drm/amd/dc: Add dc display driver (v2)
Supported DCE versions: 8.0, 10.0, 11.0, 11.2
v2: rebase against 4.11
Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/amd/display/dc/dc.h b/drivers/gpu/drm/amd/display/dc/dc.h
new file mode 100644
index 0000000..5575484
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/dc.h
@@ -0,0 +1,780 @@
+/*
+ * Copyright 2012-14 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: AMD
+ *
+ */
+
+#ifndef DC_INTERFACE_H_
+#define DC_INTERFACE_H_
+
+#include "dc_types.h"
+#include "dpcd_defs.h"
+#include "grph_object_defs.h"
+#include "logger_types.h"
+#include "gpio_types.h"
+#include "link_service_types.h"
+
+#define MAX_TARGETS 6
+#define MAX_SURFACES 6
+#define MAX_SINKS_PER_LINK 4
+
+/*******************************************************************************
+ * Display Core Interfaces
+ ******************************************************************************/
+
+struct dc_caps {
+ uint32_t max_targets;
+ uint32_t max_links;
+ uint32_t max_audios;
+ uint32_t max_slave_planes;
+ uint32_t max_downscale_ratio;
+ uint32_t i2c_speed_in_khz;
+};
+
+
+struct dc_dcc_surface_param {
+ enum surface_pixel_format format;
+ struct dc_size surface_size;
+ enum dc_scan_direction scan;
+};
+
+struct dc_dcc_setting {
+ unsigned int max_compressed_blk_size;
+ unsigned int max_uncompressed_blk_size;
+ bool independent_64b_blks;
+};
+
+struct dc_surface_dcc_cap {
+ bool capable;
+ bool const_color_support;
+
+ union {
+ struct {
+ struct dc_dcc_setting rgb;
+ } grph;
+
+ struct {
+ struct dc_dcc_setting luma;
+ struct dc_dcc_setting chroma;
+ } video;
+ };
+};
+
+/* Forward declaration*/
+struct dc;
+struct dc_surface;
+struct validate_context;
+
+struct dc_cap_funcs {
+ int i;
+};
+
+struct dc_stream_funcs {
+ bool (*adjust_vmin_vmax)(struct dc *dc,
+ const struct dc_stream **stream,
+ int num_streams,
+ int vmin,
+ int vmax);
+
+ void (*stream_update_scaling)(const struct dc *dc,
+ const struct dc_stream *dc_stream,
+ const struct rect *src,
+ const struct rect *dst);
+ bool (*set_gamut_remap)(struct dc *dc,
+ const struct dc_stream **stream, int num_streams);
+ bool (*set_backlight)(struct dc *dc, unsigned int backlight_level,
+ unsigned int frame_ramp, const struct dc_stream *stream);
+ bool (*init_dmcu_backlight_settings)(struct dc *dc);
+ bool (*set_abm_level)(struct dc *dc, unsigned int abm_level);
+ bool (*set_psr_enable)(struct dc *dc, bool enable);
+ bool (*setup_psr)(struct dc *dc, const struct dc_stream *stream);
+};
+
+struct link_training_settings;
+
+struct dc_link_funcs {
+ void (*set_drive_settings)(struct dc *dc,
+ struct link_training_settings *lt_settings);
+ void (*perform_link_training)(struct dc *dc,
+ struct dc_link_settings *link_setting,
+ bool skip_video_pattern);
+ void (*set_preferred_link_settings)(struct dc *dc,
+ struct dc_link_settings *link_setting);
+ void (*enable_hpd)(const struct dc_link *link);
+ void (*disable_hpd)(const struct dc_link *link);
+ void (*set_test_pattern)(
+ const struct dc_link *link,
+ enum dp_test_pattern test_pattern,
+ const struct link_training_settings *p_link_settings,
+ const unsigned char *p_custom_pattern,
+ unsigned int cust_pattern_size);
+};
+
+/* Structure to hold configuration flags set by dm at dc creation. */
+struct dc_config {
+ bool gpu_vm_support;
+ bool disable_disp_pll_sharing;
+};
+
+struct dc_debug {
+ bool surface_visual_confirm;
+ bool max_disp_clk;
+ bool target_trace;
+ bool surface_trace;
+ bool validation_trace;
+ bool disable_stutter;
+ bool disable_dcc;
+ bool disable_dfs_bypass;
+ bool disable_power_gate;
+ bool disable_clock_gate;
+};
+
+struct dc {
+ struct dc_caps caps;
+ struct dc_cap_funcs cap_funcs;
+ struct dc_stream_funcs stream_funcs;
+ struct dc_link_funcs link_funcs;
+ struct dc_config config;
+ struct dc_debug debug;
+};
+
+enum frame_buffer_mode {
+ FRAME_BUFFER_MODE_LOCAL_ONLY = 0,
+ FRAME_BUFFER_MODE_ZFB_ONLY,
+ FRAME_BUFFER_MODE_MIXED_ZFB_AND_LOCAL,
+} ;
+
+struct dchub_init_data {
+ bool dchub_initialzied;
+ bool dchub_info_valid;
+ int64_t zfb_phys_addr_base;
+ int64_t zfb_mc_base_addr;
+ uint64_t zfb_size_in_byte;
+ enum frame_buffer_mode fb_mode;
+};
+
+struct dc_init_data {
+ struct hw_asic_id asic_id;
+ void *driver; /* ctx */
+ struct cgs_device *cgs_device;
+
+ int num_virtual_links;
+ /*
+ * If 'vbios_override' not NULL, it will be called instead
+ * of the real VBIOS. Intended use is Diagnostics on FPGA.
+ */
+ struct dc_bios *vbios_override;
+ enum dce_environment dce_environment;
+
+ struct dc_config flags;
+};
+
+struct dc *dc_create(const struct dc_init_data *init_params);
+
+void dc_destroy(struct dc **dc);
+
+bool dc_init_dchub(struct dc *dc, struct dchub_init_data *dh_data);
+
+/*******************************************************************************
+ * Surface Interfaces
+ ******************************************************************************/
+
+enum {
+ RGB_256X3X16 = 256,
+ FLOAT_GAMMA_RAMP_MAX = 1025
+};
+
+enum dc_gamma_ramp_type {
+ GAMMA_RAMP_RBG256X3X16,
+ GAMMA_RAMP_FLOAT,
+};
+
+struct float_rgb {
+ struct fixed32_32 red;
+ struct fixed32_32 green;
+ struct fixed32_32 blue;
+};
+
+struct dc_gamma_ramp_float {
+ struct float_rgb scale;
+ struct float_rgb offset;
+ struct float_rgb gamma_curve[FLOAT_GAMMA_RAMP_MAX];
+};
+
+struct dc_gamma_ramp_rgb256x3x16 {
+ uint16_t red[RGB_256X3X16];
+ uint16_t green[RGB_256X3X16];
+ uint16_t blue[RGB_256X3X16];
+};
+
+struct dc_gamma {
+ enum dc_gamma_ramp_type type;
+ union {
+ struct dc_gamma_ramp_rgb256x3x16 gamma_ramp_rgb256x3x16;
+ struct dc_gamma_ramp_float gamma_ramp_float;
+ };
+ uint32_t size;
+};
+
+struct dc_surface {
+ bool visible;
+ bool flip_immediate;
+ struct dc_plane_address address;
+
+ struct scaling_taps scaling_quality;
+ struct rect src_rect;
+ struct rect dst_rect;
+ struct rect clip_rect;
+
+ union plane_size plane_size;
+ union dc_tiling_info tiling_info;
+ struct dc_plane_dcc_param dcc;
+ enum dc_color_space color_space;
+
+ enum surface_pixel_format format;
+ enum dc_rotation_angle rotation;
+ bool horizontal_mirror;
+ enum plane_stereo_format stereo_format;
+
+ const struct dc_gamma *gamma_correction;
+};
+
+struct dc_plane_info {
+ union plane_size plane_size;
+ union dc_tiling_info tiling_info;
+ enum surface_pixel_format format;
+ enum dc_rotation_angle rotation;
+ bool horizontal_mirror;
+ enum plane_stereo_format stereo_format;
+ enum dc_color_space color_space; /*todo: wrong place, fits in scaling info*/
+ bool visible;
+};
+
+struct dc_scaling_info {
+ struct rect src_rect;
+ struct rect dst_rect;
+ struct rect clip_rect;
+ struct scaling_taps scaling_quality;
+};
+
+struct dc_surface_update {
+ const struct dc_surface *surface;
+
+ /* isr safe update parameters. null means no updates */
+ struct dc_flip_addrs *flip_addr;
+ struct dc_plane_info *plane_info;
+ struct dc_scaling_info *scaling_info;
+ /* following updates require alloc/sleep/spin that is not isr safe,
+ * null means no updates
+ */
+ struct dc_gamma *gamma;
+
+
+};
+/*
+ * This structure is filled in by dc_surface_get_status and contains
+ * the last requested address and the currently active address so the called
+ * can determine if there are any outstanding flips
+ */
+struct dc_surface_status {
+ struct dc_plane_address requested_address;
+ struct dc_plane_address current_address;
+ bool is_flip_pending;
+};
+
+/*
+ * Create a new surface with default parameters;
+ */
+struct dc_surface *dc_create_surface(const struct dc *dc);
+const struct dc_surface_status *dc_surface_get_status(
+ const struct dc_surface *dc_surface);
+
+void dc_surface_retain(const struct dc_surface *dc_surface);
+void dc_surface_release(const struct dc_surface *dc_surface);
+
+void dc_gamma_release(const struct dc_gamma *dc_gamma);
+struct dc_gamma *dc_create_gamma(void);
+
+/*
+ * This structure holds a surface address. There could be multiple addresses
+ * in cases such as Stereo 3D, Planar YUV, etc. Other per-flip attributes such
+ * as frame durations and DCC format can also be set.
+ */
+struct dc_flip_addrs {
+ struct dc_plane_address address;
+ bool flip_immediate;
+ /* TODO: DCC format info */
+ /* TODO: add flip duration for FreeSync */
+};
+
+/*
+ * Optimized flip address update function.
+ *
+ * After this call:
+ * Surface addresses and flip attributes are programmed.
+ * Surface flip occur at next configured time (h_sync or v_sync flip)
+ */
+void dc_flip_surface_addrs(struct dc *dc,
+ const struct dc_surface *const surfaces[],
+ struct dc_flip_addrs flip_addrs[],
+ uint32_t count);
+
+/*
+ * Set up surface attributes and associate to a target
+ * The surfaces parameter is an absolute set of all surface active for the target.
+ * If no surfaces are provided, the target will be blanked; no memory read.
+ * Any flip related attribute changes must be done through this interface.
+ *
+ * After this call:
+ * Surfaces attributes are programmed and configured to be composed into target.
+ * This does not trigger a flip. No surface address is programmed.
+ */
+
+bool dc_commit_surfaces_to_target(
+ struct dc *dc,
+ const struct dc_surface **dc_surfaces,
+ uint8_t surface_count,
+ struct dc_target *dc_target);
+
+bool dc_pre_update_surfaces_to_target(
+ struct dc *dc,
+ const struct dc_surface *const *new_surfaces,
+ uint8_t new_surface_count,
+ struct dc_target *dc_target);
+
+bool dc_post_update_surfaces_to_target(
+ struct dc *dc);
+
+void dc_update_surfaces_for_target(struct dc *dc, struct dc_surface_update *updates,
+ int surface_count, struct dc_target *dc_target);
+
+/*******************************************************************************
+ * Target Interfaces
+ ******************************************************************************/
+#define MAX_STREAM_NUM 1
+
+struct dc_target {
+ uint8_t stream_count;
+ const struct dc_stream *streams[MAX_STREAM_NUM];
+};
+
+/*
+ * Target status is returned from dc_target_get_status in order to get the
+ * the IRQ source, current frame counter and currently attached surfaces.
+ */
+struct dc_target_status {
+ int primary_otg_inst;
+ int cur_frame_count;
+ int surface_count;
+ const struct dc_surface *surfaces[MAX_SURFACE_NUM];
+};
+
+struct dc_target *dc_create_target_for_streams(
+ struct dc_stream *dc_streams[],
+ uint8_t stream_count);
+
+/*
+ * Get the current target status.
+ */
+const struct dc_target_status *dc_target_get_status(
+ const struct dc_target* dc_target);
+
+void dc_target_retain(const struct dc_target *dc_target);
+void dc_target_release(const struct dc_target *dc_target);
+void dc_target_log(
+ const struct dc_target *dc_target,
+ struct dal_logger *dc_logger,
+ enum dc_log_type log_type);
+
+uint8_t dc_get_current_target_count(const struct dc *dc);
+struct dc_target *dc_get_target_at_index(const struct dc *dc, uint8_t i);
+
+bool dc_target_is_connected_to_sink(
+ const struct dc_target *dc_target,
+ const struct dc_sink *dc_sink);
+
+uint32_t dc_target_get_vblank_counter(const struct dc_target *dc_target);
+
+/* TODO: Return parsed values rather than direct register read
+ * This has a dependency on the caller (amdgpu_get_crtc_scanoutpos)
+ * being refactored properly to be dce-specific
+ */
+uint32_t dc_target_get_scanoutpos(
+ const struct dc_target *dc_target,
+ uint32_t *vbl,
+ uint32_t *position);
+
+/*
+ * Structure to store surface/target associations for validation
+ */
+struct dc_validation_set {
+ const struct dc_target *target;
+ const struct dc_surface *surfaces[MAX_SURFACES];
+ uint8_t surface_count;
+};
+
+/*
+ * This function takes a set of resources and checks that they are cofunctional.
+ *
+ * After this call:
+ * No hardware is programmed for call. Only validation is done.
+ */
+bool dc_validate_resources(
+ const struct dc *dc,
+ const struct dc_validation_set set[],
+ uint8_t set_count);
+
+/*
+ * This function takes a target and checks if it is guaranteed to be supported.
+ * Guaranteed means that MAX_COFUNC*target is supported.
+ *
+ * After this call:
+ * No hardware is programmed for call. Only validation is done.
+ */
+
+bool dc_validate_guaranteed(
+ const struct dc *dc,
+ const struct dc_target *dc_target);
+
+/*
+ * Set up streams and links associated to targets to drive sinks
+ * The targets parameter is an absolute set of all active targets.
+ *
+ * After this call:
+ * Phy, Encoder, Timing Generator are programmed and enabled.
+ * New targets are enabled with blank stream; no memory read.
+ */
+bool dc_commit_targets(
+ struct dc *dc,
+ struct dc_target *targets[],
+ uint8_t target_count);
+
+/*******************************************************************************
+ * Stream Interfaces
+ ******************************************************************************/
+struct dc_stream {
+ const struct dc_sink *sink;
+ struct dc_crtc_timing timing;
+
+ enum dc_color_space output_color_space;
+
+ struct rect src; /* viewport in target space*/
+ struct rect dst; /* stream addressable area */
+
+ struct audio_info audio_info;
+
+ bool ignore_msa_timing_param;
+
+ struct freesync_context freesync_ctx;
+
+ /* TODO: dithering */
+ /* TODO: transfer function (CSC/regamma/gamut remap) */
+ struct colorspace_transform gamut_remap_matrix;
+ struct csc_transform csc_color_matrix;
+ /* TODO: custom INFO packets */
+ /* TODO: ABM info (DMCU) */
+ /* TODO: PSR info */
+ /* TODO: CEA VIC */
+};
+
+/**
+ * Create a new default stream for the requested sink
+ */
+struct dc_stream *dc_create_stream_for_sink(const struct dc_sink *dc_sink);
+
+void dc_stream_retain(const struct dc_stream *dc_stream);
+void dc_stream_release(const struct dc_stream *dc_stream);
+
+struct dc_stream_status {
+ /*
+ * link this stream passes through
+ */
+ const struct dc_link *link;
+};
+
+const struct dc_stream_status *dc_stream_get_status(
+ const struct dc_stream *dc_stream);
+
+/*******************************************************************************
+ * Link Interfaces
+ ******************************************************************************/
+
+/*
+ * A link contains one or more sinks and their connected status.
+ * The currently active signal type (HDMI, DP-SST, DP-MST) is also reported.
+ */
+struct dc_link {
+ const struct dc_sink *remote_sinks[MAX_SINKS_PER_LINK];
+ unsigned int sink_count;
+ const struct dc_sink *local_sink;
+ unsigned int link_index;
+ enum dc_connection_type type;
+ enum signal_type connector_signal;
+ enum dc_irq_source irq_source_hpd;
+ enum dc_irq_source irq_source_hpd_rx;/* aka DP Short Pulse */
+ /* caps is the same as reported_link_cap. link_traing use
+ * reported_link_cap. Will clean up. TODO
+ */
+ struct dc_link_settings reported_link_cap;
+ struct dc_link_settings verified_link_cap;
+ struct dc_link_settings max_link_setting;
+ struct dc_link_settings cur_link_settings;
+ struct dc_lane_settings cur_lane_setting;
+
+ uint8_t ddc_hw_inst;
+ uint8_t link_enc_hw_inst;
+
+ struct psr_caps psr_caps;
+ bool test_pattern_enabled;
+ union compliance_test_state compliance_test_state;
+};
+
+struct dpcd_caps {
+ union dpcd_rev dpcd_rev;
+ union max_lane_count max_ln_count;
+ union max_down_spread max_down_spread;
+
+ /* dongle type (DP converter, CV smart dongle) */
+ enum display_dongle_type dongle_type;
+ /* Dongle's downstream count. */
+ union sink_count sink_count;
+ /* If dongle_type == DISPLAY_DONGLE_DP_HDMI_CONVERTER,
+ indicates 'Frame Sequential-to-lllFrame Pack' conversion capability.*/
+ bool is_dp_hdmi_s3d_converter;
+
+ bool allow_invalid_MSA_timing_param;
+ bool panel_mode_edp;
+ uint32_t sink_dev_id;
+ uint32_t branch_dev_id;
+ int8_t branch_dev_name[6];
+ int8_t branch_hw_revision;
+};
+
+struct dc_link_status {
+ struct dpcd_caps *dpcd_caps;
+};
+
+const struct dc_link_status *dc_link_get_status(const struct dc_link *dc_link);
+
+/*
+ * Return an enumerated dc_link. dc_link order is constant and determined at
+ * boot time. They cannot be created or destroyed.
+ * Use dc_get_caps() to get number of links.
+ */
+const struct dc_link *dc_get_link_at_index(const struct dc *dc, uint32_t link_index);
+
+/* Return id of physical connector represented by a dc_link at link_index.*/
+const struct graphics_object_id dc_get_link_id_at_index(
+ struct dc *dc, uint32_t link_index);
+
+/* Set backlight level of an embedded panel (eDP, LVDS). */
+bool dc_link_set_backlight_level(const struct dc_link *dc_link, uint32_t level,
+ uint32_t frame_ramp, const struct dc_stream *stream);
+
+bool dc_link_init_dmcu_backlight_settings(const struct dc_link *dc_link);
+
+bool dc_link_set_abm_level(const struct dc_link *dc_link, uint32_t level);
+
+bool dc_link_set_psr_enable(const struct dc_link *dc_link, bool enable);
+
+bool dc_link_setup_psr(const struct dc_link *dc_link,
+ const struct dc_stream *stream);
+
+/* Request DC to detect if there is a Panel connected.
+ * boot - If this call is during initial boot.
+ * Return false for any type of detection failure or MST detection
+ * true otherwise. True meaning further action is required (status update
+ * and OS notification).
+ */
+bool dc_link_detect(const struct dc_link *dc_link, bool boot);
+
+/* Notify DC about DP RX Interrupt (aka Short Pulse Interrupt).
+ * Return:
+ * true - Downstream port status changed. DM should call DC to do the
+ * detection.
+ * false - no change in Downstream port status. No further action required
+ * from DM. */
+bool dc_link_handle_hpd_rx_irq(const struct dc_link *dc_link);
+
+struct dc_sink_init_data;
+
+struct dc_sink *dc_link_add_remote_sink(
+ const struct dc_link *dc_link,
+ const uint8_t *edid,
+ int len,
+ struct dc_sink_init_data *init_data);
+
+void dc_link_remove_remote_sink(
+ const struct dc_link *link,
+ const struct dc_sink *sink);
+
+/* Used by diagnostics for virtual link at the moment */
+void dc_link_set_sink(const struct dc_link *link, struct dc_sink *sink);
+
+void dc_link_dp_set_drive_settings(
+ struct dc_link *link,
+ struct link_training_settings *lt_settings);
+
+bool dc_link_dp_perform_link_training(
+ struct dc_link *link,
+ const struct dc_link_settings *link_setting,
+ bool skip_video_pattern);
+
+void dc_link_dp_enable_hpd(const struct dc_link *link);
+
+void dc_link_dp_disable_hpd(const struct dc_link *link);
+
+bool dc_link_dp_set_test_pattern(
+ const struct dc_link *link,
+ enum dp_test_pattern test_pattern,
+ const struct link_training_settings *p_link_settings,
+ const unsigned char *p_custom_pattern,
+ unsigned int cust_pattern_size);
+
+/*******************************************************************************
+ * Sink Interfaces - A sink corresponds to a display output device
+ ******************************************************************************/
+
+/*
+ * The sink structure contains EDID and other display device properties
+ */
+struct dc_sink {
+ enum signal_type sink_signal;
+ struct dc_edid dc_edid; /* raw edid */
+ struct dc_edid_caps edid_caps; /* parse display caps */
+};
+
+void dc_sink_retain(const struct dc_sink *sink);
+void dc_sink_release(const struct dc_sink *sink);
+
+const struct audio **dc_get_audios(struct dc *dc);
+
+struct dc_sink_init_data {
+ enum signal_type sink_signal;
+ const struct dc_link *link;
+ uint32_t dongle_max_pix_clk;
+ bool converter_disable_audio;
+};
+
+struct dc_sink *dc_sink_create(const struct dc_sink_init_data *init_params);
+
+/*******************************************************************************
+ * Cursor interfaces - To manages the cursor within a target
+ ******************************************************************************/
+/* TODO: Deprecated once we switch to dc_set_cursor_position */
+bool dc_target_set_cursor_attributes(
+ struct dc_target *dc_target,
+ const struct dc_cursor_attributes *attributes);
+
+bool dc_target_set_cursor_position(
+ struct dc_target *dc_target,
+ const struct dc_cursor_position *position);
+
+/* Newer interfaces */
+struct dc_cursor {
+ struct dc_plane_address address;
+ struct dc_cursor_attributes attributes;
+};
+
+/*
+ * Create a new cursor with default values for a given target.
+ */
+struct dc_cursor *dc_create_cursor_for_target(
+ const struct dc *dc,
+ struct dc_target *dc_target);
+
+/**
+ * Commit cursor attribute changes such as pixel format and dimensions and
+ * surface address.
+ *
+ * After this call:
+ * Cursor address and format is programmed to the new values.
+ * Cursor position is unmodified.
+ */
+bool dc_commit_cursor(
+ const struct dc *dc,
+ struct dc_cursor *cursor);
+
+/*
+ * Optimized cursor position update
+ *
+ * After this call:
+ * Cursor position will be programmed as well as enable/disable bit.
+ */
+bool dc_set_cursor_position(
+ const struct dc *dc,
+ struct dc_cursor *cursor,
+ struct dc_cursor_position *pos);
+
+/*******************************************************************************
+ * Interrupt interfaces
+ ******************************************************************************/
+enum dc_irq_source dc_interrupt_to_irq_source(
+ struct dc *dc,
+ uint32_t src_id,
+ uint32_t ext_id);
+void dc_interrupt_set(const struct dc *dc, enum dc_irq_source src, bool enable);
+void dc_interrupt_ack(struct dc *dc, enum dc_irq_source src);
+enum dc_irq_source dc_get_hpd_irq_source_at_index(
+ struct dc *dc, uint32_t link_index);
+
+/*******************************************************************************
+ * Power Interfaces
+ ******************************************************************************/
+
+void dc_set_power_state(
+ struct dc *dc,
+ enum dc_acpi_cm_power_state power_state,
+ enum dc_video_power_state video_power_state);
+void dc_resume(const struct dc *dc);
+
+/*******************************************************************************
+ * DDC Interfaces
+ ******************************************************************************/
+
+const struct ddc_service *dc_get_ddc_at_index(
+ struct dc *dc, uint32_t link_index);
+
+/*
+ * DPCD access interfaces
+ */
+
+bool dc_read_dpcd(
+ struct dc *dc,
+ uint32_t link_index,
+ uint32_t address,
+ uint8_t *data,
+ uint32_t size);
+
+bool dc_write_dpcd(
+ struct dc *dc,
+ uint32_t link_index,
+ uint32_t address,
+ const uint8_t *data,
+ uint32_t size);
+
+bool dc_submit_i2c(
+ struct dc *dc,
+ uint32_t link_index,
+ struct i2c_command *cmd);
+
+#endif /* DC_INTERFACE_H_ */