hal: Add support for parsing hdmi edid information

Add support for parsing hdmi edid data and setting channel map
to asm
Parse edid data on hdmi connection and invalidat on disconnection.
Fix audio playback errors on HDMI when source channel count is
greater than sink channel count for offload playback.

Change-Id: I1e0a8335611a87974cb273431659938a0b345e68

1 files changed, 96 insertions, 0 deletions

diff --git a/hal/edid.h b/hal/edid.h
new file mode 100644
index 00000000..ec83ec80
--- /dev/null
+++ b/hal/edid.h
@@ -0,0 +1,96 @@
+/*
+ * Copyright (c) 2014, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above
+ *    copyright notice, this list of conditions and the following
+ *    disclaimer in the documentation and/or other materials provided
+ *    with the distribution.
+ *  * Neither the name of The Linux Foundation nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef EDID_H
+#define EDID_H
+
+/* HDMI EDID Information */
+#define BIT(nr)     (1UL << (nr))
+#define MAX_EDID_BLOCKS 10
+#define MAX_SHORT_AUDIO_DESC_CNT        30
+#define MIN_AUDIO_DESC_LENGTH           3
+#define MIN_SPKR_ALLOCATION_DATA_LENGTH 3
+#define MAX_CHANNELS_SUPPORTED          8
+#define MAX_DISPLAY_DEVICES             3
+#define MAX_FRAME_BUFFER_NAME_SIZE      80
+#define MAX_CHAR_PER_INT                13
+
+#define PCM_CHANNEL_FL    1  /* Front left channel.                           */
+#define PCM_CHANNEL_FR    2  /* Front right channel.                          */
+#define PCM_CHANNEL_FC    3  /* Front center channel.                         */
+#define PCM_CHANNEL_LS    4  /* Left surround channel.                        */
+#define PCM_CHANNEL_RS    5  /* Right surround channel.                       */
+#define PCM_CHANNEL_LFE   6  /* Low frequency effect channel.                 */
+#define PCM_CHANNEL_CS    7  /* Center surround channel; Rear center channel. */
+#define PCM_CHANNEL_LB    8  /* Left back channel; Rear left channel.         */
+#define PCM_CHANNEL_RB    9  /* Right back channel; Rear right channel.       */
+#define PCM_CHANNEL_TS   10  /* Top surround channel.                         */
+#define PCM_CHANNEL_CVH  11  /* Center vertical height channel.               */
+#define PCM_CHANNEL_MS   12  /* Mono surround channel.                        */
+#define PCM_CHANNEL_FLC  13  /* Front left of center.                         */
+#define PCM_CHANNEL_FRC  14  /* Front right of center.                        */
+#define PCM_CHANNEL_RLC  15  /* Rear left of center.                          */
+#define PCM_CHANNEL_RRC  16  /* Rear right of center.                         */
+
+#define MAX_HDMI_CHANNEL_CNT 8
+
+typedef enum edid_audio_format_id {
+    LPCM = 1,
+    AC3,
+    MPEG1,
+    MP3,
+    MPEG2_MULTI_CHANNEL,
+    AAC,
+    DTS,
+    ATRAC,
+    SACD,
+    DOLBY_DIGITAL_PLUS,
+    DTS_HD,
+    MAT,
+    DST,
+    WMA_PRO
+} edid_audio_format_id;
+
+typedef struct edid_audio_block_info {
+    edid_audio_format_id format_id;
+    int sampling_freq;
+    int bits_per_sample;
+    int channels;
+} edid_audio_block_info;
+
+typedef struct edid_audio_info {
+    int audio_blocks;
+    unsigned char speaker_allocation[MIN_SPKR_ALLOCATION_DATA_LENGTH];
+    edid_audio_block_info audio_blocks_array[MAX_EDID_BLOCKS];
+    char channel_map[MAX_CHANNELS_SUPPORTED];
+    int  channel_allocation;
+} edid_audio_info;
+
+bool edid_get_sink_caps(edid_audio_info* info, char *edid_data);
+#endif /* EDID_H */