drm/mgag200: Bug fix: Modified pll algorithm for EH project

[pandora-kernel.git] / drivers / gpu / drm / mgag200 / mgag200_mode.c

diff --git a/drivers/gpu/drm/mgag200/mgag200_mode.c b/drivers/gpu/drm/mgag200/mgag200_mode.c
index a274b99..fe22bb7 100644 (file)
--- a/drivers/gpu/drm/mgag200/mgag200_mode.c
+++ b/drivers/gpu/drm/mgag200/mgag200_mode.c
@@ -382,19 +382,19 @@ static int mga_g200eh_set_plls(struct mga_device *mdev, long clock)
        m = n = p = 0;
        vcomax = 800000;
        vcomin = 400000;
-       pllreffreq = 3333;
+       pllreffreq = 33333;
 
        delta = 0xffffffff;
        permitteddelta = clock * 5 / 1000;
 
-       for (testp = 16; testp > 0; testp--) {
+       for (testp = 16; testp > 0; testp >>= 1) {
                if (clock * testp > vcomax)
                        continue;
                if (clock * testp < vcomin)
                        continue;
 
                for (testm = 1; testm < 33; testm++) {
-                       for (testn = 1; testn < 257; testn++) {
+                       for (testn = 17; testn < 257; testn++) {
                                computed = (pllreffreq * testn) /
                                        (testm * testp);
                                if (computed > clock)
@@ -404,11 +404,11 @@ static int mga_g200eh_set_plls(struct mga_device *mdev, long clock)
                                if (tmpdelta < delta) {
                                        delta = tmpdelta;
                                        n = testn - 1;
-                                       m = (testm - 1) | ((n >> 1) & 0x80);
+                                       m = (testm - 1);
                                        p = testp - 1;
                                }
                                if ((clock * testp) >= 600000)
-                                       p |= 80;
+                                       p |= 0x80;
                        }
                }
        }