drivers/gpu/drm/rcar-du/rcar_du_crtc.h

   1 /*
   2  * rcar_du_crtc.h  --  R-Car Display Unit CRTCs
   3  *
   4  * Copyright (C) 2013-2014 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
  24 struct rcar_du_group;
  25 struct 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  * @started: whether the CRTC has been started and is running
  35  * @event: event to post when the pending page flip completes
  36  * @flip_wait: wait queue used to signal page flip completion
  37  * @vblank_lock: protects vblank_wait and vblank_count
  38  * @vblank_wait: wait queue used to signal vertical blanking
  39  * @vblank_count: number of vertical blanking interrupts to wait for
  40  * @outputs: bitmask of the outputs (enum rcar_du_output) driven by this CRTC
  41  * @group: CRTC group this CRTC belongs to
  42  */
  43 struct rcar_du_crtc {
  44         struct drm_crtc crtc;
  45
  46         struct clk *clock;
  47         struct clk *extclock;
  48         unsigned int mmio_offset;
  49         unsigned int index;
  50         bool started;
  51
  52         struct drm_pending_vblank_event *event;
  53         wait_queue_head_t flip_wait;
  54
  55         spinlock_t vblank_lock;
  56         wait_queue_head_t vblank_wait;
  57         unsigned int vblank_count;
  58
  59         unsigned int outputs;
  60
  61         struct rcar_du_group *group;
  62         struct rcar_du_vsp *vsp;
  63 };
  64
  65 #define to_rcar_crtc(c) container_of(c, struct rcar_du_crtc, crtc)
  66
  67 enum rcar_du_output {
  68         RCAR_DU_OUTPUT_DPAD0,
  69         RCAR_DU_OUTPUT_DPAD1,
  70         RCAR_DU_OUTPUT_LVDS0,
  71         RCAR_DU_OUTPUT_LVDS1,
  72         RCAR_DU_OUTPUT_TCON,
  73         RCAR_DU_OUTPUT_MAX,
  74 };
  75
  76 int rcar_du_crtc_create(struct rcar_du_group *rgrp, unsigned int index);
  77 void rcar_du_crtc_enable_vblank(struct rcar_du_crtc *rcrtc, bool enable);
  78 void rcar_du_crtc_suspend(struct rcar_du_crtc *rcrtc);
  79 void rcar_du_crtc_resume(struct rcar_du_crtc *rcrtc);
  80
  81 void rcar_du_crtc_route_output(struct drm_crtc *crtc,
  82                                enum rcar_du_output output);
  83
  84 #endif /* __RCAR_DU_CRTC_H__ */