From 1b3c451528349438ba619900e88d543caed9b597 Mon Sep 17 00:00:00 2001 From: Wenjing Liu Date: Fri, 29 Mar 2019 18:22:16 -0400 Subject: [PATCH 1809/2940] drm/amd/display: Add function to copy DC streams We'll need the ability to copy a dc_stream_state for some features. Implement it here. Signed-off-by: Wenjing Liu Reviewed-by: Jun Lei Acked-by: Leo Li --- .../gpu/drm/amd/display/dc/core/dc_stream.c | 21 +++++++++++++++++++ drivers/gpu/drm/amd/display/dc/dc_stream.h | 2 ++ 2 files changed, 23 insertions(+) diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_stream.c b/drivers/gpu/drm/amd/display/dc/core/dc_stream.c index e10479d58c11..09d765f359b0 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_stream.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_stream.c @@ -163,6 +163,27 @@ struct dc_stream_state *dc_create_stream_for_sink( return stream; } +struct dc_stream_state *dc_copy_stream(const struct dc_stream_state *stream) +{ + struct dc_stream_state *new_stream; + + new_stream = kzalloc(sizeof(struct dc_stream_state), GFP_KERNEL); + if (stream == NULL) + return NULL; + + memcpy(new_stream, stream, sizeof(struct dc_stream_state)); + + if (new_stream->sink) + dc_sink_retain(new_stream->sink); + + if (new_stream->out_transfer_func) + dc_transfer_func_retain(new_stream->out_transfer_func); + + kref_init(&new_stream->refcount); + + return new_stream; +} + /** * dc_stream_get_status_from_state - Get stream status from given dc state * @state: DC state to find the stream status in diff --git a/drivers/gpu/drm/amd/display/dc/dc_stream.h b/drivers/gpu/drm/amd/display/dc/dc_stream.h index 17fa3bf6cf7b..189bdab929a5 100644 --- a/drivers/gpu/drm/amd/display/dc/dc_stream.h +++ b/drivers/gpu/drm/amd/display/dc/dc_stream.h @@ -307,6 +307,8 @@ enum surface_update_type dc_check_update_surfaces_for_stream( */ struct dc_stream_state *dc_create_stream_for_sink(struct dc_sink *dc_sink); +struct dc_stream_state *dc_copy_stream(const struct dc_stream_state *stream); + void update_stream_signal(struct dc_stream_state *stream, struct dc_sink *sink); void dc_stream_retain(struct dc_stream_state *dc_stream); -- 2.17.1