[Nouveau] [PATCH 4/4] nv50 - unknown and untested bits of memory controller that save around 0.1W

[Maxim Levitsky]

Not-signed-off-by: Maxim Levitsky <maximlevitsky at gmail.com>
---
 drivers/gpu/drm/nouveau/nv50_fb.c |   11 +++++++++++
 1 files changed, 11 insertions(+), 0 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/nv50_fb.c b/drivers/gpu/drm/nouveau/nv50_fb.c
index bdd2afe..ed0b5f2 100644
--- a/drivers/gpu/drm/nouveau/nv50_fb.c
+++ b/drivers/gpu/drm/nouveau/nv50_fb.c
@@ -86,6 +86,17 @@ nv50_fb_init(struct drm_device *dev)
 	 */
 	nv_wr32(dev, 0x100c08, priv->r100c08 >> 8);
 
+	/* Power usage magic - 0.1W - verified many times*/
+
+	nv_wr32(dev, 0x100000, 0x0000c042);
+	nv_wr32(dev, 0x100004, 0x0000c042);
+	nv_wr32(dev, 0x100008, 0x0000c042);
+	nv_wr32(dev, 0x100b78, 0x0000c042);
+	nv_wr32(dev, 0x100c0c, 0x0000c042);
+	nv_wr32(dev, 0x100d04, 0x0000c042);
+	nv_wr32(dev, 0x100e0c, 0x0000c042);
+
+
 	/* This is needed to get meaningful information from 100c90
 	 * on traps. No idea what these values mean exactly. */
 	switch (dev_priv->chipset) {
-- 
1.7.5.4