Commit 3ba0a5f3 authored by Jacky Liao's avatar Jacky Liao Committed by Alex Deucher
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drm/amd/display: Add GAMCOR memory shutdown support 



[Why]
The GAMCOR memory blocks should be powered down when they're not in use.
This will reduce power consumption.

[How]
Write to GAMCOR_MEM_PWR_FORCE to put memory to shutdown
when GAMCOR is not used.

Signed-off-by: default avatarJacky Liao <ziyu.liao@amd.com>
Reviewed-by: default avatarEric Yang <eric.yang2@amd.com>
Acked-by: default avatarRodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent fe270efa

drivers/gpu/drm/amd/display/dc/dcn30/dcn30_dpp_cm.c

+9 −3
Original line number Diff line number Diff line
@@ -136,7 +136,11 @@ static void dpp3_power_on_gamcor_lut( 
	uint32_t power_status;

	struct dcn3_dpp *dpp = TO_DCN30_DPP(dpp_base);





	if (dpp_base->ctx->dc->debug.enable_mem_low_power.bits.cm) {

		REG_UPDATE(CM_MEM_PWR_CTRL, GAMCOR_MEM_PWR_FORCE, power_on ? 0 : 3);

		if (power_on)

			REG_WAIT(CM_MEM_PWR_STATUS, GAMCOR_MEM_PWR_STATE, 0, 1, 5);

	} else

		REG_SET(CM_MEM_PWR_CTRL, 0,

				GAMCOR_MEM_PWR_DIS, power_on == true ? 0:1);
@@ -229,6 +233,8 @@ bool dpp3_program_gamcor_lut( 


	if (params == NULL) { //bypass if we have no pwl data

		REG_SET(CM_GAMCOR_CONTROL, 0, CM_GAMCOR_MODE, 0);

		if (dpp_base->ctx->dc->debug.enable_mem_low_power.bits.cm)

			dpp3_power_on_gamcor_lut(dpp_base, false);

		return false;

	}

	dpp3_power_on_gamcor_lut(dpp_base, true);