From: Thierry Reding Date: Fri, 27 Jun 2014 15:19:24 +0000 (+0200) Subject: drm: Introduce drm_fb_helper_prepare() X-Git-Tag: omap-for-v3.17/fixes-against-rc2~125^2~72 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=10a231026574f9ec9761b6435394b8830b485e4e;p=pandora-kernel.git drm: Introduce drm_fb_helper_prepare() To implement hotplug detection in a race-free manner, drivers must call drm_kms_helper_poll_init() before hotplug events can be triggered. Such events can be triggered right after any of the encoders or connectors are initialized. At the same time, if the drm_fb_helper_hotplug_event() helper is used by a driver, then the poll helper requires some parts of the FB helper to be initialized to prevent a crash. At the same time, drm_fb_helper_init() requires information that is not necessarily available at such an early stage (number of CRTCs and connectors), so it cannot be used yet. Add a new helper, drm_fb_helper_prepare(), that initializes the bare minimum needed to allow drm_kms_helper_poll_init() to execute and any subsequent hotplug events to be processed properly. Reviewed-by: Daniel Vetter Signed-off-by: Thierry Reding Signed-off-by: Dave Airlie --- Reading git-diff-tree failed