drm/nouveau/disp: add output class

Will be used to more cleanly implement existing method interfaces that
take some confusing (IEDTkey, inherited from VBIOS, which RM no longer
uses on Ampere) match values to determine which display path to operate
on.

Methods will be protected from racing with supervisor, and from being
called where they shouldn't be (ie. without an OR assigned).

v2:
- use ?: (lyude)
v3:
- fix return code if noacquire() method fails

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

1 files changed, 13 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/include/nvif/outp.h b/drivers/gpu/drm/nouveau/include/nvif/outp.h
new file mode 100644
index 000000000000..64d2131058d5
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/include/nvif/outp.h
@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: MIT */
+#ifndef __NVIF_OUTP_H__
+#define __NVIF_OUTP_H__
+#include <nvif/object.h>
+struct nvif_disp;
+
+struct nvif_outp {
+	struct nvif_object object;
+};
+
+int nvif_outp_ctor(struct nvif_disp *, const char *name, int id, struct nvif_outp *);
+void nvif_outp_dtor(struct nvif_outp *);
+#endif