Abstract the DMA and Codec DAI ops for the BE DAI widgets #3972

ranj063 · 2022-10-30T00:02:46Z

Introduce SOF DAI ops to abstract the BE DAI widget DMA, codec_dai and dai_config ops. This change will allow adding the chained DMA mode or the DSP-less mode for the BE DAI widgets with a simple change like this:

diff --git a/sound/soc/sof/intel/hda-dai-ops.c b/sound/soc/sof/intel/hda-dai-ops.c
index 1d1e238d032e..1be992367a89 100644
--- a/sound/soc/sof/intel/hda-dai-ops.c
+++ b/sound/soc/sof/intel/hda-dai-ops.c
@@ -433,10 +433,19 @@ void hda_set_dai_widget_ops(struct snd_sof_dev *sdev, struct snd_sof_widget *swi
        }
        case SOF_INTEL_IPC4:
        {
+               struct snd_sof_widget *pipe_widget = swidget->pipe_widget;
                struct sof_ipc4_copier *ipc4_copier = sdai->private;
+               struct sof_ipc4_pipeline *pipeline = pipe_widget->private;
+               struct snd_sof_dai_dma_ops *dma_ops = sdai->ops->dma_ops;
+
+               if (ipc4_copier->dai_type != SOF_DAI_INTEL_HDA)
+                       break;
+
+               if (pipeline->use_chain_dma) {
+                       dma_ops->pre_trigger = NULL;
+                       dma_ops->post_trigger = NULL;
+               }
 
-               if (ipc4_copier->dai_type == SOF_DAI_INTEL_HDA)
-                       sdai->ops = &hda_ipc4_dai_ops;
                break;
        }
        default:

plbossart

@ranj063 I think you're on to something with the .pre and .post trigger.

I added a bunch of comments to try and help clarify the code, most of the changes are confusing due to naming aliases to different concepts.

sound/soc/sof/intel/hda-dai.c

sound/soc/sof/sof-audio.h

sound/soc/sof/intel/hda-dai-ops.c

plbossart · 2022-10-31T16:25:32Z

sound/soc/sof/intel/hda-dai.c

this is a bit confusion, if the ops are the same between IPC and IPC4 why do wee need the switch()?

for SSP and the NHLT for IPC4

plbossart · 2022-10-31T16:27:59Z

sound/soc/sof/intel/hda-dai.c

I didn't really follow how the hw_free and post-trigger were related. The naming points to different phases in the ALSA world.

For IPC3, post_trigger does what hda_dai_hw_free_ipc(). For IPC4 also, we were doing the same and it made no sense. SO this patch actually fixes it

bardliao · 2022-11-01T10:58:39Z

sound/soc/sof/intel/hda-dai.c

one variable per line?

they are not initialized, so this is fine.

it's still better to have one variable per line for consistency.

sound/soc/sof/intel/hda-dai.c

sound/soc/sof/intel/hda-dai-ops.c

sound/soc/sof/intel/hda-dai.c

sound/soc/sof/sof-audio.h

plbossart

LGTM, we should probably do more testing overnight to see if we have any regressions, this is a rather intrusive patch.

Nice work @ranj063, I think this will help a lot clarify the sequences which were diluted with different ops and branches left and right.

plbossart · 2022-11-17T01:05:24Z

@ujfalusi @RanderWang @bardliao @kv2019i @jsarha please prioritize this PR if you have a bit of time on Thursday 16, we are trying to complete this work before the Thanksgiving break. Friday will be too late for any interaction.

RanderWang · 2022-11-17T05:25:50Z

sound/soc/sof/intel/hda-dai.c

%#x to print hex number ? It does not block me.

RanderWang · 2022-11-17T05:30:54Z

sound/soc/sof/intel/hda-dai.c

I like the layout

unsigned int flags = SOF_DAI_CONFIG_FLAGS_HW_PARAMS; struct snd_sof_dai_config_data data = { 0 }; struct hdac_ext_stream *hext_stream;

RanderWang · 2022-11-17T05:38:10Z

sound/soc/sof/intel/hda-dai.c

why we need to init nhlt in hda_set_dai_drv_ops ? It is not a issue in this PR. we remove the switch for ipc version but leave one if for ipc version

RanderWang

LGTM

ujfalusi

@ranj063, this looks really nice!
The only thing holding me to Approve is that I can not follow optionality in struct hda_dai_widget_dma_ops.
assign_hext_stream is as mandatory as the get_hext_stream, which also brings the release_hext_stream as mandatory.
By the look, the other ops are really optional.

sound/soc/sof/intel/hda-dai-ops.c

ujfalusi · 2022-11-17T08:00:50Z

sound/soc/sof/intel/hda-dai.c

nitpick: I would print error when the get_ext_stream is missing to make it more obvious.

ujfalusi · 2022-11-17T08:08:24Z

sound/soc/sof/intel/hda-dai.c

You got me here...
Only get_hext_stream is mandatory, which is to to retrieve the dma_data set by the optional assign_hext_stream.
If the assign_hext_stream is not set (optional!) and this is the first call here then the get_hext_stream is going to return with NULL and you are not going to get anything but NULL...

What I was saying is that most, if not all callbacks in struct hda_dai_widget_dma_ops are in fact mandatory, don't they?

also to note: you also must have the release_hext_stream defined if you have the assign_hext_stream, but you must need to have the assign_hext_stream in order to have working stack.

or you should not return with error in line 118?

The conclusion for this thread is that assign/release need to be optional because couple mode will not need them

ujfalusi · 2022-11-17T08:13:41Z

sound/soc/sof/intel/hda-dai.c

nitpick: would look better two lines down..

ujfalusi

@ranj063, I'm OK with few fixups (checkpatch).
Let's see how this will behave in the wild and under the DSPless and ChainDMA cases.

Introduce a new ops structure for HDA DAI widget DMA ops and add a new field to struct snd_sof_dai that will be used to set the ops pointer for DAI widgets. Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>

Define and set the get_hext_stream, assign_hext_stream and release_hext_stream DMA ops for HDA DAIs. Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>

…A ops Define and use the setup_hext_stream/reset_hext_stream DMA ops during link hw_params and cleanup. Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>

Use the topology IPC dai_config to update the dai_config for HDA DAI widgets. Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>

Define and use the SOF widget's DMA pre_trigger/trigger/post_trigger ops in ipc4_hda_dai_trigger(). Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>

Define the post_trigger DMA op for IPC3 and unify the DAI driver ops for IPC3 and IPC4 for HDA DAI's. Also, use the post_trigger op to stop the paused streams properly in the hda_dai_suspend() function. This fixes the suspend while paused case for IPC4 because previously we weren't resetting the pipeline when suspending the system with some paused streams. Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>

Remove these functions and reuse hda_dai_config(). Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>

ranj063 requested review from RanderWang, ajitkupandey, bardliao, dbaluta, juimonen, kuanhsuncheng, kv2019i, lgirdwood, libinyang, lyakh, plbossart, ujfalusi and yaochunhung as code owners October 30, 2022 00:02

ranj063 force-pushed the fix/hda_dai_hw_params branch 7 times, most recently from 787fa0e to e945284 Compare October 30, 2022 17:34

plbossart reviewed Oct 31, 2022

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ranj063 force-pushed the fix/hda_dai_hw_params branch from e945284 to d56c49b Compare October 31, 2022 17:37

ranj063 requested a review from plbossart October 31, 2022 17:37

ranj063 force-pushed the fix/hda_dai_hw_params branch from d56c49b to ba07eb1 Compare October 31, 2022 18:08

bardliao reviewed Nov 1, 2022

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plbossart previously approved these changes Nov 17, 2022

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ranj063 added 7 commits November 17, 2022 06:28

ASoC: SOF: Intel: hda-dai: Introduce DAI widget ops

d249846

Introduce a new ops structure for HDA DAI widget DMA ops and add a new field to struct snd_sof_dai that will be used to set the ops pointer for DAI widgets. Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>

ASoC: SOF: Intel: hda-dai: Define and set the HDA DAI widget DMA ops

78b470f

Define and set the get_hext_stream, assign_hext_stream and release_hext_stream DMA ops for HDA DAIs. Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>

ASoC: SOF: Intel: hda-dai: Add setup_hext_stream/reset_hext_stream DM…

b070e78

…A ops Define and use the setup_hext_stream/reset_hext_stream DMA ops during link hw_params and cleanup. Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>

ASoC: SOF: hda-dai: Use the topology IPC dai_config op

bf8e962

Use the topology IPC dai_config to update the dai_config for HDA DAI widgets. Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>

ASoC: SOF: Intel: hda-dai: Define DAI widget DMA trigger ops for IPC4

153dca4

Define and use the SOF widget's DMA pre_trigger/trigger/post_trigger ops in ipc4_hda_dai_trigger(). Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>

ASoC: SOF: Intel: hda: Remove hda_ctrl_dai_widget_setup/free()

ee710ae

Remove these functions and reuse hda_dai_config(). Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>

ranj063 dismissed stale reviews from ujfalusi, RanderWang, bardliao, and plbossart via ee710ae November 17, 2022 14:29

ranj063 force-pushed the fix/hda_dai_hw_params branch from 5c11a0f to ee710ae Compare November 17, 2022 14:29

bardliao approved these changes Nov 17, 2022

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plbossart approved these changes Nov 17, 2022

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plbossart requested review from RanderWang and ujfalusi November 17, 2022 14:33

ujfalusi approved these changes Nov 17, 2022

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RanderWang approved these changes Nov 18, 2022

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plbossart merged commit 1197769 into thesofproject:topic/sof-dev Nov 18, 2022

plbossart mentioned this pull request Nov 18, 2022

ASoC: SOF: (Intel HDA) Add support for DSPless debug mode #3962

Merged

ranj063 deleted the fix/hda_dai_hw_params branch November 19, 2022 00:54

Abstract the DMA and Codec DAI ops for the BE DAI widgets #3972

Abstract the DMA and Codec DAI ops for the BE DAI widgets #3972

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