diff options
| author | qwx <devnull@localhost> | 2017-08-23 00:25:39 +0300 |
|---|---|---|
| committer | qwx <devnull@localhost> | 2017-08-23 00:25:39 +0300 |
| commit | 174d7e52a3fd4b48bece311415fbdd9e1bb85ccc (patch) | |
| tree | 9f1760b0279563896898e40c660646d712fae6ee /sys/src/cmd/aux/vga | |
| parent | c6359c3090bf0ca958aab17693567e1b00825213 (diff) | |
igfx: fix cdclk and dpll settings for dual channel lvds on sandybridge
Diffstat (limited to 'sys/src/cmd/aux/vga')
| -rw-r--r-- | sys/src/cmd/aux/vga/igfx.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/sys/src/cmd/aux/vga/igfx.c b/sys/src/cmd/aux/vga/igfx.c index 40d9c2107..cc595c132 100644 --- a/sys/src/cmd/aux/vga/igfx.c +++ b/sys/src/cmd/aux/vga/igfx.c @@ -456,7 +456,7 @@ snarf(Vga* vga, Ctlr* ctlr) case TypeSNB: igfx->npipe = 2; /* A,B */ - igfx->cdclk = 300; /* MHz */ + igfx->cdclk = 400; /* MHz */ goto IVBcommon; case TypeIVB: @@ -843,6 +843,10 @@ initdpll(Igfx *igfx, int x, int freq, int port) dpll->ctrl.v &= ~(3<<24); if(port == PortLCD){ p2 = 14; + if(freq > 112*MHz){ + p2 >>= 1; + dpll->ctrl.v |= (1<<24); + } if(genpll(freq, cref, p2, &m1, &m2, &n, &p1) < 0) return -1; } else { |