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1911 lines
51 KiB
1911 lines
51 KiB
/* |
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* Copyright (C) 2012 Avionic Design GmbH |
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* |
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* Permission is hereby granted, free of charge, to any person obtaining a |
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* copy of this software and associated documentation files (the "Software"), |
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* to deal in the Software without restriction, including without limitation |
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* the rights to use, copy, modify, merge, publish, distribute, sub license, |
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* and/or sell copies of the Software, and to permit persons to whom the |
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* Software is furnished to do so, subject to the following conditions: |
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* |
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* The above copyright notice and this permission notice (including the |
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* next paragraph) shall be included in all copies or substantial portions |
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* of the Software. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL |
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
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* DEALINGS IN THE SOFTWARE. |
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*/ |
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|
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#include <linux/bitops.h> |
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#include <linux/bug.h> |
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#include <linux/errno.h> |
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#include <linux/export.h> |
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#include <linux/hdmi.h> |
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#include <linux/string.h> |
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#include <linux/device.h> |
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#define hdmi_log(fmt, ...) dev_printk(level, dev, fmt, ##__VA_ARGS__) |
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static u8 hdmi_infoframe_checksum(const u8 *ptr, size_t size) |
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{ |
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u8 csum = 0; |
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size_t i; |
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/* compute checksum */ |
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for (i = 0; i < size; i++) |
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csum += ptr[i]; |
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return 256 - csum; |
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} |
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static void hdmi_infoframe_set_checksum(void *buffer, size_t size) |
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{ |
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u8 *ptr = buffer; |
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ptr[3] = hdmi_infoframe_checksum(buffer, size); |
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} |
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/** |
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* hdmi_avi_infoframe_init() - initialize an HDMI AVI infoframe |
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* @frame: HDMI AVI infoframe |
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*/ |
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void hdmi_avi_infoframe_init(struct hdmi_avi_infoframe *frame) |
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{ |
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memset(frame, 0, sizeof(*frame)); |
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frame->type = HDMI_INFOFRAME_TYPE_AVI; |
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frame->version = 2; |
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frame->length = HDMI_AVI_INFOFRAME_SIZE; |
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} |
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EXPORT_SYMBOL(hdmi_avi_infoframe_init); |
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static int hdmi_avi_infoframe_check_only(const struct hdmi_avi_infoframe *frame) |
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{ |
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if (frame->type != HDMI_INFOFRAME_TYPE_AVI || |
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frame->version != 2 || |
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frame->length != HDMI_AVI_INFOFRAME_SIZE) |
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return -EINVAL; |
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if (frame->picture_aspect > HDMI_PICTURE_ASPECT_16_9) |
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return -EINVAL; |
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return 0; |
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} |
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/** |
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* hdmi_avi_infoframe_check() - check a HDMI AVI infoframe |
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* @frame: HDMI AVI infoframe |
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* |
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* Validates that the infoframe is consistent and updates derived fields |
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* (eg. length) based on other fields. |
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* |
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* Returns 0 on success or a negative error code on failure. |
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*/ |
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int hdmi_avi_infoframe_check(struct hdmi_avi_infoframe *frame) |
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{ |
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return hdmi_avi_infoframe_check_only(frame); |
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} |
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EXPORT_SYMBOL(hdmi_avi_infoframe_check); |
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/** |
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* hdmi_avi_infoframe_pack_only() - write HDMI AVI infoframe to binary buffer |
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* @frame: HDMI AVI infoframe |
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* @buffer: destination buffer |
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* @size: size of buffer |
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* |
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* Packs the information contained in the @frame structure into a binary |
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* representation that can be written into the corresponding controller |
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* registers. Also computes the checksum as required by section 5.3.5 of |
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* the HDMI 1.4 specification. |
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* |
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* Returns the number of bytes packed into the binary buffer or a negative |
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* error code on failure. |
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*/ |
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ssize_t hdmi_avi_infoframe_pack_only(const struct hdmi_avi_infoframe *frame, |
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void *buffer, size_t size) |
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{ |
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u8 *ptr = buffer; |
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size_t length; |
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int ret; |
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ret = hdmi_avi_infoframe_check_only(frame); |
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if (ret) |
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return ret; |
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length = HDMI_INFOFRAME_HEADER_SIZE + frame->length; |
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if (size < length) |
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return -ENOSPC; |
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memset(buffer, 0, size); |
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ptr[0] = frame->type; |
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ptr[1] = frame->version; |
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ptr[2] = frame->length; |
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ptr[3] = 0; /* checksum */ |
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/* start infoframe payload */ |
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ptr += HDMI_INFOFRAME_HEADER_SIZE; |
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ptr[0] = ((frame->colorspace & 0x3) << 5) | (frame->scan_mode & 0x3); |
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/* |
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* Data byte 1, bit 4 has to be set if we provide the active format |
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* aspect ratio |
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*/ |
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if (frame->active_aspect & 0xf) |
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ptr[0] |= BIT(4); |
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/* Bit 3 and 2 indicate if we transmit horizontal/vertical bar data */ |
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if (frame->top_bar || frame->bottom_bar) |
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ptr[0] |= BIT(3); |
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if (frame->left_bar || frame->right_bar) |
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ptr[0] |= BIT(2); |
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ptr[1] = ((frame->colorimetry & 0x3) << 6) | |
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((frame->picture_aspect & 0x3) << 4) | |
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(frame->active_aspect & 0xf); |
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ptr[2] = ((frame->extended_colorimetry & 0x7) << 4) | |
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((frame->quantization_range & 0x3) << 2) | |
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(frame->nups & 0x3); |
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if (frame->itc) |
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ptr[2] |= BIT(7); |
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ptr[3] = frame->video_code & 0x7f; |
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ptr[4] = ((frame->ycc_quantization_range & 0x3) << 6) | |
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((frame->content_type & 0x3) << 4) | |
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(frame->pixel_repeat & 0xf); |
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ptr[5] = frame->top_bar & 0xff; |
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ptr[6] = (frame->top_bar >> 8) & 0xff; |
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ptr[7] = frame->bottom_bar & 0xff; |
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ptr[8] = (frame->bottom_bar >> 8) & 0xff; |
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ptr[9] = frame->left_bar & 0xff; |
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ptr[10] = (frame->left_bar >> 8) & 0xff; |
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ptr[11] = frame->right_bar & 0xff; |
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ptr[12] = (frame->right_bar >> 8) & 0xff; |
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hdmi_infoframe_set_checksum(buffer, length); |
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return length; |
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} |
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EXPORT_SYMBOL(hdmi_avi_infoframe_pack_only); |
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/** |
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* hdmi_avi_infoframe_pack() - check a HDMI AVI infoframe, |
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* and write it to binary buffer |
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* @frame: HDMI AVI infoframe |
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* @buffer: destination buffer |
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* @size: size of buffer |
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* |
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* Validates that the infoframe is consistent and updates derived fields |
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* (eg. length) based on other fields, after which it packs the information |
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* contained in the @frame structure into a binary representation that |
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* can be written into the corresponding controller registers. This function |
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* also computes the checksum as required by section 5.3.5 of the HDMI 1.4 |
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* specification. |
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* |
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* Returns the number of bytes packed into the binary buffer or a negative |
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* error code on failure. |
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*/ |
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ssize_t hdmi_avi_infoframe_pack(struct hdmi_avi_infoframe *frame, |
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void *buffer, size_t size) |
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{ |
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int ret; |
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ret = hdmi_avi_infoframe_check(frame); |
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if (ret) |
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return ret; |
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return hdmi_avi_infoframe_pack_only(frame, buffer, size); |
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} |
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EXPORT_SYMBOL(hdmi_avi_infoframe_pack); |
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/** |
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* hdmi_spd_infoframe_init() - initialize an HDMI SPD infoframe |
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* @frame: HDMI SPD infoframe |
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* @vendor: vendor string |
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* @product: product string |
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* |
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* Returns 0 on success or a negative error code on failure. |
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*/ |
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int hdmi_spd_infoframe_init(struct hdmi_spd_infoframe *frame, |
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const char *vendor, const char *product) |
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{ |
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size_t len; |
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memset(frame, 0, sizeof(*frame)); |
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frame->type = HDMI_INFOFRAME_TYPE_SPD; |
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frame->version = 1; |
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frame->length = HDMI_SPD_INFOFRAME_SIZE; |
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len = strlen(vendor); |
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memcpy(frame->vendor, vendor, min(len, sizeof(frame->vendor))); |
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len = strlen(product); |
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memcpy(frame->product, product, min(len, sizeof(frame->product))); |
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return 0; |
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} |
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EXPORT_SYMBOL(hdmi_spd_infoframe_init); |
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static int hdmi_spd_infoframe_check_only(const struct hdmi_spd_infoframe *frame) |
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{ |
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if (frame->type != HDMI_INFOFRAME_TYPE_SPD || |
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frame->version != 1 || |
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frame->length != HDMI_SPD_INFOFRAME_SIZE) |
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return -EINVAL; |
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return 0; |
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} |
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/** |
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* hdmi_spd_infoframe_check() - check a HDMI SPD infoframe |
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* @frame: HDMI SPD infoframe |
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* |
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* Validates that the infoframe is consistent and updates derived fields |
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* (eg. length) based on other fields. |
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* |
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* Returns 0 on success or a negative error code on failure. |
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*/ |
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int hdmi_spd_infoframe_check(struct hdmi_spd_infoframe *frame) |
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{ |
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return hdmi_spd_infoframe_check_only(frame); |
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} |
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EXPORT_SYMBOL(hdmi_spd_infoframe_check); |
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/** |
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* hdmi_spd_infoframe_pack_only() - write HDMI SPD infoframe to binary buffer |
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* @frame: HDMI SPD infoframe |
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* @buffer: destination buffer |
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* @size: size of buffer |
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* |
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* Packs the information contained in the @frame structure into a binary |
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* representation that can be written into the corresponding controller |
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* registers. Also computes the checksum as required by section 5.3.5 of |
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* the HDMI 1.4 specification. |
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* |
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* Returns the number of bytes packed into the binary buffer or a negative |
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* error code on failure. |
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*/ |
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ssize_t hdmi_spd_infoframe_pack_only(const struct hdmi_spd_infoframe *frame, |
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void *buffer, size_t size) |
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{ |
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u8 *ptr = buffer; |
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size_t length; |
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int ret; |
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ret = hdmi_spd_infoframe_check_only(frame); |
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if (ret) |
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return ret; |
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length = HDMI_INFOFRAME_HEADER_SIZE + frame->length; |
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if (size < length) |
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return -ENOSPC; |
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memset(buffer, 0, size); |
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ptr[0] = frame->type; |
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ptr[1] = frame->version; |
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ptr[2] = frame->length; |
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ptr[3] = 0; /* checksum */ |
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/* start infoframe payload */ |
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ptr += HDMI_INFOFRAME_HEADER_SIZE; |
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memcpy(ptr, frame->vendor, sizeof(frame->vendor)); |
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memcpy(ptr + 8, frame->product, sizeof(frame->product)); |
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ptr[24] = frame->sdi; |
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hdmi_infoframe_set_checksum(buffer, length); |
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return length; |
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} |
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EXPORT_SYMBOL(hdmi_spd_infoframe_pack_only); |
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/** |
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* hdmi_spd_infoframe_pack() - check a HDMI SPD infoframe, |
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* and write it to binary buffer |
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* @frame: HDMI SPD infoframe |
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* @buffer: destination buffer |
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* @size: size of buffer |
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* |
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* Validates that the infoframe is consistent and updates derived fields |
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* (eg. length) based on other fields, after which it packs the information |
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* contained in the @frame structure into a binary representation that |
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* can be written into the corresponding controller registers. This function |
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* also computes the checksum as required by section 5.3.5 of the HDMI 1.4 |
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* specification. |
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* |
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* Returns the number of bytes packed into the binary buffer or a negative |
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* error code on failure. |
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*/ |
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ssize_t hdmi_spd_infoframe_pack(struct hdmi_spd_infoframe *frame, |
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void *buffer, size_t size) |
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{ |
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int ret; |
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ret = hdmi_spd_infoframe_check(frame); |
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if (ret) |
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return ret; |
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return hdmi_spd_infoframe_pack_only(frame, buffer, size); |
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} |
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EXPORT_SYMBOL(hdmi_spd_infoframe_pack); |
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/** |
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* hdmi_audio_infoframe_init() - initialize an HDMI audio infoframe |
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* @frame: HDMI audio infoframe |
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* |
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* Returns 0 on success or a negative error code on failure. |
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*/ |
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int hdmi_audio_infoframe_init(struct hdmi_audio_infoframe *frame) |
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{ |
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memset(frame, 0, sizeof(*frame)); |
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frame->type = HDMI_INFOFRAME_TYPE_AUDIO; |
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frame->version = 1; |
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frame->length = HDMI_AUDIO_INFOFRAME_SIZE; |
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return 0; |
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} |
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EXPORT_SYMBOL(hdmi_audio_infoframe_init); |
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static int hdmi_audio_infoframe_check_only(const struct hdmi_audio_infoframe *frame) |
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{ |
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if (frame->type != HDMI_INFOFRAME_TYPE_AUDIO || |
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frame->version != 1 || |
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frame->length != HDMI_AUDIO_INFOFRAME_SIZE) |
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return -EINVAL; |
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return 0; |
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} |
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/** |
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* hdmi_audio_infoframe_check() - check a HDMI audio infoframe |
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* @frame: HDMI audio infoframe |
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* |
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* Validates that the infoframe is consistent and updates derived fields |
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* (eg. length) based on other fields. |
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* |
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* Returns 0 on success or a negative error code on failure. |
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*/ |
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int hdmi_audio_infoframe_check(struct hdmi_audio_infoframe *frame) |
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{ |
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return hdmi_audio_infoframe_check_only(frame); |
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} |
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EXPORT_SYMBOL(hdmi_audio_infoframe_check); |
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/** |
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* hdmi_audio_infoframe_pack_only() - write HDMI audio infoframe to binary buffer |
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* @frame: HDMI audio infoframe |
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* @buffer: destination buffer |
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* @size: size of buffer |
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* |
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* Packs the information contained in the @frame structure into a binary |
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* representation that can be written into the corresponding controller |
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* registers. Also computes the checksum as required by section 5.3.5 of |
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* the HDMI 1.4 specification. |
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* |
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* Returns the number of bytes packed into the binary buffer or a negative |
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* error code on failure. |
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*/ |
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ssize_t hdmi_audio_infoframe_pack_only(const struct hdmi_audio_infoframe *frame, |
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void *buffer, size_t size) |
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{ |
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unsigned char channels; |
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u8 *ptr = buffer; |
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size_t length; |
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int ret; |
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ret = hdmi_audio_infoframe_check_only(frame); |
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if (ret) |
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return ret; |
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length = HDMI_INFOFRAME_HEADER_SIZE + frame->length; |
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if (size < length) |
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return -ENOSPC; |
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memset(buffer, 0, size); |
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if (frame->channels >= 2) |
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channels = frame->channels - 1; |
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else |
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channels = 0; |
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ptr[0] = frame->type; |
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ptr[1] = frame->version; |
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ptr[2] = frame->length; |
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ptr[3] = 0; /* checksum */ |
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/* start infoframe payload */ |
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ptr += HDMI_INFOFRAME_HEADER_SIZE; |
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ptr[0] = ((frame->coding_type & 0xf) << 4) | (channels & 0x7); |
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ptr[1] = ((frame->sample_frequency & 0x7) << 2) | |
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(frame->sample_size & 0x3); |
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ptr[2] = frame->coding_type_ext & 0x1f; |
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ptr[3] = frame->channel_allocation; |
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ptr[4] = (frame->level_shift_value & 0xf) << 3; |
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if (frame->downmix_inhibit) |
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ptr[4] |= BIT(7); |
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hdmi_infoframe_set_checksum(buffer, length); |
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return length; |
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} |
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EXPORT_SYMBOL(hdmi_audio_infoframe_pack_only); |
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/** |
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* hdmi_audio_infoframe_pack() - check a HDMI Audio infoframe, |
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* and write it to binary buffer |
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* @frame: HDMI Audio infoframe |
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* @buffer: destination buffer |
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* @size: size of buffer |
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* |
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* Validates that the infoframe is consistent and updates derived fields |
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* (eg. length) based on other fields, after which it packs the information |
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* contained in the @frame structure into a binary representation that |
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* can be written into the corresponding controller registers. This function |
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* also computes the checksum as required by section 5.3.5 of the HDMI 1.4 |
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* specification. |
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* |
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* Returns the number of bytes packed into the binary buffer or a negative |
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* error code on failure. |
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*/ |
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ssize_t hdmi_audio_infoframe_pack(struct hdmi_audio_infoframe *frame, |
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void *buffer, size_t size) |
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{ |
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int ret; |
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ret = hdmi_audio_infoframe_check(frame); |
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if (ret) |
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return ret; |
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return hdmi_audio_infoframe_pack_only(frame, buffer, size); |
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} |
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EXPORT_SYMBOL(hdmi_audio_infoframe_pack); |
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/** |
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* hdmi_vendor_infoframe_init() - initialize an HDMI vendor infoframe |
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* @frame: HDMI vendor infoframe |
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* |
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* Returns 0 on success or a negative error code on failure. |
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*/ |
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int hdmi_vendor_infoframe_init(struct hdmi_vendor_infoframe *frame) |
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{ |
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memset(frame, 0, sizeof(*frame)); |
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frame->type = HDMI_INFOFRAME_TYPE_VENDOR; |
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frame->version = 1; |
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frame->oui = HDMI_IEEE_OUI; |
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/* |
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* 0 is a valid value for s3d_struct, so we use a special "not set" |
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* value |
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*/ |
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frame->s3d_struct = HDMI_3D_STRUCTURE_INVALID; |
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frame->length = HDMI_VENDOR_INFOFRAME_SIZE; |
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return 0; |
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} |
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EXPORT_SYMBOL(hdmi_vendor_infoframe_init); |
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static int hdmi_vendor_infoframe_length(const struct hdmi_vendor_infoframe *frame) |
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{ |
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/* for side by side (half) we also need to provide 3D_Ext_Data */ |
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if (frame->s3d_struct >= HDMI_3D_STRUCTURE_SIDE_BY_SIDE_HALF) |
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return 6; |
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else if (frame->vic != 0 || frame->s3d_struct != HDMI_3D_STRUCTURE_INVALID) |
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return 5; |
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else |
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return 4; |
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} |
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static int hdmi_vendor_infoframe_check_only(const struct hdmi_vendor_infoframe *frame) |
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{ |
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if (frame->type != HDMI_INFOFRAME_TYPE_VENDOR || |
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frame->version != 1 || |
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frame->oui != HDMI_IEEE_OUI) |
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return -EINVAL; |
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|
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/* only one of those can be supplied */ |
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if (frame->vic != 0 && frame->s3d_struct != HDMI_3D_STRUCTURE_INVALID) |
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return -EINVAL; |
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if (frame->length != hdmi_vendor_infoframe_length(frame)) |
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return -EINVAL; |
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return 0; |
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} |
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/** |
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* hdmi_vendor_infoframe_check() - check a HDMI vendor infoframe |
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* @frame: HDMI infoframe |
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* |
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* Validates that the infoframe is consistent and updates derived fields |
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* (eg. length) based on other fields. |
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* |
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* Returns 0 on success or a negative error code on failure. |
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*/ |
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int hdmi_vendor_infoframe_check(struct hdmi_vendor_infoframe *frame) |
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{ |
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frame->length = hdmi_vendor_infoframe_length(frame); |
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return hdmi_vendor_infoframe_check_only(frame); |
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} |
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EXPORT_SYMBOL(hdmi_vendor_infoframe_check); |
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|
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/** |
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* hdmi_vendor_infoframe_pack_only() - write a HDMI vendor infoframe to binary buffer |
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* @frame: HDMI infoframe |
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* @buffer: destination buffer |
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* @size: size of buffer |
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* |
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* Packs the information contained in the @frame structure into a binary |
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* representation that can be written into the corresponding controller |
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* registers. Also computes the checksum as required by section 5.3.5 of |
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* the HDMI 1.4 specification. |
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* |
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* Returns the number of bytes packed into the binary buffer or a negative |
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* error code on failure. |
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*/ |
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ssize_t hdmi_vendor_infoframe_pack_only(const struct hdmi_vendor_infoframe *frame, |
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void *buffer, size_t size) |
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{ |
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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_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_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_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 < 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"; |
|
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 > 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"; |
|
} |
|
|
|
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"; |
|
} |
|
|
|
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"; |
|
} |
|
|
|
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 > 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"; |
|
} |
|
|
|
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) & 0x3; |
|
if (ptr[0] & 0x10) |
|
frame->active_aspect = ptr[1] & 0xf; |
|
if (ptr[0] & 0x8) { |
|
frame->top_bar = (ptr[6] << 8) | ptr[5]; |
|
frame->bottom_bar = (ptr[8] << 8) | ptr[7]; |
|
} |
|
if (ptr[0] & 0x4) { |
|
frame->left_bar = (ptr[10] << 8) | ptr[9]; |
|
frame->right_bar = (ptr[12] << 8) | ptr[11]; |
|
} |
|
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_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] != 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_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] & 0x7; |
|
frame->metadata_type = ptr[1] & 0x7; |
|
|
|
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);
|
|
|