2 * Copyright (c) 2016-2018, The Linux Foundation. All rights reserved.
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 and
6 * only version 2 as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
18 #include <linux/list.h>
21 #include "dpu_hw_top.h"
24 * enum dpu_rm_topology_name - HW resource use case in use by connector
25 * @DPU_RM_TOPOLOGY_NONE: No topology in use currently
26 * @DPU_RM_TOPOLOGY_SINGLEPIPE: 1 LM, 1 PP, 1 INTF/WB
27 * @DPU_RM_TOPOLOGY_DUALPIPE: 2 LM, 2 PP, 2 INTF/WB
28 * @DPU_RM_TOPOLOGY_DUALPIPE_3DMERGE: 2 LM, 2 PP, 3DMux, 1 INTF/WB
30 enum dpu_rm_topology_name {
31 DPU_RM_TOPOLOGY_NONE = 0,
32 DPU_RM_TOPOLOGY_SINGLEPIPE,
33 DPU_RM_TOPOLOGY_DUALPIPE,
34 DPU_RM_TOPOLOGY_DUALPIPE_3DMERGE,
39 * enum dpu_rm_topology_control - HW resource use case in use by connector
40 * @DPU_RM_TOPCTL_RESERVE_LOCK: If set, in AtomicTest phase, after a successful
41 * test, reserve the resources for this display.
42 * Normal behavior would not impact the reservation
43 * list during the AtomicTest phase.
44 * @DPU_RM_TOPCTL_RESERVE_CLEAR: If set, in AtomicTest phase, before testing,
45 * release any reservation held by this display.
46 * Normal behavior would not impact the
47 * reservation list during the AtomicTest phase.
48 * @DPU_RM_TOPCTL_DS : Require layer mixers with DS capabilities
50 enum dpu_rm_topology_control {
51 DPU_RM_TOPCTL_RESERVE_LOCK,
52 DPU_RM_TOPCTL_RESERVE_CLEAR,
57 * struct dpu_rm - DPU dynamic hardware resource manager
58 * @dev: device handle for event logging purposes
59 * @rsvps: list of hardware reservations by each crtc->encoder->connector
60 * @hw_blks: array of lists of hardware resources present in the system, one
61 * list per type of hardware block
62 * @hw_mdp: hardware object for mdp_top
63 * @lm_max_width: cached layer mixer maximum width
64 * @rsvp_next_seq: sequence number for next reservation for debugging purposes
65 * @rm_lock: resource manager mutex
68 struct drm_device *dev;
69 struct list_head rsvps;
70 struct list_head hw_blks[DPU_HW_BLK_MAX];
71 struct dpu_hw_mdp *hw_mdp;
72 uint32_t lm_max_width;
73 uint32_t rsvp_next_seq;
78 * struct dpu_rm_hw_blk - resource manager internal structure
79 * forward declaration for single iterator definition without void pointer
84 * struct dpu_rm_hw_iter - iterator for use with dpu_rm
85 * @hw: dpu_hw object requested, or NULL on failure
86 * @blk: dpu_rm internal block representation. Clients ignore. Used as iterator.
87 * @enc_id: DRM ID of Encoder client wishes to search for, or 0 for Any Encoder
88 * @type: Hardware Block Type client wishes to search for.
90 struct dpu_rm_hw_iter {
92 struct dpu_rm_hw_blk *blk;
94 enum dpu_hw_blk_type type;
98 * dpu_rm_init - Read hardware catalog and create reservation tracking objects
100 * @rm: DPU Resource Manager handle
101 * @cat: Pointer to hardware catalog
102 * @mmio: mapped register io address of MDP
103 * @dev: device handle for event logging purposes
104 * @Return: 0 on Success otherwise -ERROR
106 int dpu_rm_init(struct dpu_rm *rm,
107 struct dpu_mdss_cfg *cat,
109 struct drm_device *dev);
112 * dpu_rm_destroy - Free all memory allocated by dpu_rm_init
113 * @rm: DPU Resource Manager handle
114 * @Return: 0 on Success otherwise -ERROR
116 int dpu_rm_destroy(struct dpu_rm *rm);
119 * dpu_rm_reserve - Given a CRTC->Encoder->Connector display chain, analyze
120 * the use connections and user requirements, specified through related
121 * topology control properties, and reserve hardware blocks to that
123 * HW blocks can then be accessed through dpu_rm_get_* functions.
124 * HW Reservations should be released via dpu_rm_release_hw.
125 * @rm: DPU Resource Manager handle
126 * @drm_enc: DRM Encoder handle
127 * @crtc_state: Proposed Atomic DRM CRTC State handle
128 * @conn_state: Proposed Atomic DRM Connector State handle
129 * @topology: Pointer to topology info for the display
130 * @test_only: Atomic-Test phase, discard results (unless property overrides)
131 * @Return: 0 on Success otherwise -ERROR
133 int dpu_rm_reserve(struct dpu_rm *rm,
134 struct drm_encoder *drm_enc,
135 struct drm_crtc_state *crtc_state,
136 struct drm_connector_state *conn_state,
137 struct msm_display_topology topology,
141 * dpu_rm_reserve - Given the encoder for the display chain, release any
142 * HW blocks previously reserved for that use case.
143 * @rm: DPU Resource Manager handle
144 * @enc: DRM Encoder handle
145 * @Return: 0 on Success otherwise -ERROR
147 void dpu_rm_release(struct dpu_rm *rm, struct drm_encoder *enc);
150 * dpu_rm_get_mdp - Retrieve HW block for MDP TOP.
151 * This is never reserved, and is usable by any display.
152 * @rm: DPU Resource Manager handle
153 * @Return: Pointer to hw block or NULL
155 struct dpu_hw_mdp *dpu_rm_get_mdp(struct dpu_rm *rm);
158 * dpu_rm_init_hw_iter - setup given iterator for new iteration over hw list
159 * using dpu_rm_get_hw
160 * @iter: iter object to initialize
161 * @enc_id: DRM ID of Encoder client wishes to search for, or 0 for Any Encoder
162 * @type: Hardware Block Type client wishes to search for.
164 void dpu_rm_init_hw_iter(
165 struct dpu_rm_hw_iter *iter,
167 enum dpu_hw_blk_type type);
169 * dpu_rm_get_hw - retrieve reserved hw object given encoder and hw type
170 * Meant to do a single pass through the hardware list to iteratively
171 * retrieve hardware blocks of a given type for a given encoder.
172 * Initialize an iterator object.
173 * Set hw block type of interest. Set encoder id of interest, 0 for any.
174 * Function returns first hw of type for that encoder.
175 * Subsequent calls will return the next reserved hw of that type in-order.
176 * Iterator HW pointer will be null on failure to find hw.
177 * @rm: DPU Resource Manager handle
178 * @iter: iterator object
179 * @Return: true on match found, false on no match found
181 bool dpu_rm_get_hw(struct dpu_rm *rm, struct dpu_rm_hw_iter *iter);
184 * dpu_rm_check_property_topctl - validate property bitmask before it is set
185 * @val: user's proposed topology control bitmask
186 * @Return: 0 on success or error
188 int dpu_rm_check_property_topctl(uint64_t val);
191 * dpu_rm_get_topology_name - returns the name of the the given topology
193 * @topology: topology definition
194 * @Return: name of the topology
196 enum dpu_rm_topology_name
197 dpu_rm_get_topology_name(struct msm_display_topology topology);
199 #endif /* __DPU_RM_H__ */