summaryrefslogtreecommitdiff
path: root/drivers
diff options
context:
space:
mode:
Diffstat (limited to 'drivers')
-rw-r--r--drivers/ct69000.c18
1 files changed, 14 insertions, 4 deletions
diff --git a/drivers/ct69000.c b/drivers/ct69000.c
index 7962f74..5635562 100644
--- a/drivers/ct69000.c
+++ b/drivers/ct69000.c
@@ -830,6 +830,7 @@ FindAndSetPllParamIntoXrRegs (unsigned int pixelclock,
unsigned int m, n, vld, pd, PD, fref, xr_cb;
unsigned int fvcomin, fvcomax, pclckmin, pclckmax, pclk;
unsigned int pfreq, fvco, new_pixclock;
+ unsigned int D,nback,mback;
fref = VIDEO_FREF;
pd = 1;
@@ -850,10 +851,19 @@ FindAndSetPllParamIntoXrRegs (unsigned int pixelclock,
PD++;
}
/* fvco is exactly pd * pixelclock and higher than the ninmal VCO frequency */
- vld = (param->vld_set > param->vld_not_set) ?
- param->vld_not_set : param->vld_set;
- /* start with lower VLD (higher VLD is NOT yet implemented */
- FindBestPQFittingMN (fvco / vld, fref, param->mn_min, param->mn_max, &m, &n); /* rds = 1 */
+ /* first try */
+ vld = param->vld_set;
+ D=FindBestPQFittingMN (fvco / vld, fref, param->mn_min, param->mn_max, &m, &n); /* rds = 1 */
+ mback=m;
+ nback=n;
+ /* second try */
+ vld = param->vld_not_set;
+ if(D<FindBestPQFittingMN (fvco / vld, fref, param->mn_min, param->mn_max, &m, &n)) { /* rds = 1 */
+ /* first try was better */
+ m=mback;
+ n=nback;
+ vld = param->vld_set;
+ }
m += param->mn_diff;
n += param->mn_diff;
PRINTF ("VCO %d, pd %d, m %d n %d vld %d \n", fvco, pd, m, n, vld);