Quelle hdmi.c
Sprache: C
/*
* 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 <drm/display/drm_dp.h>
#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
*/
void 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;
}
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 & 0 x3) << 5 ) | (frame->scan_mode & 0 x3);
/*
* Data byte 1 , bit 4 has to be set if we provide the active format
* aspect ratio
*/
if (frame->active_aspect & 0 xf)
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 & 0 x3) << 6 ) |
((frame->picture_aspect & 0 x3) << 4 ) |
(frame->active_aspect & 0 xf);
ptr[2 ] = ((frame->extended_colorimetry & 0 x7) << 4 ) |
((frame->quantization_range & 0 x3) << 2 ) |
(frame->nups & 0 x3);
if (frame->itc)
ptr[2 ] |= BIT(7 );
ptr[3 ] = frame->video_code & 0 x7f;
ptr[4 ] = ((frame->ycc_quantization_range & 0 x3) << 6 ) |
((frame->content_type & 0 x3) << 4 ) |
(frame->pixel_repeat & 0 xf);
ptr[5 ] = frame->top_bar & 0 xff;
ptr[6 ] = (frame->top_bar >> 8 ) & 0 xff;
ptr[7 ] = frame->bottom_bar & 0 xff;
ptr[8 ] = (frame->bottom_bar >> 8 ) & 0 xff;
ptr[9 ] = frame->left_bar & 0 xff;
ptr[10 ] = (frame->left_bar >> 8 ) & 0 xff;
ptr[11 ] = frame->right_bar & 0 xff;
ptr[12 ] = (frame->right_bar >> 8 ) & 0 xff;
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)
{
size_t len;
memset(frame, 0 , sizeof (*frame));
frame->type = HDMI_INFOFRAME_TYPE_SPD;
frame->version = 1 ;
frame->length = HDMI_SPD_INFOFRAME_SIZE;
len = strlen(vendor);
memcpy(frame->vendor, vendor, min(len, sizeof (frame->vendor)));
len = strlen(product);
memcpy(frame->product, product, min(len, 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(const struct hdmi_audio_infoframe *frame)
{
return hdmi_audio_infoframe_check_only(frame);
}
EXPORT_SYMBOL(hdmi_audio_infoframe_check);
static void
hdmi_audio_infoframe_pack_payload(const struct hdmi_audio_infoframe *frame,
u8 *buffer)
{
u8 channels;
if (frame->channels >= 2 )
channels = frame->channels - 1 ;
else
channels = 0 ;
buffer[0 ] = ((frame->coding_type & 0 xf) << 4 ) | (channels & 0 x7);
buffer[1 ] = ((frame->sample_frequency & 0 x7) << 2 ) |
(frame->sample_size & 0 x3);
buffer[2 ] = frame->coding_type_ext & 0 x1f;
buffer[3 ] = frame->channel_allocation;
buffer[4 ] = (frame->level_shift_value & 0 xf) << 3 ;
if (frame->downmix_inhibit)
buffer[4 ] |= BIT(7 );
}
/**
* 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)
{
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);
ptr[0 ] = frame->type;
ptr[1 ] = frame->version;
ptr[2 ] = frame->length;
ptr[3 ] = 0 ; /* checksum */
hdmi_audio_infoframe_pack_payload(frame,
ptr + HDMI_INFOFRAME_HEADER_SIZE);
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_audio_infoframe_pack_for_dp - Pack a HDMI Audio infoframe for DisplayPort
*
* @ frame : HDMI Audio infoframe
* @ sdp : Secondary data packet for DisplayPort .
* @ dp_version : DisplayPort version to be encoded in the header
*
* Packs a HDMI Audio Infoframe to be sent over DisplayPort . This function
* fills the secondary data packet to be used for DisplayPort .
*
* Return : Number of total written bytes or a negative errno on failure .
*/
ssize_t
hdmi_audio_infoframe_pack_for_dp(const struct hdmi_audio_infoframe *frame,
struct dp_sdp *sdp, u8 dp_version)
{
int ret;
ret = hdmi_audio_infoframe_check(frame);
if (ret)
return ret;
memset(sdp->db, 0 , sizeof (sdp->db));
/* Secondary-data packet header */
sdp->sdp_header.HB0 = 0 ;
sdp->sdp_header.HB1 = frame->type;
sdp->sdp_header.HB2 = DP_SDP_AUDIO_INFOFRAME_HB2;
sdp->sdp_header.HB3 = (dp_version & 0 x3f) << 2 ;
hdmi_audio_infoframe_pack_payload(frame, sdp->db);
/* Return size = frame length + four HB for sdp_header */
return frame->length + 4 ;
}
EXPORT_SYMBOL(hdmi_audio_infoframe_pack_for_dp);
/**
* 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 = HDMI_VENDOR_INFOFRAME_SIZE;
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 ] = 0 x03;
ptr[5 ] = 0 x0c;
ptr[6 ] = 0 x00;
if (frame->s3d_struct != HDMI_3D_STRUCTURE_INVALID) {
ptr[7 ] = 0 x2 << 5 ; /* video format */
ptr[8 ] = (frame->s3d_struct & 0 xf) << 4 ;
if (frame->s3d_struct >= HDMI_3D_STRUCTURE_SIDE_BY_SIDE_HALF)
ptr[9 ] = (frame->s3d_ext_data & 0 xf) << 4 ;
} else if (frame->vic) {
ptr[7 ] = 0 x1 << 5 ; /* video format */
ptr[8 ] = frame->vic;
} else {
ptr[7 ] = 0 x0 << 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_drm_infoframe_init ( ) - initialize an HDMI Dynaminc Range and
* mastering infoframe
* @ frame : HDMI DRM infoframe
*
* Returns 0 on success or a negative error code on failure .
*/
int hdmi_drm_infoframe_init(struct hdmi_drm_infoframe *frame)
{
memset(frame, 0 , sizeof (*frame));
frame->type = HDMI_INFOFRAME_TYPE_DRM;
frame->version = 1 ;
frame->length = HDMI_DRM_INFOFRAME_SIZE;
return 0 ;
}
EXPORT_SYMBOL(hdmi_drm_infoframe_init);
static int hdmi_drm_infoframe_check_only(const struct hdmi_drm_infoframe *frame)
{
if (frame->type != HDMI_INFOFRAME_TYPE_DRM ||
frame->version != 1 )
return -EINVAL;
if (frame->length != HDMI_DRM_INFOFRAME_SIZE)
return -EINVAL;
return 0 ;
}
/**
* hdmi_drm_infoframe_check ( ) - check a HDMI DRM infoframe
* @ frame : HDMI DRM infoframe
*
* Validates that the infoframe is consistent .
* Returns 0 on success or a negative error code on failure .
*/
int hdmi_drm_infoframe_check(struct hdmi_drm_infoframe *frame)
{
return hdmi_drm_infoframe_check_only(frame);
}
EXPORT_SYMBOL(hdmi_drm_infoframe_check);
/**
* hdmi_drm_infoframe_pack_only ( ) - write HDMI DRM infoframe to binary buffer
* @ frame : HDMI DRM 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_drm_infoframe_pack_only(const struct hdmi_drm_infoframe *frame,
void *buffer, size_t size)
{
u8 *ptr = buffer;
size_t length;
int i;
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++ = frame->eotf;
*ptr++ = frame->metadata_type;
for (i = 0 ; i < 3 ; i++) {
*ptr++ = frame->display_primaries[i].x;
*ptr++ = frame->display_primaries[i].x >> 8 ;
*ptr++ = frame->display_primaries[i].y;
*ptr++ = frame->display_primaries[i].y >> 8 ;
}
*ptr++ = frame->white_point.x;
*ptr++ = frame->white_point.x >> 8 ;
*ptr++ = frame->white_point.y;
*ptr++ = frame->white_point.y >> 8 ;
*ptr++ = frame->max_display_mastering_luminance;
*ptr++ = frame->max_display_mastering_luminance >> 8 ;
*ptr++ = frame->min_display_mastering_luminance;
*ptr++ = frame->min_display_mastering_luminance >> 8 ;
*ptr++ = frame->max_cll;
*ptr++ = frame->max_cll >> 8 ;
*ptr++ = frame->max_fall;
*ptr++ = frame->max_fall >> 8 ;
hdmi_infoframe_set_checksum(buffer, length);
return length;
}
EXPORT_SYMBOL(hdmi_drm_infoframe_pack_only);
/**
* hdmi_drm_infoframe_pack ( ) - check a HDMI DRM infoframe ,
* and write it to binary buffer
* @ frame : HDMI DRM 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_drm_infoframe_pack(struct hdmi_drm_infoframe *frame,
void *buffer, size_t size)
{
int ret;
ret = hdmi_drm_infoframe_check(frame);
if (ret)
return ret;
return hdmi_drm_infoframe_pack_only(frame, buffer, size);
}
EXPORT_SYMBOL(hdmi_drm_infoframe_pack);
/*
* 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_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_DRM:
length = hdmi_drm_infoframe_pack_only(&frame->drm,
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_DRM:
length = hdmi_drm_infoframe_pack(&frame->drm, 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 < 0 x80 || type > 0 x9f)
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" ;
case HDMI_INFOFRAME_TYPE_DRM:
return "Dynamic Range and Mastering" ;
}
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 > 0 xf)
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" ;
}
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 > 0 xff)
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" ;
}
static void hdmi_spd_infoframe_log(const char *level,
struct device *dev,
const struct hdmi_spd_infoframe *frame)
{
hdmi_infoframe_log_header(level, dev,
(const struct hdmi_any_infoframe *)frame);
hdmi_log(" vendor: %.8s\n" , frame->vendor);
hdmi_log(" product: %.16s\n" , frame->product);
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 > 0 x1f)
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" ;
}
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 void hdmi_drm_infoframe_log(const char *level,
struct device *dev,
const struct hdmi_drm_infoframe *frame)
{
int i;
hdmi_infoframe_log_header(level, dev,
(struct hdmi_any_infoframe *)frame);
hdmi_log("length: %d\n" , frame->length);
hdmi_log("metadata type: %d\n" , frame->metadata_type);
hdmi_log("eotf: %d\n" , frame->eotf);
for (i = 0 ; i < 3 ; i++) {
hdmi_log("x[%d]: %d\n" , i, frame->display_primaries[i].x);
hdmi_log("y[%d]: %d\n" , i, frame->display_primaries[i].y);
}
hdmi_log("white point x: %d\n" , frame->white_point.x);
hdmi_log("white point y: %d\n" , frame->white_point.y);
hdmi_log("max_display_mastering_luminance: %d\n" ,
frame->max_display_mastering_luminance);
hdmi_log("min_display_mastering_luminance: %d\n" ,
frame->min_display_mastering_luminance);
hdmi_log("max_cll: %d\n" , frame->max_cll);
hdmi_log("max_fall: %d\n" , frame->max_fall);
}
static const char *
hdmi_3d_structure_get_name(enum hdmi_3d_structure s3d_struct)
{
if (s3d_struct < 0 || s3d_struct > 0 xf)
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" ;
}
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 ;
case HDMI_INFOFRAME_TYPE_DRM:
hdmi_drm_infoframe_log(level, dev, &frame->drm);
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;
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;
hdmi_avi_infoframe_init(frame);
ptr += HDMI_INFOFRAME_HEADER_SIZE;
frame->colorspace = (ptr[0 ] >> 5 ) & 0 x3;
if (ptr[0 ] & 0 x10)
frame->active_aspect = ptr[1 ] & 0 xf;
if (ptr[0 ] & 0 x8) {
frame->top_bar = (ptr[6 ] << 8 ) | ptr[5 ];
frame->bottom_bar = (ptr[8 ] << 8 ) | ptr[7 ];
}
if (ptr[0 ] & 0 x4) {
frame->left_bar = (ptr[10 ] << 8 ) | ptr[9 ];
frame->right_bar = (ptr[12 ] << 8 ) | ptr[11 ];
}
frame->scan_mode = ptr[0 ] & 0 x3;
frame->colorimetry = (ptr[1 ] >> 6 ) & 0 x3;
frame->picture_aspect = (ptr[1 ] >> 4 ) & 0 x3;
frame->active_aspect = ptr[1 ] & 0 xf;
frame->itc = ptr[2 ] & 0 x80 ? true : false ;
frame->extended_colorimetry = (ptr[2 ] >> 4 ) & 0 x7;
frame->quantization_range = (ptr[2 ] >> 2 ) & 0 x3;
frame->nups = ptr[2 ] & 0 x3;
frame->video_code = ptr[3 ] & 0 x7f;
frame->ycc_quantization_range = (ptr[4 ] >> 6 ) & 0 x3;
frame->content_type = (ptr[4 ] >> 4 ) & 0 x3;
frame->pixel_repeat = ptr[4 ] & 0 xf;
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 ] & 0 x7;
frame->coding_type = (ptr[0 ] >> 4 ) & 0 xf;
frame->sample_size = ptr[1 ] & 0 x3;
frame->sample_frequency = (ptr[1 ] >> 2 ) & 0 x7;
frame->coding_type_ext = ptr[2 ] & 0 x1f;
frame->channel_allocation = ptr[3 ];
frame->level_shift_value = (ptr[4 ] >> 3 ) & 0 xf;
frame->downmix_inhibit = ptr[4 ] & 0 x80 ? true : false ;
return 0 ;
}
/**
* hdmi_vendor_any_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 ] != 0 x03) ||
(ptr[1 ] != 0 x0c) ||
(ptr[2 ] != 0 x00))
return -EINVAL;
hdmi_video_format = ptr[3 ] >> 5 ;
if (hdmi_video_format > 0 x2)
return -EINVAL;
ret = hdmi_vendor_infoframe_init(hvf);
if (ret)
return ret;
hvf->length = length;
if (hdmi_video_format == 0 x2) {
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 == 0 x1) {
if (length != 5 )
return -EINVAL;
hvf->vic = ptr[4 ];
} else {
if (length != 4 )
return -EINVAL;
}
return 0 ;
}
/**
* hdmi_drm_infoframe_unpack_only ( ) - unpack binary buffer of CTA - 861 - G DRM
* infoframe DataBytes to a HDMI DRM
* infoframe
* @ frame : HDMI DRM infoframe
* @ buffer : source buffer
* @ size : size of buffer
*
* Unpacks CTA - 861 - G DRM infoframe DataBytes contained in the binary @ buffer
* into a structured @ frame of the HDMI Dynamic Range and Mastering ( DRM )
* infoframe .
*
* Returns 0 on success or a negative error code on failure .
*/
int hdmi_drm_infoframe_unpack_only(struct hdmi_drm_infoframe *frame,
const void *buffer, size_t size)
{
const u8 *ptr = buffer;
const u8 *temp;
u8 x_lsb, x_msb;
u8 y_lsb, y_msb;
int ret;
int i;
if (size < HDMI_DRM_INFOFRAME_SIZE)
return -EINVAL;
ret = hdmi_drm_infoframe_init(frame);
if (ret)
return ret;
frame->eotf = ptr[0 ] & 0 x7;
frame->metadata_type = ptr[1 ] & 0 x7;
temp = ptr + 2 ;
for (i = 0 ; i < 3 ; i++) {
x_lsb = *temp++;
x_msb = *temp++;
frame->display_primaries[i].x = (x_msb << 8 ) | x_lsb;
y_lsb = *temp++;
y_msb = *temp++;
frame->display_primaries[i].y = (y_msb << 8 ) | y_lsb;
}
frame->white_point.x = (ptr[15 ] << 8 ) | ptr[14 ];
frame->white_point.y = (ptr[17 ] << 8 ) | ptr[16 ];
frame->max_display_mastering_luminance = (ptr[19 ] << 8 ) | ptr[18 ];
frame->min_display_mastering_luminance = (ptr[21 ] << 8 ) | ptr[20 ];
frame->max_cll = (ptr[23 ] << 8 ) | ptr[22 ];
frame->max_fall = (ptr[25 ] << 8 ) | ptr[24 ];
return 0 ;
}
EXPORT_SYMBOL(hdmi_drm_infoframe_unpack_only);
/**
* hdmi_drm_infoframe_unpack ( ) - unpack binary buffer to a HDMI DRM infoframe
* @ frame : HDMI DRM infoframe
* @ buffer : source buffer
* @ size : size of buffer
*
* Unpacks the CTA - 861 - G DRM infoframe contained in the binary @ buffer into
* a structured @ frame of the HDMI Dynamic Range and Mastering ( DRM )
* infoframe . It 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_drm_infoframe_unpack(struct hdmi_drm_infoframe *frame,
const void *buffer, size_t size)
{
const u8 *ptr = buffer;
int ret;
if (size < HDMI_INFOFRAME_SIZE(DRM))
return -EINVAL;
if (ptr[0 ] != HDMI_INFOFRAME_TYPE_DRM ||
ptr[1 ] != 1 ||
ptr[2 ] != HDMI_DRM_INFOFRAME_SIZE)
return -EINVAL;
if (hdmi_infoframe_checksum(buffer, HDMI_INFOFRAME_SIZE(DRM)) != 0 )
return -EINVAL;
ret = hdmi_drm_infoframe_unpack_only(frame, ptr + HDMI_INFOFRAME_HEADER_SIZE,
size - HDMI_INFOFRAME_HEADER_SIZE);
return ret;
}
/**
* 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_DRM:
ret = hdmi_drm_infoframe_unpack(&frame->drm, 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);
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