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drm/i915/xe2lpd: Add DC state support

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Xe2_LPD supports DC5, DC6, and DC9 (DC3CO no longer exists).  The
overall programming and requirements to enter DC states are similar to
those of Xe_LPD+ although AUX transactions do not require DC5/DC6 exit
as they did previously.

Bspec: 68851, 68857, 68886, 69115
Cc: Anusha Srivatsa <anusha.srivatsa@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Anusha Srivatsa <anusha.srivatsa@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230919192128.2045154-21-lucas.demarchi@intel.com
This commit is contained in:
Matt Roper 2023-09-19 12:21:27 -07:00 committed by Lucas De Marchi
parent c2d9d8e7ee
commit 43e18b0a54
2 changed files with 21 additions and 1 deletions
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4
drivers/gpu/drm/i915/display/intel_display_power.c
View file

@ -943,7 +943,9 @@ static u32 get_allowed_dc_mask(const struct drm_i915_private *dev_priv,
if (!HAS_DISPLAY(dev_priv))
return 0;
if (IS_DG2(dev_priv))
if (DISPLAY_VER(dev_priv) >= 20)
max_dc = 2;
else if (IS_DG2(dev_priv))
max_dc = 1;
else if (IS_DG1(dev_priv))
max_dc = 3;

18
drivers/gpu/drm/i915/display/intel_display_power_map.c
View file

@ -1561,9 +1561,27 @@ static const struct i915_power_well_desc xe2lpd_power_wells_pica[] = {
},
};
I915_DECL_PW_DOMAINS(xe2lpd_pwdoms_dc_off,
POWER_DOMAIN_DC_OFF,
XELPD_PW_C_POWER_DOMAINS,
XELPD_PW_D_POWER_DOMAINS,
POWER_DOMAIN_AUDIO_MMIO,
POWER_DOMAIN_INIT);
static const struct i915_power_well_desc xe2lpd_power_wells_dcoff[] = {
{
.instances = &I915_PW_INSTANCES(
I915_PW("DC_off", &xe2lpd_pwdoms_dc_off,
.id = SKL_DISP_DC_OFF),
),
.ops = &gen9_dc_off_power_well_ops,
},
};
static const struct i915_power_well_desc_list xe2lpd_power_wells[] = {
I915_PW_DESCRIPTORS(i9xx_power_wells_always_on),
I915_PW_DESCRIPTORS(icl_power_wells_pw_1),
I915_PW_DESCRIPTORS(xe2lpd_power_wells_dcoff),
I915_PW_DESCRIPTORS(xelpdp_power_wells_main),
I915_PW_DESCRIPTORS(xe2lpd_power_wells_pica),
};