From: Hugo Hu hugo.hu@amd.com

[ Upstream commit 3a372bed1e337efa450d8288bc75cfc9237b7bad ]

[Why] The current end of T9 delay is relay on polling sink status by DPCD. But the polling for sink status change after NoVideoStream_flag set to 0.

[How] Add function edp_add_delay_for_T9 to add T9 delay. Move the sink status polling after blank.

Signed-off-by: Hugo Hu hugo.hu@amd.com Reviewed-by: Charlene Liu Charlene.Liu@amd.com Acked-by: Qingqing Zhuo qingqing.zhuo@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com Signed-off-by: Sasha Levin sashal@kernel.org --- .../gpu/drm/amd/display/dc/core/dc_link_hwss.c | 13 ++++++++----- .../amd/display/dc/dce110/dce110_hw_sequencer.c | 16 ++++++++-------- drivers/gpu/drm/amd/display/dc/inc/link_hwss.h | 1 + 3 files changed, 17 insertions(+), 13 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 11a619befb425..124ce215fca53 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 @@ -156,6 +156,13 @@ void dp_enable_link_phy( dp_receiver_power_ctrl(link, true); }

+void edp_add_delay_for_T9(struct dc_link *link) +{ + if (link->local_sink && + link->local_sink->edid_caps.panel_patch.extra_delay_backlight_off > 0) + udelay(link->local_sink->edid_caps.panel_patch.extra_delay_backlight_off * 1000); +} + bool edp_receiver_ready_T9(struct dc_link *link) { unsigned int tries = 0; @@ -165,7 +172,7 @@ bool edp_receiver_ready_T9(struct dc_link *link)

result = core_link_read_dpcd(link, DP_EDP_DPCD_REV, &edpRev, sizeof(edpRev));

- /* start from eDP version 1.2, SINK_STAUS indicate the sink is ready.*/ + /* start from eDP version 1.2, SINK_STAUS indicate the sink is ready.*/ if (result == DC_OK && edpRev >= DP_EDP_12) { do { sinkstatus = 1; @@ -178,10 +185,6 @@ bool edp_receiver_ready_T9(struct dc_link *link) } while (++tries < 50); }

- if (link->local_sink && - link->local_sink->edid_caps.panel_patch.extra_delay_backlight_off > 0) - udelay(link->local_sink->edid_caps.panel_patch.extra_delay_backlight_off * 1000); - return result; } bool edp_receiver_ready_T7(struct dc_link *link) 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 3ac6c7b65a45a..9f56887029ca6 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 @@ -992,8 +992,6 @@ void dce110_edp_backlight_control(

link_transmitter_control(ctx->dc_bios, &cntl);

- - if (enable && link->dpcd_sink_ext_caps.bits.oled) msleep(OLED_POST_T7_DELAY);

@@ -1004,7 +1002,7 @@ void dce110_edp_backlight_control(

/*edp 1.2*/ if (cntl.action == TRANSMITTER_CONTROL_BACKLIGHT_OFF) - edp_receiver_ready_T9(link); + edp_add_delay_for_T9(link);

if (!enable && link->dpcd_sink_ext_caps.bits.oled) msleep(OLED_PRE_T11_DELAY); @@ -1145,12 +1143,14 @@ void dce110_blank_stream(struct pipe_ctx *pipe_ctx) if (dc_is_dp_signal(pipe_ctx->stream->signal)) { pipe_ctx->stream_res.stream_enc->funcs->dp_blank(pipe_ctx->stream_res.stream_enc);

- /* - * After output is idle pattern some sinks need time to recognize the stream - * has changed or they enter protection state and hang. - */ - if (!dc_is_embedded_signal(pipe_ctx->stream->signal)) + if (!dc_is_embedded_signal(pipe_ctx->stream->signal)) { + /* + * After output is idle pattern some sinks need time to recognize the stream + * has changed or they enter protection state and hang. + */ msleep(60); + } else if (pipe_ctx->stream->signal == SIGNAL_TYPE_EDP) + edp_receiver_ready_T9(link); }

} 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 9af7ee5bc8ee1..33590a728fc53 100644 --- a/drivers/gpu/drm/amd/display/dc/inc/link_hwss.h +++ b/drivers/gpu/drm/amd/display/dc/inc/link_hwss.h @@ -51,6 +51,7 @@ void dp_enable_link_phy( const struct dc_link_settings *link_settings);

void dp_receiver_power_ctrl(struct dc_link *link, bool on); +void edp_add_delay_for_T9(struct dc_link *link); bool edp_receiver_ready_T9(struct dc_link *link); bool edp_receiver_ready_T7(struct dc_link *link);