[src/trunk]: src/sys/external/bsd/drm2/i915drm Tweak i915 framebuffer attachm...

[riastradh <riastradh%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/927e3ce4f059
branches:  trunk
changeset: 795233:927e3ce4f059
user:      riastradh <riastradh%NetBSD.org@localhost>
date:      Fri Apr 04 16:02:34 2014 +0000

description:
Tweak i915 framebuffer attachment in preparation for detach/reconfig.

Can't do this yet because genfb can't detach or reconfigure...

diffstat:

 sys/external/bsd/drm2/i915drm/i915_pci.c |  45 +++++++++++++++++++------------
 1 files changed, 28 insertions(+), 17 deletions(-)

diffs (97 lines):

diff -r cd2065d3a60f -r 927e3ce4f059 sys/external/bsd/drm2/i915drm/i915_pci.c
--- a/sys/external/bsd/drm2/i915drm/i915_pci.c  Fri Apr 04 15:16:59 2014 +0000
+++ b/sys/external/bsd/drm2/i915drm/i915_pci.c  Fri Apr 04 16:02:34 2014 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: i915_pci.c,v 1.4 2014/04/03 19:18:29 riastradh Exp $   */
+/*     $NetBSD: i915_pci.c,v 1.5 2014/04/04 16:02:34 riastradh Exp $   */
 
 /*-
  * Copyright (c) 2013 The NetBSD Foundation, Inc.
@@ -30,7 +30,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: i915_pci.c,v 1.4 2014/04/03 19:18:29 riastradh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: i915_pci.c,v 1.5 2014/04/04 16:02:34 riastradh Exp $");
 
 #include <sys/types.h>
 #ifndef _MODULE
@@ -248,6 +248,7 @@
 
        INIT_LIST_HEAD(&sc->sc_fb_list);
 
+       KASSERT(dev_priv->fbdev == NULL);
        dev_priv->fbdev = kmem_zalloc(sizeof(*dev_priv->fbdev), KM_SLEEP);
 
        struct drm_fb_helper *const fb_helper = &dev_priv->fbdev->helper;
@@ -267,6 +268,8 @@
        /* Success!  */
        return;
 
+fail1: __unused
+       drm_fb_helper_fini(fb_helper);
 fail0: kmem_free(dev_priv->fbdev, sizeof(*dev_priv->fbdev));
        dev_priv->fbdev = NULL;
 }
@@ -282,21 +285,9 @@
        if (fbdev != NULL) {
                struct drm_fb_helper *const fb_helper = &fbdev->helper;
 
-               if (fb_helper->fb != NULL) {
-                       struct drm_i915_gem_object *const obj = sc->sc_fb_obj;
-
-                       /*
-                        * genfb children have already been detached,
-                        * so all we need do is unmap the space and
-                        * clean up the drm structures.
-                        */
-                       bus_space_unmap(dev->bst, sc->sc_fb_bsh,
-                           obj->base.size);
-                       drm_framebuffer_unreference(fb_helper->fb);
-                       fb_helper->fb = NULL;
-                       drm_gem_object_unreference_unlocked(&obj->base);
-                       sc->sc_fb_obj = NULL;
-               }
+               if (fb_helper->fb != NULL)
+                       i915drm_fb_detach(fb_helper);
+               KASSERT(fb_helper->fb == NULL);
 
                KASSERT(sc->sc_fb_obj == NULL);
                drm_fb_helper_fini(fb_helper);
@@ -336,9 +327,13 @@
            sizes->surface_depth);
 
        if (fb_helper->fb != NULL) {
+#if notyet                     /* XXX genfb detach */
+               i915drm_fb_detach(fb_helper);
+#else
                aprint_debug_dev(sc->sc_dev, "already have a framebuffer"
                    ": %p\n", fb_helper->fb);
                return 0;
+#endif
        }
 
        /*
@@ -453,6 +448,22 @@
 }
 
 static void
+i915drm_fb_detach(struct drm_fb_helper *fb_helper)
+{
+       struct drm_device *const dev = fb_helper->dev;
+       struct i915drm_softc *const sc = container_of(dev,
+           struct i915drm_softc, sc_drm_dev);
+       struct drm_i915_gem_object *const obj = sc->sc_fb_obj;
+
+       /* XXX How to detach genfb?  */
+       bus_space_unmap(dev->bst, sc->sc_fb_bsh, obj->base.size);
+       drm_framebuffer_unreference(fb_helper->fb);
+       fb_helper->fb = NULL;
+       drm_gem_object_unreference_unlocked(&obj->base);
+       sc->sc_fb_obj = NULL;
+}
+
+static void
 i915drm_fb_destroy(struct drm_framebuffer *fb)
 {