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1/*2 * Copyright 2021 Red Hat Inc.3 *4 * Permission is hereby granted, free of charge, to any person obtaining a5 * copy of this software and associated documentation files (the "Software"),6 * to deal in the Software without restriction, including without limitation7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,8 * and/or sell copies of the Software, and to permit persons to whom the9 * Software is furnished to do so, subject to the following conditions:10 *11 * The above copyright notice and this permission notice shall be included in12 * all copies or substantial portions of the Software.13 *14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR20 * OTHER DEALINGS IN THE SOFTWARE.21 */22#define nvkm_uhead(p) container_of((p), struct nvkm_head, object)23#include "head.h"24#include <core/event.h>25 26#include <nvif/if0013.h>27 28#include <nvif/event.h>29 30static int31nvkm_uhead_uevent(struct nvkm_object *object, void *argv, u32 argc, struct nvkm_uevent *uevent)32{33 struct nvkm_head *head = nvkm_uhead(object);34 union nvif_head_event_args *args = argv;35 36 if (!uevent)37 return 0;38 if (argc != sizeof(args->vn))39 return -ENOSYS;40 41 return nvkm_uevent_add(uevent, &head->disp->vblank, head->id,42 NVKM_DISP_HEAD_EVENT_VBLANK, NULL);43}44 45static int46nvkm_uhead_mthd_scanoutpos(struct nvkm_head *head, void *argv, u32 argc)47{48 union nvif_head_scanoutpos_args *args = argv;49 50 if (argc != sizeof(args->v0) || args->v0.version != 0)51 return -ENOSYS;52 53 head->func->state(head, &head->arm);54 args->v0.vtotal = head->arm.vtotal;55 args->v0.vblanks = head->arm.vblanks;56 args->v0.vblanke = head->arm.vblanke;57 args->v0.htotal = head->arm.htotal;58 args->v0.hblanks = head->arm.hblanks;59 args->v0.hblanke = head->arm.hblanke;60 61 /* We don't support reading htotal/vtotal on pre-NV50 VGA,62 * so we have to give up and trigger the timestamping63 * fallback in the drm core.64 */65 if (!args->v0.vtotal || !args->v0.htotal)66 return -ENOTSUPP;67 68 args->v0.time[0] = ktime_to_ns(ktime_get());69 head->func->rgpos(head, &args->v0.hline, &args->v0.vline);70 args->v0.time[1] = ktime_to_ns(ktime_get());71 return 0;72}73 74static int75nvkm_uhead_mthd(struct nvkm_object *object, u32 mthd, void *argv, u32 argc)76{77 struct nvkm_head *head = nvkm_uhead(object);78 79 switch (mthd) {80 case NVIF_HEAD_V0_SCANOUTPOS: return nvkm_uhead_mthd_scanoutpos(head, argv, argc);81 default:82 return -EINVAL;83 }84}85 86static void *87nvkm_uhead_dtor(struct nvkm_object *object)88{89 struct nvkm_head *head = nvkm_uhead(object);90 struct nvkm_disp *disp = head->disp;91 92 spin_lock(&disp->client.lock);93 head->object.func = NULL;94 spin_unlock(&disp->client.lock);95 return NULL;96}97 98static const struct nvkm_object_func99nvkm_uhead = {100 .dtor = nvkm_uhead_dtor,101 .mthd = nvkm_uhead_mthd,102 .uevent = nvkm_uhead_uevent,103};104 105int106nvkm_uhead_new(const struct nvkm_oclass *oclass, void *argv, u32 argc, struct nvkm_object **pobject)107{108 struct nvkm_disp *disp = nvkm_udisp(oclass->parent);109 struct nvkm_head *head;110 union nvif_head_args *args = argv;111 int ret;112 113 if (argc != sizeof(args->v0) || args->v0.version != 0)114 return -ENOSYS;115 if (!(head = nvkm_head_find(disp, args->v0.id)))116 return -EINVAL;117 118 ret = -EBUSY;119 spin_lock(&disp->client.lock);120 if (!head->object.func) {121 nvkm_object_ctor(&nvkm_uhead, oclass, &head->object);122 *pobject = &head->object;123 ret = 0;124 }125 spin_unlock(&disp->client.lock);126 return ret;127}128