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soc/intel/tigerlake: Allow fine grained control of S0iX states 

Expose devicetree parameter to enable/disable each individual substate.

See https://review.coreboot.org/c/coreboot/+/43741 for context.

TEST=util/abuild/abuild -t GOOGLE_VOLTEER -c max -x
BUG=b:154333137

Change-Id: I8a0cf820e20961486813067c6945fe07bc4899f7
Signed-off-by: jbk@chromium.org
Reviewed-on: https://review.coreboot.org/c/coreboot/+/44355
Reviewed-by: Furquan Shaikh <furquan@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Jes Klinke 2020-08-10 13:30:40 -07:00 committed by Patrick Georgi
parent 1df3b70c6a
commit 6fd87ffe2e
2 changed files with 25 additions and 0 deletions
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17
src/soc/intel/tigerlake/chip.h
View File

@ -56,6 +56,20 @@ enum fivr_voltage_supported {
#define FIVR_ENABLE_ALL_SX (FIVR_ENABLE_S0i1_S0i2 | FIVR_ENABLE_S0i3 | \
FIVR_ENABLE_S3 | FIVR_ENABLE_S4 | FIVR_ENABLE_S5)
/* Bit values for use in LpmStateEnableMask. */
enum lpm_state_mask {
LPM_S0i2_0 = BIT(0),
LPM_S0i2_1 = BIT(1),
LPM_S0i2_2 = BIT(2),
LPM_S0i3_0 = BIT(3),
LPM_S0i3_1 = BIT(4),
LPM_S0i3_2 = BIT(5),
LPM_S0i3_3 = BIT(6),
LPM_S0i3_4 = BIT(7),
LPM_S0iX_ALL = LPM_S0i2_0 | LPM_S0i2_1 | LPM_S0i2_2
| LPM_S0i3_0 | LPM_S0i3_1 | LPM_S0i3_2 | LPM_S0i3_3 | LPM_S0i3_4,
};
struct soc_intel_tigerlake_config {
/* Common struct containing soc config data required by common code */
@ -78,6 +92,9 @@ struct soc_intel_tigerlake_config {
/* Enable S0iX support */
int s0ix_enable;
/* S0iX: Selectively disable individual sub-states, by default all are enabled. */
enum lpm_state_mask LpmStateDisableMask;
/* Support for TCSS xhci, xdci, TBT PCIe root ports and DMA controllers */
uint8_t TcssD3HotDisable;
/* Support for TBT PCIe root ports and DMA controllers with D3Hot->D3Cold */

8
src/soc/intel/tigerlake/fsp_params.c
View File

@ -204,6 +204,14 @@ void platform_fsp_silicon_init_params_cb(FSPS_UPD *supd)
sizeof(params->SataPortsDevSlp));
}
/* S0iX: Selectively enable individual sub-states,
* by default all are enabled.
*
* LPM0-s0i2.0, LPM1-s0i2.1, LPM2-s0i2.2, LPM3-s0i3.0,
* LPM4-s0i3.1, LPM5-s0i3.2, LPM6-s0i3.3, LPM7-s0i3.4
*/
params->LpmStateEnableMask = LPM_S0iX_ALL & ~config->LpmStateDisableMask;
/*
* Power Optimizer for DMI and SATA.
* DmiPwrOptimizeDisable and SataPwrOptimizeDisable is default to 0.