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drm: simple_kms_helper: add support for bridges 

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 <daniel@ffwll.ch>
Signed-off-by: Andrea Merello <andrea.merello@gmail.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Noralf Trønnes <noralf@tronnes.org>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: David Airlie <airlied@linux.ie>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Link: http://patchwork.freedesktop.org/patch/msgid/1472115874-6219-3-git-send-email-andrea.merello@gmail.com
This commit is contained in:
Andrea Merello 2016-08-25 11:04:34 +02:00 committed by Archit Taneja
parent 4f993973d2
commit 315486c665
2 changed files with 45 additions and 0 deletions
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40
drivers/gpu/drm/drm_simple_kms_helper.c
View File

@ -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

5
include/drm/drm_simple_kms_helper.h
View File

@ -91,6 +91,11 @@ struct drm_simple_display_pipe {
const struct drm_simple_display_pipe_funcs *funcs;
};
int drm_simple_display_pipe_attach_bridge(struct drm_simple_display_pipe *pipe,
struct drm_bridge *bridge);
void drm_simple_display_pipe_detach_bridge(struct drm_simple_display_pipe *pipe);
int drm_simple_display_pipe_init(struct drm_device *dev,
struct drm_simple_display_pipe *pipe,
const struct drm_simple_display_pipe_funcs *funcs,