drm/nouveau/disp: expose conn event class

This removes some now-unnecessary nesting of workqueues.

v2:
- use ?: (lyude)

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>

8 files changed, 75 insertions, 141 deletions

diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/base.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/base.c
index 399195946823..c1d81cf74c57 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/base.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/base.c
@@ -29,7 +29,6 @@
 #include "outp.h"
 
 #include <core/client.h>
-#include <core/notify.h>
 #include <core/ramht.h>
 #include <subdev/bios.h>
 #include <subdev/bios/dcb.h>
@@ -70,54 +69,6 @@ nvkm_disp_vblank(struct nvkm_disp *disp, int head)
 }
 
 static int
-nvkm_disp_hpd_ctor(struct nvkm_object *object, void *data, u32 size,
-		   struct nvkm_notify *notify)
-{
-	struct nvkm_disp *disp =
-		container_of(notify->event, typeof(*disp), hpd);
-	union {
-		struct nvif_notify_conn_req_v0 v0;
-	} *req = data;
-	struct nvkm_outp *outp;
-	int ret = -ENOSYS;
-
-	if (!(ret = nvif_unpack(ret, &data, &size, req->v0, 0, 0, false))) {
-		notify->size = sizeof(struct nvif_notify_conn_rep_v0);
-		list_for_each_entry(outp, &disp->outps, head) {
-			if (ret = -ENXIO, outp->conn->index == req->v0.conn) {
-				if (ret = -ENODEV, outp->conn->hpd.event) {
-					notify->types = req->v0.mask;
-					notify->index = req->v0.conn;
-					ret = 0;
-				}
-				break;
-			}
-		}
-	}
-
-	return ret;
-}
-
-static const struct nvkm_event_func
-nvkm_disp_hpd_func = {
-	.ctor = nvkm_disp_hpd_ctor
-};
-
-int
-nvkm_disp_ntfy(struct nvkm_object *object, u32 type, struct nvkm_event **event)
-{
-	struct nvkm_disp *disp = nvkm_disp(object->engine);
-	switch (type) {
-	case NV04_DISP_NTFY_CONN:
-		*event = &disp->hpd;
-		return 0;
-	default:
-		break;
-	}
-	return -EINVAL;
-}
-
-static int
 nvkm_disp_class_new(struct nvkm_device *device,
 		    const struct nvkm_oclass *oclass, void *data, u32 size,
 		    struct nvkm_object **pobject)
@@ -325,10 +276,6 @@ nvkm_disp_oneinit(struct nvkm_engine *engine)
 		list_add_tail(&outp->conn->head, &disp->conns);
 	}
 
-	ret = nvkm_event_init(&nvkm_disp_hpd_func, subdev, 3, hpd, &disp->hpd);
-	if (ret)
-		return ret;
-
 	if (disp->func->oneinit) {
 		ret = disp->func->oneinit(disp);
 		if (ret)
@@ -376,7 +323,6 @@ nvkm_disp_dtor(struct nvkm_engine *engine)
 	}
 
 	nvkm_event_fini(&disp->vblank);
-	nvkm_event_fini(&disp->hpd);
 
 	while (!list_empty(&disp->conns)) {
 		conn = list_first_entry(&disp->conns, typeof(*conn), head);
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/conn.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/conn.c
index 7ed11801a3ae..fbdae1137864 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/conn.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/conn.c
@@ -29,38 +29,14 @@
 
 #include <nvif/event.h>
 
-static int
-nvkm_conn_hpd(struct nvkm_notify *notify)
-{
-	struct nvkm_conn *conn = container_of(notify, typeof(*conn), hpd);
-	struct nvkm_disp *disp = conn->disp;
-	struct nvkm_gpio *gpio = disp->engine.subdev.device->gpio;
-	const struct nvkm_gpio_ntfy_rep *line = notify->data;
-	struct nvif_notify_conn_rep_v0 rep;
-	int index = conn->index;
-
-	CONN_DBG(conn, "HPD: %d", line->mask);
-
-	if (!nvkm_gpio_get(gpio, 0, DCB_GPIO_UNUSED, conn->hpd.index))
-		rep.mask = NVIF_NOTIFY_CONN_V0_UNPLUG;
-	else
-		rep.mask = NVIF_NOTIFY_CONN_V0_PLUG;
-	rep.version = 0;
-
-	nvkm_event_send(&disp->hpd, rep.mask, index, &rep, sizeof(rep));
-	return NVKM_NOTIFY_KEEP;
-}
-
 void
 nvkm_conn_fini(struct nvkm_conn *conn)
 {
-	nvkm_notify_put(&conn->hpd);
 }
 
 void
 nvkm_conn_init(struct nvkm_conn *conn)
 {
-	nvkm_notify_get(&conn->hpd);
 }
 
 void
@@ -68,7 +44,6 @@ nvkm_conn_del(struct nvkm_conn **pconn)
 {
 	struct nvkm_conn *conn = *pconn;
 	if (conn) {
-		nvkm_notify_fini(&conn->hpd);
 		kfree(*pconn);
 		*pconn = NULL;
 	}
@@ -106,20 +81,6 @@ nvkm_conn_ctor(struct nvkm_disp *disp, int index, struct nvbios_connE *info,
 		}
 
 		conn->info.hpd = func.line;
-
-		ret = nvkm_notify_init(NULL, &gpio->event, nvkm_conn_hpd,
-				       true, &(struct nvkm_gpio_ntfy_req) {
-					.mask = NVKM_GPIO_TOGGLED,
-					.line = func.line,
-				       },
-				       sizeof(struct nvkm_gpio_ntfy_req),
-				       sizeof(struct nvkm_gpio_ntfy_rep),
-				       &conn->hpd);
-		if (ret) {
-			CONN_ERR(conn, "func %02x failed, %d", info->hpd, ret);
-		} else {
-			CONN_DBG(conn, "func %02x (HPD)", info->hpd);
-		}
 	}
 }
 
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/conn.h b/drivers/gpu/drm/nouveau/nvkm/engine/disp/conn.h
index f109634ce5ca..a0600e72b0ec 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/conn.h
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/conn.h
@@ -3,7 +3,6 @@
 #define __NVKM_DISP_CONN_H__
 #include "priv.h"
 
-#include <core/notify.h>
 #include <subdev/bios.h>
 #include <subdev/bios/conn.h>
 
@@ -12,8 +11,6 @@ struct nvkm_conn {
 	int index;
 	struct nvbios_connE info;
 
-	struct nvkm_notify hpd;
-
 	struct list_head head;
 
 	struct nvkm_object object;
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/dp.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/dp.c
index 730c3a6f3362..40c8ea43c42f 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/dp.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/dp.c
@@ -738,31 +738,9 @@ nvkm_dp_enable(struct nvkm_outp *outp, bool auxpwr)
 	}
 }
 
-static int
-nvkm_dp_hpd(struct nvkm_notify *notify)
-{
-	const struct nvkm_i2c_ntfy_rep *line = notify->data;
-	struct nvkm_outp *outp = container_of(notify, typeof(*outp), dp.hpd);
-	struct nvkm_conn *conn = outp->conn;
-	struct nvkm_disp *disp = outp->disp;
-	struct nvif_notify_conn_rep_v0 rep = {};
-
-	OUTP_DBG(outp, "HPD: %d", line->mask);
-	if (line->mask & NVKM_I2C_IRQ)
-		rep.mask |= NVIF_NOTIFY_CONN_V0_IRQ;
-	if (line->mask & NVKM_I2C_UNPLUG)
-		rep.mask |= NVIF_NOTIFY_CONN_V0_UNPLUG;
-	if (line->mask & NVKM_I2C_PLUG)
-		rep.mask |= NVIF_NOTIFY_CONN_V0_PLUG;
-
-	nvkm_event_send(&disp->hpd, rep.mask, conn->index, &rep, sizeof(rep));
-	return NVKM_NOTIFY_KEEP;
-}
-
 static void
 nvkm_dp_fini(struct nvkm_outp *outp)
 {
-	nvkm_notify_put(&outp->dp.hpd);
 	nvkm_dp_enable(outp, false);
 }
 
@@ -770,14 +748,11 @@ static void
 nvkm_dp_init(struct nvkm_outp *outp)
 {
 	nvkm_dp_enable(outp, outp->dp.enabled);
-	nvkm_notify_put(&outp->conn->hpd);
-	nvkm_notify_get(&outp->dp.hpd);
 }
 
 static void *
 nvkm_dp_dtor(struct nvkm_outp *outp)
 {
-	nvkm_notify_fini(&outp->dp.hpd);
 	return outp;
 }
 
@@ -826,21 +801,6 @@ nvkm_dp_new(struct nvkm_disp *disp, int index, struct dcb_output *dcbE, struct n
 
 	OUTP_DBG(outp, "bios dp %02x %02x %02x %02x", outp->dp.version, hdr, cnt, len);
 
-	/* hotplug detect, replaces gpio-based mechanism with aux events */
-	ret = nvkm_notify_init(NULL, &i2c->event, nvkm_dp_hpd, true,
-			       &(struct nvkm_i2c_ntfy_req) {
-				.mask = NVKM_I2C_PLUG | NVKM_I2C_UNPLUG |
-					NVKM_I2C_IRQ,
-				.port = outp->dp.aux->id,
-			       },
-			       sizeof(struct nvkm_i2c_ntfy_req),
-			       sizeof(struct nvkm_i2c_ntfy_rep),
-			       &outp->dp.hpd);
-	if (ret) {
-		OUTP_ERR(outp, "error monitoring aux hpd: %d", ret);
-		return ret;
-	}
-
 	mutex_init(&outp->dp.mutex);
 	atomic_set(&outp->dp.lt.done, 0);
 	return 0;
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/outp.h b/drivers/gpu/drm/nouveau/nvkm/engine/disp/outp.h
index 66def8ae3165..b7631c1ab242 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/outp.h
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/outp.h
@@ -2,7 +2,6 @@
 #ifndef __NVKM_DISP_OUTP_H__
 #define __NVKM_DISP_OUTP_H__
 #include "priv.h"
-#include <core/notify.h>
 
 #include <subdev/bios.h>
 #include <subdev/bios/dcb.h>
@@ -38,7 +37,6 @@ struct nvkm_outp {
 
 			struct nvkm_i2c_aux *aux;
 
-			struct nvkm_notify hpd;
 			bool enabled;
 			bool aux_pwr;
 			bool aux_pwr_pu;
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/priv.h b/drivers/gpu/drm/nouveau/nvkm/engine/disp/priv.h
index a98b57f82fe7..ec5292a8f3c8 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/priv.h
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/priv.h
@@ -42,8 +42,6 @@ struct nvkm_disp_func {
 	} user[];
 };
 
-int  nvkm_disp_ntfy(struct nvkm_object *, u32, struct nvkm_event **);
-
 int nv50_disp_oneinit(struct nvkm_disp *);
 int nv50_disp_init(struct nvkm_disp *);
 void nv50_disp_fini(struct nvkm_disp *);
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/uconn.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/uconn.c
index fd9f18144c26..dad942be6679 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/uconn.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/uconn.c
@@ -21,12 +21,86 @@
  */
 #define nvkm_uconn(p) container_of((p), struct nvkm_conn, object)
 #include "conn.h"
+#include "outp.h"
 
+#include <core/client.h>
+#include <core/event.h>
 #include <subdev/gpio.h>
+#include <subdev/i2c.h>
 
 #include <nvif/if0011.h>
 
 static int
+nvkm_uconn_uevent_aux(struct nvkm_object *object, u64 token, u32 bits)
+{
+	union nvif_conn_event_args args;
+
+	args.v0.version = 0;
+	args.v0.types = 0;
+	if (bits & NVKM_I2C_PLUG)
+		args.v0.types |= NVIF_CONN_EVENT_V0_PLUG;
+	if (bits & NVKM_I2C_UNPLUG)
+		args.v0.types |= NVIF_CONN_EVENT_V0_UNPLUG;
+	if (bits & NVKM_I2C_IRQ)
+		args.v0.types |= NVIF_CONN_EVENT_V0_IRQ;
+
+	return object->client->event(token, &args, sizeof(args.v0));
+}
+
+static int
+nvkm_uconn_uevent_gpio(struct nvkm_object *object, u64 token, u32 bits)
+{
+	union nvif_conn_event_args args;
+
+	args.v0.version = 0;
+	args.v0.types = 0;
+	if (bits & NVKM_GPIO_HI)
+		args.v0.types |= NVIF_CONN_EVENT_V0_PLUG;
+	if (bits & NVKM_GPIO_LO)
+		args.v0.types |= NVIF_CONN_EVENT_V0_UNPLUG;
+
+	return object->client->event(token, &args, sizeof(args.v0));
+}
+
+static int
+nvkm_uconn_uevent(struct nvkm_object *object, void *argv, u32 argc, struct nvkm_uevent *uevent)
+{
+	struct nvkm_conn *conn = nvkm_uconn(object);
+	struct nvkm_device *device = conn->disp->engine.subdev.device;
+	struct nvkm_outp *outp;
+	union nvif_conn_event_args *args = argv;
+	u64 bits = 0;
+
+	if (!uevent) {
+		if (conn->info.hpd == DCB_GPIO_UNUSED)
+			return -ENOSYS;
+		return 0;
+	}
+
+	if (argc != sizeof(args->v0) || args->v0.version != 0)
+		return -ENOSYS;
+
+	list_for_each_entry(outp, &conn->disp->outps, head) {
+		if (outp->info.connector == conn->index && outp->dp.aux) {
+			if (args->v0.types & NVIF_CONN_EVENT_V0_PLUG  ) bits |= NVKM_I2C_PLUG;
+			if (args->v0.types & NVIF_CONN_EVENT_V0_UNPLUG) bits |= NVKM_I2C_UNPLUG;
+			if (args->v0.types & NVIF_CONN_EVENT_V0_IRQ   ) bits |= NVKM_I2C_IRQ;
+
+			return nvkm_uevent_add(uevent, &device->i2c->event, outp->dp.aux->id, bits,
+					       nvkm_uconn_uevent_aux);
+		}
+	}
+
+	if (args->v0.types & NVIF_CONN_EVENT_V0_PLUG  ) bits |= NVKM_GPIO_HI;
+	if (args->v0.types & NVIF_CONN_EVENT_V0_UNPLUG) bits |= NVKM_GPIO_LO;
+	if (args->v0.types & NVIF_CONN_EVENT_V0_IRQ)
+		return -EINVAL;
+
+	return nvkm_uevent_add(uevent, &device->gpio->event, conn->info.hpd, bits,
+			       nvkm_uconn_uevent_gpio);
+}
+
+static int
 nvkm_uconn_mthd_hpd_status(struct nvkm_conn *conn, void *argv, u32 argc)
 {
 	struct nvkm_gpio *gpio = conn->disp->engine.subdev.device->gpio;
@@ -82,6 +156,7 @@ static const struct nvkm_object_func
 nvkm_uconn = {
 	.dtor = nvkm_uconn_dtor,
 	.mthd = nvkm_uconn_mthd,
+	.uevent = nvkm_uconn_uevent,
 };
 
 int
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/udisp.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/udisp.c
index c9bd32220fe1..0268d1d75805 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/udisp.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/udisp.c
@@ -74,7 +74,6 @@ nvkm_udisp_dtor(struct nvkm_object *object)
 static const struct nvkm_object_func
 nvkm_udisp = {
 	.dtor = nvkm_udisp_dtor,
-	.ntfy = nvkm_disp_ntfy,
 	.sclass = nvkm_udisp_sclass,
 };