diff mbox series

ASoC: SOF: Intel: hda-stream: limit PROCEN workaround

Message ID 20210928082248.6081-1-peter.ujfalusi@linux.intel.com (mailing list archive)
State New, archived
Headers show
Series ASoC: SOF: Intel: hda-stream: limit PROCEN workaround | expand

Commit Message

Peter Ujfalusi Sept. 28, 2021, 8:22 a.m. UTC
From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>

The work-around enabled in hda-stream.c is only required on earlier
versions of SOCs/PCH (Skylake, KabyLake, ApolloLake,
GeminiLake). Before setting the format on the host DMA, it is required
to couple the host and link DMA - which as a consequence shall use the
same format.

This patch introduces a quirk field in the platform descriptor and
makes the work-around conditional. Newer platforms have
no limitations on the use of host and link DMA, which can use
different formats.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
---
 sound/soc/sof/intel/apl.c        |  1 +
 sound/soc/sof/intel/hda-stream.c | 18 ++++++++++++------
 sound/soc/sof/intel/shim.h       |  4 ++++
 3 files changed, 17 insertions(+), 6 deletions(-)

Comments

Mark Brown Sept. 28, 2021, 3:10 p.m. UTC | #1
On Tue, Sep 28, 2021 at 11:22:48AM +0300, Peter Ujfalusi wrote:
> From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
> 
> The work-around enabled in hda-stream.c is only required on earlier
> versions of SOCs/PCH (Skylake, KabyLake, ApolloLake,
> GeminiLake). Before setting the format on the host DMA, it is required
> to couple the host and link DMA - which as a consequence shall use the
> same format.

This breaks the build for me:

/mnt/kernel/sound/soc/sof/intel/hda-stream.c: In function 'hda_dsp_stream_hw_params':
/mnt/kernel/sound/soc/sof/intel/hda-stream.c:436:42: error: implicit declaration of function 'get_chip_info'; did you mean 'get_group_info'? [-Werror=implicit-function-declaration]
Pierre-Louis Bossart Sept. 30, 2021, 8:24 p.m. UTC | #2
On 9/28/21 10:10 AM, Mark Brown wrote:
> On Tue, Sep 28, 2021 at 11:22:48AM +0300, Peter Ujfalusi wrote:
>> From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
>>
>> The work-around enabled in hda-stream.c is only required on earlier
>> versions of SOCs/PCH (Skylake, KabyLake, ApolloLake,
>> GeminiLake). Before setting the format on the host DMA, it is required
>> to couple the host and link DMA - which as a consequence shall use the
>> same format.
> 
> This breaks the build for me:
> 
> /mnt/kernel/sound/soc/sof/intel/hda-stream.c: In function 'hda_dsp_stream_hw_params':
> /mnt/kernel/sound/soc/sof/intel/hda-stream.c:436:42: error: implicit declaration of function 'get_chip_info'; did you mean 'get_group_info'? [-Werror=implicit-function-declaration]

Ack, we're missing a dependency.

Peter, this function was moved to shim.h with Ranjani's patch
"ASoC: SOF: Intel: hda: expose get_chip_info()"

That patch was added in the SOF multi-core series.
Peter Ujfalusi Oct. 1, 2021, 5:58 a.m. UTC | #3
Hi Mark, Pierre,

On 30/09/2021 23:24, Pierre-Louis Bossart wrote:
> 
> 
> On 9/28/21 10:10 AM, Mark Brown wrote:
>> On Tue, Sep 28, 2021 at 11:22:48AM +0300, Peter Ujfalusi wrote:
>>> From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
>>>
>>> The work-around enabled in hda-stream.c is only required on earlier
>>> versions of SOCs/PCH (Skylake, KabyLake, ApolloLake,
>>> GeminiLake). Before setting the format on the host DMA, it is required
>>> to couple the host and link DMA - which as a consequence shall use the
>>> same format.
>>
>> This breaks the build for me:
>>
>> /mnt/kernel/sound/soc/sof/intel/hda-stream.c: In function 'hda_dsp_stream_hw_params':
>> /mnt/kernel/sound/soc/sof/intel/hda-stream.c:436:42: error: implicit declaration of function 'get_chip_info'; did you mean 'get_group_info'? [-Werror=implicit-function-declaration]

Sorry about that.

I'm going to script this from now.

It was sort of therapeutic meditation type of flow:

one slip of coffee
find a patch / feature series
git checkout -b to_upstream/<topic> <current_upstream_base>
git cherry-pick <hash from sof-dev-rebase>
if (fail) goto drop_patch;
scripts/checkpatch.pl --strict -g HEAD
if (fail) correct it();
compile (x64/aarch64, sparse for both) - this I have scripted
if (fail) goto drop_patch;
boot test
if (fail) goto drop_patch;
format-patch && send

fail:
drop patch or series and try to find another one.

I must have skipped the compile phase.

> Ack, we're missing a dependency.
> 
> Peter, this function was moved to shim.h with Ranjani's patch
> "ASoC: SOF: Intel: hda: expose get_chip_info()"
>
> That patch was added in the SOF multi-core series.

Yes, it is and it does not apply without the dynamic pipelines and
possibly have dependency on other patches from the muticore support for
the dynamic-pipelines.

Sorry for the trouble, I'll start with a coffee then the script.
Mark Brown Oct. 1, 2021, 3:54 p.m. UTC | #4
On Fri, Oct 01, 2021 at 08:58:28AM +0300, Péter Ujfalusi wrote:

> Sorry about that.

> I'm going to script this from now.

No worries.  BTW while you're at scripting this I'd suggest looking at
signing your patches with patatt/b4 attest, it's pretty trivial to
integrate into the flow.
diff mbox series

Patch

diff --git a/sound/soc/sof/intel/apl.c b/sound/soc/sof/intel/apl.c
index e6a1f6532547..16b7d8b1adff 100644
--- a/sound/soc/sof/intel/apl.c
+++ b/sound/soc/sof/intel/apl.c
@@ -143,5 +143,6 @@  const struct sof_intel_dsp_desc apl_chip_info = {
 	.rom_init_timeout	= 150,
 	.ssp_count = APL_SSP_COUNT,
 	.ssp_base_offset = APL_SSP_BASE_OFFSET,
+	.quirks = SOF_INTEL_PROCEN_FMT_QUIRK,
 };
 EXPORT_SYMBOL_NS(apl_chip_info, SND_SOC_SOF_INTEL_HDA_COMMON);
diff --git a/sound/soc/sof/intel/hda-stream.c b/sound/soc/sof/intel/hda-stream.c
index 63c367478f1c..47a465b06da5 100644
--- a/sound/soc/sof/intel/hda-stream.c
+++ b/sound/soc/sof/intel/hda-stream.c
@@ -405,6 +405,7 @@  int hda_dsp_stream_hw_params(struct snd_sof_dev *sdev,
 			     struct snd_dma_buffer *dmab,
 			     struct snd_pcm_hw_params *params)
 {
+	const struct sof_intel_dsp_desc *chip = get_chip_info(sdev->pdata);
 	struct hdac_bus *bus = sof_to_bus(sdev);
 	struct hdac_stream *hstream = &stream->hstream;
 	int sd_offset = SOF_STREAM_SD_OFFSET(hstream);
@@ -538,6 +539,7 @@  int hda_dsp_stream_hw_params(struct snd_sof_dev *sdev,
 
 	/*
 	 * Recommended hardware programming sequence for HDAudio DMA format
+	 * on earlier platforms - this is not needed on newer platforms
 	 *
 	 * 1. Put DMA into coupled mode by clearing PPCTL.PROCEN bit
 	 *    for corresponding stream index before the time of writing
@@ -547,9 +549,11 @@  int hda_dsp_stream_hw_params(struct snd_sof_dev *sdev,
 	 *    enable decoupled mode
 	 */
 
-	/* couple host and link DMA, disable DSP features */
-	snd_sof_dsp_update_bits(sdev, HDA_DSP_PP_BAR, SOF_HDA_REG_PP_PPCTL,
-				mask, 0);
+	if (chip->quirks & SOF_INTEL_PROCEN_FMT_QUIRK) {
+		/* couple host and link DMA, disable DSP features */
+		snd_sof_dsp_update_bits(sdev, HDA_DSP_PP_BAR, SOF_HDA_REG_PP_PPCTL,
+					mask, 0);
+	}
 
 	/* program stream format */
 	snd_sof_dsp_update_bits(sdev, HDA_DSP_HDA_BAR,
@@ -557,9 +561,11 @@  int hda_dsp_stream_hw_params(struct snd_sof_dev *sdev,
 				SOF_HDA_ADSP_REG_CL_SD_FORMAT,
 				0xffff, hstream->format_val);
 
-	/* decouple host and link DMA, enable DSP features */
-	snd_sof_dsp_update_bits(sdev, HDA_DSP_PP_BAR, SOF_HDA_REG_PP_PPCTL,
-				mask, mask);
+	if (chip->quirks & SOF_INTEL_PROCEN_FMT_QUIRK) {
+		/* decouple host and link DMA, enable DSP features */
+		snd_sof_dsp_update_bits(sdev, HDA_DSP_PP_BAR, SOF_HDA_REG_PP_PPCTL,
+					mask, mask);
+	}
 
 	/* program last valid index */
 	snd_sof_dsp_update_bits(sdev, HDA_DSP_HDA_BAR,
diff --git a/sound/soc/sof/intel/shim.h b/sound/soc/sof/intel/shim.h
index e9f7d4d7fcce..8e2a0f4c0f66 100644
--- a/sound/soc/sof/intel/shim.h
+++ b/sound/soc/sof/intel/shim.h
@@ -151,6 +151,9 @@ 
 #define PCI_PMCS		0x84
 #define PCI_PMCS_PS_MASK	0x3
 
+/* Intel quirks */
+#define SOF_INTEL_PROCEN_FMT_QUIRK BIT(0)
+
 /* DSP hardware descriptor */
 struct sof_intel_dsp_desc {
 	int cores_num;
@@ -166,6 +169,7 @@  struct sof_intel_dsp_desc {
 	int ssp_base_offset;		/* base address of the SSPs */
 	u32 sdw_shim_base;
 	u32 sdw_alh_base;
+	u32 quirks;
 	bool (*check_sdw_irq)(struct snd_sof_dev *sdev);
 };