Re: [Intel-gfx] [git pull] drm fixes

[Daniel Vetter <daniel@ffwll.ch>]

On Wed, Mar 25, 2015 at 09:11:17AM -0400, Josh Boyer wrote:
> On Wed, Mar 25, 2015 at 4:54 AM, Daniel Vetter <daniel@ffwll.ch> wrote:
> >> >> commit f55548b5af87ebfc586ca75748947f1c1b1a4a52
> >> >> Author: Damien Lespiau <damien.lespiau@intel.com>
> >> >> Date:   Thu Feb 5 18:30:20 2015 +0000
> >> >>
> >> >>     drm/i915: Don't try to reference the fb in get_initial_plane_config()
> >> >>
> >> >> From linux-next?
> >> >
> >> > Yes, building now.  Will let you know as soon as I test it on both machines.
> >>
> >> OK, with that commit applied I no longer get the kref.h splat and the
> >> NUC machine boots headless.  I still see the backtrace below on both
> >> the NUC and the macbook.  I have a copy of it with drm.debug=0xff from
> >> the NUC here:
> >>
> >> https://jwboyer.fedorapeople.org/pub/nuc-drm-debug-ff-with-fixes.txt
> >>
> >> Getting better at least :).
> >
> > On top of what you currently have please also cherry-pick
> >
> > commit fb9981aa675eb7b398849915364916fd98833cfa
> > Author: Damien Lespiau <damien.lespiau@intel.com>
> > Date:   Thu Feb 5 19:24:25 2015 +0000
> >
> >     drm/i915: Fix atomic state when reusing the firmware fb
> >
> > from -next. Let's hope this terminates eventually ;-)
> 
> Hm.  That one doesn't apply cleanly.  I think because it needs:
> 
> From 2d14030b1a9d0e89cfdca6f16851e2eac8cb4de0 Mon Sep 17 00:00:00 2001
> From: Damien Lespiau <damien.lespiau@intel.com>
> Date: Thu, 5 Feb 2015 17:22:18 +0000
> Subject: drm/i915: Store the initial framebuffer in initial_plane_config
> 
> first.  Do you want me to grab both, or should I try and figure out
> how to backport fb9981aa67 without it?

Oops missed that. The active ingredient is setting crtc->primary->state->crtc like this:
-Daniel


diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 1c12262029fb..bfc14a6046ea 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -2439,6 +2439,7 @@ intel_find_plane_obj(struct intel_crtc *intel_crtc,
 		return;
 
 	if (intel_alloc_plane_obj(intel_crtc, plane_config)) {
+		intel_crtc->base.primary->state->crtc = &intel_crtc->base;
 		update_state_fb(intel_crtc->base.primary);
 		return;
 	}
@@ -2469,6 +2470,7 @@ intel_find_plane_obj(struct intel_crtc *intel_crtc,
 
 			drm_framebuffer_reference(c->primary->fb);
 			intel_crtc->base.primary->fb = c->primary->fb;
+			intel_crtc->base.primary->state->crtc = &intel_crtc->base;
 			obj->frontbuffer_bits |= INTEL_FRONTBUFFER_PRIMARY(intel_crtc->pipe);
 			break;
 		}
-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch