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e5d464d02f
Add tables to map the GMBUS pin pairs to GPIO registers and port to DDC. From spec we have registers GPIO_CTL[1-5] mapped to native display phys and GPIO_CTL[9-12] are mapped to TC ports. v2: - Drop unused GPIO pins(MattR) BSpec: 49306 Cc: Matt Roper <matthew.d.roper@intel.com> Original Author: Brian J Lovin Signed-off-by: Radhakrishna Sripada <radhakrishna.sripada@intel.com> Reviewed-by: Balasubramani Vivekanandan <balasubramani.vivekanandan@intel.com> Reviewed-by: Matt Roper <matthew.d.roper@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220902060342.151824-6-radhakrishna.sripada@intel.com
49 lines
1.5 KiB
C
49 lines
1.5 KiB
C
/* SPDX-License-Identifier: MIT */
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/*
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* Copyright © 2019 Intel Corporation
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*/
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#ifndef __INTEL_GMBUS_H__
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#define __INTEL_GMBUS_H__
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#include <linux/types.h>
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struct drm_i915_private;
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struct i2c_adapter;
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#define GMBUS_PIN_DISABLED 0
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#define GMBUS_PIN_SSC 1
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#define GMBUS_PIN_VGADDC 2
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#define GMBUS_PIN_PANEL 3
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#define GMBUS_PIN_DPD_CHV 3 /* HDMID_CHV */
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#define GMBUS_PIN_DPC 4 /* HDMIC */
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#define GMBUS_PIN_DPB 5 /* SDVO, HDMIB */
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#define GMBUS_PIN_DPD 6 /* HDMID */
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#define GMBUS_PIN_RESERVED 7 /* 7 reserved */
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#define GMBUS_PIN_1_BXT 1 /* BXT+ (atom) and CNP+ (big core) */
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#define GMBUS_PIN_2_BXT 2
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#define GMBUS_PIN_3_BXT 3
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#define GMBUS_PIN_4_CNP 4
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#define GMBUS_PIN_5_MTP 5
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#define GMBUS_PIN_9_TC1_ICP 9
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#define GMBUS_PIN_10_TC2_ICP 10
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#define GMBUS_PIN_11_TC3_ICP 11
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#define GMBUS_PIN_12_TC4_ICP 12
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#define GMBUS_PIN_13_TC5_TGP 13
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#define GMBUS_PIN_14_TC6_TGP 14
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#define GMBUS_NUM_PINS 15 /* including 0 */
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int intel_gmbus_setup(struct drm_i915_private *dev_priv);
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void intel_gmbus_teardown(struct drm_i915_private *dev_priv);
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bool intel_gmbus_is_valid_pin(struct drm_i915_private *dev_priv,
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unsigned int pin);
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int intel_gmbus_output_aksv(struct i2c_adapter *adapter);
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struct i2c_adapter *
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intel_gmbus_get_adapter(struct drm_i915_private *dev_priv, unsigned int pin);
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void intel_gmbus_force_bit(struct i2c_adapter *adapter, bool force_bit);
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bool intel_gmbus_is_forced_bit(struct i2c_adapter *adapter);
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void intel_gmbus_reset(struct drm_i915_private *dev_priv);
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#endif /* __INTEL_GMBUS_H__ */
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