diff options
| -rw-r--r-- | drivers/gpu/drm/i915/intel_opregion.c | 28 |
1 files changed, 21 insertions, 7 deletions
diff --git a/drivers/gpu/drm/i915/intel_opregion.c b/drivers/gpu/drm/i915/intel_opregion.c index 6235d9acce45..7df916e914a4 100644 --- a/drivers/gpu/drm/i915/intel_opregion.c +++ b/drivers/gpu/drm/i915/intel_opregion.c @@ -669,7 +669,7 @@ static void intel_didl_outputs(struct drm_device *dev) struct acpi_device *acpi_dev, *acpi_cdev, *acpi_video_bus = NULL; unsigned long long device_id; acpi_status status; - u32 temp; + u32 temp, max_outputs; int i = 0; handle = ACPI_HANDLE(&dev->pdev->dev); @@ -692,9 +692,20 @@ static void intel_didl_outputs(struct drm_device *dev) return; } + /* + * In theory, did2, the extended didl, gets added at opregion version + * 3.0. In practice, however, we're supposed to set it for earlier + * versions as well, since a BIOS that doesn't understand did2 should + * not look at it anyway. Use a variable so we can tweak this if a need + * arises later. + */ + max_outputs = ARRAY_SIZE(opregion->acpi->didl) + + ARRAY_SIZE(opregion->acpi->did2); + list_for_each_entry(acpi_cdev, &acpi_video_bus->children, node) { - if (i >= 8) { - DRM_DEBUG_KMS("More than 8 outputs detected via ACPI\n"); + if (i >= max_outputs) { + DRM_DEBUG_KMS("More than %u outputs detected via ACPI\n", + max_outputs); return; } status = acpi_evaluate_integer(acpi_cdev->handle, "_ADR", @@ -707,8 +718,10 @@ static void intel_didl_outputs(struct drm_device *dev) } end: - /* If fewer than 8 outputs, the list must be null terminated */ - if (i < 8) + DRM_DEBUG_KMS("%d outputs detected\n", i); + + /* If fewer than max outputs, the list must be null terminated */ + if (i < max_outputs) set_did(opregion, i, 0); return; @@ -716,8 +729,9 @@ blind_set: i = 0; list_for_each_entry(connector, &dev->mode_config.connector_list, head) { int output_type = ACPI_OTHER_OUTPUT; - if (i >= 8) { - DRM_DEBUG_KMS("More than 8 outputs in connector list\n"); + if (i >= max_outputs) { + DRM_DEBUG_KMS("More than %u outputs in connector list\n", + max_outputs); return; } switch (connector->connector_type) { |