diff options
Diffstat (limited to 'include/uapi')
| -rw-r--r-- | include/uapi/linux/vfio.h | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h index f378b9802d8b..813102810f53 100644 --- a/include/uapi/linux/vfio.h +++ b/include/uapi/linux/vfio.h @@ -303,6 +303,56 @@ struct vfio_region_info_cap_type { #define VFIO_REGION_SUBTYPE_INTEL_IGD_HOST_CFG (2) #define VFIO_REGION_SUBTYPE_INTEL_IGD_LPC_CFG (3) +#define VFIO_REGION_TYPE_GFX (1) +#define VFIO_REGION_SUBTYPE_GFX_EDID (1) + +/** + * struct vfio_region_gfx_edid - EDID region layout. + * + * Set display link state and EDID blob. + * + * The EDID blob has monitor information such as brand, name, serial + * number, physical size, supported video modes and more. + * + * This special region allows userspace (typically qemu) set a virtual + * EDID for the virtual monitor, which allows a flexible display + * configuration. + * + * For the edid blob spec look here: + * https://en.wikipedia.org/wiki/Extended_Display_Identification_Data + * + * On linux systems you can find the EDID blob in sysfs: + * /sys/class/drm/${card}/${connector}/edid + * + * You can use the edid-decode ulility (comes with xorg-x11-utils) to + * decode the EDID blob. + * + * @edid_offset: location of the edid blob, relative to the + * start of the region (readonly). + * @edid_max_size: max size of the edid blob (readonly). + * @edid_size: actual edid size (read/write). + * @link_state: display link state (read/write). + * VFIO_DEVICE_GFX_LINK_STATE_UP: Monitor is turned on. + * VFIO_DEVICE_GFX_LINK_STATE_DOWN: Monitor is turned off. + * @max_xres: max display width (0 == no limitation, readonly). + * @max_yres: max display height (0 == no limitation, readonly). + * + * EDID update protocol: + * (1) set link-state to down. + * (2) update edid blob and size. + * (3) set link-state to up. + */ +struct vfio_region_gfx_edid { + __u32 edid_offset; + __u32 edid_max_size; + __u32 edid_size; + __u32 max_xres; + __u32 max_yres; + __u32 link_state; +#define VFIO_DEVICE_GFX_LINK_STATE_UP 1 +#define VFIO_DEVICE_GFX_LINK_STATE_DOWN 2 +}; + /* * The MSIX mappable capability informs that MSIX data of a BAR can be mmapped * which allows direct access to non-MSIX registers which happened to be within |