Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) ===============
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) What is pvr2fb?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) ===============
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) This is a driver for PowerVR 2 based graphics frame buffers, such as the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) one found in the Dreamcast.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) Advantages:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)  * It provides a nice large console (128 cols + 48 lines with 1024x768)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)    without using tiny, unreadable fonts (NOT on the Dreamcast)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)  * You can run XF86_FBDev on top of /dev/fb0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)  * Most important: boot logo :-)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) Disadvantages:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)  * Driver is largely untested on non-Dreamcast systems.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) Configuration
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) =============
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) You can pass kernel command line options to pvr2fb with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) `video=pvr2fb:option1,option2:value2,option3` (multiple options should be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) separated by comma, values are separated from options by `:`).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) Accepted options:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) ==========  ==================================================================
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) font:X      default font to use. All fonts are supported, including the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 	    SUN12x22 font which is very nice at high resolutions.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) mode:X      default video mode with format [xres]x[yres]-<bpp>@<refresh rate>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 	    The following video modes are supported:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 	    640x640-16@60, 640x480-24@60, 640x480-32@60. The Dreamcast
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 	    defaults to 640x480-16@60. At the time of writing the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 	    24bpp and 32bpp modes function poorly. Work to fix that is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 	    ongoing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 	    Note: the 640x240 mode is currently broken, and should not be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 	    used for any reason. It is only mentioned here as a reference.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) inverse     invert colors on screen (for LCD displays)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) nomtrr      disables write combining on frame buffer. This slows down driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 	    but there is reported minor incompatibility between GUS DMA and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 	    XFree under high loads if write combining is enabled (sound
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 	    dropouts). MTRR is enabled by default on systems that have it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 	    configured and that support it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) cable:X     cable type. This can be any of the following: vga, rgb, and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 	    composite. If none is specified, we guess.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) output:X    output type. This can be any of the following: pal, ntsc, and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 	    vga. If none is specified, we guess.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) ==========  ==================================================================
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) X11
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) ===
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) XF86_FBDev has been shown to work on the Dreamcast in the past - though not yet
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) on any 2.6 series kernel.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) Paul Mundt <lethal@linuxdc.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) Updated by Adrian McMenamin <adrian@mcmen.demon.co.uk>