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Diffstat (limited to 'src/atidsp.c')
| -rw-r--r-- | src/atidsp.c | 323 |
1 files changed, 323 insertions, 0 deletions
diff --git a/src/atidsp.c b/src/atidsp.c new file mode 100644 index 0000000..7ca2329 --- /dev/null +++ b/src/atidsp.c @@ -0,0 +1,323 @@ +/* $XFree86: xc/programs/Xserver/hw/xfree86/drivers/ati/atidsp.c,v 1.19 2003/01/01 19:16:31 tsi Exp $ */ +/* + * Copyright 1997 through 2003 by Marc Aurele La France (TSI @ UQV), tsi@xfree86.org + * + * Permission to use, copy, modify, distribute, and sell this software and its + * documentation for any purpose is hereby granted without fee, provided that + * the above copyright notice appear in all copies and that both that copyright + * notice and this permission notice appear in supporting documentation, and + * that the name of Marc Aurele La France not be used in advertising or + * publicity pertaining to distribution of the software without specific, + * written prior permission. Marc Aurele La France makes no representations + * about the suitability of this software for any purpose. It is provided + * "as-is" without express or implied warranty. + * + * MARC AURELE LA FRANCE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, + * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO + * EVENT SHALL MARC AURELE LA FRANCE BE LIABLE FOR ANY SPECIAL, INDIRECT OR + * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, + * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER + * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR + * PERFORMANCE OF THIS SOFTWARE. + */ + +#include "ati.h" +#include "atichip.h" +#include "aticrtc.h" +#include "atidsp.h" +#include "atimach64io.h" +#include "atividmem.h" + +/* + * ATIDSPPreInit -- + * + * This function initialises global variables used to set DSP registers on a + * VT-B or later. + */ +Bool +ATIDSPPreInit +( + int iScreen, + ATIPtr pATI +) +{ + CARD32 IOValue, dsp_config, dsp_on_off, vga_dsp_config, vga_dsp_on_off; + int trp; + + /* + * VT-B's and later have additional post-dividers that are not powers of + * two. + */ + pATI->ClockDescriptor.NumD = 8; + + /* Retrieve XCLK settings */ + IOValue = ATIGetMach64PLLReg(PLL_XCLK_CNTL); + pATI->XCLKPostDivider = GetBits(IOValue, PLL_XCLK_SRC_SEL); + pATI->XCLKReferenceDivider = 1; + switch (pATI->XCLKPostDivider) + { + case 0: case 1: case 2: case 3: + break; + + case 4: + pATI->XCLKReferenceDivider = 3; + pATI->XCLKPostDivider = 0; + break; + + default: + xf86DrvMsg(iScreen, X_ERROR, + "Unsupported XCLK source: %d.\n", pATI->XCLKPostDivider); + return FALSE; + } + + pATI->XCLKPostDivider -= GetBits(IOValue, PLL_MFB_TIMES_4_2B); + pATI->XCLKFeedbackDivider = ATIGetMach64PLLReg(PLL_MCLK_FB_DIV); + + xf86DrvMsgVerb(iScreen, X_INFO, 2, + "Engine XCLK %.3f MHz; Refresh rate code %d.\n", + ATIDivide(pATI->XCLKFeedbackDivider * pATI->ReferenceNumerator, + pATI->XCLKReferenceDivider * pATI->ClockDescriptor.MaxM * + pATI->ReferenceDenominator, 1 - pATI->XCLKPostDivider, 0) / + (double)1000.0, + GetBits(pATI->LockData.mem_cntl, CTL_MEM_REFRESH_RATE_B)); + + /* Compute maximum RAS delay and friends */ + trp = GetBits(pATI->LockData.mem_cntl, CTL_MEM_TRP); + pATI->XCLKPageFaultDelay = GetBits(pATI->LockData.mem_cntl, CTL_MEM_TRCD) + + GetBits(pATI->LockData.mem_cntl, CTL_MEM_TCRD) + trp + 2; + pATI->XCLKMaxRASDelay = GetBits(pATI->LockData.mem_cntl, CTL_MEM_TRAS) + + trp + 2; + pATI->DisplayFIFODepth = 32; + + if (pATI->Chip < ATI_CHIP_264VT4) + { + pATI->XCLKPageFaultDelay += 2; + pATI->XCLKMaxRASDelay += 3; + pATI->DisplayFIFODepth = 24; + } + + switch (pATI->MemoryType) + { + case MEM_264_DRAM: + if (pATI->VideoRAM <= 1024) + pATI->DisplayLoopLatency = 10; + else + { + pATI->DisplayLoopLatency = 8; + pATI->XCLKPageFaultDelay += 2; + } + break; + + case MEM_264_EDO: + case MEM_264_PSEUDO_EDO: + if (pATI->VideoRAM <= 1024) + pATI->DisplayLoopLatency = 9; + else + { + pATI->DisplayLoopLatency = 8; + pATI->XCLKPageFaultDelay++; + } + break; + + case MEM_264_SDRAM: + if (pATI->VideoRAM <= 1024) + pATI->DisplayLoopLatency = 11; + else + { + pATI->DisplayLoopLatency = 10; + pATI->XCLKPageFaultDelay++; + } + break; + + case MEM_264_SGRAM: + pATI->DisplayLoopLatency = 8; + pATI->XCLKPageFaultDelay += 3; + break; + + default: /* Set maximums */ + pATI->DisplayLoopLatency = 11; + pATI->XCLKPageFaultDelay += 3; + break; + } + + if (pATI->XCLKMaxRASDelay <= pATI->XCLKPageFaultDelay) + pATI->XCLKMaxRASDelay = pATI->XCLKPageFaultDelay + 1; + + /* Allow BIOS to override */ + dsp_config = inr(DSP_CONFIG); + dsp_on_off = inr(DSP_ON_OFF); + vga_dsp_config = inr(VGA_DSP_CONFIG); + vga_dsp_on_off = inr(VGA_DSP_ON_OFF); + + if (dsp_config) + pATI->DisplayLoopLatency = GetBits(dsp_config, DSP_LOOP_LATENCY); + + if ((!dsp_on_off && (pATI->Chip < ATI_CHIP_264GTPRO)) || + ((dsp_on_off == vga_dsp_on_off) && + (!dsp_config || !((dsp_config ^ vga_dsp_config) & DSP_XCLKS_PER_QW)))) + { + if (ATIDivide(GetBits(vga_dsp_on_off, VGA_DSP_OFF), + GetBits(vga_dsp_config, VGA_DSP_XCLKS_PER_QW), 5, 1) > 24) + pATI->DisplayFIFODepth = 32; + else + pATI->DisplayFIFODepth = 24; + } + + return TRUE; +} + +/* + * ATIDSPSave -- + * + * This function is called to remember DSP register values on VT-B and later + * controllers. + */ +void +ATIDSPSave +( + ATIPtr pATI, + ATIHWPtr pATIHW +) +{ + pATIHW->dsp_on_off = inr(DSP_ON_OFF); + pATIHW->dsp_config = inr(DSP_CONFIG); +} + + +/* + * ATIDSPCalculate -- + * + * This function sets up DSP register values for a VTB or later. Note that + * this would be slightly different if VCLK 0 or 1 were used for the mode + * instead. In that case, this function would set VGA_DSP_CONFIG and + * VGA_DSP_ON_OFF, would have to zero out DSP_CONFIG and DSP_ON_OFF, and would + * have to consider that VGA_DSP_CONFIG is partitioned slightly differently + * than DSP_CONFIG. + */ +void +ATIDSPCalculate +( + ATIPtr pATI, + ATIHWPtr pATIHW, + DisplayModePtr pMode +) +{ + int Multiplier, Divider; + int RASMultiplier = pATI->XCLKMaxRASDelay, RASDivider = 1; + int dsp_precision, dsp_on, dsp_off, dsp_xclks; + int tmp, vshift, xshift; + +# define Maximum_DSP_PRECISION ((int)MaxBits(DSP_PRECISION)) + + /* Compute a memory-to-screen bandwidth ratio */ + Multiplier = pATI->XCLKFeedbackDivider * + pATI->ClockDescriptor.PostDividers[pATIHW->PostDivider]; + Divider = pATIHW->FeedbackDivider * pATI->XCLKReferenceDivider; + +#ifndef AVOID_CPIO + + if (pATI->depth >= 8) + +#endif /* AVOID_CPIO */ + + { + Divider *= pATI->bitsPerPixel / 4; + } + + /* Start by assuming a display FIFO width of 64 bits */ + vshift = (6 - 2) - pATI->XCLKPostDivider; + +#ifndef AVOID_CPIO + + if (pATIHW->crtc == ATI_CRTC_VGA) + vshift--; /* Nope, it's 32 bits wide */ + +#endif /* AVOID_CPIO */ + + if (pATI->OptionPanelDisplay && (pATI->LCDPanelID >= 0)) + { + /* Compensate for horizontal stretching */ + Multiplier *= pATI->LCDHorizontal; + Divider *= pMode->HDisplay & ~7; + + RASMultiplier *= pATI->LCDHorizontal; + RASDivider *= pMode->HDisplay & ~7; + } + + /* Determine dsp_precision first */ + tmp = ATIDivide(Multiplier * pATI->DisplayFIFODepth, Divider, vshift, -1); + for (dsp_precision = -5; tmp; dsp_precision++) + tmp >>= 1; + if (dsp_precision < 0) + dsp_precision = 0; + else if (dsp_precision > Maximum_DSP_PRECISION) + dsp_precision = Maximum_DSP_PRECISION; + + xshift = 6 - dsp_precision; + vshift += xshift; + + /* Move on to dsp_off */ + dsp_off = ATIDivide(Multiplier * (pATI->DisplayFIFODepth - 1), Divider, + vshift, -1) - ATIDivide(1, 1, vshift - xshift, 1); + + /* Next is dsp_on */ + +#ifndef AVOID_CPIO + + if ((pATIHW->crtc == ATI_CRTC_VGA) /* && (dsp_precision < 3) */) + { + /* + * TODO: I don't yet know why something like this appears necessary. + * But I don't have time to explore this right now. + */ + dsp_on = ATIDivide(Multiplier * 5, Divider, vshift + 2, 1); + } + else + +#endif /* AVOID_CPIO */ + + { + dsp_on = ATIDivide(Multiplier, Divider, vshift, 1); + tmp = ATIDivide(RASMultiplier, RASDivider, xshift, 1); + if (dsp_on < tmp) + dsp_on = tmp; + dsp_on += (tmp * 2) + + ATIDivide(pATI->XCLKPageFaultDelay, 1, xshift, 1); + } + + /* Calculate rounding factor and apply it to dsp_on */ + tmp = ((1 << (Maximum_DSP_PRECISION - dsp_precision)) - 1) >> 1; + dsp_on = ((dsp_on + tmp) / (tmp + 1)) * (tmp + 1); + + if (dsp_on >= ((dsp_off / (tmp + 1)) * (tmp + 1))) + { + dsp_on = dsp_off - ATIDivide(Multiplier, Divider, vshift, -1); + dsp_on = (dsp_on / (tmp + 1)) * (tmp + 1); + } + + /* Last but not least: dsp_xclks */ + dsp_xclks = ATIDivide(Multiplier, Divider, vshift + 5, 1); + + /* Build DSP register contents */ + pATIHW->dsp_on_off = SetBits(dsp_on, DSP_ON) | + SetBits(dsp_off, DSP_OFF); + pATIHW->dsp_config = SetBits(dsp_precision, DSP_PRECISION) | + SetBits(dsp_xclks, DSP_XCLKS_PER_QW) | + SetBits(pATI->DisplayLoopLatency, DSP_LOOP_LATENCY); +} + +/* + * ATIDSPSet -- + * + * This function is called to set DSP registers on VT-B and later controllers. + */ +void +ATIDSPSet +( + ATIPtr pATI, + ATIHWPtr pATIHW +) +{ + outr(DSP_ON_OFF, pATIHW->dsp_on_off); + outr(DSP_CONFIG, pATIHW->dsp_config); +} |