xref: /linux/drivers/gpu/drm/msm/hdmi/hdmi.h (revision c4ee0af3fa0dc65f690fc908f02b8355f9576ea0)
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 
26 #include "msm_drv.h"
27 #include "hdmi.xml.h"
28 
29 
30 struct hdmi_phy;
31 
32 struct hdmi {
33 	struct kref refcount;
34 
35 	struct drm_device *dev;
36 	struct platform_device *pdev;
37 
38 	void __iomem *mmio;
39 
40 	struct regulator *mvs;        /* HDMI_5V */
41 	struct regulator *mpp0;       /* External 5V */
42 
43 	struct clk *clk;
44 	struct clk *m_pclk;
45 	struct clk *s_pclk;
46 
47 	struct hdmi_phy *phy;
48 	struct i2c_adapter *i2c;
49 	struct drm_connector *connector;
50 	struct drm_bridge *bridge;
51 
52 	/* the encoder we are hooked to (outside of hdmi block) */
53 	struct drm_encoder *encoder;
54 
55 	bool hdmi_mode;               /* are we in hdmi mode? */
56 
57 	int irq;
58 };
59 
60 /* platform config data (ie. from DT, or pdata) */
61 struct hdmi_platform_config {
62 	struct hdmi_phy *(*phy_init)(struct hdmi *hdmi);
63 	int ddc_clk_gpio, ddc_data_gpio, hpd_gpio, pmic_gpio;
64 };
65 
66 void hdmi_set_mode(struct hdmi *hdmi, bool power_on);
67 void hdmi_destroy(struct kref *kref);
68 
69 static inline void hdmi_write(struct hdmi *hdmi, u32 reg, u32 data)
70 {
71 	msm_writel(data, hdmi->mmio + reg);
72 }
73 
74 static inline u32 hdmi_read(struct hdmi *hdmi, u32 reg)
75 {
76 	return msm_readl(hdmi->mmio + reg);
77 }
78 
79 static inline struct hdmi * hdmi_reference(struct hdmi *hdmi)
80 {
81 	kref_get(&hdmi->refcount);
82 	return hdmi;
83 }
84 
85 static inline void hdmi_unreference(struct hdmi *hdmi)
86 {
87 	kref_put(&hdmi->refcount, hdmi_destroy);
88 }
89 
90 /*
91  * The phy appears to be different, for example between 8960 and 8x60,
92  * so split the phy related functions out and load the correct one at
93  * runtime:
94  */
95 
96 struct hdmi_phy_funcs {
97 	void (*destroy)(struct hdmi_phy *phy);
98 	void (*reset)(struct hdmi_phy *phy);
99 	void (*powerup)(struct hdmi_phy *phy, unsigned long int pixclock);
100 	void (*powerdown)(struct hdmi_phy *phy);
101 };
102 
103 struct hdmi_phy {
104 	const struct hdmi_phy_funcs *funcs;
105 };
106 
107 struct hdmi_phy *hdmi_phy_8960_init(struct hdmi *hdmi);
108 struct hdmi_phy *hdmi_phy_8x60_init(struct hdmi *hdmi);
109 
110 /*
111  * hdmi bridge:
112  */
113 
114 struct drm_bridge *hdmi_bridge_init(struct hdmi *hdmi);
115 
116 /*
117  * hdmi connector:
118  */
119 
120 void hdmi_connector_irq(struct drm_connector *connector);
121 struct drm_connector *hdmi_connector_init(struct hdmi *hdmi);
122 
123 /*
124  * i2c adapter for ddc:
125  */
126 
127 void hdmi_i2c_irq(struct i2c_adapter *i2c);
128 void hdmi_i2c_destroy(struct i2c_adapter *i2c);
129 struct i2c_adapter *hdmi_i2c_init(struct hdmi *hdmi);
130 
131 #endif /* __HDMI_CONNECTOR_H__ */
132