Hi!
> [WHY]
> PSP can access DCN registers during command submission and we need
> to ensure that DCN is not in PG before doing so.
>
> [HOW]
> Add a callback to DM to lock and notify DC for idle optimization exit.
> It can't be DC directly because of a potential race condition with the
> link protection thread and the rest of DM operation.
Why is this picked for 5.10-stable?
It adds an callback, but noone is going to use it in 5.10.
Best regards,
Pavel
> +++ b/drivers/gpu/drm/amd/display/modules/inc/mod_hdcp.h
> @@ -143,6 +143,13 @@ struct mod_hdcp_ddc {
> } funcs;
> };
>
> +struct mod_hdcp_dm {
> + void *handle;
> + struct {
> + void (*exit_idle_optimizations)(void *handle);
> + } funcs;
> +};
> +
> struct mod_hdcp_psp {
> void *handle;
> void *funcs;
> @@ -252,6 +259,7 @@ struct mod_hdcp_display_query {
> struct mod_hdcp_config {
> struct mod_hdcp_psp psp;
> struct mod_hdcp_ddc ddc;
> + struct mod_hdcp_dm dm;
> uint8_t index;
> };
>
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