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drm/nouveau/pm: detect when we need dll disabled for gddr3 

Fixes minor flickering on NVS295 when at perflvl 0.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Martin Peres <martin.peres@labri.fr>
This commit is contained in:
Ben Skeggs 2012-01-24 11:26:40 +10:00
parent 0ce7141558
commit a9bc247cbb
3 changed files with 12 additions and 1 deletions
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10
drivers/gpu/drm/nouveau/nouveau_mem.c
View File

@ -735,6 +735,8 @@ nouveau_mem_gddr3_mr(struct drm_device *dev, u32 freq,
struct nouveau_pm_memtiming *boot,
struct nouveau_pm_memtiming *t)
{
u8 rver, rlen, *ramcfg = nouveau_perf_ramcfg(dev, freq, &rver, &rlen);
if (len < 15) {
t->drive_strength = boot->drive_strength;
t->odt = boot->odt;
@ -763,9 +765,17 @@ nouveau_mem_gddr3_mr(struct drm_device *dev, u32 freq,
/* CAS */
((nv_mem_cl_lut_gddr3[e->tCL] & 0x7) << 4) |
((nv_mem_cl_lut_gddr3[e->tCL] & 0x8) >> 2);
t->mr[1] = (boot->mr[1] & 0x100f40) | t->drive_strength |
(t->odt << 2) |
(nv_mem_wr_lut_gddr3[e->tWR] & 0xf) << 4;
if (ramcfg && rver == 0x00) {
/* DLL enable/disable */
t->mr[1] &= ~0x00000040;
if (ramcfg[3] & 0x08)
t->mr[1] |= 0x00000040;
}
t->mr[2] = boot->mr[2];
NV_DEBUG(dev, "(%u) MR: %08x %08x %08x", t->id,

2
drivers/gpu/drm/nouveau/nouveau_perf.c
View File

@ -139,7 +139,7 @@ nouveau_perf_rammap(struct drm_device *dev, u32 freq,
return NULL;
}
static u8 *
u8 *
nouveau_perf_ramcfg(struct drm_device *dev, u32 freq, u8 *ver, u8 *len)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;

1
drivers/gpu/drm/nouveau/nouveau_pm.h
View File

@ -60,6 +60,7 @@ int nouveau_voltage_gpio_set(struct drm_device *, int voltage);
void nouveau_perf_init(struct drm_device *);
void nouveau_perf_fini(struct drm_device *);
u8 *nouveau_perf_timing(struct drm_device *, u32 freq, u8 *ver, u8 *len);
u8 *nouveau_perf_ramcfg(struct drm_device *, u32 freq, u8 *ver, u8 *len);
/* nouveau_mem.c */
void nouveau_mem_timing_init(struct drm_device *);