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drm/i915: fix pipe source image setting in flip command 

The MI_DISPLAY_FLIP command needs to be set the same pipe
source image like in pipe source register, e.g source image
size minus one. This fixes screen corrupt issue on Ironlake.

Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Zhenyu Wang 2010-02-09 09:46:20 +08:00 committed by Eric Anholt
parent f072d2e771
commit aacef09b59
1 changed files with 4 additions and 2 deletions
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6
drivers/gpu/drm/i915/intel_display.c
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@ -4180,7 +4180,8 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc,
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
struct intel_unpin_work *work;
unsigned long flags;
int ret;
int pipesrc_reg = (intel_crtc->pipe == 0) ? PIPEASRC : PIPEBSRC;
int ret, pipesrc;
RING_LOCALS;
work = kzalloc(sizeof *work, GFP_KERNEL);
@ -4236,7 +4237,8 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc,
OUT_RING(fb->pitch);
if (IS_I965G(dev)) {
OUT_RING(obj_priv->gtt_offset | obj_priv->tiling_mode);
OUT_RING((fb->width << 16) | fb->height);
pipesrc = I915_READ(pipesrc_reg);
OUT_RING(pipesrc & 0x0fff0fff);
} else {
OUT_RING(obj_priv->gtt_offset);
OUT_RING(MI_NOOP);