drm/i915: Disable all outputs early, before KMS takeover
If the outputs are active and continuing to access the GATT when we
teardown the PTEs, then there is a potential for us to hang the GPU.
The hang tends to be a PGTBL_ER with either an invalid host access or
an invalid display plane fetch.
v2: Reorder IRQ initialisation to defer until after GEM is setup.
Reported-by: Pekka Enberg <penberg@kernel.org>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Tested-by: Daniel Vetter <daniel.vetter@ffwll.ch> (855GM)
Tested-by: Pekka Enberg <penberg@kernel.org>
# note that this doesn't fix the underlying problem of the
PGTBL_ER and pipe underruns being reported immediately upon
init on his 965GM MacBook
Reported-and-tested-by: Rick Bramley <richard.bramley@hp.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=35635
Reported-and-tested-by: Zdenek Kabelac <zdenek.kabelac@gmail.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=36048
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index e99ae3b..a38fb39 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -6627,6 +6627,9 @@
}
intel_panel_setup_backlight(dev);
+
+ /* disable all the possible outputs/crtcs before entering KMS mode */
+ drm_helper_disable_unused_functions(dev);
}
static void intel_user_framebuffer_destroy(struct drm_framebuffer *fb)
@@ -7573,13 +7576,12 @@
intel_crtc_init(dev, i);
}
+ /* Just disable it once at startup */
+ i915_disable_vga(dev);
intel_setup_outputs(dev);
intel_enable_clock_gating(dev);
- /* Just disable it once at startup */
- i915_disable_vga(dev);
-
if (IS_IRONLAKE_M(dev)) {
ironlake_enable_drps(dev);
intel_init_emon(dev);
@@ -7588,12 +7590,15 @@
if (IS_GEN6(dev))
gen6_enable_rps(dev_priv);
- if (IS_IRONLAKE_M(dev))
- ironlake_enable_rc6(dev);
-
INIT_WORK(&dev_priv->idle_work, intel_idle_update);
setup_timer(&dev_priv->idle_timer, intel_gpu_idle_timer,
(unsigned long)dev);
+}
+
+void intel_modeset_gem_init(struct drm_device *dev)
+{
+ if (IS_IRONLAKE_M(dev))
+ ironlake_enable_rc6(dev);
intel_setup_overlay(dev);
}