diff options
Diffstat (limited to 'common/recipes-kernel/linux/linux-yocto-4.14.71/0971-drm-amd-display-eDP-power-sequence-T9-fail.patch')
-rw-r--r-- | common/recipes-kernel/linux/linux-yocto-4.14.71/0971-drm-amd-display-eDP-power-sequence-T9-fail.patch | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/common/recipes-kernel/linux/linux-yocto-4.14.71/0971-drm-amd-display-eDP-power-sequence-T9-fail.patch b/common/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/common/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 + |