drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c

   1 /*
   2  * Copyright 2019 Advanced Micro Devices, 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: AMD
  23  *
  24  */
  25
  26 #include "dc.h"
  27 #include "dc_dmub_srv.h"
  28 #include "../dmub/dmub_srv.h"
  29
  30 static void dc_dmub_srv_construct(struct dc_dmub_srv *dc_srv, struct dc *dc,
  31                                   struct dmub_srv *dmub)
  32 {
  33         dc_srv->dmub = dmub;
  34         dc_srv->ctx = dc->ctx;
  35 }
  36
  37 struct dc_dmub_srv *dc_dmub_srv_create(struct dc *dc, struct dmub_srv *dmub)
  38 {
  39         struct dc_dmub_srv *dc_srv =
  40                 kzalloc(sizeof(struct dc_dmub_srv), GFP_KERNEL);
  41
  42         if (dc_srv == NULL) {
  43                 BREAK_TO_DEBUGGER();
  44                 return NULL;
  45         }
  46
  47         dc_dmub_srv_construct(dc_srv, dc, dmub);
  48
  49         return dc_srv;
  50 }
  51
  52 void dc_dmub_srv_destroy(struct dc_dmub_srv **dmub_srv)
  53 {
  54         if (*dmub_srv) {
  55                 kfree(*dmub_srv);
  56                 *dmub_srv = NULL;
  57         }
  58 }
  59
  60 void dc_dmub_srv_cmd_queue(struct dc_dmub_srv *dc_dmub_srv,
  61                            union dmub_rb_cmd *cmd)
  62 {
  63         struct dmub_srv *dmub = dc_dmub_srv->dmub;
  64         struct dc_context *dc_ctx = dc_dmub_srv->ctx;
  65         enum dmub_status status;
  66
  67         status = dmub_srv_cmd_queue(dmub, cmd);
  68         if (status == DMUB_STATUS_OK)
  69                 return;
  70
  71         if (status != DMUB_STATUS_QUEUE_FULL)
  72                 goto error;
  73
  74         /* Execute and wait for queue to become empty again. */
  75         dc_dmub_srv_cmd_execute(dc_dmub_srv);
  76         dc_dmub_srv_wait_idle(dc_dmub_srv);
  77
  78         /* Requeue the command. */
  79         status = dmub_srv_cmd_queue(dmub, cmd);
  80         if (status == DMUB_STATUS_OK)
  81                 return;
  82
  83 error:
  84         DC_ERROR("Error queuing DMUB command: status=%d\n", status);
  85 }
  86
  87 void dc_dmub_srv_cmd_execute(struct dc_dmub_srv *dc_dmub_srv)
  88 {
  89         struct dmub_srv *dmub = dc_dmub_srv->dmub;
  90         struct dc_context *dc_ctx = dc_dmub_srv->ctx;
  91         enum dmub_status status;
  92
  93         status = dmub_srv_cmd_execute(dmub);
  94         if (status != DMUB_STATUS_OK)
  95                 DC_ERROR("Error starting DMUB execution: status=%d\n", status);
  96 }
  97
  98 void dc_dmub_srv_wait_idle(struct dc_dmub_srv *dc_dmub_srv)
  99 {
 100         struct dmub_srv *dmub = dc_dmub_srv->dmub;
 101         struct dc_context *dc_ctx = dc_dmub_srv->ctx;
 102         enum dmub_status status;
 103
 104         status = dmub_srv_wait_for_idle(dmub, 100000);
 105         if (status != DMUB_STATUS_OK)
 106                 DC_ERROR("Error waiting for DMUB idle: status=%d\n", status);
 107 }
 108
 109 void dc_dmub_srv_wait_phy_init(struct dc_dmub_srv *dc_dmub_srv)
 110 {
 111         struct dmub_srv *dmub = dc_dmub_srv->dmub;
 112         struct dc_context *dc_ctx = dc_dmub_srv->ctx;
 113         enum dmub_status status;
 114
 115         for (;;) {
 116                 /* Wait up to a second for PHY init. */
 117                 status = dmub_srv_wait_for_phy_init(dmub, 1000000);
 118                 if (status == DMUB_STATUS_OK)
 119                         /* Initialization OK */
 120                         break;
 121
 122                 DC_ERROR("DMCUB PHY init failed: status=%d\n", status);
 123                 ASSERT(0);
 124
 125                 if (status != DMUB_STATUS_TIMEOUT)
 126                         /*
 127                          * Server likely initialized or we don't have
 128                          * DMCUB HW support - this won't end.
 129                          */
 130                         break;
 131
 132                 /* Continue spinning so we don't hang the ASIC. */
 133         }
 134 }
 135
 136 bool dc_dmub_srv_notify_stream_mask(struct dc_dmub_srv *dc_dmub_srv,
 137                                     unsigned int stream_mask)
 138 {
 139         struct dmub_srv *dmub;
 140         const uint32_t timeout = 30;
 141
 142         if (!dc_dmub_srv || !dc_dmub_srv->dmub)
 143                 return false;
 144
 145         dmub = dc_dmub_srv->dmub;
 146
 147         return dmub_srv_send_gpint_command(
 148                        dmub, DMUB_GPINT__IDLE_OPT_NOTIFY_STREAM_MASK,
 149                        stream_mask, timeout) == DMUB_STATUS_OK;
 150 }