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Commit f358b39d authored by Jerry (Fangzhi) Zuo's avatar Jerry (Fangzhi) Zuo Committed by Alex Deucher
Browse files

drm/amd/display: Fix Vega10 black screen after mode change 



[Why]
The sequence is slightly changed when bring .set_bandwidth out
from the end of programming backend to the end of programming
surface. Vega10 doesn't like to get clocks updated if
stream_count is zero in the current context (Atomic Reset).

[How]
Do not update clocks if no stream is showing up in the context.

Fixes 1b2b130192 "dc: Remove 300Mhz minimum disp clk limit."

Signed-off-by: default avatarJerry (Fangzhi) Zuo <Jerry.Zuo@amd.com>
Reviewed-by: default avatarTony Cheng <Tony.Cheng@amd.com>
Acked-by: default avatarBhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 65c78961

drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c

+1 −1
Original line number Diff line number Diff line
@@ -2552,7 +2552,7 @@ static void pplib_apply_display_requirements( 
	dc->prev_display_config = *pp_display_cfg;

}



static void dce110_set_bandwidth(

void dce110_set_bandwidth(

		struct dc *dc,

		struct dc_state *context,

		bool decrease_allowed)

drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.h

+5 −0
Original line number Diff line number Diff line
@@ -68,6 +68,11 @@ void dce110_fill_display_configs( 
	const struct dc_state *context,

	struct dm_pp_display_configuration *pp_display_cfg);



void dce110_set_bandwidth(

		struct dc *dc,

		struct dc_state *context,

		bool decrease_allowed);



uint32_t dce110_get_min_vblank_time_us(const struct dc_state *context);



void dp_receiver_power_ctrl(struct dc_link *link, bool on);

drivers/gpu/drm/amd/display/dc/dce120/dce120_hw_sequencer.c

+10 −0
Original line number Diff line number Diff line
@@ -244,7 +244,16 @@ static void dce120_update_dchub( 
	dh_data->dchub_info_valid = false;

}



static void dce120_set_bandwidth(

		struct dc *dc,

		struct dc_state *context,

		bool decrease_allowed)

{

	if (context->stream_count <= 0)

		return;



	dce110_set_bandwidth(dc, context, decrease_allowed);

}



void dce120_hw_sequencer_construct(struct dc *dc)

{
@@ -254,5 +263,6 @@ void dce120_hw_sequencer_construct(struct dc *dc) 
	dce110_hw_sequencer_construct(dc);

	dc->hwss.enable_display_power_gating = dce120_enable_display_power_gating;

	dc->hwss.update_dchub = dce120_update_dchub;

	dc->hwss.set_bandwidth = dce120_set_bandwidth;

}