linux/drivers/gpu/drm/amd/amdgpu/atombios_dp.c

/*
 * Copyright 2007-8 Advanced Micro Devices, Inc.
 * Copyright 2008 Red Hat 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: Dave Airlie
 *          Alex Deucher
 *          Jerome Glisse
 */

#include <drm/amdgpu_drm.h>
#include <drm/display/drm_dp_helper.h>

#include "amdgpu.h"

#include "atom.h"
#include "atom-bits.h"
#include "atombios_encoders.h"
#include "atombios_dp.h"
#include "amdgpu_connectors.h"
#include "amdgpu_atombios.h"

/* move these to drm_dp_helper.c/h */
#define DP_LINK_CONFIGURATION_SIZE …
#define DP_DPCD_SIZE …

static char *voltage_names[] = …;
static char *pre_emph_names[] = …;

/***** amdgpu AUX functions *****/

aux_channel_transaction;

static int amdgpu_atombios_dp_process_aux_ch(struct amdgpu_i2c_chan *chan,
				      u8 *send, int send_bytes,
				      u8 *recv, int recv_size,
				      u8 delay, u8 *ack)
{ … }

#define BARE_ADDRESS_SIZE …
#define HEADER_SIZE …

static ssize_t
amdgpu_atombios_dp_aux_transfer(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg)
{ … }

void amdgpu_atombios_dp_aux_init(struct amdgpu_connector *amdgpu_connector)
{ … }

/***** general DP utility functions *****/

#define DP_VOLTAGE_MAX …
#define DP_PRE_EMPHASIS_MAX …

static void amdgpu_atombios_dp_get_adjust_train(const u8 link_status[DP_LINK_STATUS_SIZE],
						int lane_count,
						u8 train_set[4])
{ … }

/* convert bits per color to bits per pixel */
/* get bpc from the EDID */
static unsigned amdgpu_atombios_dp_convert_bpc_to_bpp(int bpc)
{ … }

/***** amdgpu specific DP functions *****/

static int amdgpu_atombios_dp_get_dp_link_config(struct drm_connector *connector,
						 const u8 dpcd[DP_DPCD_SIZE],
						 unsigned pix_clock,
						 unsigned *dp_lanes, unsigned *dp_rate)
{ … }

static u8 amdgpu_atombios_dp_encoder_service(struct amdgpu_device *adev,
				      int action, int dp_clock,
				      u8 ucconfig, u8 lane_num)
{ … }

u8 amdgpu_atombios_dp_get_sinktype(struct amdgpu_connector *amdgpu_connector)
{ … }

static void amdgpu_atombios_dp_probe_oui(struct amdgpu_connector *amdgpu_connector)
{ … }

static void amdgpu_atombios_dp_ds_ports(struct amdgpu_connector *amdgpu_connector)
{ … }

int amdgpu_atombios_dp_get_dpcd(struct amdgpu_connector *amdgpu_connector)
{ … }

int amdgpu_atombios_dp_get_panel_mode(struct drm_encoder *encoder,
			       struct drm_connector *connector)
{ … }

void amdgpu_atombios_dp_set_link_config(struct drm_connector *connector,
				 const struct drm_display_mode *mode)
{ … }

int amdgpu_atombios_dp_mode_valid_helper(struct drm_connector *connector,
				  struct drm_display_mode *mode)
{ … }

bool amdgpu_atombios_dp_needs_link_train(struct amdgpu_connector *amdgpu_connector)
{ … }

void amdgpu_atombios_dp_set_rx_power_state(struct drm_connector *connector,
				    u8 power_state)
{ … }

struct amdgpu_atombios_dp_link_train_info { … };

static void
amdgpu_atombios_dp_update_vs_emph(struct amdgpu_atombios_dp_link_train_info *dp_info)
{ … }

static void
amdgpu_atombios_dp_set_tp(struct amdgpu_atombios_dp_link_train_info *dp_info, int tp)
{ … }

static int
amdgpu_atombios_dp_link_train_init(struct amdgpu_atombios_dp_link_train_info *dp_info)
{ … }

static int
amdgpu_atombios_dp_link_train_finish(struct amdgpu_atombios_dp_link_train_info *dp_info)
{ … }

static int
amdgpu_atombios_dp_link_train_cr(struct amdgpu_atombios_dp_link_train_info *dp_info)
{ … }

static int
amdgpu_atombios_dp_link_train_ce(struct amdgpu_atombios_dp_link_train_info *dp_info)
{ … }

void amdgpu_atombios_dp_link_train(struct drm_encoder *encoder,
			    struct drm_connector *connector)
{ … }