For HP Inc. mobile workstation with hybrid graphics support, dGPU can
directly output to external monitors; however, Nvidia and AMD's Linux
drivers aren't able to support this feature.
The OEM _OSI string "Linux-HPI-Hybrid-Graphics" is used by BIOS to
implement dGPU direct output to external monitors.
The form of the OEM _OSI strings is defined by each OEMs and is
discussed in Documentation/acpi/osi.txt.
BugLink: http://bugs.launchpad.net/bugs/1810702
Signed-off-by: Alex Hung <alex.hung@canonical.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
(cherry picked from commit
28586a51eea666d5531bcaef2f68e4abbd87242c)
Signed-off-by: Alex Hung <alex.hung@canonical.com>
Acked-by: Khalid Elmously <khalid.elmously@canonical.com>
Acked-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Khalid Elmously <khalid.elmously@canonical.com>
* a BIOS workaround.
*/
{"Linux-Lenovo-NV-HDMI-Audio", true},
+ /*
+ * Linux-HPI-Hybrid-Graphics is used by BIOS to enable dGPU to
+ * output video directly to external monitors on HP Inc. mobile
+ * workstations as Nvidia and AMD VGA drivers provide limited
+ * hybrid graphics supports.
+ */
+ {"Linux-HPI-Hybrid-Graphics", true},
};
static u32 acpi_osi_handler(acpi_string interface, u32 supported)