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__ */ 85