drm/i915: fix tiling on IGDNG
It seems that on IGDNG the same swizzling setup always applys.
And front buffer tiling needs to set address swizzle in display
arb control too.
Fix plane tricle feed setting in v1 which should be disable bit,
and always setup address swizzle to let hardware care for buffer
tiling in all cases.
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
diff --git a/drivers/gpu/drm/i915/i915_gem_tiling.c b/drivers/gpu/drm/i915/i915_gem_tiling.c
index a2d527b..e774a4a 100644
--- a/drivers/gpu/drm/i915/i915_gem_tiling.c
+++ b/drivers/gpu/drm/i915/i915_gem_tiling.c
@@ -234,7 +234,13 @@
uint32_t swizzle_y = I915_BIT_6_SWIZZLE_UNKNOWN;
bool need_disable;
- if (!IS_I9XX(dev)) {
+ if (IS_IGDNG(dev)) {
+ /* On IGDNG whatever DRAM config, GPU always do
+ * same swizzling setup.
+ */
+ swizzle_x = I915_BIT_6_SWIZZLE_9_10;
+ swizzle_y = I915_BIT_6_SWIZZLE_9;
+ } else if (!IS_I9XX(dev)) {
/* As far as we know, the 865 doesn't have these bit 6
* swizzling issues.
*/
@@ -317,13 +323,6 @@
}
}
- /* FIXME: check with memory config on IGDNG */
- if (IS_IGDNG(dev)) {
- DRM_ERROR("disable tiling on IGDNG...\n");
- swizzle_x = I915_BIT_6_SWIZZLE_UNKNOWN;
- swizzle_y = I915_BIT_6_SWIZZLE_UNKNOWN;
- }
-
dev_priv->mm.bit_6_swizzle_x = swizzle_x;
dev_priv->mm.bit_6_swizzle_y = swizzle_y;
}
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 884757c..e38cd21 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -1864,6 +1864,7 @@
#define DISPPLANE_NO_LINE_DOUBLE 0
#define DISPPLANE_STEREO_POLARITY_FIRST 0
#define DISPPLANE_STEREO_POLARITY_SECOND (1<<18)
+#define DISPPLANE_TRICKLE_FEED_DISABLE (1<<14) /* IGDNG */
#define DISPPLANE_TILED (1<<10)
#define DSPAADDR 0x70184
#define DSPASTRIDE 0x70188
@@ -2044,6 +2045,9 @@
#define GTIIR 0x44018
#define GTIER 0x4401c
+#define DISP_ARB_CTL 0x45000
+#define DISP_TILE_SURFACE_SWIZZLING (1<<13)
+
/* PCH */
/* south display engine interrupt */
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 867a969..d7c7fa4 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -1064,6 +1064,10 @@
dspcntr &= ~DISPPLANE_TILED;
}
+ if (IS_IGDNG(dev))
+ /* must disable */
+ dspcntr |= DISPPLANE_TRICKLE_FEED_DISABLE;
+
I915_WRITE(dspcntr_reg, dspcntr);
Start = obj_priv->gtt_offset;
@@ -2719,6 +2723,12 @@
intel_wait_for_vblank(dev);
+ if (IS_IGDNG(dev)) {
+ /* enable address swizzle for tiling buffer */
+ temp = I915_READ(DISP_ARB_CTL);
+ I915_WRITE(DISP_ARB_CTL, temp | DISP_TILE_SURFACE_SWIZZLING);
+ }
+
I915_WRITE(dspcntr_reg, dspcntr);
/* Flush the plane changes */