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/wait.h>
  19
  20 #include <drm/drmP.h>
  21 #include <drm/drm_crtc.h>
  22
  23 struct rcar_du_group;
  24
  25 /**
  26  * struct rcar_du_crtc - the CRTC, representing a DU superposition processor
  27  * @crtc: base DRM CRTC
  28  * @clock: the CRTC functional clock
  29  * @extclock: external pixel dot clock (optional)
  30  * @mmio_offset: offset of the CRTC registers in the DU MMIO block
  31  * @index: CRTC software and hardware index
  32  * @started: whether the CRTC has been started and is running
  33  * @event: event to post when the pending page flip completes
  34  * @flip_wait: wait queue used to signal page flip completion
  35  * @outputs: bitmask of the outputs (enum rcar_du_output) driven by this CRTC
  36  * @enabled: whether the CRTC is enabled, used to control system resume
  37  * @group: CRTC group this CRTC belongs to
  38  */
  39 struct rcar_du_crtc {
  40         struct drm_crtc crtc;
  41
  42         struct clk *clock;
  43         struct clk *extclock;
  44         unsigned int mmio_offset;
  45         unsigned int index;
  46         bool started;
  47
  48         struct drm_pending_vblank_event *event;
  49         wait_queue_head_t flip_wait;
  50
  51         unsigned int outputs;
  52         bool enabled;
  53
  54         struct rcar_du_group *group;
  55 };
  56
  57 #define to_rcar_crtc(c) container_of(c, struct rcar_du_crtc, crtc)
  58
  59 enum rcar_du_output {
  60         RCAR_DU_OUTPUT_DPAD0,
  61         RCAR_DU_OUTPUT_DPAD1,
  62         RCAR_DU_OUTPUT_LVDS0,
  63         RCAR_DU_OUTPUT_LVDS1,
  64         RCAR_DU_OUTPUT_TCON,
  65         RCAR_DU_OUTPUT_MAX,
  66 };
  67
  68 int rcar_du_crtc_create(struct rcar_du_group *rgrp, unsigned int index);
  69 void rcar_du_crtc_enable_vblank(struct rcar_du_crtc *rcrtc, bool enable);
  70 void rcar_du_crtc_cancel_page_flip(struct rcar_du_crtc *rcrtc,
  71                                    struct drm_file *file);
  72 void rcar_du_crtc_suspend(struct rcar_du_crtc *rcrtc);
  73 void rcar_du_crtc_resume(struct rcar_du_crtc *rcrtc);
  74
  75 void rcar_du_crtc_route_output(struct drm_crtc *crtc,
  76                                enum rcar_du_output output);
  77
  78 #endif /* __RCAR_DU_CRTC_H__ */