new file mode 100644
@@ -0,0 +1,65 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright(c) 2023 Intel Corporation. All rights reserved.
+ *
+ * Authors: Cezary Rojewski <cezary.rojewski@intel.com>
+ * Amadeusz Slawinski <amadeuszx.slawinski@linux.intel.com>
+ */
+
+#ifndef __SOUND_SOC_INTEL_AVS_UTILS_H
+#define __SOUND_SOC_INTEL_AVS_UTILS_H
+
+#include <sound/soc-acpi.h>
+
+inline bool avs_mach_singular_ssp(struct snd_soc_acpi_mach *mach)
+{
+ return hweight_long(mach->mach_params.i2s_link_mask) == 1;
+}
+
+inline u32 avs_mach_ssp_port(struct snd_soc_acpi_mach *mach)
+{
+ return __ffs(mach->mach_params.i2s_link_mask);
+}
+
+inline bool avs_mach_singular_tdm(struct snd_soc_acpi_mach *mach, u32 port)
+{
+ unsigned long *tdms = mach->pdata;
+
+ return !tdms || (hweight_long(tdms[port]) == 1);
+}
+
+inline u32 avs_mach_ssp_tdm(struct snd_soc_acpi_mach *mach, u32 port)
+{
+ unsigned long *tdms = mach->pdata;
+
+ return tdms ? __ffs(tdms[port]) : 0;
+}
+
+inline int avs_mach_get_ssp_tdm(struct device *dev, struct snd_soc_acpi_mach *mach,
+ int *ssp_port, int *tdm_slot)
+{
+ int port;
+
+ if (!avs_mach_singular_ssp(mach)) {
+ dev_err(dev, "Invalid SSP configuration\n");
+ return -EINVAL;
+ }
+ port = avs_mach_ssp_port(mach);
+
+ if (!avs_mach_singular_tdm(mach, port)) {
+ dev_err(dev, "Invalid TDM configuration\n");
+ return -EINVAL;
+ }
+ *ssp_port = port;
+ *tdm_slot = avs_mach_ssp_tdm(mach, *ssp_port);
+
+ return 0;
+}
+
+/*
+ * Macro to easily generate format strings
+ */
+#define AVS_STRING_FMT(prefix, suffix, ssp, tdm) \
+ (tdm) ? prefix "%d:%d" suffix : prefix "%d" suffix, (ssp), (tdm)
+
+#endif
In quite a few places in code there are checks for number of SSPs present on system, to reduce maintenance burden introduce helper functions allowing to get SSP and TDM from machine board configuration. Additionally in boards we use SSP and TDM to generate quite a few strings, it could be done like: if (tdms) dl->name = devm_kasprintf(dev, GFP_KERNEL, "SSP%d:%d-Codec", ssp_port, tdm_slot); else dl->name = devm_kasprintf(dev, GFP_KERNEL, "SSP%d-Codec", ssp_port); but quite quickly code ends up with spaghetti of similar if elses. Instead introduce macro which can be used to generate correct string, allowing to minimize code to something like: dl->name = devm_kasprintf(dev, GFP_KERNEL, AVS_STRING_FMT("SSP", "-Codec", ssp_port, tdm_slot)); Reviewed-by: Cezary Rojewski <cezary.rojewski@intel.com> Signed-off-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com> --- sound/soc/intel/avs/utils.h | 65 +++++++++++++++++++++++++++++++++++++ 1 file changed, 65 insertions(+) create mode 100644 sound/soc/intel/avs/utils.h