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drm/i915: Fix offset page-flips on i965+ 

i965 uses the Display Registers to compute the offset from the display
base so the new base does not need adjusting when flipping. The older
chipsets use a fence to access the display and so do perceive the
surface as linear and have a single base register which is reprogrammed
using the flip.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Reported-by: Marty Jack <martyj19@comcast.net>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Chris Wilson 2010-08-08 10:15:59 +01:00
parent c96c3a8cb7
commit 52e68630d1
1 changed files with 48 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

67
drivers/gpu/drm/i915/intel_display.c
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@ -5042,9 +5042,9 @@ 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, offset;
int pipesrc_reg = (intel_crtc->pipe == 0) ? PIPEASRC : PIPEBSRC;
int ret, pipesrc;
u32 flip_mask;
int pipe = intel_crtc->pipe;
u32 pf, pipesrc;
int ret;
work = kzalloc(sizeof *work, GFP_KERNEL);
if (work == NULL)
@ -5093,12 +5093,14 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc,
atomic_inc(&obj_priv->pending_flip);
work->pending_flip_obj = obj;
if (intel_crtc->plane)
flip_mask = MI_WAIT_FOR_PLANE_B_FLIP;
else
flip_mask = MI_WAIT_FOR_PLANE_A_FLIP;
if (IS_GEN3(dev) || IS_GEN2(dev)) {
u32 flip_mask;
if (intel_crtc->plane)
flip_mask = MI_WAIT_FOR_PLANE_B_FLIP;
else
flip_mask = MI_WAIT_FOR_PLANE_A_FLIP;
BEGIN_LP_RING(2);
OUT_RING(MI_WAIT_FOR_EVENT | flip_mask);
OUT_RING(0);
@ -5106,29 +5108,56 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc,
}
/* Offset into the new buffer for cases of shared fbs between CRTCs */
offset = obj_priv->gtt_offset;
offset += (crtc->y * fb->pitch) + (crtc->x * (fb->bits_per_pixel) / 8);
offset = crtc->y * fb->pitch + crtc->x * fb->bits_per_pixel/8;
BEGIN_LP_RING(4);
if (IS_I965G(dev)) {
switch(INTEL_INFO(dev)->gen) {
case 2:
OUT_RING(MI_DISPLAY_FLIP |
MI_DISPLAY_FLIP_PLANE(intel_crtc->plane));
OUT_RING(fb->pitch);
OUT_RING(offset | obj_priv->tiling_mode);
pipesrc = I915_READ(pipesrc_reg);
OUT_RING(pipesrc & 0x0fff0fff);
} else if (IS_GEN3(dev)) {
OUT_RING(obj_priv->gtt_offset + offset);
OUT_RING(MI_NOOP);
break;
case 3:
OUT_RING(MI_DISPLAY_FLIP_I915 |
MI_DISPLAY_FLIP_PLANE(intel_crtc->plane));
OUT_RING(fb->pitch);
OUT_RING(offset);
OUT_RING(obj_priv->gtt_offset + offset);
OUT_RING(MI_NOOP);
} else {
break;
case 4:
case 5:
/* i965+ uses the linear or tiled offsets from the
* Display Registers (which do not change across a page-flip)
* so we need only reprogram the base address.
*/
OUT_RING(MI_DISPLAY_FLIP |
MI_DISPLAY_FLIP_PLANE(intel_crtc->plane));
OUT_RING(fb->pitch);
OUT_RING(offset);
OUT_RING(MI_NOOP);
OUT_RING(obj_priv->gtt_offset | obj_priv->tiling_mode);
/* XXX Enabling the panel-fitter across page-flip is so far
* untested on non-native modes, so ignore it for now.
* pf = I915_READ(pipe == 0 ? PFA_CTL_1 : PFB_CTL_1) & PF_ENABLE;
*/
pf = 0;
pipesrc = I915_READ(pipe == 0 ? PIPEASRC : PIPEBSRC) & 0x0fff0fff;
OUT_RING(pf | pipesrc);
break;
case 6:
OUT_RING(MI_DISPLAY_FLIP |
MI_DISPLAY_FLIP_PLANE(intel_crtc->plane));
OUT_RING(fb->pitch | obj_priv->tiling_mode);
OUT_RING(obj_priv->gtt_offset);
pf = I915_READ(pipe == 0 ? PFA_CTL_1 : PFB_CTL_1) & PF_ENABLE;
pipesrc = I915_READ(pipe == 0 ? PIPEASRC : PIPEBSRC) & 0x0fff0fff;
OUT_RING(pf | pipesrc);
break;
}
ADVANCE_LP_RING();