From: "Xu, Jinze" <JinZe.Xu@xxxxxxx>
[Why]
In fast boot sequence, when change dispclk, otg is disabled but digfe
is enabled. This may cause dig fifo error.
[How]
Reset dig fifo after enable otg.
Reviewed-by: Jun Lei <Jun.Lei@xxxxxxx>
Reviewed-by: Anthony Koo <Anthony.Koo@xxxxxxx>
Acked-by: Wayne Lin <wayne.lin@xxxxxxx>
Signed-off-by: JinZe.Xu <JinZe.Xu@xxxxxxx>
---
.../amd/display/dc/dce110/dce110_hw_sequencer.c | 5 +++++
.../amd/display/dc/dcn10/dcn10_stream_encoder.c | 15 +++++++++++++++
.../amd/display/dc/dcn10/dcn10_stream_encoder.h | 3 +++
.../amd/display/dc/dcn20/dcn20_stream_encoder.c | 2 ++
.../display/dc/dcn30/dcn30_dio_stream_encoder.c | 2 ++
.../drm/amd/display/dc/inc/hw/stream_encoder.h | 4 ++++
6 files changed, 31 insertions(+)
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 e7e2aa46218d..665cf58b0724 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
@@ -1602,6 +1602,11 @@ 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_dp_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 b0c08ee6bc2c..bf4436d7aaab 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
@@ -902,6 +902,19 @@ 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)
@@ -1587,6 +1600,8 @@ 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 687d7e4bf7ca..a146a41f68e9 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
@@ -626,6 +626,9 @@ 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 aab25ca8343a..8a70f92795c2 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
@@ -593,6 +593,8 @@ 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 ebd9c35c914f..7aa9aaf5db4c 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
@@ -805,6 +805,8 @@ 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 c88e113b94d1..073f8b667eff 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
@@ -164,6 +164,10 @@ 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);
--
2.25.1
