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intel_extreme: do not change panel fitter registers in later devices

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This code was accidentally re-enabled in hrev53690.

Should fix #15628.
This commit is contained in:
Adrien Destugues
2020-01-16 19:47:10 +01:00
parent 52ac76ce34
commit f6f76c4795
1 changed files with 8 additions and 0 deletions
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src/add-ons/accelerants/intel_extreme/Ports.cpp
+8
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@@ -620,10 +620,18 @@ LVDSPort::SetDisplayMode(display_mode* target, uint32 colorMode)
panelFitterControl &= ~PANEL_FITTER_ENABLED; panelFitterControl &= ~PANEL_FITTER_ENABLED;
write32(INTEL_PANEL_FIT_CONTROL, panelFitterControl); write32(INTEL_PANEL_FIT_CONTROL, panelFitterControl);
} else { } else {
// We don't need to do anything more for later generations, the
// scaling is handled at the transcoder level. We may want to
// configure dithering, but the code below ignores the previous
// value in the register and may mess things up so we should do
// this in a safeer way. For now, assume the BIOS did the right
// thing.
#if 0
// Disable panel fitting, but enable 8 to 6-bit dithering // Disable panel fitting, but enable 8 to 6-bit dithering
write32(INTEL_PANEL_FIT_CONTROL, 0x4); write32(INTEL_PANEL_FIT_CONTROL, 0x4);
// TODO: do not do this if the connected panel is 24-bit // TODO: do not do this if the connected panel is 24-bit
// (I don't know how to detect that) // (I don't know how to detect that)
#endif
} }
} }