121 lines
3.9 KiB
C
121 lines
3.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (c) 2016-2018, The Linux Foundation. All rights reserved.
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*/
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#ifndef __DPU_RM_H__
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#define __DPU_RM_H__
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#include <linux/list.h>
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#include "msm_kms.h"
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#include "dpu_hw_top.h"
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/**
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* struct dpu_rm - DPU dynamic hardware resource manager
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* @hw_blks: array of lists of hardware resources present in the system, one
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* list per type of hardware block
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* @lm_max_width: cached layer mixer maximum width
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* @rm_lock: resource manager mutex
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*/
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struct dpu_rm {
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struct list_head hw_blks[DPU_HW_BLK_MAX];
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uint32_t lm_max_width;
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struct mutex rm_lock;
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};
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/**
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* struct dpu_rm_hw_blk - resource manager internal structure
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* forward declaration for single iterator definition without void pointer
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*/
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struct dpu_rm_hw_blk;
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/**
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* struct dpu_rm_hw_iter - iterator for use with dpu_rm
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* @hw: dpu_hw object requested, or NULL on failure
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* @blk: dpu_rm internal block representation. Clients ignore. Used as iterator.
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* @enc_id: DRM ID of Encoder client wishes to search for, or 0 for Any Encoder
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* @type: Hardware Block Type client wishes to search for.
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*/
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struct dpu_rm_hw_iter {
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void *hw;
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struct dpu_rm_hw_blk *blk;
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uint32_t enc_id;
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enum dpu_hw_blk_type type;
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};
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/**
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* dpu_rm_init - Read hardware catalog and create reservation tracking objects
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* for all HW blocks.
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* @rm: DPU Resource Manager handle
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* @cat: Pointer to hardware catalog
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* @mmio: mapped register io address of MDP
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* @Return: 0 on Success otherwise -ERROR
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*/
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int dpu_rm_init(struct dpu_rm *rm,
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struct dpu_mdss_cfg *cat,
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void __iomem *mmio);
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/**
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* dpu_rm_destroy - Free all memory allocated by dpu_rm_init
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* @rm: DPU Resource Manager handle
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* @Return: 0 on Success otherwise -ERROR
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*/
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int dpu_rm_destroy(struct dpu_rm *rm);
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/**
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* dpu_rm_reserve - Given a CRTC->Encoder->Connector display chain, analyze
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* the use connections and user requirements, specified through related
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* topology control properties, and reserve hardware blocks to that
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* display chain.
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* HW blocks can then be accessed through dpu_rm_get_* functions.
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* HW Reservations should be released via dpu_rm_release_hw.
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* @rm: DPU Resource Manager handle
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* @drm_enc: DRM Encoder handle
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* @crtc_state: Proposed Atomic DRM CRTC State handle
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* @topology: Pointer to topology info for the display
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* @test_only: Atomic-Test phase, discard results (unless property overrides)
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* @Return: 0 on Success otherwise -ERROR
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*/
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int dpu_rm_reserve(struct dpu_rm *rm,
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struct drm_encoder *drm_enc,
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struct drm_crtc_state *crtc_state,
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struct msm_display_topology topology,
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bool test_only);
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/**
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* dpu_rm_reserve - Given the encoder for the display chain, release any
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* HW blocks previously reserved for that use case.
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* @rm: DPU Resource Manager handle
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* @enc: DRM Encoder handle
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* @Return: 0 on Success otherwise -ERROR
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*/
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void dpu_rm_release(struct dpu_rm *rm, struct drm_encoder *enc);
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/**
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* dpu_rm_init_hw_iter - setup given iterator for new iteration over hw list
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* using dpu_rm_get_hw
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* @iter: iter object to initialize
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* @enc_id: DRM ID of Encoder client wishes to search for, or 0 for Any Encoder
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* @type: Hardware Block Type client wishes to search for.
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*/
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void dpu_rm_init_hw_iter(
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struct dpu_rm_hw_iter *iter,
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uint32_t enc_id,
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enum dpu_hw_blk_type type);
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/**
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* dpu_rm_get_hw - retrieve reserved hw object given encoder and hw type
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* Meant to do a single pass through the hardware list to iteratively
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* retrieve hardware blocks of a given type for a given encoder.
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* Initialize an iterator object.
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* Set hw block type of interest. Set encoder id of interest, 0 for any.
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* Function returns first hw of type for that encoder.
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* Subsequent calls will return the next reserved hw of that type in-order.
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* Iterator HW pointer will be null on failure to find hw.
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* @rm: DPU Resource Manager handle
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* @iter: iterator object
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* @Return: true on match found, false on no match found
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*/
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bool dpu_rm_get_hw(struct dpu_rm *rm, struct dpu_rm_hw_iter *iter);
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#endif /* __DPU_RM_H__ */
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