[PATCH 06/10] drm/i915: Implement vga_switcheroo_client_ops.pre_switch

[Thomas Zimmermann <tzimmermann@suse.de>]

Call drm_client_dev_acquire_outputs() from vga_switcheroo's pre_switch
callback. Pushes fbcon updates from vga_switcheroo into DRM's fbdev
emulation.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
---
 drivers/gpu/drm/i915/i915_switcheroo.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_switcheroo.c b/drivers/gpu/drm/i915/i915_switcheroo.c
index 7e0791024282..6b306ece0556 100644
--- a/drivers/gpu/drm/i915/i915_switcheroo.c
+++ b/drivers/gpu/drm/i915/i915_switcheroo.c
@@ -5,6 +5,7 @@
 
 #include <linux/vga_switcheroo.h>
 
+#include <drm/drm_client_event.h>
 #include <drm/drm_print.h>
 
 #include "display/intel_display_device.h"
@@ -58,10 +59,19 @@ static bool i915_switcheroo_can_switch(struct pci_dev *pdev)
 		atomic_read(&i915->drm.open_count) == 0;
 }
 
+static void i915_switcheroo_pre_switch(struct pci_dev *pdev)
+{
+	struct drm_i915_private *i915 = pdev_to_i915(pdev);
+
+	if (i915 && intel_display_device_present(i915->display))
+		drm_client_dev_acquire_outputs(&i915->drm);
+}
+
 static const struct vga_switcheroo_client_ops i915_switcheroo_ops = {
 	.set_gpu_state = i915_switcheroo_set_state,
 	.reprobe = NULL,
 	.can_switch = i915_switcheroo_can_switch,
+	.pre_switch = i915_switcheroo_pre_switch,
 };
 
 int i915_switcheroo_register(struct drm_i915_private *i915)
-- 
2.54.0