Touching the VGA resources on an IVB EFI machine causes hard hangs when
we then kick out the efifb. Ouch.
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/i915_dma.c | 29 +++++++++++++++++++++++++++++
drivers/video/console/dummycon.c | 1 +
2 files changed, 30 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index 6de3a43e3acf..837d1a69ca52 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -36,6 +36,8 @@
#include "i915_drv.h"
#include "i915_trace.h"
#include <linux/pci.h>
+#include <linux/console.h>
+#include <linux/vt.h>
#include <linux/vgaarb.h>
#include <linux/acpi.h>
#include <linux/pnp.h>
@@ -1444,6 +1446,27 @@ static int i915_kick_out_firmware_fb(struct drm_i915_private *dev_priv)
}
#endif
+static int i915_kick_out_vgacon(struct drm_i915_private *dev_priv)
+{
+ int ret;
+
+#if !defined(CONFIG_VGA_CONSOLE)
+ return 0;
+#endif
+
+#if !defined(CONFIG_DUMMY_CONSOLE)
+ return -ENODEV;
+#endif
+
+ DRM_INFO("Replacing VGA console driver\n");
+
+ console_lock();
+ ret = do_take_over_console(&dummy_con, 0, MAX_NR_CONSOLES - 1, 1);
+ console_unlock();
+
+ return ret;
+}
+
static void i915_dump_device_info(struct drm_i915_private *dev_priv)
{
const struct intel_device_info *info = dev_priv->info;
@@ -1557,6 +1580,12 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags)
goto out_regs;
if (drm_core_check_feature(dev, DRIVER_MODESET)) {
+ ret = i915_kick_out_vgacon(dev_priv);
+ if (ret) {
+ DRM_ERROR("failed to remove conflicting VGA console\n");
+ goto out_gtt;
+ }
+
ret = i915_kick_out_firmware_fb(dev_priv);
if (ret) {
DRM_ERROR("failed to remove conflicting framebuffer drivers\n");
diff --git a/drivers/video/console/dummycon.c b/drivers/video/console/dummycon.c
index b63860f7beab..40bec8d64b0a 100644
--- a/drivers/video/console/dummycon.c
+++ b/drivers/video/console/dummycon.c
@@ -77,3 +77,4 @@ const struct consw dummy_con = {
.con_set_palette = DUMMY,
.con_scrolldelta = DUMMY,
};
+EXPORT_SYMBOL_GPL(dummy_con);
--
1.8.5.1
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