1 files changed, 338 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/outp.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/outp.c
new file mode 100644
index 000000000..6094805fb
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/outp.c
@@ -0,0 +1,338 @@
+/*
+ * Copyright 2014 Red Hat Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: Ben Skeggs
+ */
+#include "outp.h"
+#include "dp.h"
+#include "ior.h"
+
+#include <subdev/bios.h>
+#include <subdev/bios/dcb.h>
+#include <subdev/i2c.h>
+
+void
+nvkm_outp_route(struct nvkm_disp *disp)
+{
+	struct nvkm_outp *outp;
+	struct nvkm_ior *ior;
+
+	list_for_each_entry(ior, &disp->iors, head) {
+		if ((outp = ior->arm.outp) && ior->arm.outp != ior->asy.outp) {
+			OUTP_DBG(outp, "release %s", ior->name);
+			if (ior->func->route.set)
+				ior->func->route.set(outp, NULL);
+			ior->arm.outp = NULL;
+		}
+	}
+
+	list_for_each_entry(ior, &disp->iors, head) {
+		if ((outp = ior->asy.outp)) {
+			OUTP_DBG(outp, "acquire %s", ior->name);
+			if (ior->asy.outp != ior->arm.outp) {
+				if (ior->func->route.set)
+					ior->func->route.set(outp, ior);
+				ior->arm.outp = ior->asy.outp;
+			}
+		}
+	}
+}
+
+static enum nvkm_ior_proto
+nvkm_outp_xlat(struct nvkm_outp *outp, enum nvkm_ior_type *type)
+{
+	switch (outp->info.location) {
+	case 0:
+		switch (outp->info.type) {
+		case DCB_OUTPUT_ANALOG: *type = DAC; return  CRT;
+		case DCB_OUTPUT_TV    : *type = DAC; return   TV;
+		case DCB_OUTPUT_TMDS  : *type = SOR; return TMDS;
+		case DCB_OUTPUT_LVDS  : *type = SOR; return LVDS;
+		case DCB_OUTPUT_DP    : *type = SOR; return   DP;
+		default:
+			break;
+		}
+		break;
+	case 1:
+		switch (outp->info.type) {
+		case DCB_OUTPUT_TMDS: *type = PIOR; return TMDS;
+		case DCB_OUTPUT_DP  : *type = PIOR; return TMDS; /* not a bug */
+		default:
+			break;
+		}
+		break;
+	default:
+		break;
+	}
+	WARN_ON(1);
+	return UNKNOWN;
+}
+
+void
+nvkm_outp_release(struct nvkm_outp *outp, u8 user)
+{
+	struct nvkm_ior *ior = outp->ior;
+	OUTP_TRACE(outp, "release %02x &= %02x %p", outp->acquired, ~user, ior);
+	if (ior) {
+		outp->acquired &= ~user;
+		if (!outp->acquired) {
+			if (outp->func->release && outp->ior)
+				outp->func->release(outp);
+			outp->ior->asy.outp = NULL;
+			outp->ior = NULL;
+		}
+	}
+}
+
+static inline int
+nvkm_outp_acquire_ior(struct nvkm_outp *outp, u8 user, struct nvkm_ior *ior)
+{
+	outp->ior = ior;
+	outp->ior->asy.outp = outp;
+	outp->ior->asy.link = outp->info.sorconf.link;
+	outp->acquired |= user;
+	return 0;
+}
+
+static inline int
+nvkm_outp_acquire_hda(struct nvkm_outp *outp, enum nvkm_ior_type type,
+		      u8 user, bool hda)
+{
+	struct nvkm_ior *ior;
+
+	/* Failing that, a completely unused OR is the next best thing. */
+	list_for_each_entry(ior, &outp->disp->iors, head) {
+		if (!ior->identity && ior->hda == hda &&
+		    !ior->asy.outp && ior->type == type && !ior->arm.outp &&
+		    (ior->func->route.set || ior->id == __ffs(outp->info.or)))
+			return nvkm_outp_acquire_ior(outp, user, ior);
+	}
+
+	/* Last resort is to assign an OR that's already active on HW,
+	 * but will be released during the next modeset.
+	 */
+	list_for_each_entry(ior, &outp->disp->iors, head) {
+		if (!ior->identity && ior->hda == hda &&
+		    !ior->asy.outp && ior->type == type &&
+		    (ior->func->route.set || ior->id == __ffs(outp->info.or)))
+			return nvkm_outp_acquire_ior(outp, user, ior);
+	}
+
+	return -ENOSPC;
+}
+
+int
+nvkm_outp_acquire(struct nvkm_outp *outp, u8 user, bool hda)
+{
+	struct nvkm_ior *ior = outp->ior;
+	enum nvkm_ior_proto proto;
+	enum nvkm_ior_type type;
+
+	OUTP_TRACE(outp, "acquire %02x |= %02x %p", outp->acquired, user, ior);
+	if (ior) {
+		outp->acquired |= user;
+		return 0;
+	}
+
+	/* Lookup a compatible, and unused, OR to assign to the device. */
+	proto = nvkm_outp_xlat(outp, &type);
+	if (proto == UNKNOWN)
+		return -ENOSYS;
+
+	/* Deal with panels requiring identity-mapped SOR assignment. */
+	if (outp->identity) {
+		ior = nvkm_ior_find(outp->disp, SOR, ffs(outp->info.or) - 1);
+		if (WARN_ON(!ior))
+			return -ENOSPC;
+		return nvkm_outp_acquire_ior(outp, user, ior);
+	}
+
+	/* First preference is to reuse the OR that is currently armed
+	 * on HW, if any, in order to prevent unnecessary switching.
+	 */
+	list_for_each_entry(ior, &outp->disp->iors, head) {
+		if (!ior->identity && !ior->asy.outp && ior->arm.outp == outp) {
+			/*XXX: For various complicated reasons, we can't outright switch
+			 *     the boot-time OR on the first modeset without some fairly
+			 *     invasive changes.
+			 *
+			 *     The systems that were fixed by modifying the OR selection
+			 *     code to account for HDA support shouldn't regress here as
+			 *     the HDA-enabled ORs match the relevant output's pad macro
+			 *     index, and the firmware seems to select an OR this way.
+			 *
+			 *     This warning is to make it obvious if that proves wrong.
+			 */
+			WARN_ON(hda && !ior->hda);
+			return nvkm_outp_acquire_ior(outp, user, ior);
+		}
+	}
+
+	/* If we don't need HDA, first try to acquire an OR that doesn't
+	 * support it to leave free the ones that do.
+	 */
+	if (!hda) {
+		if (!nvkm_outp_acquire_hda(outp, type, user, false))
+			return 0;
+
+		/* Use a HDA-supporting SOR anyway. */
+		return nvkm_outp_acquire_hda(outp, type, user, true);
+	}
+
+	/* We want HDA, try to acquire an OR that supports it. */
+	if (!nvkm_outp_acquire_hda(outp, type, user, true))
+		return 0;
+
+	/* There weren't any free ORs that support HDA, grab one that
+	 * doesn't and at least allow display to work still.
+	 */
+	return nvkm_outp_acquire_hda(outp, type, user, false);
+}
+
+void
+nvkm_outp_fini(struct nvkm_outp *outp)
+{
+	if (outp->func->fini)
+		outp->func->fini(outp);
+}
+
+static void
+nvkm_outp_init_route(struct nvkm_outp *outp)
+{
+	struct nvkm_disp *disp = outp->disp;
+	enum nvkm_ior_proto proto;
+	enum nvkm_ior_type type;
+	struct nvkm_ior *ior;
+	int id, link;
+
+	/* Find any OR from the class that is able to support this device. */
+	proto = nvkm_outp_xlat(outp, &type);
+	if (proto == UNKNOWN)
+		return;
+
+	ior = nvkm_ior_find(disp, type, -1);
+	if (!ior) {
+		WARN_ON(1);
+		return;
+	}
+
+	/* Determine the specific OR, if any, this device is attached to. */
+	if (ior->func->route.get) {
+		id = ior->func->route.get(outp, &link);
+		if (id < 0) {
+			OUTP_DBG(outp, "no route");
+			return;
+		}
+	} else {
+		/* Prior to DCB 4.1, this is hardwired like so. */
+		id   = ffs(outp->info.or) - 1;
+		link = (ior->type == SOR) ? outp->info.sorconf.link : 0;
+	}
+
+	ior = nvkm_ior_find(disp, type, id);
+	if (!ior) {
+		WARN_ON(1);
+		return;
+	}
+
+	/* Determine if the OR is already configured for this device. */
+	ior->func->state(ior, &ior->arm);
+	if (!ior->arm.head || ior->arm.proto != proto) {
+		OUTP_DBG(outp, "no heads (%x %d %d)", ior->arm.head,
+			 ior->arm.proto, proto);
+
+		/* The EFI GOP driver on Ampere can leave unused DP links routed,
+		 * which we don't expect.  The DisableLT IED script *should* get
+		 * us back to where we need to be.
+		 */
+		if (ior->func->route.get && !ior->arm.head && outp->info.type == DCB_OUTPUT_DP)
+			nvkm_dp_disable(outp, ior);
+
+		return;
+	}
+
+	OUTP_DBG(outp, "on %s link %x", ior->name, ior->arm.link);
+	ior->arm.outp = outp;
+}
+
+void
+nvkm_outp_init(struct nvkm_outp *outp)
+{
+	nvkm_outp_init_route(outp);
+	if (outp->func->init)
+		outp->func->init(outp);
+}
+
+void
+nvkm_outp_del(struct nvkm_outp **poutp)
+{
+	struct nvkm_outp *outp = *poutp;
+	if (outp && !WARN_ON(!outp->func)) {
+		if (outp->func->dtor)
+			*poutp = outp->func->dtor(outp);
+		kfree(*poutp);
+		*poutp = NULL;
+	}
+}
+
+int
+nvkm_outp_new_(const struct nvkm_outp_func *func, struct nvkm_disp *disp,
+	       int index, struct dcb_output *dcbE, struct nvkm_outp **poutp)
+{
+	struct nvkm_i2c *i2c = disp->engine.subdev.device->i2c;
+	struct nvkm_outp *outp;
+	enum nvkm_ior_proto proto;
+	enum nvkm_ior_type type;
+
+	if (!(outp = *poutp = kzalloc(sizeof(*outp), GFP_KERNEL)))
+		return -ENOMEM;
+
+	outp->func = func;
+	outp->disp = disp;
+	outp->index = index;
+	outp->info = *dcbE;
+	outp->i2c = nvkm_i2c_bus_find(i2c, dcbE->i2c_index);
+
+	OUTP_DBG(outp, "type %02x loc %d or %d link %d con %x "
+		       "edid %x bus %d head %x",
+		 outp->info.type, outp->info.location, outp->info.or,
+		 outp->info.type >= 2 ? outp->info.sorconf.link : 0,
+		 outp->info.connector, outp->info.i2c_index,
+		 outp->info.bus, outp->info.heads);
+
+	/* Cull output paths we can't map to an output resource. */
+	proto = nvkm_outp_xlat(outp, &type);
+	if (proto == UNKNOWN)
+		return -ENODEV;
+
+	return 0;
+}
+
+static const struct nvkm_outp_func
+nvkm_outp = {
+};
+
+int
+nvkm_outp_new(struct nvkm_disp *disp, int index, struct dcb_output *dcbE,
+	      struct nvkm_outp **poutp)
+{
+	return nvkm_outp_new_(&nvkm_outp, disp, index, dcbE, poutp);
+}