drm/nvc0: implement crtc pll setting

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/nouveau_bios.c

@@ -4828,7 +4828,7 @@ int get_pll_limits(struct drm_device *dev, uint32_t limit_match, struct pll_lims
 		pll_lim->min_p = record[12];
 		pll_lim->max_p = record[13];
 		/* where did this go to?? */
-		if (limit_match == 0x00614100 || limit_match == 0x00614900)
+		if ((entry[0] & 0xf0) == 0x80)
 			pll_lim->refclk = 27000;
 		else
 			pll_lim->refclk = 100000;

drivers/gpu/drm/nouveau/nv50_crtc.c

@@ -264,11 +264,16 @@ nv50_crtc_set_scale(struct nouveau_crtc *nv_crtc, int scaling_mode, bool update)
 int
 nv50_crtc_set_clock(struct drm_device *dev, int head, int pclk)
 {
-	uint32_t reg = NV50_PDISPLAY_CRTC_CLK_CTRL1(head);
+	struct drm_nouveau_private *dev_priv = dev->dev_private;
 	struct pll_lims pll;
-	uint32_t reg1, reg2;
+	uint32_t reg, reg1, reg2;
 	int ret, N1, M1, N2, M2, P;
 
+	if (dev_priv->chipset < NV_C0)
+		reg = NV50_PDISPLAY_CRTC_CLK_CTRL1(head);
+	else
+		reg = 0x614140 + (head * 0x800);
+
 	ret = get_pll_limits(dev, reg, &pll);
 	if (ret)
 		return ret;
@@ -286,7 +291,8 @@ nv50_crtc_set_clock(struct drm_device *dev, int head, int pclk)
 		nv_wr32(dev, reg, 0x10000611);
 		nv_wr32(dev, reg + 4, reg1 | (M1 << 16) | N1);
 		nv_wr32(dev, reg + 8, reg2 | (P << 28) | (M2 << 16) | N2);
-	} else {
+	} else
+	if (dev_priv->chipset < NV_C0) {
 		ret = nv50_calc_pll2(dev, &pll, pclk, &N1, &N2, &M1, &P);
 		if (ret <= 0)
 			return 0;
@@ -298,6 +304,17 @@ nv50_crtc_set_clock(struct drm_device *dev, int head, int pclk)
 		nv_wr32(dev, reg, 0x50000610);
 		nv_wr32(dev, reg + 4, reg1 | (P << 16) | (M1 << 8) | N1);
 		nv_wr32(dev, reg + 8, N2);
+	} else {
+		ret = nv50_calc_pll2(dev, &pll, pclk, &N1, &N2, &M1, &P);
+		if (ret <= 0)
+			return 0;
+
+		NV_DEBUG(dev, "pclk %d out %d N %d fN 0x%04x M %d P %d\n",
+			 pclk, ret, N1, N2, M1, P);
+
+		nv_mask(dev, reg + 0x0c, 0x00000000, 0x00000100);
+		nv_wr32(dev, reg + 0x04, (P << 16) | (N1 << 8) | M1);
+		nv_wr32(dev, reg + 0x10, N2 << 16);
 	}
 
 	return 0;