lkml.org 
[lkml]   [2011]   [Jan]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH] drm/i915: Handle the no-interrupts case for UMS by polling
    Date
    If the driver calls into the kernel to wait for a breadcrumb to pass,
    but hasn't enabled interrupts, fallback to polling the breadcrumb value.

    Reported-by: Chris Clayton <chris2553@googlemail.com>
    Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
    ---
    drivers/gpu/drm/i915/i915_irq.c | 4 ++--
    1 files changed, 2 insertions(+), 2 deletions(-)

    diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
    index 98106b7..4b5a35c 100644
    --- a/drivers/gpu/drm/i915/i915_irq.c
    +++ b/drivers/gpu/drm/i915/i915_irq.c
    @@ -1293,12 +1293,12 @@ static int i915_wait_irq(struct drm_device * dev, int irq_nr)
    if (master_priv->sarea_priv)
    master_priv->sarea_priv->perf_boxes |= I915_BOX_WAIT;

    - ret = -ENODEV;
    if (ring->irq_get(ring)) {
    DRM_WAIT_ON(ret, ring->irq_queue, 3 * DRM_HZ,
    READ_BREADCRUMB(dev_priv) >= irq_nr);
    ring->irq_put(ring);
    - }
    + } else if (wait_for(READ_BREADCRUMB(dev_priv) >= irq_nr, 3000))
    + ret = -EBUSY;

    if (ret == -EBUSY) {
    DRM_ERROR("EBUSY -- rec: %d emitted: %d\n",
    --
    1.7.2.3


    \
     
     \ /
      Last update: 2011-01-23 14:09    [W:0.021 / U:31.336 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site