diff options
| author | Jun Lei <Jun.Lei@amd.com> | 2018-11-09 09:21:21 -0500 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2019-01-14 15:04:36 -0500 |
| commit | ceb3dbb4690db8377ad127a5666cd4775d9f70f4 (patch) | |
| tree | e637e1794f4dd7df81ccc0ade7c25d09951fbafc /drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c | |
| parent | 51ba137ef226255bb13578da13e8a9030c5ad019 (diff) | |
drm/amd/display: remove sink reference in dc_stream_state
[why]
dc_stream_state containing a pointer to sink is poor design.
Sink describes the display, and the specifications or capabilities
it has. That information is irrelevant for dc_stream_state, which describes
hardware state, and is generally used for hardware programming. It
could further be argued that dc_sink itself is just a convenience dc
provides, and DC should be perfectly capable of programming hardware
without any dc_sinks (for example, emulated sinks).
[how]
Phase 1:
Deprecate use of dc_sink pointer in dc_stream. Most references are trivial
to remove, but some call sites are risky (such as is_timing_changed) with
no obvious logical replacement. These will be removed in follow up change.
Add dc_link pointer to dc_stream. This is the typical reason DC really needed
sink pointer, and most call sites are replaced with this.
DMs also need minor updates, as all 3 DMs leverage stream->sink for
some functionality. this is replaced instead by a pointer to private data
inside dc_stream_state, which is used by DMs as a quality of life improvment
for some key functionality. it allows DMs to set pointers have to their own objects
which associate OS objects to dc_stream_states (such as DisplayTarget
and amdgpu_dm_connector). Without the private pointer, DMs would be
forced to perform a lookup for callbacks.
Signed-off-by: Jun Lei <Jun.Lei@amd.com>
Reviewed-by: Aric Cyr <Aric.Cyr@amd.com>
Acked-by: David Francis <David.Francis@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c | 9 |
1 files changed, 3 insertions, 6 deletions
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 0065ec7d5330..a179c09580c3 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 @@ -70,8 +70,7 @@ void dp_enable_link_phy( */ for (i = 0; i < MAX_PIPES; i++) { if (pipes[i].stream != NULL && - pipes[i].stream->sink != NULL && - pipes[i].stream->sink->link == link) { + pipes[i].stream->link == link) { if (pipes[i].clock_source != NULL && pipes[i].clock_source->id != CLOCK_SOURCE_ID_DP_DTO) { pipes[i].clock_source = dp_cs; @@ -279,10 +278,8 @@ void dp_retrain_link_dp_test(struct dc_link *link, for (i = 0; i < MAX_PIPES; i++) { if (pipes[i].stream != NULL && !pipes[i].top_pipe && - pipes[i].stream->sink != NULL && - pipes[i].stream->sink->link != NULL && - pipes[i].stream_res.stream_enc != NULL && - pipes[i].stream->sink->link == link) { + pipes[i].stream->link != NULL && + pipes[i].stream_res.stream_enc != NULL) { udelay(100); pipes[i].stream_res.stream_enc->funcs->dp_blank( |