diff options
| author | Mikita Lipski <mikita.lipski@amd.com> | 2017-10-17 22:29:22 +0300 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2017-12-06 20:47:22 +0300 |
| commit | fa2123dbccdc881fae02aaf8b05758db53d62955 (patch) | |
| tree | cdbeaec656d934980a48b8e60a97409ea587328c /drivers/gpu/drm/amd/display/dc/core | |
| parent | 79c631239a83aeb3e13216f2eda1741650645d64 (diff) | |
| download | linux-fa2123dbccdc881fae02aaf8b05758db53d62955.tar.xz | |
drm/amd/display: Multi display synchronization logic
This feature synchronizes multiple displays with various timings
to a display with the highest refresh rate
it is enabled if edid caps flag multi_display_sync is set to one
There are limitations on refresh rates allowed
that can be synchronized. That would
prevent from underflow and other potential
corruptions.
Multi display synchronization is using the
same functions as timing_sync in order to minimize
redunduncy and decision to disable synchronization is
based on trigger parametre set in DM
Feature is developed for DCN1 and DCE11
Signed-off-by: Mikita Lipski <mikita.lipski@amd.com>
Reviewed-by: Mikita Lipski <Mikita.Lipski@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/core')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/core/dc.c | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c index 55317c029d44..507b1171d65f 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc.c @@ -713,6 +713,28 @@ void dc_destroy(struct dc **dc) *dc = NULL; } +static void enable_timing_multisync( + struct dc *dc, + struct dc_state *ctx) +{ + int i = 0, multisync_count = 0; + int pipe_count = dc->res_pool->pipe_count; + struct pipe_ctx *multisync_pipes[MAX_PIPES] = { NULL }; + + for (i = 0; i < pipe_count; i++) { + if (!ctx->res_ctx.pipe_ctx[i].stream || + !ctx->res_ctx.pipe_ctx[i].stream->triggered_crtc_reset.enabled) + continue; + multisync_pipes[multisync_count] = &ctx->res_ctx.pipe_ctx[i]; + multisync_count++; + } + + if (multisync_count > 1) { + dc->hwss.enable_per_frame_crtc_position_reset( + dc, multisync_count, multisync_pipes); + } +} + static void program_timing_sync( struct dc *dc, struct dc_state *ctx) @@ -891,7 +913,9 @@ static enum dc_status dc_commit_state_no_check(struct dc *dc, struct dc_state *c } result = dc->hwss.apply_ctx_to_hw(dc, context); - program_timing_sync(dc, context); + if (context->stream_count > 1) + enable_timing_multisync(dc, context); + program_timing_sync(dc, context); dc_enable_stereo(dc, context, dc_streams, context->stream_count); |