1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * (C) COPYRIGHT 2018 ARM Limited. All rights reserved.
4  * Author: James.Qian.Wang <james.qian.wang@arm.com>
5  *
6  */
7 #ifndef _KOMEDA_KMS_H_
8 #define _KOMEDA_KMS_H_
9 
10 #include <linux/list.h>
11 #include <drm/drm_atomic.h>
12 #include <drm/drm_atomic_helper.h>
13 #include <drm/drm_blend.h>
14 #include <drm/drm_crtc_helper.h>
15 #include <drm/drm_device.h>
16 #include <drm/drm_writeback.h>
17 #include <drm/drm_print.h>
18 
19 /**
20  * struct komeda_plane - komeda instance of drm_plane
21  */
22 struct komeda_plane {
23 	/** @base: &drm_plane */
24 	struct drm_plane base;
25 	/**
26 	 * @layer:
27 	 *
28 	 * represents available layer input pipelines for this plane.
29 	 *
30 	 * NOTE:
31 	 * the layer is not for a specific Layer, but indicate a group of
32 	 * Layers with same capabilities.
33 	 */
34 	struct komeda_layer *layer;
35 };
36 
37 /**
38  * struct komeda_plane_state
39  *
40  * The plane_state can be split into two data flow (left/right) and handled
41  * by two layers &komeda_plane.layer and &komeda_plane.layer.right
42  */
43 struct komeda_plane_state {
44 	/** @base: &drm_plane_state */
45 	struct drm_plane_state base;
46 	/** @zlist_node: zorder list node */
47 	struct list_head zlist_node;
48 
49 	/** @layer_split: on/off layer_split */
50 	u8 layer_split : 1;
51 };
52 
53 /**
54  * struct komeda_wb_connector
55  */
56 struct komeda_wb_connector {
57 	/** @base: &drm_writeback_connector */
58 	struct drm_writeback_connector base;
59 
60 	/** @wb_layer: represents associated writeback pipeline of komeda */
61 	struct komeda_layer *wb_layer;
62 };
63 
64 /**
65  * struct komeda_crtc
66  */
67 struct komeda_crtc {
68 	/** @base: &drm_crtc */
69 	struct drm_crtc base;
70 	/** @master: only master has display output */
71 	struct komeda_pipeline *master;
72 	/**
73 	 * @slave: optional
74 	 *
75 	 * Doesn't have its own display output, the handled data flow will
76 	 * merge into the master.
77 	 */
78 	struct komeda_pipeline *slave;
79 
80 	/** @slave_planes: komeda slave planes mask */
81 	u32 slave_planes;
82 
83 	/** @wb_conn: komeda write back connector */
84 	struct komeda_wb_connector *wb_conn;
85 
86 	/** @disable_done: this flip_done is for tracing the disable */
87 	struct completion *disable_done;
88 };
89 
90 /**
91  * struct komeda_crtc_state
92  */
93 struct komeda_crtc_state {
94 	/** @base: &drm_crtc_state */
95 	struct drm_crtc_state base;
96 
97 	/* private properties */
98 
99 	/* computed state which are used by validate/check */
100 	/**
101 	 * @affected_pipes:
102 	 * the affected pipelines in once display instance
103 	 */
104 	u32 affected_pipes;
105 	/**
106 	 * @active_pipes:
107 	 * the active pipelines in once display instance
108 	 */
109 	u32 active_pipes;
110 
111 	/** @clock_ratio: ratio of (aclk << 32)/pxlclk */
112 	u64 clock_ratio;
113 
114 	/** @max_slave_zorder: the maximum of slave zorder */
115 	u32 max_slave_zorder;
116 };
117 
118 /** struct komeda_kms_dev - for gather KMS related things */
119 struct komeda_kms_dev {
120 	/** @base: &drm_device */
121 	struct drm_device base;
122 
123 	/** @n_crtcs: valid numbers of crtcs in &komeda_kms_dev.crtcs */
124 	int n_crtcs;
125 	/** @crtcs: crtcs list */
126 	struct komeda_crtc crtcs[KOMEDA_MAX_PIPELINES];
127 };
128 
129 #define to_kplane(p)	container_of(p, struct komeda_plane, base)
130 #define to_kplane_st(p)	container_of(p, struct komeda_plane_state, base)
131 #define to_kconn(p)	container_of(p, struct komeda_wb_connector, base)
132 #define to_kcrtc(p)	container_of(p, struct komeda_crtc, base)
133 #define to_kcrtc_st(p)	container_of(p, struct komeda_crtc_state, base)
134 #define to_kdev(p)	container_of(p, struct komeda_kms_dev, base)
135 #define to_wb_conn(x)	container_of(x, struct drm_writeback_connector, base)
136 
is_writeback_only(struct drm_crtc_state * st)137 static inline bool is_writeback_only(struct drm_crtc_state *st)
138 {
139 	struct komeda_wb_connector *wb_conn = to_kcrtc(st->crtc)->wb_conn;
140 	struct drm_connector *conn = wb_conn ? &wb_conn->base.base : NULL;
141 
142 	return conn && (st->connector_mask == BIT(drm_connector_index(conn)));
143 }
144 
145 static inline bool
is_only_changed_connector(struct drm_crtc_state * st,struct drm_connector * conn)146 is_only_changed_connector(struct drm_crtc_state *st, struct drm_connector *conn)
147 {
148 	struct drm_crtc_state *old_st;
149 	u32 changed_connectors;
150 
151 	old_st = drm_atomic_get_old_crtc_state(st->state, st->crtc);
152 	changed_connectors = st->connector_mask ^ old_st->connector_mask;
153 
154 	return BIT(drm_connector_index(conn)) == changed_connectors;
155 }
156 
has_flip_h(u32 rot)157 static inline bool has_flip_h(u32 rot)
158 {
159 	u32 rotation = drm_rotation_simplify(rot,
160 					     DRM_MODE_ROTATE_0 |
161 					     DRM_MODE_ROTATE_90 |
162 					     DRM_MODE_REFLECT_MASK);
163 
164 	if (rotation & DRM_MODE_ROTATE_90)
165 		return !!(rotation & DRM_MODE_REFLECT_Y);
166 	else
167 		return !!(rotation & DRM_MODE_REFLECT_X);
168 }
169 
170 void komeda_crtc_get_color_config(struct drm_crtc_state *crtc_st,
171 				  u32 *color_depths, u32 *color_formats);
172 unsigned long komeda_crtc_get_aclk(struct komeda_crtc_state *kcrtc_st);
173 
174 int komeda_kms_setup_crtcs(struct komeda_kms_dev *kms, struct komeda_dev *mdev);
175 
176 int komeda_kms_add_crtcs(struct komeda_kms_dev *kms, struct komeda_dev *mdev);
177 int komeda_kms_add_planes(struct komeda_kms_dev *kms, struct komeda_dev *mdev);
178 int komeda_kms_add_private_objs(struct komeda_kms_dev *kms,
179 				struct komeda_dev *mdev);
180 int komeda_kms_add_wb_connectors(struct komeda_kms_dev *kms,
181 				 struct komeda_dev *mdev);
182 void komeda_kms_cleanup_private_objs(struct komeda_kms_dev *kms);
183 
184 void komeda_crtc_handle_event(struct komeda_crtc   *kcrtc,
185 			      struct komeda_events *evts);
186 void komeda_crtc_flush_and_wait_for_flip_done(struct komeda_crtc *kcrtc,
187 					      struct completion *input_flip_done);
188 
189 struct komeda_kms_dev *komeda_kms_attach(struct komeda_dev *mdev);
190 void komeda_kms_detach(struct komeda_kms_dev *kms);
191 
192 #endif /*_KOMEDA_KMS_H_*/
193