1 /* 2 * Copyright 2017 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 * Authors: Ben Skeggs <bskeggs@redhat.com> 23 */ 24 #include "head.h" 25 26 #include <core/client.h> 27 28 #include <nvif/cl0046.h> 29 #include <nvif/unpack.h> 30 31 struct nvkm_head * 32 nvkm_head_find(struct nvkm_disp *disp, int id) 33 { 34 struct nvkm_head *head; 35 list_for_each_entry(head, &disp->head, head) { 36 if (head->id == id) 37 return head; 38 } 39 return NULL; 40 } 41 42 int 43 nvkm_head_mthd_scanoutpos(struct nvkm_object *object, 44 struct nvkm_head *head, void *data, u32 size) 45 { 46 union { 47 struct nv04_disp_scanoutpos_v0 v0; 48 } *args = data; 49 int ret = -ENOSYS; 50 51 nvif_ioctl(object, "head scanoutpos size %d\n", size); 52 if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, false))) { 53 nvif_ioctl(object, "head scanoutpos vers %d\n", 54 args->v0.version); 55 56 head->func->state(head, &head->arm); 57 args->v0.vtotal = head->arm.vtotal; 58 args->v0.vblanks = head->arm.vblanks; 59 args->v0.vblanke = head->arm.vblanke; 60 args->v0.htotal = head->arm.htotal; 61 args->v0.hblanks = head->arm.hblanks; 62 args->v0.hblanke = head->arm.hblanke; 63 64 /* We don't support reading htotal/vtotal on pre-NV50 VGA, 65 * so we have to give up and trigger the timestamping 66 * fallback in the drm core. 67 */ 68 if (!args->v0.vtotal || !args->v0.htotal) 69 return -ENOTSUPP; 70 71 args->v0.time[0] = ktime_to_ns(ktime_get()); 72 head->func->rgpos(head, &args->v0.hline, &args->v0.vline); 73 args->v0.time[1] = ktime_to_ns(ktime_get()); 74 } else 75 return ret; 76 77 return 0; 78 } 79 80 void 81 nvkm_head_del(struct nvkm_head **phead) 82 { 83 struct nvkm_head *head = *phead; 84 if (head) { 85 HEAD_DBG(head, "dtor"); 86 list_del(&head->head); 87 kfree(*phead); 88 *phead = NULL; 89 } 90 } 91 92 int 93 nvkm_head_new_(const struct nvkm_head_func *func, 94 struct nvkm_disp *disp, int id) 95 { 96 struct nvkm_head *head; 97 if (!(head = kzalloc(sizeof(*head), GFP_KERNEL))) 98 return -ENOMEM; 99 head->func = func; 100 head->disp = disp; 101 head->id = id; 102 list_add_tail(&head->head, &disp->head); 103 HEAD_DBG(head, "ctor"); 104 return 0; 105 } 106