linux/drivers/gpu/drm/radeon/r600_hdmi.c

/*
 * Copyright 2008 Advanced Micro Devices, Inc.
 * Copyright 2008 Red Hat Inc.
 * Copyright 2009 Christian König.
 *
 * 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: Christian König
 */
#include <linux/hdmi.h>
#include <linux/gcd.h>

#include <drm/radeon_drm.h>
#include "radeon.h"
#include "radeon_asic.h"
#include "radeon_audio.h"
#include "r600.h"
#include "r600d.h"
#include "atom.h"

/*
 * HDMI color format
 */
enum r600_hdmi_color_format { … };

/*
 * IEC60958 status bits
 */
enum r600_hdmi_iec_status_bits { … };

static struct r600_audio_pin r600_audio_status(struct radeon_device *rdev)
{ … }

/*
 * update all hdmi interfaces with current audio parameters
 */
void r600_audio_update_hdmi(struct work_struct *work)
{ … }

/* enable the audio stream */
void r600_audio_enable(struct radeon_device *rdev,
		       struct r600_audio_pin *pin,
		       u8 enable_mask)
{ … }

struct r600_audio_pin *r600_audio_get_pin(struct radeon_device *rdev)
{ … }

void r600_hdmi_update_acr(struct drm_encoder *encoder, long offset,
	const struct radeon_hdmi_acr *acr)
{ … }

/*
 * build a HDMI Video Info Frame
 */
void r600_set_avi_packet(struct radeon_device *rdev, u32 offset,
			 unsigned char *buffer, size_t size)
{ … }

/*
 * build a Audio Info Frame
 */
static void r600_hdmi_update_audio_infoframe(struct drm_encoder *encoder,
					     const void *buffer, size_t size)
{ … }

/*
 * test if audio buffer is filled enough to start playing
 */
static bool r600_hdmi_is_audio_buffer_filled(struct drm_encoder *encoder)
{ … }

/*
 * have buffer status changed since last call?
 */
int r600_hdmi_buffer_status_changed(struct drm_encoder *encoder)
{ … }

/*
 * write the audio workaround status to the hardware
 */
void r600_hdmi_audio_workaround(struct drm_encoder *encoder)
{ … }

void r600_hdmi_audio_set_dto(struct radeon_device *rdev,
			     struct radeon_crtc *crtc, unsigned int clock)
{ … }

void r600_set_vbi_packet(struct drm_encoder *encoder, u32 offset)
{ … }

void r600_set_audio_packet(struct drm_encoder *encoder, u32 offset)
{ … }

void r600_set_mute(struct drm_encoder *encoder, u32 offset, bool mute)
{ … }

/**
 * r600_hdmi_update_audio_settings - Update audio infoframe
 *
 * @encoder: drm encoder
 *
 * Gets info about current audio stream and updates audio infoframe.
 */
void r600_hdmi_update_audio_settings(struct drm_encoder *encoder)
{ … }

/*
 * enable the HDMI engine
 */
void r600_hdmi_enable(struct drm_encoder *encoder, bool enable)
{ … }