diff options
| author | Xu, Jinze <JinZe.Xu@amd.com> | 2021-11-04 13:47:35 +0800 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2021-11-22 14:45:01 -0500 |
| commit | 430bb83dbdf3c86768fcf2f6fba2982823261f6d (patch) | |
| tree | f4db3df4ecd34eebd926ea120c25572d6a03d990 /drivers/gpu/drm/amd/display/dc/dcn10 | |
| parent | d26c4ffba6ac16b734749b8624124fdfced41453 (diff) | |
drm/amd/display: Reset fifo after enable otg
[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@amd.com>
Reviewed-by: Anthony Koo <Anthony.Koo@amd.com>
Acked-by: Wayne Lin <wayne.lin@amd.com>
Signed-off-by: JinZe.Xu <JinZe.Xu@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/dcn10')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dcn10/dcn10_stream_encoder.c | 15 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dcn10/dcn10_stream_encoder.h | 3 |
2 files changed, 18 insertions, 0 deletions
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); |