ATI chips hacking ================= Dedicated to ATI's hackers. Preface ~~~~~~~ This document will compare ATI chips only from point of DAC and video overlay. There are lots of difference from 3D point, dual-head support, tv-out support and many other things but it's already perfectly different story. This document doesn't include information about ATI AIW (All In Wonder) chips. What are units on modern ATI chips: DAC - (Digital to Analog Convertor) controls CRTC, LCD, DFP monitor's output Consists from: PLL - (Programable line length) registers CRTC - CRT controller LCD/DFP scaler surface control DAC2 - controls CRTC, LCD, DFP monitor's output on second head TVDAC - controls Composite Video and Super Video output ports Consists from: TV_PLL TV scaler & sync unit TV format convertor (PAL/NTSC) TVCAP - controls Video-In port MPP - Miscellaneous peripheral port. (includes macrovision's filter - copy protection mechanism) OV - Video overlay (YUV BES) (include subpictures, gamma correction and adaptive deinterlacing) CAP0 - Video capturing CAP1 - Video capturing (second unit) RT - Rage theatre: video encoding and mixing MUX - video muxer MEM - PCI/AGP bus mastering 2D - GUI engine 3D - 3D-OpenGL engine (There are lots of stuff) I2C - I2C Bus control This document is mainly related only with OV unit ;) Video decoding diagram: RAM memory: [ App ] Copies YUV image to overlay memory | <-- (It's possible to program DMA here) overlay memory:[ OV ] performs scaling and YUVtoRGB convertion /\ RGB memory: / \ / [ macrovision ] performs copy protection filtering / \ (unneeded but presented by default thing;) [ CRTC/LCD/DFP DAC ] [ TV DAC ] convert RGB memory to CRTC and NTSC/PAL signals | | [CRTC/LCD/DFP Monitor] [TV-screen] History ~~~~~~~ What is history of ATI's chips? I can be wrong but below is my vision of this question: 0. I don't know any earlied chips :( 1. Mach8 2. Mach16 3. Mach32 4. Mach64. It's first chip which has support from side of open source drivers. Set of mach64 chips is: mach64GX (ATI888GX00) mach64CX (ATI888CX00) mach64CT (ATI264CT) mach64ET (ATI264ET) mach64VTA3 (ATI264VT) mach64VTA4 (ATI264VT) mach64VTB (ATI264VTB) mach64VT4 (ATI264VT4) 5. 3D rage chips. It seems that these chips have fully compatible by GPU with Mach64 which is extended by 3D possibilities. Set of 3D rage chips is: 3D RAGE (GT) 3D RAGE II+ (GTB) 3D RAGE IIC (PCI) 3D RAGE IIC (AGP) 3D RAGE LT 3D RAGE LT-G 3D RAGE PRO (BGA, AGP) 3D RAGE PRO (BGA, AGP, 1x only) 3D RAGE PRO (BGA, PCI) 3D RAGE PRO (PQFP, PCI) 3D RAGE PRO (PQFP, PCI, limited 3D) 3D RAGE (XL) 3D RAGE LT PRO (AGP) 3D RAGE LT PRO (PCI) 3D RAGE Mobility (PCI) 3D RAGE Mobility (AGP) 6. Rage128 chips. These chips have perfectly new GPU which supports memory mapped IO space for accelerating port access (It's main cause of incompatibility with mach64). Set of Rage128 chips is: Rage128 GL RE Rage128 GL RF Rage128 GL RG Rage128 GL RH Rage128 GL RI Rage128 VR RK Rage128 VR RL Rage128 VR RM Rage128 VR RN Rage128 VR RO Rage128 Mobility M3 LE Rage128 Mobility M3 LF 7. Rage128Pro chips. These chips are successors of Rage128 ones. Rage128Pro GL PA Rage128Pro GL PB Rage128Pro GL PC Rage128Pro GL PD Rage128Pro GL PE Rage128Pro GL PF Rage128Pro VR PG Rage128Pro VR PH Rage128Pro VR PI Rage128Pro VR PJ Rage128Pro VR PK Rage128Pro VR PL Rage128Pro VR PM Rage128Pro VR PN Rage128Pro VR PO Rage128Pro VR PP Rage128Pro VR PQ Rage128Pro VR PR Rage128Pro VR TR Rage128Pro VR PS Rage128Pro VR PT Rage128Pro VR PU Rage128Pro VR PV Rage128Pro VR PW Rage128Pro VR PX Rage128Pro Ultra U1 Rage128Pro Ultra U2 Rage128Pro Ultra U3 8. Radeon chips. Indeed they could be named Rage256 Pro. (With minor changes is fully compatible with Rage128 chips). Radeon QD Radeon QE Radeon QF Radeon QG Radeon VE QY Radeon VE QZ Radeon M6 LY Radeon M6 LZ Radeon M7 LW 9. Radeon2 chips. Indeed they could be named Rage512 Pro. Radeon2 8500 QL Radeon2 7500 QW 10. Radeon3 and newest are cooming soon, but I hope that they will be fully compatible with Radeon1 chips. In Radeon famility there were introduced also FX chips: Radeon FX and Radeon2 8700 FX. Probably they have the same possibility as other Radeon but currently it's unknown for me. What about video overlay and DAC? ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Currently it's known that there is only difference between Mach64 and Rage128 compatible chips: - They have different logic of io ports programming! - They are incompatible by port numbers! But: - They use the same program logic from register's name point. (Indeed exists slight difference even between Radeon and Rage128 chips. AFAIK only Radeon has OV0_SLICE_CNTL register which currently is not used by driver. But I know only its name ;). Also there is difference in slight adjust of BES position but it's configured by #ifdef blocks). Please compare: (The piece of Back-End Scaler programming) Sample for Mach64 compatible chips: *********************************** #define SPARSE_IO_BASE 0x03fcu #define SPARSE_IO_SELECT 0xfc00u #define BLOCK_IO_BASE 0xff00u #define BLOCK_IO_SELECT 0x00fcu #define MM_IO_SELECT 0x03fcu #define BLOCK_SELECT 0x0400u #define DWORD_SELECT (BLOCK_SELECT | MM_IO_SELECT) #define IO_BYTE_SELECT 0x0003u #define SPARSE_IO_PORT (SPARSE_IO_BASE | IO_BYTE_SELECT) #define BLOCK_IO_PORT (BLOCK_IO_BASE | IO_BYTE_SELECT) #define IOPortTag(_SparseIOSelect, _BlockIOSelect) \ (SetBits(_SparseIOSelect, SPARSE_IO_SELECT) | \ SetBits(_BlockIOSelect, BLOCK_SELECT | MM_IO_SELECT)) #define SparseIOTag(_IOSelect) IOPortTag(_IOSelect, 0) #define BlockIOTag(_IOSelect) IOPortTag(0, _IOSelect) ... #define OVERLAY_Y_X_START BlockIOTag(0x100u) #define OVERLAY_Y_X_END BlockIOTag(0x101u) ... #define OUTREG(_Register, _Value) \ MMIO_OUT32(pATI->pBlock[GetBits(_Register, BLOCK_SELECT)], \ (_Register) & MM_IO_SELECT, _Value) ... OUTREG(OVERLAY_Y_X_START,((drw_x)<<16)|(drw_y)|(1<<31)); OUTREG(OVERLAY_Y_X_END,((drw_x+drw_w)<<16)|(drw_y+drw_h)); Sample for Rage128 compatible chips: ************************************ #define OV0_Y_X_START 0x0400 #define OV0_Y_X_END 0x0404 ... #define INREG(addr) readl((rage_mmio_base)+addr) #define OUTREG(addr,val) writel(val, (rage_mmio_base)+addr) ... rage_mmio_base = ioremap_nocache(pci_resource_start (dev, 2),RAGE_REGSIZE); ... #ifdef RADEON #define X_ADJUST 8 #else /* rage128 */ #define X_ADJUST 0 #endif OUTREG(OV0_Y_X_START,(drw_x+X_ADJUST)|(drw_y<<16)); OUTREG(OV0_Y_X_END,(drw_x+drw_w+X_ADJUST)|(drw_y+drw_h)<<16)); Thus - these chips have almost the same logic from register's name point. (except the fact that they have swapped 16-bit halfs). Yes - programming of Rage128 is much simpler of Mach64. What about other ATI's chips? ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ I suggest you have latest copy of GATOS-CVS: http://www.linuxvideo.org GATOS was designed and introduced as General ATI TV and Overlay Sowfware. You will be able to find out there a lots of useful hacking utilities (at location gatos-ati/gatos): gfxdump - Program for dumping graphics chips registers on Linux and Windows 9X. (it's more useful for Win9x to hack their values). xatitv - For working with tv-in (currently is under hard development) atitvout- For working with tv-out and lot of other stuff. BUT: After studing of Gatos and X11 stuffs I've found that they are bad optimized for movie playback. Please compare: radeon_vid - configures video overlay only once and provides DGA to it. (doesn't require to be MMX optimized) gatos and X11 - configures video overlay at every slice of frame, then performs unoptimized copying of source stuff to video memory often with using CopyMungedData (it's C-analog of YV12_to_YUY2) since there are lacks in yv12 support. (is not MMX optimized that's gladly accepted, but probably will be never optimized due portability). hardware IDCT support diagram: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | [ Video parser ] <---------- [ Transport demuxing ] --> [ Audio ] | | | [ Variable length decoder] |D | | |V | [ Inverse quantization ] |D | | | | -------|---[ video card ]---------+ |s | | | |u | [ Run level decode & de-zigzag ] | |b | | | |p | [ IDCT ] | |i | | | |c | [ Motion compensation ] | |t | | | |u | [ Advanced deinterlacing ] | |r | | | |e | [ Filtered X-Y scaling ] [SUBPIC]-|-----+s [ OSD ] | | | | | [ 4-bit alpha blending ] <---+ | +-------+ | | [ YUV to RGB conversion ] | -------|--------------------------+ TV-screen or CRT-display Conslusion: ~~~~~~~~~~~ That's all folk!