From: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Date: Thu, 22 Jun 2023 20:14:22 +0000 (-0400)
Subject: drm/amd/display: Skip querying caps when DMCUB emulation is in use
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=a243e38e699f03b7d73b156564cfd67b78448368;p=linux.git

drm/amd/display: Skip querying caps when DMCUB emulation is in use

[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@amd.com>
Acked-by: Alan Liu <haoping.liu@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>
---

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 c753c6f30dd71..24433409d7def 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 */