Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) ===============================================================
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) vt8623fb - fbdev driver for graphics core in VIA VT8623 chipset
^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) VIA VT8623 [CLE266] chipset and	its graphics core
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) (known as CastleRock or Unichrome)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) I tested vt8623fb on VIA EPIA ML-6000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) Supported Features
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) ==================
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 	*  4 bpp pseudocolor modes (with 18bit palette, two variants)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 	*  8 bpp pseudocolor mode (with 18bit palette)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 	* 16 bpp truecolor mode (RGB 565)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 	* 32 bpp truecolor mode (RGB 888)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 	* text mode (activated by bpp = 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 	* doublescan mode variant (not available in text mode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	* panning in both directions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	* suspend/resume support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	* DPMS support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) Text mode is supported even in higher resolutions, but there is limitation to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) lower pixclocks (maximum about 100 MHz). This limitation is not enforced by
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) driver. Text mode supports 8bit wide fonts only (hardware limitation) and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 16bit tall fonts (driver limitation).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) There are two 4 bpp modes. First mode (selected if nonstd == 0) is mode with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) packed pixels, high nibble first. Second mode (selected if nonstd == 1) is mode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) with interleaved planes (1 byte interleave), MSB first. Both modes support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 8bit wide fonts only (driver limitation).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) Suspend/resume works on systems that initialize video card during resume and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) if device is active (for example used by fbcon).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) Missing Features
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) ================
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) (alias TODO list)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 	* secondary (not initialized by BIOS) device support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 	* MMIO support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 	* interlaced mode variant
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 	* support for fontwidths != 8 in 4 bpp modes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 	* support for fontheight != 16 in text mode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 	* hardware cursor
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 	* video overlay support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 	* vsync synchronization
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 	* acceleration support (8514-like 2D, busmaster transfers)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) Known bugs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) ==========
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 	* cursor disable in text mode doesn't work
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) --
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) Ondrej Zajicek <santiago@crfreenet.org>