AMD Geode(TM) GX Processors* (GX 533@1.1W, GX 500@1.0W, GX 466@0.9W) 
Linux 2.4.17 - Kernel Frame Buffer Driver - Release Notes
Version 2.7.14, General Release
Release Date: December 5, 2003

*The AMD Geode GX 533@1.1W processor operates at 400 MHz, the AMD Geode 
GX 500@1.0W operates at 366 MHz, and the AMD Geode GX 466@0.9W processor 
operates at 333 MHz. Model numbers reflect performance as described here:  
http://www.amd.com/connectivitysolutions/geodegxbenchmark.

--------------------------------------------------------------------------------
PRODUCT INFORMATION  
--------------------------------------------------------------------------------
This driver is the frame buffer graphics device driver for Geode GX processors
(GX 533@1.1W, GX 500@1.0W, GX 466@0.9W). The driver works with the Geode 
Linux graphics driver architecture and has been tested with Linux Kernel 2.4.17. 

This product includes: 
- ddc.o
- durango.o
- nsc_fb.o
- nsc_gx2_fb.o
- nsc_ioctl.o
- nsc.o
- nsc_savreg.o
- panel.o
- README (this file)


Features
--------
Supported display modes:
- 640x480 @ 60, 72, 75, 85 Hz , 8, 16 and 32 bpp
- 800x600 @ 56, 60, 72, 75, 85 Hz , 8, 16 and 32 bpp
- 1024x768 @ 60, 70, 75, 85 Hz , 8, 16 and 32 bpp
- 1152x864 @ 75 Hz 8, 16 and 32 bpp
- 1280x1024 @ 60, 75, 85 Hz, 8, 16, and 32 bpp
- 1600x1200 @ 60, 70, 75, 85 Hz, 8, 16 and 32 bpp

- The default mode is 640x480 16 bpp @ 60 Hz.

- To select 1152x864 mode, vfreq 75 Hz option should be supplied along with
  vmode.

- vfreq has no effect on vmode when flat panel option is selected or if panel
  is enabled in the driver.

- vfreq defaults to 60 Hz on all panel modes.

- When both vmode and vfreq options are supplied, if any one option is not
  valid the mode defaults to 640x480 16 bpp @ 60 Hz.

- When both VESA and vfreq options are supplied, if any one option is not valid 
  the mode defaults to 640x480 16 bpp @ 60 Hz.

- To run 1280x1024@32 video memory must be set to >= 8 MB in BIOS.

- To run 1600x1200@32 video memory must be set to >= 9.375 MB in BIOS.
 
- Compression is disabled automatically if video memory is insufficient 
  (e.g., 1280x1024@32 with 8 MB video memory).


Dependencies 
------------
- Kernel v2.4.17
- XpressROM v1.30.02 (or later)
- Durango v2.51.07


Functional Changes
------------------
- Updated version of Durango; fixes Color Space Conversion errors.


Defects Corrected 
-----------------
Issue #202.2: KFB (Kernal Frame Buffer) v2.7.13 reports incorrect version # in dmesg.
Issue #202.4: KFB nsc/makefile breaks module build rules (and breaks vs. 2.4.19).
Issue #202.6: KFB will not compile with 2.4.19 kernel.
Issue #202.9: Release notes incorrectly report supported modes for the Geode processor.
Issue #202.15: Current version of Durango not included with KFB.


Known Errata  
------------
Issue #202.1: Video out of range after standby mode (RH 7.2).
Issue #202.7: KFB driver labeling still referencing "NSC".
Issue #202.8: 1600x1200 refresh rate can not be set above 65 Hz (KFB).
Issue #202.10: 640x480 @ 75 Hz results in 73.0 Hz on scope.
Issue #202.11: Release Notes update required for passing GFx Kernel commands with GRUB.
Issue #202.13: Kernel configuration.help update during source install process.


--------------------------------------------------------------------------------
VALIDATION ENVIRONMENT
--------------------------------------------------------------------------------
Validated on SP4GX22 system platform Version 2, Rework M and Version 3 Rework J, with:
- Geode GX 466@0.9W processor, Silicon Revision 2.1 CRT @ 333 MHz and
  Geode GX 533@1.1W processor, Silicon Revision 2.1 CRT @ 400 MHz 
- Geode CS5535 Companion Device, Silicon Revision A3
- PCI Bus @ 33 MHz or 66 MHz
- 128 MB DDR RAM @ 222 MHz or 256 MB DDR RAM @ 266 MHz
- Developed under Linux v2.4.17

Software:
- Redhat Linux 7.2
- Linux Kernels: 2.4.17 (Kernel.org)
- XFree86 v4.2.0
- GCC v2.96
- MPlayer v0.92-3.0.2
- Sox 12.17.1
- OpenOffice v1.1.0

Drivers:
- Kernel Frame Buffer driver v2.7.14
- XFree86 driver v2.7.12
- OSS Audio v1.1.8
- XpressROM v1.30.02
- Duraudio v1.1.10
- Durango v2.51.07 


--------------------------------------------------------------------------------
INSTALLATION INSTRUCTIONS  
--------------------------------------------------------------------------------
Packages required:
- RedHat 7.2 installation hard disk (installed from CDs)
- Linux kernel source v2.4.17 (linux-2.4.17.tar.gz)
  This can be down loaded from the following ftp site:
  ftp://ftp.kernel.org/pub/linux/kernel/v2.4/linux-2.4.17.tar.gz
- If  /usr/src/linux directory is existing then 
       mv /usr/src/linux  /usr/src/linux.old
- Place the downloaded linux-2.4.17.tar.gz in "/usr/src" directory and expand
   it.
      tar -zxvf linux-2.4.17.tar.gz
      mv linux linux-2.4.17
      ln -s linux-2.4.17 linux


--------------------------------------------------------------------------------
BUILD INSTRUCTIONS
--------------------------------------------------------------------------------
NOTE: Use of the install command above is *not* recommended for versions other
than 2.4.17.  For other kernel versions changes *will* be required to at
least the following files in drivers/video. 
	Config.in
	Makefile
	fbmem.c

Unsupported revisions of these files can be found in:
	kfbgeode-2.4.19.tar.gz

The 'nsc' subdirectory should be copied by hand to the appropriate
drivers/video. For example:
	cp -a nsc /usr/src/linux-2.4.19/drivers/video

1. Extract the supplied nsc-kfb-driver-xx.xx.xx source tar file in "root"
   home directory:
	cd /root
	tar -zxvf nsc-kfb-driver-xx.xx.xx.tar.gz
   The directory /root/nsc-kfb-driver-xx.xx.xx will be created.
  
2. Install the driver into the Linux kernel source tree:
	cd /root/nsc-kfb-driver-xx.xx.xx
	./install

- Configure the Geode frame buffer driver:

   a) Start Linux configuration menus (assumes /usr/src/linux as your kernel)
	cd /usr/src/linux
	make menuconfig"

   b) Goto "Code maturity level options"

   c) Enable "Prompt for development drivers"

   d) Goto top level menu and select "Processor type and features"
      - Select "Processor family as 586x/K5/5x86/6x86/6x86MX"
      - Disable "Symmetric multi-processing support"
    
   e) Goto top level menu and select "General setup"
   NOTE: APM (Advanced Power Management) support applicable only 
         for Geode SP4SC30 and SP4GX22 system platforms.
    - Select "Power Management Support"
    - Select "Enable Advanced Power Management BIOS Support as "*" "
    - Select "Enable PM at boot time"
    - Select "Enable console blanking using APM"
    - Select "RTC stores time in GMT"
    - Select "Use real mode APM BIOS call to power off"

   f) Goto top level menu and select "Console drivers"
    - Select "Video mode selection support" 

   g) Goto "Frame-buffer Support"
    - Select "Support for frame buffer devices"
    - Select "NSC display support" 
      as "M" for Module or "*" for part of the kernel image
    - Select "FlatPanel Support" if required
    - Select "DDC Support" if required
    - Select "GAL Support" if required
    - Select "Advanced low level driver options"
    - Select "8, 16, 24, and 32 bpp packed pixel support as "*" "

   h) Save the kernel configuration

- For XFree86 Geode STB (Set-Top Box) driver GAL option is mandatory.

- For XFree Geode STB driver, the flat panel option can be set if needed. 

- Build the Linux kernel using commands:
	make dep
	make modules
	make modules_install
	make install

a) Update the file "/etc/lilo.conf" as:
	boot=/dev/hda
	map=/boot/map
	install=/boot/boot.b
	prompt
	timeout=50
	linear
	default=linux-2.4.17

	image=/boot/vmlinuz-2.4.17
			label=linux-2.4.17
			read-only
			root=/dev/hda1

b) Options for Geode KFB driver if it has been compiled as part of the Kernel image:
   - Modify "/etc/lilo.conf" to use these kernel command line options:
	boot=/dev/hda
	map=/boot/map
	install=/boot/boot.b
	prompt
	timeout=50
	linear
	default=linux-2.4.17

	image=/boot/vmlinuz-2.4.17
			append="video=nscfb:vmode:[MODE]"
			label=linux-2.4.17
			read-only
			root=/dev/hda1

        sample options:
        ---------------
        #append="video=nscfb:vmode:791"
        #append="video=nscfb:vmode:1024x768-16,vfreq:75"
        #append="video=nscfb:compression:0"

- Kernel command line options can be passed to nscfb with
  video=nscfb:option1,option2:value2,option3' (multiple options should be 
  separated by comma, values are separated from options by `:'). 

        Accepted options:
        -----------------
        The table for the Kernel mode numbers are:

               |  640x480    800x600    1024x768   1280x1024   1600x1200
        -------+--------------------------------------------------------
        8 bpp  |  0x301/769  0x303/771  0x305/773  0x307/775   0x31C/796
        16 bpp |  0x311/785  0x314/788  0x317/791  0x31A/794   0x31E/798
        24 bpp |  0x312/786  0x315/789  0x318/792  

        vesa:X	- Selects startup videomode. X is number from 0 to 0x1FF.
                  See the above table for detailed explanation. 

        vmode:X	- Selects startup videomode. X is string of the format 
                  widthxheight-depth. 
 
        vfreq:X	- Selects startup video vertical frequency. Takes 60, 70, 72, 75
                  and 85 Hz. Default is 60 Hz.

        Linux_kernel_mode_number = VESA_mode_number + 0x200

        If adding in lilo.conf, use the decimal number and not hex value.
        While using the Geode frame buffer driver do not use "VGA=ASK".
        To turn on the desired mode use the video mode number of the Linux 
	kernel, which is the VESA mode number plus 0x200.

- Option Compression: 
        - compression:1 is to enable the compression.
        - compression:0 is to disable the compression.
        - Default compression is enabled in the driver.

c) Execute the commands:
	- Run "lilo"
	- Run reboot


Installation of Geode KFB driver Compiled as a Module
-----------------------------------------------------

Execute the instructions:
	- cd "/usr/src/linux/drivers/video/nsc/"
	- insmod nsc.o option1=value option2=value option3=value ...etc.

Available options usage:  

i. vmode="mode" 
	(e.g., to set 1024x768-16 mode: insmod nsc.o vmode="1024x768-16")

ii. vesa=value (value should be in hexdecimal or integer format)
	- To set 1024x768-16 mode: insmod nsc.o vesa=0x317 (or 791)

iii. compression=value 
	- By default in the driver, compression is turned on. 
	- To disable compression, the above option can be used as
	  insmod nsc.o compression=0

iv. flatpanel=value 
    	- For flat panel based Geode GX processor platforms default flat panel  
    	  is enabled, so this is not required.
   
Vii. vfreq=value (value should be integer)
	- To select 85 Hz vfreq:  insmod nsc.o vfreq=85

The format to select more than one option: 
	- insmod nsc.o vmode="1024x768-16" vfreq=85


--------------------------------------------------------------------------------
RELEASE HISTORY (Previous Version)
--------------------------------------------------------------------------------
Version 2.7.7, General Release
Release Date: March 28, 2003   


Dependencies
------------
- Durango v2.51.02
- Panel v1.3.5
- DDC v1.1.1 
- tvoset v1.1.0


Functional Changes
------------------
- Readme.txt document modified with simple Build and Install instructions.
- Installation script has been added to install the Geode KFB driver sources.


Defects Corrected
-----------------
- #169.12 vfreq 56 Hz for mode 800x600 is not supported.


File Changes
------------
- All


Known Errata
------------
- Panning is not supported in the driver when flat panel is selected.
- Since flat panel display timings are different from the CRT,
  fbset utility shows different values for the vertical frequency 
  when flat panel enabled.


================================================================================
Copyright
---------
Portions  2004 Advanced Micro Devices, Inc. All rights reserved.
The contents of this document are provided in connection with Advanced Micro 
Devices, Inc. (AMD) products. AMD makes no representations or warranties 
with respect to the accuracy or completeness of the contents of this 
publication and reserves the right to make changes to specifications and product 
descriptions at any time without notice. No license, whether express, implied, 
arising by estoppel or otherwise, to any intellectual property rights is granted 
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of Sale, AMD assumes no liability whatsoever, and disclaims any express or 
implied warranty, relating to its products including, but not limited to, the 
implied warranty of merchantability, fitness for a particular purpose, or 
infringement of any intellectual property right. AMDs products are not designed, 
intended, authorized or warranted for use as components in systems intended for 
surgical implant into the body, or in other applications intended to support or 
sustain life, or in any other application in which the failure of AMDs product 
could create a situation where personal injury, death, or severe property or 
environmental damage may occur. AMD reserves the right to discontinue or make 
changes to its products at any time without notice.


Trademarks
----------
AMD, the AMD Arrow logo, and combinations thereof, and Geode, are trademarks of 
Advanced Micro Devices, Inc.
 
Other product names used in this publication are for identification purposes only 
and may be trademarks of their respective companies.

Open Source License
-------------------
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If the program is interactive, make it output a short notice like this
when it starts in an interactive mode:

    Gnomovision version 69, Copyright (C) year name of author
    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
    This is free software, and you are welcome to redistribute it
    under certain conditions; type `show c' for details.

The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License.  Of course, the commands you use may
be called something other than `show w' and `show c'; they could even be
mouse-clicks or menu items--whatever suits your program.

You should also get your employer (if you work as a programmer) or your
school, if any, to sign a "copyright disclaimer" for the program, if
necessary.  Here is a sample; alter the names:

  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
  `Gnomovision' (which makes passes at compilers) written by James Hacker.

  <signature of Ty Coon>, 1 April 1989
  Ty Coon, President of Vice

This General Public License does not permit incorporating your program into
proprietary programs.  If your program is a subroutine library, you may
consider it more useful to permit linking proprietary applications with the
library.  If this is what you want to do, use the GNU Library General
Public License instead of this License.
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