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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 <Wenjing.Liu@amd.com>
Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Wenjing Liu 2019-03-29 18:22:16 -04:00 committed by Alex Deucher
parent 41629f02c6
commit 43e3ac8389
2 changed files with 23 additions and 0 deletions
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21
drivers/gpu/drm/amd/display/dc/core/dc_stream.c
View File

@ -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

2
drivers/gpu/drm/amd/display/dc/dc_stream.h
View File

@ -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);