[Intel-gfx] [PATCH] drm/i915: Use the same pte_encoding for ppgtt as for gtt

[Chris Wilson]

The PTE layouts are the same for both ppgtt and gtt, so we can simplify
the setup for ppgtt by copying the encoding function pointer from gtt.
This prevents bugs where we update one function pointer, but forget the
other.

For instance,

commit 4d15c145a6234d999c0452eec0d275c1fbf0688c
Author: Ben Widawsky <ben at bwidawsk.net>
Date:   Thu Jul 4 11:02:06 2013 -0700

    drm/i915: Use eLLC/LLC by default when available

only extends the gtt to use eLLC/LLC cacheing and forgets to also update
the ppgtt function pointer.

v2: Actually mention the bug being fixed (Kenneth)

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Ben Widawsky <ben at bwidawsk.net>
Reviewed-by: Kenneth Graunke <kenneth at whitecape.org>
---
 drivers/gpu/drm/i915/i915_gem_gtt.c | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index 1294cee..0522d00 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -298,13 +298,7 @@ static int gen6_ppgtt_init(struct i915_hw_ppgtt *ppgtt)
 	 * now. */
 	first_pd_entry_in_global_pt = gtt_total_entries(dev_priv->gtt);
 
-	if (IS_HASWELL(dev)) {
-		ppgtt->base.pte_encode = hsw_pte_encode;
-	} else if (IS_VALLEYVIEW(dev)) {
-		ppgtt->base.pte_encode = byt_pte_encode;
-	} else {
-		ppgtt->base.pte_encode = gen6_pte_encode;
-	}
+	ppgtt->base.pte_encode = dev_priv->gtt.base.pte_encode;
 	ppgtt->num_pd_entries = GEN6_PPGTT_PD_ENTRIES;
 	ppgtt->enable = gen6_ppgtt_enable;
 	ppgtt->base.clear_range = gen6_ppgtt_clear_range;
-- 
1.8.3.2