diff options
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_acpi.c')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_acpi.c | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_acpi.c b/drivers/gpu/drm/i915/display/intel_acpi.c index 3456d33feb46..e21fb14d5e07 100644 --- a/drivers/gpu/drm/i915/display/intel_acpi.c +++ b/drivers/gpu/drm/i915/display/intel_acpi.c @@ -10,6 +10,7 @@ #include "i915_drv.h" #include "intel_acpi.h" +#include "intel_display_types.h" #define INTEL_DSM_REVISION_ID 1 /* For Calpella anyway... */ #define INTEL_DSM_FN_PLATFORM_MUX_INFO 1 /* No args */ @@ -156,3 +157,91 @@ void intel_register_dsm_handler(void) void intel_unregister_dsm_handler(void) { } + +/* + * ACPI Specification, Revision 5.0, Appendix B.3.2 _DOD (Enumerate All Devices + * Attached to the Display Adapter). + */ +#define ACPI_DISPLAY_INDEX_SHIFT 0 +#define ACPI_DISPLAY_INDEX_MASK (0xf << 0) +#define ACPI_DISPLAY_PORT_ATTACHMENT_SHIFT 4 +#define ACPI_DISPLAY_PORT_ATTACHMENT_MASK (0xf << 4) +#define ACPI_DISPLAY_TYPE_SHIFT 8 +#define ACPI_DISPLAY_TYPE_MASK (0xf << 8) +#define ACPI_DISPLAY_TYPE_OTHER (0 << 8) +#define ACPI_DISPLAY_TYPE_VGA (1 << 8) +#define ACPI_DISPLAY_TYPE_TV (2 << 8) +#define ACPI_DISPLAY_TYPE_EXTERNAL_DIGITAL (3 << 8) +#define ACPI_DISPLAY_TYPE_INTERNAL_DIGITAL (4 << 8) +#define ACPI_VENDOR_SPECIFIC_SHIFT 12 +#define ACPI_VENDOR_SPECIFIC_MASK (0xf << 12) +#define ACPI_BIOS_CAN_DETECT (1 << 16) +#define ACPI_DEPENDS_ON_VGA (1 << 17) +#define ACPI_PIPE_ID_SHIFT 18 +#define ACPI_PIPE_ID_MASK (7 << 18) +#define ACPI_DEVICE_ID_SCHEME (1ULL << 31) + +static u32 acpi_display_type(struct intel_connector *connector) +{ + u32 display_type; + + switch (connector->base.connector_type) { + case DRM_MODE_CONNECTOR_VGA: + case DRM_MODE_CONNECTOR_DVIA: + display_type = ACPI_DISPLAY_TYPE_VGA; + break; + case DRM_MODE_CONNECTOR_Composite: + case DRM_MODE_CONNECTOR_SVIDEO: + case DRM_MODE_CONNECTOR_Component: + case DRM_MODE_CONNECTOR_9PinDIN: + case DRM_MODE_CONNECTOR_TV: + display_type = ACPI_DISPLAY_TYPE_TV; + break; + case DRM_MODE_CONNECTOR_DVII: + case DRM_MODE_CONNECTOR_DVID: + case DRM_MODE_CONNECTOR_DisplayPort: + case DRM_MODE_CONNECTOR_HDMIA: + case DRM_MODE_CONNECTOR_HDMIB: + display_type = ACPI_DISPLAY_TYPE_EXTERNAL_DIGITAL; + break; + case DRM_MODE_CONNECTOR_LVDS: + case DRM_MODE_CONNECTOR_eDP: + case DRM_MODE_CONNECTOR_DSI: + display_type = ACPI_DISPLAY_TYPE_INTERNAL_DIGITAL; + break; + case DRM_MODE_CONNECTOR_Unknown: + case DRM_MODE_CONNECTOR_VIRTUAL: + display_type = ACPI_DISPLAY_TYPE_OTHER; + break; + default: + MISSING_CASE(connector->base.connector_type); + display_type = ACPI_DISPLAY_TYPE_OTHER; + break; + } + + return display_type; +} + +void intel_acpi_device_id_update(struct drm_i915_private *dev_priv) +{ + struct drm_device *drm_dev = &dev_priv->drm; + struct intel_connector *connector; + struct drm_connector_list_iter conn_iter; + u8 display_index[16] = {}; + + /* Populate the ACPI IDs for all connectors for a given drm_device */ + drm_connector_list_iter_begin(drm_dev, &conn_iter); + for_each_intel_connector_iter(connector, &conn_iter) { + u32 device_id, type; + + device_id = acpi_display_type(connector); + + /* Use display type specific display index. */ + type = (device_id & ACPI_DISPLAY_TYPE_MASK) + >> ACPI_DISPLAY_TYPE_SHIFT; + device_id |= display_index[type]++ << ACPI_DISPLAY_INDEX_SHIFT; + + connector->acpi_device_id = device_id; + } + drm_connector_list_iter_end(&conn_iter); +} |