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-rw-r--r--sound/soc/qcom/qdsp6/q6dsp-common.c101
1 files changed, 101 insertions, 0 deletions
diff --git a/sound/soc/qcom/qdsp6/q6dsp-common.c b/sound/soc/qcom/qdsp6/q6dsp-common.c
new file mode 100644
index 0000000000..95585dea2b
--- /dev/null
+++ b/sound/soc/qcom/qdsp6/q6dsp-common.c
@@ -0,0 +1,101 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (c) 2011-2017, The Linux Foundation. All rights reserved.
+// Copyright (c) 2018, Linaro Limited
+
+#include "q6dsp-common.h"
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+
+int q6dsp_map_channels(u8 ch_map[PCM_MAX_NUM_CHANNEL], int ch)
+{
+ memset(ch_map, 0, PCM_MAX_NUM_CHANNEL);
+
+ switch (ch) {
+ case 1:
+ ch_map[0] = PCM_CHANNEL_FC;
+ break;
+ case 2:
+ ch_map[0] = PCM_CHANNEL_FL;
+ ch_map[1] = PCM_CHANNEL_FR;
+ break;
+ case 3:
+ ch_map[0] = PCM_CHANNEL_FL;
+ ch_map[1] = PCM_CHANNEL_FR;
+ ch_map[2] = PCM_CHANNEL_FC;
+ break;
+ case 4:
+ ch_map[0] = PCM_CHANNEL_FL;
+ ch_map[1] = PCM_CHANNEL_FR;
+ ch_map[2] = PCM_CHANNEL_LS;
+ ch_map[3] = PCM_CHANNEL_RS;
+ break;
+ case 5:
+ ch_map[0] = PCM_CHANNEL_FL;
+ ch_map[1] = PCM_CHANNEL_FR;
+ ch_map[2] = PCM_CHANNEL_FC;
+ ch_map[3] = PCM_CHANNEL_LS;
+ ch_map[4] = PCM_CHANNEL_RS;
+ break;
+ case 6:
+ ch_map[0] = PCM_CHANNEL_FL;
+ ch_map[1] = PCM_CHANNEL_FR;
+ ch_map[2] = PCM_CHANNEL_LFE;
+ ch_map[3] = PCM_CHANNEL_FC;
+ ch_map[4] = PCM_CHANNEL_LS;
+ ch_map[5] = PCM_CHANNEL_RS;
+ break;
+ case 8:
+ ch_map[0] = PCM_CHANNEL_FL;
+ ch_map[1] = PCM_CHANNEL_FR;
+ ch_map[2] = PCM_CHANNEL_LFE;
+ ch_map[3] = PCM_CHANNEL_FC;
+ ch_map[4] = PCM_CHANNEL_LS;
+ ch_map[5] = PCM_CHANNEL_RS;
+ ch_map[6] = PCM_CHANNEL_LB;
+ ch_map[7] = PCM_CHANNEL_RB;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(q6dsp_map_channels);
+
+int q6dsp_get_channel_allocation(int channels)
+{
+ int channel_allocation;
+
+ /* HDMI spec CEA-861-E: Table 28 Audio InfoFrame Data Byte 4 */
+ switch (channels) {
+ case 2:
+ channel_allocation = 0;
+ break;
+ case 3:
+ channel_allocation = 0x02;
+ break;
+ case 4:
+ channel_allocation = 0x06;
+ break;
+ case 5:
+ channel_allocation = 0x0A;
+ break;
+ case 6:
+ channel_allocation = 0x0B;
+ break;
+ case 7:
+ channel_allocation = 0x12;
+ break;
+ case 8:
+ channel_allocation = 0x13;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return channel_allocation;
+}
+EXPORT_SYMBOL_GPL(q6dsp_get_channel_allocation);
+MODULE_LICENSE("GPL v2");