git: f1d7ae31d4aa - main - linuxkpi: Add hdmi helpers
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Date: Tue, 28 Mar 2023 07:25:05 UTC
The branch main has been updated by manu:
URL: https://cgit.FreeBSD.org/src/commit/?id=f1d7ae31d4aa7b352611c43a9fb3b04986cff622
commit f1d7ae31d4aa7b352611c43a9fb3b04986cff622
Author: Emmanuel Vadot <manu@FreeBSD.org>
AuthorDate: 2023-03-16 15:12:12 +0000
Commit: Emmanuel Vadot <manu@FreeBSD.org>
CommitDate: 2023-03-28 07:11:06 +0000
linuxkpi: Add hdmi helpers
This is a direct port of the Linux code as the licence allows it, so
style(9) isn't respected to allow applying directly the upstream commits.
Do not add it to linuxkpi directly but add a new linuxkpi_hdmi module
that drm modules will require later, no need to bloat linuxkpi more.
Sponsored by: Beckhoff Automation GmbH & Co. KG
Differential Revision: https://reviews.freebsd.org/D39122
---
sys/compat/linuxkpi/common/include/linux/hdmi.h | 440 ++++++
sys/compat/linuxkpi/common/src/linux_hdmi.c | 1922 +++++++++++++++++++++++
sys/modules/Makefile | 1 +
sys/modules/linuxkpi_hdmi/Makefile | 13 +
4 files changed, 2376 insertions(+)
diff --git a/sys/compat/linuxkpi/common/include/linux/hdmi.h b/sys/compat/linuxkpi/common/include/linux/hdmi.h
new file mode 100644
index 000000000000..c8ec982ff498
--- /dev/null
+++ b/sys/compat/linuxkpi/common/include/linux/hdmi.h
@@ -0,0 +1,440 @@
+/*
+ * Copyright (C) 2012 Avionic Design GmbH
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sub license,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef __LINUX_HDMI_H_
+#define __LINUX_HDMI_H_
+
+#include <linux/types.h>
+#include <linux/device.h>
+
+enum hdmi_packet_type {
+ HDMI_PACKET_TYPE_NULL = 0x00,
+ HDMI_PACKET_TYPE_AUDIO_CLOCK_REGEN = 0x01,
+ HDMI_PACKET_TYPE_AUDIO_SAMPLE = 0x02,
+ HDMI_PACKET_TYPE_GENERAL_CONTROL = 0x03,
+ HDMI_PACKET_TYPE_ACP = 0x04,
+ HDMI_PACKET_TYPE_ISRC1 = 0x05,
+ HDMI_PACKET_TYPE_ISRC2 = 0x06,
+ HDMI_PACKET_TYPE_ONE_BIT_AUDIO_SAMPLE = 0x07,
+ HDMI_PACKET_TYPE_DST_AUDIO = 0x08,
+ HDMI_PACKET_TYPE_HBR_AUDIO_STREAM = 0x09,
+ HDMI_PACKET_TYPE_GAMUT_METADATA = 0x0a,
+ /* + enum hdmi_infoframe_type */
+};
+
+enum hdmi_infoframe_type {
+ HDMI_INFOFRAME_TYPE_VENDOR = 0x81,
+ HDMI_INFOFRAME_TYPE_AVI = 0x82,
+ HDMI_INFOFRAME_TYPE_SPD = 0x83,
+ HDMI_INFOFRAME_TYPE_AUDIO = 0x84,
+ HDMI_INFOFRAME_TYPE_DRM = 0x87,
+};
+
+#define HDMI_IEEE_OUI 0x000c03
+#define HDMI_FORUM_IEEE_OUI 0xc45dd8
+#define HDMI_INFOFRAME_HEADER_SIZE 4
+#define HDMI_AVI_INFOFRAME_SIZE 13
+#define HDMI_SPD_INFOFRAME_SIZE 25
+#define HDMI_AUDIO_INFOFRAME_SIZE 10
+#define HDMI_DRM_INFOFRAME_SIZE 26
+#define HDMI_VENDOR_INFOFRAME_SIZE 4
+
+#define HDMI_INFOFRAME_SIZE(type) \
+ (HDMI_INFOFRAME_HEADER_SIZE + HDMI_ ## type ## _INFOFRAME_SIZE)
+
+struct hdmi_any_infoframe {
+ enum hdmi_infoframe_type type;
+ unsigned char version;
+ unsigned char length;
+};
+
+enum hdmi_colorspace {
+ HDMI_COLORSPACE_RGB,
+ HDMI_COLORSPACE_YUV422,
+ HDMI_COLORSPACE_YUV444,
+ HDMI_COLORSPACE_YUV420,
+ HDMI_COLORSPACE_RESERVED4,
+ HDMI_COLORSPACE_RESERVED5,
+ HDMI_COLORSPACE_RESERVED6,
+ HDMI_COLORSPACE_IDO_DEFINED,
+};
+
+enum hdmi_scan_mode {
+ HDMI_SCAN_MODE_NONE,
+ HDMI_SCAN_MODE_OVERSCAN,
+ HDMI_SCAN_MODE_UNDERSCAN,
+ HDMI_SCAN_MODE_RESERVED,
+};
+
+enum hdmi_colorimetry {
+ HDMI_COLORIMETRY_NONE,
+ HDMI_COLORIMETRY_ITU_601,
+ HDMI_COLORIMETRY_ITU_709,
+ HDMI_COLORIMETRY_EXTENDED,
+};
+
+enum hdmi_picture_aspect {
+ HDMI_PICTURE_ASPECT_NONE,
+ HDMI_PICTURE_ASPECT_4_3,
+ HDMI_PICTURE_ASPECT_16_9,
+ HDMI_PICTURE_ASPECT_64_27,
+ HDMI_PICTURE_ASPECT_256_135,
+ HDMI_PICTURE_ASPECT_RESERVED,
+};
+
+enum hdmi_active_aspect {
+ HDMI_ACTIVE_ASPECT_16_9_TOP = 2,
+ HDMI_ACTIVE_ASPECT_14_9_TOP = 3,
+ HDMI_ACTIVE_ASPECT_16_9_CENTER = 4,
+ HDMI_ACTIVE_ASPECT_PICTURE = 8,
+ HDMI_ACTIVE_ASPECT_4_3 = 9,
+ HDMI_ACTIVE_ASPECT_16_9 = 10,
+ HDMI_ACTIVE_ASPECT_14_9 = 11,
+ HDMI_ACTIVE_ASPECT_4_3_SP_14_9 = 13,
+ HDMI_ACTIVE_ASPECT_16_9_SP_14_9 = 14,
+ HDMI_ACTIVE_ASPECT_16_9_SP_4_3 = 15,
+};
+
+enum hdmi_extended_colorimetry {
+ HDMI_EXTENDED_COLORIMETRY_XV_YCC_601,
+ HDMI_EXTENDED_COLORIMETRY_XV_YCC_709,
+ HDMI_EXTENDED_COLORIMETRY_S_YCC_601,
+ HDMI_EXTENDED_COLORIMETRY_OPYCC_601,
+ HDMI_EXTENDED_COLORIMETRY_OPRGB,
+
+ /* The following EC values are only defined in CEA-861-F. */
+ HDMI_EXTENDED_COLORIMETRY_BT2020_CONST_LUM,
+ HDMI_EXTENDED_COLORIMETRY_BT2020,
+ HDMI_EXTENDED_COLORIMETRY_RESERVED,
+};
+
+enum hdmi_quantization_range {
+ HDMI_QUANTIZATION_RANGE_DEFAULT,
+ HDMI_QUANTIZATION_RANGE_LIMITED,
+ HDMI_QUANTIZATION_RANGE_FULL,
+ HDMI_QUANTIZATION_RANGE_RESERVED,
+};
+
+/* non-uniform picture scaling */
+enum hdmi_nups {
+ HDMI_NUPS_UNKNOWN,
+ HDMI_NUPS_HORIZONTAL,
+ HDMI_NUPS_VERTICAL,
+ HDMI_NUPS_BOTH,
+};
+
+enum hdmi_ycc_quantization_range {
+ HDMI_YCC_QUANTIZATION_RANGE_LIMITED,
+ HDMI_YCC_QUANTIZATION_RANGE_FULL,
+};
+
+enum hdmi_content_type {
+ HDMI_CONTENT_TYPE_GRAPHICS,
+ HDMI_CONTENT_TYPE_PHOTO,
+ HDMI_CONTENT_TYPE_CINEMA,
+ HDMI_CONTENT_TYPE_GAME,
+};
+
+enum hdmi_metadata_type {
+ HDMI_STATIC_METADATA_TYPE1 = 0,
+};
+
+enum hdmi_eotf {
+ HDMI_EOTF_TRADITIONAL_GAMMA_SDR,
+ HDMI_EOTF_TRADITIONAL_GAMMA_HDR,
+ HDMI_EOTF_SMPTE_ST2084,
+ HDMI_EOTF_BT_2100_HLG,
+};
+
+struct hdmi_avi_infoframe {
+ enum hdmi_infoframe_type type;
+ unsigned char version;
+ unsigned char length;
+ enum hdmi_colorspace colorspace;
+ enum hdmi_scan_mode scan_mode;
+ enum hdmi_colorimetry colorimetry;
+ enum hdmi_picture_aspect picture_aspect;
+ enum hdmi_active_aspect active_aspect;
+ bool itc;
+ enum hdmi_extended_colorimetry extended_colorimetry;
+ enum hdmi_quantization_range quantization_range;
+ enum hdmi_nups nups;
+ unsigned char video_code;
+ enum hdmi_ycc_quantization_range ycc_quantization_range;
+ enum hdmi_content_type content_type;
+ unsigned char pixel_repeat;
+ unsigned short top_bar;
+ unsigned short bottom_bar;
+ unsigned short left_bar;
+ unsigned short right_bar;
+};
+
+/* DRM Infoframe as per CTA 861.G spec */
+struct hdmi_drm_infoframe {
+ enum hdmi_infoframe_type type;
+ unsigned char version;
+ unsigned char length;
+ enum hdmi_eotf eotf;
+ enum hdmi_metadata_type metadata_type;
+ struct {
+ u16 x, y;
+ } display_primaries[3];
+ struct {
+ u16 x, y;
+ } white_point;
+ u16 max_display_mastering_luminance;
+ u16 min_display_mastering_luminance;
+ u16 max_cll;
+ u16 max_fall;
+};
+
+void hdmi_avi_infoframe_init(struct hdmi_avi_infoframe *frame);
+ssize_t hdmi_avi_infoframe_pack(struct hdmi_avi_infoframe *frame, void *buffer,
+ size_t size);
+ssize_t hdmi_avi_infoframe_pack_only(const struct hdmi_avi_infoframe *frame,
+ void *buffer, size_t size);
+int hdmi_avi_infoframe_check(struct hdmi_avi_infoframe *frame);
+int hdmi_drm_infoframe_init(struct hdmi_drm_infoframe *frame);
+ssize_t hdmi_drm_infoframe_pack(struct hdmi_drm_infoframe *frame, void *buffer,
+ size_t size);
+ssize_t hdmi_drm_infoframe_pack_only(const struct hdmi_drm_infoframe *frame,
+ void *buffer, size_t size);
+int hdmi_drm_infoframe_check(struct hdmi_drm_infoframe *frame);
+int hdmi_drm_infoframe_unpack_only(struct hdmi_drm_infoframe *frame,
+ const void *buffer, size_t size);
+
+enum hdmi_spd_sdi {
+ HDMI_SPD_SDI_UNKNOWN,
+ HDMI_SPD_SDI_DSTB,
+ HDMI_SPD_SDI_DVDP,
+ HDMI_SPD_SDI_DVHS,
+ HDMI_SPD_SDI_HDDVR,
+ HDMI_SPD_SDI_DVC,
+ HDMI_SPD_SDI_DSC,
+ HDMI_SPD_SDI_VCD,
+ HDMI_SPD_SDI_GAME,
+ HDMI_SPD_SDI_PC,
+ HDMI_SPD_SDI_BD,
+ HDMI_SPD_SDI_SACD,
+ HDMI_SPD_SDI_HDDVD,
+ HDMI_SPD_SDI_PMP,
+};
+
+struct hdmi_spd_infoframe {
+ enum hdmi_infoframe_type type;
+ unsigned char version;
+ unsigned char length;
+ char vendor[8];
+ char product[16];
+ enum hdmi_spd_sdi sdi;
+};
+
+int hdmi_spd_infoframe_init(struct hdmi_spd_infoframe *frame,
+ const char *vendor, const char *product);
+ssize_t hdmi_spd_infoframe_pack(struct hdmi_spd_infoframe *frame, void *buffer,
+ size_t size);
+ssize_t hdmi_spd_infoframe_pack_only(const struct hdmi_spd_infoframe *frame,
+ void *buffer, size_t size);
+int hdmi_spd_infoframe_check(struct hdmi_spd_infoframe *frame);
+
+enum hdmi_audio_coding_type {
+ HDMI_AUDIO_CODING_TYPE_STREAM,
+ HDMI_AUDIO_CODING_TYPE_PCM,
+ HDMI_AUDIO_CODING_TYPE_AC3,
+ HDMI_AUDIO_CODING_TYPE_MPEG1,
+ HDMI_AUDIO_CODING_TYPE_MP3,
+ HDMI_AUDIO_CODING_TYPE_MPEG2,
+ HDMI_AUDIO_CODING_TYPE_AAC_LC,
+ HDMI_AUDIO_CODING_TYPE_DTS,
+ HDMI_AUDIO_CODING_TYPE_ATRAC,
+ HDMI_AUDIO_CODING_TYPE_DSD,
+ HDMI_AUDIO_CODING_TYPE_EAC3,
+ HDMI_AUDIO_CODING_TYPE_DTS_HD,
+ HDMI_AUDIO_CODING_TYPE_MLP,
+ HDMI_AUDIO_CODING_TYPE_DST,
+ HDMI_AUDIO_CODING_TYPE_WMA_PRO,
+ HDMI_AUDIO_CODING_TYPE_CXT,
+};
+
+enum hdmi_audio_sample_size {
+ HDMI_AUDIO_SAMPLE_SIZE_STREAM,
+ HDMI_AUDIO_SAMPLE_SIZE_16,
+ HDMI_AUDIO_SAMPLE_SIZE_20,
+ HDMI_AUDIO_SAMPLE_SIZE_24,
+};
+
+enum hdmi_audio_sample_frequency {
+ HDMI_AUDIO_SAMPLE_FREQUENCY_STREAM,
+ HDMI_AUDIO_SAMPLE_FREQUENCY_32000,
+ HDMI_AUDIO_SAMPLE_FREQUENCY_44100,
+ HDMI_AUDIO_SAMPLE_FREQUENCY_48000,
+ HDMI_AUDIO_SAMPLE_FREQUENCY_88200,
+ HDMI_AUDIO_SAMPLE_FREQUENCY_96000,
+ HDMI_AUDIO_SAMPLE_FREQUENCY_176400,
+ HDMI_AUDIO_SAMPLE_FREQUENCY_192000,
+};
+
+enum hdmi_audio_coding_type_ext {
+ /* Refer to Audio Coding Type (CT) field in Data Byte 1 */
+ HDMI_AUDIO_CODING_TYPE_EXT_CT,
+
+ /*
+ * The next three CXT values are defined in CEA-861-E only.
+ * They do not exist in older versions, and in CEA-861-F they are
+ * defined as 'Not in use'.
+ */
+ HDMI_AUDIO_CODING_TYPE_EXT_HE_AAC,
+ HDMI_AUDIO_CODING_TYPE_EXT_HE_AAC_V2,
+ HDMI_AUDIO_CODING_TYPE_EXT_MPEG_SURROUND,
+
+ /* The following CXT values are only defined in CEA-861-F. */
+ HDMI_AUDIO_CODING_TYPE_EXT_MPEG4_HE_AAC,
+ HDMI_AUDIO_CODING_TYPE_EXT_MPEG4_HE_AAC_V2,
+ HDMI_AUDIO_CODING_TYPE_EXT_MPEG4_AAC_LC,
+ HDMI_AUDIO_CODING_TYPE_EXT_DRA,
+ HDMI_AUDIO_CODING_TYPE_EXT_MPEG4_HE_AAC_SURROUND,
+ HDMI_AUDIO_CODING_TYPE_EXT_MPEG4_AAC_LC_SURROUND = 10,
+};
+
+struct hdmi_audio_infoframe {
+ enum hdmi_infoframe_type type;
+ unsigned char version;
+ unsigned char length;
+ unsigned char channels;
+ enum hdmi_audio_coding_type coding_type;
+ enum hdmi_audio_sample_size sample_size;
+ enum hdmi_audio_sample_frequency sample_frequency;
+ enum hdmi_audio_coding_type_ext coding_type_ext;
+ unsigned char channel_allocation;
+ unsigned char level_shift_value;
+ bool downmix_inhibit;
+
+};
+
+int hdmi_audio_infoframe_init(struct hdmi_audio_infoframe *frame);
+ssize_t hdmi_audio_infoframe_pack(struct hdmi_audio_infoframe *frame,
+ void *buffer, size_t size);
+ssize_t hdmi_audio_infoframe_pack_only(const struct hdmi_audio_infoframe *frame,
+ void *buffer, size_t size);
+int hdmi_audio_infoframe_check(struct hdmi_audio_infoframe *frame);
+
+enum hdmi_3d_structure {
+ HDMI_3D_STRUCTURE_INVALID = -1,
+ HDMI_3D_STRUCTURE_FRAME_PACKING = 0,
+ HDMI_3D_STRUCTURE_FIELD_ALTERNATIVE,
+ HDMI_3D_STRUCTURE_LINE_ALTERNATIVE,
+ HDMI_3D_STRUCTURE_SIDE_BY_SIDE_FULL,
+ HDMI_3D_STRUCTURE_L_DEPTH,
+ HDMI_3D_STRUCTURE_L_DEPTH_GFX_GFX_DEPTH,
+ HDMI_3D_STRUCTURE_TOP_AND_BOTTOM,
+ HDMI_3D_STRUCTURE_SIDE_BY_SIDE_HALF = 8,
+};
+
+
+struct hdmi_vendor_infoframe {
+ enum hdmi_infoframe_type type;
+ unsigned char version;
+ unsigned char length;
+ unsigned int oui;
+ u8 vic;
+ enum hdmi_3d_structure s3d_struct;
+ unsigned int s3d_ext_data;
+};
+
+/* HDR Metadata as per 861.G spec */
+struct hdr_static_metadata {
+ __u8 eotf;
+ __u8 metadata_type;
+ __u16 max_cll;
+ __u16 max_fall;
+ __u16 min_cll;
+};
+
+/**
+ * struct hdr_sink_metadata - HDR sink metadata
+ *
+ * Metadata Information read from Sink's EDID
+ */
+struct hdr_sink_metadata {
+ /**
+ * @metadata_type: Static_Metadata_Descriptor_ID.
+ */
+ __u32 metadata_type;
+ /**
+ * @hdmi_type1: HDR Metadata Infoframe.
+ */
+ union {
+ struct hdr_static_metadata hdmi_type1;
+ };
+};
+
+int hdmi_vendor_infoframe_init(struct hdmi_vendor_infoframe *frame);
+ssize_t hdmi_vendor_infoframe_pack(struct hdmi_vendor_infoframe *frame,
+ void *buffer, size_t size);
+ssize_t hdmi_vendor_infoframe_pack_only(const struct hdmi_vendor_infoframe *frame,
+ void *buffer, size_t size);
+int hdmi_vendor_infoframe_check(struct hdmi_vendor_infoframe *frame);
+
+union hdmi_vendor_any_infoframe {
+ struct {
+ enum hdmi_infoframe_type type;
+ unsigned char version;
+ unsigned char length;
+ unsigned int oui;
+ } any;
+ struct hdmi_vendor_infoframe hdmi;
+};
+
+/**
+ * union hdmi_infoframe - overall union of all abstract infoframe representations
+ * @any: generic infoframe
+ * @avi: avi infoframe
+ * @spd: spd infoframe
+ * @vendor: union of all vendor infoframes
+ * @audio: audio infoframe
+ * @drm: Dynamic Range and Mastering infoframe
+ *
+ * This is used by the generic pack function. This works since all infoframes
+ * have the same header which also indicates which type of infoframe should be
+ * packed.
+ */
+union hdmi_infoframe {
+ struct hdmi_any_infoframe any;
+ struct hdmi_avi_infoframe avi;
+ struct hdmi_spd_infoframe spd;
+ union hdmi_vendor_any_infoframe vendor;
+ struct hdmi_audio_infoframe audio;
+ struct hdmi_drm_infoframe drm;
+};
+
+ssize_t hdmi_infoframe_pack(union hdmi_infoframe *frame, void *buffer,
+ size_t size);
+ssize_t hdmi_infoframe_pack_only(const union hdmi_infoframe *frame,
+ void *buffer, size_t size);
+int hdmi_infoframe_check(union hdmi_infoframe *frame);
+int hdmi_infoframe_unpack(union hdmi_infoframe *frame,
+ const void *buffer, size_t size);
+void hdmi_infoframe_log(const char *level, struct device *dev,
+ const union hdmi_infoframe *frame);
+
+#endif /* _DRM_HDMI_H */
diff --git a/sys/compat/linuxkpi/common/src/linux_hdmi.c b/sys/compat/linuxkpi/common/src/linux_hdmi.c
new file mode 100644
index 000000000000..5a9b5c552e49
--- /dev/null
+++ b/sys/compat/linuxkpi/common/src/linux_hdmi.c
@@ -0,0 +1,1922 @@
+/*
+ * Copyright (C) 2012 Avionic Design GmbH
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sub license,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#ifdef __FreeBSD__
+#include <sys/cdefs.h>
+#include <sys/param.h>
+#include <sys/module.h>
+#endif
+
+#include <linux/bitops.h>
+#include <linux/bug.h>
+#include <linux/errno.h>
+#include <linux/export.h>
+#include <linux/hdmi.h>
+#include <linux/string.h>
+#include <linux/device.h>
+
+#define hdmi_log(fmt, ...) dev_printk(level, dev, fmt, ##__VA_ARGS__)
+
+static u8 hdmi_infoframe_checksum(const u8 *ptr, size_t size)
+{
+ u8 csum = 0;
+ size_t i;
+
+ /* compute checksum */
+ for (i = 0; i < size; i++)
+ csum += ptr[i];
+
+ return 256 - csum;
+}
+
+static void hdmi_infoframe_set_checksum(void *buffer, size_t size)
+{
+ u8 *ptr = buffer;
+
+ ptr[3] = hdmi_infoframe_checksum(buffer, size);
+}
+
+/**
+ * hdmi_avi_infoframe_init() - initialize an HDMI AVI infoframe
+ * @frame: HDMI AVI infoframe
+ */
+void hdmi_avi_infoframe_init(struct hdmi_avi_infoframe *frame)
+{
+ memset(frame, 0, sizeof(*frame));
+
+ frame->type = HDMI_INFOFRAME_TYPE_AVI;
+ frame->version = 2;
+ frame->length = HDMI_AVI_INFOFRAME_SIZE;
+}
+EXPORT_SYMBOL(hdmi_avi_infoframe_init);
+
+static int hdmi_avi_infoframe_check_only(const struct hdmi_avi_infoframe *frame)
+{
+ if (frame->type != HDMI_INFOFRAME_TYPE_AVI ||
+ frame->version != 2 ||
+ frame->length != HDMI_AVI_INFOFRAME_SIZE)
+ return -EINVAL;
+
+ if (frame->picture_aspect > HDMI_PICTURE_ASPECT_16_9)
+ return -EINVAL;
+
+ return 0;
+}
+
+/**
+ * hdmi_avi_infoframe_check() - check a HDMI AVI infoframe
+ * @frame: HDMI AVI infoframe
+ *
+ * Validates that the infoframe is consistent and updates derived fields
+ * (eg. length) based on other fields.
+ *
+ * Returns 0 on success or a negative error code on failure.
+ */
+int hdmi_avi_infoframe_check(struct hdmi_avi_infoframe *frame)
+{
+ return hdmi_avi_infoframe_check_only(frame);
+}
+EXPORT_SYMBOL(hdmi_avi_infoframe_check);
+
+/**
+ * hdmi_avi_infoframe_pack_only() - write HDMI AVI infoframe to binary buffer
+ * @frame: HDMI AVI infoframe
+ * @buffer: destination buffer
+ * @size: size of buffer
+ *
+ * Packs the information contained in the @frame structure into a binary
+ * representation that can be written into the corresponding controller
+ * registers. Also computes the checksum as required by section 5.3.5 of
+ * the HDMI 1.4 specification.
+ *
+ * Returns the number of bytes packed into the binary buffer or a negative
+ * error code on failure.
+ */
+ssize_t hdmi_avi_infoframe_pack_only(const struct hdmi_avi_infoframe *frame,
+ void *buffer, size_t size)
+{
+ u8 *ptr = buffer;
+ size_t length;
+ int ret;
+
+ ret = hdmi_avi_infoframe_check_only(frame);
+ if (ret)
+ return ret;
+
+ length = HDMI_INFOFRAME_HEADER_SIZE + frame->length;
+
+ if (size < length)
+ return -ENOSPC;
+
+ memset(buffer, 0, size);
+
+ ptr[0] = frame->type;
+ ptr[1] = frame->version;
+ ptr[2] = frame->length;
+ ptr[3] = 0; /* checksum */
+
+ /* start infoframe payload */
+ ptr += HDMI_INFOFRAME_HEADER_SIZE;
+
+ ptr[0] = ((frame->colorspace & 0x3) << 5) | (frame->scan_mode & 0x3);
+
+ /*
+ * Data byte 1, bit 4 has to be set if we provide the active format
+ * aspect ratio
+ */
+ if (frame->active_aspect & 0xf)
+ ptr[0] |= BIT(4);
+
+ /* Bit 3 and 2 indicate if we transmit horizontal/vertical bar data */
+ if (frame->top_bar || frame->bottom_bar)
+ ptr[0] |= BIT(3);
+
+ if (frame->left_bar || frame->right_bar)
+ ptr[0] |= BIT(2);
+
+ ptr[1] = ((frame->colorimetry & 0x3) << 6) |
+ ((frame->picture_aspect & 0x3) << 4) |
+ (frame->active_aspect & 0xf);
+
+ ptr[2] = ((frame->extended_colorimetry & 0x7) << 4) |
+ ((frame->quantization_range & 0x3) << 2) |
+ (frame->nups & 0x3);
+
+ if (frame->itc)
+ ptr[2] |= BIT(7);
+
+ ptr[3] = frame->video_code & 0x7f;
+
+ ptr[4] = ((frame->ycc_quantization_range & 0x3) << 6) |
+ ((frame->content_type & 0x3) << 4) |
+ (frame->pixel_repeat & 0xf);
+
+ ptr[5] = frame->top_bar & 0xff;
+ ptr[6] = (frame->top_bar >> 8) & 0xff;
+ ptr[7] = frame->bottom_bar & 0xff;
+ ptr[8] = (frame->bottom_bar >> 8) & 0xff;
+ ptr[9] = frame->left_bar & 0xff;
+ ptr[10] = (frame->left_bar >> 8) & 0xff;
+ ptr[11] = frame->right_bar & 0xff;
+ ptr[12] = (frame->right_bar >> 8) & 0xff;
+
+ hdmi_infoframe_set_checksum(buffer, length);
+
+ return length;
+}
+EXPORT_SYMBOL(hdmi_avi_infoframe_pack_only);
+
+/**
+ * hdmi_avi_infoframe_pack() - check a HDMI AVI infoframe,
+ * and write it to binary buffer
+ * @frame: HDMI AVI infoframe
+ * @buffer: destination buffer
+ * @size: size of buffer
+ *
+ * Validates that the infoframe is consistent and updates derived fields
+ * (eg. length) based on other fields, after which it packs the information
+ * contained in the @frame structure into a binary representation that
+ * can be written into the corresponding controller registers. This function
+ * also computes the checksum as required by section 5.3.5 of the HDMI 1.4
+ * specification.
+ *
+ * Returns the number of bytes packed into the binary buffer or a negative
+ * error code on failure.
+ */
+ssize_t hdmi_avi_infoframe_pack(struct hdmi_avi_infoframe *frame,
+ void *buffer, size_t size)
+{
+ int ret;
+
+ ret = hdmi_avi_infoframe_check(frame);
+ if (ret)
+ return ret;
+
+ return hdmi_avi_infoframe_pack_only(frame, buffer, size);
+}
+EXPORT_SYMBOL(hdmi_avi_infoframe_pack);
+
+/**
+ * hdmi_spd_infoframe_init() - initialize an HDMI SPD infoframe
+ * @frame: HDMI SPD infoframe
+ * @vendor: vendor string
+ * @product: product string
+ *
+ * Returns 0 on success or a negative error code on failure.
+ */
+int hdmi_spd_infoframe_init(struct hdmi_spd_infoframe *frame,
+ const char *vendor, const char *product)
+{
+ size_t len;
+
+ memset(frame, 0, sizeof(*frame));
+
+ frame->type = HDMI_INFOFRAME_TYPE_SPD;
+ frame->version = 1;
+ frame->length = HDMI_SPD_INFOFRAME_SIZE;
+
+ len = strlen(vendor);
+ memcpy(frame->vendor, vendor, min(len, sizeof(frame->vendor)));
+ len = strlen(product);
+ memcpy(frame->product, product, min(len, sizeof(frame->product)));
+
+ return 0;
+}
+EXPORT_SYMBOL(hdmi_spd_infoframe_init);
+
+static int hdmi_spd_infoframe_check_only(const struct hdmi_spd_infoframe *frame)
+{
+ if (frame->type != HDMI_INFOFRAME_TYPE_SPD ||
+ frame->version != 1 ||
+ frame->length != HDMI_SPD_INFOFRAME_SIZE)
+ return -EINVAL;
+
+ return 0;
+}
+
+/**
+ * hdmi_spd_infoframe_check() - check a HDMI SPD infoframe
+ * @frame: HDMI SPD infoframe
+ *
+ * Validates that the infoframe is consistent and updates derived fields
+ * (eg. length) based on other fields.
+ *
+ * Returns 0 on success or a negative error code on failure.
+ */
+int hdmi_spd_infoframe_check(struct hdmi_spd_infoframe *frame)
+{
+ return hdmi_spd_infoframe_check_only(frame);
+}
+EXPORT_SYMBOL(hdmi_spd_infoframe_check);
+
+/**
+ * hdmi_spd_infoframe_pack_only() - write HDMI SPD infoframe to binary buffer
+ * @frame: HDMI SPD infoframe
+ * @buffer: destination buffer
+ * @size: size of buffer
+ *
+ * Packs the information contained in the @frame structure into a binary
+ * representation that can be written into the corresponding controller
+ * registers. Also computes the checksum as required by section 5.3.5 of
+ * the HDMI 1.4 specification.
+ *
+ * Returns the number of bytes packed into the binary buffer or a negative
+ * error code on failure.
+ */
+ssize_t hdmi_spd_infoframe_pack_only(const struct hdmi_spd_infoframe *frame,
+ void *buffer, size_t size)
+{
+ u8 *ptr = buffer;
+ size_t length;
+ int ret;
+
+ ret = hdmi_spd_infoframe_check_only(frame);
+ if (ret)
+ return ret;
+
+ length = HDMI_INFOFRAME_HEADER_SIZE + frame->length;
+
+ if (size < length)
+ return -ENOSPC;
+
+ memset(buffer, 0, size);
+
+ ptr[0] = frame->type;
+ ptr[1] = frame->version;
+ ptr[2] = frame->length;
+ ptr[3] = 0; /* checksum */
+
+ /* start infoframe payload */
+ ptr += HDMI_INFOFRAME_HEADER_SIZE;
+
+ memcpy(ptr, frame->vendor, sizeof(frame->vendor));
+ memcpy(ptr + 8, frame->product, sizeof(frame->product));
+
+ ptr[24] = frame->sdi;
+
+ hdmi_infoframe_set_checksum(buffer, length);
+
+ return length;
+}
+EXPORT_SYMBOL(hdmi_spd_infoframe_pack_only);
+
+/**
+ * hdmi_spd_infoframe_pack() - check a HDMI SPD infoframe,
+ * and write it to binary buffer
+ * @frame: HDMI SPD infoframe
+ * @buffer: destination buffer
+ * @size: size of buffer
+ *
+ * Validates that the infoframe is consistent and updates derived fields
+ * (eg. length) based on other fields, after which it packs the information
+ * contained in the @frame structure into a binary representation that
+ * can be written into the corresponding controller registers. This function
+ * also computes the checksum as required by section 5.3.5 of the HDMI 1.4
+ * specification.
+ *
+ * Returns the number of bytes packed into the binary buffer or a negative
+ * error code on failure.
+ */
+ssize_t hdmi_spd_infoframe_pack(struct hdmi_spd_infoframe *frame,
+ void *buffer, size_t size)
+{
+ int ret;
+
+ ret = hdmi_spd_infoframe_check(frame);
+ if (ret)
+ return ret;
+
+ return hdmi_spd_infoframe_pack_only(frame, buffer, size);
+}
+EXPORT_SYMBOL(hdmi_spd_infoframe_pack);
+
+/**
+ * hdmi_audio_infoframe_init() - initialize an HDMI audio infoframe
+ * @frame: HDMI audio infoframe
+ *
+ * Returns 0 on success or a negative error code on failure.
+ */
+int hdmi_audio_infoframe_init(struct hdmi_audio_infoframe *frame)
+{
+ memset(frame, 0, sizeof(*frame));
+
+ frame->type = HDMI_INFOFRAME_TYPE_AUDIO;
+ frame->version = 1;
+ frame->length = HDMI_AUDIO_INFOFRAME_SIZE;
+
+ return 0;
+}
+EXPORT_SYMBOL(hdmi_audio_infoframe_init);
+
+static int hdmi_audio_infoframe_check_only(const struct hdmi_audio_infoframe *frame)
+{
+ if (frame->type != HDMI_INFOFRAME_TYPE_AUDIO ||
+ frame->version != 1 ||
+ frame->length != HDMI_AUDIO_INFOFRAME_SIZE)
+ return -EINVAL;
+
+ return 0;
+}
+
+/**
+ * hdmi_audio_infoframe_check() - check a HDMI audio infoframe
+ * @frame: HDMI audio infoframe
+ *
+ * Validates that the infoframe is consistent and updates derived fields
+ * (eg. length) based on other fields.
+ *
+ * Returns 0 on success or a negative error code on failure.
+ */
+int hdmi_audio_infoframe_check(struct hdmi_audio_infoframe *frame)
+{
+ return hdmi_audio_infoframe_check_only(frame);
+}
+EXPORT_SYMBOL(hdmi_audio_infoframe_check);
+
+/**
+ * hdmi_audio_infoframe_pack_only() - write HDMI audio infoframe to binary buffer
+ * @frame: HDMI audio infoframe
+ * @buffer: destination buffer
+ * @size: size of buffer
+ *
+ * Packs the information contained in the @frame structure into a binary
+ * representation that can be written into the corresponding controller
+ * registers. Also computes the checksum as required by section 5.3.5 of
+ * the HDMI 1.4 specification.
+ *
+ * Returns the number of bytes packed into the binary buffer or a negative
+ * error code on failure.
+ */
+ssize_t hdmi_audio_infoframe_pack_only(const struct hdmi_audio_infoframe *frame,
+ void *buffer, size_t size)
+{
+ unsigned char channels;
+ u8 *ptr = buffer;
+ size_t length;
+ int ret;
+
+ ret = hdmi_audio_infoframe_check_only(frame);
+ if (ret)
+ return ret;
+
+ length = HDMI_INFOFRAME_HEADER_SIZE + frame->length;
+
+ if (size < length)
+ return -ENOSPC;
+
+ memset(buffer, 0, size);
+
+ if (frame->channels >= 2)
+ channels = frame->channels - 1;
+ else
+ channels = 0;
+
+ ptr[0] = frame->type;
+ ptr[1] = frame->version;
+ ptr[2] = frame->length;
+ ptr[3] = 0; /* checksum */
+
+ /* start infoframe payload */
+ ptr += HDMI_INFOFRAME_HEADER_SIZE;
+
+ ptr[0] = ((frame->coding_type & 0xf) << 4) | (channels & 0x7);
+ ptr[1] = ((frame->sample_frequency & 0x7) << 2) |
+ (frame->sample_size & 0x3);
+ ptr[2] = frame->coding_type_ext & 0x1f;
+ ptr[3] = frame->channel_allocation;
+ ptr[4] = (frame->level_shift_value & 0xf) << 3;
+
+ if (frame->downmix_inhibit)
+ ptr[4] |= BIT(7);
+
+ hdmi_infoframe_set_checksum(buffer, length);
+
+ return length;
+}
+EXPORT_SYMBOL(hdmi_audio_infoframe_pack_only);
+
+/**
+ * hdmi_audio_infoframe_pack() - check a HDMI Audio infoframe,
+ * and write it to binary buffer
+ * @frame: HDMI Audio infoframe
+ * @buffer: destination buffer
+ * @size: size of buffer
+ *
+ * Validates that the infoframe is consistent and updates derived fields
+ * (eg. length) based on other fields, after which it packs the information
+ * contained in the @frame structure into a binary representation that
+ * can be written into the corresponding controller registers. This function
+ * also computes the checksum as required by section 5.3.5 of the HDMI 1.4
+ * specification.
+ *
+ * Returns the number of bytes packed into the binary buffer or a negative
+ * error code on failure.
+ */
+ssize_t hdmi_audio_infoframe_pack(struct hdmi_audio_infoframe *frame,
+ void *buffer, size_t size)
+{
+ int ret;
+
+ ret = hdmi_audio_infoframe_check(frame);
+ if (ret)
+ return ret;
+
+ return hdmi_audio_infoframe_pack_only(frame, buffer, size);
+}
+EXPORT_SYMBOL(hdmi_audio_infoframe_pack);
+
+/**
+ * hdmi_vendor_infoframe_init() - initialize an HDMI vendor infoframe
+ * @frame: HDMI vendor infoframe
+ *
+ * Returns 0 on success or a negative error code on failure.
+ */
+int hdmi_vendor_infoframe_init(struct hdmi_vendor_infoframe *frame)
+{
+ memset(frame, 0, sizeof(*frame));
+
+ frame->type = HDMI_INFOFRAME_TYPE_VENDOR;
+ frame->version = 1;
+
+ frame->oui = HDMI_IEEE_OUI;
+
+ /*
+ * 0 is a valid value for s3d_struct, so we use a special "not set"
+ * value
+ */
+ frame->s3d_struct = HDMI_3D_STRUCTURE_INVALID;
+ frame->length = HDMI_VENDOR_INFOFRAME_SIZE;
+
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