xref: /linux/drivers/gpu/drm/i915/display/intel_gmbus.h (revision cdd5b5a9761fd66d17586e4f4ba6588c70e640ea)
1 /* SPDX-License-Identifier: MIT */
2 /*
3  * Copyright © 2019 Intel Corporation
4  */
5 
6 #ifndef __INTEL_GMBUS_H__
7 #define __INTEL_GMBUS_H__
8 
9 #include <linux/types.h>
10 
11 struct drm_i915_private;
12 struct i2c_adapter;
13 
14 #define GMBUS_PIN_DISABLED	0
15 #define GMBUS_PIN_SSC		1
16 #define GMBUS_PIN_VGADDC	2
17 #define GMBUS_PIN_PANEL		3
18 #define GMBUS_PIN_DPD_CHV	3 /* HDMID_CHV */
19 #define GMBUS_PIN_DPC		4 /* HDMIC */
20 #define GMBUS_PIN_DPB		5 /* SDVO, HDMIB */
21 #define GMBUS_PIN_DPD		6 /* HDMID */
22 #define GMBUS_PIN_RESERVED	7 /* 7 reserved */
23 #define GMBUS_PIN_1_BXT		1 /* BXT+ (atom) and CNP+ (big core) */
24 #define GMBUS_PIN_2_BXT		2
25 #define GMBUS_PIN_3_BXT		3
26 #define GMBUS_PIN_4_CNP		4
27 #define GMBUS_PIN_5_MTP		5
28 #define GMBUS_PIN_9_TC1_ICP	9
29 #define GMBUS_PIN_10_TC2_ICP	10
30 #define GMBUS_PIN_11_TC3_ICP	11
31 #define GMBUS_PIN_12_TC4_ICP	12
32 #define GMBUS_PIN_13_TC5_TGP	13
33 #define GMBUS_PIN_14_TC6_TGP	14
34 
35 #define GMBUS_NUM_PINS	15 /* including 0 */
36 
37 int intel_gmbus_setup(struct drm_i915_private *dev_priv);
38 void intel_gmbus_teardown(struct drm_i915_private *dev_priv);
39 bool intel_gmbus_is_valid_pin(struct drm_i915_private *dev_priv,
40 			      unsigned int pin);
41 int intel_gmbus_output_aksv(struct i2c_adapter *adapter);
42 
43 struct i2c_adapter *
44 intel_gmbus_get_adapter(struct drm_i915_private *dev_priv, unsigned int pin);
45 void intel_gmbus_force_bit(struct i2c_adapter *adapter, bool force_bit);
46 bool intel_gmbus_is_forced_bit(struct i2c_adapter *adapter);
47 void intel_gmbus_reset(struct drm_i915_private *dev_priv);
48 
49 void intel_gmbus_irq_handler(struct drm_i915_private *i915);
50 
51 #endif /* __INTEL_GMBUS_H__ */
52