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>
diff --git a/drivers/gpu/drm/nouveau/nouveau_mem.c b/drivers/gpu/drm/nouveau/nouveau_mem.c
index 3d43098..f0e2a43 100644
--- a/drivers/gpu/drm/nouveau/nouveau_mem.c
+++ b/drivers/gpu/drm/nouveau/nouveau_mem.c
@@ -735,6 +735,8 @@
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 @@
/* 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,
diff --git a/drivers/gpu/drm/nouveau/nouveau_perf.c b/drivers/gpu/drm/nouveau/nouveau_perf.c
index bd6071f..cc8beb8 100644
--- a/drivers/gpu/drm/nouveau/nouveau_perf.c
+++ b/drivers/gpu/drm/nouveau/nouveau_perf.c
@@ -139,7 +139,7 @@
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;
diff --git a/drivers/gpu/drm/nouveau/nouveau_pm.h b/drivers/gpu/drm/nouveau/nouveau_pm.h
index 5a61f05..1a8ae15 100644
--- a/drivers/gpu/drm/nouveau/nouveau_pm.h
+++ b/drivers/gpu/drm/nouveau/nouveau_pm.h
@@ -60,6 +60,7 @@
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 *);