Commit 58c69b53 authored by Felipe Clark's avatar Felipe Clark Committed by Alex Deucher
Browse files

drm/amd/display: Fix black screen issue on memory clock switch en 



[WHY]
With some monitors when multi plane overlay is enabled the memory
clock switching mechanism has to change and, due to an error in the
initialization sequence, it may cause a black screen.

[HOW]
Change the firmware assisted memory clock switch initialization and
tear-down sequence utilizing the prepare_bandwidth and
optimize_bandwidth contexts.

Reviewed-by: default avatarAric Cyr <Aric.Cyr@amd.com>
Acked-by: default avatarWayne Lin <wayne.lin@amd.com>
Signed-off-by: default avatarFelipe Clark <feclark@amd.com>
Tested-by: default avatarDaniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 6421c495

drivers/gpu/drm/amd/display/dc/dcn30/dcn30_hwseq.c

+5 −0
Original line number Diff line number Diff line
@@ -355,6 +355,11 @@ void dcn30_prepare_bandwidth(struct dc *dc, 
 	dcn20_prepare_bandwidth(dc, context);

}



void dcn30_optimize_bandwidth(struct dc *dc, struct dc_state *context)

{

	dcn20_optimize_bandwidth(dc, context);

}



void dcn30_disable_writeback(

		struct dc *dc,

		unsigned int dwb_pipe_inst)

drivers/gpu/drm/amd/display/dc/dcn30/dcn30_hwseq.h

+3 −0
Original line number Diff line number Diff line
@@ -50,6 +50,9 @@ void dcn30_disable_writeback( 
void dcn30_prepare_bandwidth(struct dc *dc,

 	struct dc_state *context);



void dcn30_optimize_bandwidth(struct dc *dc,

	struct dc_state *context);



bool dcn30_mmhubbub_warmup(

	struct dc *dc,

	unsigned int num_dwb,

drivers/gpu/drm/amd/display/dc/dcn30/dcn30_init.c

+1 −1
Original line number Diff line number Diff line
@@ -60,7 +60,7 @@ static const struct hw_sequencer_funcs dcn30_funcs = { 
	.interdependent_update_lock = dcn10_lock_all_pipes,

	.cursor_lock = dcn10_cursor_lock,

	.prepare_bandwidth = dcn20_prepare_bandwidth,

	.optimize_bandwidth = dcn20_optimize_bandwidth,

	.optimize_bandwidth = dcn30_optimize_bandwidth,

	.update_bandwidth = dcn20_update_bandwidth,

	.set_drr = dcn10_set_drr,

	.get_position = dcn10_get_position,