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Diffstat (limited to 'docs/future/old.md')
| -rw-r--r-- | docs/future/old.md | 52 |
1 files changed, 35 insertions, 17 deletions
diff --git a/docs/future/old.md b/docs/future/old.md index 33fc4458..dc3b5dbd 100644 --- a/docs/future/old.md +++ b/docs/future/old.md @@ -1,10 +1,14 @@ -% Development notes (old/obsolete notes) + +Development notes (old/obsolete notes) +====================================== For current notes, see [](./). These are old (obsolete) notes that mare kept because they might become useful again in the future. + + Table of contents ================= @@ -17,13 +21,15 @@ Table of contents - [i945/x60: coreboot 5927 testing (3D fix for kernel 3.12+ on replay code)](#x60_cb5927_testing) + + X60 native graphics initialization (with backlight controls) {#x60_native_notes} ============================================================ **This is now obsolete. A better way was found (included in libreboot): <http://review.coreboot.org/#/c/6731/>** -***Also check [#5320\_kernel312fix](#5320_kernel312fix) (to fix 3D on +***Also check [\#5320\_kernel312fix](#5320_kernel312fix) (to fix 3D on kernel 3.12/higher)*** **The fix below was done on 5320/6 (from review.coreboot.org) but should @@ -39,15 +45,14 @@ 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 +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](#t60_native_notes)). +[\#t60\_native\_notes](#t60_native_notes)). Further notes ------------- @@ -86,19 +91,23 @@ 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 +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](#pagetop) + + + T60 native graphics initialization (with backlight controls) {#t60_native_notes} ============================================================ **This is now obsolete. A better way was found (included in libreboot): <http://review.coreboot.org/#/c/6731/>** -***Also check [#5320\_kernel312fix](#5320_kernel312fix) (to fix 3D on +***Also check [\#5320\_kernel312fix](#5320_kernel312fix) (to fix 3D on kernel 3.12/higher)*** **The fix below was done on an earlier version of 5345 changeset @@ -109,15 +118,19 @@ included in libreboot 6** change **gpu\_backlight** to **0x58BF58BE** Hold on! Check -[../misc/#get\_edid\_panelname](../misc/#get_edid_panelname) to know +[../misc/\#get\_edid\_panelname](../misc/#get_edid_panelname) to know what LCD panel you have. This is important for the next step! Supported panels ---------------- -[../hcl/#supported\_t60\_list](../hcl/#supported_t60_list). +[../hcl/\#supported\_t60\_list](../hcl/#supported_t60_list). + +See [\#lcd\_i945\_incompatibility](./#lcd_i945_incompatibility). + +[Back to top of page](#pagetop) + -See [#lcd\_i945\_incompatibility](./#lcd_i945_incompatibility). i945: 3D fix (based on 5927) for kernel 3.12+ on 5320 {#5320_kernel312fix} ===================================================== @@ -133,7 +146,7 @@ is also now included in libreboot 6 (using the proper way, not the 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](#x60_cb5927_testing) for the original (and +See [\#x60\_cb5927\_testing](#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. @@ -160,6 +173,10 @@ apt-get repositories) using tool "intel\_gtt": - with coreboot (no vbios or native init): <http://paste.debian.net/104341> +[Back to top of page](#pagetop) + + + i945/X60: Coreboot 5927 testing (3D fix for kernel 3.12+ on replay code) {#x60_cb5927_testing} ======================================================================== @@ -186,10 +203,8 @@ For historical purposes, here is a collection of IRC logs that once existed on this page, related to the issue: [kernel312\_irc](dumps/kernel312_irc). -PGETBL\_CTL differs between VBIOS (-) and native graphics init (+). - -- PGETBL\_CTL: 0x3ffc0001 - +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 @@ -210,8 +225,11 @@ GTT (graphics translation table) size is PGETBL\_save, max 256 KiB. BSM - [/sys/class/drm/card0/error](dumps/5927_crashdump) - [.config](dumps/5927_config) -Copyright © 2014, 2015 Leah Rowe <info@minifree.org> +[Back to top of page](#pagetop) + + +Copyright © 2014, 2015 Leah Rowe <info@minifree.org>\ Permission is granted to copy, distribute and/or modify this document under the terms of the Creative Commons Attribution-ShareAlike 4.0 International license or any later version published by Creative |