xref: /openbmc/linux/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.h (revision 852a53a0)
1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * Copyright (c) 2016-2018, The Linux Foundation. All rights reserved.
4  */
5 
6 #ifndef __DPU_RM_H__
7 #define __DPU_RM_H__
8 
9 #include <linux/list.h>
10 
11 #include "msm_kms.h"
12 #include "dpu_hw_top.h"
13 
14 struct dpu_global_state;
15 
16 /**
17  * struct dpu_rm - DPU dynamic hardware resource manager
18  * @pingpong_blks: array of pingpong hardware resources
19  * @mixer_blks: array of layer mixer hardware resources
20  * @ctl_blks: array of ctl hardware resources
21  * @intf_blks: array of intf hardware resources
22  * @dspp_blks: array of dspp hardware resources
23  * @lm_max_width: cached layer mixer maximum width
24  * @rm_lock: resource manager mutex
25  */
26 struct dpu_rm {
27 	struct dpu_hw_blk *pingpong_blks[PINGPONG_MAX - PINGPONG_0];
28 	struct dpu_hw_blk *mixer_blks[LM_MAX - LM_0];
29 	struct dpu_hw_blk *ctl_blks[CTL_MAX - CTL_0];
30 	struct dpu_hw_blk *intf_blks[INTF_MAX - INTF_0];
31 	struct dpu_hw_blk *dspp_blks[DSPP_MAX - DSPP_0];
32 
33 	uint32_t lm_max_width;
34 };
35 
36 /**
37  * dpu_rm_init - Read hardware catalog and create reservation tracking objects
38  *	for all HW blocks.
39  * @rm: DPU Resource Manager handle
40  * @cat: Pointer to hardware catalog
41  * @mmio: mapped register io address of MDP
42  * @Return: 0 on Success otherwise -ERROR
43  */
44 int dpu_rm_init(struct dpu_rm *rm,
45 		struct dpu_mdss_cfg *cat,
46 		void __iomem *mmio);
47 
48 /**
49  * dpu_rm_destroy - Free all memory allocated by dpu_rm_init
50  * @rm: DPU Resource Manager handle
51  * @Return: 0 on Success otherwise -ERROR
52  */
53 int dpu_rm_destroy(struct dpu_rm *rm);
54 
55 /**
56  * dpu_rm_reserve - Given a CRTC->Encoder->Connector display chain, analyze
57  *	the use connections and user requirements, specified through related
58  *	topology control properties, and reserve hardware blocks to that
59  *	display chain.
60  *	HW blocks can then be accessed through dpu_rm_get_* functions.
61  *	HW Reservations should be released via dpu_rm_release_hw.
62  * @rm: DPU Resource Manager handle
63  * @drm_enc: DRM Encoder handle
64  * @crtc_state: Proposed Atomic DRM CRTC State handle
65  * @topology: Pointer to topology info for the display
66  * @Return: 0 on Success otherwise -ERROR
67  */
68 int dpu_rm_reserve(struct dpu_rm *rm,
69 		struct dpu_global_state *global_state,
70 		struct drm_encoder *drm_enc,
71 		struct drm_crtc_state *crtc_state,
72 		struct msm_display_topology topology);
73 
74 /**
75  * dpu_rm_reserve - Given the encoder for the display chain, release any
76  *	HW blocks previously reserved for that use case.
77  * @rm: DPU Resource Manager handle
78  * @enc: DRM Encoder handle
79  * @Return: 0 on Success otherwise -ERROR
80  */
81 void dpu_rm_release(struct dpu_global_state *global_state,
82 		struct drm_encoder *enc);
83 
84 /**
85  * Get hw resources of the given type that are assigned to this encoder.
86  */
87 int dpu_rm_get_assigned_resources(struct dpu_rm *rm,
88 	struct dpu_global_state *global_state, uint32_t enc_id,
89 	enum dpu_hw_blk_type type, struct dpu_hw_blk **blks, int blks_size);
90 #endif /* __DPU_RM_H__ */
91 
92