/*
* Copyright (C) 2012 Avionic Design GmbH
*
* 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, sub license,
* 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 (including the
* next paragraph) 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 NON-INFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS 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.
*/
#include <linux/bitops.h>
#include <linux/bug.h>
#include <linux/errno.h>
#include <linux/export.h>
#include <linux/hdmi.h>
#include <linux/string.h>
#include <linux/device.h>
#define hdmi_log(fmt, ...) dev_printk(level, dev, fmt, ##__VA_ARGS__)
static u8 hdmi_infoframe_checksum(const u8 *ptr, size_t size)
{
u8 csum = 0;
size_t i;
/* compute checksum */
for (i = 0; i < size; i++)
csum += ptr[i];
return 256 - csum;
}
static void hdmi_infoframe_set_checksum(void *buffer, size_t size)
{
u8 *ptr = buffer;
ptr[3] = hdmi_infoframe_checksum(buffer, size);
}
/**
* hdmi_avi_infoframe_init() - initialize an HDMI AVI infoframe
* @frame: HDMI AVI infoframe
*
* Returns 0 on success or a negative error code on failure.
*/
int hdmi_avi_infoframe_init(struct hdmi_avi_infoframe *frame)
{
memset(frame, 0, sizeof(*frame));
frame->type = HDMI_INFOFRAME_TYPE_AVI;
frame->version = 2;
frame->length = HDMI_AVI_INFOFRAME_SIZE;
return 0;
}
EXPORT_SYMBOL(hdmi_avi_infoframe_init);
static int hdmi_avi_infoframe_check_only(const struct hdmi_avi_infoframe *frame)
{
if (frame->type != HDMI_INFOFRAME_TYPE_AVI ||
frame->version != 2 ||
frame->length != HDMI_AVI_INFOFRAME_SIZE)
return -EINVAL;
if (frame->picture_aspect > HDMI_PICTURE_ASPECT_16_9)
return -EINVAL;
return 0;
}
/**
* hdmi_avi_infoframe_check() - check a HDMI AVI infoframe
* @frame: HDMI AVI infoframe
*
* Validates that the infoframe is consistent and updates derived fields
* (eg. length) based on other fields.
*
* Returns 0 on success or a negative error code on failure.
*/
int hdmi_avi_infoframe_check(struct hdmi_avi_infoframe *frame)
{
return hdmi_avi_infoframe_check_only(frame);
}
EXPORT_SYMBOL(hdmi_avi_infoframe_check);
/**
* hdmi_avi_infoframe_pack_only() - write HDMI AVI infoframe to binary buffer
* @frame: HDMI AVI infoframe
* @buffer: destination buffer
* @size: size of buffer
*
* Packs the information contained in the @frame structure into a binary
* representation that can be written into the corresponding controller
* registers. Also computes the checksum as required by section 5.3.5 of
* the HDMI 1.4 specification.
*
* Returns the number of bytes packed into the binary buffer or a negative
* error code on failure.
*/
ssize_t hdmi_avi_infoframe_pack_only(const struct hdmi_avi_infoframe *frame,
void *buffer, size_t size)
{
u8 *ptr = buffer;
size_t length;
int ret;
ret = hdmi_avi_infoframe_check_only(frame);
if (ret)
return ret;
length = HDMI_INFOFRAME_HEADER_SIZE + frame->length;
if (size < length)
return -ENOSPC;
memset(buffer, 0, size);
ptr[0] = frame->type;
ptr[1] = frame->version;
ptr[2] = frame->length;
ptr[3] = 0; /* checksum */
/* start infoframe payload */
ptr += HDMI_INFOFRAME_HEADER_SIZE;
ptr[0] = ((frame->colorspace & 0x3) << 5) | (frame->scan_mode & 0x3);
/*
* Data byte 1, bit 4 has to be set if we provide the active format
* aspect ratio
*/
if (frame->active_aspect & 0xf)
ptr[0] |= BIT(4);
/* Bit 3 and 2 indicate if we transmit horizontal/vertical bar data */
if (frame->top_bar || frame->bottom_bar)
ptr[0] |= BIT(3);
if (frame->left_bar || frame->right_bar)
ptr[0] |= BIT(2);
ptr[1] = ((frame->colorimetry & 0x3) << 6) |
((frame->picture_aspect & 0x3) << 4) |
(frame->active_aspect & 0xf);
ptr[2] = ((frame->extended_colorimetry & 0x7) << 4) |
((frame->quantization_range & 0x3) << 2) |
(frame->nups & 0x3);
if (frame->itc)
ptr[2] |= BIT(7);
ptr[3] = frame->video_code & 0x7f;
ptr[4] = ((frame->ycc_quantization_range & 0x3) << 6) |
((frame->content_type & 0x3) << 4) |
(frame->pixel_repeat & 0xf);
ptr[5] = frame->top_bar & 0xff;
ptr[6] = (frame->top_bar >> 8) & 0xff;
ptr[7] = frame->bottom_bar & 0xff;
ptr[8] = (frame->bottom_bar >> 8) & 0xff;
ptr[9] = frame->left_bar & 0xff;
ptr[10] = (frame->left_bar >> 8) & 0xff;
ptr[11] = frame->right_bar & 0xff;
ptr[12] = (frame->right_bar >> 8) & 0xff;
hdmi_infoframe_set_checksum(buffer, length);
return length;
}
EXPORT_SYMBOL(hdmi_avi_infoframe_pack_only);
/**
* hdmi_avi_infoframe_pack() - check a HDMI AVI infoframe,
* and write it to binary buffer
* @frame: HDMI AVI infoframe
* @buffer: destination buffer
* @size: size of buffer
*
* Validates that the infoframe is consistent and updates derived fields
* (eg. length) based on other fields, after which it packs the information
* contained in the @frame structure into a binary representation that
* can be written into the corresponding controller registers. This function
* also computes the checksum as required by section 5.3.5 of the HDMI 1.4
* specification.
*
* Returns the number of bytes packed into the binary buffer or a negative
* error code on failure.
*/
ssize_t hdmi_avi_infoframe_pack(struct hdmi_avi_infoframe *frame,
void *buffer, size_t size)
{
int ret;
ret = hdmi_avi_infoframe_check(frame);
if (ret)
return ret;
return hdmi_avi_infoframe_pack_only(frame, buffer, size);
}
EXPORT_SYMBOL(hdmi_avi_infoframe_pack);
/**
* hdmi_spd_infoframe_init() - initialize an HDMI SPD infoframe
* @frame: HDMI SPD infoframe
* @vendor: vendor string
* @product: product string
*
* Returns 0 on success or a negative error code on failure.
*/
int hdmi_spd_infoframe_init(struct hdmi_spd_infoframe *frame,
const char *vendor, const char *product)
{
memset(frame, 0, sizeof(*frame));
frame->type = HDMI_INFOFRAME_TYPE_SPD;
frame->version = 1;
frame->length = HDMI_SPD_INFOFRAME_SIZE;
strncpy(frame->vendor, vendor, sizeof(frame->vendor));
strncpy(frame->product, product, sizeof(frame->product));
return 0;
}
EXPORT_SYMBOL(hdmi_spd_infoframe_init);
static int hdmi_spd_infoframe_check_only(const struct hdmi_spd_infoframe *frame)
{
if (frame->type != HDMI_INFOFRAME_TYPE_SPD ||
frame->version != 1 ||
frame->length != HDMI_SPD_INFOFRAME_SIZE)
return -EINVAL;
return 0;
}
/**
* hdmi_spd_infoframe_check() - check a HDMI SPD infoframe
* @frame: HDMI SPD infoframe
*
* Validates that the infoframe is consistent and updates derived fields
* (eg. length) based on other fields.
*
* Returns 0 on success or a negative error code on failure.
*/
int hdmi_spd_infoframe_check(struct hdmi_spd_infoframe *frame)
{
return hdmi_spd_infoframe_check_only(frame);
}
EXPORT_SYMBOL(hdmi_spd_infoframe_check);
/**
* hdmi_spd_infoframe_pack_only() - write HDMI SPD infoframe to binary buffer
* @frame: HDMI SPD infoframe
* @buffer: destination buffer
* @size: size of buffer
*
* Packs the information contained in the @frame structure into a binary
* representation that can be written into the corresponding controller
* registers. Also computes the checksum as required by section 5.3.5 of
* the HDMI 1.4 specification.
*
* Returns the number of bytes packed into the binary buffer or a negative
* error code on failure.
*/
ssize_t hdmi_spd_infoframe_pack_only(const struct hdmi_spd_infoframe *frame,
void *buffer, size_t size)
{
u8 *ptr = buffer;
size_t length;
int ret;
ret = hdmi_spd_infoframe_check_only(frame);
if (ret)
return ret;
length = HDMI_INFOFRAME_HEADER_SIZE + frame->length;
if (size < length)
return -ENOSPC;
memset(buffer, 0, size);
ptr[0] = frame->type;
ptr[1] = frame->version;
ptr[2] = frame->length;
ptr[3] = 0; /* checksum */
/* start infoframe payload */
ptr += HDMI_INFOFRAME_HEADER_SIZE;
memcpy(ptr, frame->vendor, sizeof(frame->vendor));
memcpy(ptr + 8, frame->product, sizeof(frame->product));
ptr[24] = frame->sdi;
hdmi_infoframe_set_checksum(buffer, length);
return length;
}
EXPORT_SYMBOL(hdmi_spd_infoframe_pack_only);
/**
* hdmi_spd_infoframe_pack() - check a HDMI SPD infoframe,
* and write it to binary buffer
* @frame: HDMI SPD infoframe
* @buffer: destination buffer
* @size: size of buffer
*
* Validates that the infoframe is consistent and updates derived fields
* (eg. length) based on other fields, after which it packs the information
* contained in the @frame structure into a binary representation that
* can be written into the corresponding controller registers. This function
* also computes the checksum as required by section 5.3.5 of the HDMI 1.4
* specification.
*
* Returns the number of bytes packed into the binary buffer or a negative
* error code on failure.
*/
ssize_t hdmi_spd_infoframe_pack(struct hdmi_spd_infoframe *frame,
void *buffer, size_t size)
{
int ret;
ret = hdmi_spd_infoframe_check(frame);
if (ret)
return ret;
return hdmi_spd_infoframe_pack_only(frame, buffer, size);
}
EXPORT_SYMBOL(hdmi_spd_infoframe_pack);
/**
* hdmi_audio_infoframe_init() - initialize an HDMI audio infoframe
* @frame: HDMI audio infoframe
*
* Returns 0 on success or a negative error code on failure.
*/
int hdmi_audio_infoframe_init(struct hdmi_audio_infoframe *frame)
{
memset(frame, 0, sizeof(*frame));
frame->type = HDMI_INFOFRAME_TYPE_AUDIO;
frame->version = 1;
frame->length = HDMI_AUDIO_INFOFRAME_SIZE;
return 0;
}
EXPORT_SYMBOL(hdmi_audio_infoframe_init);
static int hdmi_audio_infoframe_check_only(const struct hdmi_audio_infoframe *frame)
{
if (frame->type != HDMI_INFOFRAME_TYPE_AUDIO ||
frame->version != 1 ||
frame->length != HDMI_AUDIO_INFOFRAME_SIZE)
return -EINVAL;
return 0;
}
/**
* hdmi_audio_infoframe_check() - check a HDMI audio infoframe
* @frame: HDMI audio infoframe
*
* Validates that the infoframe is consistent and updates derived fields
* (eg. length) based on other fields.
*
* Returns 0 on success or a negative error code on failure.
*/
int hdmi_audio_infoframe_check(struct hdmi_audio_infoframe *frame)
{
return hdmi_audio_infoframe_check_only(frame);
}
EXPORT_SYMBOL(hdmi_audio_infoframe_check);
/**
* hdmi_audio_infoframe_pack_only() - write HDMI audio infoframe to binary buffer
* @frame: HDMI audio infoframe
* @buffer: destination buffer
* @size: size of buffer
*
* Packs the information contained in the @frame structure into a binary
* representation that can be written into the corresponding controller
* registers. Also computes the checksum as required by section 5.3.5 of
* the HDMI 1.4 specification.
*
* Returns the number of bytes packed into the binary buffer or a negative
* error code on failure.
*/
ssize_t hdmi_audio_infoframe_pack_only(const struct hdmi_audio_infoframe *frame,
void *buffer, size_t size)
{
unsigned char channels;
u8 *ptr = buffer;
size_t length;
int ret;
ret = hdmi_audio_infoframe_check_only(frame);
if (ret)
return ret;
length = HDMI_INFOFRAME_HEADER_SIZE + frame->length;
if (size < length)
return -ENOSPC;
memset(buffer, 0, size);
if (frame->channels >= 2)
channels = frame->channels - 1;
else
channels = 0;
ptr[0] = frame->type;
ptr[1] = frame->version;
ptr[2] = frame->length;
ptr[3] = 0; /* checksum */
/* start infoframe payload */
ptr += HDMI_INFOFRAME_HEADER_SIZE;
ptr[0] = ((frame->coding_type & 0xf) << 4) | (channels & 0x7);
ptr[1] = ((frame->sample_frequency & 0x7) << 2) |
(frame->sample_size & 0x3);
ptr[2] = frame->coding_type_ext & 0x1f;
ptr[3] = frame->channel_allocation;
ptr[4] = (frame->level_shift_value & 0xf) << 3;
if (frame->downmix_inhibit)
ptr[4] |= BIT(7);
hdmi_infoframe_set_checksum(buffer, length);
return length;
}
EXPORT_SYMBOL(hdmi_audio_infoframe_pack_only);
/**
* hdmi_audio_infoframe_pack() - check a HDMI Audio infoframe,
* and write it to binary buffer
* @frame: HDMI Audio infoframe
* @buffer: destination buffer
* @size: size of buffer
*
* Validates that the infoframe is consistent and updates derived fields
* (eg. length) based on other fields, after which it packs the information
* contained in the @frame structure into a binary representation that
* can be written into the corresponding controller registers. This function
* also computes the checksum as required by section 5.3.5 of the HDMI 1.4
* specification.
*
* Returns the number of bytes packed into the binary buffer or a negative
* error code on failure.
*/
ssize_t hdmi_audio_infoframe_pack(struct hdmi_audio_infoframe *frame,
void *buffer, size_t size)
{
int ret;
ret = hdmi_audio_infoframe_check(frame);
if (ret)
return ret;
return hdmi_audio_infoframe_pack_only(frame, buffer, size);
}
EXPORT_SYMBOL(hdmi_audio_infoframe_pack);
/**
* hdmi_vendor_infoframe_init() - initialize an HDMI vendor infoframe
* @frame: HDMI vendor infoframe
*
* Returns 0 on success or a negative error code on failure.
*/
int hdmi_vendor_infoframe_init(struct hdmi_vendor_infoframe *frame)
{
memset(frame, 0, sizeof(*frame));
frame->type = HDMI_INFOFRAME_TYPE_VENDOR;
frame->version = 1;
frame->oui = HDMI_IEEE_OUI;
/*
* 0 is a valid value for s3d_struct, so we use a special "not set"
* value
*/
frame->s3d_struct = HDMI_3D_STRUCTURE_INVALID;
frame->length = 4;
return 0;
}
EXPORT_SYMBOL(hdmi_vendor_infoframe_init);
static int hdmi_vendor_infoframe_length(const struct hdmi_vendor_infoframe *frame)
{
/* for side by side (half) we also need to provide 3D_Ext_Data */
if (frame->s3d_struct >= HDMI_3D_STRUCTURE_SIDE_BY_SIDE_HALF)
return 6;
else if (frame->vic != 0 || frame->s3d_struct != HDMI_3D_STRUCTURE_INVALID)
return 5;
else
return 4;
}
static int hdmi_vendor_infoframe_check_only(const struct hdmi_vendor_infoframe *frame)
{
if (frame->type != HDMI_INFOFRAME_TYPE_VENDOR ||
frame->version != 1 ||
frame->oui != HDMI_IEEE_OUI)
return -EINVAL;
/* only one of those can be supplied */
if (frame->vic != 0 && frame->s3d_struct != HDMI_3D_STRUCTURE_INVALID)
return -EINVAL;
if (frame->length != hdmi_vendor_infoframe_length(frame))
return -EINVAL;
return 0;
}
/**
* hdmi_vendor_infoframe_check() - check a HDMI vendor infoframe
* @frame: HDMI infoframe
*
* Validates that the infoframe is consistent and updates derived fields
* (eg. length) based on other fields.
*
* Returns 0 on success or a negative error code on failure.
*/
int hdmi_vendor_infoframe_check(struct hdmi_vendor_infoframe *frame)
{
frame->length = hdmi_vendor_infoframe_length(frame);
return hdmi_vendor_infoframe_check_only(frame);
}
EXPORT_SYMBOL(hdmi_vendor_infoframe_check);
/**
* hdmi_vendor_infoframe_pack_only() - write a HDMI vendor infoframe to binary buffer
* @frame: HDMI infoframe
* @buffer: destination buffer
* @size: size of buffer
*
* Packs the information contained in the @frame structure into a binary
* representation that can be written into the corresponding controller
* registers. Also computes the checksum as required by section 5.3.5 of
* the HDMI 1.4 specification.
*
* Returns the number of bytes packed into the binary buffer or a negative
* error code on failure.
*/
ssize_t hdmi_vendor_infoframe_pack_only(const struct hdmi_vendor_infoframe *frame,
void *buffer, size_t size)
{
u8 *ptr = buffer;
size_t length;
int ret;
ret = hdmi_vendor_infoframe_check_only(frame);
if (ret)
return ret;
length = HDMI_INFOFRAME_HEADER_SIZE + frame->length;
if (size < length)
return -ENOSPC;
memset(buffer, 0, size);
ptr[0] = frame->type;
ptr[1] = frame->version;
ptr[2] = frame->length;
ptr[3] = 0; /* checksum */
/* HDMI OUI */
ptr[4] = 0x03;
ptr[5] = 0x0c;
ptr[6] = 0x00;
if (frame->s3d_struct != HDMI_3D_STRUCTURE_INVALID) {
ptr[7] = 0x2 << 5; /* video format */
ptr[8] = (frame->s3d_struct & 0xf) << 4;
if (frame->s3d_struct >= HDMI_3D_STRUCTURE_SIDE_BY_SIDE_HALF)
ptr[9] = (frame->s3d_ext_data & 0xf) << 4;
} else if (frame->vic) {
ptr[7] = 0x1 << 5; /* video format */
ptr[8] = frame->vic;
} else {
ptr[7] = 0x0 << 5; /* video format */
}
hdmi_infoframe_set_checksum(buffer, length);
return length;
}
EXPORT_SYMBOL(hdmi_vendor_infoframe_pack_only);
/**
* hdmi_vendor_infoframe_pack() - check a HDMI Vendor infoframe,
* and write it to binary buffer
* @frame: HDMI Vendor infoframe
* @buffer: destination buffer
* @size: size of buffer
*
* Validates that the infoframe is consistent and updates derived fields
* (eg. length) based on other fields, after which it packs the information
* contained in the @frame structure into a binary representation that
* can be written into the corresponding controller registers. This function
* also computes the checksum as required by section 5.3.5 of the HDMI 1.4
* specification.
*
* Returns the number of bytes packed into the binary buffer or a negative
* error code on failure.
*/
ssize_t hdmi_vendor_infoframe_pack(struct hdmi_vendor_infoframe *frame,
void *buffer, size_t size)
{
int ret;
ret = hdmi_vendor_infoframe_check(frame);
if (ret)
return ret;
return hdmi_vendor_infoframe_pack_only(frame, buffer, size);
}
EXPORT_SYMBOL(hdmi_vendor_infoframe_pack);
static int
hdmi_vendor_any_infoframe_check_only(const union hdmi_vendor_any_infoframe *frame)
{
if (frame->any.type != HDMI_INFOFRAME_TYPE_VENDOR ||
frame->any.version != 1)
return -EINVAL;
return 0;
}
/*
* hdmi_vendor_any_infoframe_check() - check a vendor infoframe
*/
static int
hdmi_vendor_any_infoframe_check(union hdmi_vendor_any_infoframe *frame)
{
int ret;
ret = hdmi_vendor_any_infoframe_check_only(frame);
if (ret)
return ret;
/* we only know about HDMI vendor infoframes */
if (frame->any.oui != HDMI_IEEE_OUI)
return -EINVAL;
return hdmi_vendor_infoframe_check(&frame->hdmi);
}
/*
* hdmi_vendor_any_infoframe_pack_only() - write a vendor infoframe to binary buffer
*/
static ssize_t
hdmi_vendor_any_infoframe_pack_only(const union hdmi_vendor_any_infoframe *frame,
void *buffer, size_t size)
{
int ret;
ret = hdmi_vendor_any_infoframe_check_only(frame);
if (ret)
return ret;
/* we only know about HDMI vendor infoframes */
if (frame->any.oui != HDMI_IEEE_OUI)
return -EINVAL;
return hdmi_vendor_infoframe_pack_only(&frame->hdmi, buffer, size);
}
/*
* hdmi_vendor_any_infoframe_pack() - check a vendor infoframe,
* and write it to binary buffer
*/
static ssize_t
hdmi_vendor_any_infoframe_pack(union hdmi_vendor_any_infoframe *frame,
void *buffer, size_t size)
{
int ret;
ret = hdmi_vendor_any_infoframe_check(frame);
if (ret)
return ret;
return hdmi_vendor_any_infoframe_pack_only(frame, buffer, size);
}
/**
* hdmi_infoframe_check() - check a HDMI infoframe
* @frame: HDMI infoframe
*
* Validates that the infoframe is consistent and updates derived fields
* (eg. length) based on other fields.
*
* Returns 0 on success or a negative error code on failure.
*/
int
hdmi_infoframe_check(union hdmi_infoframe *frame)
{
switch (frame->any.type) {
case HDMI_INFOFRAME_TYPE_AVI:
return hdmi_avi_infoframe_check(&frame->avi);
case HDMI_INFOFRAME_TYPE_SPD:
return hdmi_spd_infoframe_check(&frame->spd);
case HDMI_INFOFRAME_TYPE_AUDIO:
return hdmi_audio_infoframe_check(&frame->audio);
case HDMI_INFOFRAME_TYPE_VENDOR:
return hdmi_vendor_any_infoframe_check(&frame->vendor);
default:
WARN(1, "Bad infoframe type %d\n", frame->any.type);
return -EINVAL;
}
}
EXPORT_SYMBOL(hdmi_infoframe_check);
/**
* hdmi_infoframe_pack_only() - write a HDMI infoframe to binary buffer
* @frame: HDMI infoframe
* @buffer: destination buffer
* @size: size of buffer
*
* Packs the information contained in the @frame structure into a binary
* representation that can be written into the corresponding controller
* registers. Also computes the checksum as required by section 5.3.5 of
* the HDMI 1.4 specification.
*
* Returns the number of bytes packed into the binary buffer or a negative
* error code on failure.
*/
ssize_t
hdmi_infoframe_pack_only(const union hdmi_infoframe *frame, void *buffer, size_t size)
{
ssize_t length;
switch (frame->any.type) {
case HDMI_INFOFRAME_TYPE_AVI:
length = hdmi_avi_infoframe_pack_only(&frame->avi,
buffer, size);
break;
case HDMI_INFOFRAME_TYPE_SPD:
length = hdmi_spd_infoframe_pack_only(&frame->spd,
buffer, size);
break;
case HDMI_INFOFRAME_TYPE_AUDIO:
length = hdmi_audio_infoframe_pack_only(&frame->audio,
buffer, size);
break;
case HDMI_INFOFRAME_TYPE_VENDOR:
length = hdmi_vendor_any_infoframe_pack_only(&frame->vendor,
buffer, size);
break;
default:
WARN(1, "Bad infoframe type %d\n", frame->any.type);
length = -EINVAL;
}
return length;
}
EXPORT_SYMBOL(hdmi_infoframe_pack_only);
/**
* hdmi_infoframe_pack() - check a HDMI infoframe,
* and write it to binary buffer
* @frame: HDMI infoframe
* @buffer: destination buffer
* @size: size of buffer
*
* Validates that the infoframe is consistent and updates derived fields
* (eg. length) based on other fields, after which it packs the information
* contained in the @frame structure into a binary representation that
* can be written into the corresponding controller registers. This function
* also computes the checksum as required by section 5.3.5 of the HDMI 1.4
* specification.
*
* Returns the number of bytes packed into the binary buffer or a negative
* error code on failure.
*/
ssize_t
hdmi_infoframe_pack(union hdmi_infoframe *frame,
void *buffer, size_t size)
{
ssize_t length;
switch (frame->any.type) {
case HDMI_INFOFRAME_TYPE_AVI:
length = hdmi_avi_infoframe_pack(&frame->avi, buffer, size);
break;
case HDMI_INFOFRAME_TYPE_SPD:
length = hdmi_spd_infoframe_pack(&frame->spd, buffer, size);
break;
case HDMI_INFOFRAME_TYPE_AUDIO:
length = hdmi_audio_infoframe_pack(&frame->audio, buffer, size);
break;
case HDMI_INFOFRAME_TYPE_VENDOR:
length = hdmi_vendor_any_infoframe_pack(&frame->vendor,
buffer, size);
break;
default:
WARN(1, "Bad infoframe type %d\n", frame->any.type);
length = -EINVAL;
}
return length;
}
EXPORT_SYMBOL(hdmi_infoframe_pack);
static const char *hdmi_infoframe_type_get_name(enum hdmi_infoframe_type type)
{
if (type < 0x80 || type > 0x9f)
return "Invalid";
switch (type) {
case HDMI_INFOFRAME_TYPE_VENDOR:
return "Vendor";
case HDMI_INFOFRAME_TYPE_AVI:
return "Auxiliary Video Information (AVI)";
case HDMI_INFOFRAME_TYPE_SPD:
return "Source Product Description (SPD)";
case HDMI_INFOFRAME_TYPE_AUDIO:
return "Audio";
}
return "Reserved";
}
static void hdmi_infoframe_log_header(const char *level,
struct device *dev,
const struct hdmi_any_infoframe *frame)
{
hdmi_log("HDMI infoframe: %s, version %u, length %u\n",
hdmi_infoframe_type_get_name(frame->type),
frame->version, frame->length);
}
static const char *hdmi_colorspace_get_name(enum hdmi_colorspace colorspace)
{
switch (colorspace) {
case HDMI_COLORSPACE_RGB:
return "RGB";
case HDMI_COLORSPACE_YUV422:
return "YCbCr 4:2:2";
case HDMI_COLORSPACE_YUV444:
return "YCbCr 4:4:4";
case HDMI_COLORSPACE_YUV420:
return "YCbCr 4:2:0";
case HDMI_COLORSPACE_RESERVED4:
return "Reserved (4)";
case HDMI_COLORSPACE_RESERVED5:
return "Reserved (5)";
case HDMI_COLORSPACE_RESERVED6:
return "Reserved (6)";
case HDMI_COLORSPACE_IDO_DEFINED:
return "IDO Defined";
}
return "Invalid";
}
static const char *hdmi_scan_mode_get_name(enum hdmi_scan_mode scan_mode)
{
switch (scan_mode) {
case HDMI_SCAN_MODE_NONE:
return "No Data";
case HDMI_SCAN_MODE_OVERSCAN:
return "Overscan";
case HDMI_SCAN_MODE_UNDERSCAN:
return "Underscan";
case HDMI_SCAN_MODE_RESERVED:
return "Reserved";
}
return "Invalid";
}
static const char *hdmi_colorimetry_get_name(enum hdmi_colorimetry colorimetry)
{
switch (colorimetry) {
case HDMI_COLORIMETRY_NONE:
return "No Data";
case HDMI_COLORIMETRY_ITU_601:
return "ITU601";
case HDMI_COLORIMETRY_ITU_709:
return "ITU709";
case HDMI_COLORIMETRY_EXTENDED:
return "Extended";
}
return "Invalid";
}
static const char *
hdmi_picture_aspect_get_name(enum hdmi_picture_aspect picture_aspect)
{
switch (picture_aspect) {
case HDMI_PICTURE_ASPECT_NONE:
return "No Data";
case HDMI_PICTURE_ASPECT_4_3:
return "4:3";
case HDMI_PICTURE_ASPECT_16_9:
return "16:9";
case HDMI_PICTURE_ASPECT_64_27:
return "64:27";
case HDMI_PICTURE_ASPECT_256_135:
return "256:135";
case HDMI_PICTURE_ASPECT_RESERVED:
return "Reserved";
}
return "Invalid";
}
static const char *
hdmi_active_aspect_get_name(enum hdmi_active_aspect active_aspect)
{
if (active_aspect < 0 || active_aspect > 0xf)
return "Invalid";
switch (active_aspect) {
case HDMI_ACTIVE_ASPECT_16_9_TOP:
return "16:9 Top";
case HDMI_ACTIVE_ASPECT_14_9_TOP:
return "14:9 Top";
case HDMI_ACTIVE_ASPECT_16_9_CENTER:
return "16:9 Center";
case HDMI_ACTIVE_ASPECT_PICTURE:
return "Same as Picture";
case HDMI_ACTIVE_ASPECT_4_3:
return "4:3";
case HDMI_ACTIVE_ASPECT_16_9:
return "16:9";
case HDMI_ACTIVE_ASPECT_14_9:
return "14:9";
case HDMI_ACTIVE_ASPECT_4_3_SP_14_9:
return "4:3 SP 14:9";
case HDMI_ACTIVE_ASPECT_16_9_SP_14_9:
return "16:9 SP 14:9";
case HDMI_ACTIVE_ASPECT_16_9_SP_4_3:
return "16:9 SP 4:3";
}
return "Reserved";
}
static const char *
hdmi_extended_colorimetry_get_name(enum hdmi_extended_colorimetry ext_col)
{
switch (ext_col) {
case HDMI_EXTENDED_COLORIMETRY_XV_YCC_601:
return "xvYCC 601";
case HDMI_EXTENDED_COLORIMETRY_XV_YCC_709:
return "xvYCC 709";
case HDMI_EXTENDED_COLORIMETRY_S_YCC_601:
return "sYCC 601";
case HDMI_EXTENDED_COLORIMETRY_OPYCC_601:
return "opYCC 601";
case HDMI_EXTENDED_COLORIMETRY_OPRGB:
return "opRGB";
case HDMI_EXTENDED_COLORIMETRY_BT2020_CONST_LUM:
return "BT.2020 Constant Luminance";
case HDMI_EXTENDED_COLORIMETRY_BT2020:
return "BT.2020";
case HDMI_EXTENDED_COLORIMETRY_RESERVED:
return "Reserved";
}
return "Invalid";
}
static const char *
hdmi_quantization_range_get_name(enum hdmi_quantization_range qrange)
{
switch (qrange) {
case HDMI_QUANTIZATION_RANGE_DEFAULT:
return "Default";
case HDMI_QUANTIZATION_RANGE_LIMITED:
return "Limited";
case HDMI_QUANTIZATION_RANGE_FULL:
return "Full";
case HDMI_QUANTIZATION_RANGE_RESERVED:
return "Reserved";
}
return "Invalid";
}
static const char *hdmi_nups_get_name(enum hdmi_nups nups)
{
switch (nups) {
case HDMI_NUPS_UNKNOWN:
return "Unknown Non-uniform Scaling";
case HDMI_NUPS_HORIZONTAL:
return "Horizontally Scaled";
case HDMI_NUPS_VERTICAL:
return "Vertically Scaled";
case HDMI_NUPS_BOTH:
return "Horizontally and Vertically Scaled";
}
return "Invalid";
}
static const char *
hdmi_ycc_quantization_range_get_name(enum hdmi_ycc_quantization_range qrange)
{
switch (qrange) {
case HDMI_YCC_QUANTIZATION_RANGE_LIMITED:
return "Limited";
case HDMI_YCC_QUANTIZATION_RANGE_FULL:
return "Full";
}
return "Invalid";
}
static const char *
hdmi_content_type_get_name(enum hdmi_content_type content_type)
{
switch (content_type) {
case HDMI_CONTENT_TYPE_GRAPHICS:
return "Graphics";
case HDMI_CONTENT_TYPE_PHOTO:
return "Photo";
case HDMI_CONTENT_TYPE_CINEMA:
return "Cinema";
case HDMI_CONTENT_TYPE_GAME:
return "Game";
}
return "Invalid";
}
/**
* hdmi_avi_infoframe_log() - log info of HDMI AVI infoframe
* @level: logging level
* @dev: device
* @frame: HDMI AVI infoframe
*/
static void hdmi_avi_infoframe_log(const char *level,
struct device *dev,
const struct hdmi_avi_infoframe *frame)
{
hdmi_infoframe_log_header(level, dev,
(const struct hdmi_any_infoframe *)frame);
hdmi_log(" colorspace: %s\n",
hdmi_colorspace_get_name(frame->colorspace));
hdmi_log(" scan mode: %s\n",
hdmi_scan_mode_get_name(frame->scan_mode));
hdmi_log(" colorimetry: %s\n",
hdmi_colorimetry_get_name(frame->colorimetry));
hdmi_log(" picture aspect: %s\n",
hdmi_picture_aspect_get_name(frame->picture_aspect));
hdmi_log(" active aspect: %s\n",
hdmi_active_aspect_get_name(frame->active_aspect));
hdmi_log(" itc: %s\n", frame->itc ? "IT Content" : "No Data");
hdmi_log(" extended colorimetry: %s\n",
hdmi_extended_colorimetry_get_name(frame->extended_colorimetry));
hdmi_log(" quantization range: %s\n",
hdmi_quantization_range_get_name(frame->quantization_range));
hdmi_log(" nups: %s\n", hdmi_nups_get_name(frame->nups));
hdmi_log(" video code: %u\n", frame->video_code);
hdmi_log(" ycc quantization range: %s\n",
hdmi_ycc_quantization_range_get_name(frame->ycc_quantization_range));
hdmi_log(" hdmi content type: %s\n",
hdmi_content_type_get_name(frame->content_type));
hdmi_log(" pixel repeat: %u\n", frame->pixel_repeat);
hdmi_log(" bar top %u, bottom %u, left %u, right %u\n",
frame->top_bar, frame->bottom_bar,
frame->left_bar, frame->right_bar);
}
static const char *hdmi_spd_sdi_get_name(enum hdmi_spd_sdi sdi)
{
if (sdi < 0 || sdi > 0xff)
return "Invalid";
switch (sdi) {
case HDMI_SPD_SDI_UNKNOWN:
return "Unknown";
case HDMI_SPD_SDI_DSTB:
return "Digital STB";
case HDMI_SPD_SDI_DVDP:
return "DVD Player";
case HDMI_SPD_SDI_DVHS:
return "D-VHS";
case HDMI_SPD_SDI_HDDVR:
return "HDD Videorecorder";
case HDMI_SPD_SDI_DVC:
return "DVC";
case HDMI_SPD_SDI_DSC:
return "DSC";
case HDMI_SPD_SDI_VCD:
return "Video CD";
case HDMI_SPD_SDI_GAME:
return "Game";
case HDMI_SPD_SDI_PC:
return "PC General";
case HDMI_SPD_SDI_BD:
return "Blu-Ray Disc (BD)";
case HDMI_SPD_SDI_SACD:
return "Super Audio CD";
case HDMI_SPD_SDI_HDDVD:
return "HD DVD";
case HDMI_SPD_SDI_PMP:
return "PMP";
}
return "Reserved";
}
/**
* hdmi_spd_infoframe_log() - log info of HDMI SPD infoframe
* @level: logging level
* @dev: device
* @frame: HDMI SPD infoframe
*/
static void hdmi_spd_infoframe_log(const char *level,
struct device *dev,
const struct hdmi_spd_infoframe *frame)
{
u8 buf[17];
hdmi_infoframe_log_header(level, dev,
(const struct hdmi_any_infoframe *)frame);
memset(buf, 0, sizeof(buf));
strncpy(buf, frame->vendor, 8);
hdmi_log(" vendor: %s\n", buf);
strncpy(buf, frame->product, 16);
hdmi_log(" product: %s\n", buf);
hdmi_log(" source device information: %s (0x%x)\n",
hdmi_spd_sdi_get_name(frame->sdi), frame->sdi);
}
static const char *
hdmi_audio_coding_type_get_name(enum hdmi_audio_coding_type coding_type)
{
switch (coding_type) {
case HDMI_AUDIO_CODING_TYPE_STREAM:
return "Refer to Stream Header";
case HDMI_AUDIO_CODING_TYPE_PCM:
return "PCM";
case HDMI_AUDIO_CODING_TYPE_AC3:
return "AC-3";
case HDMI_AUDIO_CODING_TYPE_MPEG1:
return "MPEG1";
case HDMI_AUDIO_CODING_TYPE_MP3:
return "MP3";
case HDMI_AUDIO_CODING_TYPE_MPEG2:
return "MPEG2";
case HDMI_AUDIO_CODING_TYPE_AAC_LC:
return "AAC";
case HDMI_AUDIO_CODING_TYPE_DTS:
return "DTS";
case HDMI_AUDIO_CODING_TYPE_ATRAC:
return "ATRAC";
case HDMI_AUDIO_CODING_TYPE_DSD:
return "One Bit Audio";
case HDMI_AUDIO_CODING_TYPE_EAC3:
return "Dolby Digital +";
case HDMI_AUDIO_CODING_TYPE_DTS_HD:
return "DTS-HD";
case HDMI_AUDIO_CODING_TYPE_MLP:
return "MAT (MLP)";
case HDMI_AUDIO_CODING_TYPE_DST:
return "DST";
case HDMI_AUDIO_CODING_TYPE_WMA_PRO:
return "WMA PRO";
case HDMI_AUDIO_CODING_TYPE_CXT:
return "Refer to CXT";
}
return "Invalid";
}
static const char *
hdmi_audio_sample_size_get_name(enum hdmi_audio_sample_size sample_size)
{
switch (sample_size) {
case HDMI_AUDIO_SAMPLE_SIZE_STREAM:
return "Refer to Stream Header";
case HDMI_AUDIO_SAMPLE_SIZE_16:
return "16 bit";
case HDMI_AUDIO_SAMPLE_SIZE_20:
return "20 bit";
case HDMI_AUDIO_SAMPLE_SIZE_24:
return "24 bit";
}
return "Invalid";
}
static const char *
hdmi_audio_sample_frequency_get_name(enum hdmi_audio_sample_frequency freq)
{
switch (freq) {
case HDMI_AUDIO_SAMPLE_FREQUENCY_STREAM:
return "Refer to Stream Header";
case HDMI_AUDIO_SAMPLE_FREQUENCY_32000:
return "32 kHz";
case HDMI_AUDIO_SAMPLE_FREQUENCY_44100:
return "44.1 kHz (CD)";
case HDMI_AUDIO_SAMPLE_FREQUENCY_48000:
return "48 kHz";
case HDMI_AUDIO_SAMPLE_FREQUENCY_88200:
return "88.2 kHz";
case HDMI_AUDIO_SAMPLE_FREQUENCY_96000:
return "96 kHz";
case HDMI_AUDIO_SAMPLE_FREQUENCY_176400:
return "176.4 kHz";
case HDMI_AUDIO_SAMPLE_FREQUENCY_192000:
return "192 kHz";
}
return "Invalid";
}
static const char *
hdmi_audio_coding_type_ext_get_name(enum hdmi_audio_coding_type_ext ctx)
{
if (ctx < 0 || ctx > 0x1f)
return "Invalid";
switch (ctx) {
case HDMI_AUDIO_CODING_TYPE_EXT_CT:
return "Refer to CT";
case HDMI_AUDIO_CODING_TYPE_EXT_HE_AAC:
return "HE AAC";
case HDMI_AUDIO_CODING_TYPE_EXT_HE_AAC_V2:
return "HE AAC v2";
case HDMI_AUDIO_CODING_TYPE_EXT_MPEG_SURROUND:
return "MPEG SURROUND";
case HDMI_AUDIO_CODING_TYPE_EXT_MPEG4_HE_AAC:
return "MPEG-4 HE AAC";
case HDMI_AUDIO_CODING_TYPE_EXT_MPEG4_HE_AAC_V2:
return "MPEG-4 HE AAC v2";
case HDMI_AUDIO_CODING_TYPE_EXT_MPEG4_AAC_LC:
return "MPEG-4 AAC LC";
case HDMI_AUDIO_CODING_TYPE_EXT_DRA:
return "DRA";
case HDMI_AUDIO_CODING_TYPE_EXT_MPEG4_HE_AAC_SURROUND:
return "MPEG-4 HE AAC + MPEG Surround";
case HDMI_AUDIO_CODING_TYPE_EXT_MPEG4_AAC_LC_SURROUND:
return "MPEG-4 AAC LC + MPEG Surround";
}
return "Reserved";
}
/**
* hdmi_audio_infoframe_log() - log info of HDMI AUDIO infoframe
* @level: logging level
* @dev: device
* @frame: HDMI AUDIO infoframe
*/
static void hdmi_audio_infoframe_log(const char *level,
struct device *dev,
const struct hdmi_audio_infoframe *frame)
{
hdmi_infoframe_log_header(level, dev,
(const struct hdmi_any_infoframe *)frame);
if (frame->channels)
hdmi_log(" channels: %u\n", frame->channels - 1);
else
hdmi_log(" channels: Refer to stream header\n");
hdmi_log(" coding type: %s\n",
hdmi_audio_coding_type_get_name(frame->coding_type));
hdmi_log(" sample size: %s\n",
hdmi_audio_sample_size_get_name(frame->sample_size));
hdmi_log(" sample frequency: %s\n",
hdmi_audio_sample_frequency_get_name(frame->sample_frequency));
hdmi_log(" coding type ext: %s\n",
hdmi_audio_coding_type_ext_get_name(frame->coding_type_ext));
hdmi_log(" channel allocation: 0x%x\n",
frame->channel_allocation);
hdmi_log(" level shift value: %u dB\n",
frame->level_shift_value);
hdmi_log(" downmix inhibit: %s\n",
frame->downmix_inhibit ? "Yes" : "No");
}
static const char *
hdmi_3d_structure_get_name(enum hdmi_3d_structure s3d_struct)
{
if (s3d_struct < 0 || s3d_struct > 0xf)
return "Invalid";
switch (s3d_struct) {
case HDMI_3D_STRUCTURE_FRAME_PACKING:
return "Frame Packing";
case HDMI_3D_STRUCTURE_FIELD_ALTERNATIVE:
return "Field Alternative";
case HDMI_3D_STRUCTURE_LINE_ALTERNATIVE:
return "Line Alternative";
case HDMI_3D_STRUCTURE_SIDE_BY_SIDE_FULL:
return "Side-by-side (Full)";
case HDMI_3D_STRUCTURE_L_DEPTH:
return "L + Depth";
case HDMI_3D_STRUCTURE_L_DEPTH_GFX_GFX_DEPTH:
return "L + Depth + Graphics + Graphics-depth";
case HDMI_3D_STRUCTURE_TOP_AND_BOTTOM:
return "Top-and-Bottom";
case HDMI_3D_STRUCTURE_SIDE_BY_SIDE_HALF:
return "Side-by-side (Half)";
default:
break;
}
return "Reserved";
}
/**
* hdmi_vendor_infoframe_log() - log info of HDMI VENDOR infoframe
* @level: logging level
* @dev: device
* @frame: HDMI VENDOR infoframe
*/
static void
hdmi_vendor_any_infoframe_log(const char *level,
struct device *dev,
const union hdmi_vendor_any_infoframe *frame)
{
const struct hdmi_vendor_infoframe *hvf = &frame->hdmi;
hdmi_infoframe_log_header(level, dev,
(const struct hdmi_any_infoframe *)frame);
if (frame->any.oui != HDMI_IEEE_OUI) {
hdmi_log(" not a HDMI vendor infoframe\n");
return;
}
if (hvf->vic == 0 && hvf->s3d_struct == HDMI_3D_STRUCTURE_INVALID) {
hdmi_log(" empty frame\n");
return;
}
if (hvf->vic)
hdmi_log(" HDMI VIC: %u\n", hvf->vic);
if (hvf->s3d_struct != HDMI_3D_STRUCTURE_INVALID) {
hdmi_log(" 3D structure: %s\n",
hdmi_3d_structure_get_name(hvf->s3d_struct));
if (hvf->s3d_struct >= HDMI_3D_STRUCTURE_SIDE_BY_SIDE_HALF)
hdmi_log(" 3D extension data: %d\n",
hvf->s3d_ext_data);
}
}
/**
* hdmi_infoframe_log() - log info of HDMI infoframe
* @level: logging level
* @dev: device
* @frame: HDMI infoframe
*/
void hdmi_infoframe_log(const char *level,
struct device *dev,
const union hdmi_infoframe *frame)
{
switch (frame->any.type) {
case HDMI_INFOFRAME_TYPE_AVI:
hdmi_avi_infoframe_log(level, dev, &frame->avi);
break;
case HDMI_INFOFRAME_TYPE_SPD:
hdmi_spd_infoframe_log(level, dev, &frame->spd);
break;
case HDMI_INFOFRAME_TYPE_AUDIO:
hdmi_audio_infoframe_log(level, dev, &frame->audio);
break;
case HDMI_INFOFRAME_TYPE_VENDOR:
hdmi_vendor_any_infoframe_log(level, dev, &frame->vendor);
break;
}
}
EXPORT_SYMBOL(hdmi_infoframe_log);
/**
* hdmi_avi_infoframe_unpack() - unpack binary buffer to a HDMI AVI infoframe
* @frame: HDMI AVI infoframe
* @buffer: source buffer
* @size: size of buffer
*
* Unpacks the information contained in binary @buffer into a structured
* @frame of the HDMI Auxiliary Video (AVI) information frame.
* Also verifies the checksum as required by section 5.3.5 of the HDMI 1.4
* specification.
*
* Returns 0 on success or a negative error code on failure.
*/
static int hdmi_avi_infoframe_unpack(struct hdmi_avi_infoframe *frame,
const void *buffer, size_t size)
{
const u8 *ptr = buffer;
int ret;
if (size < HDMI_INFOFRAME_SIZE(AVI))
return -EINVAL;
if (ptr[0] != HDMI_INFOFRAME_TYPE_AVI ||
ptr[1] != 2 ||
ptr[2] != HDMI_AVI_INFOFRAME_SIZE)
return -EINVAL;
if (hdmi_infoframe_checksum(buffer, HDMI_INFOFRAME_SIZE(AVI)) != 0)
return -EINVAL;
ret = hdmi_avi_infoframe_init(frame);
if (ret)
return ret;
ptr += HDMI_INFOFRAME_HEADER_SIZE;
frame->colorspace = (ptr[0] >> 5) & 0x3;
if (ptr[0] & 0x10)
frame->active_aspect = ptr[1] & 0xf;
if (ptr[0] & 0x8) {
frame->top_bar = (ptr[5] << 8) + ptr[6];
frame->bottom_bar = (ptr[7] << 8) + ptr[8];
}
if (ptr[0] & 0x4) {
frame->left_bar = (ptr[9] << 8) + ptr[10];
frame->right_bar = (ptr[11] << 8) + ptr[12];
}
frame->scan_mode = ptr[0] & 0x3;
frame->colorimetry = (ptr[1] >> 6) & 0x3;
frame->picture_aspect = (ptr[1] >> 4) & 0x3;
frame->active_aspect = ptr[1] & 0xf;
frame->itc = ptr[2] & 0x80 ? true : false;
frame->extended_colorimetry = (ptr[2] >> 4) & 0x7;
frame->quantization_range = (ptr[2] >> 2) & 0x3;
frame->nups = ptr[2] & 0x3;
frame->video_code = ptr[3] & 0x7f;
frame->ycc_quantization_range = (ptr[4] >> 6) & 0x3;
frame->content_type = (ptr[4] >> 4) & 0x3;
frame->pixel_repeat = ptr[4] & 0xf;
return 0;
}
/**
* hdmi_spd_infoframe_unpack() - unpack binary buffer to a HDMI SPD infoframe
* @frame: HDMI SPD infoframe
* @buffer: source buffer
* @size: size of buffer
*
* Unpacks the information contained in binary @buffer into a structured
* @frame of the HDMI Source Product Description (SPD) information frame.
* Also verifies the checksum as required by section 5.3.5 of the HDMI 1.4
* specification.
*
* Returns 0 on success or a negative error code on failure.
*/
static int hdmi_spd_infoframe_unpack(struct hdmi_spd_infoframe *frame,
const void *buffer, size_t size)
{
const u8 *ptr = buffer;
int ret;
if (size < HDMI_INFOFRAME_SIZE(SPD))
return -EINVAL;
if (ptr[0] != HDMI_INFOFRAME_TYPE_SPD ||
ptr[1] != 1 ||
ptr[2] != HDMI_SPD_INFOFRAME_SIZE) {
return -EINVAL;
}
if (hdmi_infoframe_checksum(buffer, HDMI_INFOFRAME_SIZE(SPD)) != 0)
return -EINVAL;
ptr += HDMI_INFOFRAME_HEADER_SIZE;
ret = hdmi_spd_infoframe_init(frame, ptr, ptr + 8);
if (ret)
return ret;
frame->sdi = ptr[24];
return 0;
}
/**
* hdmi_audio_infoframe_unpack() - unpack binary buffer to a HDMI AUDIO infoframe
* @frame: HDMI Audio infoframe
* @buffer: source buffer
* @size: size of buffer
*
* Unpacks the information contained in binary @buffer into a structured
* @frame of the HDMI Audio information frame.
* Also verifies the checksum as required by section 5.3.5 of the HDMI 1.4
* specification.
*
* Returns 0 on success or a negative error code on failure.
*/
static int hdmi_audio_infoframe_unpack(struct hdmi_audio_infoframe *frame,
const void *buffer, size_t size)
{
const u8 *ptr = buffer;
int ret;
if (size < HDMI_INFOFRAME_SIZE(AUDIO))
return -EINVAL;
if (ptr[0] != HDMI_INFOFRAME_TYPE_AUDIO ||
ptr[1] != 1 ||
ptr[2] != HDMI_AUDIO_INFOFRAME_SIZE) {
return -EINVAL;
}
if (hdmi_infoframe_checksum(buffer, HDMI_INFOFRAME_SIZE(AUDIO)) != 0)
return -EINVAL;
ret = hdmi_audio_infoframe_init(frame);
if (ret)
return ret;
ptr += HDMI_INFOFRAME_HEADER_SIZE;
frame->channels = ptr[0] & 0x7;
frame->coding_type = (ptr[0] >> 4) & 0xf;
frame->sample_size = ptr[1] & 0x3;
frame->sample_frequency = (ptr[1] >> 2) & 0x7;
frame->coding_type_ext = ptr[2] & 0x1f;
frame->channel_allocation = ptr[3];
frame->level_shift_value = (ptr[4] >> 3) & 0xf;
frame->downmix_inhibit = ptr[4] & 0x80 ? true : false;
return 0;
}
/**
* hdmi_vendor_infoframe_unpack() - unpack binary buffer to a HDMI vendor infoframe
* @frame: HDMI Vendor infoframe
* @buffer: source buffer
* @size: size of buffer
*
* Unpacks the information contained in binary @buffer into a structured
* @frame of the HDMI Vendor information frame.
* Also verifies the checksum as required by section 5.3.5 of the HDMI 1.4
* specification.
*
* Returns 0 on success or a negative error code on failure.
*/
static int
hdmi_vendor_any_infoframe_unpack(union hdmi_vendor_any_infoframe *frame,
const void *buffer, size_t size)
{
const u8 *ptr = buffer;
size_t length;
int ret;
u8 hdmi_video_format;
struct hdmi_vendor_infoframe *hvf = &frame->hdmi;
if (size < HDMI_INFOFRAME_HEADER_SIZE)
return -EINVAL;
if (ptr[0] != HDMI_INFOFRAME_TYPE_VENDOR ||
ptr[1] != 1 ||
(ptr[2] != 4 && ptr[2] != 5 && ptr[2] != 6))
return -EINVAL;
length = ptr[2];
if (size < HDMI_INFOFRAME_HEADER_SIZE + length)
return -EINVAL;
if (hdmi_infoframe_checksum(buffer,
HDMI_INFOFRAME_HEADER_SIZE + length) != 0)
return -EINVAL;
ptr += HDMI_INFOFRAME_HEADER_SIZE;
/* HDMI OUI */
if ((ptr[0] != 0x03) ||
(ptr[1] != 0x0c) ||
(ptr[2] != 0x00))
return -EINVAL;
hdmi_video_format = ptr[3] >> 5;
if (hdmi_video_format > 0x2)
return -EINVAL;
ret = hdmi_vendor_infoframe_init(hvf);
if (ret)
return ret;
hvf->length = length;
if (hdmi_video_format == 0x2) {
if (length != 5 && length != 6)
return -EINVAL;
hvf->s3d_struct = ptr[4] >> 4;
if (hvf->s3d_struct >= HDMI_3D_STRUCTURE_SIDE_BY_SIDE_HALF) {
if (length != 6)
return -EINVAL;
hvf->s3d_ext_data = ptr[5] >> 4;
}
} else if (hdmi_video_format == 0x1) {
if (length != 5)
return -EINVAL;
hvf->vic = ptr[4];
} else {
if (length != 4)
return -EINVAL;
}
return 0;
}
/**
* hdmi_infoframe_unpack() - unpack binary buffer to a HDMI infoframe
* @frame: HDMI infoframe
* @buffer: source buffer
* @size: size of buffer
*
* Unpacks the information contained in binary buffer @buffer into a structured
* @frame of a HDMI infoframe.
* Also verifies the checksum as required by section 5.3.5 of the HDMI 1.4
* specification.
*
* Returns 0 on success or a negative error code on failure.
*/
int hdmi_infoframe_unpack(union hdmi_infoframe *frame,
const void *buffer, size_t size)
{
int ret;
const u8 *ptr = buffer;
if (size < HDMI_INFOFRAME_HEADER_SIZE)
return -EINVAL;
switch (ptr[0]) {
case HDMI_INFOFRAME_TYPE_AVI:
ret = hdmi_avi_infoframe_unpack(&frame->avi, buffer, size);
break;
case HDMI_INFOFRAME_TYPE_SPD:
ret = hdmi_spd_infoframe_unpack(&frame->spd, buffer, size);
break;
case HDMI_INFOFRAME_TYPE_AUDIO:
ret = hdmi_audio_infoframe_unpack(&frame->audio, buffer, size);
break;
case HDMI_INFOFRAME_TYPE_VENDOR:
ret = hdmi_vendor_any_infoframe_unpack(&frame->vendor, buffer, size);
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
EXPORT_SYMBOL(hdmi_infoframe_unpack);
