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Diffstat (limited to 'meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/0971-drm-amd-display-eDP-power-sequence-T9-fail.patch')
-rw-r--r--meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/0971-drm-amd-display-eDP-power-sequence-T9-fail.patch70
1 files changed, 70 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/0971-drm-amd-display-eDP-power-sequence-T9-fail.patch b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/0971-drm-amd-display-eDP-power-sequence-T9-fail.patch
new file mode 100644
index 00000000..74f75647
--- /dev/null
+++ b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/0971-drm-amd-display-eDP-power-sequence-T9-fail.patch
@@ -0,0 +1,70 @@
+From d5fb159b7fa859ba207aa6efc4004f6f26c301cf Mon Sep 17 00:00:00 2001
+From: Charlene Liu <charlene.liu@amd.com>
+Date: Fri, 11 Aug 2017 13:22:02 -0400
+Subject: [PATCH 0971/4131] drm/amd/display: eDP power sequence T9 fail
+
+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>
+---
+ 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 da880bd..e12f1f9 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 0dab5ba..559a9f8 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__);
+--
+2.7.4
+