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Check the pixel clock choosen for a specific refresh rate

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against the maximally allowed pixel clock when choosing
mode lines for VBESetVBEMode() and VESA BIOS version >= 3.0
(Bugzilla #2486).
This commit is contained in:
Egbert Eich
2005-02-07 11:56:31 +00:00
parent a103496e08
commit 31a4191a97
1 changed files with 18 additions and 4 deletions
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22
src/i830_modes.c
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@@ -396,9 +396,15 @@ CheckMode(ScrnInfoPtr pScrn, vbeInfoPtr pVbe, VbeInfoBlock *vbe, int id,
pMode->type = M_T_BUILTIN;
status = xf86CheckModeForMonitor(pMode, pScrn->monitor);
if (status == MODE_OK)
modeOK = TRUE;
else
if (status == MODE_OK) {
if (major >= 3) {
if (pMode->Clock * 1000 <= mode->MaxPixelClock)
modeOK = TRUE;
else
modeOK = FALSE;
} else
modeOK = TRUE;
} else
modeOK = FALSE;
pMode->status = status;
} else {
@@ -643,7 +649,15 @@ i830SetModeParameters(ScrnInfoPtr pScrn, vbeInfoPtr pVbe)
data->mode |= (1 << 11);
data->block->RefreshRate = ((double)(data->block->PixelClock) /
(double)(pMode->HTotal * pMode->VTotal)) * 100;
#ifdef DEBUG
ErrorF("Video Modeline: ID: 0x%x Name: %s %i %i %i %i - "
" %i %i %i %i %.2f MHz Refresh: %.2f Hz\n",
data->mode, pMode->name, pMode->HDisplay, pMode->HSyncStart,
pMode->HSyncEnd, pMode->HTotal, pMode->VDisplay,
pMode->VSyncStart,pMode->VSyncEnd,pMode->VTotal,
(double)data->block->PixelClock/1000000.0,
(double)data->block->RefreshRate/100);
#endif
pMode = pMode->next;
} while (pMode != pScrn->modes);
}