drivers/gpu/drm/msm/dsi/pll/dsi_pll.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Copyright (c) 2012-2015, The Linux Foundation. All rights reserved.
   4  */
   5
   6 #ifndef __DSI_PLL_H__
   7 #define __DSI_PLL_H__
   8
   9 #include <linux/clk-provider.h>
  10 #include <linux/delay.h>
  11
  12 #include "dsi.h"
  13
  14 #define NUM_DSI_CLOCKS_MAX      6
  15 #define MAX_DSI_PLL_EN_SEQS     10
  16
  17 struct msm_dsi_pll {
  18         enum msm_dsi_phy_type type;
  19
  20         struct clk_hw   clk_hw;
  21         bool            pll_on;
  22         bool            state_saved;
  23
  24         unsigned long   min_rate;
  25         unsigned long   max_rate;
  26         u32             en_seq_cnt;
  27
  28         int (*enable_seqs[MAX_DSI_PLL_EN_SEQS])(struct msm_dsi_pll *pll);
  29         void (*disable_seq)(struct msm_dsi_pll *pll);
  30         int (*get_provider)(struct msm_dsi_pll *pll,
  31                         struct clk **byte_clk_provider,
  32                         struct clk **pixel_clk_provider);
  33         void (*destroy)(struct msm_dsi_pll *pll);
  34         void (*save_state)(struct msm_dsi_pll *pll);
  35         int (*restore_state)(struct msm_dsi_pll *pll);
  36         int (*set_usecase)(struct msm_dsi_pll *pll,
  37                            enum msm_dsi_phy_usecase uc);
  38 };
  39
  40 #define hw_clk_to_pll(x) container_of(x, struct msm_dsi_pll, clk_hw)
  41
  42 static inline void pll_write(void __iomem *reg, u32 data)
  43 {
  44         msm_writel(data, reg);
  45 }
  46
  47 static inline u32 pll_read(const void __iomem *reg)
  48 {
  49         return msm_readl(reg);
  50 }
  51
  52 static inline void pll_write_udelay(void __iomem *reg, u32 data, u32 delay_us)
  53 {
  54         pll_write(reg, data);
  55         udelay(delay_us);
  56 }
  57
  58 static inline void pll_write_ndelay(void __iomem *reg, u32 data, u32 delay_ns)
  59 {
  60         pll_write((reg), data);
  61         ndelay(delay_ns);
  62 }
  63
  64 /*
  65  * DSI PLL Helper functions
  66  */
  67
  68 /* clock callbacks */
  69 long msm_dsi_pll_helper_clk_round_rate(struct clk_hw *hw,
  70                 unsigned long rate, unsigned long *parent_rate);
  71 int msm_dsi_pll_helper_clk_prepare(struct clk_hw *hw);
  72 void msm_dsi_pll_helper_clk_unprepare(struct clk_hw *hw);
  73 /* misc */
  74 void msm_dsi_pll_helper_unregister_clks(struct platform_device *pdev,
  75                                         struct clk **clks, u32 num_clks);
  76
  77 /*
  78  * Initialization for Each PLL Type
  79  */
  80 #ifdef CONFIG_DRM_MSM_DSI_28NM_PHY
  81 struct msm_dsi_pll *msm_dsi_pll_28nm_init(struct platform_device *pdev,
  82                                         enum msm_dsi_phy_type type, int id);
  83 #else
  84 static inline struct msm_dsi_pll *msm_dsi_pll_28nm_init(
  85         struct platform_device *pdev, enum msm_dsi_phy_type type, int id)
  86 {
  87         return ERR_PTR(-ENODEV);
  88 }
  89 #endif
  90 #ifdef CONFIG_DRM_MSM_DSI_28NM_8960_PHY
  91 struct msm_dsi_pll *msm_dsi_pll_28nm_8960_init(struct platform_device *pdev,
  92                                                int id);
  93 #else
  94 static inline struct msm_dsi_pll *msm_dsi_pll_28nm_8960_init(
  95         struct platform_device *pdev, int id)
  96 {
  97         return ERR_PTR(-ENODEV);
  98 }
  99 #endif
 100
 101 #ifdef CONFIG_DRM_MSM_DSI_14NM_PHY
 102 struct msm_dsi_pll *msm_dsi_pll_14nm_init(struct platform_device *pdev, int id);
 103 #else
 104 static inline struct msm_dsi_pll *
 105 msm_dsi_pll_14nm_init(struct platform_device *pdev, int id)
 106 {
 107         return ERR_PTR(-ENODEV);
 108 }
 109 #endif
 110 #ifdef CONFIG_DRM_MSM_DSI_10NM_PHY
 111 struct msm_dsi_pll *msm_dsi_pll_10nm_init(struct platform_device *pdev, int id);
 112 #else
 113 static inline struct msm_dsi_pll *
 114 msm_dsi_pll_10nm_init(struct platform_device *pdev, int id)
 115 {
 116         return ERR_PTR(-ENODEV);
 117 }
 118 #endif
 119 #ifdef CONFIG_DRM_MSM_DSI_7NM_PHY
 120 struct msm_dsi_pll *msm_dsi_pll_7nm_init(struct platform_device *pdev, int id);
 121 #else
 122 static inline struct msm_dsi_pll *
 123 msm_dsi_pll_7nm_init(struct platform_device *pdev, int id)
 124 {
 125         return ERR_PTR(-ENODEV);
 126 }
 127 #endif
 128
 129 #endif /* __DSI_PLL_H__ */
 130