[PATCHv2 for 6.12 10/10] drm/amd/display: Correct logic check error for fastboot

Rosen Penev
2026-04-01T00:39:49Z

From: Charlene Liu <Charlene.Liu@amd.com>

[ Upstream commit b6a65009e7ce3f0cc72da18f186adb60717b51a0 ]

[Why]
Fix fastboot broken in driver.
This is caused by an open source backport change 7495962c.

from the comment, the intended check is to disable fastboot
for pre-DCN10. but the logic check is reversed, and causes
fastboot to be disabled on all DCN10 and after.

fastboot is for driver trying to pick up bios used hw setting
and bypass reprogramming the hw if dc_validate_boot_timing()
condition meets.

Fixes: 7495962cbceb ("drm/amd/display: Disable fastboot on DCE 6 too")
Cc: stable@vger.kernel.org
Reviewed-by: Mario Limonciello <Mario.Limonciello@amd.com>
Reviewed-by: Ovidiu Bunea <ovidiu.bunea@amd.com>
Signed-off-by: Charlene Liu <Charlene.Liu@amd.com>
Signed-off-by: Ray Wu <ray.wu@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Rosen Penev <rosenp@gmail.com>
---
drivers/gpu/drm/amd/display/dc/hwss/dce110/dce110_hwseq.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/hwss/dce110/dce110_hwseq.c b/drivers/gpu/drm/amd/display/dc/hwss/dce110/dce110_hwseq.c
index 7dc99c85b8ea..551638d9ff61 100644
--- a/drivers/gpu/drm/amd/display/dc/hwss/dce110/dce110_hwseq.c
+++ b/drivers/gpu/drm/amd/display/dc/hwss/dce110/dce110_hwseq.c
@@ -1910,8 +1910,8 @@ void dce110_enable_accelerated_mode(struct dc *dc, struct dc_state *context)

get_edp_streams(context, edp_streams, &edp_stream_num);

- /* Check fastboot support, disable on DCE 6-8 because of blank screens */
- if (edp_num && edp_stream_num && dc->ctx->dce_version < DCE_VERSION_10_0) {
+ /* Check fastboot support, disable on DCE 6-8-10 because of blank screens */
+ if (edp_num && edp_stream_num && dc->ctx->dce_version > DCE_VERSION_10_0) {
for (i = 0; i < edp_num; i++) {
edp_link = edp_links[i];
if (edp_link != edp_streams[0]->link)
--
2.53.0