drivers/gpu/drm/i915/display/intel_gmbus.h

   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_9_TC1_ICP     9
  28 #define GMBUS_PIN_10_TC2_ICP    10
  29 #define GMBUS_PIN_11_TC3_ICP    11
  30 #define GMBUS_PIN_12_TC4_ICP    12
  31 #define GMBUS_PIN_13_TC5_TGP    13
  32 #define GMBUS_PIN_14_TC6_TGP    14
  33
  34 #define GMBUS_NUM_PINS  15 /* including 0 */
  35
  36 int intel_gmbus_setup(struct drm_i915_private *dev_priv);
  37 void intel_gmbus_teardown(struct drm_i915_private *dev_priv);
  38 bool intel_gmbus_is_valid_pin(struct drm_i915_private *dev_priv,
  39                               unsigned int pin);
  40 int intel_gmbus_output_aksv(struct i2c_adapter *adapter);
  41
  42 struct i2c_adapter *
  43 intel_gmbus_get_adapter(struct drm_i915_private *dev_priv, unsigned int pin);
  44 void intel_gmbus_set_speed(struct i2c_adapter *adapter, int speed);
  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 #endif /* __INTEL_GMBUS_H__ */