drm/nv50/disp: call into core for dac load detection

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

drivers/gpu/drm/nouveau/core/engine/disp/dacnv50.c

@@ -46,11 +46,11 @@ nv50_dac_power(struct nv50_disp_priv *priv, int or, u32 data)
 }
 
 int
-nv50_dac_sense(struct nv50_disp_priv *priv, int or)
+nv50_dac_sense(struct nv50_disp_priv *priv, int or, u32 loadval)
 {
 	const u32 doff = (or * 0x800);
 	int load = -EINVAL;
-	nv_wr32(priv, 0x61a00c + doff, 0x00100000);
+	nv_wr32(priv, 0x61a00c + doff, 0x00100000 | loadval);
 	udelay(9500);
 	nv_wr32(priv, 0x61a00c + doff, 0x80000000);
 	load = (nv_rd32(priv, 0x61a00c + doff) & 0x38000000) >> 27;
@@ -74,7 +74,7 @@ nv50_dac_mthd(struct nouveau_object *object, u32 mthd, void *args, u32 size)
 		ret = priv->dac.power(priv, or, data[0]);
 		break;
 	case NV50_DISP_DAC_LOAD:
-		ret = priv->dac.sense(priv, or);
+		ret = priv->dac.sense(priv, or, data[0]);
 		if (ret >= 0) {
 			data[0] = ret;
 			ret = 0;

drivers/gpu/drm/nouveau/core/engine/disp/nv50.c

@@ -807,6 +807,7 @@ nv50_disp_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
 	priv->dac.nr = 3;
 	priv->sor.nr = 2;
 	priv->dac.power = nv50_dac_power;
+	priv->dac.sense = nv50_dac_sense;
 	priv->sor.power = nv50_sor_power;
 
 	INIT_LIST_HEAD(&priv->base.vblank.list);

drivers/gpu/drm/nouveau/core/engine/disp/nv50.h

@@ -19,7 +19,7 @@ struct nv50_disp_priv {
 	struct {
 		int nr;
 		int (*power)(struct nv50_disp_priv *, int dac, u32 data);
-		int (*sense)(struct nv50_disp_priv *, int dac);
+		int (*sense)(struct nv50_disp_priv *, int dac, u32 load);
 	} dac;
 	struct {
 		int nr;
@@ -42,7 +42,7 @@ struct nv50_disp_priv {
 
 int nv50_dac_mthd(struct nouveau_object *, u32, void *, u32);
 int nv50_dac_power(struct nv50_disp_priv *, int, u32);
-int nv50_dac_sense(struct nv50_disp_priv *, int);
+int nv50_dac_sense(struct nv50_disp_priv *, int, u32);
 
 #define SOR_MTHD(n) (n), (n) + 0x3f
 

drivers/gpu/drm/nouveau/core/engine/disp/nv84.c

@@ -76,6 +76,7 @@ nv84_disp_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
 	priv->dac.nr = 3;
 	priv->sor.nr = 2;
 	priv->dac.power = nv50_dac_power;
+	priv->dac.sense = nv50_dac_sense;
 	priv->sor.power = nv50_sor_power;
 
 	INIT_LIST_HEAD(&priv->base.vblank.list);

drivers/gpu/drm/nouveau/core/engine/disp/nv94.c

@@ -82,6 +82,7 @@ nv94_disp_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
 	priv->dac.nr = 3;
 	priv->sor.nr = 4;
 	priv->dac.power = nv50_dac_power;
+	priv->dac.sense = nv50_dac_sense;
 	priv->sor.power = nv50_sor_power;
 
 	INIT_LIST_HEAD(&priv->base.vblank.list);

drivers/gpu/drm/nouveau/core/engine/disp/nva0.c

@@ -67,6 +67,7 @@ nva0_disp_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
 	priv->dac.nr = 3;
 	priv->sor.nr = 2;
 	priv->dac.power = nv50_dac_power;
+	priv->dac.sense = nv50_dac_sense;
 	priv->sor.power = nv50_sor_power;
 
 	INIT_LIST_HEAD(&priv->base.vblank.list);

drivers/gpu/drm/nouveau/core/engine/disp/nva3.c

@@ -83,6 +83,7 @@ nva3_disp_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
 	priv->dac.nr = 3;
 	priv->sor.nr = 4;
 	priv->dac.power = nv50_dac_power;
+	priv->dac.sense = nv50_dac_sense;
 	priv->sor.power = nv50_sor_power;
 
 	INIT_LIST_HEAD(&priv->base.vblank.list);

drivers/gpu/drm/nouveau/nv50_dac.c

@@ -71,56 +71,22 @@ nv50_dac_disconnect(struct drm_encoder *encoder)
 static enum drm_connector_status
 nv50_dac_detect(struct drm_encoder *encoder, struct drm_connector *connector)
 {
+	struct nv50_display *priv = nv50_display(encoder->dev);
 	struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
-	struct nouveau_device *device = nouveau_dev(encoder->dev);
 	struct nouveau_drm *drm = nouveau_drm(encoder->dev);
-	enum drm_connector_status status = connector_status_disconnected;
-	uint32_t dpms_state, load_pattern, load_state;
-	int or = nv_encoder->or;
-
-	nv_wr32(device, NV50_PDISPLAY_DAC_CLK_CTRL1(or), 0x00000001);
-	dpms_state = nv_rd32(device, NV50_PDISPLAY_DAC_DPMS_CTRL(or));
-
-	nv_wr32(device, NV50_PDISPLAY_DAC_DPMS_CTRL(or),
-		0x00150000 | NV50_PDISPLAY_DAC_DPMS_CTRL_PENDING);
-	if (!nv_wait(device, NV50_PDISPLAY_DAC_DPMS_CTRL(or),
-		     NV50_PDISPLAY_DAC_DPMS_CTRL_PENDING, 0)) {
-		NV_ERROR(drm, "timeout: DAC_DPMS_CTRL_PENDING(%d) == 0\n", or);
-		NV_ERROR(drm, "DAC_DPMS_CTRL(%d) = 0x%08x\n", or,
-			  nv_rd32(device, NV50_PDISPLAY_DAC_DPMS_CTRL(or)));
-		return status;
-	}
-
-	/* Use bios provided value if possible. */
-	if (drm->vbios.dactestval) {
-		load_pattern = drm->vbios.dactestval;
-		NV_DEBUG(drm, "Using bios provided load_pattern of %d\n",
-			  load_pattern);
-	} else {
-		load_pattern = 340;
-		NV_DEBUG(drm, "Using default load_pattern of %d\n",
-			 load_pattern);
-	}
-
-	nv_wr32(device, NV50_PDISPLAY_DAC_LOAD_CTRL(or),
-		NV50_PDISPLAY_DAC_LOAD_CTRL_ACTIVE | load_pattern);
-	mdelay(45); /* give it some time to process */
-	load_state = nv_rd32(device, NV50_PDISPLAY_DAC_LOAD_CTRL(or));
-
-	nv_wr32(device, NV50_PDISPLAY_DAC_LOAD_CTRL(or), 0);
-	nv_wr32(device, NV50_PDISPLAY_DAC_DPMS_CTRL(or), dpms_state |
-		NV50_PDISPLAY_DAC_DPMS_CTRL_PENDING);
+	int or = nv_encoder->or, ret;
+	u32 load;
 
-	if ((load_state & NV50_PDISPLAY_DAC_LOAD_CTRL_PRESENT) ==
-			  NV50_PDISPLAY_DAC_LOAD_CTRL_PRESENT)
-		status = connector_status_connected;
-
-	if (status == connector_status_connected)
-		NV_DEBUG(drm, "Load was detected on output with or %d\n", or);
+	if (drm->vbios.dactestval)
+		load = drm->vbios.dactestval;
 	else
-		NV_DEBUG(drm, "Load was not detected on output with or %d\n", or);
+		load = 340;
+
+	ret = nv_exec(priv->core, NV50_DISP_DAC_LOAD + or, &load, sizeof(load));
+	if (ret || load != 7)
+		return connector_status_disconnected;
 
-	return status;
+	return connector_status_connected;
 }
 
 static void

drivers/gpu/drm/nouveau/nvd0_display.c

@@ -1176,7 +1176,7 @@ nvd0_dac_detect(struct drm_encoder *encoder, struct drm_connector *connector)
 {
 	struct nvd0_disp *disp = nvd0_disp(encoder->dev);
 	int ret, or = nouveau_encoder(encoder)->or;
-	u32 load;
+	u32 load = 0;
 
 	ret = nv_exec(disp->core, NV50_DISP_DAC_LOAD + or, &load, sizeof(load));
 	if (ret || load != 7)