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66 lines
2.2 KiB
66 lines
2.2 KiB
=============== |
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What is pvr2fb? |
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=============== |
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This is a driver for PowerVR 2 based graphics frame buffers, such as the |
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one found in the Dreamcast. |
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Advantages: |
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* It provides a nice large console (128 cols + 48 lines with 1024x768) |
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without using tiny, unreadable fonts (NOT on the Dreamcast) |
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* You can run XF86_FBDev on top of /dev/fb0 |
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* Most important: boot logo :-) |
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Disadvantages: |
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* Driver is largely untested on non-Dreamcast systems. |
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Configuration |
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============= |
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You can pass kernel command line options to pvr2fb with |
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`video=pvr2fb:option1,option2:value2,option3` (multiple options should be |
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separated by comma, values are separated from options by `:`). |
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Accepted options: |
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========== ================================================================== |
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font:X default font to use. All fonts are supported, including the |
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SUN12x22 font which is very nice at high resolutions. |
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mode:X default video mode with format [xres]x[yres]-<bpp>@<refresh rate> |
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The following video modes are supported: |
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640x640-16@60, 640x480-24@60, 640x480-32@60. The Dreamcast |
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defaults to 640x480-16@60. At the time of writing the |
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24bpp and 32bpp modes function poorly. Work to fix that is |
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ongoing |
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Note: the 640x240 mode is currently broken, and should not be |
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used for any reason. It is only mentioned here as a reference. |
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inverse invert colors on screen (for LCD displays) |
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nomtrr disables write combining on frame buffer. This slows down driver |
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but there is reported minor incompatibility between GUS DMA and |
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XFree under high loads if write combining is enabled (sound |
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dropouts). MTRR is enabled by default on systems that have it |
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configured and that support it. |
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cable:X cable type. This can be any of the following: vga, rgb, and |
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composite. If none is specified, we guess. |
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output:X output type. This can be any of the following: pal, ntsc, and |
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vga. If none is specified, we guess. |
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========== ================================================================== |
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X11 |
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=== |
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XF86_FBDev has been shown to work on the Dreamcast in the past - though not yet |
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on any 2.6 series kernel. |
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Paul Mundt <[email protected]> |
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Updated by Adrian McMenamin <[email protected]>
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