From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
To: Vijendar Mukunda <Vijendar.Mukunda@amd.com>, broonie@kernel.org
Cc: alsa-devel@alsa-project.org, Basavaraj.Hiregoudar@amd.com,
Sunil-kumar.Dommati@amd.com, Mastan.Katragadda@amd.com,
Arungopal.kondaveeti@amd.com, mario.limonciello@amd.com,
Liam Girdwood <lgirdwood@gmail.com>,
Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.com>,
Syed Saba Kareem <Syed.SabaKareem@amd.com>,
open list <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH V2 5/9] ASoC: amd: ps: add support for SoundWire DMA interrupts
Date: Mon, 22 May 2023 13:12:06 -0500 [thread overview]
Message-ID: <fea3c862-1470-7911-ff77-5d945b1d77cf@linux.intel.com> (raw)
In-Reply-To: <20230522133122.166841-6-Vijendar.Mukunda@amd.com>
On 5/22/23 08:31, Vijendar Mukunda wrote:
> Initialize workqueue for SoundWire DMA interrupts handling.
> Whenever audio data equal to the SoundWire FIFO watermark level
> are produced/consumed, interrupt is generated.
> Acknowledge the interrupt and schedule the workqueue.
It would help to explain why a work queue is needed is the first place,
as opposed to handling periods in the interrupt thread.
> +static void acp63_sdw_dma_workthread(struct work_struct *work)
> +{
> + struct acp63_dev_data *adata = container_of(work, struct acp63_dev_data,
> + acp_sdw_dma_work);
> + struct sdw_dma_dev_data *sdw_dma_data;
> + u32 stream_index;
> + u16 pdev_index;
> +
> + pdev_index = adata->sdw_dma_dev_index;
> + sdw_dma_data = dev_get_drvdata(&adata->pdev[pdev_index]->dev);
> +
> + for (stream_index = 0; stream_index < ACP63_SDW0_DMA_MAX_STREAMS; stream_index++) {
> + if (adata->sdw0_dma_intr_stat[stream_index]) {
> + if (sdw_dma_data->sdw0_dma_stream[stream_index])
> + snd_pcm_period_elapsed(sdw_dma_data->sdw0_dma_stream[stream_index]);
> + adata->sdw0_dma_intr_stat[stream_index] = 0;
> + }
> + }
> + for (stream_index = 0; stream_index < ACP63_SDW1_DMA_MAX_STREAMS; stream_index++) {
> + if (adata->sdw1_dma_intr_stat[stream_index]) {
> + if (sdw_dma_data->sdw1_dma_stream[stream_index])
> + snd_pcm_period_elapsed(sdw_dma_data->sdw1_dma_stream[stream_index]);
> + adata->sdw1_dma_intr_stat[stream_index] = 0;
> + }
> + }
I am not clear on the benefits of the workqueue which only tests a flag
that's set ...
> +}
> +
> static irqreturn_t acp63_irq_handler(int irq, void *dev_id)
> {
> struct acp63_dev_data *adata;
> struct pdm_dev_data *ps_pdm_data;
> struct amd_sdw_manager *amd_manager;
> u32 ext_intr_stat, ext_intr_stat1;
> + u32 stream_id = 0;
> u16 irq_flag = 0;
> + u16 sdw_dma_irq_flag = 0;
> u16 pdev_index;
> + u16 index;
>
> adata = dev_id;
> if (!adata)
> @@ -148,7 +178,57 @@ static irqreturn_t acp63_irq_handler(int irq, void *dev_id)
> snd_pcm_period_elapsed(ps_pdm_data->capture_stream);
> irq_flag = 1;
> }
> - if (irq_flag)
> + if (ext_intr_stat & ACP_SDW_DMA_IRQ_MASK) {
> + for (index = ACP_AUDIO2_RX_THRESHOLD; index <= ACP_AUDIO0_TX_THRESHOLD; index++) {
> + if (ext_intr_stat & BIT(index)) {
> + writel(BIT(index), adata->acp63_base + ACP_EXTERNAL_INTR_STAT);
> + switch (index) {
> + case ACP_AUDIO0_TX_THRESHOLD:
> + stream_id = ACP_SDW0_AUDIO0_TX;
> + break;
> + case ACP_AUDIO1_TX_THRESHOLD:
> + stream_id = ACP_SDW0_AUDIO1_TX;
> + break;
> + case ACP_AUDIO2_TX_THRESHOLD:
> + stream_id = ACP_SDW0_AUDIO2_TX;
> + break;
> + case ACP_AUDIO0_RX_THRESHOLD:
> + stream_id = ACP_SDW0_AUDIO0_RX;
> + break;
> + case ACP_AUDIO1_RX_THRESHOLD:
> + stream_id = ACP_SDW0_AUDIO1_RX;
> + break;
> + case ACP_AUDIO2_RX_THRESHOLD:
> + stream_id = ACP_SDW0_AUDIO2_RX;
> + break;
> + }
> +
> + adata->sdw0_dma_intr_stat[stream_id] = 1;
.. here ...
> + sdw_dma_irq_flag = 1;
> + }
> + }
> + }
> +
> + /* SDW1 BT RX */
> + if (ext_intr_stat1 & ACP_P1_AUDIO1_RX_THRESHOLD) {
> + writel(ACP_P1_AUDIO1_RX_THRESHOLD,
> + adata->acp63_base + ACP_EXTERNAL_INTR_STAT1);
> + adata->sdw1_dma_intr_stat[ACP_SDW1_AUDIO1_RX] = 1;
... and here ...
> + sdw_dma_irq_flag = 1;
> + }
> +
> + /* SDW1 BT TX*/
> + if (ext_intr_stat1 & ACP_P1_AUDIO1_TX_THRESHOLD) {
> + writel(ACP_P1_AUDIO1_TX_THRESHOLD,
> + adata->acp63_base + ACP_EXTERNAL_INTR_STAT1);
> + adata->sdw1_dma_intr_stat[ACP_SDW1_AUDIO1_TX] = 1;
... or here ...
> + sdw_dma_irq_flag = 1;
> + }
> +
> + if (sdw_dma_irq_flag)
> + schedule_work(&adata->acp_sdw_dma_work);
> +
> + if (irq_flag || sdw_dma_irq_flag)
> return IRQ_HANDLED;
> else
> return IRQ_NONE;
next prev parent reply other threads:[~2023-05-22 18:32 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20230522133122.166841-1-Vijendar.Mukunda@amd.com>
2023-05-22 13:31 ` [PATCH V2 1/9] ASoC: amd: ps: create platform devices based on acp config Vijendar Mukunda
2023-05-22 16:16 ` Pierre-Louis Bossart
2023-05-23 6:25 ` Mukunda,Vijendar
2023-05-23 14:29 ` Pierre-Louis Bossart
2023-05-24 7:02 ` Mukunda,Vijendar
2023-05-22 13:31 ` [PATCH V2 2/9] ASoC: amd: ps: handle SoundWire interrupts in acp pci driver Vijendar Mukunda
2023-05-22 16:26 ` Pierre-Louis Bossart
2023-05-23 6:49 ` Mukunda,Vijendar
2023-05-23 14:34 ` Pierre-Louis Bossart
2023-05-24 7:01 ` Mukunda,Vijendar
2023-05-22 13:31 ` [PATCH V2 3/9] ASoC: amd: ps: add SoundWire dma driver Vijendar Mukunda
2023-05-22 16:34 ` Pierre-Louis Bossart
2023-05-23 7:11 ` Mukunda,Vijendar
2023-05-23 14:48 ` Pierre-Louis Bossart
2023-05-24 11:37 ` Mukunda,Vijendar
2023-05-25 11:43 ` Mukunda,Vijendar
2023-05-22 13:31 ` [PATCH V2 4/9] ASoC: amd: ps: add SoundWire dma driver dma ops Vijendar Mukunda
2023-05-22 16:39 ` Pierre-Louis Bossart
2023-05-23 5:41 ` Mukunda,Vijendar
2023-05-22 13:31 ` [PATCH V2 5/9] ASoC: amd: ps: add support for SoundWire DMA interrupts Vijendar Mukunda
2023-05-22 18:12 ` Pierre-Louis Bossart [this message]
2023-05-23 7:36 ` Mukunda,Vijendar
2023-05-23 15:00 ` Pierre-Louis Bossart
2023-05-24 7:45 ` Mukunda,Vijendar
2023-05-31 7:28 ` Mukunda,Vijendar
2023-05-31 13:53 ` Pierre-Louis Bossart
2023-06-05 11:24 ` Mukunda,Vijendar
2023-05-22 13:31 ` [PATCH V2 6/9] ASoC: amd: ps: add pm ops support for SoundWire dma driver Vijendar Mukunda
2023-05-22 18:20 ` Pierre-Louis Bossart
2023-05-23 10:53 ` Mukunda,Vijendar
2023-05-23 15:03 ` Pierre-Louis Bossart
2023-05-22 13:31 ` [PATCH V2 7/9] ASoC: amd: ps: enable SoundWire dma driver build Vijendar Mukunda
2023-05-22 13:31 ` [PATCH V2 8/9] ASoC: amd: update comments in Kconfig file Vijendar Mukunda
2023-05-22 13:31 ` [PATCH V2 9/9] ASoC: amd: ps: Add SoundWire specific checks in pci driver in pm ops Vijendar Mukunda
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