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/*
* Copyright (c) 2016-2018, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#ifndef __DPU_RM_H__
#define __DPU_RM_H__
#include <linux/list.h>
#include "msm_kms.h"
#include "dpu_hw_top.h"
/**
* struct dpu_rm - DPU dynamic hardware resource manager
* @dev: device handle for event logging purposes
* @rsvps: list of hardware reservations by each crtc->encoder->connector
* @hw_blks: array of lists of hardware resources present in the system, one
* list per type of hardware block
* @hw_mdp: hardware object for mdp_top
* @lm_max_width: cached layer mixer maximum width
* @rsvp_next_seq: sequence number for next reservation for debugging purposes
* @rm_lock: resource manager mutex
*/
struct dpu_rm {
struct drm_device *dev;
struct list_head rsvps;
struct list_head hw_blks[DPU_HW_BLK_MAX];
struct dpu_hw_mdp *hw_mdp;
uint32_t lm_max_width;
uint32_t rsvp_next_seq;
struct mutex rm_lock;
};
/**
* struct dpu_rm_hw_blk - resource manager internal structure
* forward declaration for single iterator definition without void pointer
*/
struct dpu_rm_hw_blk;
/**
* struct dpu_rm_hw_iter - iterator for use with dpu_rm
* @hw: dpu_hw object requested, or NULL on failure
* @blk: dpu_rm internal block representation. Clients ignore. Used as iterator.
* @enc_id: DRM ID of Encoder client wishes to search for, or 0 for Any Encoder
* @type: Hardware Block Type client wishes to search for.
*/
struct dpu_rm_hw_iter {
void *hw;
struct dpu_rm_hw_blk *blk;
uint32_t enc_id;
enum dpu_hw_blk_type type;
};
/**
* dpu_rm_init - Read hardware catalog and create reservation tracking objects
* for all HW blocks.
* @rm: DPU Resource Manager handle
* @cat: Pointer to hardware catalog
* @mmio: mapped register io address of MDP
* @dev: device handle for event logging purposes
* @Return: 0 on Success otherwise -ERROR
*/
int dpu_rm_init(struct dpu_rm *rm,
struct dpu_mdss_cfg *cat,
void __iomem *mmio,
struct drm_device *dev);
/**
* dpu_rm_destroy - Free all memory allocated by dpu_rm_init
* @rm: DPU Resource Manager handle
* @Return: 0 on Success otherwise -ERROR
*/
int dpu_rm_destroy(struct dpu_rm *rm);
/**
* dpu_rm_reserve - Given a CRTC->Encoder->Connector display chain, analyze
* the use connections and user requirements, specified through related
* topology control properties, and reserve hardware blocks to that
* display chain.
* HW blocks can then be accessed through dpu_rm_get_* functions.
* HW Reservations should be released via dpu_rm_release_hw.
* @rm: DPU Resource Manager handle
* @drm_enc: DRM Encoder handle
* @crtc_state: Proposed Atomic DRM CRTC State handle
* @topology: Pointer to topology info for the display
* @test_only: Atomic-Test phase, discard results (unless property overrides)
* @Return: 0 on Success otherwise -ERROR
*/
int dpu_rm_reserve(struct dpu_rm *rm,
struct drm_encoder *drm_enc,
struct drm_crtc_state *crtc_state,
struct msm_display_topology topology,
bool test_only);
/**
* dpu_rm_reserve - Given the encoder for the display chain, release any
* HW blocks previously reserved for that use case.
* @rm: DPU Resource Manager handle
* @enc: DRM Encoder handle
* @Return: 0 on Success otherwise -ERROR
*/
void dpu_rm_release(struct dpu_rm *rm, struct drm_encoder *enc);
/**
* dpu_rm_get_mdp - Retrieve HW block for MDP TOP.
* This is never reserved, and is usable by any display.
* @rm: DPU Resource Manager handle
* @Return: Pointer to hw block or NULL
*/
struct dpu_hw_mdp *dpu_rm_get_mdp(struct dpu_rm *rm);
/**
* dpu_rm_init_hw_iter - setup given iterator for new iteration over hw list
* using dpu_rm_get_hw
* @iter: iter object to initialize
* @enc_id: DRM ID of Encoder client wishes to search for, or 0 for Any Encoder
* @type: Hardware Block Type client wishes to search for.
*/
void dpu_rm_init_hw_iter(
struct dpu_rm_hw_iter *iter,
uint32_t enc_id,
enum dpu_hw_blk_type type);
/**
* dpu_rm_get_hw - retrieve reserved hw object given encoder and hw type
* Meant to do a single pass through the hardware list to iteratively
* retrieve hardware blocks of a given type for a given encoder.
* Initialize an iterator object.
* Set hw block type of interest. Set encoder id of interest, 0 for any.
* Function returns first hw of type for that encoder.
* Subsequent calls will return the next reserved hw of that type in-order.
* Iterator HW pointer will be null on failure to find hw.
* @rm: DPU Resource Manager handle
* @iter: iterator object
* @Return: true on match found, false on no match found
*/
bool dpu_rm_get_hw(struct dpu_rm *rm, struct dpu_rm_hw_iter *iter);
/**
* dpu_rm_check_property_topctl - validate property bitmask before it is set
* @val: user's proposed topology control bitmask
* @Return: 0 on success or error
*/
int dpu_rm_check_property_topctl(uint64_t val);
#endif /* __DPU_RM_H__ */
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