From ecdd25f858fe0f589c56e94908e361b4be70bc43 Mon Sep 17 00:00:00 2001 From: Charlene Liu Date: Thu, 18 Jan 2018 19:09:06 -0500 Subject: [PATCH 3508/4131] drm/amd/display: add eDP 1.2+ polling for T7 Signed-off-by: Charlene Liu Reviewed-by: Charlene Liu Acked-by: Harry Wentland Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c | 22 ++++++++++++++++++++++ .../drm/amd/display/dc/dce/dce_stream_encoder.c | 6 +++++- .../amd/display/dc/dce110/dce110_hw_sequencer.c | 9 +++++---- drivers/gpu/drm/amd/display/dc/inc/link_hwss.h | 1 + 4 files changed, 33 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c index 524f4aa..bae9b05 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c @@ -123,6 +123,28 @@ bool edp_receiver_ready_T9(struct dc_link *link) } while (++tries < 50); return result; } +bool edp_receiver_ready_T7(struct dc_link *link) +{ + unsigned int tries = 0; + unsigned char sinkstatus = 0; + unsigned char edpRev = 0; + enum dc_status result = DC_OK; + + result = core_link_read_dpcd(link, DP_EDP_DPCD_REV, &edpRev, sizeof(edpRev)); + if (result == DC_OK && edpRev < DP_EDP_12) + return true; + /* start from eDP version 1.2, SINK_STAUS indicate the sink is ready.*/ + do { + sinkstatus = 0; + result = core_link_read_dpcd(link, DP_SINK_STATUS, &sinkstatus, sizeof(sinkstatus)); + if (sinkstatus == 1) + break; + if (result != DC_OK) + break; + udelay(25); //MAx T7 is 50ms + } while (++tries < 300); + return result; +} void dp_disable_link_phy(struct dc_link *link, enum signal_type signal) { diff --git a/drivers/gpu/drm/amd/display/dc/dce/dce_stream_encoder.c b/drivers/gpu/drm/amd/display/dc/dce/dce_stream_encoder.c index 83bae20..8146b90 100644 --- a/drivers/gpu/drm/amd/display/dc/dce/dce_stream_encoder.c +++ b/drivers/gpu/drm/amd/display/dc/dce/dce_stream_encoder.c @@ -920,6 +920,7 @@ static void dce110_stream_encoder_dp_blank( { struct dce110_stream_encoder *enc110 = DCE110STRENC_FROM_STRENC(enc); uint32_t retries = 0; + uint32_t reg1 = 0; uint32_t max_retries = DP_BLANK_MAX_RETRY * 10; /* Note: For CZ, we are changing driver default to disable @@ -928,7 +929,10 @@ static void dce110_stream_encoder_dp_blank( * handful of panels that cannot handle disable stream at * HBLANK and will result in a white line flash across the * screen on stream disable. */ - + REG_GET(DP_VID_STREAM_CNTL, DP_VID_STREAM_ENABLE, ®1); + if ((reg1 & 0x1) == 0) + /*stream not enabled*/ + return; /* Specify the video stream disable point * (2 = start of the next vertical blank) */ REG_UPDATE(DP_VID_STREAM_CNTL, DP_VID_STREAM_DIS_DEFER, 2); 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 364b88a..bc1c454 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 @@ -927,9 +927,13 @@ void hwss_edp_backlight_control( * Enable it in the future if necessary. */ /* dc_service_sleep_in_milliseconds(50); */ + /*edp 1.2*/ + if (cntl.action == TRANSMITTER_CONTROL_BACKLIGHT_ON) + edp_receiver_ready_T7(link); link_transmitter_control(ctx->dc_bios, &cntl); /*edp 1.2*/ - edp_receiver_ready_T9(link); + if (cntl.action == TRANSMITTER_CONTROL_BACKLIGHT_OFF) + edp_receiver_ready_T9(link); } void dce110_disable_stream(struct pipe_ctx *pipe_ctx, int option) @@ -976,9 +980,6 @@ void dce110_disable_stream(struct pipe_ctx *pipe_ctx, int option) */ } - /* blank at encoder level */ - if (dc_is_dp_signal(pipe_ctx->stream->signal)) - pipe_ctx->stream_res.stream_enc->funcs->dp_blank(pipe_ctx->stream_res.stream_enc); link->link_enc->funcs->connect_dig_be_to_fe( link->link_enc, diff --git a/drivers/gpu/drm/amd/display/dc/inc/link_hwss.h b/drivers/gpu/drm/amd/display/dc/inc/link_hwss.h index 46bb201..30be7bb 100644 --- a/drivers/gpu/drm/amd/display/dc/inc/link_hwss.h +++ b/drivers/gpu/drm/amd/display/dc/inc/link_hwss.h @@ -52,6 +52,7 @@ void dp_enable_link_phy( void dp_receiver_power_ctrl(struct dc_link *link, bool on); bool edp_receiver_ready_T9(struct dc_link *link); +bool edp_receiver_ready_T7(struct dc_link *link); void dp_disable_link_phy(struct dc_link *link, enum signal_type signal); -- 2.7.4