From: Jeeja KP jeeja.kp@intel.com
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 --- sound/soc/intel/skylake/Makefile | 3 +- sound/soc/intel/skylake/skl-topology.c | 198 +++++++++++++++++++++++++++++++++ sound/soc/intel/skylake/skl-topology.h | 10 ++ sound/soc/intel/skylake/skl.h | 11 ++ 4 files changed, 221 insertions(+), 1 deletion(-) create mode 100644 sound/soc/intel/skylake/skl-topology.c
diff --git a/sound/soc/intel/skylake/Makefile b/sound/soc/intel/skylake/Makefile index 27db22178204..914b6dab9bea 100644 --- 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 index 000000000000..0c2d2009540c --- /dev/null +++ b/sound/soc/intel/skylake/skl-topology.c @@ -0,0 +1,198 @@ +/* + * 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_is_pipe_mem_available(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_is_pipe_mcps_available(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; +} + +/* + * 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_get_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) { + dev_dbg(dev, "found widget=%s\n", p->sink->name); + skl_tplg_get_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_is_pipe_mcps_available(skl, mconfig)) + return -ENOMEM; + + ret = skl_init_module(ctx, mconfig, NULL); + if (ret < 0) + return ret; + } + + return 0; +} + +/* + * Once all the modules in a pipe are instantiated, they need to be + * connected. + * On removal, before deleting a pipeline the modules need to disconnected. + * + * This is achieved by binding/unbinding these modules + */ +static int skl_tplg_bind_unbind_pipe_modules(struct skl_sst *ctx, + struct skl_pipe *pipe, bool bind) +{ + struct skl_pipe_module *w_module; + struct skl_module_cfg *src_module = NULL; + struct skl_module_cfg *dst_module; + int ret = 0; + + list_for_each_entry(w_module, &pipe->w_list, node) { + dst_module = w_module->w->priv; + + if (src_module == NULL) { + src_module = dst_module; + continue; + } + + if (bind) + ret = skl_bind_modules(ctx, src_module, dst_module); + else + ret = skl_unbind_modules(ctx, src_module, dst_module); + if (ret < 0) + return ret; + + src_module = dst_module; + } + return 0; +} diff --git a/sound/soc/intel/skylake/skl-topology.h b/sound/soc/intel/skylake/skl-topology.h index 8c7767baa94f..73d7916ee33e 100644 --- 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 f7fdbb02947f..e980d7897642 100644 --- 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)