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drm/amdgpu: move non-DC vblank handling out of irq code

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Move it into the DCE code for each generation. This avoids
confusion with the different display paths.

v2: no need for a hotplug worker for vkms

Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher
2022-07-19 13:15:40 -04:00
parent 25263da376
commit a347ca9720
8 changed files with 95 additions and 57 deletions
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35
drivers/gpu/drm/amd/amdgpu/amdgpu_display.c
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@@ -44,6 +44,41 @@
#include <drm/drm_fourcc.h>
#include <drm/drm_vblank.h>
/**
* amdgpu_display_hotplug_work_func - work handler for display hotplug event
*
* @work: work struct pointer
*
* This is the hotplug event work handler (all ASICs).
* The work gets scheduled from the IRQ handler if there
* was a hotplug interrupt. It walks through the connector table
* and calls hotplug handler for each connector. After this, it sends
* a DRM hotplug event to alert userspace.
*
* This design approach is required in order to defer hotplug event handling
* from the IRQ handler to a work handler because hotplug handler has to use
* mutexes which cannot be locked in an IRQ handler (since &mutex_lock may
* sleep).
*/
void amdgpu_display_hotplug_work_func(struct work_struct *work)
{
struct amdgpu_device *adev = container_of(work, struct amdgpu_device,
hotplug_work);
struct drm_device *dev = adev_to_drm(adev);
struct drm_mode_config *mode_config = &dev->mode_config;
struct drm_connector *connector;
struct drm_connector_list_iter iter;
mutex_lock(&mode_config->mutex);
drm_connector_list_iter_begin(dev, &iter);
drm_for_each_connector_iter(connector, &iter)
amdgpu_connector_hotplug(connector);
drm_connector_list_iter_end(&iter);
mutex_unlock(&mode_config->mutex);
/* Just fire off a uevent and let userspace tell us what to do */
drm_helper_hpd_irq_event(dev);
}
static int amdgpu_display_framebuffer_init(struct drm_device *dev,
struct amdgpu_framebuffer *rfb,
const struct drm_mode_fb_cmd2 *mode_cmd,