diff options
Diffstat (limited to 'drivers/gpu/drm/i915/i915_opregion.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_opregion.c | 54 |
1 files changed, 50 insertions, 4 deletions
diff --git a/drivers/gpu/drm/i915/i915_opregion.c b/drivers/gpu/drm/i915/i915_opregion.c index 7cc8410239cb..8fcc75c1aa28 100644 --- a/drivers/gpu/drm/i915/i915_opregion.c +++ b/drivers/gpu/drm/i915/i915_opregion.c @@ -382,8 +382,57 @@ static void intel_didl_outputs(struct drm_device *dev) struct drm_i915_private *dev_priv = dev->dev_private; struct intel_opregion *opregion = &dev_priv->opregion; struct drm_connector *connector; + acpi_handle handle; + struct acpi_device *acpi_dev, *acpi_cdev, *acpi_video_bus = NULL; + unsigned long long device_id; + acpi_status status; int i = 0; + handle = DEVICE_ACPI_HANDLE(&dev->pdev->dev); + if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &acpi_dev))) + return; + + if (acpi_is_video_device(acpi_dev)) + acpi_video_bus = acpi_dev; + else { + list_for_each_entry(acpi_cdev, &acpi_dev->children, node) { + if (acpi_is_video_device(acpi_cdev)) { + acpi_video_bus = acpi_cdev; + break; + } + } + } + + if (!acpi_video_bus) { + printk(KERN_WARNING "No ACPI video bus found\n"); + return; + } + + list_for_each_entry(acpi_cdev, &acpi_video_bus->children, node) { + if (i >= 8) { + dev_printk (KERN_ERR, &dev->pdev->dev, + "More than 8 outputs detected\n"); + return; + } + status = + acpi_evaluate_integer(acpi_cdev->handle, "_ADR", + NULL, &device_id); + if (ACPI_SUCCESS(status)) { + if (!device_id) + goto blind_set; + opregion->acpi->didl[i] = (u32)(device_id & 0x0f0f); + i++; + } + } + +end: + /* If fewer than 8 outputs, the list must be null terminated */ + if (i < 8) + opregion->acpi->didl[i] = 0; + return; + +blind_set: + i = 0; list_for_each_entry(connector, &dev->mode_config.connector_list, head) { int output_type = ACPI_OTHER_OUTPUT; if (i >= 8) { @@ -416,10 +465,7 @@ static void intel_didl_outputs(struct drm_device *dev) opregion->acpi->didl[i] |= (1<<31) | output_type | i; i++; } - - /* If fewer than 8 outputs, the list must be null terminated */ - if (i < 8) - opregion->acpi->didl[i] = 0; + goto end; } int intel_opregion_init(struct drm_device *dev, int resume) |
