From: Mario Kleiner Date: Sat, 23 Oct 2010 02:42:17 +0000 (+0200) Subject: drm/kms/radeon: Add support for precise vblank timestamping. X-Git-Tag: v2.6.38-rc1~419^2~41^2~4 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f5a8020903932624cf020dc72455a10a3e005087;p=pandora-kernel.git drm/kms/radeon: Add support for precise vblank timestamping. This patch adds new functions for use by the drm core: .get_vblank_timestamp() provides a precise timestamp for the end of the most recent (or current) vblank interval of a given crtc, as needed for the DRI2 implementation of the OML_sync_control extension. It is a thin wrapper around the drm function drm_calc_vbltimestamp_from_scanoutpos() which does almost all the work and is shared across drivers. .get_scanout_position() provides the current horizontal and vertical video scanout position and "in vblank" status of a given crtc, as needed by the drm for use by drm_calc_vbltimestamp_from_scanoutpos(). The function is also used by the dynamic gpu reclocking code to determine when it is safe to reclock inside vblank. For that purpose radeon_pm_in_vbl() is modified to accomodate a small change in the function prototype of the radeon_get_crtc_scanoutpos() which is hooked up to .get_scanout_position(). This code has been tested on AVIVO hardware, a RV530 (ATI Mobility Radeon X1600) in a Intel Core-2 Duo MacBookPro and some R600 variant (FireGL V7600) in a single cpu AMD Athlon 64 PC. Signed-off-by: Mario Kleiner Reviewed-by: Alex Deucher Signed-off-by: Dave Airlie --- Reading git-diff-tree failed