Hans de Goede 3a6536c51d drm/nouveau: Intercept ACPI_VIDEO_NOTIFY_PROBE ... Various notebooks with nvidia GPUs generate an ACPI_VIDEO_NOTIFY_PROBE acpi-video event when an external device gets plugged in (and again on modesets on that connector), the default behavior in the acpi-video driver for this is to send a KEY_SWITCHVIDEOMODE evdev event, which causes e.g. gnome-settings-daemon to ask us to rescan the connectors (good), but also causes g-s-d to switch to mirror mode on a newly plugged monitor rather then using the monitor to extend the desktop (bad) as KEY_SWITCHVIDEOMODE is supposed to switch between extend the desktop vs mirror mode. More troublesome are the repeated ACPI_VIDEO_NOTIFY_PROBE events on changing the mode on the connector, which cause g-s-d to switch between mirror/extend mode, which causes a new ACPI_VIDEO_NOTIFY_PROBE event and we end up with an endless loop. This commit fixes this by adding an acpi notifier block handler to nouveau_display.c to intercept ACPI_VIDEO_NOTIFY_PROBE and: 1) Wake-up runtime suspended GPUs and call drm_helper_hpd_irq_event() on them, this is necessary in some cases for the GPU to detect connector hotplug events while runtime suspended 2) Return NOTIFY_BAD to stop acpi-video from emitting a bogus KEY_SWITCHVIDEOMODE key-press event There already is another acpi notifier block handler registered in drivers/gpu/drm/nouveau/nvkm/engine/device/acpi.c, but that is not suitable since that one gets unregistered on runtime suspend, and we also want to intercept ACPI_VIDEO_NOTIFY_PROBE when runtime suspended. Signed-off-by: Hans de Goede <hdegoede@redhat.com>		2016-11-17 09:50:37 +10:00
..
drm	drm/nouveau: Intercept ACPI_VIDEO_NOTIFY_PROBE	2016-11-17 09:50:37 +10:00
host1x	drm/tegra: dsi: Enhance runtime power management	2016-08-24 15:58:57 +02:00
ipu-v3	Linux 4.9-rc4	2016-11-07 09:37:09 +10:00
vga	drivers/gpu/vga: allocate vga_arb_write() buffer on stack	2016-10-17 08:21:14 +02:00
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