[PATCH 13/33] drm/amd/display: Skip querying caps when DMCUB emulation is in use

[Alan Liu]

From: Nicholas Kazlauskas <nicholas.kazlauskas at amd.com>

[Why]
Workaround to avoid accessing DMCUB state too early if the emulator
is in use - we don't support any of the features the caps are querying
with emulation anyway.

[How]
Guard the query if emulation is in use.

Reviewed-by: Charlene Liu <charlene.liu at amd.com>
Acked-by: Alan Liu <haoping.liu at amd.com>
Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas at amd.com>
---
 drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c b/drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c
index c753c6f30dd7..24433409d7de 100644
--- a/drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c
+++ b/drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c
@@ -381,6 +381,9 @@ void dc_dmub_srv_query_caps_cmd(struct dc_dmub_srv *dc_dmub_srv)
 {
 	union dmub_rb_cmd cmd = { 0 };
 
+	if (dc_dmub_srv->ctx->dc->debug.dmcub_emulation)
+		return;
+
 	memset(&cmd, 0, sizeof(cmd));
 
 	/* Prepare fw command */
-- 
2.34.1