diff options
| author | Francisco Jerez <currojerez@gmail.com> | 2008-12-27 00:52:05 +0100 |
|---|---|---|
| committer | Paulo Cesar Pereira de Andrade <pcpa@mandriva.com.br> | 2008-12-29 13:52:26 -0200 |
| commit | 46741589529809c17aa1e9719492a4b623de6ddf (patch) | |
| tree | a86bf8f79f0d83935e31534cb1eec3317ff3a29d /src/smi_driver.c | |
| parent | 439adf4455c651926040eeeec52a092f14f3196b (diff) | |
Some more quirks for the SM712.
* 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.
Diffstat (limited to 'src/smi_driver.c')
| -rw-r--r-- | src/smi_driver.c | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/src/smi_driver.c b/src/smi_driver.c index 79d8a0c..12b618f 100644 --- a/src/smi_driver.c +++ b/src/smi_driver.c @@ -1222,14 +1222,24 @@ SMI_DetectMCLK(ScrnInfoPtr pScrn) int mclk, mxclk; SMIPtr pSmi = SMIPTR(pScrn); - pSmi->MCLK = pSmi->MXCLK = 0; + /* MCLK defaults */ + if (pSmi->Chipset == SMI_LYNXEMplus){ + /* The SM712 can be safely clocked up to 157MHz, according to + Silicon Motion engineers. */ + pSmi->MCLK = 157000; + }else + pSmi->MCLK = 0; + + pSmi->MXCLK = 0; + + /* MCLK from user settings */ if (xf86GetOptValFreq(pSmi->Options, OPTION_MCLK, OPTUNITS_MHZ, &real)) { - pSmi->MCLK = (int)(real * 1000.0); - if (!IS_MSOC(pSmi) && pSmi->MCLK > 120000) { + if (IS_MSOC(pSmi) || (int)real <= 120) { + pSmi->MCLK = (int)(real * 1000.0); + } else { xf86DrvMsg(pScrn->scrnIndex, X_WARNING, "Memory Clock %1.3f MHz larger than limit of 120 MHz\n", real); - pSmi->MCLK = 0; } } mclk = pSmi->MCLK; @@ -1243,6 +1253,7 @@ SMI_DetectMCLK(ScrnInfoPtr pScrn) } } + /* Already programmed MCLK */ if (pSmi->MCLK == 0) { if (IS_MSOC(pSmi)) mclk = ((clock.f.m_select ? 336 : 288) / |