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Set it to 3MHz so that the pixel clock frequency is overridden
when it's found to be 49MHz, which is reported to be unstable.
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Probably this makes dualhead mode more useful because it makes
possible displaying video on the LCD as long as the CRT output is
disabled or cloned.
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* Program the MCLK to 157MHz on startup.
* Adjust the requested pixel clock if it's near one of the known
stable frequencies.
* Prefer the clock alternative with post scalar turned on when the
denominator is even.
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After the RandR1.2 implementation the "UseBIOS" option wasn't actually
programming the hardware through VESA BIOS, this brings back that
functionality.
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Save some registers not previously tracked, and use pSmi->mode instead
of continuously reading the hardware state.
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This fixes 1280x1024 modes on the VGA output with dual head on.
Also, solve a build problem when using -DSMI_DEBUG, as pointed by
Richard Schwarting.
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The LEAVE() macro, when debug is disabled, now is defined as:
<hash>define LEAVE(...) return __VA_ARGS__
This avoids the requirement of a return statement after the LEAVE()
macro call, what can be confusing.
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* Make screen resizing behave better with XAA.
* Move some local variable declarations to the top of
the function definition to conform ANSI C.
* Make the Lynx panel modesetting code to actually
program the panel sync pulse width in dualhead mode.
* Also, fix a crash when using libpciaccess
(the memory wasn't being unmapped).
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Moved most of the Lynx-specific code out of the main
functions at smi_driver.c to some new files: smilynx_hw.c
(With CRTC-independent code like global hardware initialization and
mode saving/restoring), smilynx_crtc.c (With the CRTC-local
procedures) and smilynx_output.c (Output power management, DDC and
monitor detection, currently).
Done something similar with the SMI501 code: split
SMI501_ModeInit in three separate functions: SMI501_HWInit that does
the global initialization, and the CRTC mode_set callbacks
SMI501_ModeSet_crt and SMI501_ModeSet_lcd at smi501_crtc.c.
The SMI501_ModeSet code is divided into SMI501_WriteMode_common,
SMI501_WriteMode_lcd and SMI501_WriteMode_crt, each one updates a
different register set in the hardware.
Inside smi_crtc.c, there is mainly hardware independent
code... Initial CRT controller allocation, shadows, rotation and
framebuffer resizing code.
The shadow code currently relies on EXA... I'm not sure what are the
problems of the EXA implementation in MSOC. Does it work?
I think it would be a good thing to get rid of XAA soon: The next
thing I'll be working on will be EXA Composite... I hope it's possible
to get EXA acceleration working at least as fast as the current
XAA. (Although Teddy Wang confirmed me that the SMI720 DMA engine is
broken...)
So, the patch adds some features like new Lynx dualhead modesetting
code, but it probably breaks some other things:
* Video Overlay: I suppose it does work with EXA activated. It seems
it is also possible to have simultaneous overlays in both CRTCs with the
Lynx hardware (I have some code for this, but still work in progress).
* Hardware Cursor (It needs more integration in the CRTC interfaces).
* The old Shadow FB / rotation code, which we should probably drop.
These are in my TODO list... Along with some more cleaning and other
minor issues in the modesetting code.
About the SMI501 RandR1.2 implementation... I suppose it's specially
lacking per-output DPMS (The DPMS field in the System Control register
only affects the CRT, doesn't it?).
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