On Tue, Jan 28, 2014 at 06:17:00PM +0100, Daniel Vetter wrote:
> On Wed, Jan 8, 2014 at 7:43 PM, Ville Syrjälä
> <ville.syrj...@linux.intel.com> wrote:
> >
> > The log looks fairly clear to me:
> >
> > 1. initially panel fitter is enabled on pipe B, and pipe B is outputting
> > to LVDS and VGA. Border is enabled.
> > 2. pipe A gets enabled outputting to LVDS. This will overwrite the
> > LVDS border bits
> > 3. pipe B is still active so we do the state check, but as the LVDS
> > border bits have been clobbered earlier, the state checker gets
> > angry
>
> Meh, I've been fairly dense the entire time. This is indeed the
> root-cause, with the twist that we're allowing the impossible:
> Essentially we take away the panel fitter from pipe B to pipe A while
> it is strictly still in use by pipe B for VGA. Currently no idea how
> to properly fix this in a not too intrusive way.
>
> The other issue is that the encoders connected to pipe B change in the
> first modeset, but that's not reflected in the pipe masks.
I think I need a bit more debug output first. Can you please apply the
below patch to drm-intel-nightly and then grab a drm.debug=0xe dmesg from
boot?
Thanks, Daniel
diff --git a/drivers/gpu/drm/i915/intel_display.c
b/drivers/gpu/drm/i915/intel_display.c
index 122f87155b8e..554c30e89308 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -9144,6 +9144,11 @@ intel_modeset_affected_pipes(struct drm_crtc *crtc,
unsigned *modeset_pipes,
if (connector->new_encoder)
*prepare_pipes |=
1 << connector->new_encoder->new_crtc->pipe;
+
+ DRM_DEBUG_KMS("[CONNECTOR:%d:%s]: prepare_pipes %u\n",
+ connector->base.base.id,
+ drm_get_connector_name(&connector->base),
+ *prepare_pipes);
}
list_for_each_entry(encoder, &dev->mode_config.encoder_list,
@@ -9159,6 +9164,11 @@ intel_modeset_affected_pipes(struct drm_crtc *crtc,
unsigned *modeset_pipes,
if (encoder->new_crtc)
*prepare_pipes |= 1 << encoder->new_crtc->pipe;
+
+ DRM_DEBUG_KMS("[ENCODER:%d:%s]: prepare_pipes %u\n",
+ encoder->base.base.id,
+ drm_get_encoder_name(&encoder->base),
+ *prepare_pipes);
}
/* Check for pipes that will be enabled/disabled ... */
@@ -9171,6 +9181,11 @@ intel_modeset_affected_pipes(struct drm_crtc *crtc,
unsigned *modeset_pipes,
*disable_pipes |= 1 << intel_crtc->pipe;
else
*prepare_pipes |= 1 << intel_crtc->pipe;
+
+ DRM_DEBUG_KMS("[CRTC:%d:%s]: prepare_pipes %u\n",
+ intel_crtc->base.base.id,
+ pipe_name(intel_crtc->pipe),
+ *prepare_pipes);
}
--
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch
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