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authorDave Airlie <airlied@redhat.com>2019-03-14 11:37:31 +1000
committerDave Airlie <airlied@redhat.com>2019-03-14 11:37:46 +1000
commit74cd45fa90a234de92a3f3ce8bdabeb643b546a5 (patch)
tree3a8c874c5ece28e93bc90f13e01fbecdd8eff29c /drivers/gpu/vga
parent3a7d2f4f4427f4b241f8240e370099e2ec1fd307 (diff)
parentc34674a23d1e8674ac532bf3397333f24a41e7b2 (diff)
downloadlinux-74cd45fa90a234de92a3f3ce8bdabeb643b546a5.tar.bz2
Merge tag 'drm-misc-next-fixes-2019-03-13' of git://anongit.freedesktop.org/drm/drm-misc into drm-next
- qxl: Remove the conflicting framebuffers earlier - Split out some i915 code into the fb_helper to allow the above Signed-off-by: Dave Airlie <airlied@redhat.com> From: Maxime Ripard <maxime.ripard@bootlin.com> Link: https://patchwork.freedesktop.org/patch/msgid/20190313192158.k3qssf733khsqodn@flea
Diffstat (limited to 'drivers/gpu/vga')
-rw-r--r--drivers/gpu/vga/vgaarb.c49
1 files changed, 49 insertions, 0 deletions
diff --git a/drivers/gpu/vga/vgaarb.c b/drivers/gpu/vga/vgaarb.c
index dc8e039bfab5..f2f3ef8af271 100644
--- a/drivers/gpu/vga/vgaarb.c
+++ b/drivers/gpu/vga/vgaarb.c
@@ -48,6 +48,8 @@
#include <linux/miscdevice.h>
#include <linux/slab.h>
#include <linux/screen_info.h>
+#include <linux/vt.h>
+#include <linux/console.h>
#include <linux/uaccess.h>
@@ -168,6 +170,53 @@ void vga_set_default_device(struct pci_dev *pdev)
vga_default = pci_dev_get(pdev);
}
+/**
+ * vga_remove_vgacon - deactivete vga console
+ *
+ * Unbind and unregister vgacon in case pdev is the default vga
+ * device. Can be called by gpu drivers on initialization to make
+ * sure vga register access done by vgacon will not disturb the
+ * device.
+ *
+ * @pdev: pci device.
+ */
+#if !defined(CONFIG_VGA_CONSOLE)
+int vga_remove_vgacon(struct pci_dev *pdev)
+{
+ return 0;
+}
+#elif !defined(CONFIG_DUMMY_CONSOLE)
+int vga_remove_vgacon(struct pci_dev *pdev)
+{
+ return -ENODEV;
+}
+#else
+int vga_remove_vgacon(struct pci_dev *pdev)
+{
+ int ret = 0;
+
+ if (pdev != vga_default)
+ return 0;
+ vgaarb_info(&pdev->dev, "deactivate vga console\n");
+
+ console_lock();
+ if (con_is_bound(&vga_con))
+ ret = do_take_over_console(&dummy_con, 0,
+ MAX_NR_CONSOLES - 1, 1);
+ if (ret == 0) {
+ ret = do_unregister_con_driver(&vga_con);
+
+ /* Ignore "already unregistered". */
+ if (ret == -ENODEV)
+ ret = 0;
+ }
+ console_unlock();
+
+ return ret;
+}
+#endif
+EXPORT_SYMBOL(vga_remove_vgacon);
+
static inline void vga_irq_set_state(struct vga_device *vgadev, bool state)
{
if (vgadev->irq_set_state)