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drm/nouveau/fb/sddr3: Expand MR generation 

Signed-off-by: Roy Spliet <rspliet@eclipso.eu>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Roy Spliet 2014-09-04 16:58:54 +02:00 committed by Ben Skeggs
parent 941844327c
commit 9c870007e9
1 changed files with 33 additions and 10 deletions
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43
drivers/gpu/drm/nouveau/core/subdev/fb/sddr3.c
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@ -20,6 +20,7 @@
* OTHER DEALINGS IN THE SOFTWARE.
*
* Authors: Ben Skeggs <bskeggs@redhat.com>
* Roy Spliet <rspliet@eclipso.eu>
*/
#include <subdev/bios.h>
@ -70,30 +71,52 @@ int
nouveau_sddr3_calc(struct nouveau_ram *ram)
{
struct nouveau_bios *bios = nouveau_bios(ram);
int WL, CL, WR;
int CWL, CL, WR, DLL = 0, ODT = 0;
switch (!!ram->timing.data * ram->timing.version) {
case 0x10:
if (ram->timing.size < 0x17) {
/* XXX: NV50: Get CWL from the timing register */
return -ENOSYS;
}
CWL = nv_ro08(bios, ram->timing.data + 0x13);
CL = nv_ro08(bios, ram->timing.data + 0x02);
WR = nv_ro08(bios, ram->timing.data + 0x00);
DLL = !(nv_ro08(bios, ram->ramcfg.data + 0x02) & 0x40);
ODT = nv_ro08(bios, ram->timing.data + 0x0e) & 0x07;
break;
case 0x20:
WL = (nv_ro16(bios, ram->timing.data + 0x04) & 0x0f80) >> 7;
CL = nv_ro08(bios, ram->timing.data + 0x04) & 0x1f;
WR = nv_ro08(bios, ram->timing.data + 0x0a) & 0x7f;
CWL = (nv_ro16(bios, ram->timing.data + 0x04) & 0x0f80) >> 7;
CL = nv_ro08(bios, ram->timing.data + 0x04) & 0x1f;
WR = nv_ro08(bios, ram->timing.data + 0x0a) & 0x7f;
/* XXX: Get these values from the VBIOS instead */
DLL = !(ram->mr[1] & 0x1);
ODT = (ram->mr[1] & 0x004) >> 2 |
(ram->mr[1] & 0x040) >> 5 |
(ram->mr[1] & 0x200) >> 7;
break;
default:
return -ENOSYS;
}
WL = ramxlat(ramddr3_cwl, WL);
CL = ramxlat(ramddr3_cl, CL);
WR = ramxlat(ramddr3_wr, WR);
if (WL < 0 || CL < 0 || WR < 0)
CWL = ramxlat(ramddr3_cwl, CWL);
CL = ramxlat(ramddr3_cl, CL);
WR = ramxlat(ramddr3_wr, WR);
if (CL < 0 || CWL < 0 || WR < 0)
return -EINVAL;
ram->mr[0] &= ~0xe74;
ram->mr[0] &= ~0xf74;
ram->mr[0] |= (WR & 0x07) << 9;
ram->mr[0] |= (CL & 0x0e) << 3;
ram->mr[0] |= (CL & 0x01) << 2;
ram->mr[1] &= ~0x245;
ram->mr[1] |= (ODT & 0x1) << 2;
ram->mr[1] |= (ODT & 0x2) << 5;
ram->mr[1] |= (ODT & 0x4) << 7;
ram->mr[1] |= !DLL;
ram->mr[2] &= ~0x038;
ram->mr[2] |= (WL & 0x07) << 3;
ram->mr[2] |= (CWL & 0x07) << 3;
return 0;
}