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Diffstat (limited to 'common/recipes-kernel/linux/linux-yocto-4.19.8/1227-drm-amd-display-add-way-to-determine-if-link-is-acti.patch')
-rw-r--r--common/recipes-kernel/linux/linux-yocto-4.19.8/1227-drm-amd-display-add-way-to-determine-if-link-is-acti.patch78
1 files changed, 78 insertions, 0 deletions
diff --git a/common/recipes-kernel/linux/linux-yocto-4.19.8/1227-drm-amd-display-add-way-to-determine-if-link-is-acti.patch b/common/recipes-kernel/linux/linux-yocto-4.19.8/1227-drm-amd-display-add-way-to-determine-if-link-is-acti.patch
new file mode 100644
index 00000000..12a3f803
--- /dev/null
+++ b/common/recipes-kernel/linux/linux-yocto-4.19.8/1227-drm-amd-display-add-way-to-determine-if-link-is-acti.patch
@@ -0,0 +1,78 @@
+From 91ee7cb06c5503ae43043453a6cb33c34138cacc Mon Sep 17 00:00:00 2001
+From: Anthony Koo <Anthony.Koo@amd.com>
+Date: Sun, 20 Jan 2019 01:32:55 -0500
+Subject: [PATCH 1227/2940] drm/amd/display: add way to determine if link is
+ active
+
+[Why]
+Need to understand whether link is active aside from stream state.
+This could be used to check what links are enabled by GOP.
+
+[How]
+Store link_active state in link status and initialize it by checking
+if the DIG is enabled.
+Keep it updated on every link enable and disable
+
+Change-Id: I6d985d0ec11404bbaba7e4a23d4ca50d519aa0ac
+Signed-off-by: Anthony Koo <Anthony.Koo@amd.com>
+Reviewed-by: Aric Cyr <Aric.Cyr@amd.com>
+Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
+---
+ drivers/gpu/drm/amd/display/dc/core/dc_link.c | 4 ++++
+ drivers/gpu/drm/amd/display/dc/dc_link.h | 1 +
+ drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c | 5 +++++
+ 3 files changed, 10 insertions(+)
+
+diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link.c b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
+index 2f9d9b1f45cf..6058436642e9 100644
+--- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c
++++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
+@@ -2612,6 +2612,8 @@ void core_link_enable_stream(
+ }
+ }
+
++ stream->link->link_status.link_active = true;
++
+ core_dc->hwss.enable_audio_stream(pipe_ctx);
+
+ /* turn off otg test pattern if enable */
+@@ -2646,6 +2648,8 @@ void core_link_disable_stream(struct pipe_ctx *pipe_ctx, int option)
+ core_dc->hwss.disable_stream(pipe_ctx, option);
+
+ disable_link(pipe_ctx->stream->link, pipe_ctx->stream->signal);
++
++ pipe_ctx->stream->link->link_status.link_active = false;
+ }
+
+ void core_link_set_avmute(struct pipe_ctx *pipe_ctx, bool enable)
+diff --git a/drivers/gpu/drm/amd/display/dc/dc_link.h b/drivers/gpu/drm/amd/display/dc/dc_link.h
+index d26bbda61ad2..8fc223defed4 100644
+--- a/drivers/gpu/drm/amd/display/dc/dc_link.h
++++ b/drivers/gpu/drm/amd/display/dc/dc_link.h
+@@ -30,6 +30,7 @@
+ #include "grph_object_defs.h"
+
+ struct dc_link_status {
++ bool link_active;
+ struct dpcd_caps *dpcd_caps;
+ };
+
+diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
+index 2d7096bb0146..b32787ca5e25 100644
+--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
++++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
+@@ -1027,6 +1027,11 @@ static void dcn10_init_hw(struct dc *dc)
+ dc->hwss.edp_power_control(link, true);
+
+ link->link_enc->funcs->hw_init(link->link_enc);
++
++ /* Check for enabled DIG to identify enabled display */
++ if (link->link_enc->funcs->is_dig_enabled &&
++ link->link_enc->funcs->is_dig_enabled(link->link_enc))
++ link->link_status.link_active = true;
+ }
+ }
+
+--
+2.17.1
+