4 files changed, 543 insertions, 0 deletions

diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
index 09f1a18c1adf..b11eeab94151 100644
--- a/drivers/video/Kconfig
+++ b/drivers/video/Kconfig
@@ -52,6 +52,9 @@ config OF_VIDEOMODE
         help
           helper to get videomodes from the devicetree
 
+config HDMI
+        bool
+
 menuconfig FB
         tristate "Support for frame buffer devices"
         ---help---
diff --git a/drivers/video/Makefile b/drivers/video/Makefile
index f592f3b32ec7..0b50082635e3 100644
--- a/drivers/video/Makefile
+++ b/drivers/video/Makefile
@@ -5,6 +5,7 @@
 # Each configuration option enables a list of files.
 
 obj-$(CONFIG_VGASTATE)            += vgastate.o
+obj-$(CONFIG_HDMI)                += hdmi.o
 obj-y                             += fb_notify.o
 obj-$(CONFIG_FB)                  += fb.o
 fb-y                              := fbmem.o fbmon.o fbcmap.o fbsysfs.o \
diff --git a/drivers/video/hdmi.c b/drivers/video/hdmi.c
new file mode 100644
index 000000000000..ab23c9b79143
--- /dev/null
+++ b/drivers/video/hdmi.c
@@ -0,0 +1,308 @@
+/*
+ * Copyright (C) 2012 Avionic Design GmbH
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/bitops.h>
+#include <linux/errno.h>
+#include <linux/export.h>
+#include <linux/hdmi.h>
+#include <linux/string.h>
+
+static void hdmi_infoframe_checksum(void *buffer, size_t size)
+{
+        u8 *ptr = buffer;
+        u8 csum = 0;
+        size_t i;
+
+        /* compute checksum */
+        for (i = 0; i < size; i++)
+                csum += ptr[i];
+
+        ptr[3] = 256 - csum;
+}
+
+/**
+ * hdmi_avi_infoframe_init() - initialize an HDMI AVI infoframe
+ * @frame: HDMI AVI infoframe
+ *
+ * Returns 0 on success or a negative error code on failure.
+ */
+int hdmi_avi_infoframe_init(struct hdmi_avi_infoframe *frame)
+{
+        memset(frame, 0, sizeof(*frame));
+
+        frame->type = HDMI_INFOFRAME_TYPE_AVI;
+        frame->version = 2;
+        frame->length = 13;
+
+        return 0;
+}
+EXPORT_SYMBOL(hdmi_avi_infoframe_init);
+
+/**
+ * hdmi_avi_infoframe_pack() - 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(struct hdmi_avi_infoframe *frame, void *buffer,
+                                size_t size)
+{
+        u8 *ptr = buffer;
+        size_t length;
+
+        length = HDMI_INFOFRAME_HEADER_SIZE + frame->length;
+
+        if (size < length)
+                return -ENOSPC;
+
+        memset(buffer, 0, length);
+
+        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);
+
+        if (frame->active_info_valid)
+                ptr[0] |= BIT(4);
+
+        if (frame->horizontal_bar_valid)
+                ptr[0] |= BIT(3);
+
+        if (frame->vertical_bar_valid)
+                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_checksum(buffer, length);
+
+        return length;
+}
+EXPORT_SYMBOL(hdmi_avi_infoframe_pack);
+
+/**
+ * hdmi_spd_infoframe_init() - initialize an HDMI SPD infoframe
+ * @frame: HDMI SPD infoframe
+ * @vendor: vendor string
+ * @product: product string
+ *
+ * Returns 0 on success or a negative error code on failure.
+ */
+int hdmi_spd_infoframe_init(struct hdmi_spd_infoframe *frame,
+                            const char *vendor, const char *product)
+{
+        memset(frame, 0, sizeof(*frame));
+
+        frame->type = HDMI_INFOFRAME_TYPE_SPD;
+        frame->version = 1;
+        frame->length = 25;
+
+        strncpy(frame->vendor, vendor, sizeof(frame->vendor));
+        strncpy(frame->product, product, sizeof(frame->product));
+
+        return 0;
+}
+EXPORT_SYMBOL(hdmi_spd_infoframe_init);
+
+/**
+ * hdmi_spd_infoframe_pack() - 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(struct hdmi_spd_infoframe *frame, void *buffer,
+                                size_t size)
+{
+        u8 *ptr = buffer;
+        size_t length;
+
+        length = HDMI_INFOFRAME_HEADER_SIZE + frame->length;
+
+        if (size < length)
+                return -ENOSPC;
+
+        memset(buffer, 0, length);
+
+        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_checksum(buffer, length);
+
+        return length;
+}
+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 = 10;
+
+        return 0;
+}
+EXPORT_SYMBOL(hdmi_audio_infoframe_init);
+
+/**
+ * hdmi_audio_infoframe_pack() - 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(struct hdmi_audio_infoframe *frame,
+                                  void *buffer, size_t size)
+{
+        unsigned char channels;
+        u8 *ptr = buffer;
+        size_t length;
+
+        length = HDMI_INFOFRAME_HEADER_SIZE + frame->length;
+
+        if (size < length)
+                return -ENOSPC;
+
+        memset(buffer, 0, length);
+
+        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_checksum(buffer, length);
+
+        return length;
+}
+EXPORT_SYMBOL(hdmi_audio_infoframe_pack);
+
+/**
+ * hdmi_vendor_infoframe_pack() - write a HDMI vendor infoframe to binary
+ *                                buffer
+ * @frame: HDMI vendor infoframe
+ * @buffer: destination buffer
+ * @size: size of buffer
+ *
+ * Packs the information contained in the @frame structure into a binary
+ * representation that can be written into the corresponding controller
+ * registers. Also computes the checksum as required by section 5.3.5 of
+ * the HDMI 1.4 specification.
+ *
+ * Returns the number of bytes packed into the binary buffer or a negative
+ * error code on failure.
+ */
+ssize_t hdmi_vendor_infoframe_pack(struct hdmi_vendor_infoframe *frame,
+                                   void *buffer, size_t size)
+{
+        u8 *ptr = buffer;
+        size_t length;
+
+        length = HDMI_INFOFRAME_HEADER_SIZE + frame->length;
+
+        if (size < length)
+                return -ENOSPC;
+
+        memset(buffer, 0, length);
+
+        ptr[0] = frame->type;
+        ptr[1] = frame->version;
+        ptr[2] = frame->length;
+        ptr[3] = 0; /* checksum */
+
+        memcpy(&ptr[HDMI_INFOFRAME_HEADER_SIZE], frame->data, frame->length);
+
+        hdmi_infoframe_checksum(buffer, length);
+
+        return length;
+}
+EXPORT_SYMBOL(hdmi_vendor_infoframe_pack);
diff --git a/include/linux/hdmi.h b/include/linux/hdmi.h
new file mode 100644
index 000000000000..3b589440ecfe
--- /dev/null
+++ b/include/linux/hdmi.h
@@ -0,0 +1,231 @@
+/*
+ * Copyright (C) 2012 Avionic Design GmbH
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __LINUX_HDMI_H_
+#define __LINUX_HDMI_H_
+
+#include <linux/types.h>
+
+enum hdmi_infoframe_type {
+        HDMI_INFOFRAME_TYPE_VENDOR = 0x81,
+        HDMI_INFOFRAME_TYPE_AVI = 0x82,
+        HDMI_INFOFRAME_TYPE_SPD = 0x83,
+        HDMI_INFOFRAME_TYPE_AUDIO = 0x84,
+};
+
+#define HDMI_INFOFRAME_HEADER_SIZE  4
+#define HDMI_AVI_INFOFRAME_SIZE    13
+#define HDMI_SPD_INFOFRAME_SIZE    25
+#define HDMI_AUDIO_INFOFRAME_SIZE  10
+
+enum hdmi_colorspace {
+        HDMI_COLORSPACE_RGB,
+        HDMI_COLORSPACE_YUV422,
+        HDMI_COLORSPACE_YUV444,
+};
+
+enum hdmi_scan_mode {
+        HDMI_SCAN_MODE_NONE,
+        HDMI_SCAN_MODE_OVERSCAN,
+        HDMI_SCAN_MODE_UNDERSCAN,
+};
+
+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,
+};
+
+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_ADOBE_YCC_601,
+        HDMI_EXTENDED_COLORIMETRY_ADOBE_RGB,
+};
+
+enum hdmi_quantization_range {
+        HDMI_QUANTIZATION_RANGE_DEFAULT,
+        HDMI_QUANTIZATION_RANGE_LIMITED,
+        HDMI_QUANTIZATION_RANGE_FULL,
+};
+
+/* 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_NONE,
+        HDMI_CONTENT_TYPE_PHOTO,
+        HDMI_CONTENT_TYPE_CINEMA,
+        HDMI_CONTENT_TYPE_GAME,
+};
+
+struct hdmi_avi_infoframe {
+        enum hdmi_infoframe_type type;
+        unsigned char version;
+        unsigned char length;
+        enum hdmi_colorspace colorspace;
+        bool active_info_valid;
+        bool horizontal_bar_valid;
+        bool vertical_bar_valid;
+        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;
+};
+
+int 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);
+
+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);
+
+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,
+};
+
+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 {
+        HDMI_AUDIO_CODING_TYPE_EXT_STREAM,
+        HDMI_AUDIO_CODING_TYPE_EXT_HE_AAC,
+        HDMI_AUDIO_CODING_TYPE_EXT_HE_AAC_V2,
+        HDMI_AUDIO_CODING_TYPE_EXT_MPEG_SURROUND,
+};
+
+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);
+
+struct hdmi_vendor_infoframe {
+        enum hdmi_infoframe_type type;
+        unsigned char version;
+        unsigned char length;
+        u8 data[27];
+};
+
+ssize_t hdmi_vendor_infoframe_pack(struct hdmi_vendor_infoframe *frame,
+                                   void *buffer, size_t size);
+
+#endif /* _DRM_HDMI_H */