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soc/mediatek/mt8195: Enable DCM 

Enable DCM settings on the MT8195 platform.
DCM means dynamic clock management, and it can dynamically
slow down or gate clocks during CPU or bus idle.

Change-Id: Ib431a0334c157d440d6e89dcb154241d980d97ce
Signed-off-by: Garmin Chang <garmin.chang@mediatek.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/56097
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
This commit is contained in:
Garmin Chang 2021-06-24 15:31:17 +08:00 committed by Patrick Georgi
parent 4ceaf46423
commit 6615c2d08c
2 changed files with 62 additions and 0 deletions
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41
src/soc/mediatek/mt8195/include/soc/pll.h
View File

@ -580,4 +580,45 @@ DEFINE_BITFIELD(CLK_MISC_CFG_0_METER_DIV, 31, 24)
DEFINE_BITFIELD(CLK26CALI_0_TRIGGER, 4, 4)
DEFINE_BITFIELD(CLK26CALI_1_LOAD_CNT, 25, 16)
enum {
INFRACFG_AO_AXIMEM_BUS_DCM_REG0_MASK = (0x1f << 12) | (0x1 << 17) | (0x1 << 18),
INFRACFG_AO_AXIMEM_BUS_DCM_REG0_ON = (0x10 << 12) | (0x1 << 17) | (0x0 << 18),
INFRACFG_AO_INFRA_BUS_DCM_REG0_MASK = (0x1 << 0) |
(0x1 << 1) |
(0x1 << 3) |
(0x1 << 4) |
(0x1f << 5) |
(0x1 << 20) |
(0x1 << 23) |
(0x1 << 30),
INFRACFG_AO_INFRA_BUS_DCM_REG0_ON = (0x1 << 0) |
(0x1 << 1) |
(0x0 << 3) |
(0x0 << 4) |
(0x10 << 5) |
(0x1 << 20) |
(0x1 << 23) |
(0x1 << 30),
INFRACFG_AO_INFRA_RX_P2P_DCM_REG0_MASK = (0xf << 0),
INFRACFG_AO_INFRA_RX_P2P_DCM_REG0_ON = (0x0 << 0),
INFRACFG_AO_PERI_BUS_DCM_REG0_MASK = (0x1 << 0) |
(0x1 << 1) |
(0x1 << 3) |
(0x1 << 4) |
(0x1f << 5) |
(0x1f << 15) |
(0x1 << 20) |
(0x1 << 21),
INFRACFG_AO_PERI_BUS_DCM_REG0_ON = (0x1 << 0) |
(0x1 << 1) |
(0x0 << 3) |
(0x0 << 4) |
(0x1f << 5) |
(0x1f << 15) |
(0x1 << 20) |
(0x1 << 21),
INFRACFG_AO_PERI_MODULE_DCM_REG0_MASK = (0x1 << 29) | (0x1 << 31),
INFRACFG_AO_PERI_MODULE_DCM_REG0_ON = (0x1 << 29) | (0x1 << 31),
};
#endif /* SOC_MEDIATEK_MT8195_PLL_H */

21
src/soc/mediatek/mt8195/pll.c
View File

@ -713,6 +713,27 @@ void mt_pll_init(void)
setbits32(&mt8195_infracfg_ao->infra_bus_dcm_ctrl, 0x3 << 21);
setbits32(&mt8195_infracfg_ao_bcrm->vdnr_dcm_top_infra_ctrl0, 0x2);
/* dcm_infracfg_ao_aximem_bus_dcm */
clrsetbits32(&mt8195_infracfg_ao->infra_aximem_idle_bit_en_0,
INFRACFG_AO_AXIMEM_BUS_DCM_REG0_MASK,
INFRACFG_AO_AXIMEM_BUS_DCM_REG0_ON);
/* dcm_infracfg_ao_infra_bus_dcm */
clrsetbits32(&mt8195_infracfg_ao->infra_bus_dcm_ctrl,
INFRACFG_AO_INFRA_BUS_DCM_REG0_MASK,
INFRACFG_AO_INFRA_BUS_DCM_REG0_ON);
/* dcm_infracfg_ao_infra_rx_p2p_dcm */
clrsetbits32(&mt8195_infracfg_ao->p2p_rx_clk_on,
INFRACFG_AO_INFRA_RX_P2P_DCM_REG0_MASK,
INFRACFG_AO_INFRA_RX_P2P_DCM_REG0_ON);
/* dcm_infracfg_ao_peri_bus_dcm */
clrsetbits32(&mt8195_infracfg_ao->peri_bus_dcm_ctrl,
INFRACFG_AO_PERI_BUS_DCM_REG0_MASK,
INFRACFG_AO_PERI_BUS_DCM_REG0_ON);
/* dcm_infracfg_ao_peri_module_dcm */
clrsetbits32(&mt8195_infracfg_ao->peri_bus_dcm_ctrl,
INFRACFG_AO_PERI_MODULE_DCM_REG0_MASK,
INFRACFG_AO_PERI_MODULE_DCM_REG0_ON);
/* initialize SPM request */
setbits32(&mtk_topckgen->clk_scp_cfg_0, 0x3ff);