Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) ========================================
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) arkfb - fbdev driver for ARK Logic chips
^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) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) Supported Hardware
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) ==================
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) 	ARK 2000PV chip
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) 	ICS 5342 ramdac
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 	- only BIOS initialized VGA devices supported
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 	- probably not working on big endian
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) Supported Features
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) ==================
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 	*  4 bpp pseudocolor modes (with 18bit palette, two variants)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 	*  8 bpp pseudocolor mode (with 18bit palette)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 	* 16 bpp truecolor modes (RGB 555 and RGB 565)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 	* 24 bpp truecolor mode (RGB 888)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 	* 32 bpp truecolor mode (RGB 888)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	* text mode (activated by bpp = 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	* doublescan mode variant (not available in text mode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	* panning in both directions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	* suspend/resume support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) Text mode is supported even in higher resolutions, but there is limitation to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) lower pixclocks (i got maximum about 70 MHz, it is dependent on specific
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) hardware). This limitation is not enforced by driver. Text mode supports 8bit
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) wide fonts only (hardware limitation) and 16bit tall fonts (driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) limitation). Unfortunately character attributes (like color) in text mode are
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) broken for unknown reason, so its usefulness is limited.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) There are two 4 bpp modes. First mode (selected if nonstd == 0) is mode with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) packed pixels, high nibble first. Second mode (selected if nonstd == 1) is mode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) with interleaved planes (1 byte interleave), MSB first. Both modes support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 8bit wide fonts only (driver limitation).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) Suspend/resume works on systems that initialize video card during resume and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) if device is active (for example used by fbcon).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) Missing Features
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) ================
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) (alias TODO list)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 	* secondary (not initialized by BIOS) device support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 	* big endian support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 	* DPMS support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 	* MMIO support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 	* interlaced mode variant
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 	* support for fontwidths != 8 in 4 bpp modes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 	* support for fontheight != 16 in text mode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 	* hardware cursor
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 	* vsync synchronization
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 	* feature connector support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 	* acceleration support (8514-like 2D)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) Known bugs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) ==========
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 	* character attributes (and cursor) in text mode are broken
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) --
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) Ondrej Zajicek <santiago@crfreenet.org>