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By always keeping track of the last commit in plane_state, we know whether there is an active update on the plane or not. With that information we can reject the fast update, and force the slowpath to be used as was originally intended. We cannot use plane_state->crtc->state here, because this only mentions the most recent commit for the crtc, but not the planes that were part of it. We specifically care about what the last commit involving this plane is, which can only be tracked with a pointer in the plane state. Changes since v1: - Clean up the whole function here, instead of partially earlier. - Add mention in the commit message why we need commit in plane_state. - Swap plane->state in intel_legacy_cursor_update, instead of reassigning all variables. With this commit We know that the cursor is not part of any active commits so this hack can be removed. Cc: Gustavo Padovan <gustavo.padovan@collabora.com> Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Reviewed-by: Gustavo Padovan <gustavo.padovan@collabora.com> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> #v1 Link: https://patchwork.freedesktop.org/patch/msgid/20170904104838.23822-7-maarten.lankhorst@linux.intel.com [mlankhorst: Amend commit for merge conflicts with drm-intel] |
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| README | ||
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.