64b46a0631
The reason for spcial casing 20MHz in the iclkip calculations is that it would overflow the 7 bit divisor value. Let's rewrite the special case to check for just that, and bump up auxdiv when needed. This makes the code work for freqeuencies close to but not exactly 20MHz. The real lower limit for auxdiv=0 is actually: 172800000/(0x7f+2)*64)=~20930 kHz, and below that we must resort to auxdiv=1. Actually this is all very theoretical since we limit the dotclock to min 25MHz with CRT on all platforms. 25Mhz is actually the documented limit in Bspec, so it seems we ought to never need to worry about the auxdiv=1 case. But no harm in having it. Cc: Paulo Zanoni <paulo.r.zanoni@intel.com> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1455738073-14502-5-git-send-email-ville.syrjala@linux.intel.com Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com> Reviewed-by: Imre Deak <imre.deak@intel.com> |
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| ipu-v3 | ||
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| Makefile | ||