diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c b/drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c new file mode 100644 index 000000000000..59c298a6484f --- /dev/null +++ b/drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c @@ -0,0 +1,134 @@ +/* + * Copyright 2019 Advanced Micro Devices, Inc. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + * + * Authors: AMD + * + */ + +#include "dc.h" +#include "dc_dmub_srv.h" +#include "../dmub/inc/dmub_srv.h" + +static void dc_dmub_srv_construct(struct dc_dmub_srv *dc_srv, struct dc *dc, + struct dmub_srv *dmub) +{ + dc_srv->dmub = dmub; + dc_srv->ctx = dc->ctx; +} + +struct dc_dmub_srv *dc_dmub_srv_create(struct dc *dc, struct dmub_srv *dmub) +{ + struct dc_dmub_srv *dc_srv = + kzalloc(sizeof(struct dc_dmub_srv), GFP_KERNEL); + + if (dc_srv == NULL) { + BREAK_TO_DEBUGGER(); + return NULL; + } + + dc_dmub_srv_construct(dc_srv, dc, dmub); + + return dc_srv; +} + +void dc_dmub_srv_destroy(struct dc_dmub_srv **dmub_srv) +{ + if (*dmub_srv) { + kfree(*dmub_srv); + *dmub_srv = NULL; + } +} + +void dc_dmub_srv_cmd_queue(struct dc_dmub_srv *dc_dmub_srv, + struct dmub_cmd_header *cmd) +{ + struct dmub_srv *dmub = dc_dmub_srv->dmub; + struct dc_context *dc_ctx = dc_dmub_srv->ctx; + enum dmub_status status; + + status = dmub_srv_cmd_queue(dmub, cmd); + if (status == DMUB_STATUS_OK) + return; + + if (status != DMUB_STATUS_QUEUE_FULL) + goto error; + + /* Execute and wait for queue to become empty again. */ + dc_dmub_srv_cmd_execute(dc_dmub_srv); + dc_dmub_srv_wait_idle(dc_dmub_srv); + + /* Requeue the command. */ + status = dmub_srv_cmd_queue(dmub, cmd); + if (status == DMUB_STATUS_OK) + return; + +error: + DC_ERROR("Error queuing DMUB command: status=%d\n", status); +} + +void dc_dmub_srv_cmd_execute(struct dc_dmub_srv *dc_dmub_srv) +{ + struct dmub_srv *dmub = dc_dmub_srv->dmub; + struct dc_context *dc_ctx = dc_dmub_srv->ctx; + enum dmub_status status; + + status = dmub_srv_cmd_execute(dmub); + if (status != DMUB_STATUS_OK) + DC_ERROR("Error starting DMUB execution: status=%d\n", status); +} + +void dc_dmub_srv_wait_idle(struct dc_dmub_srv *dc_dmub_srv) +{ + struct dmub_srv *dmub = dc_dmub_srv->dmub; + struct dc_context *dc_ctx = dc_dmub_srv->ctx; + enum dmub_status status; + + status = dmub_srv_wait_for_idle(dmub, 100000); + if (status != DMUB_STATUS_OK) + DC_ERROR("Error waiting for DMUB idle: status=%d\n", status); +} + +void dc_dmub_srv_wait_phy_init(struct dc_dmub_srv *dc_dmub_srv) +{ + struct dmub_srv *dmub = dc_dmub_srv->dmub; + struct dc_context *dc_ctx = dc_dmub_srv->ctx; + enum dmub_status status; + + for (;;) { + /* Wait up to a second for PHY init. */ + status = dmub_srv_wait_for_phy_init(dmub, 1000000); + if (status == DMUB_STATUS_OK) + /* Initialization OK */ + break; + + DC_ERROR("DMCUB PHY init failed: status=%d\n", status); + ASSERT(0); + + if (status != DMUB_STATUS_TIMEOUT) + /* + * Server likely initialized or we don't have + * DMCUB HW support - this won't end. + */ + break; + + /* Continue spinning so we don't hang the ASIC. */ + } +} |