diff options
Diffstat (limited to 'Documentation/fb')
-rw-r--r-- | Documentation/fb/tridentfb.txt | 46 |
1 files changed, 31 insertions, 15 deletions
diff --git a/Documentation/fb/tridentfb.txt b/Documentation/fb/tridentfb.txt index 8a6c8a43e6a3..45d9de5b13a3 100644 --- a/Documentation/fb/tridentfb.txt +++ b/Documentation/fb/tridentfb.txt | |||
@@ -3,11 +3,25 @@ Tridentfb is a framebuffer driver for some Trident chip based cards. | |||
3 | The following list of chips is thought to be supported although not all are | 3 | The following list of chips is thought to be supported although not all are |
4 | tested: | 4 | tested: |
5 | 5 | ||
6 | those from the Image series with Cyber in their names - accelerated | 6 | those from the TGUI series 9440/96XX and with Cyber in their names |
7 | those with Blade in their names (Blade3D,CyberBlade...) - accelerated | 7 | those from the Image series and with Cyber in their names |
8 | the newer CyberBladeXP family - nonaccelerated | 8 | those with Blade in their names (Blade3D,CyberBlade...) |
9 | 9 | the newer CyberBladeXP family | |
10 | Only PCI/AGP based cards are supported, none of the older Tridents. | 10 | |
11 | All families are accelerated. Only PCI/AGP based cards are supported, | ||
12 | none of the older Tridents. | ||
13 | The driver supports 8, 16 and 32 bits per pixel depths. | ||
14 | The TGUI family requires a line length to be power of 2 if acceleration | ||
15 | is enabled. This means that range of possible resolutions and bpp is | ||
16 | limited comparing to the range if acceleration is disabled (see list | ||
17 | of parameters below). | ||
18 | |||
19 | Known bugs: | ||
20 | 1. The driver randomly locks up on 3DImage975 chip with acceleration | ||
21 | enabled. The same happens in X11 (Xorg). | ||
22 | 2. The ramdac speeds require some more fine tuning. It is possible to | ||
23 | switch resolution which the chip does not support at some depths for | ||
24 | older chips. | ||
11 | 25 | ||
12 | How to use it? | 26 | How to use it? |
13 | ============== | 27 | ============== |
@@ -17,12 +31,11 @@ video=tridentfb | |||
17 | 31 | ||
18 | The parameters for tridentfb are concatenated with a ':' as in this example. | 32 | The parameters for tridentfb are concatenated with a ':' as in this example. |
19 | 33 | ||
20 | video=tridentfb:800x600,bpp=16,noaccel | 34 | video=tridentfb:800x600-16@75,noaccel |
21 | 35 | ||
22 | The second level parameters that tridentfb understands are: | 36 | The second level parameters that tridentfb understands are: |
23 | 37 | ||
24 | noaccel - turns off acceleration (when it doesn't work for your card) | 38 | noaccel - turns off acceleration (when it doesn't work for your card) |
25 | accel - force text acceleration (for boards which by default are noacceled) | ||
26 | 39 | ||
27 | fp - use flat panel related stuff | 40 | fp - use flat panel related stuff |
28 | crt - assume monitor is present instead of fp | 41 | crt - assume monitor is present instead of fp |
@@ -31,21 +44,24 @@ center - for flat panels and resolutions smaller than native size center the | |||
31 | image, otherwise use | 44 | image, otherwise use |
32 | stretch | 45 | stretch |
33 | 46 | ||
34 | memsize - integer value in Kb, use if your card's memory size is misdetected. | 47 | memsize - integer value in KB, use if your card's memory size is misdetected. |
35 | look at the driver output to see what it says when initializing. | 48 | look at the driver output to see what it says when initializing. |
36 | memdiff - integer value in Kb,should be nonzero if your card reports | 49 | |
37 | more memory than it actually has.For instance mine is 192K less than | 50 | memdiff - integer value in KB, should be nonzero if your card reports |
51 | more memory than it actually has. For instance mine is 192K less than | ||
38 | detection says in all three BIOS selectable situations 2M, 4M, 8M. | 52 | detection says in all three BIOS selectable situations 2M, 4M, 8M. |
39 | Only use if your video memory is taken from main memory hence of | 53 | Only use if your video memory is taken from main memory hence of |
40 | configurable size.Otherwise use memsize. | 54 | configurable size. Otherwise use memsize. |
41 | If in some modes which barely fit the memory you see garbage at the bottom | 55 | If in some modes which barely fit the memory you see garbage |
42 | this might help by not letting change to that mode anymore. | 56 | at the bottom this might help by not letting change to that mode |
57 | anymore. | ||
43 | 58 | ||
44 | nativex - the width in pixels of the flat panel.If you know it (usually 1024 | 59 | nativex - the width in pixels of the flat panel.If you know it (usually 1024 |
45 | 800 or 1280) and it is not what the driver seems to detect use it. | 60 | 800 or 1280) and it is not what the driver seems to detect use it. |
46 | 61 | ||
47 | bpp - bits per pixel (8,16 or 32) | 62 | bpp - bits per pixel (8,16 or 32) |
48 | mode - a mode name like 800x600 (as described in Documentation/fb/modedb.txt) | 63 | mode - a mode name like 800x600-8@75 as described in |
64 | Documentation/fb/modedb.txt | ||
49 | 65 | ||
50 | Using insane values for the above parameters will probably result in driver | 66 | Using insane values for the above parameters will probably result in driver |
51 | misbehaviour so take care(for instance memsize=12345678 or memdiff=23784 or | 67 | misbehaviour so take care(for instance memsize=12345678 or memdiff=23784 or |