path: root/drivers
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authornick <nick@b3059339-0415-0410-9bf9-f77b7e298cf2>2001-11-28 18:49:40 +0000
committernick <nick@b3059339-0415-0410-9bf9-f77b7e298cf2>2001-11-28 18:49:40 +0000
commit040d3a77a3513c6f7ebbbc8db059e8aed6937e8b (patch)
tree8cb1b8f9f115297a6257d43cc935be3b5e56d651 /drivers
parenta882d432381ebd708754954e03cd588ac634a87e (diff)
Just for volunteers
git-svn-id: svn:// b3059339-0415-0410-9bf9-f77b7e298cf2
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diff --git a/drivers/radeon/hacking b/drivers/radeon/hacking
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+ ATI chips hacking
+ =================
+ Dedicated to ATI's hackers.
+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 scaler & sync unit
+ TV format convertor (PAL/NTSC)
+TVCAP - controls Video-In port
+MPP - Miscellaneous peripheral port. (includes ImpactTV(2+) - 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: / \
+ / [ ImpactTV ] 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]
+ 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 PRO (BGA, AGP, 1x only)
+ 3D RAGE PRO (PQFP, PCI, limited 3D)
+ 3D RAGE (XL)
+ 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!
+- 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 IO_BYTE_SELECT 0x0003u
+#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)
+ 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
+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:
+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).
+That's all folk!