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

   1 /*
   2  * rcar_du_crtc.h  --  R-Car Display Unit CRTCs
   3  *
   4  * Copyright (C) 2013-2015 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
  24 #include <media/vsp1.h>
  25
  26 struct rcar_du_group;
  27 struct rcar_du_vsp;
  28
  29 /**
  30  * struct rcar_du_crtc - the CRTC, representing a DU superposition processor
  31  * @crtc: base DRM CRTC
  32  * @clock: the CRTC functional clock
  33  * @extclock: external pixel dot clock (optional)
  34  * @mmio_offset: offset of the CRTC registers in the DU MMIO block
  35  * @index: CRTC software and hardware index
  36  * @initialized: whether the CRTC has been initialized and clocks enabled
  37  * @vblank_enable: whether vblank events are enabled on this CRTC
  38  * @event: event to post when the pending page flip completes
  39  * @flip_wait: wait queue used to signal page flip completion
  40  * @vblank_lock: protects vblank_wait and vblank_count
  41  * @vblank_wait: wait queue used to signal vertical blanking
  42  * @vblank_count: number of vertical blanking interrupts to wait for
  43  * @outputs: bitmask of the outputs (enum rcar_du_output) driven by this CRTC
  44  * @group: CRTC group this CRTC belongs to
  45  * @vsp: VSP feeding video to this CRTC
  46  * @vsp_pipe: index of the VSP pipeline feeding video to this CRTC
  47  */
  48 struct rcar_du_crtc {
  49         struct drm_crtc crtc;
  50
  51         struct clk *clock;
  52         struct clk *extclock;
  53         unsigned int mmio_offset;
  54         unsigned int index;
  55         bool initialized;
  56
  57         bool vblank_enable;
  58         struct drm_pending_vblank_event *event;
  59         wait_queue_head_t flip_wait;
  60
  61         spinlock_t vblank_lock;
  62         wait_queue_head_t vblank_wait;
  63         unsigned int vblank_count;
  64
  65         unsigned int outputs;
  66
  67         struct rcar_du_group *group;
  68         struct rcar_du_vsp *vsp;
  69         unsigned int vsp_pipe;
  70 };
  71
  72 #define to_rcar_crtc(c) container_of(c, struct rcar_du_crtc, crtc)
  73
  74 /**
  75  * struct rcar_du_crtc_state - Driver-specific CRTC state
  76  * @state: base DRM CRTC state
  77  * @crc: CRC computation configuration
  78  */
  79 struct rcar_du_crtc_state {
  80         struct drm_crtc_state state;
  81
  82         struct vsp1_du_crc_config crc;
  83 };
  84
  85 #define to_rcar_crtc_state(s) container_of(s, struct rcar_du_crtc_state, state)
  86
  87 enum rcar_du_output {
  88         RCAR_DU_OUTPUT_DPAD0,
  89         RCAR_DU_OUTPUT_DPAD1,
  90         RCAR_DU_OUTPUT_LVDS0,
  91         RCAR_DU_OUTPUT_LVDS1,
  92         RCAR_DU_OUTPUT_HDMI0,
  93         RCAR_DU_OUTPUT_HDMI1,
  94         RCAR_DU_OUTPUT_TCON,
  95         RCAR_DU_OUTPUT_MAX,
  96 };
  97
  98 int rcar_du_crtc_create(struct rcar_du_group *rgrp, unsigned int swindex,
  99                         unsigned int hwindex);
 100 void rcar_du_crtc_suspend(struct rcar_du_crtc *rcrtc);
 101 void rcar_du_crtc_resume(struct rcar_du_crtc *rcrtc);
 102
 103 void rcar_du_crtc_route_output(struct drm_crtc *crtc,
 104                                enum rcar_du_output output);
 105 void rcar_du_crtc_finish_page_flip(struct rcar_du_crtc *rcrtc);
 106
 107 #endif /* __RCAR_DU_CRTC_H__ */