unsupported #] y=am_J*j"TEqTţ"|]/* * vga_switcheroo.h - Support for laptop with dual GPU using one set of outputs * * Copyright (c) 2010 Red Hat Inc. * Author : Dave Airlie * * Copyright (c) 2015 Lukas Wunner * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER * DEALINGS * IN THE SOFTWARE. * */ #ifndef _LINUX_VGA_SWITCHEROO_H_ #define _LINUX_VGA_SWITCHEROO_H_ #include struct pci_dev; /** * enum vga_switcheroo_handler_flags_t - handler flags bitmask * @VGA_SWITCHEROO_CAN_SWITCH_DDC: whether the handler is able to switch the * DDC lines separately. This signals to clients that they should call * drm_get_edid_switcheroo() to probe the EDID * @VGA_SWITCHEROO_NEEDS_EDP_CONFIG: whether the handler is unable to switch * the AUX channel separately. This signals to clients that the active * GPU needs to train the link and communicate the link parameters to the * inactive GPU (mediated by vga_switcheroo). The inactive GPU may then * skip the AUX handshake and set up its output with these pre-calibrated * values (DisplayPort specification v1.1a, section 2.5.3.3) * * Handler flags bitmask. Used by handlers to declare their capabilities upon * registering with vga_switcheroo. */ enum vga_switcheroo_handler_flags_t { VGA_SWITCHEROO_CAN_SWITCH_DDC = (1 << 0), VGA_SWITCHEROO_NEEDS_EDP_CONFIG = (1 << 1), }; /** * enum vga_switcheroo_state - client power state * @VGA_SWITCHEROO_OFF: off * @VGA_SWITCHEROO_ON: on * @VGA_SWITCHEROO_NOT_FOUND: client has not registered with vga_switcheroo. * Only used in vga_switcheroo_get_client_state() which in turn is only * called from hda_intel.c * * Client power state. */ enum vga_switcheroo_state { VGA_SWITCHEROO_OFF, VGA_SWITCHEROO_ON, /* below are referred only from vga_switcheroo_get_client_state() */ VGA_SWITCHEROO_NOT_FOUND, }; /** * enum vga_switcheroo_client_id - client identifier * @VGA_SWITCHEROO_UNKNOWN_ID: initial identifier assigned to vga clients. * Determining the id requires the handler, so GPUs are given their * true id in a delayed fashion in vga_switcheroo_enable() * @VGA_SWITCHEROO_IGD: integrated graphics device * @VGA_SWITCHEROO_DIS: discrete graphics device * @VGA_SWITCHEROO_MAX_CLIENTS: currently no more than two GPUs are supported * * Client identifier. Audio clients use the same identifier & 0x100. */ enum vga_switcheroo_client_id { VGA_SWITCHEROO_UNKNOWN_ID = 0x1000, VGA_SWITCHEROO_IGD = 0, VGA_SWITCHEROO_DIS, VGA_SWITCHEROO_MAX_CLIENTS, }; /** * struct vga_switcheroo_handler - handler callbacks * @init: initialize handler. * Optional. This gets called when vga_switcheroo is enabled, i.e. when * two vga clients have registered. It allows the handler to perform * some delayed initialization that depends on the existence of the * vga clients. Currently only the radeon and amdgpu drivers use this. * The return value is ignored * @switchto: switch outputs to given client. * Mandatory. For muxless machine