[Nouveau] [PATCH 2/4] nv50: Power down VDEC when reclocking card. This allows to save lot of power and untill support for video decoding is implemented, its best way to make use of this engine

[Maxim Levitsky]

Signed-off-by: Maxim Levitsky <maximlevitsky at gmail.com>
---
 drivers/gpu/drm/nouveau/nv50_pm.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/nv50_pm.c b/drivers/gpu/drm/nouveau/nv50_pm.c
index 0901e56..2527298 100644
--- a/drivers/gpu/drm/nouveau/nv50_pm.c
+++ b/drivers/gpu/drm/nouveau/nv50_pm.c
@@ -595,6 +595,7 @@ calc_mclk(struct drm_device *dev,
 		hwsq_wr32(hwsq, 0x611200, 0x00003330); /* enable scanout */
 	hwsq_fini(hwsq);
 
+
 	*pmast = mast;
 	return 0;
 }
@@ -678,6 +679,10 @@ nv50_pm_clocks_pre(struct drm_device *dev, struct nouveau_pm_level *perflvl)
 		}
 	}
 
+	/* I don't use vdec - so I disable it */
+	mast &= ~0x00000f00;
+	mast |=  0x00000500;
+
 	/* dom6: nfi what this is, but we're limited to various combinations
 	 * of the host clock frequency
 	 */
-- 
1.7.5.4