diff options
Diffstat (limited to 'drivers/gpu/drm/drm_edid.c')
-rw-r--r-- | drivers/gpu/drm/drm_edid.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index 813ce00a106a..941f3d53a701 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -2845,6 +2845,35 @@ struct edid *drm_get_edid_switcheroo(struct drm_connector *connector, EXPORT_SYMBOL(drm_get_edid_switcheroo); /** + * drm_edid_read_switcheroo - get EDID data for a vga_switcheroo output + * @connector: connector we're probing + * @adapter: I2C adapter to use for DDC + * + * Wrapper around drm_edid_read_ddc() for laptops with dual GPUs using one set + * of outputs. The wrapper adds the requisite vga_switcheroo calls to + * temporarily switch DDC to the GPU which is retrieving EDID. + * + * Return: Pointer to valid EDID or %NULL if we couldn't find any. + */ +const struct drm_edid *drm_edid_read_switcheroo(struct drm_connector *connector, + struct i2c_adapter *adapter) +{ + struct drm_device *dev = connector->dev; + struct pci_dev *pdev = to_pci_dev(dev->dev); + const struct drm_edid *drm_edid; + + if (drm_WARN_ON_ONCE(dev, !dev_is_pci(dev->dev))) + return NULL; + + vga_switcheroo_lock_ddc(pdev); + drm_edid = drm_edid_read_ddc(connector, adapter); + vga_switcheroo_unlock_ddc(pdev); + + return drm_edid; +} +EXPORT_SYMBOL(drm_edid_read_switcheroo); + +/** * drm_edid_duplicate - duplicate an EDID and the extensions * @edid: EDID to duplicate * |