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drm/amd/display: eDP power sequence T9 fail

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Signed-off-by: Charlene Liu <charlene.liu@amd.com>
Reviewed-by: Anthony Koo <Anthony.Koo@amd.com>
Acked-by: Harry Wentland <Harry.Wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Charlene Liu 2017-08-11 13:22:02 -04:00 committed by Alex Deucher
parent 4e772ae5f9
commit 71afd9d14f
2 changed files with 24 additions and 1 deletions
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23
drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c
View File

@ -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

2
drivers/gpu/drm/amd/display/dc/dce/dce_link_encoder.c
View File

@ -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__);