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The VSPDL variant drives two DU channels through two LIF and two blenders, BRU and BRS. The DU channels thus share the five available VSPDL inputs and expose them as five KMS planes. The current implementation assigns the BRS to the second LIF and thus artificially limits the number of planes for the second display channel to two at most. Lift this artificial limitation by assigning the BRU and BRS to the display pipelines on demand based on the number of planes used by each pipeline. When a display pipeline needs more than two inputs and the BRU is already in use by the other pipeline, this requires reconfiguring the other pipeline to free the BRU before processing, which can result in frame drop on both pipelines. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
73 lines
2 KiB
C
73 lines
2 KiB
C
/*
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* vsp1_drm.h -- R-Car VSP1 DRM/KMS Interface
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*
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* Copyright (C) 2015 Renesas Electronics Corporation
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*
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* Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#ifndef __VSP1_DRM_H__
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#define __VSP1_DRM_H__
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#include <linux/mutex.h>
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#include <linux/videodev2.h>
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#include <linux/wait.h>
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#include "vsp1_pipe.h"
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/**
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* vsp1_drm_pipeline - State for the API exposed to the DRM driver
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* @pipe: the VSP1 pipeline used for display
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* @width: output display width
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* @height: output display height
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* @force_bru_release: when set, release the BRU during the next reconfiguration
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* @wait_queue: wait queue to wait for BRU release completion
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* @du_complete: frame completion callback for the DU driver (optional)
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* @du_private: data to be passed to the du_complete callback
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*/
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struct vsp1_drm_pipeline {
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struct vsp1_pipeline pipe;
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unsigned int width;
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unsigned int height;
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bool force_bru_release;
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wait_queue_head_t wait_queue;
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/* Frame synchronisation */
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void (*du_complete)(void *, bool);
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void *du_private;
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};
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/**
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* vsp1_drm - State for the API exposed to the DRM driver
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* @pipe: the VSP1 DRM pipeline used for display
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* @lock: protects the BRU and BRS allocation
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* @inputs: source crop rectangle, destination compose rectangle and z-order
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* position for every input (indexed by RPF index)
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*/
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struct vsp1_drm {
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struct vsp1_drm_pipeline pipe[VSP1_MAX_LIF];
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struct mutex lock;
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struct {
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struct v4l2_rect crop;
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struct v4l2_rect compose;
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unsigned int zpos;
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} inputs[VSP1_MAX_RPF];
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};
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static inline struct vsp1_drm_pipeline *
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to_vsp1_drm_pipeline(struct vsp1_pipeline *pipe)
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{
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return container_of(pipe, struct vsp1_drm_pipeline, pipe);
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}
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int vsp1_drm_init(struct vsp1_device *vsp1);
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void vsp1_drm_cleanup(struct vsp1_device *vsp1);
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#endif /* __VSP1_DRM_H__ */
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