patches.baytrail/0406-drm-i915-Really-share-scratch-page.patch

From aec87ca35c93140954c4e82732fa016686bc3f9e Mon Sep 17 00:00:00 2001
From: Ben Widawsky <ben@bwidawsk.net>
Date: Thu, 27 Jun 2013 16:30:17 -0700
Subject: drm/i915: Really share scratch page

A previous patch had set up the ppgtt and ggtt to use the same scratch
page, but still kept around both pointers. Kill it, it's not needed and
gets in our way for upcoming cleanups.

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
(cherry picked from commit 84f135605898708ab692fc84555c31fbfe2983c1)
(cherry picked from drm-intel-next-queued)
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
---
 drivers/gpu/drm/i915/i915_drv.h     | 1 -
 drivers/gpu/drm/i915/i915_gem_gtt.c | 4 ++--
 2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index c38084df3313..cba5dec686c9 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -492,7 +492,6 @@ struct i915_hw_ppgtt {
 	struct page **pt_pages;
 	uint32_t pd_offset;
 	dma_addr_t *pt_dma_addr;
-	dma_addr_t scratch_page_dma_addr;
 
 	/* pte functions, mirroring the interface of the global gtt. */
 	void (*clear_range)(struct i915_hw_ppgtt *ppgtt,
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index 216e7a19e63d..46b9e32b1109 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -188,13 +188,14 @@ static void gen6_ppgtt_clear_range(struct i915_hw_ppgtt *ppgtt,
 				   unsigned first_entry,
 				   unsigned num_entries)
 {
+	struct drm_i915_private *dev_priv = ppgtt->dev->dev_private;
 	gen6_gtt_pte_t *pt_vaddr, scratch_pte;
 	unsigned act_pt = first_entry / I915_PPGTT_PT_ENTRIES;
 	unsigned first_pte = first_entry % I915_PPGTT_PT_ENTRIES;
 	unsigned last_pte, i;
 
 	scratch_pte = ppgtt->pte_encode(ppgtt->dev,
-					ppgtt->scratch_page_dma_addr,
+					dev_priv->gtt.scratch_page_dma,
 					I915_CACHE_LLC);
 
 	while (num_entries) {
@@ -351,7 +352,6 @@ static int i915_gem_init_aliasing_ppgtt(struct drm_device *dev)
 		return -ENOMEM;
 
 	ppgtt->dev = dev;
-	ppgtt->scratch_page_dma_addr = dev_priv->gtt.scratch_page_dma;
 
 	if (INTEL_INFO(dev)->gen < 8)
 		ret = gen6_ppgtt_init(ppgtt);
-- 
1.8.5.rc3