Disables colour burst on composite output. The picture will be
  52. ##     monochrome, but possibly sharper
  53. ##
  54. ##     Value    Description
  55. ##     -------------------------------------------------------------------------
  56. ##     0        Colour burst is enabled (Default)
  57. ##     1        Colour burst is disabled
  58. ##
  59. #sdtv_disable_colourburst=1
  60.  
  61. ################################################################################
  62. ##  High Definition Video Settings
  63. ################################################################################
  64.  
  65. ## hdmi_safe
  66. ##     Use "safe mode" settings to try to boot with maximum hdmi compatibility.
  67. ##
  68. ##     Value    Description
  69. ##     -------------------------------------------------------------------------
  70. ##     0        Disabled (Default)
  71. ##     1        Enabled (this does: hdmi_force_hotplug=1,
  72. ##                                  hdmi_ignore_edid=0xa5000080,
  73. ##                                  config_hdmi_boost=4, hdmi_group=2,
  74. ##                                  hdmi_mode=4, disable_overscan=1,
  75. ##                                  overscan_left=10, overscan_right=10,
  76. ##                                  overscan_top=30, overscan_bottom=30)
  77. ##
  78. #hdmi_safe=0
  79.  
  80. ## hdmi_force_hotplug
  81. ##     Pretends HDMI hotplug signal is asserted so it appears a HDMI display
  82. ##     is attached
  83. ##
  84. ##     Value    Description
  85. ##     -------------------------------------------------------------------------
  86. ##     0        Disabled (Default)
  87. ##     1        Use HDMI mode even if no HDMI monitor is detected
  88. ##
  89. #hdmi_force_hotplug=1
  90.  
  91. ## hdmi_ignore_hotplug
  92. ##     Pretends HDMI hotplug signal is not asserted so it appears a HDMI
  93. ##     display is not attached
  94. ##
  95. ##     Value    Description
  96. ##     -------------------------------------------------------------------------
  97. ##     0        Disabled (Default)
  98. ##     1        Use composite mode even if HDMI monitor is detected
  99. ##
  100. #hdmi_ignore_hotplug=1
  101.  
  102. ## hdmi_drive
  103. ##     chooses between HDMI and DVI modes
  104. ##
  105. ##     Value    Description
  106. ##     -------------------------------------------------------------------------
  107. ##     1        Normal DVI mode (No sound)
  108. ##     2        Normal HDMI mode (Sound will be sent if supported and enabled)
  109. ##
  110. #hdmi_drive=2
  111.  
  112. ## hdmi_ignore_edid
  113. ##     Enables the ignoring of EDID/display data
  114. ##
  115. #hdmi_ignore_edid=0xa5000080
  116.  
  117. ## hdmi_edid_file
  118. ##     Read the EDID data from the edid.dat file instead of from the attached
  119. ##     device
  120. ##
  121. ##     Value    Description
  122. ##     -------------------------------------------------------------------------
  123. ##     0        Read EDID data from attached device (Default)
  124. ##     1        Read EDID data from edid.txt file
  125. ##
  126. #hdmi_edid_file=1
  127.  
  128. ## hdmi_ignore_edid_audio
  129. ##     Pretends all audio formats are unsupported by display. This means ALSA
  130. ##     will default to analogue.
  131. ##
  132. ##     Value    Description
  133. ##     -------------------------------------------------------------------------
  134. ##     0        Use EDID provided values (Default)
  135. ##     1        Pretend all audio formats are unsupported
  136. ##
  137. #hdmi_ignore_edid_audio=1
  138.  
  139. ## hdmi_force_edid_audio
  140. ##     Pretends all audio formats are supported by display, allowing
  141. ##     passthrough of DTS/AC3 even when not reported as supported.
  142. ##
  143. ##     Value    Description
  144. ##     -------------------------------------------------------------------------
  145. ##     0        Use EDID provided values (Default)
  146. ##     1        Pretend all audio formats are supported
  147. ##
  148. #hdmi_force_edid_audio=1
  149.  
  150. ## hdmi_force_edid_3d
  151. ##     Pretends all CEA modes support 3D even when edid doesn't indicate
  152. ##     support for them.
  153. ##
  154. ##     Value    Description
  155. ##     -------------------------------------------------------------------------
  156. ##     0        Use EDID provided values (Default)
  157. ##     1        Pretend 3D mode is supported
  158. ##
  159. #hdmi_force_edid_3d=1
  160.  
  161. ## avoid_edid_fuzzy_match
  162. ##     Avoid fuzzy matching of modes described in edid.
  163. ##
  164. ##     Value    Description
  165. ##     -------------------------------------------------------------------------
  166. ##     0        Use fuzzy matching (Default)
  167. ##     1        Avoid fuzzy matching
  168. ##
  169. #avoid_edid_fuzzy_match=1
  170.  
  171. ## hdmi_pixel_encoding
  172. ##     Force the pixel encoding mode.
  173. ##     By default it will use the mode requested from edid so shouldn't
  174. ##     need changing.
  175. ##
  176. ##     Value    Description
  177. ##     -------------------------------------------------------------------------
  178. ##     0        Use EDID provided values (Default)
  179. ##     1        RGB limited   (16-235)
  180. ##     2        RGB full      ( 0-255)
  181. ##     3        YCbCr limited (16-235)
  182. ##     4        YCbCr limited ( 0-255)
  183. ##
  184. #hdmi_pixel_encoding=1
  185.  
  186. ## hdmi_group
  187. ##     Defines the HDMI type
  188. ##
  189. ##     Value    Description
  190. ##     -------------------------------------------------------------------------
  191. ##     0        Use the preferred group reported by the edid (Default)
  192. ##     1        CEA
  193. ##     2        DMT
  194. ##
  195. #hdmi_group=2
  196.  
  197. ## hdmi_mode
  198. ##     defines screen resolution in CEA or DMT format
  199. ##
  200. ##     H means 16:9 variant (of a normally 4:3 mode).
  201. ##     2x means pixel doubled (i.e. higher clock rate, with each pixel repeated
  202. ##                                  twice)
  203. ##     4x means pixel quadrupled (i.e. higher clock rate, with each pixel
  204. ##                                     repeated four times)
  205. ##     reduced blanking means fewer bytes are used for blanking within the data
  206. ##                      stream (i.e. lower clock rate, with fewer wasted bytes)
  207. ##
  208. ##     Value    hdmi_group=CEA                  hdmi_group=DMT
  209. ##     -------------------------------------------------------------------------
  210. ##     1        VGA                             640x350   85Hz
  211. ##     2        480p  60Hz                      640x400   85Hz
  212. ##     3        480p  60Hz  H                   720x400   85Hz
  213. ##     4        720p  60Hz                      640x480   60Hz
  214. ##     5        1080i 60Hz                      640x480   72Hz
  215. ##     6        480i  60Hz                      640x480   75Hz
  216. ##     7        480i  60Hz  H                   640x480   85Hz
  217. ##     8        240p  60Hz                      800x600   56Hz
  218. ##     9        240p  60Hz  H                   800x600   60Hz
  219. ##     10       480i  60Hz  4x                  800x600   72Hz
  220. ##     11       480i  60Hz  4x H                800x600   75Hz
  221. ##     12       240p  60Hz  4x                  800x600   85Hz
  222. ##     13       240p  60Hz  4x H                800x600   120Hz
  223. ##     14       480p  60Hz  2x                  848x480   60Hz
  224. ##     15       480p  60Hz  2x H                1024x768  43Hz  DO NOT USE
  225. ##     16       1080p 60Hz                      1024x768  60Hz
  226. ##     17       576p  50Hz                      1024x768  70Hz
  227. ##     18       576p  50Hz  H                   1024x768  75Hz
  228. ##     19       720p  50Hz                      1024x768  85Hz
  229. ##     20       1080i 50Hz                      1024x768  120Hz
  230. ##     21       576i  50Hz                      1152x864  75Hz
  231. ##     22       576i  50Hz  H                   1280x768        reduced blanking
  232. ##     23       288p  50Hz                      1280x768  60Hz
  233. ##     24       288p  50Hz  H                   1280x768  75Hz
  234. ##     25       576i  50Hz  4x                  1280x768  85Hz
  235. ##     26       576i  50Hz  4x H                1280x768  120Hz reduced blanking
  236. ##     27       288p  50Hz  4x                  1280x800        reduced blanking
  237. ##     28       288p  50Hz  4x H                1280x800  60Hz
  238. ##     29       576p  50Hz  2x                  1280x800  75Hz
  239. ##     30       576p  50Hz  2x H                1280x800  85Hz
  240. ##     31       1080p 50Hz                      1280x800  120Hz reduced blanking
  241. ##     32       1080p 24Hz                      1280x960  60Hz
  242. ##     33       1080p 25Hz                      1280x960  85Hz
  243. ##     34       1080p 30Hz                      1280x960  120Hz reduced blanking
  244. ##     35       480p  60Hz  4x                  1280x1024 60Hz
  245. ##     36       480p  60Hz  4x H                1280x1024 75Hz
  246. ##     37       576p  50Hz  4x                  1280x1024 85Hz
  247. ##     38       576p  50Hz  4x H                1280x1024 120Hz reduced blanking
  248. ##     39       1080i 50Hz  reduced blanking    1360x768  60Hz
  249. ##     40       1080i 100Hz                     1360x768  120Hz reduced blanking
  250. ##     41       720p  100Hz                     1400x1050       reduced blanking
  251. ##     42       576p  100Hz                     1400x1050 60Hz
  252. ##     43       576p  100Hz H                   1400x1050 75Hz
  253. ##     44       576i  100Hz                     1400x1050 85Hz
  254. ##     45       576i  100Hz H                   1400x1050 120Hz reduced blanking
  255. ##     46       1080i 120Hz                     1440x900        reduced blanking
  256. ##     47       720p  120Hz                     1440x900  60Hz
  257. ##     48       480p  120Hz                     1440x900  75Hz
  258. ##     49       480p  120Hz H                   1440x900  85Hz
  259. ##     50       480i  120Hz                     1440x900  120Hz reduced blanking
  260. ##     51       480i  120Hz H                   1600x1200 60Hz
  261. ##     52       576p  200Hz                     1600x1200 65Hz
  262. ##     53       576p  200Hz H                   1600x1200 70Hz
  263. ##     54       576i  200Hz                     1600x1200 75Hz
  264. ##     55       576i  200Hz H                   1600x1200 85Hz
  265. ##     56       480p  240Hz                     1600x1200 120Hz reduced blanking
  266. ##     57       480p  240Hz H                   1680x1050       reduced blanking
  267. ##     58       480i  240Hz                     1680x1050 60Hz
  268. ##     59       480i  240Hz H                   1680x1050 75Hz
  269. ##     60                                       1680x1050 85Hz
  270. ##     61                                       1680x1050 120Hz reduced blanking
  271. ##     62                                       1792x1344 60Hz
  272. ##     63                                       1792x1344 75Hz
  273. ##     64                                       1792x1344 120Hz reduced blanking
  274. ##     65                                       1856x1392 60Hz
  275. ##     66                                       1856x1392 75Hz
  276. ##     67                                       1856x1392 120Hz reduced blanking
  277. ##     68                                       1920x1200       reduced blanking
  278. ##     69                                       1920x1200 60Hz
  279. ##     70                                       1920x1200 75Hz
  280. ##     71                                       1920x1200 85Hz
  281. ##     72                                       1920x1200 120Hz reduced blanking
  282. ##     73                                       1920x1440 60Hz
  283. ##     74                                       1920x1440 75Hz
  284. ##     75                                       1920x1440 120Hz reduced blanking
  285. ##     76                                       2560x1600       reduced blanking
  286. ##     77                                       2560x1600 60Hz
  287. ##     78                                       2560x1600 75Hz
  288. ##     79                                       2560x1600 85Hz
  289. ##     80                                       2560x1600 120Hz reduced blanking
  290. ##     81                                       1366x768  60Hz
  291. ##     82                                       1080p     60Hz
  292. ##     83                                       1600x900        reduced blanking
  293. ##     84                                       2048x1152       reduced blanking
  294. ##     85                                       720p      60Hz
  295. ##     86                                       1366x768        reduced blanking
  296. ##
  297. #hdmi_mode=16
  298.  
  299. ## config_hdmi_boost
  300. ##     configure the signal strength of the HDMI interface.
  301. ##
  302. ##     Value    Description
  303. ##     -------------------------------------------------------------------------
  304. ##     0        (Default)
  305. ##     1
  306. ##     2
  307. ##     3
  308. ##     4        Try if you have interference issues with HDMI
  309. ##     5
  310. ##     6
  311. ##     7        Maximum
  312. ##
  313. #config_hdmi_boost=0
  314.  
  315. ## hdmi_ignore_cec_init
  316. ##     Doesn't sent initial active source message.  Avoids bringing
  317. ##     (CEC enabled) TV out of standby and channel switch when rebooting.
  318. ##
  319. ##     Value    Description
  320. ##     -------------------------------------------------------------------------
  321. ##     0        Normal behaviour (Default)
  322. ##     1        Doesn't sent initial active source message
  323. ##
  324. #hdmi_ignore_cec_init=1
  325.  
  326. ## hdmi_ignore_cec
  327. ##     Pretends CEC is not supported at all by TV.
  328. ##     No CEC functions will be supported.
  329. ##
  330. ##     Value    Description
  331. ##     -------------------------------------------------------------------------
  332. ##     0        Normal behaviour (Default)
  333. ##     1        Pretend CEC is not supported by TV
  334. ##
  335. #hdmi_ignore_cec=1
  336.  
  337. ################################################################################
  338. ##  Overscan Video Settings
  339. ################################################################################
  340.  
  341. ## overscan_left
  342. ##     Number of pixels to skip on left
  343. ##
  344. #overscan_left=0
  345.  
  346. ## overscan_right
  347. ##     Number of pixels to skip on right
  348. ##
  349. #overscan_right=0
  350.  
  351. ## overscan_top
  352. ##     Number of pixels to skip on top
  353. ##
  354. #overscan_top=0
  355.  
  356. ## overscan_bottom
  357. ##     Number of pixels to skip on bottom
  358. ##
  359. #overscan_bottom=0
  360.  
  361. ## disable_overscan
  362. ##     Set to 1 to disable overscan
  363. ##
  364. ##     Value    Description
  365. ##     -------------------------------------------------------------------------
  366. ##     0        Overscan Enabled (Default)
  367. ##     1        Overscan Disabled
  368. ##
  369. #disable_overscan=1
  370.  
  371. ################################################################################
  372. ##  Framebuffer Video Settings
  373. ################################################################################
  374.  
  375. ## framebuffer_width
  376. ##     Console framebuffer width in pixels. Default is display width minus
  377. ##     overscan.
  378. ##
  379. #framebuffer_width=0
  380.  
  381. ## framebuffer_height
  382. ##     Console framebuffer height in pixels. Default is display height minus
  383. ##     overscan.
  384. ##
  385. #framebuffer_height=0
  386.  
  387. ## framebuffer_depth
  388. ##     Console framebuffer depth in bits per pixel.
  389. ##
  390. ##     Value    Description
  391. ##     -------------------------------------------------------------------------
  392. ##     8        Valid, but default RGB palette makes an unreadable screen
  393. ##     16       (Default)
  394. ##     24       Looks better but has corruption issues as of 2012/06/15
  395. ##     32       Has no corruption issues but needs framebuffer_ignore_alpha=1
  396. ##              and shows the wrong colors as of 2012/06/15
  397. ##
  398. framebuffer_depth=32
  399.  
  400. ## framebuffer_ignore_alpha
  401. ##     Set to 1 to disable alpha channel. Helps with 32bit.
  402. ##
  403. ##     Value    Description
  404. ##     -------------------------------------------------------------------------
  405. ##     0        Enable Alpha Channel (Default)
  406. ##     1        Disable Alpha Channel
  407. ##
  408. framebuffer_ignore_alpha=1
  409.  
  410. ################################################################################
  411. ##  General Video Settings
  412. ################################################################################
  413.  
  414. ## display_rotate
  415. ##     Rotate the display clockwise or flip the display.
  416. ##     The 90 and 270 degrees rotation options require additional memory on GPU,
  417. ##     so won't work with the 16M GPU split.
  418. ##
  419. ##     Value    Description
  420. ##     -------------------------------------------------------------------------
  421. ##     0        0 degrees (Default)
  422. ##     1        90 degrees
  423. ##     2        180 degrees
  424. ##     3        270 degrees
  425. ##     0x10000  Horizontal flip
  426. ##     0x20000  Vertical flip
  427. ##
  428. #display_rotate=0
  429.  
  430. ## dispmanx_offline
  431. ##     Set to "1" to enable offline compositing
  432. ##
  433. ##     Default 0
  434. ##
  435. #dispmanx_offline=0
  436.  
  437. ################################################################################
  438. ##  Licensed Codecs
  439. ##
  440. ##  Hardware decoding of additional codecs can be enabled by purchasing a
  441. ##  license that is locked to the CPU serial number of your Raspberry Pi.
  442. ##
  443. ##  Up to 8 licenses per CODEC can be specified as a comma seperated list.
  444. ##
  445. ################################################################################
  446.  
  447. ## decode_MPG2
  448. ##     License key to allow hardware MPEG-2 decoding.
  449. ##
  450. #decode_MPG2=0x12345678
  451.  
  452. ## decode_WVC1
  453. ##     License key to allow hardware VC-1 decoding.
  454. ##
  455. #decode_WVC1=0x12345678
  456.  
  457. ################################################################################
  458. ##  Camera Settings
  459. ################################################################################
  460.  
  461. ## start_x
  462. ##     Set to "1" to enable the camera module.
  463. ##
  464. ##     Enabling the camera requires gpu_mem option to be specified with a value
  465. ##     of at least 128.
  466. ##
  467. ##     Default 0
  468. ##
  469. #start_x=0
  470.  
  471. ## disable_camera_led
  472. ##     Turn off the red camera led when recording video or taking a still
  473. ##     picture.
  474. ##
  475. ##     Value    Description
  476. ##     -------------------------------------------------------------------------
  477. ##     0        LED enabled (Default)
  478. ##     1        LED disabled
  479. ##
  480. #disable_camera_led=1
  481.  
  482. ################################################################################
  483. ##  Test Settings
  484. ################################################################################
  485.  
  486. ## test_mode
  487. ##     Enable test sound/image during boot for manufacturing test.
  488. ##
  489. ##     Value    Description
  490. ##     -------------------------------------------------------------------------
  491. ##     0        Disable Test Mod (Default)
  492. ##     1        Enable Test Mode
  493. ##
  494. #test_mode=0
  495.  
  496. ################################################################################
  497. ##  Memory Settings
  498. ################################################################################
  499.  
  500. ## disable_l2cache
  501. ##     Disable arm access to GPU's L2 cache. Needs corresponding L2 disabled
  502. ##     kernel.
  503. ##
  504. ##     Value    Description
  505. ##     -------------------------------------------------------------------------
  506. ##     0        Enable L2 Cache (Default)
  507. ##     1        Disable L2 cache
  508. ##
  509. #disable_l2cache=0
  510.  
  511. ## gpu_mem
  512. ##     GPU memory allocation in MB for all board revisions.
  513. ##
  514. ##     Default 64
  515. ##
  516. #gpu_mem=128
  517.  
  518. ## gpu_mem_256
  519. ##     GPU memory allocation in MB for 256MB board revision.
  520. ##     This option overrides gpu_mem.
  521. ##
  522. #gpu_mem_256=128
  523.  
  524. ## gpu_mem_512
  525. ##     GPU memory allocation in MB for 512MB board revision.
  526. ##     This option overrides gpu_mem.
  527. ##
  528. #gpu_mem_512=128
  529.  
  530. ## disable_pvt
  531. ##     Disable adjusting the refresh rate of RAM every 500ms
  532. ##     (measuring RAM temparature).
  533. ##
  534. #disable_pvt=1
  535.  
  536. ################################################################################
  537. ##  CMA - Dynamic Memory Split
  538. ##
  539. ##  CMA enables dynamic management of the ARM and GPU memory split at runtime.
  540. ##
  541. ##  The following options need to be in cmdline.txt for CMA to work:
  542. ##    coherent_pool=6M smsc95xx.turbo_mode=N
  543. ##
  544. ################################################################################
  545.  
  546. ## cma_lwm
  547. ##     When GPU has less than cma_lwm (low water mark) memory available it
  548. ##     will request some from ARM.
  549. ##
  550. #cma_lwm=16
  551.  
  552. ## cma_hwm
  553. ##     When GPU has more than cma_hwm (high water mark) memory available it
  554. ##     will release some to ARM.
  555. ##
  556. #cma_hwm=32
  557.  
  558. ################################################################################
  559. ##  Boot Option Settings
  560. ################################################################################
  561.  
  562. ## disable_commandline_tags
  563. ##     Stop start.elf from filling in ATAGS (memory from 0x100) before
  564. ##     launching kernel
  565. ##
  566. #disable_commandline_tags=0
  567.  
  568. ## cmdline (string)
  569. ##     Command line parameters. Can be used instead of cmdline.txt file
  570. ##
  571. #cmdline=""
  572.  
  573. ## kernel (string)
  574. ##     Alternative name to use when loading kernel.
  575. ##
  576. #kernel=""
  577.  
  578. ## kernel_address
  579. ##     Address to load kernel.img file at
  580. ##
  581. #kernel_address=0x00000000
  582.  
  583. ## kernel_old
  584. ##     Support loading old kernels
  585. ##
  586. ##     Value    Description
  587. ##     -------------------------------------------------------------------------
  588. ##     0        Disabled (Default)
  589. ##     1        Load kernel at address 0x00000000
  590. ##
  591. #kernel_old=1
  592.  
  593. ## ramfsfile (string)
  594. ##     ramfs file to load
  595. ##
  596. #ramfsfile=""
  597.  
  598. ## ramfsaddr
  599. ##     Address to load ramfs file at
  600. ##
  601. #ramfsaddr=0x00000000
  602.  
  603. ## initramfs (string address)
  604. ##     ramfs file and address to load it at (it's like ramfsfile+ramfsaddr in
  605. ##     one option).
  606. ##
  607. ##     NOTE: this option uses different syntax than all other options - you
  608. ##           should not use "=" character here.
  609. ##
  610. #initramfs initramf.gz 0x00800000
  611.  
  612. ## device_tree_address
  613. ##     Address to load device_tree at
  614. ##
  615. #device_tree_address=0x00000000
  616.  
  617. ## init_uart_baud
  618. ##     Initial uart baud rate.
  619. ##
  620. ##     Default 115200
  621. ##
  622. #init_uart_baud=115200
  623.  
  624. ## init_uart_clock
  625. ##     Initial uart clock.
  626. ##
  627. ##     Default 3000000 (3MHz)
  628. ##
  629. #init_uart_clock=3000000
  630.  
  631. ## init_emmc_clock
  632. ##     Initial emmc clock, increasing this can speedup your SD-card.
  633. ##
  634. ##     Default 100000000 (100mhz)
  635. ##
  636. #init_emmc_clock=100000000
  637.  
  638. ## boot_delay
  639. ##     Wait for a given number of seconds in start.elf before loading
  640. ##     kernel.img.
  641. ##
  642. ##     delay = (1000 * boot_delay) + boot_delay_ms
  643. ##
  644. ##     Default 1
  645. ##
  646. #boot_delay=0
  647.  
  648. ## boot_delay_ms
  649. ##     Wait for a given number of milliseconds in start.elf before loading
  650. ##     kernel.img.
  651. ##
  652. ##     delay = (1000 * boot_delay) + boot_delay_ms
  653. ##
  654. ##     Default 0
  655. ##
  656. #boot_delay_ms=0
  657.  
  658. ## avoid_safe_mode
  659. ##     Adding a jumper between pins 5 & 6 of P1 enables a recovery Safe Mode.
  660. ##     If pins 5 & 6 are used for connecting to external devices (e.g. GPIO),
  661. ##     then this setting can be used to ensure Safe Mode is not triggered.
  662. ##
  663. ##     Value    Description
  664. ##     -------------------------------------------------------------------------
  665. ##     0        Respect Safe Mode input (Default)
  666. ##     1        Ignore Safe Mode input
  667. ##
  668. #avoid_safe_mode=1
  669.  
  670. ## disable_splash
  671. ##     Avoids the rainbow splash screen on boot.
  672. ##
  673. ##     Value    Description
  674. ##     -------------------------------------------------------------------------
  675. ##     0        Splash screen enabled (Default)
  676. ##     1        Splash screen disabled
  677. ##
  678. #disable_splash=1
  679.  
  680. ################################################################################
  681. ##  Overclocking Settings
  682. ##
  683. ##  ARM, SDRAM and GPU each have their own PLLs and can have unrelated
  684. ##  frequencies.
  685. ##
  686. ##  The GPU core, h264, v3d and isp share a PLL, so need to have related
  687. ##  frequencies.
  688. ##  pll_freq = floor(2400 / (2 * core_freq)) * (2 * core_freq)
  689. ##  gpu_freq = pll_freq / [even number]
  690. ##
  691. ##  The effective gpu_freq is automatically rounded to nearest even integer, so
  692. ##  asking for core_freq = 500 and gpu_freq = 300 will result in divisor of
  693. ##  2000/300 = 6.666 => 6 and so 333.33MHz.
  694. ##
  695. ##
  696. ##  Standard Profiles:
  697. ##                  arm_freq    core_freq    sdram_freq    over_voltage
  698. ##     -------------------------------------------------------------------------
  699. ##     None         700         250          400           0
  700. ##     Modest       800         300          400           0
  701. ##     Medium       900         333          450           2
  702. ##     High         950         450          450           6
  703. ##     Turbo        1000        500          500           6
  704. ##
  705. ################################################################################
  706.  
  707. ## force_turbo
  708. ##     Control the kernel "ondemand" governor. It has no effect if no overclock
  709. ##     settings are specified.
  710. ##     May set warrany bit.
  711. ##
  712. ##     Value    Description
  713. ##     -------------------------------------------------------------------------
  714. ##     0        Enable dynamic clocks and voltage for the ARM core, GPU core and
  715. ##              SDRAM (Default).
  716. ##              Overclocking of h264_freq, v3d_freq and isp_freq is ignored.
  717. ##     1        Disable dynamic clocks and voltage for the ARM core, GPU core
  718. ##              and SDRAM.
  719. ##              Overclocking of h264_freq, v3d_freq and isp_freq is allowed.
  720. ##
  721. #force_turbo=0
  722.  
  723. ## initial_turbo
  724. ##     Enables turbo mode from boot for the given value in seconds (up to 60)
  725. ##     or until cpufreq sets a frequency. Can help with sdcard corruption if
  726. ##     overclocked.
  727. ##
  728. ##     Default 0
  729. ##
  730. #initial_turbo=0
  731.  
  732. ## temp_limit
  733. ##     Overheat protection. Sets clocks and voltages to default when the SoC
  734. ##     reaches this Celsius value.
  735. ##     Setting this higher than default voids warranty.
  736. ##
  737. ##     Default 85
  738. ##
  739. #temp_limit=85
  740.  
  741. ## arm_freq
  742. ##     Frequency of ARM in MHz.
  743. ##
  744. ##     Default 700.
  745. ##
  746. #arm_freq=700
  747.  
  748. ## arm_freq_min
  749. ##     Minimum frequency of ARM in MHz (used for dynamic clocking).
  750. ##
  751. ##     Default 700.
  752. ##
  753. #arm_freq_min=700
  754.  
  755. ## gpu_freq
  756. ##     Sets core_freq, h264_freq, isp_freq, v3d_freq together.
  757. ##
  758. ##     Default 250.
  759. ##
  760. #gpu_freq=250
  761.  
  762. ## core_freq
  763. ##     Frequency of GPU processor core in MHz. It has an impact on ARM
  764. ##     performance since it drives L2 cache.
  765. ##
  766. ##     Default 250.
  767. ##
  768. #core_freq=250
  769.  
  770. ## core_freq_min
  771. ##     Minimum frequency of GPU processor core in MHz (used for dynamic
  772. ##     clocking). It has an impact on ARM performance since it drives L2 cache.
  773. ##
  774. ##     Default 250.
  775. ##
  776. #core_freq_min=250
  777.  
  778. ## h264_freq
  779. ##     Frequency of hardware video block in MHz.
  780. ##
  781. ##     Default 250.
  782. ##
  783. #h264_freq=250
  784.  
  785. ## isp_freq
  786. ##     Frequency of image sensor pipeline block in MHz.
  787. ##
  788. ##     Default 250.
  789. ##
  790. #isp_freq=250
  791.  
  792. ## v3d_freq
  793. ##     Frequency of 3D block in MHz.
  794. ##
  795. ##     Default 250.
  796. ##
  797. #v3d_freq=250
  798.  
  799. ## sdram_freq
  800. ##     Frequency of SDRAM in MHz.
  801. ##
  802. ##     Default 400.
  803. ##
  804. #sdram_freq=400
  805.  
  806. ## sdram_freq_min
  807. ##     Minimum frequency of SDRAM in MHz (used for dynamic clocking).
  808. ##
  809. ##     Default 400.
  810. ##
  811. #sdram_freq_min=400
  812.  
  813. ## avoid_pwm_pll
  814. ##     Don't dedicate a pll to PWM audio. This will reduce analogue audio
  815. ##     quality slightly. The spare PLL allows the core_freq to be set
  816. ##     independently from the rest of the gpu allowing more control over
  817. ##     overclocking.
  818. ##
  819. ##     Value    Description
  820. ##     -------------------------------------------------------------------------
  821. ##     0        Linked core_freq (Default)
  822. ##     1        Unlinked core_freq
  823. ##
  824. #avoid_pwm_pll=1
  825.  
  826. ################################################################################
  827. ##  Voltage Settings
  828. ################################################################################
  829.  
  830. ## current_limit_override
  831. ##     Disables SMPS current limit protection. Can help if you are currently
  832. ##     hitting a reboot failure when overclocking too high.
  833. ##     May set warrany bit.
  834. ##
  835. #current_limit_override=0x5A000020
  836.  
  837. ## over_voltage
  838. ##     ARM/GPU core voltage adjust.
  839. ##     May set warrany bit.
  840. ##
  841. ##     Value    Description
  842. ##     -------------------------------------------------------------------------
  843. ##     -16      0.8   V
  844. ##     -15      0.825 V
  845. ##     -14      0.85  V
  846. ##     -13      0.875 V
  847. ##     -12      0.9   V
  848. ##     -11      0.925 V
  849. ##     -10      0.95  V
  850. ##     -9       0.975 V
  851. ##     -8       1.0   V
  852. ##     -7       1.025 V
  853. ##     -6       1.05  V
  854. ##     -5       1.075 V
  855. ##     -4       1.1   V
  856. ##     -3       1.125 V
  857. ##     -2       1.15  V
  858. ##     -1       1.175 V
  859. ##     0        1.2   V (Default)
  860. ##     1        1.225 V
  861. ##     2        1.25  V
  862. ##     3        1.275 V
  863. ##     4        1.3   V
  864. ##     5        1.325 V
  865. ##     6        1.35  V
  866. ##     7        1.375 V (requires force_turbo=1 or current_limit_override)
  867. ##     8        1.4   V (requires force_turbo=1 or current_limit_override)
  868. ##
  869. #over_voltage=0
  870.  
  871. ## over_voltage_min
  872. ##     Minimum ARM/GPU core voltage adjust (used for dynamic clocking).
  873. ##
  874. ##     Value    Description
  875. ##     -------------------------------------------------------------------------
  876. ##     -16      0.8   V
  877. ##     -15      0.825 V
  878. ##     -14      0.85  V
  879. ##     -13      0.875 V
  880. ##     -12      0.9   V
  881. ##     -11      0.925 V
  882. ##     -10      0.95  V
  883. ##     -9       0.975 V
  884. ##     -8       1.0   V
  885. ##     -7       1.025 V
  886. ##     -6       1.05  V
  887. ##     -5       1.075 V
  888. ##     -4       1.1   V
  889. ##     -3       1.125 V
  890. ##     -2       1.15  V
  891. ##     -1       1.175 V
  892. ##     0        1.2   V (Default)
  893. ##     1        1.225 V
  894. ##     2        1.25  V
  895. ##     3        1.275 V
  896. ##     4        1.3   V
  897. ##     5        1.325 V
  898. ##     6        1.35  V
  899. ##     7        1.375 V (requires force_turbo=1)
  900. ##     8        1.4   V (requires force_turbo=1)
  901. ##
  902. #over_voltage_min=0
  903.  
  904. ## over_voltage_sdram
  905. ##     Sets over_voltage_sdram_c, over_voltage_sdram_i, over_voltage_sdram_p
  906. ##     together
  907. ##
  908. ##     Value    Description
  909. ##     -------------------------------------------------------------------------
  910. ##     -16      0.8   V
  911. ##     -15      0.825 V
  912. ##     -14      0.85  V
  913. ##     -13      0.875 V
  914. ##     -12      0.9   V
  915. ##     -11      0.925 V
  916. ##     -10      0.95  V
  917. ##     -9       0.975 V
  918. ##     -8       1.0   V
  919. ##     -7       1.025 V
  920. ##     -6       1.05  V
  921. ##     -5       1.075 V
  922. ##     -4       1.1   V
  923. ##     -3       1.125 V
  924. ##     -2       1.15  V
  925. ##     -1       1.175 V
  926. ##     0        1.2   V (Default)
  927. ##     1        1.225 V
  928. ##     2        1.25  V
  929. ##     3        1.275 V
  930. ##     4        1.3   V
  931. ##     5        1.325 V
  932. ##     6        1.35  V
  933. ##     7        1.375 V
  934. ##     8        1.4   V
  935. ##
  936. #over_voltage_sdram=0
  937.  
  938. ## over_voltage_sdram_c
  939. ##     SDRAM controller voltage adjust.
  940. ##
  941. ##     Value    Description
  942. ##     -------------------------------------------------------------------------
  943. ##     -16      0.8   V
  944. ##     -15      0.825 V
  945. ##     -14      0.85  V
  946. ##     -13      0.875 V
  947. ##     -12      0.9   V
  948. ##     -11      0.925 V
  949. ##     -10      0.95  V
  950. ##     -9       0.975 V
  951. ##     -8       1.0   V
  952. ##     -7       1.025 V
  953. ##     -6       1.05  V
  954. ##     -5       1.075 V
  955. ##     -4       1.1   V
  956. ##     -3       1.125 V
  957. ##     -2       1.15  V
  958. ##     -1       1.175 V
  959. ##     0        1.2   V (Default)
  960. ##     1        1.225 V
  961. ##     2        1.25  V
  962. ##     3        1.275 V
  963. ##     4        1.3   V
  964. ##     5        1.325 V
  965. ##     6        1.35  V
  966. ##     7        1.375 V
  967. ##     8        1.4   V
  968. ##
  969. #over_voltage_sdram_c=0
  970.  
  971. ## over_voltage_sdram_i
  972. ##     SDRAM I/O voltage adjust.
  973. ##
  974. ##     Value    Description
  975. ##     -------------------------------------------------------------------------
  976. ##     -16      0.8   V
  977. ##     -15      0.825 V
  978. ##     -14      0.85  V
  979. ##     -13      0.875 V
  980. ##     -12      0.9   V
  981. ##     -11      0.925 V
  982. ##     -10      0.95  V
  983. ##     -9       0.975 V
  984. ##     -8       1.0   V
  985. ##     -7       1.025 V
  986. ##     -6       1.05  V
  987. ##     -5       1.075 V
  988. ##     -4       1.1   V
  989. ##     -3       1.125 V
  990. ##     -2       1.15  V
  991. ##     -1       1.175 V
  992. ##     0        1.2   V (Default)
  993. ##     1        1.225 V
  994. ##     2        1.25  V
  995. ##     3        1.275 V
  996. ##     4        1.3   V
  997. ##     5        1.325 V
  998. ##     6        1.35  V
  999. ##     7        1.375 V
  1000. ##     8        1.4   V
  1001. ##
  1002. #over_voltage_sdram_i=0
  1003.  
  1004. ## over_voltage_sdram_p
  1005. ##     SDRAM phy voltage adjust.
  1006. ##
  1007. ##     Value    Description
  1008. ##     -------------------------------------------------------------------------
  1009. ##     -16      0.8   V
  1010. ##     -15      0.825 V
  1011. ##     -14      0.85  V
  1012. ##     -13      0.875 V
  1013. ##     -12      0.9   V
  1014. ##     -11      0.925 V
  1015. ##     -10      0.95  V
  1016. ##     -9       0.975 V
  1017. ##     -8       1.0   V
  1018. ##     -7       1.025 V
  1019. ##     -6       1.05  V
  1020. ##     -5       1.075 V
  1021. ##     -4       1.1   V
  1022. ##     -3       1.125 V
  1023. ##     -2       1.15  V
  1024. ##     -1       1.175 V
  1025. ##     0        1.2   V (Default)
  1026. ##     1        1.225 V
  1027. ##     2        1.25  V
  1028. ##     3        1.275 V
  1029. ##     4        1.3   V
  1030. ##     5        1.325 V
  1031. ##     6        1.35  V
  1032. ##     7        1.375 V
  1033. ##     8        1.4   V
  1034. ##
  1035. #over_voltage_sdram_p=0
  1036.  
  1037. ################################################################################
  1038. ##  USB Power
  1039. ################################################################################
  1040.  
  1041. ## max_usb_current
  1042. ##     When set to 1, change the output current limit (for all 4 USB
  1043. ##     ports combined) from 600mA to double that, 1200mA.
  1044. ##
  1045. ##     This option is not available for Model A/B boards.
  1046. ##
  1047. ##     Default 0.
  1048. ##
  1049. #max_usb_current=0
  1050.  
  1051. ################################################################################
  1052. ##  Base Device Tree Parameters
  1053. ################################################################################
  1054.  
  1055. ## audio
  1056. ##     Enable the onboard ALSA audio
  1057. ##
  1058. ##     Default off.
  1059. ##
  1060. #dtparam=audio=off
  1061.  
  1062. ## i2c_arm
  1063. ##     Enable the ARM's i2c interface
  1064. ##
  1065. ##     Default off.
  1066. ##
  1067. #dtparam=i2c_arm=off
  1068.  
  1069. ## i2c_vc
  1070. ##     Enable the i2c interface
  1071. ##
  1072. ##     Usually reserved for the VideoCore processor
  1073. ##
  1074. ##     Default off.
  1075. ##
  1076. #dtparam=i2c_vc=off
  1077.  
  1078. ## i2c_arm_baudrate
  1079. ##     Set the baudrate of the ARM's i2c interface
  1080. ##
  1081. ##     Default 100000.
  1082. ##
  1083. #dtparam=i2c_arm_baudrate=100000
  1084.  
  1085. ## i2c_vc_baudrate
  1086. ##     Set the baudrate of the VideoCore i2c interface
  1087. ##
  1088. ##     Default 100000.
  1089. ##
  1090. #dtparam=i2c_vc_baudrate=100000
  1091.  
  1092. ## i2s
  1093. ##     Set to "on" to enable the i2s interface
  1094. ##
  1095. ##     Default off.
  1096. ##
  1097. #dtparam=i2s=off
  1098.  
  1099. ## spi
  1100. ##     Set to "on" to enable the spi interfaces
  1101. ##
  1102. ##     Default off.
  1103. ##
  1104. #dtparam=spi=off
  1105.  
  1106. ## random
  1107. ##     Set to "on" to enable the hardware random
  1108. ##
  1109. ##     Default off.
  1110. ##
  1111. #dtparam=random=off
  1112.  
  1113. ## uart0
  1114. ##     Set to "off" to disable uart0
  1115. ##
  1116. ##     Default on.
  1117. ##
  1118. #dtparam=uart0=on
  1119.  
  1120. ## watchdog
  1121. ##     Set to "on" to enable the hardware watchdog
  1122. ##
  1123. ##     Default off.
  1124. ##
  1125. #dtparam=watchdog=off
  1126.  
  1127. ## act_led_trigger
  1128. ##     Choose which activity the LED tracks.
  1129. ##
  1130. ##     Use "heartbeat" for a nice load indicator.
  1131. ##
  1132. ##     Default mmc.
  1133. ##
  1134. #dtparam=act_led_trigger=mmc
  1135.  
  1136. ## act_led_activelow
  1137. ##     Set to "on" to invert the sense of the LED
  1138. ##
  1139. ##     Default off.
  1140. ##
  1141. #dtparam=act_led_activelow=off
  1142.  
  1143. ## act_led_gpio
  1144. ##     Set which GPIO to use for the activity LED
  1145. ##
  1146. ##     In case you want to connect it to an external device
  1147. ##
  1148. ##     Default 16 on a non-Plus board, 47 on a Plus or Pi 2.
  1149. ##
  1150. #dtparam=act_led_gpio=47
  1151.  
  1152. ## pwr_led_trigger
  1153. ##     Choose which activity the LED tracks.
  1154. ##
  1155. ##     Use "heartbeat" for a nice load indicator.
  1156. ##
  1157. ##     Not available on Model A/B boards.
  1158. ##
  1159. ##     Default mmc.
  1160. ##
  1161. #dtparam=pwr_led_trigger=mmc
  1162.  
  1163. ## pwr_led_activelow
  1164. ##     Set to "on" to invert the sense of the LED
  1165. ##
  1166. ##     Not available on Model A/B boards.
  1167. ##
  1168. ##     Default off.
  1169. ##
  1170. #dtparam=pwr_led_activelow=off
  1171.  
  1172. ## pwr_led_gpio
  1173. ##     Set which GPIO to use for the PWR LED
  1174. ##
  1175. ##     In case you want to connect it to an external device
  1176. ##
  1177. ##     Not available on Model A/B boards.
  1178. ##
  1179. ##     Default 35.
  1180. ##
  1181. #dtparam=pwr_led_gpio=35
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