diff options
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dp.c | 8 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_opregion.c | 55 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_opregion.h | 10 |
3 files changed, 72 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c index b5e2508db1cf..d6d8c9922feb 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.c +++ b/drivers/gpu/drm/i915/display/intel_dp.c @@ -4974,6 +4974,14 @@ static bool intel_edp_init_connector(struct intel_dp *intel_dp, mutex_lock(&dev->mode_config.mutex); edid = drm_get_edid(connector, &intel_dp->aux.ddc); + if (!edid) { + /* Fallback to EDID from ACPI OpRegion, if any */ + edid = intel_opregion_get_edid(intel_connector); + if (edid) + drm_dbg_kms(&dev_priv->drm, + "[CONNECTOR:%d:%s] Using OpRegion EDID\n", + connector->base.id, connector->name); + } if (edid) { if (drm_add_edid_modes(connector, edid)) { drm_connector_update_edid_property(connector, edid); diff --git a/drivers/gpu/drm/i915/display/intel_opregion.c b/drivers/gpu/drm/i915/display/intel_opregion.c index 0065111593a6..985790a66a4d 100644 --- a/drivers/gpu/drm/i915/display/intel_opregion.c +++ b/drivers/gpu/drm/i915/display/intel_opregion.c @@ -195,6 +195,8 @@ struct opregion_asle_ext { #define ASLE_IUER_WINDOWS_BTN (1 << 1) #define ASLE_IUER_POWER_BTN (1 << 0) +#define ASLE_PHED_EDID_VALID_MASK 0x3 + /* Software System Control Interrupt (SWSCI) */ #define SWSCI_SCIC_INDICATOR (1 << 0) #define SWSCI_SCIC_MAIN_FUNCTION_SHIFT 1 @@ -908,8 +910,10 @@ int intel_opregion_setup(struct drm_i915_private *dev_priv) opregion->asle->ardy = ASLE_ARDY_NOT_READY; } - if (mboxes & MBOX_ASLE_EXT) + if (mboxes & MBOX_ASLE_EXT) { drm_dbg(&dev_priv->drm, "ASLE extension supported\n"); + opregion->asle_ext = base + OPREGION_ASLE_EXT_OFFSET; + } if (intel_load_vbt_firmware(dev_priv) == 0) goto out; @@ -1036,6 +1040,54 @@ intel_opregion_get_panel_type(struct drm_i915_private *dev_priv) return ret - 1; } +/** + * intel_opregion_get_edid - Fetch EDID from ACPI OpRegion mailbox #5 + * @intel_connector: eDP connector + * + * This reads the ACPI Opregion mailbox #5 to extract the EDID that is passed + * to it. + * + * Returns: + * The EDID in the OpRegion, or NULL if there is none or it's invalid. + * + */ +struct edid *intel_opregion_get_edid(struct intel_connector *intel_connector) +{ + struct drm_connector *connector = &intel_connector->base; + struct drm_i915_private *i915 = to_i915(connector->dev); + struct intel_opregion *opregion = &i915->opregion; + const void *in_edid; + const struct edid *edid; + struct edid *new_edid; + int len; + + if (!opregion->asle_ext) + return NULL; + + in_edid = opregion->asle_ext->bddc; + + /* Validity corresponds to number of 128-byte blocks */ + len = (opregion->asle_ext->phed & ASLE_PHED_EDID_VALID_MASK) * 128; + if (!len || !memchr_inv(in_edid, 0, len)) + return NULL; + + edid = in_edid; + + if (len < EDID_LENGTH * (1 + edid->extensions)) { + drm_dbg_kms(&i915->drm, "Invalid EDID in ACPI OpRegion (Mailbox #5): too short\n"); + return NULL; + } + new_edid = drm_edid_duplicate(edid); + if (!new_edid) + return NULL; + if (!drm_edid_is_valid(new_edid)) { + kfree(new_edid); + drm_dbg_kms(&i915->drm, "Invalid EDID in ACPI OpRegion (Mailbox #5)\n"); + return NULL; + } + return new_edid; +} + void intel_opregion_register(struct drm_i915_private *i915) { struct intel_opregion *opregion = &i915->opregion; @@ -1129,6 +1181,7 @@ void intel_opregion_unregister(struct drm_i915_private *i915) opregion->acpi = NULL; opregion->swsci = NULL; opregion->asle = NULL; + opregion->asle_ext = NULL; opregion->vbt = NULL; opregion->lid_state = NULL; } diff --git a/drivers/gpu/drm/i915/display/intel_opregion.h b/drivers/gpu/drm/i915/display/intel_opregion.h index 4aa68ffbd30e..82cc0ba34af7 100644 --- a/drivers/gpu/drm/i915/display/intel_opregion.h +++ b/drivers/gpu/drm/i915/display/intel_opregion.h @@ -29,12 +29,14 @@ #include <linux/pci.h> struct drm_i915_private; +struct intel_connector; struct intel_encoder; struct opregion_header; struct opregion_acpi; struct opregion_swsci; struct opregion_asle; +struct opregion_asle_ext; struct intel_opregion { struct opregion_header *header; @@ -43,6 +45,7 @@ struct intel_opregion { u32 swsci_gbda_sub_functions; u32 swsci_sbcb_sub_functions; struct opregion_asle *asle; + struct opregion_asle_ext *asle_ext; void *rvda; void *vbt_firmware; const void *vbt; @@ -71,6 +74,7 @@ int intel_opregion_notify_encoder(struct intel_encoder *intel_encoder, int intel_opregion_notify_adapter(struct drm_i915_private *dev_priv, pci_power_t state); int intel_opregion_get_panel_type(struct drm_i915_private *dev_priv); +struct edid *intel_opregion_get_edid(struct intel_connector *connector); #else /* CONFIG_ACPI*/ @@ -117,6 +121,12 @@ static inline int intel_opregion_get_panel_type(struct drm_i915_private *dev) return -ENODEV; } +static inline struct edid * +intel_opregion_get_edid(struct intel_connector *connector) +{ + return NULL; +} + #endif /* CONFIG_ACPI */ #endif |