ASoC: Intel: sof_sdw: add support for Bluetooth offload

This patch enables BT offload feature on TGL Volteer reference design.

Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Signed-off-by: Yong Zhi <yong.zhi@intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20210505163705.305616-8-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/intel/boards/sof_sdw.c b/sound/soc/intel/boards/sof_sdw.c
index d65e29a..9b32d72 100644 (file)
--- a/sound/soc/intel/boards/sof_sdw.c
+++ b/sound/soc/intel/boards/sof_sdw.c
@@ -147,7 +147,9 @@ static const struct dmi_system_id sof_sdw_quirk_table[] = {
                },
                .driver_data = (void *)(SOF_SDW_TGL_HDMI |
                                        SOF_SDW_PCH_DMIC |
-                                       SOF_SDW_FOUR_SPK),
+                                       SOF_SDW_FOUR_SPK |
+                                       SOF_BT_OFFLOAD_SSP(2) |
+                                       SOF_SSP_BT_OFFLOAD_PRESENT),
        },
        {
                .callback = sof_sdw_quirk_cb,
@@ -977,6 +979,9 @@ static int sof_card_dai_links_create(struct device *dev,
        dmic_num = (sof_sdw_quirk & SOF_SDW_PCH_DMIC || mach_params->dmic_num) ? 2 : 0;
        comp_num += dmic_num;
 
+       if (sof_sdw_quirk & SOF_SSP_BT_OFFLOAD_PRESENT)
+               comp_num++;
+
        dev_dbg(dev, "sdw %d, ssp %d, dmic %d, hdmi %d", sdw_be_num, ssp_num,
                dmic_num, ctx->idisp_codec ? hdmi_num : 0);
 
@@ -1162,6 +1167,31 @@ HDMI:
                INC_ID(be_id, cpu_id, link_id);
        }
 
+       if (sof_sdw_quirk & SOF_SSP_BT_OFFLOAD_PRESENT) {
+               int port = (sof_sdw_quirk & SOF_BT_OFFLOAD_SSP_MASK) >>
+                               SOF_BT_OFFLOAD_SSP_SHIFT;
+
+               name = devm_kasprintf(dev, GFP_KERNEL, "SSP%d-BT", port);
+               if (!name)
+                       return -ENOMEM;
+
+               ssp_components = devm_kzalloc(dev, sizeof(*ssp_components),
+                                               GFP_KERNEL);
+               if (!ssp_components)
+                       return -ENOMEM;
+
+               ssp_components->name = "snd-soc-dummy";
+               ssp_components->dai_name = "snd-soc-dummy-dai";
+
+               cpu_name = devm_kasprintf(dev, GFP_KERNEL, "SSP%d Pin", port);
+               if (!cpu_name)
+                       return -ENOMEM;
+
+               cpus[cpu_id].dai_name = cpu_name;
+               init_dai_link(dev, links + link_id, be_id, name, 1, 1,
+                               cpus + cpu_id, 1, ssp_components, 1, NULL, NULL);
+       }
+
        card->dai_link = links;
        card->num_links = num_links;
 

diff --git a/sound/soc/intel/boards/sof_sdw_common.h b/sound/soc/intel/boards/sof_sdw_common.h
index ea60e8e..37ae3a1 100644 (file)
--- a/sound/soc/intel/boards/sof_sdw_common.h
+++ b/sound/soc/intel/boards/sof_sdw_common.h
@@ -50,6 +50,13 @@ enum {
 #define SOF_RT715_DAI_ID_FIX           BIT(11)
 #define SOF_SDW_NO_AGGREGATION         BIT(12)
 
+/* BT audio offload: reserve 3 bits for future */
+#define SOF_BT_OFFLOAD_SSP_SHIFT       13
+#define SOF_BT_OFFLOAD_SSP_MASK        (GENMASK(15, 13))
+#define SOF_BT_OFFLOAD_SSP(quirk)      \
+       (((quirk) << SOF_BT_OFFLOAD_SSP_SHIFT) & SOF_BT_OFFLOAD_SSP_MASK)
+#define SOF_SSP_BT_OFFLOAD_PRESENT     BIT(16)
+
 struct sof_sdw_codec_info {
        const int part_id;
        const int version_id;