drm/i915: Only mark the ctx as initialised after a SET_CONTEXT operation

Fallout from

commit 46470fc932ac8a0e8317a220b3f4ea4ed903338e
Author: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Date:   Wed May 21 19:01:06 2014 +0300

    drm/i915: Add null state batch to active list

undid the earlier fix of only marking the ctx as initialised after it is
saved by the hardware during a SET_CONTEXT operation:

commit ad1d219974a3d13412268525309c5892f6779ae9
Author: Ben Widawsky <benjamin.widawsky@intel.com>
Date:   Sat Dec 28 13:31:49 2013 -0800

    drm/i915: set ctx->initialized only after RCS

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Damien Lespiau <damien.lespiau@intel.com>
Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Cc: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
[Jani: add reference to the earlier fix in the commit messsage.]
Signed-off-by: Jani Nikula <jani.nikula@intel.com>

1 files changed, 5 insertions, 3 deletions

diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c
index 3ffe308d5893..a5ddf3bce9c3 100644
--- a/drivers/gpu/drm/i915/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/i915_gem_context.c
@@ -598,6 +598,7 @@ static int do_switch(struct intel_engine_cs *ring,
         struct intel_context *from = ring->last_context;
         struct i915_hw_ppgtt *ppgtt = ctx_to_ppgtt(to);
         u32 hw_flags = 0;
+        bool uninitialized = false;
         int ret, i;
 
         if (from != NULL && ring == &dev_priv->ring[RCS]) {
@@ -696,19 +697,20 @@ static int do_switch(struct intel_engine_cs *ring,
                 i915_gem_context_unreference(from);
         }
 
+        uninitialized = !to->is_initialized && from == NULL;
+        to->is_initialized = true;
+
 done:
         i915_gem_context_reference(to);
         ring->last_context = to;
         to->last_ring = ring;
 
-        if (ring->id == RCS && !to->is_initialized && from == NULL) {
+        if (uninitialized) {
                 ret = i915_gem_render_state_init(ring);
                 if (ret)
                         DRM_ERROR("init render state: %d\n", ret);
         }
 
-        to->is_initialized = true;
-
         return 0;
 
 unpin_out: