From: Ravi Kumar Vodapalli <ravi.kumar.vodapalli@xxxxxxxxx>
Add Display Power Well for Xe2_LPD. It's mostly the same as Xe_LPD+,
so reuse the code. PGPICA1 contains type-C capable port slices
which requires the well to power powered up, so add new power well
definition for it.
The DC_OFF fake power well will be added in a follow up commit.
v2: Do not rmw as bit 31 is the only R/W bit in the regiser (Matt Roper)
BSpec: 68886
Signed-off-by: Ravi Kumar Vodapalli <ravi.kumar.vodapalli@xxxxxxxxx>
Signed-off-by: Gustavo Sousa <gustavo.sousa@xxxxxxxxx>
Signed-off-by: Lucas De Marchi <lucas.demarchi@xxxxxxxxx>
Reviewed-by: Matt Roper <matthew.d.roper@xxxxxxxxx>
---
.../i915/display/intel_display_power_map.c | 36 +++++++++++++++-
.../i915/display/intel_display_power_well.c | 41 +++++++++++++++++++
.../i915/display/intel_display_power_well.h | 1 +
.../gpu/drm/i915/display/intel_dp_aux_regs.h | 5 +++
4 files changed, 82 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/display/intel_display_power_map.c b/drivers/gpu/drm/i915/display/intel_display_power_map.c
index 0f1b93d139ca..31c11586ede5 100644
--- a/drivers/gpu/drm/i915/display/intel_display_power_map.c
+++ b/drivers/gpu/drm/i915/display/intel_display_power_map.c
@@ -1536,6 +1536,38 @@ static const struct i915_power_well_desc_list xelpdp_power_wells[] = {
I915_PW_DESCRIPTORS(xelpdp_power_wells_main),
};
+I915_DECL_PW_DOMAINS(xe2lpd_pwdoms_pica_tc,
+ POWER_DOMAIN_PORT_DDI_LANES_TC1,
+ POWER_DOMAIN_PORT_DDI_LANES_TC2,
+ POWER_DOMAIN_PORT_DDI_LANES_TC3,
+ POWER_DOMAIN_PORT_DDI_LANES_TC4,
+ POWER_DOMAIN_AUX_USBC1,
+ POWER_DOMAIN_AUX_USBC2,
+ POWER_DOMAIN_AUX_USBC3,
+ POWER_DOMAIN_AUX_USBC4,
+ POWER_DOMAIN_AUX_TBT1,
+ POWER_DOMAIN_AUX_TBT2,
+ POWER_DOMAIN_AUX_TBT3,
+ POWER_DOMAIN_AUX_TBT4,
+ POWER_DOMAIN_INIT);
+
+static const struct i915_power_well_desc xe2lpd_power_wells_pica[] = {
+ {
+ .instances = &I915_PW_INSTANCES(I915_PW("PICA_TC",
+ &xe2lpd_pwdoms_pica_tc,
+ .id = DISP_PW_ID_NONE),
+ ),
+ .ops = &xe2lpd_pica_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(xelpdp_power_wells_main),
+ I915_PW_DESCRIPTORS(xe2lpd_power_wells_pica),
+};
+
static void init_power_well_domains(const struct i915_power_well_instance *inst,
struct i915_power_well *power_well)
{
@@ -1643,7 +1675,9 @@ int intel_display_power_map_init(struct i915_power_domains *power_domains)
return 0;
}
- if (DISPLAY_VER(i915) >= 14)
+ if (DISPLAY_VER(i915) >= 20)
+ return set_power_wells(power_domains, xe2lpd_power_wells);
+ else if (DISPLAY_VER(i915) >= 14)
return set_power_wells(power_domains, xelpdp_power_wells);
else if (IS_DG2(i915))
return set_power_wells(power_domains, xehpd_power_wells);
diff --git a/drivers/gpu/drm/i915/display/intel_display_power_well.c b/drivers/gpu/drm/i915/display/intel_display_power_well.c
index ca0714eba17a..07d650050099 100644
--- a/drivers/gpu/drm/i915/display/intel_display_power_well.c
+++ b/drivers/gpu/drm/i915/display/intel_display_power_well.c
@@ -1833,6 +1833,40 @@ static bool xelpdp_aux_power_well_enabled(struct drm_i915_private *dev_priv,
XELPDP_DP_AUX_CH_CTL_POWER_STATUS;
}
+static void xe2lpd_pica_power_well_enable(struct drm_i915_private *dev_priv,
+ struct i915_power_well *power_well)
+{
+ intel_de_write(dev_priv, XE2LPD_PICA_PW_CTL,
+ XE2LPD_PICA_CTL_POWER_REQUEST);
+
+ if (intel_de_wait_for_set(dev_priv, XE2LPD_PICA_PW_CTL,
+ XE2LPD_PICA_CTL_POWER_STATUS, 1)) {
+ drm_dbg_kms(&dev_priv->drm, "pica power well enable timeout\n");
+
+ drm_WARN(&dev_priv->drm, 1, "Power well PICA timeout when enabled");
+ }
+}
+
+static void xe2lpd_pica_power_well_disable(struct drm_i915_private *dev_priv,
+ struct i915_power_well *power_well)
+{
+ intel_de_write(dev_priv, XE2LPD_PICA_PW_CTL, 0);
+
+ if (intel_de_wait_for_clear(dev_priv, XE2LPD_PICA_PW_CTL,
+ XE2LPD_PICA_CTL_POWER_STATUS, 1)) {
+ drm_dbg_kms(&dev_priv->drm, "pica power well disable timeout\n");
+
+ drm_WARN(&dev_priv->drm, 1, "Power well PICA timeout when disabled");
+ }
+}
+
+static bool xe2lpd_pica_power_well_enabled(struct drm_i915_private *dev_priv,
+ struct i915_power_well *power_well)
+{
+ return intel_de_read(dev_priv, XE2LPD_PICA_PW_CTL) &
+ XE2LPD_PICA_CTL_POWER_STATUS;
+}
+
const struct i915_power_well_ops i9xx_always_on_power_well_ops = {
.sync_hw = i9xx_power_well_sync_hw_noop,
.enable = i9xx_always_on_power_well_noop,
@@ -1952,3 +1986,10 @@ const struct i915_power_well_ops xelpdp_aux_power_well_ops = {
.disable = xelpdp_aux_power_well_disable,
.is_enabled = xelpdp_aux_power_well_enabled,
};
+
+const struct i915_power_well_ops xe2lpd_pica_power_well_ops = {
+ .sync_hw = i9xx_power_well_sync_hw_noop,
+ .enable = xe2lpd_pica_power_well_enable,
+ .disable = xe2lpd_pica_power_well_disable,
+ .is_enabled = xe2lpd_pica_power_well_enabled,
+};
diff --git a/drivers/gpu/drm/i915/display/intel_display_power_well.h b/drivers/gpu/drm/i915/display/intel_display_power_well.h
index a8736588314d..9357a9a73c06 100644
--- a/drivers/gpu/drm/i915/display/intel_display_power_well.h
+++ b/drivers/gpu/drm/i915/display/intel_display_power_well.h
@@ -176,5 +176,6 @@ extern const struct i915_power_well_ops icl_aux_power_well_ops;
extern const struct i915_power_well_ops icl_ddi_power_well_ops;
extern const struct i915_power_well_ops tgl_tc_cold_off_ops;
extern const struct i915_power_well_ops xelpdp_aux_power_well_ops;
+extern const struct i915_power_well_ops xe2lpd_pica_power_well_ops;
#endif
diff --git a/drivers/gpu/drm/i915/display/intel_dp_aux_regs.h b/drivers/gpu/drm/i915/display/intel_dp_aux_regs.h
index 9d141e86a4b6..e8f426d5ce20 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_aux_regs.h
+++ b/drivers/gpu/drm/i915/display/intel_dp_aux_regs.h
@@ -86,4 +86,9 @@
_XELPDP_DP_AUX_CH_DATA(__xe2lpd_aux_ch_idx(aux_ch), i) : \
_XELPDP_DP_AUX_CH_DATA(aux_ch, i))
+/* PICA Power Well Control */
+#define XE2LPD_PICA_PW_CTL _MMIO(0x16fe04)
+#define XE2LPD_PICA_CTL_POWER_REQUEST REG_BIT(31)
+#define XE2LPD_PICA_CTL_POWER_STATUS REG_BIT(30)
+
#endif /* __INTEL_DP_AUX_REGS_H__ */
--
2.40.1
