| commit | 98b3a3402eb6e38c3bf5dd4281e60e1f186f0041 | [log] [tgz] |
|---|---|---|
| author | Lukas Wunner <lukas@wunner.de> | Mon Jan 11 20:09:20 2016 +0100 |
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | Tue Feb 09 11:21:12 2016 +0100 |
| tree | 004f9b16321a3b70651fc6f5fdcbb764aee3eea3 | |
| parent | 704ab614ec1201138032003c03113a81526638ab [diff] |
drm/nouveau: Defer probe if gmux is present but its driver isn't gmux is a microcontroller built into dual GPU MacBook Pros. On pre-retina MBPs, if we're the inactive GPU, we need apple-gmux to temporarily switch DDC so that we can probe the panel's EDID. The checks for CONFIG_VGA_ARB and CONFIG_VGA_SWITCHEROO are necessary because if either of them is disabled but gmux is present, the driver would never load, even if we're the active GPU. (vga_default_device() would evaluate to NULL and vga_switcheroo_handler_flags() would evaluate to 0.) Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=88861 Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=61115 Tested-by: Lukas Wunner <lukas@wunner.de> [MBP 9,1 2012 intel IVB + nvidia GK107 pre-retina 15"] Signed-off-by: Lukas Wunner <lukas@wunner.de> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/d9542ca5041178165d3ff286c90cc99634f7d2ce.1452525860.git.lukas@wunner.de