1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* Copyright (c) 2015-2018, The Linux Foundation. All rights reserved. 3 */ 4 5 #ifndef _DPU_HW_PINGPONG_H 6 #define _DPU_HW_PINGPONG_H 7 8 #include "dpu_hw_catalog.h" 9 #include "dpu_hw_mdss.h" 10 #include "dpu_hw_util.h" 11 #include "dpu_hw_blk.h" 12 13 struct dpu_hw_pingpong; 14 15 struct dpu_hw_tear_check { 16 /* 17 * This is ratio of MDP VSYNC clk freq(Hz) to 18 * refresh rate divided by no of lines 19 */ 20 u32 vsync_count; 21 u32 sync_cfg_height; 22 u32 vsync_init_val; 23 u32 sync_threshold_start; 24 u32 sync_threshold_continue; 25 u32 start_pos; 26 u32 rd_ptr_irq; 27 u8 hw_vsync_mode; 28 }; 29 30 struct dpu_hw_pp_vsync_info { 31 u32 rd_ptr_init_val; /* value of rd pointer at vsync edge */ 32 u32 rd_ptr_frame_count; /* num frames sent since enabling interface */ 33 u32 rd_ptr_line_count; /* current line on panel (rd ptr) */ 34 u32 wr_ptr_line_count; /* current line within pp fifo (wr ptr) */ 35 }; 36 37 /** 38 * 39 * struct dpu_hw_pingpong_ops : Interface to the pingpong Hw driver functions 40 * Assumption is these functions will be called after clocks are enabled 41 * @setup_tearcheck : program tear check values 42 * @enable_tearcheck : enables tear check 43 * @get_vsync_info : retries timing info of the panel 44 * @setup_dither : function to program the dither hw block 45 * @get_line_count: obtain current vertical line counter 46 */ 47 struct dpu_hw_pingpong_ops { 48 /** 49 * enables vysnc generation and sets up init value of 50 * read pointer and programs the tear check cofiguration 51 */ 52 int (*setup_tearcheck)(struct dpu_hw_pingpong *pp, 53 struct dpu_hw_tear_check *cfg); 54 55 /** 56 * enables tear check block 57 */ 58 int (*enable_tearcheck)(struct dpu_hw_pingpong *pp, 59 bool enable); 60 61 /** 62 * read, modify, write to either set or clear listening to external TE 63 * @Return: 1 if TE was originally connected, 0 if not, or -ERROR 64 */ 65 int (*connect_external_te)(struct dpu_hw_pingpong *pp, 66 bool enable_external_te); 67 68 /** 69 * provides the programmed and current 70 * line_count 71 */ 72 int (*get_vsync_info)(struct dpu_hw_pingpong *pp, 73 struct dpu_hw_pp_vsync_info *info); 74 75 /** 76 * poll until write pointer transmission starts 77 * @Return: 0 on success, -ETIMEDOUT on timeout 78 */ 79 int (*poll_timeout_wr_ptr)(struct dpu_hw_pingpong *pp, u32 timeout_us); 80 81 /** 82 * Obtain current vertical line counter 83 */ 84 u32 (*get_line_count)(struct dpu_hw_pingpong *pp); 85 }; 86 87 struct dpu_hw_pingpong { 88 struct dpu_hw_blk base; 89 struct dpu_hw_blk_reg_map hw; 90 91 /* pingpong */ 92 enum dpu_pingpong idx; 93 const struct dpu_pingpong_cfg *caps; 94 95 /* ops */ 96 struct dpu_hw_pingpong_ops ops; 97 }; 98 99 /** 100 * dpu_hw_pingpong_init - initializes the pingpong driver for the passed 101 * pingpong idx. 102 * @idx: Pingpong index for which driver object is required 103 * @addr: Mapped register io address of MDP 104 * @m: Pointer to mdss catalog data 105 * Returns: Error code or allocated dpu_hw_pingpong context 106 */ 107 struct dpu_hw_pingpong *dpu_hw_pingpong_init(enum dpu_pingpong idx, 108 void __iomem *addr, 109 const struct dpu_mdss_cfg *m); 110 111 /** 112 * dpu_hw_pingpong_destroy - destroys pingpong driver context 113 * should be called to free the context 114 * @pp: Pointer to PP driver context returned by dpu_hw_pingpong_init 115 */ 116 void dpu_hw_pingpong_destroy(struct dpu_hw_pingpong *pp); 117 118 #endif /*_DPU_HW_PINGPONG_H */ 119