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drm/amd/display: Add GAMCOR memory shutdown support

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[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: 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 2020-11-12 16:18:10 -05:00 committed by Alex Deucher
parent fe270efa32
commit 3ba0a5f3ee
1 changed files with 9 additions and 3 deletions
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12
drivers/gpu/drm/amd/display/dc/dcn30/dcn30_dpp_cm.c
View file

@ -136,9 +136,13 @@ static void dpp3_power_on_gamcor_lut(
uint32_t power_status;
struct dcn3_dpp *dpp = TO_DCN30_DPP(dpp_base);
REG_SET(CM_MEM_PWR_CTRL, 0,
GAMCOR_MEM_PWR_DIS, power_on == true ? 0:1);
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);
REG_GET(CM_MEM_PWR_STATUS, GAMCOR_MEM_PWR_STATE, &power_status);
if (power_status != 0)
@ -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);