3.13.11-ckt16 -stable review patch. If anyone has any objections, please let me know.
------------------
From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= <ville.syrjala@xxxxxxxxxxxxxxx>
commit 1f1c2e2468f937cefd6bcb645c959c7b5d9821df upstream.
Only plane A is FBC capable on gen2 (like gen3), but the panel fitter
is hooked up to pipe B, so we want to prefer pipe B + plane A.
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Reviewed-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
[danvet: Add the code comment Chris requested in his review.]
Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
Signed-off-by: Kamal Mostafa <kamal@xxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/i915_irq.c | 14 +++++++++-----
drivers/gpu/drm/i915/intel_display.c | 7 +++++--
2 files changed, 14 insertions(+), 7 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 3a10da2..5e0b5e4 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -3155,10 +3155,10 @@ static int i8xx_irq_postinstall(struct drm_device *dev)
* Returns true when a page flip has completed.
*/
static bool i8xx_handle_vblank(struct drm_device *dev,
- int pipe, u16 iir)
+ int plane, int pipe, u32 iir)
{
drm_i915_private_t *dev_priv = dev->dev_private;
- u16 flip_pending = DISPLAY_PLANE_FLIP_PENDING(pipe);
+ u16 flip_pending = DISPLAY_PLANE_FLIP_PENDING(plane);
if (!drm_handle_vblank(dev, pipe))
return false;
@@ -3166,7 +3166,7 @@ static bool i8xx_handle_vblank(struct drm_device *dev,
if ((iir & flip_pending) == 0)
return false;
- intel_prepare_page_flip(dev, pipe);
+ intel_prepare_page_flip(dev, plane);
/* We detect FlipDone by looking for the change in PendingFlip from '1'
* to '0' on the following vblank, i.e. IIR has the Pendingflip
@@ -3235,9 +3235,13 @@ static irqreturn_t i8xx_irq_handler(int irq, void *arg)
notify_ring(dev, &dev_priv->ring[RCS]);
for_each_pipe(pipe) {
+ int plane = pipe;
+ if (IS_MOBILE(dev))
+ plane = !plane;
+
if (pipe_stats[pipe] & PIPE_VBLANK_INTERRUPT_STATUS &&
- i8xx_handle_vblank(dev, pipe, iir))
- flip_mask &= ~DISPLAY_PLANE_FLIP_PENDING(pipe);
+ i8xx_handle_vblank(dev, plane, pipe, iir))
+ flip_mask &= ~DISPLAY_PLANE_FLIP_PENDING(plane);
if (pipe_stats[pipe] & PIPE_CRC_DONE_INTERRUPT_STATUS)
i9xx_pipe_crc_irq_handler(dev, pipe);
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 2d2c1e1..ae3bc77 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -9949,10 +9949,13 @@ static void intel_crtc_init(struct drm_device *dev, int pipe)
intel_crtc->lut_b[i] = i;
}
- /* Swap pipes & planes for FBC on pre-965 */
+ /*
+ * On gen2/3 only plane A can do fbc, but the panel fitter and lvds port
+ * is hooked to plane B. Hence we want plane A feeding pipe B.
+ */
intel_crtc->pipe = pipe;
intel_crtc->plane = pipe;
- if (IS_MOBILE(dev) && IS_GEN3(dev)) {
+ if (IS_MOBILE(dev) && INTEL_INFO(dev)->gen < 4) {
DRM_DEBUG_KMS("swapping pipes & planes for FBC\n");
intel_crtc->plane = !pipe;
}
--
1.9.1
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