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drm/amd/display: Notify DMUB on HW Release

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[Why & How]
DMUB shall be notified on driver hardware
release. Implement notification.

Reviewed-by: Duncan Ma <duncan.ma@amd.com>
Signed-off-by: Duncan Ma <Duncan.Ma@amd.com>
Signed-off-by: Ivan Lipski <ivan.lipski@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Duncan Ma 2025-05-02 12:40:48 -04:00 committed by Alex Deucher
parent f9dbe8eb1b
commit a8a21bafa1
2 changed files with 23 additions and 0 deletions
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17
drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c
View File

@ -2176,3 +2176,20 @@ bool dmub_lsdma_send_poll_reg_write_command(struct dc_dmub_srv *dc_dmub_srv, uin
return result;
}
void dc_dmub_srv_release_hw(const struct dc *dc)
{
struct dc_dmub_srv *dc_dmub_srv = dc->ctx->dmub_srv;
union dmub_rb_cmd cmd = {0};
if (!dc_dmub_srv || !dc_dmub_srv->dmub)
return;
memset(&cmd, 0, sizeof(cmd));
cmd.idle_opt_notify_idle.header.type = DMUB_CMD__IDLE_OPT;
cmd.idle_opt_notify_idle.header.sub_type = DMUB_CMD__IDLE_OPT_RELEASE_HW;
cmd.idle_opt_notify_idle.header.payload_bytes =
sizeof(cmd.idle_opt_notify_idle) -
sizeof(cmd.idle_opt_notify_idle.header);
dm_execute_dmub_cmd(dc->ctx, &cmd, DM_DMUB_WAIT_TYPE_WAIT);
}

6
drivers/gpu/drm/amd/display/dc/dc_dmub_srv.h
View File

@ -291,4 +291,10 @@ bool dc_dmub_srv_ips_query_residency_info(const struct dc_context *ctx, uint8_t
struct dmub_ips_residency_info *driver_info,
enum ips_residency_mode ips_mode);
/**
* dc_dmub_srv_release_hw() - Notifies DMUB service that HW access is no longer required.
*
* @dc - pointer to DC object
*/
void dc_dmub_srv_release_hw(const struct dc *dc);
#endif /* _DMUB_DC_SRV_H_ */