Merge remote branch 'nouveau/for-airlied' of /ssd/git/drm-nouveau-next into drm-core-next

* 'nouveau/for-airlied' of /ssd/git/drm-nouveau-next: (27 commits)
  drm/nvc0: fix typo in PRAMIN flush
  drm/nouveau: Fix DCB TMDS config parsing.
  drm/nv30: Fix PFB init for nv31.
  drm/nv04: Fix up SGRAM density detection.
  drm/i2c/ch7006: Don't use POWER_LEVEL_FULL_POWER_OFF on early chip versions.
  drm/nouveau: Init dcb->or on cards that have no usable DCB table.
  drm/nouveau: reduce severity of some "error" messages
  drm/nvc0: backup bar3 channel on suspend
  drm/nouveau: implement init table opcodex 0x5e and 0x9a
  drm/nouveau: implement init table op 0x57, INIT_LTIME
  drm/nvc0: implement crtc pll setting
  drm/nvc0: fix evo dma object so we display something
  drm/nvc0: rudimentary instmem support
  drm/nvc0: implement memory detection
  drm/nvc0: allow INIT_GPIO
  drm/nvc0: starting point for GF100 support, everything stubbed
  drm/nv30: Workaround dual TMDS brain damage.
  drm/nouveau: No need to set slave TV encoder configs explicitly.
  drm/nv17-nv4x: Attempt to init some external TMDS transmitters.
  drm/nv10: Fix up switching of NV10TCL_DMA_VTXBUF.
  ...

1 files changed, 16 insertions, 8 deletions

diff --git a/drivers/gpu/drm/nouveau/nv30_fb.c b/drivers/gpu/drm/nouveau/nv30_fb.c
index 9d35c8b3b83..4a3f2f09512 100644
--- a/drivers/gpu/drm/nouveau/nv30_fb.c
+++ b/drivers/gpu/drm/nouveau/nv30_fb.c
@@ -30,15 +30,25 @@
 #include "nouveau_drm.h"
 
 static int
-calc_ref(int b, int l, int i)
+calc_bias(struct drm_device *dev, int k, int i, int j)
+{
+	struct drm_nouveau_private *dev_priv = dev->dev_private;
+	int b = (dev_priv->chipset > 0x30 ?
+		 nv_rd32(dev, 0x122c + 0x10 * k + 0x4 * j) >> (4 * (i ^ 1)) :
+		 0) & 0xf;
+
+	return 2 * (b & 0x8 ? b - 0x10 : b);
+}
+
+static int
+calc_ref(struct drm_device *dev, int l, int k, int i)
 {
 	int j, x = 0;
 
 	for (j = 0; j < 4; j++) {
-		int n = (b >> (8 * j) & 0xf);
-		int m = (l >> (8 * i) & 0xff) + 2 * (n & 0x8 ? n - 0x10 : n);
+		int m = (l >> (8 * i) & 0xff) + calc_bias(dev, k, i, j);
 
-		x |= (0x80 | (m & 0x1f)) << (8 * j);
+		x |= (0x80 | clamp(m, 0, 0x1f)) << (8 * j);
 	}
 
 	return x;
@@ -63,18 +73,16 @@ nv30_fb_init(struct drm_device *dev)
 	    dev_priv->chipset == 0x35) {
 		/* Related to ROP count */
 		int n = (dev_priv->chipset == 0x31 ? 2 : 4);
-		int b = (dev_priv->chipset > 0x30 ?
-			 nv_rd32(dev, 0x122c) & 0xf : 0);
 		int l = nv_rd32(dev, 0x1003d0);
 
 		for (i = 0; i < n; i++) {
 			for (j = 0; j < 3; j++)
 				nv_wr32(dev, 0x10037c + 0xc * i + 0x4 * j,
-					calc_ref(b, l, j));
+					calc_ref(dev, l, 0, j));
 
 			for (j = 0; j < 2; j++)
 				nv_wr32(dev, 0x1003ac + 0x8 * i + 0x4 * j,
-					calc_ref(b, l, j));
+					calc_ref(dev, l, 1, j));
 		}
 	}