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authorAric Cyr <aric.cyr@amd.com>2020-12-10 12:11:32 -0500
committerAlex Deucher <alexander.deucher@amd.com>2020-12-23 15:02:18 -0500
commita71e5529d2674584fda0fa09a7de4efc8e17160d (patch)
tree30a17ffc0781b5876199d9a219cf26e800337d22 /drivers
parentcbac53f7fc90754b898e79ab2d5c11052ce1b640 (diff)
drm/amd/display: Multi-display underflow observed
[Why] FP2 programming not happening when topology changes occur with multiple displays. [How] Ensure FP2 is programmed whenever global sync changes occur but wait for VACTIVE first to avoid underflow. Signed-off-by: Aric Cyr <aric.cyr@amd.com> Acked-by: Bindu Ramamurthy <bindu.r@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/gpu/drm/amd/display/dc/core/dc.c20
-rw-r--r--drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c12
2 files changed, 9 insertions, 23 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c
index 7339d9855ec8..58eb0d69873a 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -2625,26 +2625,6 @@ static void commit_planes_for_stream(struct dc *dc,
}
}
- if (update_type != UPDATE_TYPE_FAST) {
- // If changing VTG FP2: wait until back in vactive to program FP2
- // Need to ensure that pipe unlock happens soon after to minimize race condition
- for (i = 0; i < dc->res_pool->pipe_count; i++) {
- struct pipe_ctx *pipe_ctx = &context->res_ctx.pipe_ctx[i];
-
- if (pipe_ctx->top_pipe || pipe_ctx->stream != stream)
- continue;
-
- if (!pipe_ctx->update_flags.bits.global_sync)
- continue;
-
- pipe_ctx->stream_res.tg->funcs->wait_for_state(pipe_ctx->stream_res.tg, CRTC_STATE_VBLANK);
- pipe_ctx->stream_res.tg->funcs->wait_for_state(pipe_ctx->stream_res.tg, CRTC_STATE_VACTIVE);
-
- pipe_ctx->stream_res.tg->funcs->set_vtg_params(
- pipe_ctx->stream_res.tg, &pipe_ctx->stream->timing, true);
- }
- }
-
if ((update_type != UPDATE_TYPE_FAST) && dc->hwss.interdependent_update_lock)
dc->hwss.interdependent_update_lock(dc, context, false);
else
diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
index 31a477194d3b..cb822df21b7c 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
@@ -1586,7 +1586,10 @@ static void dcn20_program_pipe(
&& !pipe_ctx->top_pipe && !pipe_ctx->prev_odm_pipe)
hws->funcs.blank_pixel_data(dc, pipe_ctx, !pipe_ctx->plane_state->visible);
- if (pipe_ctx->update_flags.bits.global_sync) {
+ /* Only update TG on top pipe */
+ if (pipe_ctx->update_flags.bits.global_sync && !pipe_ctx->top_pipe
+ && !pipe_ctx->prev_odm_pipe) {
+
pipe_ctx->stream_res.tg->funcs->program_global_sync(
pipe_ctx->stream_res.tg,
pipe_ctx->pipe_dlg_param.vready_offset,
@@ -1594,8 +1597,11 @@ static void dcn20_program_pipe(
pipe_ctx->pipe_dlg_param.vupdate_offset,
pipe_ctx->pipe_dlg_param.vupdate_width);
+ pipe_ctx->stream_res.tg->funcs->wait_for_state(pipe_ctx->stream_res.tg, CRTC_STATE_VBLANK);
+ pipe_ctx->stream_res.tg->funcs->wait_for_state(pipe_ctx->stream_res.tg, CRTC_STATE_VACTIVE);
+
pipe_ctx->stream_res.tg->funcs->set_vtg_params(
- pipe_ctx->stream_res.tg, &pipe_ctx->stream->timing, false);
+ pipe_ctx->stream_res.tg, &pipe_ctx->stream->timing, true);
if (hws->funcs.setup_vupdate_interrupt)
hws->funcs.setup_vupdate_interrupt(dc, pipe_ctx);
@@ -2570,4 +2576,4 @@ void dcn20_set_disp_pattern_generator(const struct dc *dc,
{
pipe_ctx->stream_res.opp->funcs->opp_set_disp_pattern_generator(pipe_ctx->stream_res.opp, test_pattern,
color_space, color_depth, solid_color, width, height, offset);
-} \ No newline at end of file
+}