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Rev 6105 Rev 6938
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 */
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 */
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/**
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/**
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 * radeon_get_vblank_counter_kms - get frame count
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 * radeon_get_vblank_counter_kms - get frame count
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 *
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 *
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 * @dev: drm dev pointer
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 * @dev: drm dev pointer
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 * @crtc: crtc to get the frame count from
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 * @pipe: crtc to get the frame count from
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 *
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 *
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 * Gets the frame count on the requested crtc (all asics).
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 * Gets the frame count on the requested crtc (all asics).
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 * Returns frame count on success, -EINVAL on failure.
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 * Returns frame count on success, -EINVAL on failure.
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 */
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 */
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u32 radeon_get_vblank_counter_kms(struct drm_device *dev, int crtc)
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u32 radeon_get_vblank_counter_kms(struct drm_device *dev, unsigned int pipe)
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{
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{
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	int vpos, hpos, stat;
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	int vpos, hpos, stat;
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	u32 count;
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	u32 count;
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	struct radeon_device *rdev = dev->dev_private;
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	struct radeon_device *rdev = dev->dev_private;
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	if (crtc < 0 || crtc >= rdev->num_crtc) {
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	if (pipe >= rdev->num_crtc) {
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		DRM_ERROR("Invalid crtc %d\n", crtc);
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		DRM_ERROR("Invalid crtc %u\n", pipe);
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		return -EINVAL;
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		return -EINVAL;
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	}
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	}
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	 * incremented at start of vblank. We measure distance to start of
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	 * incremented at start of vblank. We measure distance to start of
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	 * vblank in vpos. vpos therefore will be >= 0 between start of vblank
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	 * vblank in vpos. vpos therefore will be >= 0 between start of vblank
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	 * and start of vsync, so vpos >= 0 means to bump the hw frame counter
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	 * and start of vsync, so vpos >= 0 means to bump the hw frame counter
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	 * result by 1 to give the proper appearance to caller.
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	 * result by 1 to give the proper appearance to caller.
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	 */
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	 */
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	if (rdev->mode_info.crtcs[crtc]) {
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	if (rdev->mode_info.crtcs[pipe]) {
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		/* Repeat readout if needed to provide stable result if
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		/* Repeat readout if needed to provide stable result if
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		 * we cross start of vsync during the queries.
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		 * we cross start of vsync during the queries.
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		 */
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		 */
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		do {
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		do {
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			count = radeon_get_vblank_counter(rdev, crtc);
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			count = radeon_get_vblank_counter(rdev, pipe);
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			/* Ask radeon_get_crtc_scanoutpos to return vpos as
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			/* Ask radeon_get_crtc_scanoutpos to return vpos as
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			 * distance to start of vblank, instead of regular
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			 * distance to start of vblank, instead of regular
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			 * vertical scanout pos.
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			 * vertical scanout pos.
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			 */
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			 */
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			stat = radeon_get_crtc_scanoutpos(
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			stat = radeon_get_crtc_scanoutpos(
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				dev, crtc, GET_DISTANCE_TO_VBLANKSTART,
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				dev, pipe, GET_DISTANCE_TO_VBLANKSTART,
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				&vpos, &hpos, NULL, NULL,
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				&vpos, &hpos, NULL, NULL,
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				&rdev->mode_info.crtcs[crtc]->base.hwmode);
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				&rdev->mode_info.crtcs[pipe]->base.hwmode);
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		} while (count != radeon_get_vblank_counter(rdev, crtc));
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		} while (count != radeon_get_vblank_counter(rdev, pipe));
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		if (((stat & (DRM_SCANOUTPOS_VALID | DRM_SCANOUTPOS_ACCURATE)) !=
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		if (((stat & (DRM_SCANOUTPOS_VALID | DRM_SCANOUTPOS_ACCURATE)) !=
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		    (DRM_SCANOUTPOS_VALID | DRM_SCANOUTPOS_ACCURATE))) {
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		    (DRM_SCANOUTPOS_VALID | DRM_SCANOUTPOS_ACCURATE))) {
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			DRM_DEBUG_VBL("Query failed! stat %d\n", stat);
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			DRM_DEBUG_VBL("Query failed! stat %d\n", stat);
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		}
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		}
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		else {
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		else {
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			DRM_DEBUG_VBL("crtc %d: dist from vblank start %d\n",
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			DRM_DEBUG_VBL("crtc %u: dist from vblank start %d\n",
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				      crtc, vpos);
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				      pipe, vpos);
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			/* Bump counter if we are at >= leading edge of vblank,
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			/* Bump counter if we are at >= leading edge of vblank,
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			 * but before vsync where vpos would turn negative and
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			 * but before vsync where vpos would turn negative and
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				count++;
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				count++;
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		}
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		}
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	}
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	}
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	else {
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	else {
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	    /* Fallback to use value as is. */
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	    /* Fallback to use value as is. */
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	    count = radeon_get_vblank_counter(rdev, crtc);
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	    count = radeon_get_vblank_counter(rdev, pipe);
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	    DRM_DEBUG_VBL("NULL mode info! Returned count may be wrong.\n");
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	    DRM_DEBUG_VBL("NULL mode info! Returned count may be wrong.\n");
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	}
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	}
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	return count;
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	return count;