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drm/amdgpu/atif: Send a hotplug event when we get dgpu display request

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On PX systems, if the platform supports hotplug events ATIF while the
dGPU is powered down, handle the event and alert userspace.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2016-09-14 14:04:29 -04:00
parent efc83cf423
commit 1b0f568d24
1 changed files with 11 additions and 0 deletions
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11
drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c
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@ -25,6 +25,7 @@
#include <linux/acpi.h>
#include <linux/slab.h>
#include <linux/power_supply.h>
#include <linux/pm_runtime.h>
#include <acpi/video.h>
#include <drm/drmP.h>
#include <drm/drm_crtc_helper.h>
@ -333,6 +334,16 @@ int amdgpu_atif_handler(struct amdgpu_device *adev,
#endif
}
}
if (req.pending & ATIF_DGPU_DISPLAY_EVENT) {
if ((adev->flags & AMD_IS_PX) &&
amdgpu_atpx_dgpu_req_power_for_displays()) {
pm_runtime_get_sync(adev->ddev->dev);
/* Just fire off a uevent and let userspace tell us what to do */
drm_helper_hpd_irq_event(adev->ddev);
pm_runtime_mark_last_busy(adev->ddev->dev);
pm_runtime_put_autosuspend(adev->ddev->dev);
}
}
/* TODO: check other events */
/* We've handled the event, stop the notifier chain. The ACPI interface