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| author | Alan Coopersmith <Alan.Coopersmith@sun.com> | 2006-03-14 23:51:52 +0000 |
|---|---|---|
| committer | Alan Coopersmith <Alan.Coopersmith@sun.com> | 2006-03-14 23:51:52 +0000 |
| commit | 24d5661d2c703582e44ce140d0eb7251433e1ad0 (patch) | |
| tree | 596fcffe716a6fb4f8c4d56c0378493298ba38bb /src/ast_vgatool.c | |
| parent | 4e31187407a6dfe53a9d15f06c8c4584e20125ba (diff) | |
Version 0.80 from ASPEED Technology Inc. (Fixed get video buffer size
incorrect issue) Bugzilla #4937
<https://bugs.freedesktop.org/show_bug.cgi?id=4937> Attachment #4932
<https://bugs.freedesktop.org/attachment.cgi?id=4932>
Diffstat (limited to 'src/ast_vgatool.c')
| -rw-r--r-- | src/ast_vgatool.c | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/src/ast_vgatool.c b/src/ast_vgatool.c index 85b105c..fc761ab 100644 --- a/src/ast_vgatool.c +++ b/src/ast_vgatool.c @@ -58,6 +58,7 @@ void vASTOpenKey(ScrnInfoPtr pScrn); Bool bASTRegInit(ScrnInfoPtr pScrn); ULONG GetVRAMInfo(ScrnInfoPtr pScrn); +ULONG GetMaxDCLK(ScrnInfoPtr pScrn); void vAST1000DisplayOn(ASTRecPtr pAST); void vAST1000DisplayOff(ASTRecPtr pAST); void vSetStartAddressCRT1(ASTRecPtr pAST, ULONG base); @@ -111,6 +112,76 @@ GetVRAMInfo(ScrnInfoPtr pScrn) } +ULONG +GetMaxDCLK(ScrnInfoPtr pScrn) +{ + ASTRecPtr pAST = ASTPTR(pScrn); + UCHAR jReg; + ULONG ulData, ulData2; + ULONG ulRefPLL, ulDeNumerator, ulNumerator, ulDivider; + ULONG ulDRAMBusWidth, ulMCLK, ulDRAMBandwidth, ActualDRAMBandwidth, DRAMEfficiency = 500; + ULONG ulDCLK; + + vASTOpenKey(pScrn); + + *(ULONG *) (pAST->MMIOVirtualAddr + 0xF004) = 0x1e6e0000; + *(ULONG *) (pAST->MMIOVirtualAddr + 0xF000) = 0x00000001; + + /* Get BusWidth */ + ulData = *(ULONG * ) (pAST->MMIOVirtualAddr + 0x10004); + if (ulData & 0x40) + ulDRAMBusWidth = 16; + else + ulDRAMBusWidth = 32; + + /* Get MCLK */ + { + *(ULONG *) (pAST->MMIOVirtualAddr + 0x10100) = 0x000000A8; + + ulData = *(ULONG *) (pAST->MMIOVirtualAddr + 0x10120); + ulData2 = *(ULONG *) (pAST->MMIOVirtualAddr + 0x10170); + if (ulData2 & 0x2000) + ulRefPLL = 14318; + else + ulRefPLL = 12000; + + ulDeNumerator = ulData & 0x1F; + ulNumerator = (ulData & 0x3FE0) >> 5; + + ulData = (ulData & 0xC000) >> 14; + switch (ulData) + { + case 0x03: + ulDivider = 0x04; + break; + case 0x02: + case 0x01: + ulDivider = 0x02; + break; + default: + ulDivider = 0x01; + } + + ulMCLK = ulRefPLL * (ulNumerator + 2) / ((ulDeNumerator + 2) * ulDivider * 1000); + + } + + /* Get Bandwidth */ + ulDRAMBandwidth = ulMCLK * ulDRAMBusWidth * 2 / 8; + ActualDRAMBandwidth = ulDRAMBandwidth * DRAMEfficiency / 1000; + + /* Get Max DCLK */ + GetIndexRegMask(CRTC_PORT, 0xD0, 0xFF, jReg); + if (jReg & 0x08) + ulDCLK = ActualDRAMBandwidth / ((pScrn->bitsPerPixel+1+16) / 8); + else + ulDCLK = ActualDRAMBandwidth / ((pScrn->bitsPerPixel+1) / 8); + + if (ulDCLK > 165) ulDCLK = 165; + + return(ulDCLK); + +} void vSetStartAddressCRT1(ASTRecPtr pAST, ULONG base) |