Documentation/fb/matroxfb.rst

46 bpp  640x400  640x480  768x576  800x600  960x720
52  24            0x1B2    0x184    0x1B5    0x18C
61 bpp  1024x768 1152x864 1280x1024 1408x1056 1600x1200
67  24    0x1B8    0x194    0x1BB     0x19C     0x1BF
94 architectures there are some glitches for 24bpp videomodes. 8, 16 and 32bpp
197 inv24        change timings parameters for 24bpp modes on Millennium and
219 	     4bpp, 8bpp). In DIRECTCOLOR modes it is limited to characters
252 	     has 8bpp support. Otherwise first available of 640x350x4bpp,
285 depth:X      Bits per pixel: 0=text, 4,8,15,16,24 or 32. Default depends on
316  - 24bpp does not support correctly XF-FBDev on big-endian architectures.
336    (and it works with 8bpp on about 320 MHz dotclocks (and changed mclk)).
352  - 4bpp is available only on Millennium I and Millennium II. It is hardware
354  - selection between 1:5:5:5 and 5:6:5 16bpp videomode is done by -rgba
366 (for 32bpp it is about 3GB of data (exactly 3000 MB); for 8x16 font in
375   8bpp    16.42         9.54   12.33         9.13
376   16bpp   21.00        15.70   19.11        15.02
377   24bpp   36.66        36.66   35.00        35.00
378   32bpp   35.00        30.00   33.85        28.66
383   8bpp     7.79         7.24   13.55         7.78   30.00        21.01
384   16bpp    9.13         7.78   16.16         7.78   30.00        21.01
385   24bpp   14.17        10.72   18.69        10.24   34.99        21.01
386   32bpp   16.15	     16.16   18.73        13.09   34.99        21.01
391   8bpp     8.41         6.01    6.54         4.37   16.00        10.51
392   16bpp    9.54         9.12    8.76         6.17   17.52        14.01
393   24bpp   15.00        12.36   11.67        10.00   22.01        18.32
394   32bpp   16.18        18.29*  12.71        12.74   24.44        21.00
411  + due to hardware limitation, secondary head can use only 16 and 32bpp
431  + due to hardware limitation, secondary head can use only 16 and 32bpp