Home | History | Annotate | Line # | Download | only in disp 
      1 /*	$NetBSD: nouveau_nvkm_engine_disp_conn.c,v 1.3 2021/12/18 23:45:35 riastradh Exp $	*/
      2 
      3 /*
      4  * Copyright 2014 Red Hat Inc.
      5  *
      6  * Permission is hereby granted, free of charge, to any person obtaining a
      7  * copy of this software and associated documentation files (the "Software"),
      8  * to deal in the Software without restriction, including without limitation
      9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
     10  * and/or sell copies of the Software, and to permit persons to whom the
     11  * Software is furnished to do so, subject to the following conditions:
     12  *
     13  * The above copyright notice and this permission notice shall be included in
     14  * all copies or substantial portions of the Software.
     15  *
     16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     19  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
     20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
     21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
     22  * OTHER DEALINGS IN THE SOFTWARE.
     23  *
     24  * Authors: Ben Skeggs
     25  */
     26 #include <sys/cdefs.h>
     27 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_engine_disp_conn.c,v 1.3 2021/12/18 23:45:35 riastradh Exp $");
     28 
     29 #include "conn.h"
     30 #include "outp.h"
     31 #include "priv.h"
     32 
     33 #include <subdev/gpio.h>
     34 
     35 #include <nvif/event.h>
     36 
     37 static int
     38 nvkm_conn_hpd(struct nvkm_notify *notify)
     39 {
     40 	struct nvkm_conn *conn = container_of(notify, typeof(*conn), hpd);
     41 	struct nvkm_disp *disp = conn->disp;
     42 	struct nvkm_gpio *gpio = disp->engine.subdev.device->gpio;
     43 	const struct nvkm_gpio_ntfy_rep *line = notify->data;
     44 	struct nvif_notify_conn_rep_v0 rep;
     45 	int index = conn->index;
     46 
     47 	CONN_DBG(conn, "HPD: %d", line->mask);
     48 
     49 	if (!nvkm_gpio_get(gpio, 0, DCB_GPIO_UNUSED, conn->hpd.index))
     50 		rep.mask = NVIF_NOTIFY_CONN_V0_UNPLUG;
     51 	else
     52 		rep.mask = NVIF_NOTIFY_CONN_V0_PLUG;
     53 	rep.version = 0;
     54 
     55 	nvkm_event_send(&disp->hpd, rep.mask, index, &rep, sizeof(rep));
     56 	return NVKM_NOTIFY_KEEP;
     57 }
     58 
     59 void
     60 nvkm_conn_fini(struct nvkm_conn *conn)
     61 {
     62 	nvkm_notify_put(&conn->hpd);
     63 }
     64 
     65 void
     66 nvkm_conn_init(struct nvkm_conn *conn)
     67 {
     68 	nvkm_notify_get(&conn->hpd);
     69 }
     70 
     71 void
     72 nvkm_conn_del(struct nvkm_conn **pconn)
     73 {
     74 	struct nvkm_conn *conn = *pconn;
     75 	if (conn) {
     76 		nvkm_notify_fini(&conn->hpd);
     77 		kfree(*pconn);
     78 		*pconn = NULL;
     79 	}
     80 }
     81 
     82 static void
     83 nvkm_conn_ctor(struct nvkm_disp *disp, int index, struct nvbios_connE *info,
     84 	       struct nvkm_conn *conn)
     85 {
     86 	static const u8 hpd[] = { 0x07, 0x08, 0x51, 0x52, 0x5e, 0x5f, 0x60 };
     87 	struct nvkm_gpio *gpio = disp->engine.subdev.device->gpio;
     88 	struct dcb_gpio_func func;
     89 	int ret;
     90 
     91 	conn->disp = disp;
     92 	conn->index = index;
     93 	conn->info = *info;
     94 
     95 	CONN_DBG(conn, "type %02x loc %d hpd %02x dp %x di %x sr %x lcdid %x",
     96 		 info->type, info->location, info->hpd, info->dp,
     97 		 info->di, info->sr, info->lcdid);
     98 
     99 	if ((info->hpd = ffs(info->hpd))) {
    100 		if (--info->hpd >= ARRAY_SIZE(hpd)) {
    101 			CONN_ERR(conn, "hpd %02x unknown", info->hpd);
    102 			return;
    103 		}
    104 		info->hpd = hpd[info->hpd];
    105 
    106 		ret = nvkm_gpio_find(gpio, 0, info->hpd, DCB_GPIO_UNUSED, &func);
    107 		if (ret) {
    108 			CONN_ERR(conn, "func %02x lookup failed, %d",
    109 				 info->hpd, ret);
    110 			return;
    111 		}
    112 
    113 		ret = nvkm_notify_init(NULL, &gpio->event, nvkm_conn_hpd,
    114 				       true, &(struct nvkm_gpio_ntfy_req) {
    115 					.mask = NVKM_GPIO_TOGGLED,
    116 					.line = func.line,
    117 				       },
    118 				       sizeof(struct nvkm_gpio_ntfy_req),
    119 				       sizeof(struct nvkm_gpio_ntfy_rep),
    120 				       &conn->hpd);
    121 		if (ret) {
    122 			CONN_ERR(conn, "func %02x failed, %d", info->hpd, ret);
    123 		} else {
    124 			CONN_DBG(conn, "func %02x (HPD)", info->hpd);
    125 		}
    126 	}
    127 }
    128 
    129 int
    130 nvkm_conn_new(struct nvkm_disp *disp, int index, struct nvbios_connE *info,
    131 	      struct nvkm_conn **pconn)
    132 {
    133 	if (!(*pconn = kzalloc(sizeof(**pconn), GFP_KERNEL)))
    134 		return -ENOMEM;
    135 	nvkm_conn_ctor(disp, index, info, *pconn);
    136 	return 0;
    137 }
    138