diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/engine/disp/uhead.c')
-rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/engine/disp/uhead.c | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/uhead.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/uhead.c new file mode 100644 index 000000000..f072cec16 --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/uhead.c @@ -0,0 +1,127 @@ +/* + * Copyright 2021 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. + */ +#define nvkm_uhead(p) container_of((p), struct nvkm_head, object) +#include "head.h" +#include <core/event.h> + +#include <nvif/if0013.h> + +#include <nvif/event.h> + +static int +nvkm_uhead_uevent(struct nvkm_object *object, void *argv, u32 argc, struct nvkm_uevent *uevent) +{ + struct nvkm_head *head = nvkm_uhead(object); + union nvif_head_event_args *args = argv; + + if (!uevent) + return 0; + if (argc != sizeof(args->vn)) + return -ENOSYS; + + return nvkm_uevent_add(uevent, &head->disp->vblank, head->id, + NVKM_DISP_HEAD_EVENT_VBLANK, NULL); +} + +static int +nvkm_uhead_mthd_scanoutpos(struct nvkm_head *head, void *argv, u32 argc) +{ + union nvif_head_scanoutpos_args *args = argv; + + if (argc != sizeof(args->v0) || args->v0.version != 0) + return -ENOSYS; + + head->func->state(head, &head->arm); + args->v0.vtotal = head->arm.vtotal; + args->v0.vblanks = head->arm.vblanks; + args->v0.vblanke = head->arm.vblanke; + args->v0.htotal = head->arm.htotal; + args->v0.hblanks = head->arm.hblanks; + args->v0.hblanke = head->arm.hblanke; + + /* We don't support reading htotal/vtotal on pre-NV50 VGA, + * so we have to give up and trigger the timestamping + * fallback in the drm core. + */ + if (!args->v0.vtotal || !args->v0.htotal) + return -ENOTSUPP; + + args->v0.time[0] = ktime_to_ns(ktime_get()); + head->func->rgpos(head, &args->v0.hline, &args->v0.vline); + args->v0.time[1] = ktime_to_ns(ktime_get()); + return 0; +} + +static int +nvkm_uhead_mthd(struct nvkm_object *object, u32 mthd, void *argv, u32 argc) +{ + struct nvkm_head *head = nvkm_uhead(object); + + switch (mthd) { + case NVIF_HEAD_V0_SCANOUTPOS: return nvkm_uhead_mthd_scanoutpos(head, argv, argc); + default: + return -EINVAL; + } +} + +static void * +nvkm_uhead_dtor(struct nvkm_object *object) +{ + struct nvkm_head *head = nvkm_uhead(object); + struct nvkm_disp *disp = head->disp; + + spin_lock(&disp->client.lock); + head->object.func = NULL; + spin_unlock(&disp->client.lock); + return NULL; +} + +static const struct nvkm_object_func +nvkm_uhead = { + .dtor = nvkm_uhead_dtor, + .mthd = nvkm_uhead_mthd, + .uevent = nvkm_uhead_uevent, +}; + +int +nvkm_uhead_new(const struct nvkm_oclass *oclass, void *argv, u32 argc, struct nvkm_object **pobject) +{ + struct nvkm_disp *disp = nvkm_udisp(oclass->parent); + struct nvkm_head *head; + union nvif_head_args *args = argv; + int ret; + + if (argc != sizeof(args->v0) || args->v0.version != 0) + return -ENOSYS; + if (!(head = nvkm_head_find(disp, args->v0.id))) + return -EINVAL; + + ret = -EBUSY; + spin_lock(&disp->client.lock); + if (!head->object.func) { + nvkm_object_ctor(&nvkm_uhead, oclass, &head->object); + *pobject = &head->object; + ret = 0; + } + spin_unlock(&disp->client.lock); + return ret; +} |