drm/i915: add GETPARAM request for page flipping

Add a GETPARAM request for checking if page flipping is supported.
Useful for the 2D driver to enable the flipping path.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Eric Anholt <eric@anholt.net>

diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index a8efe78..fe89d0c 100644 (file)
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -810,6 +810,9 @@ static int i915_getparam(struct drm_device *dev, void *data,
        case I915_PARAM_HAS_OVERLAY:
                value = dev_priv->overlay ? 1 : 0;
                break;
+       case I915_PARAM_HAS_PAGEFLIPPING:
+               value = 1;
+               break;
        default:
                DRM_DEBUG_DRIVER("Unknown parameter %d\n",
                                        param->param);

diff --git a/include/drm/i915_drm.h b/include/drm/i915_drm.h
index c900499..1b4f3a5 100644 (file)
--- a/include/drm/i915_drm.h
+++ b/include/drm/i915_drm.h
@@ -271,6 +271,7 @@ typedef struct drm_i915_irq_wait {
 #define I915_PARAM_HAS_GEM               5
 #define I915_PARAM_NUM_FENCES_AVAIL      6
 #define I915_PARAM_HAS_OVERLAY           7
+#define I915_PARAM_HAS_PAGEFLIPPING     8
 
 typedef struct drm_i915_getparam {
        int param;