1 /* 2 * Copyright 2021 Red Hat Inc. 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice shall be included in 12 * all copies or substantial portions of the Software. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 18 * 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 OR 20 * 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 30 static int 31 nvkm_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 45 static int 46 nvkm_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 timestamping 63 * 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 74 static int 75 nvkm_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 86 static void * 87 nvkm_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 98 static const struct nvkm_object_func 99 nvkm_uhead = { 100 .dtor = nvkm_uhead_dtor, 101 .mthd = nvkm_uhead_mthd, 102 .uevent = nvkm_uhead_uevent, 103 }; 104 105 int 106 nvkm_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