xref: /linux/drivers/gpu/drm/renesas/rcar-du/rcar_du_crtc.h (revision cdd5b5a9761fd66d17586e4f4ba6588c70e640ea)
1 /* SPDX-License-Identifier: GPL-2.0+ */
2 /*
3  * R-Car Display Unit CRTCs
4  *
5  * Copyright (C) 2013-2015 Renesas Electronics Corporation
6  *
7  * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
8  */
9 
10 #ifndef __RCAR_DU_CRTC_H__
11 #define __RCAR_DU_CRTC_H__
12 
13 #include <linux/mutex.h>
14 #include <linux/spinlock.h>
15 #include <linux/wait.h>
16 
17 #include <drm/drm_crtc.h>
18 #include <drm/drm_writeback.h>
19 
20 #include <media/vsp1.h>
21 
22 struct rcar_du_group;
23 struct rcar_du_vsp;
24 
25 /**
26  * struct rcar_du_crtc - the CRTC, representing a DU superposition processor
27  * @crtc: base DRM CRTC
28  * @dev: the DU device
29  * @clock: the CRTC functional clock
30  * @extclock: external pixel dot clock (optional)
31  * @mmio_offset: offset of the CRTC registers in the DU MMIO block
32  * @index: CRTC hardware index
33  * @initialized: whether the CRTC has been initialized and clocks enabled
34  * @dsysr: cached value of the DSYSR register
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  * @group: CRTC group this CRTC belongs to
42  * @cmm: CMM associated with this CRTC
43  * @vsp: VSP feeding video to this CRTC
44  * @vsp_pipe: index of the VSP pipeline feeding video to this CRTC
45  * @writeback: the writeback connector
46  */
47 struct rcar_du_crtc {
48 	struct drm_crtc crtc;
49 
50 	struct rcar_du_device *dev;
51 	struct clk *clock;
52 	struct clk *extclock;
53 	unsigned int mmio_offset;
54 	unsigned int index;
55 	bool initialized;
56 
57 	u32 dsysr;
58 
59 	bool vblank_enable;
60 	struct drm_pending_vblank_event *event;
61 	wait_queue_head_t flip_wait;
62 
63 	spinlock_t vblank_lock;
64 	wait_queue_head_t vblank_wait;
65 	unsigned int vblank_count;
66 
67 	struct rcar_du_group *group;
68 	struct platform_device *cmm;
69 	struct rcar_du_vsp *vsp;
70 	unsigned int vsp_pipe;
71 
72 	const char *const *sources;
73 	unsigned int sources_count;
74 
75 	struct drm_writeback_connector writeback;
76 };
77 
78 #define to_rcar_crtc(c)		container_of(c, struct rcar_du_crtc, crtc)
79 #define wb_to_rcar_crtc(c)	container_of(c, struct rcar_du_crtc, writeback)
80 
81 /**
82  * struct rcar_du_crtc_state - Driver-specific CRTC state
83  * @state: base DRM CRTC state
84  * @crc: CRC computation configuration
85  * @outputs: bitmask of the outputs (enum rcar_du_output) driven by this CRTC
86  */
87 struct rcar_du_crtc_state {
88 	struct drm_crtc_state state;
89 
90 	struct vsp1_du_crc_config crc;
91 	unsigned int outputs;
92 };
93 
94 #define to_rcar_crtc_state(s) container_of(s, struct rcar_du_crtc_state, state)
95 
96 int rcar_du_crtc_create(struct rcar_du_group *rgrp, unsigned int swindex,
97 			unsigned int hwindex);
98 
99 void rcar_du_crtc_finish_page_flip(struct rcar_du_crtc *rcrtc);
100 
101 void rcar_du_crtc_dsysr_clr_set(struct rcar_du_crtc *rcrtc, u32 clr, u32 set);
102 
103 #endif /* __RCAR_DU_CRTC_H__ */
104