LXR linux/drivers/gpu/drm/rcar-du/rcar_du

   1/*
   2 * rcar_du_crtc.h  --  R-Car Display Unit CRTCs
   3 *
   4 * Copyright (C) 2013-2015 Renesas Electronics Corporation
   5 *
   6 * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
   7 *
   8 * This program is free software; you can redistribute it and/or modify
   9 * it under the terms of the GNU General Public License as published by
  10 * the Free Software Foundation; either version 2 of the License, or
  11 * (at your option) any later version.
  12 */
  13
  14#ifndef __RCAR_DU_CRTC_H__
  15#define __RCAR_DU_CRTC_H__
  16
  17#include <linux/mutex.h>
  18#include <linux/spinlock.h>
  19#include <linux/wait.h>
  20
  21#include <drm/drmP.h>
  22#include <drm/drm_crtc.h>
  23
  24struct rcar_du_group;
  25struct rcar_du_vsp;
  26
  27/**
  28 * struct rcar_du_crtc - the CRTC, representing a DU superposition processor
  29 * @crtc: base DRM CRTC
  30 * @clock: the CRTC functional clock
  31 * @extclock: external pixel dot clock (optional)
  32 * @mmio_offset: offset of the CRTC registers in the DU MMIO block
  33 * @index: CRTC software and hardware index
  34 * @initialized: whether the CRTC has been initialized and clocks enabled
  35 * @vblank_enable: whether vblank events are enabled on this CRTC
  36 * @event: event to post when the pending page flip completes
  37 * @flip_wait: wait queue used to signal page flip completion
  38 * @vblank_lock: protects vblank_wait and vblank_count
  39 * @vblank_wait: wait queue used to signal vertical blanking
  40 * @vblank_count: number of vertical blanking interrupts to wait for
  41 * @outputs: bitmask of the outputs (enum rcar_du_output) driven by this CRTC
  42 * @group: CRTC group this CRTC belongs to
  43 * @vsp: VSP feeding video to this CRTC
  44 * @vsp_pipe: index of the VSP pipeline feeding video to this CRTC
  45 */
  46struct rcar_du_crtc {
  47        struct drm_crtc crtc;
  48
  49        struct clk *clock;
  50        struct clk *extclock;
  51        unsigned int mmio_offset;
  52        unsigned int index;
  53        bool initialized;
  54
  55        bool vblank_enable;
  56        struct drm_pending_vblank_event *event;
  57        wait_queue_head_t flip_wait;
  58
  59        spinlock_t vblank_lock;
  60        wait_queue_head_t vblank_wait;
  61        unsigned int vblank_count;
  62
  63        unsigned int outputs;
  64
  65        struct rcar_du_group *group;
  66        struct rcar_du_vsp *vsp;
  67        unsigned int vsp_pipe;
  68};
  69
  70#define to_rcar_crtc(c) container_of(c, struct rcar_du_crtc, crtc)
  71
  72enum rcar_du_output {
  73        RCAR_DU_OUTPUT_DPAD0,
  74        RCAR_DU_OUTPUT_DPAD1,
  75        RCAR_DU_OUTPUT_LVDS0,
  76        RCAR_DU_OUTPUT_LVDS1,
  77        RCAR_DU_OUTPUT_HDMI0,
  78        RCAR_DU_OUTPUT_HDMI1,
  79        RCAR_DU_OUTPUT_TCON,
  80        RCAR_DU_OUTPUT_MAX,
  81};
  82
  83int rcar_du_crtc_create(struct rcar_du_group *rgrp, unsigned int index);
  84void rcar_du_crtc_suspend(struct rcar_du_crtc *rcrtc);
  85void rcar_du_crtc_resume(struct rcar_du_crtc *rcrtc);
  86
  87void rcar_du_crtc_route_output(struct drm_crtc *crtc,
  88                               enum rcar_du_output output);
  89void rcar_du_crtc_finish_page_flip(struct rcar_du_crtc *rcrtc);
  90
  91#endif /* __RCAR_DU_CRTC_H__ */
  92