Commit 49d067dc authored by Jacky Liao's avatar Jacky Liao Committed by Alex Deucher
Browse files

drm/amd/display: Add BLNDGAM memory shutdown support 



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

[How]
1. Write to BLNDGAM_MEM_PWR_FORCE to put memory to shutdown when BLNDGAM
   is not used.
2. Added a debug option to allow this behaviour to be turned off

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 63c954a1

drivers/gpu/drm/amd/display/dc/dcn30/dcn30_dpp.c

+10 −3
Original line number Diff line number Diff line
@@ -500,9 +500,14 @@ static void dpp3_power_on_blnd_lut( 
{

	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, BLNDGAM_MEM_PWR_FORCE, power_on ? 0 : 3);

		if (power_on)

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

	} else {

		REG_SET(CM_MEM_PWR_CTRL, 0,

				BLNDGAM_MEM_PWR_FORCE, power_on == true ? 0 : 1);



	}

}



static void dpp3_configure_blnd_lut(
@@ -675,6 +680,8 @@ bool dpp3_program_blnd_lut( 


	if (params == NULL) {

		REG_SET(CM_BLNDGAM_CONTROL, 0, CM_BLNDGAM_MODE, 0);

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

			dpp3_power_on_blnd_lut(dpp_base, false);

		return false;

	}

drivers/gpu/drm/amd/display/dc/dcn30/dcn30_dpp.h

+3 −1
Original line number Diff line number Diff line
@@ -343,6 +343,7 @@ 
	TF_SF(DSCL0_DSCL_MEM_PWR_CTRL, LUT_MEM_PWR_FORCE, mask_sh)



#define DPP_REG_LIST_SH_MASK_DCN30_UPDATED(mask_sh)\

	TF_SF(CM0_CM_MEM_PWR_STATUS, BLNDGAM_MEM_PWR_STATE, mask_sh), \

	TF_SF(CM0_CM_BLNDGAM_CONTROL, CM_BLNDGAM_MODE, mask_sh), \

	TF_SF(CM0_CM_BLNDGAM_CONTROL, CM_BLNDGAM_MODE_CURRENT, mask_sh), \

	TF_SF(CM0_CM_BLNDGAM_CONTROL, CM_BLNDGAM_SELECT_CURRENT, mask_sh), \
@@ -446,7 +447,8 @@ 
	type CM_BLNDGAM_MODE_CURRENT; \

	type CM_BLNDGAM_SELECT_CURRENT; \

	type CM_BLNDGAM_SELECT; \

	type GAMCOR_MEM_PWR_STATE

	type GAMCOR_MEM_PWR_STATE; \

	type BLNDGAM_MEM_PWR_STATE



struct dcn3_dpp_shift {

	DPP_REG_FIELD_LIST_DCN3(uint8_t);