Export headless sku bit (bit 13) from opregion->header->pcon as an
interface to check if our device is headless configuration.
Bspec: 53441
Signed-off-by: Jouni Högander <jouni.hogander@xxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_opregion.c | 12 ++++++++++++
drivers/gpu/drm/i915/display/intel_opregion.h | 7 +++++++
2 files changed, 19 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/intel_opregion.c b/drivers/gpu/drm/i915/display/intel_opregion.c
index f31e8c3f8ce0..eab3f2e6b786 100644
--- a/drivers/gpu/drm/i915/display/intel_opregion.c
+++ b/drivers/gpu/drm/i915/display/intel_opregion.c
@@ -53,6 +53,8 @@
#define MBOX_ASLE_EXT BIT(4) /* Mailbox #5 */
#define MBOX_BACKLIGHT BIT(5) /* Mailbox #2 (valid from v3.x) */
+#define PCON_HEADLESS_SKU BIT(13)
+
struct opregion_header {
u8 signature[16];
u32 size;
@@ -1135,6 +1137,16 @@ struct edid *intel_opregion_get_edid(struct intel_connector *intel_connector)
return new_edid;
}
+bool intel_opregion_headless_sku(struct drm_i915_private *i915)
+{
+ struct intel_opregion *opregion = &i915->opregion;
+
+ if (!opregion->header)
+ return false;
+
+ return opregion->header->pcon & PCON_HEADLESS_SKU;
+}
+
void intel_opregion_register(struct drm_i915_private *i915)
{
struct intel_opregion *opregion = &i915->opregion;
diff --git a/drivers/gpu/drm/i915/display/intel_opregion.h b/drivers/gpu/drm/i915/display/intel_opregion.h
index 82cc0ba34af7..5ad96e1d8278 100644
--- a/drivers/gpu/drm/i915/display/intel_opregion.h
+++ b/drivers/gpu/drm/i915/display/intel_opregion.h
@@ -76,6 +76,8 @@ int intel_opregion_notify_adapter(struct drm_i915_private *dev_priv,
int intel_opregion_get_panel_type(struct drm_i915_private *dev_priv);
struct edid *intel_opregion_get_edid(struct intel_connector *connector);
+bool intel_opregion_headless_sku(struct drm_i915_private *i915);
+
#else /* CONFIG_ACPI*/
static inline int intel_opregion_setup(struct drm_i915_private *dev_priv)
@@ -127,6 +129,11 @@ intel_opregion_get_edid(struct intel_connector *connector)
return NULL;
}
+bool intel_opregion_headless_sku(struct drm_i915_private *i915)
+{
+ return false;
+}
+
#endif /* CONFIG_ACPI */
#endif
--
2.25.1
