From 315486c665333a49be20643c9137d9641f32e2b7 Mon Sep 17 00:00:00 2001 From: Andrea Merello Date: Thu, 25 Aug 2016 11:04:34 +0200 Subject: drm: simple_kms_helper: add support for bridges MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Introduce drm_simple_display_pipe_attach_bridge() and drm_simple_display_pipe_detach_bridge() in order to make it possible to use drm encoders with the simple display pipes managed by simple_kms_helpers Suggested-by: Daniel Vetter Signed-off-by: Andrea Merello Reviewed-by: Daniel Vetter Cc: Noralf Trønnes Cc: Daniel Vetter Cc: David Airlie Signed-off-by: Archit Taneja Link: http://patchwork.freedesktop.org/patch/msgid/1472115874-6219-3-git-send-email-andrea.merello@gmail.com --- drivers/gpu/drm/drm_simple_kms_helper.c | 40 +++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) (limited to 'drivers/gpu') diff --git a/drivers/gpu/drm/drm_simple_kms_helper.c b/drivers/gpu/drm/drm_simple_kms_helper.c index 3301e4a9f7cd..7b6d26e64977 100644 --- a/drivers/gpu/drm/drm_simple_kms_helper.c +++ b/drivers/gpu/drm/drm_simple_kms_helper.c @@ -139,6 +139,46 @@ static const struct drm_plane_funcs drm_simple_kms_plane_funcs = { .atomic_destroy_state = drm_atomic_helper_plane_destroy_state, }; +/** + * drm_simple_display_pipe_attach_bridge - Attach a bridge to the display pipe + * @pipe: simple display pipe object + * @bridge: bridge to attach + * + * Makes it possible to still use the drm_simple_display_pipe helpers when + * a DRM bridge has to be used. + * + * Note that you probably want to initialize the pipe by passing a NULL + * connector to drm_simple_display_pipe_init(). + * + * Returns: + * Zero on success, negative error code on failure. + */ +int drm_simple_display_pipe_attach_bridge(struct drm_simple_display_pipe *pipe, + struct drm_bridge *bridge) +{ + bridge->encoder = &pipe->encoder; + pipe->encoder.bridge = bridge; + return drm_bridge_attach(pipe->encoder.dev, bridge); +} +EXPORT_SYMBOL(drm_simple_display_pipe_attach_bridge); + +/** + * drm_simple_display_pipe_detach_bridge - Detach the bridge from the display pipe + * @pipe: simple display pipe object + * + * Detaches the drm bridge previously attached with + * drm_simple_display_pipe_attach_bridge() + */ +void drm_simple_display_pipe_detach_bridge(struct drm_simple_display_pipe *pipe) +{ + if (WARN_ON(!pipe->encoder.bridge)) + return; + + drm_bridge_detach(pipe->encoder.bridge); + pipe->encoder.bridge = NULL; +} +EXPORT_SYMBOL(drm_simple_display_pipe_detach_bridge); + /** * drm_simple_display_pipe_init - Initialize a simple display pipeline * @dev: DRM device -- cgit v1.2.3