97fb5e8d9b
Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 294 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190529141900.825281744@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
119 lines
3.2 KiB
C
119 lines
3.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/* Copyright (c) 2015-2018, The Linux Foundation. All rights reserved.
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*/
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#ifndef _DPU_HW_PINGPONG_H
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#define _DPU_HW_PINGPONG_H
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#include "dpu_hw_catalog.h"
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#include "dpu_hw_mdss.h"
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#include "dpu_hw_util.h"
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#include "dpu_hw_blk.h"
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struct dpu_hw_pingpong;
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struct dpu_hw_tear_check {
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/*
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* This is ratio of MDP VSYNC clk freq(Hz) to
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* refresh rate divided by no of lines
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*/
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u32 vsync_count;
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u32 sync_cfg_height;
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u32 vsync_init_val;
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u32 sync_threshold_start;
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u32 sync_threshold_continue;
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u32 start_pos;
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u32 rd_ptr_irq;
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u8 hw_vsync_mode;
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};
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struct dpu_hw_pp_vsync_info {
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u32 rd_ptr_init_val; /* value of rd pointer at vsync edge */
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u32 rd_ptr_frame_count; /* num frames sent since enabling interface */
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u32 rd_ptr_line_count; /* current line on panel (rd ptr) */
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u32 wr_ptr_line_count; /* current line within pp fifo (wr ptr) */
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};
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/**
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*
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* struct dpu_hw_pingpong_ops : Interface to the pingpong Hw driver functions
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* Assumption is these functions will be called after clocks are enabled
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* @setup_tearcheck : program tear check values
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* @enable_tearcheck : enables tear check
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* @get_vsync_info : retries timing info of the panel
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* @setup_dither : function to program the dither hw block
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* @get_line_count: obtain current vertical line counter
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*/
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struct dpu_hw_pingpong_ops {
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/**
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* enables vysnc generation and sets up init value of
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* read pointer and programs the tear check cofiguration
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*/
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int (*setup_tearcheck)(struct dpu_hw_pingpong *pp,
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struct dpu_hw_tear_check *cfg);
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/**
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* enables tear check block
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*/
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int (*enable_tearcheck)(struct dpu_hw_pingpong *pp,
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bool enable);
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/**
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* read, modify, write to either set or clear listening to external TE
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* @Return: 1 if TE was originally connected, 0 if not, or -ERROR
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*/
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int (*connect_external_te)(struct dpu_hw_pingpong *pp,
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bool enable_external_te);
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/**
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* provides the programmed and current
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* line_count
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*/
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int (*get_vsync_info)(struct dpu_hw_pingpong *pp,
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struct dpu_hw_pp_vsync_info *info);
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/**
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* poll until write pointer transmission starts
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* @Return: 0 on success, -ETIMEDOUT on timeout
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*/
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int (*poll_timeout_wr_ptr)(struct dpu_hw_pingpong *pp, u32 timeout_us);
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/**
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* Obtain current vertical line counter
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*/
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u32 (*get_line_count)(struct dpu_hw_pingpong *pp);
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};
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struct dpu_hw_pingpong {
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struct dpu_hw_blk base;
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struct dpu_hw_blk_reg_map hw;
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/* pingpong */
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enum dpu_pingpong idx;
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const struct dpu_pingpong_cfg *caps;
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/* ops */
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struct dpu_hw_pingpong_ops ops;
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};
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/**
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* dpu_hw_pingpong_init - initializes the pingpong driver for the passed
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* pingpong idx.
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* @idx: Pingpong index for which driver object is required
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* @addr: Mapped register io address of MDP
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* @m: Pointer to mdss catalog data
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* Returns: Error code or allocated dpu_hw_pingpong context
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*/
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struct dpu_hw_pingpong *dpu_hw_pingpong_init(enum dpu_pingpong idx,
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void __iomem *addr,
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struct dpu_mdss_cfg *m);
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/**
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* dpu_hw_pingpong_destroy - destroys pingpong driver context
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* should be called to free the context
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* @pp: Pointer to PP driver context returned by dpu_hw_pingpong_init
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*/
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void dpu_hw_pingpong_destroy(struct dpu_hw_pingpong *pp);
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#endif /*_DPU_HW_PINGPONG_H */
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