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/* Copyright (c) 2015-2018, 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_HW_PINGPONG_H
#define _DPU_HW_PINGPONG_H
#include "dpu_hw_catalog.h"
#include "dpu_hw_mdss.h"
#include "dpu_hw_util.h"
#include "dpu_hw_blk.h"
struct dpu_hw_pingpong;
struct dpu_hw_tear_check {
/*
* This is ratio of MDP VSYNC clk freq(Hz) to
* refresh rate divided by no of lines
*/
u32 vsync_count;
u32 sync_cfg_height;
u32 vsync_init_val;
u32 sync_threshold_start;
u32 sync_threshold_continue;
u32 start_pos;
u32 rd_ptr_irq;
u8 hw_vsync_mode;
};
struct dpu_hw_pp_vsync_info {
u32 rd_ptr_init_val; /* value of rd pointer at vsync edge */
u32 rd_ptr_frame_count; /* num frames sent since enabling interface */
u32 rd_ptr_line_count; /* current line on panel (rd ptr) */
u32 wr_ptr_line_count; /* current line within pp fifo (wr ptr) */
};
/**
*
* struct dpu_hw_pingpong_ops : Interface to the pingpong Hw driver functions
* Assumption is these functions will be called after clocks are enabled
* @setup_tearcheck : program tear check values
* @enable_tearcheck : enables tear check
* @get_vsync_info : retries timing info of the panel
* @setup_dither : function to program the dither hw block
* @get_line_count: obtain current vertical line counter
*/
struct dpu_hw_pingpong_ops {
/**
* enables vysnc generation and sets up init value of
* read pointer and programs the tear check cofiguration
*/
int (*setup_tearcheck)(struct dpu_hw_pingpong *pp,
struct dpu_hw_tear_check *cfg);
/**
* enables tear check block
*/
int (*enable_tearcheck)(struct dpu_hw_pingpong *pp,
bool enable);
/**
* read, modify, write to either set or clear listening to external TE
* @Return: 1 if TE was originally connected, 0 if not, or -ERROR
*/
int (*connect_external_te)(struct dpu_hw_pingpong *pp,
bool enable_external_te);
/**
* provides the programmed and current
* line_count
*/
int (*get_vsync_info)(struct dpu_hw_pingpong *pp,
struct dpu_hw_pp_vsync_info *info);
/**
* poll until write pointer transmission starts
* @Return: 0 on success, -ETIMEDOUT on timeout
*/
int (*poll_timeout_wr_ptr)(struct dpu_hw_pingpong *pp, u32 timeout_us);
/**
* Obtain current vertical line counter
*/
u32 (*get_line_count)(struct dpu_hw_pingpong *pp);
};
struct dpu_hw_pingpong {
struct dpu_hw_blk base;
struct dpu_hw_blk_reg_map hw;
/* pingpong */
enum dpu_pingpong idx;
const struct dpu_pingpong_cfg *caps;
/* ops */
struct dpu_hw_pingpong_ops ops;
};
/**
* dpu_hw_pingpong_init - initializes the pingpong driver for the passed
* pingpong idx.
* @idx: Pingpong index for which driver object is required
* @addr: Mapped register io address of MDP
* @m: Pointer to mdss catalog data
* Returns: Error code or allocated dpu_hw_pingpong context
*/
struct dpu_hw_pingpong *dpu_hw_pingpong_init(enum dpu_pingpong idx,
void __iomem *addr,
struct dpu_mdss_cfg *m);
/**
* dpu_hw_pingpong_destroy - destroys pingpong driver context
* should be called to free the context
* @pp: Pointer to PP driver context returned by dpu_hw_pingpong_init
*/
void dpu_hw_pingpong_destroy(struct dpu_hw_pingpong *pp);
#endif /*_DPU_HW_PINGPONG_H */
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