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drm/amd/display: Exit idle optimizations before HDCP execution

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[ Upstream commit f30a3bea92bdab398531129d187629fb1d28f598 ]

[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.

Cc: Mario Limonciello <mario.limonciello@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Charlene Liu <charlene.liu@amd.com>
Acked-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Nicholas Kazlauskas 2024-02-12 16:51:59 -05:00 committed by Greg Kroah-Hartman
parent 52d4cfa56b
commit b4291f58a9
2 changed files with 18 additions and 0 deletions
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10
drivers/gpu/drm/amd/display/modules/hdcp/hdcp.c
View File

@ -86,6 +86,14 @@ static uint8_t is_cp_desired_hdcp2(struct mod_hdcp *hdcp)
!hdcp->connection.is_hdcp2_revoked;
}
static void exit_idle_optimizations(struct mod_hdcp *hdcp)
{
struct mod_hdcp_dm *dm = &hdcp->config.dm;
if (dm->funcs.exit_idle_optimizations)
dm->funcs.exit_idle_optimizations(dm->handle);
}
static enum mod_hdcp_status execution(struct mod_hdcp *hdcp,
struct mod_hdcp_event_context *event_ctx,
union mod_hdcp_transition_input *input)
@ -448,6 +456,8 @@ enum mod_hdcp_status mod_hdcp_process_event(struct mod_hdcp *hdcp,
memset(&event_ctx, 0, sizeof(struct mod_hdcp_event_context));
event_ctx.event = event;
exit_idle_optimizations(hdcp);
/* execute and transition */
exec_status = execution(hdcp, &event_ctx, &hdcp->auth.trans_input);
trans_status = transition(

8
drivers/gpu/drm/amd/display/modules/inc/mod_hdcp.h
View File

@ -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;
};