1 /*
2  * Copyright (C) 2012 Russell King
3  *
4  * This program is free software; you can redistribute it and/or modify
5  * it under the terms of the GNU General Public License version 2 as
6  * published by the Free Software Foundation.
7  */
8 #ifndef ARMADA_DRM_H
9 #define ARMADA_DRM_H
10 
11 #include <linux/kfifo.h>
12 #include <linux/io.h>
13 #include <linux/workqueue.h>
14 #include <drm/drmP.h>
15 
16 struct armada_crtc;
17 struct armada_gem_object;
18 struct clk;
19 struct drm_fb_helper;
20 
21 static inline void
22 armada_updatel(uint32_t val, uint32_t mask, void __iomem *ptr)
23 {
24 	uint32_t ov, v;
25 
26 	ov = v = readl_relaxed(ptr);
27 	v = (v & ~mask) | val;
28 	if (ov != v)
29 		writel_relaxed(v, ptr);
30 }
31 
32 static inline uint32_t armada_pitch(uint32_t width, uint32_t bpp)
33 {
34 	uint32_t pitch = bpp != 4 ? width * ((bpp + 7) / 8) : width / 2;
35 
36 	/* 88AP510 spec recommends pitch be a multiple of 128 */
37 	return ALIGN(pitch, 128);
38 }
39 
40 struct armada_vbl_event {
41 	struct list_head	node;
42 	void			*data;
43 	void			(*fn)(struct armada_crtc *, void *);
44 };
45 void armada_drm_vbl_event_add(struct armada_crtc *,
46 	struct armada_vbl_event *);
47 void armada_drm_vbl_event_remove(struct armada_crtc *,
48 	struct armada_vbl_event *);
49 void armada_drm_vbl_event_remove_unlocked(struct armada_crtc *,
50 	struct armada_vbl_event *);
51 #define armada_drm_vbl_event_init(_e, _f, _d) do {	\
52 	struct armada_vbl_event *__e = _e;		\
53 	INIT_LIST_HEAD(&__e->node);			\
54 	__e->data = _d;					\
55 	__e->fn = _f;					\
56 } while (0)
57 
58 
59 struct armada_private;
60 
61 struct armada_variant {
62 	bool	has_spu_adv_reg;
63 	uint32_t spu_adv_reg;
64 	int (*init)(struct armada_private *, struct device *);
65 	int (*crtc_init)(struct armada_crtc *);
66 	int (*crtc_compute_clock)(struct armada_crtc *,
67 				  const struct drm_display_mode *,
68 				  uint32_t *);
69 };
70 
71 /* Variant ops */
72 extern const struct armada_variant armada510_ops;
73 
74 struct armada_private {
75 	const struct armada_variant *variant;
76 	struct work_struct	fb_unref_work;
77 	DECLARE_KFIFO(fb_unref, struct drm_framebuffer *, 8);
78 	struct drm_fb_helper	*fbdev;
79 	struct armada_crtc	*dcrtc[2];
80 	struct drm_mm		linear;
81 	struct clk		*extclk[2];
82 	struct drm_property	*csc_yuv_prop;
83 	struct drm_property	*csc_rgb_prop;
84 	struct drm_property	*colorkey_prop;
85 	struct drm_property	*colorkey_min_prop;
86 	struct drm_property	*colorkey_max_prop;
87 	struct drm_property	*colorkey_val_prop;
88 	struct drm_property	*colorkey_alpha_prop;
89 	struct drm_property	*colorkey_mode_prop;
90 	struct drm_property	*brightness_prop;
91 	struct drm_property	*contrast_prop;
92 	struct drm_property	*saturation_prop;
93 #ifdef CONFIG_DEBUG_FS
94 	struct dentry		*de;
95 #endif
96 };
97 
98 void __armada_drm_queue_unref_work(struct drm_device *,
99 	struct drm_framebuffer *);
100 void armada_drm_queue_unref_work(struct drm_device *,
101 	struct drm_framebuffer *);
102 
103 extern const struct drm_mode_config_funcs armada_drm_mode_config_funcs;
104 
105 int armada_fbdev_init(struct drm_device *);
106 void armada_fbdev_lastclose(struct drm_device *);
107 void armada_fbdev_fini(struct drm_device *);
108 
109 int armada_overlay_plane_create(struct drm_device *, unsigned long);
110 
111 int armada_drm_debugfs_init(struct drm_minor *);
112 void armada_drm_debugfs_cleanup(struct drm_minor *);
113 
114 #endif
115