From 9a321884379a71b5f0986fdfb97a2b6c5bdccd8a Mon Sep 17 00:00:00 2001 From: Francis Rowe Date: Wed, 03 Sep 2014 14:13:00 -0400 Subject: Libreboot release 6 beta 6. - Added modified builddeb* scripts for Parabola GNU/Linux-libre: buildpac, buildpac-flashrom, buildpac-bucts (courtesy of Noah Vesely) - Documentation: updated all relevant areas to mention use of buildpac* scripts for Parabola users. - Documentation: added information showing how to enable or disable bluetooth on the X60 - MacBook1,1 tested! See ../docs/index.html#macbook11" - Documentation: fixed typo in ../docs/index.html#get_edid_panelname (get-edit changed to get-edid) - Documentation: added ../docs/howtos/x60_lcd_change/ (pics only for now) - Added gcry_serpent and gcry_whirlpool to the GRUB module list in the 'build' script (for luks users) - Libreboot is now based on a new coreboot version from August 23rd, 2014: Merged commits (relates to boards that were already supported in libreboot): - http://review.coreboot.org/#/c/6697/ - http://review.coreboot.org/#/c/6698/ (merged already) - http://review.coreboot.org/#/c/6699/ (merged already) - http://review.coreboot.org/#/c/6696/ (merged already) - http://review.coreboot.org/#/c/6695/ (merged already) - http://review.coreboot.org/#/c/5927/ (merged already) - http://review.coreboot.org/#/c/6717/ (merged already) - http://review.coreboot.org/#/c/6718/ (merged already) - http://review.coreboot.org/#/c/6723/ (merged already) (text-mode patch, might enable memtest. macbook21) - http://review.coreboot.org/#/c/6732/ (MERGED) (remove useless ps/2 keyboard delay from macbook21. already merged) - These were also merged in coreboot (relates to boards that libreboot already supported): - http://review.coreboot.org/#/c/5320/ (merged) - http://review.coreboot.org/#/c/5321/ (merged) - http://review.coreboot.org/#/c/5323/ (merged) - http://review.coreboot.org/#/c/6693/ (merged) - http://review.coreboot.org/#/c/6694/ (merged) - http://review.coreboot.org/#/c/5324/ (merged) - Documentation: removed the section about tft_brightness on X60 (new code makes it obsolete) - Removed all patches from resources/libreboot/patch/ and added new patch: 0000_t60_textmode.git.diff - Updated getcb script and DEBLOB script. - Updated configuration files under resources/libreboot/config/ to accomodate new coreboot version. - Removed grub_serial*.cfg and libreboot_serial*.rom, all configs/rom's are now unified (containing same configuration as serial rom's from before). - Documentation: updated ../docs/index.html#rom to reflect the above. - Updated GRUB to new version from August 14th, 2014. - Unified all grub configurations for all machines to a single grub.cfg under resources/grub/config/ - Updated flashrom to new version from August 20th, 2014 - Added getseabios and builddeps-seabios (builddeps and getall were also updated) - Added instructions to 'buildrom-withgrub' to include bios.bin.elf and vgaroms/vgabios.bin from SeaBIOS inside the ROM. - Added seabios (and sgavgabios) to grub as payload option in menu - Disabled serial output in Memtest86+ (no longer needed) to speed up tests. - MemTest86+ now works properly, it can output on the laptop screen (no serial port needed anymore). - Added getgrubinvaders, builddeps-grubinvaders scripts. Added these to getall and builddeps. - Added GRUB Invaders menu entry in resources/grub/config/grub.cfg - Added rules to builddeps-coreboot to build libpayload with TinyCurses. (added appropriate instructions to cleandeps script). - Commented out lines in resources/grub/config/grub.cfg for loading font/background (not useful anymore, now that GRUB is in text-mode). - Commented out lines in buildrom-withgrub that included backgrounds/fonts (not useful anymore, now that GRUB is in text-mode). - Added resources/utilities/i945-pwm/ (from git://git.mtjm.eu/i945-pwm), for debugging acpi brightness on i945 machines. - Added instructions for it in builddeps, builddeps-i945pwm, builddeb and cleandeps - 'build' script: removed the parts that generated sha512sum manifests (not needed, since release tarballs are GPG-signed) - 'build' script: removed the parts that generated libreboot_meta directory (not needed anymore, since _meta will be hosted in git) - Updated ../docs/index.html#build_meta (and other parts of documentation) to accomodate this change. - Documentation: simplified (refactored) the notes in ../docs/index.html#rom - 'build' script: removed the parts that generated libreboot_bin and added them to a new script: 'build-release' - Documentation: ../docs/index.html#build updated to reflect the above. - Removed 'sudo' from builddeb, builddeb-flashrom, powertop.trisquel6 and builddeb-bucts scripts (assuming that the user has it is a really bad idea). - Added all gcry_* modules to grub (luks/cryptomount): gcry_arcfour gcry_camellia gcry_crc gcry_dsa gcry_md4 gcry_rfc2268 gcry_rmd160 gcry_seed gcry_sha1 gcry_sha512 gcry_twofish gcry_blowfish gcry_cast5 gcry_des gcry_idea gcry_md5 gcry_rijndael gcry_rsa gcry_serpent gcry_sha256 gcry_tiger gcry_whirlpool - Added GNUtoo's list of GRUB modules (includes all of the gcry_* modules above), cryptomount should be working now. - Removed builddeb-bucts and builddeb-flashrom, merged them with builddeb (../docs/index.html updated accordingly) - Removed buildpac-bucts and buildpac-flashrom, merged them with buildpac (../docs/index.html updated accordingly) - Renamed builddeb to deps-trisquel (../docs/index.html updated accordingly) - Renamed buildpac to deps-parabola (../docs/index.html updated accordingly) - Documentation: removed all parts talking about build dependencies, replaced them with links to ../docs/index.html#build_dependencies - Documentation: emphasized more strongly on the documentation, the need to re-build bucts and/or flashrom before flashing a ROM image. - build-release: flashrom, nvramtool, cbfstool and bucts are no longer provided pre-compiled in binary archives, and are now in source form only. (to maximize distro compatibility). - Documentation: added ../docs/howtos/encrypted_trisquel.html showing how to setup a fully encrypted Trisquel installation (including /boot) and boot it from the GRUB payload. - 'build' script: replaced grub.elf assembly instructons, it's now handled by a utility added under resources/utilities/grub-assemble - Moved resources/grub/keymap to resources/utilities/grub-assemble/keymap, and updated that utility to use it - Documentation: removed useless links to pictures of keyboard layouts and unmodified layouts. - Removed all unused fonts from dejavu-fonts-ttf-2.34/ directory - 'buildrom-withgrub' script: updated it to create 2 sets of ROM's for each machine: one with text-mode, one with coreboot framebuffer. - Documentation: updated ../docs/index.html#rom to reflect the above - Deleted unused README and COPYING file from main directory - Removed some rm -rf .git* instructions from the get* scripts and moved them to build-release script - Split up default grub.cfg into 6 parts: extra/{common.cfg,txtmode.cfg,vesafb.cfg} and menuentries/{common.cfg,txtmode.cfg,vesafb.cfg} - buildrom-withgrub script uses these to generate the correct grub.cfg for each type of configuration. - grub_memdisk.cfg (used inside grub.elf) now only loads grub.cfg from cbfs. It no longer enables serial output or sets prefix. (menuentries/common.cfg does instead) - resources/grub/config/extra/common.cfg, added: - insmod instructions to load those modules: nativedisk, ehci, ohci, uhci, usb, usbserial_pl2303, usbserial_ftdi, usbserial_usbdebug - set prefix=(memdisk)/boot/grub - For native graphics (recommended by coreboot wiki): - gfxpayload=keep - terminal_output --append gfxterm - Play a beep on startup: - play 480 440 1 - Documentation: added note about 'fb=false' workaround for text-mode debian-installer (Trisquel net install) to ../docs/howtos/grub_boot_installer.html - Documentation: updated ../docs/howtos/grub_cbfs.html to make it safer (and easier) to follow. --- (limited to 'docs/future/index.html') diff --git a/docs/future/index.html b/docs/future/index.html index 3eee4f7..0bdabf4 100644 --- a/docs/future/index.html +++ b/docs/future/index.html @@ -24,7 +24,7 @@

Development notes

- +

@@ -41,10 +41,6 @@

  • Fast boot
  • LCD panels on i945 - fix incompatible panels
  • Blind X60 - kernel git bisect
    • -
  • X60 native graphics initialization (backlight controls)
    • -
  • T60 native graphics initialization (backlight controls)
    • -
  • i945: 3D fix (based on 5927) for kernel 3.12+ on 5320
    • -
  • i945/x60: coreboot 5927 testing (3D fix for kernel 3.12+ on replay code)
  • i945 X60/T60 VBT implementation (experimental: testing)
  • IntelVbtTool results
  • CPU c-states (X60/T60) buzzing sound on CPU idle
    • @@ -53,33 +49,6 @@
    -

    TODO (bold means high priority)

    - - -

    Back to top of page

    - -
    -

    standard test

    These logs are usually obtained when testing changes related to graphics on i945 (X60 and T60). @@ -289,199 +258,6 @@

    -

    X60 native graphics initialization (with backlight controls)

    -

    - Also check #5320_kernel312fix (to fix 3D on kernel 3.12/higher) -

    -

    - The fix below was done on 5320/6 (from review.coreboot.org) but should work just fine on later versions of 5320. -

    -

    - Native gpu init + backlight controls! (Fn keys). Also confirmed on X60 Tablet (1024x768) and X60 Tablet (1400x1050) -

    -

    - Add backlight controls: in src/mainboard/lenovo/x60/devicetree.cb, change gpu_backlight to 0x879F879E -

    -

    - That's all! This has also been backported into libreboot 5th release (line 1233 in src/mainboard/lenovo/x60/i915io.c). GNUtoo (Denis Carikli) - told me about the register BLC_PWM_CTL and that you could set it to control backlight. I read that address using devmem2 while running the VBIOS:
    - # devmem2 0xe4361254 w -

    -

    - The change is also included in libreboot 6. -

    -

    - When doing this, it gave back that value. The same trick was used to get backlight controls for T60 (see #t60_native_notes). -

    - -

    Further notes

    -

    - Reading 0xe4361254 (address) in Lenovo BIOS always yields FFFFFFFF, even when writing to it (and writing to it doesn't affect brightness controls). - 'mtjm' on IRC found that the buttons (Fn keys) control /sys/class/backlight/acpi_video0 which has no affect on 61254 (BLC_PWM_CTL). He says - intel_backlight has different values and uses the register. devmem2 works, needs checking lspci -vv for where the memory is mapped, - which is different than on coreboot; mtjm found that it was 0xec061254 on his machine (X60 Tablet), and the register value is different too. - This is relevant, because we still don't know how backlight controls are actually handled. We got it working by accident. We need to know more.. -

    -

    - Intel-gpu-tools may prove useful for further debugging: http://cgit.freedesktop.org/xorg/app/intel-gpu-tools/ -

    -

    - mtjm says 0xe4300000 is an MMIO region of the gpu (lspci -vv shows it), 0x61254 (BLC_PWM_CTL) is a documented register. Searching the kernel driver for backlight - shows that in intel_panel.c this register is used (there is an XXX comment about finding the right value, where recent kernels get it from. -

    -

    - What we want to do is calculate a good value, instead of setting it in devicetree.cb. mtjm says about backlight physics: - it has a light source , uses pulse width modulation (PWM) to turn it on/off, dimming is done by spending less time on. - Note: this may not be correct; he says his understanding is based on how the Lenote yeeloong works. -

    -

    - mtjm goes on to say, that the register specifies the frequency used for PWM in its depending on the GPU core frequency, so it - might be possible to calculate it without hardcoded laptop-specific values. Therefore, I am supposed to find out the 'display core frequency' - (mtjm says there might be a register for it; also, it might be in 5320 or the replay code) and the PWM modulation frequency. - https://en.wikipedia.org/wiki/Backlight#Flicker_due_to_backlight_dimming -

    -

    - phcoder (Vladimir Serbinenko) who is author of 5320 (review.coreboot.org) talks about 'duty cycle limit' and 'flickering frequency'. -

    - -

    Back to top of page

    - -
    - -

    T60 native graphics initialization (with backlight controls)

    -

    - Also check #5320_kernel312fix (to fix 3D on kernel 3.12/higher) -

    -

    - The fix below was done on an earlier version of 5345 changeset (review.coreboot.org), but should work on the current version. it is included in libreboot 6 -

    -

    - Add backlight controls: in src/mainboard/lenovo/t60/devicetree.cb, change gpu_backlight to 0x58BF58BE -

    -

    - Hold on! Check ../index.html#get_edid_panelname to know what LCD panel you have. This is important for the next step! -

    - -

    Supported panels

    -

    - ../index.html#supported_t60_list. -

    - -

    - See #lcd_i945_incompatibility. -

    - -

    Back to top of page

    - -
    - -

    i945: 3D fix (based on 5927) for kernel 3.12+ on 5320

    - -

    This needs to be rewritten (or better organized, or deleted?). This is also now included in libreboot 6 (using the proper way, not the 7c0000 method which was a hack)

    - -

    - This was done on 5320/6 so far. The fix below is for 5320/6 which is now obsolete. This needs to be re-done for the latest version - of 5320. The fix below is (in practise) only for reference, therefore. -

    - -

    - See #x60_cb5927_testing for the original (and current) fix, for the replay code. Now we want - to implement that on top of http://review.coreboot.org/#/c/5320 - which is the current code for native graphics initialization on i945. -

    - -

    - src/northbridge/intel/i945/gma.c (using the 7c0000 hack) on 5320: 5320_7c0000_gma.c (rename it to gma.c, - replacing the current one). -

    - -

    - The above is a hack (as is the original). A better (more correct) method is implemented in later versions of 5927, so - that should also be adapted for 5320. For now, you can use the above fix. -

    - -

    - The correct way to do it is to set gtt address to (end of stolen memory - gtt size), which is what later versions of 5927 do (successfully). -

    - -

    - Here is some debugging output using intel_gpu_tools v1.2-1 (from trisquel repositories) using tool "intel_gtt": -

    - - - -

    Back to top of page

    - -
    - -

    i945/X60: Coreboot 5927 testing (3D fix for kernel 3.12+ on replay code)

    - -

    The latest version as-is (5927/11) has not been tested by me yet. Always boot with 'drm.debug=0x06' kernel parameter when testing this.

    - -

    - This is the fix for 3D on kernel 3.12 and higher on i945 (ThinkPad X60 in this case). This is for the replay code. - Libreboot 5th release has a version of this backported already (based on 5927/3 using the '7c0000' hack). -

    - -

    - - The replay code is obsolete (see 5320 changeset on review.coreboot.org for better version - which supports more machines/screens, and then 5345 for T60). Information here for reference since that is where the fix was first applied. - -

    - -

    - Read the information on http://review.coreboot.org/#/c/5927/. -

    - -

    - For historical purposes, here is a collection of IRC logs that once existed on this page, related to the issue: - kernel312_irc. -

    - -

    - PGETBL_CTL differs between VBIOS (-) and native graphics init (+).
    - - - PGETBL_CTL: 0x3ffc0001
    - + PGETBL_CTL: 0x3f800001 -

    - -

    GTT (graphics translation table) size is PGETBL_save, max 256 KiB. BSM (Base of Stolen Memory) is given by the bios.

    - - - -

    Back to top of page

    - -
    -

    i945 gfx: X60/T60 VBT implementation (experimental: testing)

    intel_bios_dumper (use man) in intel-gpu-tools seems interesting. @@ -802,9 +578,18 @@ Back to top of page.

    +
    + +

    + Copyright © 2014 Francis Rowe <info@gluglug.org.uk>
    + This document is released under the Creative Commons Attribution-ShareAlike 4.0 International Public License and all future versions. + A copy of the license can be found at ../license.txt. +

    +

    - Copyright © 2014 Francis Rowe, All Rights Reserved.
    - See ../license.html for license conditions. + This document is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See ../license.txt for more information.

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