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

   1 /*
   2  * Copyright (C) 2013 Red Hat
   3  * Author: Rob Clark <robdclark@gmail.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 as published by
   7  * the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #ifndef __HDMI_CONNECTOR_H__
  19 #define __HDMI_CONNECTOR_H__
  20
  21 #include <linux/i2c.h>
  22 #include <linux/clk.h>
  23 #include <linux/platform_device.h>
  24 #include <linux/regulator/consumer.h>
  25 #include <linux/hdmi.h>
  26
  27 #include "msm_drv.h"
  28 #include "hdmi.xml.h"
  29
  30
  31 struct hdmi_phy;
  32 struct hdmi_platform_config;
  33
  34 struct hdmi_audio {
  35         bool enabled;
  36         struct hdmi_audio_infoframe infoframe;
  37         int rate;
  38 };
  39
  40 struct hdmi {
  41         struct kref refcount;
  42
  43         struct drm_device *dev;
  44         struct platform_device *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
  57         struct regulator *hpd_regs[2];
  58         struct regulator *pwr_regs[2];
  59         struct clk *hpd_clks[3];
  60         struct clk *pwr_clks[2];
  61
  62         struct hdmi_phy *phy;
  63         struct i2c_adapter *i2c;
  64         struct drm_connector *connector;
  65         struct drm_bridge *bridge;
  66
  67         /* the encoder we are hooked to (outside of hdmi block) */
  68         struct drm_encoder *encoder;
  69
  70         bool hdmi_mode;               /* are we in hdmi mode? */
  71
  72         int irq;
  73 };
  74
  75 /* platform config data (ie. from DT, or pdata) */
  76 struct hdmi_platform_config {
  77         struct hdmi_phy *(*phy_init)(struct hdmi *hdmi);
  78         const char *mmio_name;
  79
  80         /* regulators that need to be on for hpd: */
  81         const char **hpd_reg_names;
  82         int hpd_reg_cnt;
  83
  84         /* regulators that need to be on for screen pwr: */
  85         const char **pwr_reg_names;
  86         int pwr_reg_cnt;
  87
  88         /* clks that need to be on for hpd: */
  89         const char **hpd_clk_names;
  90         const long unsigned *hpd_freq;
  91         int hpd_clk_cnt;
  92
  93         /* clks that need to be on for screen pwr (ie pixel clk): */
  94         const char **pwr_clk_names;
  95         int pwr_clk_cnt;
  96
  97         /* gpio's: */
  98         int ddc_clk_gpio, ddc_data_gpio, hpd_gpio, mux_en_gpio, mux_sel_gpio;
  99
 100         /* older devices had their own irq, mdp5+ it is shared w/ mdp: */
 101         bool shared_irq;
 102 };
 103
 104 void hdmi_set_mode(struct hdmi *hdmi, bool power_on);
 105 void hdmi_destroy(struct kref *kref);
 106
 107 static inline void hdmi_write(struct hdmi *hdmi, u32 reg, u32 data)
 108 {
 109         msm_writel(data, hdmi->mmio + reg);
 110 }
 111
 112 static inline u32 hdmi_read(struct hdmi *hdmi, u32 reg)
 113 {
 114         return msm_readl(hdmi->mmio + reg);
 115 }
 116
 117 static inline struct hdmi * hdmi_reference(struct hdmi *hdmi)
 118 {
 119         kref_get(&hdmi->refcount);
 120         return hdmi;
 121 }
 122
 123 static inline void hdmi_unreference(struct hdmi *hdmi)
 124 {
 125         kref_put(&hdmi->refcount, hdmi_destroy);
 126 }
 127
 128 /*
 129  * The phy appears to be different, for example between 8960 and 8x60,
 130  * so split the phy related functions out and load the correct one at
 131  * runtime:
 132  */
 133
 134 struct hdmi_phy_funcs {
 135         void (*destroy)(struct hdmi_phy *phy);
 136         void (*reset)(struct hdmi_phy *phy);
 137         void (*powerup)(struct hdmi_phy *phy, unsigned long int pixclock);
 138         void (*powerdown)(struct hdmi_phy *phy);
 139 };
 140
 141 struct hdmi_phy {
 142         const struct hdmi_phy_funcs *funcs;
 143 };
 144
 145 struct hdmi_phy *hdmi_phy_8960_init(struct hdmi *hdmi);
 146 struct hdmi_phy *hdmi_phy_8x60_init(struct hdmi *hdmi);
 147 struct hdmi_phy *hdmi_phy_8x74_init(struct hdmi *hdmi);
 148
 149 /*
 150  * audio:
 151  */
 152
 153 int hdmi_audio_update(struct hdmi *hdmi);
 154 int hdmi_audio_info_setup(struct hdmi *hdmi, bool enabled,
 155         uint32_t num_of_channels, uint32_t channel_allocation,
 156         uint32_t level_shift, bool down_mix);
 157 void hdmi_audio_set_sample_rate(struct hdmi *hdmi, int rate);
 158
 159
 160 /*
 161  * hdmi bridge:
 162  */
 163
 164 struct drm_bridge *hdmi_bridge_init(struct hdmi *hdmi);
 165
 166 /*
 167  * hdmi connector:
 168  */
 169
 170 void hdmi_connector_irq(struct drm_connector *connector);
 171 struct drm_connector *hdmi_connector_init(struct hdmi *hdmi);
 172
 173 /*
 174  * i2c adapter for ddc:
 175  */
 176
 177 void hdmi_i2c_irq(struct i2c_adapter *i2c);
 178 void hdmi_i2c_destroy(struct i2c_adapter *i2c);
 179 struct i2c_adapter *hdmi_i2c_init(struct hdmi *hdmi);
 180
 181 #endif /* __HDMI_CONNECTOR_H__ */