drm/amd/display: revert "Reset fifo after enable otg"

[Why]
This change causes regression, that prevents some systems
from lighting up internal displays.

[How]
Revert this patch until a new solution is ready.

Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Reviewed-by: Charlene Liu <Charlene.Liu@amd.com>
Acked-by: Stylon Wang <stylon.wang@amd.com>
Signed-off-by: Zhan Liu <Zhan.Liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org

6 files changed, 0 insertions, 31 deletions

diff --git a/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c b/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c
index f3ff141b706a4d..26ec69bb5db944 100644
--- a/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c
+++ b/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c
@@ -1608,11 +1608,6 @@ static enum dc_status apply_single_controller_ctx_to_hw(
 			pipe_ctx->stream_res.stream_enc,
 			pipe_ctx->stream_res.tg->inst);
 
-	if (dc_is_embedded_signal(pipe_ctx->stream->signal) &&
-		pipe_ctx->stream_res.stream_enc->funcs->reset_fifo)
-		pipe_ctx->stream_res.stream_enc->funcs->reset_fifo(
-			pipe_ctx->stream_res.stream_enc);
-
 	if (dc_is_dp_signal(pipe_ctx->stream->signal))
 		dp_source_sequence_trace(link, DPCD_SOURCE_SEQ_AFTER_CONNECT_DIG_FE_OTG);
 
diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_stream_encoder.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_stream_encoder.c
index bf4436d7aaab95..b0c08ee6bc2cb3 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_stream_encoder.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_stream_encoder.c
@@ -902,19 +902,6 @@ void enc1_stream_encoder_stop_dp_info_packets(
 
 }
 
-void enc1_stream_encoder_reset_fifo(
-	struct stream_encoder *enc)
-{
-	struct dcn10_stream_encoder *enc1 = DCN10STRENC_FROM_STRENC(enc);
-
-	/* set DIG_START to 0x1 to reset FIFO */
-	REG_UPDATE(DIG_FE_CNTL, DIG_START, 1);
-	udelay(100);
-
-	/* write 0 to take the FIFO out of reset */
-	REG_UPDATE(DIG_FE_CNTL, DIG_START, 0);
-}
-
 void enc1_stream_encoder_dp_blank(
 	struct dc_link *link,
 	struct stream_encoder *enc)
@@ -1600,8 +1587,6 @@ static const struct stream_encoder_funcs dcn10_str_enc_funcs = {
 		enc1_stream_encoder_send_immediate_sdp_message,
 	.stop_dp_info_packets =
 		enc1_stream_encoder_stop_dp_info_packets,
-	.reset_fifo =
-		enc1_stream_encoder_reset_fifo,
 	.dp_blank =
 		enc1_stream_encoder_dp_blank,
 	.dp_unblank =
diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_stream_encoder.h b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_stream_encoder.h
index a146a41f68e9ef..687d7e4bf7cadd 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_stream_encoder.h
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_stream_encoder.h
@@ -626,9 +626,6 @@ void enc1_stream_encoder_send_immediate_sdp_message(
 void enc1_stream_encoder_stop_dp_info_packets(
 	struct stream_encoder *enc);
 
-void enc1_stream_encoder_reset_fifo(
-	struct stream_encoder *enc);
-
 void enc1_stream_encoder_dp_blank(
 	struct dc_link *link,
 	struct stream_encoder *enc);
diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_stream_encoder.c b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_stream_encoder.c
index 8a70f92795c2aa..aab25ca8343abe 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_stream_encoder.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_stream_encoder.c
@@ -593,8 +593,6 @@ static const struct stream_encoder_funcs dcn20_str_enc_funcs = {
 		enc1_stream_encoder_send_immediate_sdp_message,
 	.stop_dp_info_packets =
 		enc1_stream_encoder_stop_dp_info_packets,
-	.reset_fifo =
-		enc1_stream_encoder_reset_fifo,
 	.dp_blank =
 		enc1_stream_encoder_dp_blank,
 	.dp_unblank =
diff --git a/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_dio_stream_encoder.c b/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_dio_stream_encoder.c
index 8daa12730bc13e..a04ca4a9839257 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_dio_stream_encoder.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_dio_stream_encoder.c
@@ -789,8 +789,6 @@ static const struct stream_encoder_funcs dcn30_str_enc_funcs = {
 		enc3_stream_encoder_update_dp_info_packets,
 	.stop_dp_info_packets =
 		enc1_stream_encoder_stop_dp_info_packets,
-	.reset_fifo =
-		enc1_stream_encoder_reset_fifo,
 	.dp_blank =
 		enc1_stream_encoder_dp_blank,
 	.dp_unblank =
diff --git a/drivers/gpu/drm/amd/display/dc/inc/hw/stream_encoder.h b/drivers/gpu/drm/amd/display/dc/inc/hw/stream_encoder.h
index 073f8b667eff56..c88e113b94d120 100644
--- a/drivers/gpu/drm/amd/display/dc/inc/hw/stream_encoder.h
+++ b/drivers/gpu/drm/amd/display/dc/inc/hw/stream_encoder.h
@@ -164,10 +164,6 @@ struct stream_encoder_funcs {
 	void (*stop_dp_info_packets)(
 		struct stream_encoder *enc);
 
-	void (*reset_fifo)(
-		struct stream_encoder *enc
-	);
-
 	void (*dp_blank)(
 		struct dc_link *link,
 		struct stream_encoder *enc);