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_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 /** @encoder: encoder at the end of the pipeline */
89 struct drm_encoder encoder;
90 };
91
92 /**
93 * struct komeda_crtc_state
94 */
95 struct komeda_crtc_state {
96 /** @base: &drm_crtc_state */
97 struct drm_crtc_state base;
98
99 /* private properties */
100
101 /* computed state which are used by validate/check */
102 /**
103 * @affected_pipes:
104 * the affected pipelines in once display instance
105 */
106 u32 affected_pipes;
107 /**
108 * @active_pipes:
109 * the active pipelines in once display instance
110 */
111 u32 active_pipes;
112
113 /** @clock_ratio: ratio of (aclk << 32)/pxlclk */
114 u64 clock_ratio;
115
116 /** @max_slave_zorder: the maximum of slave zorder */
117 u32 max_slave_zorder;
118 };
119
120 /** struct komeda_kms_dev - for gather KMS related things */
121 struct komeda_kms_dev {
122 /** @base: &drm_device */
123 struct drm_device base;
124
125 /** @n_crtcs: valid numbers of crtcs in &komeda_kms_dev.crtcs */
126 int n_crtcs;
127 /** @crtcs: crtcs list */
128 struct komeda_crtc crtcs[KOMEDA_MAX_PIPELINES];
129 };
130
131 #define to_kplane(p) container_of(p, struct komeda_plane, base)
132 #define to_kplane_st(p) container_of(p, struct komeda_plane_state, base)
133 #define to_kconn(p) container_of(p, struct komeda_wb_connector, base)
134 #define to_kcrtc(p) container_of(p, struct komeda_crtc, base)
135 #define to_kcrtc_st(p) container_of(p, struct komeda_crtc_state, base)
136 #define to_kdev(p) container_of(p, struct komeda_kms_dev, base)
137 #define to_wb_conn(x) container_of(x, struct drm_writeback_connector, base)
138
is_writeback_only(struct drm_crtc_state * st)139 static inline bool is_writeback_only(struct drm_crtc_state *st)
140 {
141 struct komeda_wb_connector *wb_conn = to_kcrtc(st->crtc)->wb_conn;
142 struct drm_connector *conn = wb_conn ? &wb_conn->base.base : NULL;
143
144 return conn && (st->connector_mask == BIT(drm_connector_index(conn)));
145 }
146
147 static inline bool
is_only_changed_connector(struct drm_crtc_state * st,struct drm_connector * conn)148 is_only_changed_connector(struct drm_crtc_state *st, struct drm_connector *conn)
149 {
150 struct drm_crtc_state *old_st;
151 u32 changed_connectors;
152
153 old_st = drm_atomic_get_old_crtc_state(st->state, st->crtc);
154 changed_connectors = st->connector_mask ^ old_st->connector_mask;
155
156 return BIT(drm_connector_index(conn)) == changed_connectors;
157 }
158
has_flip_h(u32 rot)159 static inline bool has_flip_h(u32 rot)
160 {
161 u32 rotation = drm_rotation_simplify(rot,
162 DRM_MODE_ROTATE_0 |
163 DRM_MODE_ROTATE_90 |
164 DRM_MODE_REFLECT_MASK);
165
166 if (rotation & DRM_MODE_ROTATE_90)
167 return !!(rotation & DRM_MODE_REFLECT_Y);
168 else
169 return !!(rotation & DRM_MODE_REFLECT_X);
170 }
171
172 void komeda_crtc_get_color_config(struct drm_crtc_state *crtc_st,
173 u32 *color_depths, u32 *color_formats);
174 unsigned long komeda_crtc_get_aclk(struct komeda_crtc_state *kcrtc_st);
175
176 int komeda_kms_setup_crtcs(struct komeda_kms_dev *kms, struct komeda_dev *mdev);
177
178 int komeda_kms_add_crtcs(struct komeda_kms_dev *kms, struct komeda_dev *mdev);
179 int komeda_kms_add_planes(struct komeda_kms_dev *kms, struct komeda_dev *mdev);
180 int komeda_kms_add_private_objs(struct komeda_kms_dev *kms,
181 struct komeda_dev *mdev);
182 int komeda_kms_add_wb_connectors(struct komeda_kms_dev *kms,
183 struct komeda_dev *mdev);
184 void komeda_kms_cleanup_private_objs(struct komeda_kms_dev *kms);
185
186 void komeda_crtc_handle_event(struct komeda_crtc *kcrtc,
187 struct komeda_events *evts);
188 void komeda_crtc_flush_and_wait_for_flip_done(struct komeda_crtc *kcrtc,
189 struct completion *input_flip_done);
190
191 struct komeda_kms_dev *komeda_kms_attach(struct komeda_dev *mdev);
192 void komeda_kms_detach(struct komeda_kms_dev *kms);
193 void komeda_kms_shutdown(struct komeda_kms_dev *kms);
194
195 #endif /*_KOMEDA_KMS_H_*/
196