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This reverts commit527b6abe5f(Revert "drm/i915: Use atomic commits for legacy page_flips") and reapplies commitee042aa40b. ("drm/i915: Use atomic commits for legacy page_flips") The reason for the revert was because legacy cursor updates were forced to wait for pending page flips and rendering after they were converted to atomic. Commitf79f26921e(drm/i915: Add a cursor hack to allow converting legacy page flip to atomic, v3) adds a fastpath to cursor updates, which fixes the stuttering issues. With these changes I feel confident enough to re-enable cursor updates. Legacy cursor update won't block in the following cases: - Moving cursor - Changing cursor fb The legacy cursor update will still block in the following cases: - Showing/hiding cursor. - Cursor size or scaling changes. - cursor update while cursor is invisible (could be fixed, if it turns out to be important). - Cursor tiling changes (Not sure we support tiled cursors.) - Last update was a modeset. Cc: Steven Newbury <steve@snewbury.org.uk> Cc: Rafael Ristovski <rafael.ristovski@gmail.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Tested-by: Rafael Ristovski <rafael.ristovski@gmail.com> Testcase: igt/kms_cursor_legacy Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.