drm/nouveau/kms/nv50: separate out viewport commit

This commit separates the calculation of EVO state from the commit, in
order to make the same code useful for atomic modesetting.

The legacy interfaces have been wrapped on top of them.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/nouveau_connector.h

@@ -124,6 +124,7 @@ struct nouveau_conn_atom {
 			u32 hborder;
 			u32 vborder;
 		} underscan;
+		bool full;
 	} scaler;
 
 	struct {

drivers/gpu/drm/nouveau/nv50_display.c

@@ -71,6 +71,13 @@
 struct nv50_head_atom {
 	struct drm_crtc_state state;
 
+	struct {
+		u16 iW;
+		u16 iH;
+		u16 oW;
+		u16 oH;
+	} view;
+
 	struct nv50_head_mode {
 		bool interlace;
 		u32 clock;
@@ -1065,6 +1072,34 @@ nv50_head_mode(struct nv50_head *head, struct nv50_head_atom *asyh)
 	}
 }
 
+static void
+nv50_head_view(struct nv50_head *head, struct nv50_head_atom *asyh)
+{
+	struct nv50_dmac *core = &nv50_disp(head->base.base.dev)->mast.base;
+	u32 *push;
+	if ((push = evo_wait(core, 10))) {
+		if (core->base.user.oclass < GF110_DISP_CORE_CHANNEL_DMA) {
+			evo_mthd(push, 0x08a4 + (head->base.index * 0x400), 1);
+			evo_data(push, 0x00000000);
+			evo_mthd(push, 0x08c8 + (head->base.index * 0x400), 1);
+			evo_data(push, (asyh->view.iH << 16) | asyh->view.iW);
+			evo_mthd(push, 0x08d8 + (head->base.index * 0x400), 2);
+			evo_data(push, (asyh->view.oH << 16) | asyh->view.oW);
+			evo_data(push, (asyh->view.oH << 16) | asyh->view.oW);
+		} else {
+			evo_mthd(push, 0x0494 + (head->base.index * 0x300), 1);
+			evo_data(push, 0x00000000);
+			evo_mthd(push, 0x04b8 + (head->base.index * 0x300), 1);
+			evo_data(push, (asyh->view.iH << 16) | asyh->view.iW);
+			evo_mthd(push, 0x04c0 + (head->base.index * 0x300), 3);
+			evo_data(push, (asyh->view.oH << 16) | asyh->view.oW);
+			evo_data(push, (asyh->view.oH << 16) | asyh->view.oW);
+			evo_data(push, (asyh->view.oH << 16) | asyh->view.oW);
+		}
+		evo_kick(push, core);
+	}
+}
+
 static void
 nv50_head_flush_clr(struct nv50_head *head, struct nv50_head_atom *asyh, bool y)
 {
@@ -1079,6 +1114,7 @@ nv50_head_flush_clr(struct nv50_head *head, struct nv50_head_atom *asyh, bool y)
 static void
 nv50_head_flush_set(struct nv50_head *head, struct nv50_head_atom *asyh)
 {
+	if (asyh->set.view   ) nv50_head_view    (head, asyh);
 	if (asyh->set.mode   ) nv50_head_mode    (head, asyh);
 	if (asyh->set.core   ) nv50_head_lut_set (head, asyh);
 	if (asyh->set.core   ) nv50_head_core_set(head, asyh);
@@ -1087,6 +1123,83 @@ nv50_head_flush_set(struct nv50_head *head, struct nv50_head_atom *asyh)
 	if (asyh->set.ovly   ) nv50_head_ovly    (head, asyh);
 }
 
+static void
+nv50_head_atomic_check_view(struct nv50_head_atom *armh,
+			    struct nv50_head_atom *asyh,
+			    struct nouveau_conn_atom *asyc)
+{
+	struct drm_connector *connector = asyc->state.connector;
+	struct drm_display_mode *omode = &asyh->state.adjusted_mode;
+	struct drm_display_mode *umode = &asyh->state.mode;
+	int mode = asyc->scaler.mode;
+	struct edid *edid;
+
+	if (connector->edid_blob_ptr)
+		edid = (struct edid *)connector->edid_blob_ptr->data;
+	else
+		edid = NULL;
+
+	if (!asyc->scaler.full) {
+		if (mode == DRM_MODE_SCALE_NONE)
+			omode = umode;
+	} else {
+		/* Non-EDID LVDS/eDP mode. */
+		mode = DRM_MODE_SCALE_FULLSCREEN;
+	}
+
+	asyh->view.iW = umode->hdisplay;
+	asyh->view.iH = umode->vdisplay;
+	asyh->view.oW = omode->hdisplay;
+	asyh->view.oH = omode->vdisplay;
+	if (omode->flags & DRM_MODE_FLAG_DBLSCAN)
+		asyh->view.oH *= 2;
+
+	/* Add overscan compensation if necessary, will keep the aspect
+	 * ratio the same as the backend mode unless overridden by the
+	 * user setting both hborder and vborder properties.
+	 */
+	if ((asyc->scaler.underscan.mode == UNDERSCAN_ON ||
+	    (asyc->scaler.underscan.mode == UNDERSCAN_AUTO &&
+	     drm_detect_hdmi_monitor(edid)))) {
+		u32 bX = asyc->scaler.underscan.hborder;
+		u32 bY = asyc->scaler.underscan.vborder;
+		u32 r = (asyh->view.oH << 19) / asyh->view.oW;
+
+		if (bX) {
+			asyh->view.oW -= (bX * 2);
+			if (bY) asyh->view.oH -= (bY * 2);
+			else    asyh->view.oH  = ((asyh->view.oW * r) + (r / 2)) >> 19;
+		} else {
+			asyh->view.oW -= (asyh->view.oW >> 4) + 32;
+			if (bY) asyh->view.oH -= (bY * 2);
+			else    asyh->view.oH  = ((asyh->view.oW * r) + (r / 2)) >> 19;
+		}
+	}
+
+	/* Handle CENTER/ASPECT scaling, taking into account the areas
+	 * removed already for overscan compensation.
+	 */
+	switch (mode) {
+	case DRM_MODE_SCALE_CENTER:
+		asyh->view.oW = min((u16)umode->hdisplay, asyh->view.oW);
+		asyh->view.oH = min((u16)umode->vdisplay, asyh->view.oH);
+		/* fall-through */
+	case DRM_MODE_SCALE_ASPECT:
+		if (asyh->view.oH < asyh->view.oW) {
+			u32 r = (asyh->view.iW << 19) / asyh->view.iH;
+			asyh->view.oW = ((asyh->view.oH * r) + (r / 2)) >> 19;
+		} else {
+			u32 r = (asyh->view.iH << 19) / asyh->view.iW;
+			asyh->view.oH = ((asyh->view.oW * r) + (r / 2)) >> 19;
+		}
+		break;
+	default:
+		break;
+	}
+
+	asyh->set.view = true;
+}
+
 static void
 nv50_head_atomic_check_mode(struct nv50_head *head, struct nv50_head_atom *asyh)
 {
@@ -1264,105 +1377,27 @@ nv50_crtc_set_dither(struct nouveau_crtc *nv_crtc, bool update)
 static int
 nv50_crtc_set_scale(struct nouveau_crtc *nv_crtc, bool update)
 {
-	struct nv50_mast *mast = nv50_mast(nv_crtc->base.dev);
-	struct drm_display_mode *omode, *umode = &nv_crtc->base.mode;
+	struct nv50_head *head = nv50_head(&nv_crtc->base);
+	struct nv50_head_atom *asyh = &head->asy;
 	struct drm_crtc *crtc = &nv_crtc->base;
 	struct nouveau_connector *nv_connector;
-	int mode = DRM_MODE_SCALE_NONE;
-	u32 oX, oY, *push;
+	struct nouveau_conn_atom asyc;
 
-	/* start off at the resolution we programmed the crtc for, this
-	 * effectively handles NONE/FULL scaling
-	 */
 	nv_connector = nouveau_crtc_connector_get(nv_crtc);
-	if (nv_connector && nv_connector->native_mode) {
-		mode = nv_connector->scaling_mode;
-		if (nv_connector->scaling_full) /* non-EDID LVDS/eDP mode */
-			mode = DRM_MODE_SCALE_FULLSCREEN;
-	}
-
-	if (mode != DRM_MODE_SCALE_NONE)
-		omode = nv_connector->native_mode;
-	else
-		omode = umode;
-
-	oX = omode->hdisplay;
-	oY = omode->vdisplay;
-	if (omode->flags & DRM_MODE_FLAG_DBLSCAN)
-		oY *= 2;
-
-	/* add overscan compensation if necessary, will keep the aspect
-	 * ratio the same as the backend mode unless overridden by the
-	 * user setting both hborder and vborder properties.
-	 */
-	if (nv_connector && ( nv_connector->underscan == UNDERSCAN_ON ||
-			     (nv_connector->underscan == UNDERSCAN_AUTO &&
-			      drm_detect_hdmi_monitor(nv_connector->edid)))) {
-		u32 bX = nv_connector->underscan_hborder;
-		u32 bY = nv_connector->underscan_vborder;
-		u32 aspect = (oY << 19) / oX;
-
-		if (bX) {
-			oX -= (bX * 2);
-			if (bY) oY -= (bY * 2);
-			else    oY  = ((oX * aspect) + (aspect / 2)) >> 19;
-		} else {
-			oX -= (oX >> 4) + 32;
-			if (bY) oY -= (bY * 2);
-			else    oY  = ((oX * aspect) + (aspect / 2)) >> 19;
-		}
-	}
 
-	/* handle CENTER/ASPECT scaling, taking into account the areas
-	 * removed already for overscan compensation
-	 */
-	switch (mode) {
-	case DRM_MODE_SCALE_CENTER:
-		oX = min((u32)umode->hdisplay, oX);
-		oY = min((u32)umode->vdisplay, oY);
-		/* fall-through */
-	case DRM_MODE_SCALE_ASPECT:
-		if (oY < oX) {
-			u32 aspect = (umode->hdisplay << 19) / umode->vdisplay;
-			oX = ((oY * aspect) + (aspect / 2)) >> 19;
-		} else {
-			u32 aspect = (umode->vdisplay << 19) / umode->hdisplay;
-			oY = ((oX * aspect) + (aspect / 2)) >> 19;
-		}
-		break;
-	default:
-		break;
-	}
-
-	push = evo_wait(mast, 8);
-	if (push) {
-		if (nv50_vers(mast) < GF110_DISP_CORE_CHANNEL_DMA) {
-			/*XXX: SCALE_CTRL_ACTIVE??? */
-			evo_mthd(push, 0x08d8 + (nv_crtc->index * 0x400), 2);
-			evo_data(push, (oY << 16) | oX);
-			evo_data(push, (oY << 16) | oX);
-			evo_mthd(push, 0x08a4 + (nv_crtc->index * 0x400), 1);
-			evo_data(push, 0x00000000);
-			evo_mthd(push, 0x08c8 + (nv_crtc->index * 0x400), 1);
-			evo_data(push, umode->vdisplay << 16 | umode->hdisplay);
-		} else {
-			evo_mthd(push, 0x04c0 + (nv_crtc->index * 0x300), 3);
-			evo_data(push, (oY << 16) | oX);
-			evo_data(push, (oY << 16) | oX);
-			evo_data(push, (oY << 16) | oX);
-			evo_mthd(push, 0x0494 + (nv_crtc->index * 0x300), 1);
-			evo_data(push, 0x00000000);
-			evo_mthd(push, 0x04b8 + (nv_crtc->index * 0x300), 1);
-			evo_data(push, umode->vdisplay << 16 | umode->hdisplay);
-		}
-
-		evo_kick(push, mast);
+	asyc.state.connector = &nv_connector->base;
+	asyc.scaler.mode = nv_connector->scaling_mode;
+	asyc.scaler.full = nv_connector->scaling_full;
+	asyc.scaler.underscan.mode = nv_connector->underscan;
+	asyc.scaler.underscan.hborder = nv_connector->underscan_hborder;
+	asyc.scaler.underscan.vborder = nv_connector->underscan_vborder;
+	nv50_head_atomic_check(&head->base.base, &asyh->state);
+	nv50_head_atomic_check_view(&head->arm, asyh, &asyc);
+	nv50_head_flush_set(head, asyh);
 
 	if (update) {
 		nv50_display_flip_stop(crtc);
-			nv50_display_flip_next(crtc, crtc->primary->fb,
-					       NULL, 1);
-		}
+		nv50_display_flip_next(crtc, crtc->primary->fb, NULL, 1);
 	}
 
 	return 0;