drivers/gpu/drm/msm/hdmi/hdmi.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Copyright (C) 2013 Red Hat
   4  * Author: Rob Clark <robdclark@gmail.com>
   5  */
   6
   7 #ifndef __HDMI_CONNECTOR_H__
   8 #define __HDMI_CONNECTOR_H__
   9
  10 #include <linux/i2c.h>
  11 #include <linux/clk.h>
  12 #include <linux/platform_device.h>
  13 #include <linux/regulator/consumer.h>
  14 #include <linux/gpio/consumer.h>
  15 #include <linux/hdmi.h>
  16
  17 #include <drm/drm_bridge.h>
  18
  19 #include "msm_drv.h"
  20 #include "hdmi.xml.h"
  21
  22 #define HDMI_MAX_NUM_GPIO       6
  23
  24 struct hdmi_phy;
  25 struct hdmi_platform_config;
  26
  27 struct hdmi_gpio_data {
  28         struct gpio_desc *gpiod;
  29         bool output;
  30         int value;
  31 };
  32
  33 struct hdmi_audio {
  34         bool enabled;
  35         struct hdmi_audio_infoframe infoframe;
  36         int rate;
  37 };
  38
  39 struct hdmi_hdcp_ctrl;
  40
  41 struct hdmi {
  42         struct drm_device *dev;
  43         struct platform_device *pdev;
  44         struct platform_device *audio_pdev;
  45
  46         const struct hdmi_platform_config *config;
  47
  48         /* audio state: */
  49         struct hdmi_audio audio;
  50
  51         /* video state: */
  52         bool power_on;
  53         unsigned long int pixclock;
  54
  55         void __iomem *mmio;
  56         void __iomem *qfprom_mmio;
  57         phys_addr_t mmio_phy_addr;
  58
  59         struct regulator **hpd_regs;
  60         struct regulator **pwr_regs;
  61         struct clk **hpd_clks;
  62         struct clk **pwr_clks;
  63
  64         struct hdmi_phy *phy;
  65         struct device *phy_dev;
  66
  67         struct i2c_adapter *i2c;
  68         struct drm_connector *connector;
  69         struct drm_bridge *bridge;
  70
  71         /* the encoder we are hooked to (outside of hdmi block) */
  72         struct drm_encoder *encoder;
  73
  74         bool hdmi_mode;               /* are we in hdmi mode? */
  75
  76         int irq;
  77         struct workqueue_struct *workq;
  78
  79         struct hdmi_hdcp_ctrl *hdcp_ctrl;
  80
  81         /*
  82         * spinlock to protect registers shared by different execution
  83         * REG_HDMI_CTRL
  84         * REG_HDMI_DDC_ARBITRATION
  85         * REG_HDMI_HDCP_INT_CTRL
  86         * REG_HDMI_HPD_CTRL
  87         */
  88         spinlock_t reg_lock;
  89 };
  90
  91 /* platform config data (ie. from DT, or pdata) */
  92 struct hdmi_platform_config {
  93         const char *mmio_name;
  94         const char *qfprom_mmio_name;
  95
  96         /* regulators that need to be on for hpd: */
  97         const char **hpd_reg_names;
  98         int hpd_reg_cnt;
  99
 100         /* regulators that need to be on for screen pwr: */
 101         const char **pwr_reg_names;
 102         int pwr_reg_cnt;
 103
 104         /* clks that need to be on for hpd: */
 105         const char **hpd_clk_names;
 106         const long unsigned *hpd_freq;
 107         int hpd_clk_cnt;
 108
 109         /* clks that need to be on for screen pwr (ie pixel clk): */
 110         const char **pwr_clk_names;
 111         int pwr_clk_cnt;
 112
 113         /* gpio's: */
 114         struct hdmi_gpio_data gpios[HDMI_MAX_NUM_GPIO];
 115 };
 116
 117 void msm_hdmi_set_mode(struct hdmi *hdmi, bool power_on);
 118
 119 static inline void hdmi_write(struct hdmi *hdmi, u32 reg, u32 data)
 120 {
 121         msm_writel(data, hdmi->mmio + reg);
 122 }
 123
 124 static inline u32 hdmi_read(struct hdmi *hdmi, u32 reg)
 125 {
 126         return msm_readl(hdmi->mmio + reg);
 127 }
 128
 129 static inline u32 hdmi_qfprom_read(struct hdmi *hdmi, u32 reg)
 130 {
 131         return msm_readl(hdmi->qfprom_mmio + reg);
 132 }
 133
 134 /*
 135  * hdmi phy:
 136  */
 137
 138 enum hdmi_phy_type {
 139         MSM_HDMI_PHY_8x60,
 140         MSM_HDMI_PHY_8960,
 141         MSM_HDMI_PHY_8x74,
 142         MSM_HDMI_PHY_8996,
 143         MSM_HDMI_PHY_MAX,
 144 };
 145
 146 struct hdmi_phy_cfg {
 147         enum hdmi_phy_type type;
 148         void (*powerup)(struct hdmi_phy *phy, unsigned long int pixclock);
 149         void (*powerdown)(struct hdmi_phy *phy);
 150         const char * const *reg_names;
 151         int num_regs;
 152         const char * const *clk_names;
 153         int num_clks;
 154 };
 155
 156 extern const struct hdmi_phy_cfg msm_hdmi_phy_8x60_cfg;
 157 extern const struct hdmi_phy_cfg msm_hdmi_phy_8960_cfg;
 158 extern const struct hdmi_phy_cfg msm_hdmi_phy_8x74_cfg;
 159 extern const struct hdmi_phy_cfg msm_hdmi_phy_8996_cfg;
 160
 161 struct hdmi_phy {
 162         struct platform_device *pdev;
 163         void __iomem *mmio;
 164         struct hdmi_phy_cfg *cfg;
 165         const struct hdmi_phy_funcs *funcs;
 166         struct regulator **regs;
 167         struct clk **clks;
 168 };
 169
 170 static inline void hdmi_phy_write(struct hdmi_phy *phy, u32 reg, u32 data)
 171 {
 172         msm_writel(data, phy->mmio + reg);
 173 }
 174
 175 static inline u32 hdmi_phy_read(struct hdmi_phy *phy, u32 reg)
 176 {
 177         return msm_readl(phy->mmio + reg);
 178 }
 179
 180 int msm_hdmi_phy_resource_enable(struct hdmi_phy *phy);
 181 void msm_hdmi_phy_resource_disable(struct hdmi_phy *phy);
 182 void msm_hdmi_phy_powerup(struct hdmi_phy *phy, unsigned long int pixclock);
 183 void msm_hdmi_phy_powerdown(struct hdmi_phy *phy);
 184 void __init msm_hdmi_phy_driver_register(void);
 185 void __exit msm_hdmi_phy_driver_unregister(void);
 186
 187 #ifdef CONFIG_COMMON_CLK
 188 int msm_hdmi_pll_8960_init(struct platform_device *pdev);
 189 int msm_hdmi_pll_8996_init(struct platform_device *pdev);
 190 #else
 191 static inline int msm_hdmi_pll_8960_init(struct platform_device *pdev)
 192 {
 193         return -ENODEV;
 194 }
 195
 196 static inline int msm_hdmi_pll_8996_init(struct platform_device *pdev)
 197 {
 198         return -ENODEV;
 199 }
 200 #endif
 201
 202 /*
 203  * audio:
 204  */
 205 /* Supported HDMI Audio channels and rates */
 206 #define MSM_HDMI_AUDIO_CHANNEL_2        0
 207 #define MSM_HDMI_AUDIO_CHANNEL_4        1
 208 #define MSM_HDMI_AUDIO_CHANNEL_6        2
 209 #define MSM_HDMI_AUDIO_CHANNEL_8        3
 210
 211 #define HDMI_SAMPLE_RATE_32KHZ          0
 212 #define HDMI_SAMPLE_RATE_44_1KHZ        1
 213 #define HDMI_SAMPLE_RATE_48KHZ          2
 214 #define HDMI_SAMPLE_RATE_88_2KHZ        3
 215 #define HDMI_SAMPLE_RATE_96KHZ          4
 216 #define HDMI_SAMPLE_RATE_176_4KHZ       5
 217 #define HDMI_SAMPLE_RATE_192KHZ         6
 218
 219 int msm_hdmi_audio_update(struct hdmi *hdmi);
 220 int msm_hdmi_audio_info_setup(struct hdmi *hdmi, bool enabled,
 221         uint32_t num_of_channels, uint32_t channel_allocation,
 222         uint32_t level_shift, bool down_mix);
 223 void msm_hdmi_audio_set_sample_rate(struct hdmi *hdmi, int rate);
 224
 225
 226 /*
 227  * hdmi bridge:
 228  */
 229
 230 struct drm_bridge *msm_hdmi_bridge_init(struct hdmi *hdmi);
 231 void msm_hdmi_bridge_destroy(struct drm_bridge *bridge);
 232
 233 /*
 234  * hdmi connector:
 235  */
 236
 237 void msm_hdmi_connector_irq(struct drm_connector *connector);
 238 struct drm_connector *msm_hdmi_connector_init(struct hdmi *hdmi);
 239 int msm_hdmi_hpd_enable(struct drm_connector *connector);
 240
 241 /*
 242  * i2c adapter for ddc:
 243  */
 244
 245 void msm_hdmi_i2c_irq(struct i2c_adapter *i2c);
 246 void msm_hdmi_i2c_destroy(struct i2c_adapter *i2c);
 247 struct i2c_adapter *msm_hdmi_i2c_init(struct hdmi *hdmi);
 248
 249 /*
 250  * hdcp
 251  */
 252 #ifdef CONFIG_DRM_MSM_HDMI_HDCP
 253 struct hdmi_hdcp_ctrl *msm_hdmi_hdcp_init(struct hdmi *hdmi);
 254 void msm_hdmi_hdcp_destroy(struct hdmi *hdmi);
 255 void msm_hdmi_hdcp_on(struct hdmi_hdcp_ctrl *hdcp_ctrl);
 256 void msm_hdmi_hdcp_off(struct hdmi_hdcp_ctrl *hdcp_ctrl);
 257 void msm_hdmi_hdcp_irq(struct hdmi_hdcp_ctrl *hdcp_ctrl);
 258 #else
 259 static inline struct hdmi_hdcp_ctrl *msm_hdmi_hdcp_init(struct hdmi *hdmi)
 260 {
 261         return ERR_PTR(-ENXIO);
 262 }
 263 static inline void msm_hdmi_hdcp_destroy(struct hdmi *hdmi) {}
 264 static inline void msm_hdmi_hdcp_on(struct hdmi_hdcp_ctrl *hdcp_ctrl) {}
 265 static inline void msm_hdmi_hdcp_off(struct hdmi_hdcp_ctrl *hdcp_ctrl) {}
 266 static inline void msm_hdmi_hdcp_irq(struct hdmi_hdcp_ctrl *hdcp_ctrl) {}
 267 #endif
 268
 269 #endif /* __HDMI_CONNECTOR_H__ */