[PATCHv2 2/3] hdmi: added unpack and logging functions for InfoFrames
Hans Verkuil
hverkuil at xs4all.nl
Tue Dec 2 04:08:45 PST 2014
From: Martin Bugge <marbugge at cisco.com>
When receiving video it is very useful to be able to unpack the InfoFrames.
Logging is useful as well, both for transmitters and receivers.
Especially when implementing the VIDIOC_LOG_STATUS ioctl (supported by many
V4L2 drivers) for a receiver it is important to be able to easily log what
the InfoFrame contains. This greatly simplifies debugging.
Signed-off-by: Martin Bugge <marbugge at cisco.com>
Signed-off-by: Hans Verkuil <hans.verkuil at cisco.com>
---
drivers/video/hdmi.c | 819 ++++++++++++++++++++++++++++++++++++++++++++++++++-
include/linux/hdmi.h | 4 +
2 files changed, 816 insertions(+), 7 deletions(-)
diff --git a/drivers/video/hdmi.c b/drivers/video/hdmi.c
index 9e758a8..5f7ab47 100644
--- a/drivers/video/hdmi.c
+++ b/drivers/video/hdmi.c
@@ -27,10 +27,12 @@
#include <linux/export.h>
#include <linux/hdmi.h>
#include <linux/string.h>
+#include <linux/device.h>
-static void hdmi_infoframe_checksum(void *buffer, size_t size)
+#define hdmi_log(fmt, ...) dev_printk(level, dev, fmt, ##__VA_ARGS__)
+
+static u8 hdmi_infoframe_checksum(u8 *ptr, size_t size)
{
- u8 *ptr = buffer;
u8 csum = 0;
size_t i;
@@ -38,7 +40,14 @@ static void hdmi_infoframe_checksum(void *buffer, size_t size)
for (i = 0; i < size; i++)
csum += ptr[i];
- ptr[3] = 256 - csum;
+ return 256 - csum;
+}
+
+static void hdmi_infoframe_set_checksum(void *buffer, size_t size)
+{
+ u8 *ptr = buffer;
+ /* update checksum */
+ ptr[3] = hdmi_infoframe_checksum(buffer, size);
}
/**
@@ -136,7 +145,7 @@ ssize_t hdmi_avi_infoframe_pack(struct hdmi_avi_infoframe *frame, void *buffer,
ptr[11] = frame->right_bar & 0xff;
ptr[12] = (frame->right_bar >> 8) & 0xff;
- hdmi_infoframe_checksum(buffer, length);
+ hdmi_infoframe_set_checksum(buffer, length);
return length;
}
@@ -206,7 +215,7 @@ ssize_t hdmi_spd_infoframe_pack(struct hdmi_spd_infoframe *frame, void *buffer,
ptr[24] = frame->sdi;
- hdmi_infoframe_checksum(buffer, length);
+ hdmi_infoframe_set_checksum(buffer, length);
return length;
}
@@ -281,7 +290,7 @@ ssize_t hdmi_audio_infoframe_pack(struct hdmi_audio_infoframe *frame,
if (frame->downmix_inhibit)
ptr[4] |= BIT(7);
- hdmi_infoframe_checksum(buffer, length);
+ hdmi_infoframe_set_checksum(buffer, length);
return length;
}
@@ -373,7 +382,7 @@ ssize_t hdmi_vendor_infoframe_pack(struct hdmi_vendor_infoframe *frame,
ptr[9] = (frame->s3d_ext_data & 0xf) << 4;
}
- hdmi_infoframe_checksum(buffer, length);
+ hdmi_infoframe_set_checksum(buffer, length);
return length;
}
@@ -434,3 +443,799 @@ hdmi_infoframe_pack(union hdmi_infoframe *frame, void *buffer, size_t size)
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, void *f)
+{
+ struct hdmi_any_infoframe *frame = f;
+
+ hdmi_log("HDMI infoframe: %s, version %d, length %d\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_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_ADOBE_YCC_601:
+ return "Adobe YCC 601";
+ case HDMI_EXTENDED_COLORIMETRY_ADOBE_RGB:
+ return "Adobe RGB";
+ 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 "No Known 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,
+ struct hdmi_avi_infoframe *frame)
+{
+ hdmi_infoframe_log_header(level, dev, 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: %d\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: %d\n", frame->pixel_repeat);
+ hdmi_log(" bar top %d, bottom %d, left %d, right %d\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,
+ struct hdmi_spd_infoframe *frame)
+{
+ u8 buf[17];
+
+ hdmi_infoframe_log_header(level, dev, 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_STREAM:
+ return "Stream";
+ 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,
+ struct hdmi_audio_infoframe *frame)
+{
+ hdmi_infoframe_log_header(level, dev, frame);
+
+ if (frame->channels)
+ hdmi_log(" channels: %d ch\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: %d\n",
+ frame->channel_allocation);
+ hdmi_log(" level shift value: %d 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,
+ union hdmi_vendor_any_infoframe *frame)
+{
+ struct hdmi_vendor_infoframe *hvf = &frame->hdmi;
+
+ hdmi_infoframe_log_header(level, dev, 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: %d\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,
+ 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
+ * @buffer: source buffer
+ * @frame: HDMI AVI infoframe
+ *
+ * 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,
+ void *buffer)
+{
+ u8 *ptr = buffer;
+ int ret;
+
+ 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
+ * @buffer: source buffer
+ * @frame: HDMI SPD infoframe
+ *
+ * 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,
+ void *buffer)
+{
+ u8 *ptr = buffer;
+ int ret;
+
+ 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
+ * @buffer: source buffer
+ * @frame: HDMI Audio infoframe
+ *
+ * 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,
+ void *buffer)
+{
+ u8 *ptr = buffer;
+ int ret;
+
+ 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
+ * @buffer: source buffer
+ * @frame: HDMI Vendor infoframe
+ *
+ * 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,
+ void *buffer)
+{
+ u8 *ptr = buffer;
+ size_t length;
+ int ret;
+ u8 hdmi_video_format;
+ struct hdmi_vendor_infoframe *hvf = &frame->hdmi;
+
+ if (ptr[0] != HDMI_INFOFRAME_TYPE_VENDOR ||
+ ptr[1] != 1 ||
+ (ptr[2] != 5 && ptr[2] != 6))
+ return -EINVAL;
+
+ length = ptr[2];
+
+ 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 == 0x1) {
+ hvf->vic = ptr[4];
+ } else if (hdmi_video_format == 0x2) {
+ hvf->s3d_struct = ptr[4] >> 4;
+ if (hvf->s3d_struct >= HDMI_3D_STRUCTURE_SIDE_BY_SIDE_HALF) {
+ if (length == 6)
+ hvf->s3d_ext_data = ptr[5] >> 4;
+ else
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
+/**
+ * hdmi_infoframe_unpack() - unpack binary buffer to a HDMI infoframe
+ * @buffer: source buffer
+ * @frame: HDMI infoframe
+ *
+ * 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, void *buffer)
+{
+ int ret;
+ u8 *ptr = buffer;
+
+ switch (ptr[0]) {
+ case HDMI_INFOFRAME_TYPE_AVI:
+ ret = hdmi_avi_infoframe_unpack(&frame->avi, buffer);
+ break;
+ case HDMI_INFOFRAME_TYPE_SPD:
+ ret = hdmi_spd_infoframe_unpack(&frame->spd, buffer);
+ break;
+ case HDMI_INFOFRAME_TYPE_AUDIO:
+ ret = hdmi_audio_infoframe_unpack(&frame->audio, buffer);
+ break;
+ case HDMI_INFOFRAME_TYPE_VENDOR:
+ ret = hdmi_vendor_any_infoframe_unpack(&frame->vendor, buffer);
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ return ret;
+}
+EXPORT_SYMBOL(hdmi_infoframe_unpack);
diff --git a/include/linux/hdmi.h b/include/linux/hdmi.h
index a4aa0c2..d6dea20 100644
--- a/include/linux/hdmi.h
+++ b/include/linux/hdmi.h
@@ -10,6 +10,7 @@
#define __LINUX_HDMI_H_
#include <linux/types.h>
+#include <linux/device.h>
enum hdmi_infoframe_type {
HDMI_INFOFRAME_TYPE_VENDOR = 0x81,
@@ -312,5 +313,8 @@ union hdmi_infoframe {
ssize_t
hdmi_infoframe_pack(union hdmi_infoframe *frame, void *buffer, size_t size);
+int hdmi_infoframe_unpack(union hdmi_infoframe *frame, void *buffer);
+void hdmi_infoframe_log(const char *level, struct device *dev,
+ union hdmi_infoframe *frame);
#endif /* _DRM_HDMI_H */
--
2.1.3
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