From: Charlene Liu <charlene.liu@xxxxxxx>
Signed-off-by: Charlene Liu <charlene.liu at amd.com>
Reviewed-by: Anthony Koo <Anthony.Koo at amd.com>
Acked-by: Harry Wentland <Harry.Wentland at amd.com>
---
drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c | 23 ++++++++++++++++++++++
.../gpu/drm/amd/display/dc/dce/dce_link_encoder.c | 2 +-
2 files changed, 24 insertions(+), 1 deletion(-)
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 da880bd02ad7..e12f1f9fb590 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
@@ -110,6 +110,28 @@ void dp_enable_link_phy(
dp_receiver_power_ctrl(link, true);
}
+bool edp_receiver_ready_T9(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 (edpRev < DP_EDP_12)
+ return true;
+ /* start from eDP version 1.2, SINK_STAUS indicate the sink is ready.*/
+ do {
+ sinkstatus = 1;
+ result = core_link_read_dpcd(link, DP_SINK_STATUS, &sinkstatus, sizeof(sinkstatus));
+ if (sinkstatus == 0)
+ break;
+ if (result != DC_OK)
+ break;
+ dm_delay_in_microseconds(link->ctx, 100); //MAx T9
+ } while (++tries < 50);
+ return result;
+}
+
void dp_disable_link_phy(struct dc_link *link, enum signal_type signal)
{
if (!link->wa_flags.dp_keep_receiver_powered)
@@ -117,6 +139,7 @@ void dp_disable_link_phy(struct dc_link *link, enum signal_type signal)
if (signal == SIGNAL_TYPE_EDP) {
link->link_enc->funcs->backlight_control(link->link_enc, false);
+ edp_receiver_ready_T9(link);
link->link_enc->funcs->disable_output(link->link_enc, signal);
link->link_enc->funcs->power_control(link->link_enc, false);
} else
diff --git a/drivers/gpu/drm/amd/display/dc/dce/dce_link_encoder.c b/drivers/gpu/drm/amd/display/dc/dce/dce_link_encoder.c
index 0dab5bacde3c..559a9f81c9c9 100644
--- a/drivers/gpu/drm/amd/display/dc/dce/dce_link_encoder.c
+++ b/drivers/gpu/drm/amd/display/dc/dce/dce_link_encoder.c
@@ -744,7 +744,7 @@ void dce110_link_encoder_edp_backlight_control(
return;
}
- if (!enable && !is_panel_powered_on(enc110)) {
+ if (!enable && !is_panel_backlight_on(enc110)) {
dm_logger_write(ctx->logger, LOG_HW_RESUME_S3,
"%s: panel already powered down. Do nothing.\n",
__func__);
--
2.11.0
