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Diffstat (limited to 'meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/4046-drm-amd-display-skip-enable-stream-on-disconnected-d.patch')
-rw-r--r--meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/4046-drm-amd-display-skip-enable-stream-on-disconnected-d.patch50
1 files changed, 50 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/4046-drm-amd-display-skip-enable-stream-on-disconnected-d.patch b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/4046-drm-amd-display-skip-enable-stream-on-disconnected-d.patch
new file mode 100644
index 00000000..551a7e35
--- /dev/null
+++ b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/4046-drm-amd-display-skip-enable-stream-on-disconnected-d.patch
@@ -0,0 +1,50 @@
+From c3fbc13c0bf2901059b8001f19d640449ddf3b57 Mon Sep 17 00:00:00 2001
+From: Wenjing Liu <Wenjing.Liu@amd.com>
+Date: Tue, 3 Sep 2019 17:15:48 -0400
+Subject: [PATCH 4046/4256] drm/amd/display: skip enable stream on disconnected
+ display
+
+[why]
+Virtual signal means there is no display attached.
+In this case we will assign a virtual signal type to the stream.
+We should only enable the front end of the stream but not the back end.
+
+[how]
+When stream is enabling with virtual signal type, skip backend programming.
+
+Signed-off-by: Wenjing Liu <Wenjing.Liu@amd.com>
+Reviewed-by: Jun Lei <Jun.Lei@amd.com>
+Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
+---
+ drivers/gpu/drm/amd/display/dc/core/dc_link.c | 8 ++++++++
+ 1 file changed, 8 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 ec2a249c13f0..ca4a57510e8c 100644
+--- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c
++++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
+@@ -2716,6 +2716,10 @@ void core_link_enable_stream(
+ enum dc_status status;
+ DC_LOGGER_INIT(pipe_ctx->stream->ctx->logger);
+
++ if (!IS_FPGA_MAXIMUS_DC(core_dc->ctx->dce_environment) &&
++ dc_is_virtual_signal(pipe_ctx->stream->signal))
++ return;
++
+ if (!dc_is_virtual_signal(pipe_ctx->stream->signal)) {
+ stream->link->link_enc->funcs->setup(
+ stream->link->link_enc,
+@@ -2858,6 +2862,10 @@ void core_link_disable_stream(struct pipe_ctx *pipe_ctx)
+ struct dc_stream_state *stream = pipe_ctx->stream;
+ struct dc_link *link = stream->sink->link;
+
++ if (!IS_FPGA_MAXIMUS_DC(core_dc->ctx->dce_environment) &&
++ dc_is_virtual_signal(pipe_ctx->stream->signal))
++ return;
++
+ #if defined(CONFIG_DRM_AMD_DC_HDCP)
+ update_psp_stream_config(pipe_ctx, true);
+ #endif
+--
+2.17.1
+