128 lines
3.7 KiB
C
128 lines
3.7 KiB
C
/*
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* Copyright 2021 Red Hat Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#define nvkm_uhead(p) container_of((p), struct nvkm_head, object)
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#include "head.h"
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#include <core/event.h>
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#include <nvif/if0013.h>
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#include <nvif/event.h>
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static int
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nvkm_uhead_uevent(struct nvkm_object *object, void *argv, u32 argc, struct nvkm_uevent *uevent)
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{
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struct nvkm_head *head = nvkm_uhead(object);
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union nvif_head_event_args *args = argv;
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if (!uevent)
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return 0;
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if (argc != sizeof(args->vn))
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return -ENOSYS;
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return nvkm_uevent_add(uevent, &head->disp->vblank, head->id,
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NVKM_DISP_HEAD_EVENT_VBLANK, NULL);
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}
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static int
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nvkm_uhead_mthd_scanoutpos(struct nvkm_head *head, void *argv, u32 argc)
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{
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union nvif_head_scanoutpos_args *args = argv;
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if (argc != sizeof(args->v0) || args->v0.version != 0)
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return -ENOSYS;
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head->func->state(head, &head->arm);
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args->v0.vtotal = head->arm.vtotal;
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args->v0.vblanks = head->arm.vblanks;
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args->v0.vblanke = head->arm.vblanke;
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args->v0.htotal = head->arm.htotal;
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args->v0.hblanks = head->arm.hblanks;
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args->v0.hblanke = head->arm.hblanke;
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/* We don't support reading htotal/vtotal on pre-NV50 VGA,
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* so we have to give up and trigger the timestamping
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* fallback in the drm core.
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*/
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if (!args->v0.vtotal || !args->v0.htotal)
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return -ENOTSUPP;
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args->v0.time[0] = ktime_to_ns(ktime_get());
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head->func->rgpos(head, &args->v0.hline, &args->v0.vline);
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args->v0.time[1] = ktime_to_ns(ktime_get());
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return 0;
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}
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static int
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nvkm_uhead_mthd(struct nvkm_object *object, u32 mthd, void *argv, u32 argc)
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{
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struct nvkm_head *head = nvkm_uhead(object);
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switch (mthd) {
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case NVIF_HEAD_V0_SCANOUTPOS: return nvkm_uhead_mthd_scanoutpos(head, argv, argc);
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default:
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return -EINVAL;
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}
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}
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static void *
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nvkm_uhead_dtor(struct nvkm_object *object)
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{
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struct nvkm_head *head = nvkm_uhead(object);
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struct nvkm_disp *disp = head->disp;
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spin_lock(&disp->client.lock);
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head->object.func = NULL;
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spin_unlock(&disp->client.lock);
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return NULL;
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}
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static const struct nvkm_object_func
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nvkm_uhead = {
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.dtor = nvkm_uhead_dtor,
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.mthd = nvkm_uhead_mthd,
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.uevent = nvkm_uhead_uevent,
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};
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int
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nvkm_uhead_new(const struct nvkm_oclass *oclass, void *argv, u32 argc, struct nvkm_object **pobject)
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{
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struct nvkm_disp *disp = nvkm_udisp(oclass->parent);
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struct nvkm_head *head;
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union nvif_head_args *args = argv;
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int ret;
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if (argc != sizeof(args->v0) || args->v0.version != 0)
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return -ENOSYS;
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if (!(head = nvkm_head_find(disp, args->v0.id)))
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return -EINVAL;
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ret = -EBUSY;
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spin_lock(&disp->client.lock);
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if (!head->object.func) {
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nvkm_object_ctor(&nvkm_uhead, oclass, &head->object);
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*pobject = &head->object;
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ret = 0;
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}
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spin_unlock(&disp->client.lock);
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return ret;
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}
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