ASoC: Intel: Skylake: Add pipe and modules handlers

SKL driver needs to instantiate pipelines and modules in the DSP.
The topology in the DSP is modelled as DAPM graph with a PGA
representing a module instance and mixer representing a pipeline
for a group of modules along with the mixer itself.

Here we start adding building block for handling these. We add
resource checks (memory/compute) for pipelines, find the modules
in a pipeline, init modules in a pipe and lastly bind/unbind
modules in a pipe These will be used by pipe event handlers in
subsequent patches

Signed-off-by: Jeeja KP <jeeja.kp@intel.com>
Signed-off-by: Subhransu S. Prusty <subhransu.s.prusty@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/intel/skylake/Makefile b/sound/soc/intel/skylake/Makefile
index 27db221..914b6da 100644 (file)
--- a/sound/soc/intel/skylake/Makefile
+++ b/sound/soc/intel/skylake/Makefile
@@ -1,4 +1,5 @@
-snd-soc-skl-objs := skl.o skl-pcm.o skl-nhlt.o skl-messages.o
+snd-soc-skl-objs := skl.o skl-pcm.o skl-nhlt.o skl-messages.o \
+skl-topology.o
 
 obj-$(CONFIG_SND_SOC_INTEL_SKYLAKE) += snd-soc-skl.o
 

diff --git a/sound/soc/intel/skylake/skl-topology.c b/sound/soc/intel/skylake/skl-topology.c
new file mode 100644 (file)
index 0000000..b0ee1fe
--- /dev/null
+++ b/sound/soc/intel/skylake/skl-topology.c
@@ -0,0 +1,187 @@
+/*
+ *  skl-topology.c - Implements Platform component ALSA controls/widget
+ *  handlers.
+ *
+ *  Copyright (C) 2014-2015 Intel Corp
+ *  Author: Jeeja KP <jeeja.kp@intel.com>
+ *  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as version 2, as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ */
+
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <linux/firmware.h>
+#include <sound/soc.h>
+#include <sound/soc-topology.h>
+#include "skl-sst-dsp.h"
+#include "skl-sst-ipc.h"
+#include "skl-topology.h"
+#include "skl.h"
+#include "skl-tplg-interface.h"
+
+/*
+ * SKL DSP driver modelling uses only few DAPM widgets so for rest we will
+ * ignore. This helpers checks if the SKL driver handles this widget type
+ */
+static int is_skl_dsp_widget_type(struct snd_soc_dapm_widget *w)
+{
+       switch (w->id) {
+       case snd_soc_dapm_dai_link:
+       case snd_soc_dapm_dai_in:
+       case snd_soc_dapm_aif_in:
+       case snd_soc_dapm_aif_out:
+       case snd_soc_dapm_dai_out:
+       case snd_soc_dapm_switch:
+               return false;
+       default:
+               return true;
+       }
+}
+
+/*
+ * Each pipelines needs memory to be allocated. Check if we have free memory
+ * from available pool. Then only add this to pool
+ * This is freed when pipe is deleted
+ * Note: DSP does actual memory management we only keep track for complete
+ * pool
+ */
+static bool skl_tplg_alloc_pipe_mem(struct skl *skl,
+                               struct skl_module_cfg *mconfig)
+{
+       struct skl_sst *ctx = skl->skl_sst;
+
+       if (skl->resource.mem + mconfig->pipe->memory_pages >
+                               skl->resource.max_mem) {
+               dev_err(ctx->dev,
+                               "%s: module_id %d instance %d\n", __func__,
+                               mconfig->id.module_id,
+                               mconfig->id.instance_id);
+               dev_err(ctx->dev,
+                               "exceeds ppl memory available %d mem %d\n",
+                               skl->resource.max_mem, skl->resource.mem);
+               return false;
+       }
+
+       skl->resource.mem += mconfig->pipe->memory_pages;
+       return true;
+}
+
+/*
+ * Pipeline needs needs DSP CPU resources for computation, this is
+ * quantified in MCPS (Million Clocks Per Second) required for module/pipe
+ *
+ * Each pipelines needs mcps to be allocated. Check if we have mcps for this
+ * pipe. This adds the mcps to driver counter
+ * This is removed on pipeline delete
+ */
+static bool skl_tplg_alloc_pipe_mcps(struct skl *skl,
+                               struct skl_module_cfg *mconfig)
+{
+       struct skl_sst *ctx = skl->skl_sst;
+
+       if (skl->resource.mcps + mconfig->mcps > skl->resource.max_mcps) {
+               dev_err(ctx->dev,
+                       "%s: module_id %d instance %d\n", __func__,
+                       mconfig->id.module_id, mconfig->id.instance_id);
+               dev_err(ctx->dev,
+                       "exceeds ppl memory available %d > mem %d\n",
+                       skl->resource.max_mcps, skl->resource.mcps);
+               return false;
+       }
+
+       skl->resource.mcps += mconfig->mcps;
+       return true;
+}
+
+/*
+ * Free the mcps when tearing down
+ */
+static void
+skl_tplg_free_pipe_mcps(struct skl *skl, struct skl_module_cfg *mconfig)
+{
+       skl->resource.mcps -= mconfig->mcps;
+}
+
+/*
+ * Free the memory when tearing down
+ */
+static void
+skl_tplg_free_pipe_mem(struct skl *skl, struct skl_module_cfg *mconfig)
+{
+       skl->resource.mem -= mconfig->pipe->memory_pages;
+}
+
+/*
+ * A pipe can have multiple modules, each of them will be a DAPM widget as
+ * well. While managing a pipeline we need to get the list of all the
+ * widgets in a pipelines, so this helper - skl_tplg_get_pipe_widget() helps
+ * to get the SKL type widgets in that pipeline
+ */
+static int skl_tplg_alloc_pipe_widget(struct device *dev,
+       struct snd_soc_dapm_widget *w, struct skl_pipe *pipe)
+{
+       struct skl_module_cfg *src_module = NULL;
+       struct snd_soc_dapm_path *p = NULL;
+       struct skl_pipe_module *p_module = NULL;
+
+       p_module = devm_kzalloc(dev, sizeof(*p_module), GFP_KERNEL);
+       if (!p_module)
+               return -ENOMEM;
+
+       p_module->w = w;
+       list_add_tail(&p_module->node, &pipe->w_list);
+
+       snd_soc_dapm_widget_for_each_sink_path(w, p) {
+               if ((p->sink->priv == NULL)
+                               && (!is_skl_dsp_widget_type(w)))
+                       continue;
+
+               if ((p->sink->priv != NULL) && p->connect
+                               && is_skl_dsp_widget_type(p->sink)) {
+
+                       src_module = p->sink->priv;
+                       if (pipe->ppl_id == src_module->pipe->ppl_id)
+                               skl_tplg_alloc_pipe_widget(dev,
+                                                       p->sink, pipe);
+               }
+       }
+       return 0;
+}
+
+/*
+ * Inside a pipe instance, we can have various modules. These modules need
+ * to instantiated in DSP by invoking INIT_MODULE IPC, which is achieved by
+ * skl_init_module() routine, so invoke that for all modules in a pipeline
+ */
+static int
+skl_tplg_init_pipe_modules(struct skl *skl, struct skl_pipe *pipe)
+{
+       struct skl_pipe_module *w_module;
+       struct snd_soc_dapm_widget *w;
+       struct skl_module_cfg *mconfig;
+       struct skl_sst *ctx = skl->skl_sst;
+       int ret = 0;
+
+       list_for_each_entry(w_module, &pipe->w_list, node) {
+               w = w_module->w;
+               mconfig = w->priv;
+
+               /* check resource available */
+               if (!skl_tplg_alloc_pipe_mcps(skl, mconfig))
+                       return -ENOMEM;
+
+               ret = skl_init_module(ctx, mconfig, NULL);
+               if (ret < 0)
+                       return ret;
+       }
+
+       return 0;
+}

diff --git a/sound/soc/intel/skylake/skl-topology.h b/sound/soc/intel/skylake/skl-topology.h
index 8c7767b..73d7916 100644 (file)
--- a/sound/soc/intel/skylake/skl-topology.h
+++ b/sound/soc/intel/skylake/skl-topology.h
@@ -263,6 +263,16 @@ struct skl_module_cfg {
        struct skl_specific_cfg formats_config;
 };
 
+struct skl_pipeline {
+       struct skl_pipe *pipe;
+       struct list_head node;
+};
+
+struct skl_dapm_path_list {
+       struct snd_soc_dapm_path *dapm_path;
+       struct list_head node;
+};
+
 int skl_create_pipeline(struct skl_sst *ctx, struct skl_pipe *pipe);
 
 int skl_run_pipe(struct skl_sst *ctx, struct skl_pipe *pipe);

diff --git a/sound/soc/intel/skylake/skl.h b/sound/soc/intel/skylake/skl.h
index f7fdbb0..e980d78 100644 (file)
--- a/sound/soc/intel/skylake/skl.h
+++ b/sound/soc/intel/skylake/skl.h
@@ -48,6 +48,13 @@
 #define AZX_REG_VS_SDXEFIFOS_XBASE     0x1094
 #define AZX_REG_VS_SDXEFIFOS_XINTERVAL 0x20
 
+struct skl_dsp_resource {
+       u32 max_mcps;
+       u32 max_mem;
+       u32 mcps;
+       u32 mem;
+};
+
 struct skl {
        struct hdac_ext_bus ebus;
        struct pci_dev *pci;
@@ -57,6 +64,10 @@ struct skl {
 
        void __iomem *nhlt; /* nhlt ptr */
        struct skl_sst *skl_sst; /* sst skl ctx */
+
+       struct skl_dsp_resource resource;
+       struct list_head ppl_list;
+       struct list_head dapm_path_list;
 };
 
 #define skl_to_ebus(s) (&(s)->ebus)