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