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diff --git a/docs/future/index.md b/docs/future/index.md deleted file mode 100644 index 705a71fc..00000000 --- a/docs/future/index.md +++ /dev/null @@ -1,378 +0,0 @@ -% Development notes - -These are development notes, for future use. For old (obselete) notes, -see [old.html](old.html). - -Or go [back to main task list](../tasks.html). - -Table of contents -================= - -- [Standard test](#standard_test) -- [T60 cpu microcode](#t60_cpu_microcode) -- [i945 VRAM size](#i945_vram_size) -- [LCD panels on i945 - fix incompatible - panels](#lcd_i945_incompatibility) - -- [i945 X60/T60 VBT implementation (experimental: testing)](#i945_vbt) -- [IntelVbtTool results](#intelvbttool_results) -- [Fallback patches for i945](#fallback_patches) - -standard test {#standard_test} -============= - -These logs are usually obtained when testing changes related to graphics -on i945 (X60 and T60). - -- Make a copy of these files: - - /var/log/dmesg - - /var/log/kern.log - - /var/log/Xorg.0.log - - /proc/ioports - - /proc/iomem - - /sys/class/drm/card0/error -- Record these outputs: - - sudo intel\_reg\_dumper - - uname -r - - lspci -vvvvnnnnxxxx - - sudo modprobe msr - - sudo inteltool -a - - sudo cbmem -c -- Try some 3D games with latest kernel. - -T60 cpu microcode {#t60_cpu_microcode} -================= - -TODO: T60: find (for rare buggy CPUs that are unstable without microcode -updates) if there is a workaround (patched kernel, special parameter, -etc) So far, only 1 processor has been found to have issues. See -microcode errata sheets -http://download.intel.com/design/mobile/SPECUPDT/31407918.pdf and -http://download.intel.com/design/mobile/SPECUPDT/30922214.pdf and then -look at the debugging results collected in [t7200q](../t7200q) directory -(q means quirk). - -Every other T7200 tested so far has worked without microcode updates. - -i945 VRAM size {#i945_vram_size} -============== - -Apparently, only 8MB VRAM is available on i945 GPUs (though it could do -64MB):\ -phcoder: No. Hardware default is 8 MiB. When I wanted to make it -configurable, I saw that docs mention only one other alternative: 1MiB. -Later isn't event enough for 1024x768 at 24bpp without any acceleration -or double buffering. It's possible that there are undocumented values. -Which options do you have in vendor BIOS? How to find out how much vram -you have:\ -phcoder: TOM - BSM\ -phcoder: check what vendor BIOS offers as options\ -vimuser: I thought it could do 64MB usually\ -phcoder: not accorging to doc.\ -phcoder: see mobile-945-express-chipset-datasheet page 93\ -phcoder: see also -src/northbridge/intel/i945/{early\_init,northbridge,gma}.c\ -vimuser: "011 = DVMT (UMA) mode, 8 MB of memory pre-allocated for\ -vimuser: frame buffer."\ -vimuser: "Others - reserved"\ -phcoder: the easiest way is a loop at this position which tries -different values and reads (and prints) BSM with them\ -stefanct: vimuser: they suggest that you change the value and look how -BSM reacts to that\ -stefanct: as they pointed out earlier vram size = TOM - BSM\ -stefanct: different values of GMS\ -stefanct: phcoder: hm\... this could be a hint. look at the text -description of TOLUD at page 103\ -stefanct: it mentions 64 MB in the text about BSM as well\ -stefanct: table 18\...\ -phcoder: stefanct: I have a guess which value make is 64 but I will not -tell to avoid skewing test results\ -stefanct: phcoder: sure\... i assumed you were not sure if it supports -it at all. testing it properly is of course a good idea :)\ -stefanct: test the various possible (but reserved) values of GMS and see -what the resulting VRAM size is\ -vimuser: so, TOM - BSM - -LCD panels on i945 - fix incompatible panels {#lcd_i945_incompatibility} -============================================ - -Fix T60 issues (see incompatible panels listed at -[../hcl/\#supported\_t60\_list](../hcl/#supported_t60_list)). - -Run that tool (resources/utilities/i945gpu/intel-regs.py) as root on -systems with the offending panels in: - -- Coreboot (or libreboot, whatever) with VBIOS (disable native - graphics also) -- (Factory BIOS also?) - -This shows values in devicetree.cb and src/northbridge/intel/i945/gma.c, -the idea is that you run it on factory bios or vbios and that it will -(might) show different values: then you try those in the native graphics -(in libreboot). - -Other values/registers might also need to be added to the script for -these tests. - -check if intel\_bios\_reader from intel-gpu-tools reports the same value -(BIOS has a hardcoded value) for PWM modulation frequency. This file can -read the VBIOS (64K dump). - -Check other tools in intel-gpu-tools aswell, compare outputs. Possibly -add more information to intel-regs.py output (submit changes to mtjm). -Do oprom trace / replay -(<http://www.coreboot.org/User:GNUtoo#How_to_get_rid_of_the_vbios_of_the_x60_.5BNew_Version.5D>) - -Study how EDID works and how gma.c handles it. - -Original getregs.py script can be found at -<http://hg.mtjm.eu/scripts/file/tip/intel-regs.py> written by Michał -Masłowski. - -About fixing remaining LCD panels on 5345:\ -'polarity' is mentioned in coreboot log (cbmem -c). compare output -(with working and non-working panel). (and see the other notes in -docs/future/) - -There was a theory that working panels are 6bpc (bits per colour) and -nonworking are 8bpc, but all EDIDs that we have here are for 6bpc -panels. - -We should compare coreboot logs (from `cbmem -c` from systems with -working and nonworking panels. - -How to dump EDID: - - # apt-get install i2c-tools - # modprobe i2c-dev -Find out the correct ID to use: - # i2cdetect -l\ -Example: - - # i2cdump -y 2 0x50 - -Working panel: EDID dump from LG-Philips LP150E05-A2K1: - - No size specified (using byte-data access) - 0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef - 00: XX ff ff ff ff ff ff 00 30 ae 43 40 00 00 00 00 X.......0?C@.... - 10: 00 0f 01 03 80 1e 17 78 ea af 00 99 58 53 8c 2a .??????x??.?XS?* - 20: 25 50 54 21 08 00 81 80 01 01 01 01 01 01 01 01 %PT!?.?????????? - 30: 01 01 01 01 01 01 30 2a 78 20 51 1a 10 40 30 70 ??????0*x Q??@0p - 40: 13 00 31 e4 10 00 00 18 28 23 78 20 51 1a 10 40 ?.1??..?(#x Q??@ - 50: 30 70 13 00 31 e4 10 00 00 18 00 00 00 0f 00 90 0p?.1??..?...?.? - 60: 43 32 90 43 28 14 06 00 32 0c 00 00 00 00 00 fe C2?C(??.2?.....? - 70: 00 4c 50 31 35 30 45 30 35 2d 41 32 0a 20 00 9b .LP150E05-A2? .? - 80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ - 90: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ - a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ - b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ - c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ - d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ - e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ - f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ - -Working panel: EDID dump from Boe-Hydis HT14P12-100 FRU: 13N7061 -(Inverter FRU: 41W1010) - - 0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef - 00: 00 ff ff ff ff ff ff 00 30 ae 22 40 00 00 00 00 ........0?"@.... - 10: 00 0f 01 03 80 1c 15 78 ea af 40 95 56 4a 8f 25 .??????x??@?VJ?% - 20: 20 50 54 21 08 00 81 80 01 01 01 01 01 01 01 01 PT!?.?????????? - 30: 01 01 01 01 01 01 30 2a 78 20 51 1a 10 40 30 70 ??????0*x Q??@0p - 40: 13 00 1d d6 10 00 00 19 25 23 78 20 51 1a 10 40 ?.???..?%#x Q??@ - 50: 30 70 13 00 1d d6 10 00 00 19 00 00 00 0f 00 90 0p?.???..?...?.? - 60: 43 32 90 43 28 0f 01 00 09 e5 00 00 00 00 00 fe C2?C(??.??.....? - 70: 00 48 54 31 34 50 31 32 2d 31 30 30 0a 20 00 3f .HT14P12-100? .? - 80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ - 90: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ - a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ - b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ - c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ - d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ - e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ - f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ - -LTN141XA-L01: revert to libreboot git commit c943281 to see this - -**Non-**working panel: EDID dump from Samsung LTN150XG-L08: - - 0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef - 00: 00 ff ff ff ff ff ff 00 30 ae 40 40 00 00 00 00 ........0?@@.... - 10: 00 0f 01 03 80 1f 17 78 ea 2d 05 97 57 51 8a 27 .??????x?-??WQ?' - 20: 23 50 54 21 08 00 01 01 01 01 01 01 01 01 01 01 #PT!?.?????????? - 30: 01 01 01 01 01 01 64 19 00 40 41 00 26 30 18 88 ??????d?.@A.&0?? - 40: 36 00 30 e4 10 00 00 19 28 15 00 40 41 00 26 30 6.0??..?(?.@A.&0 - 50: 18 88 36 00 30 e4 10 00 00 19 00 00 00 0f 00 61 ??6.0??..?...?.a - 60: 43 32 61 43 28 14 01 00 4c a3 58 47 00 00 00 fe C2aC(??.L?XG...? - 70: 00 4c 54 4e 31 35 30 58 47 2d 4c 30 38 0a 00 6d .LTN150XG-L08?.m - 80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ - 90: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ - a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ - b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ - c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ - d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ - e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ - f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ - -i945 gfx: X60/T60 VBT implementation (experimental: testing) {#i945_vbt} -============================================================ - -intel\_bios\_dumper in intel-gpu-tools seems interesting. - -**Use 'drm.debug=0x06' kernel parameter when booting in grub!** - -Before each test run, boot a live USB and delete the old logs in -/var/log (kernel log, xorg log, dmesg and so on). - -Load (from the ROM) the runningvga.bin for each LCD panel on each -system; do not execute it, only load it! (coreboot will have to be -modified). Rename the ROM appropriately, based on the system name and -the panel name. -coreboot\_nativegfx\_5868\_plusrunningvga\_t60\_14\_LTD141ECMB.rom, for -instance. Keep a copy for later use. - -You are supposed to: - -- enable native graphics in menuconfig -- include the self-modified VGA ROM (load, but not execute) - for - reverse engineering the correct VBT tables. - -With each boot, make notes about what you see and get logs using the -[standard test](#standard_test). You will need the files from -[\#intelvbttool\_results](#intelvbttool_results) for each system. - -Results (\# means untested): -- **X60/X60s:** - - TMD-Toshiba LTD121ECHB: \# - - CMO N121X5-L06: \# - - Samsung LTN121XJ-L07: \# - - BOE-Hydis HT121X01-101: \# -- **X60T XGA:** - - BOE-Hydis HV121X03-100: \# -- **X60T SXGA+:** - - BOE-Hydis HV121P01-100: \# -- **T60 14" XGA:** - - Samsung LTN141XA-L01: \# - - CMO N141XC: \# - - BOE-Hydis HT14X14: \# - - TMD-Toshiba LTD141ECMB: \# -- **T60 14" SXGA+** - - TMD-Toshiba LTD141EN9B: \# - - Samsung LTN141P4-L02: \# - - Boe-Hydis HT14P12: \# -- **T60 15" XGA** - - Samsung LTN150XG-L08: \# - - LG-Philips LP150X09: \# - - 13N7068 (IDtech): \# - - 13N7069 (CMO): \# -- **T60 15" SXGA+** - - LG-Philips LP150E05-A2K1: \# - - BOE-Hydis HV150P01-100: \# -- **T60 15" UXGA** - - BOE-Hydis HV150UX1-100: \# - - IDTech N150U3-L01: \# - - BOE-Hydis HV150UX1-102: \# -- **T50 15" QXGA** - - IDtech IAQX10N: \# - - IDtech IAQX10S: \# - -[Back to top of page](#pagetop) - -intelvbttool test results (VGA ROM dumps) {#intelvbttool_results} -========================================= - -The VBIOS on i945 (intel gpu) platforms is self-modifying; that is, its -contents change when you run it. intelvbttool takes a dump of the -currently running vbios, and parses it. - -The idea is that we can extract the VBT tables using this knowledge, on -the X60, X60 Tablet and T60 (Intel GPU). - -Here is an example of how VBT was implemented on the ThinkPad X230: -<http://review.coreboot.org/#/c/5396>. - -You'll need to build a T60 ROM with SeaBIOS and the VGA ROM (for Intel -GPU). An X60 ROM is also needed (same configuration, using the VGA ROM -for X60). - -T60 has DVI on its dock, make sure that the dock is attached when -getting this output. - -Get intelvbttool here: <http://review.coreboot.org/#/c/5842> -(util/intelvbttool). - -Now dump a copy of the running VGA BIOS: **\$ sudo dd if=/dev/mem bs=64k -of=runningvga.bin skip=12 count=1**\ -Then do (and record the output): - - $ ./intelvbttool runningvga.bin > intelvbttool\_out - -Backup both files (runningvga.bin and intelvbttool\_out), renaming them -to match the system and LCD panel used. -[../misc/\#get\_edid\_panelname](../misc/#get_edid_panelname) will show -you how to get the name (model) of the LCD panel used. - -Test results (\# means untested and all had docks, unless noted). ------------------------------------------------------------------ - -- **X60/X60s:** - - TMD-Toshiba LTD121ECHB: \# - - CMO N121X5-L06: \# - - Samsung LTN121XJ-L07: \# - - BOE-Hydis HT121X01-101: \# -- **X60T XGA (1024x768):** - - BOE-Hydis HV121X03-100: \# -- **X60T SXGA+ (1400x1050):** - - BOE-Hydis HV121P01-100: \# -- **T60 14" XGA (1024x768):** - - Samsung LTN141XA-L01: \# - - CMO N141XC: \# - - BOE-Hydis HT14X14: \# - - TMD-Toshiba LTD141ECMB: \# -- **T60 14" SXGA+ (1400x1050):** - - TMD-Toshiba LTD141EN9B: \# - - Samsung LTN141P4-L02: \# - - Boe-Hydis HT14P12: \# -- **T60 15" XGA (1024x768):** - - Samsung LTN150XG-L08: \# - - LG-Philips LP150X09: \# - - 13N7068 (IDtech): \# - - 13N7069 (CMO): \# -- **T60 15" SXGA+ (1400x1050):** - - LG-Philips LP150E05-A2K1: \# - - BOE-Hydis HV150P01-100: \# -- **T60 15" UXGA (1600x1200):** - - BOE-Hydis HV150UX1-100: \# - - IDTech N150U3-L01: \# - - BOE-Hydis HV150UX1-102: \# -- **T60 15" QXGA (2048x1536):** - - IDtech IAQX10N: \# - - IDtech IAQX10S: \# - -Fallback patches {#fallback_patches} -================ - -- Todo: test gnutoo's fallback patches: - <http://www.coreboot.org/Fallback_mechanism> see [this IRC - log](gnutoo_fallback_patch) (warning, not cleaned up) - -Other - unlisted (low priority) {#other} -=============================== - -- PTE errors still exist on i945 with 6718 (which is merged). - <http://review.coreboot.org/#/c/6718/> - - [dmesg](future/dumps/pte_x60_6718/dmesg) - - [kern.log](future/dumps/pte_x60_6718/kern.log) - - This doesn't seem to cause any issues for general use. -- Implement INT 10H support in i945 native graphics. (this will be a - lot of work. SeaBIOS has code for some geode boards, to get a - general idea). -- T60 15" QXGA (2048x1536): fixed issue where GRUB wouldn't show any - graphics. (Not many people have this panel) - - It might be the same issue I ran into with Paul on the X60 (not - enough memory being allocated) since the same code works on T60 - SXGA+ and UXGA, where GRUB actually display graphics. - -Copyright © 2014, 2015 Leah Rowe <info@minifree.org>\ -This page is available under the [CC BY SA 4.0](../cc-by-sa-4.0.txt) |