drm/amd/display: Add Interface to set FIFO ERRDET SW Override

[WHY]
HW has handed down a new sequence which requires access to the FIFO
ERRDET SW Override register.

Signed-off-by: Wesley Chalmers <Wesley.Chalmers@amd.com>
Reviewed-by: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com>
Acked-by: Stylon Wang <stylon.wang@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_dccg.c b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_dccg.c
index 8774406120fc..5679983158e2 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_dccg.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_dccg.c
@@ -96,6 +96,15 @@ void dccg2_get_dccg_ref_freq(struct dccg *dccg,
 	return;
 }
 
+void dccg2_set_fifo_errdet_ovr_en(struct dccg *dccg,
+		bool en)
+{
+	struct dcn_dccg *dccg_dcn = TO_DCN_DCCG(dccg);
+
+	REG_UPDATE(DISPCLK_FREQ_CHANGE_CNTL,
+			DCCG_FIFO_ERRDET_OVR_EN, en ? 1 : 0);
+}
+
 void dccg2_init(struct dccg *dccg)
 {
 }
@@ -103,6 +112,7 @@ void dccg2_init(struct dccg *dccg)
 static const struct dccg_funcs dccg2_funcs = {
 	.update_dpp_dto = dccg2_update_dpp_dto,
 	.get_dccg_ref_freq = dccg2_get_dccg_ref_freq,
+	.set_fifo_errdet_ovr_en = dccg2_set_fifo_errdet_ovr_en,
 	.dccg_init = dccg2_init
 };