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drm/amd/display: Add BLNDGAM memory shutdown support

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[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: Jacky Liao <ziyu.liao@amd.com>
Reviewed-by: Eric Yang <eric.yang2@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Jacky Liao 2020-11-11 18:29:42 -05:00 committed by Alex Deucher
parent 63c954a1ff
commit 49d067dcf2
2 changed files with 13 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

13
drivers/gpu/drm/amd/display/dc/dcn30/dcn30_dpp.c
View file

@ -500,9 +500,14 @@ static void dpp3_power_on_blnd_lut(
{
struct dcn3_dpp *dpp = TO_DCN30_DPP(dpp_base);
REG_SET(CM_MEM_PWR_CTRL, 0,
BLNDGAM_MEM_PWR_FORCE, power_on == true ? 0:1);
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;
}

4
drivers/gpu/drm/amd/display/dc/dcn30/dcn30_dpp.h
View file

@ -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);