From: Alex Deucher <alexander.deucher@amd.com>
Date: Thu, 16 Aug 2018 15:35:21 -0500
Subject: drm/amdgpu/display: disable eDP fast boot optimization on DCE8
Git-commit: 95f05a3a2e6895ecfd8b4f64b5d6c6cf0b6a3f4a
Patch-mainline: v4.19-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166
Seems to cause blank screens.
Bug: https://bugs.freedesktop.org/show_bug.cgi?id=106940
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
--- a/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c
+++ b/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c
@@ -1588,7 +1588,13 @@ void dce110_enable_accelerated_mode(stru
bool can_eDP_fast_boot_optimize = false;
if (edp_link) {
- can_eDP_fast_boot_optimize =
+ /* this seems to cause blank screens on DCE8 */
+ if ((dc->ctx->dce_version == DCE_VERSION_8_0) ||
+ (dc->ctx->dce_version == DCE_VERSION_8_1) ||
+ (dc->ctx->dce_version == DCE_VERSION_8_3))
+ can_eDP_fast_boot_optimize = false;
+ else
+ can_eDP_fast_boot_optimize =
edp_link->link_enc->funcs->is_dig_enabled(edp_link->link_enc);
}