| Benjamin Herrenschmidt | deb2d2e | 2009-08-11 15:52:06 +1000 | [diff] [blame] | 1 | config VGA_ARB |
| 2 | bool "VGA Arbitration" if EMBEDDED |
| 3 | default y |
| 4 | depends on PCI |
| 5 | help |
| 6 | Some "legacy" VGA devices implemented on PCI typically have the same |
| 7 | hard-decoded addresses as they did on ISA. When multiple PCI devices |
| 8 | are accessed at same time they need some kind of coordination. Please |
| 9 | see Documentation/vgaarbiter.txt for more details. Select this to |
| 10 | enable VGA arbiter. |
| Mike Travis | 36028f3 | 2010-02-02 17:45:01 -0800 | [diff] [blame] | 11 | |
| 12 | config VGA_ARB_MAX_GPUS |
| 13 | int "Maximum number of GPUs" |
| 14 | default 16 |
| 15 | depends on VGA_ARB |
| 16 | help |
| 17 | Reserves space in the kernel to maintain resource locking for |
| 18 | multiple GPUS. The overhead for each GPU is very small. |
| Linus Torvalds | 03a2c4d | 2010-03-04 07:49:37 -0800 | [diff] [blame] | 19 | |
| Dave Airlie | 6a9ee8a | 2010-02-01 15:38:10 +1000 | [diff] [blame] | 20 | config VGA_SWITCHEROO |
| 21 | bool "Laptop Hybrid Grapics - GPU switching support" |
| Dave Airlie | 6a9ee8a | 2010-02-01 15:38:10 +1000 | [diff] [blame] | 22 | depends on X86 |
| 23 | depends on ACPI |
| 24 | help |
| 25 | Many laptops released in 2008/9/10 have two gpus with a multiplxer |
| 26 | to switch between them. This adds support for dynamic switching when |
| 27 | X isn't running and delayed switching until the next logoff. This |
| 28 | features is called hybrid graphics, ATI PowerXpress, and Nvidia |
| 29 | HybridPower. |