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[165.204.84.11]) by smtp.gmail.com with ESMTPSA id c26sm9148691qkm.98.2020.05.11.14.20.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 11 May 2020 14:20:30 -0700 (PDT) From: Alex Deucher X-Google-Original-From: Alex Deucher To: alsa-devel@alsa-project.org, broonie@kernel.org, vijendar.mukunda@amd.com, tiwai@suse.de Subject: [PATCH v2 06/14] ASoC: amd: irq handler changes for ACP3x PDM dma driver Date: Mon, 11 May 2020 17:20:06 -0400 Message-Id: <20200511212014.2359225-7-alexander.deucher@amd.com> X-Mailer: git-send-email 2.25.4 In-Reply-To: <20200511212014.2359225-1-alexander.deucher@amd.com> References: <20200511212014.2359225-1-alexander.deucher@amd.com> MIME-Version: 1.0 Cc: Alex Deucher , Vijendar Mukunda X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" From: Vijendar Mukunda Whenever audio data equal to the PDM watermark level are consumed, interrupt is generated. Acknowledge the interrupt. Signed-off-by: Vijendar Mukunda Signed-off-by: Alex Deucher --- sound/soc/amd/renoir/acp3x-pdm-dma.c | 38 ++++++++++++++++++++++++++++ sound/soc/amd/renoir/rn_acp3x.h | 2 ++ 2 files changed, 40 insertions(+) diff --git a/sound/soc/amd/renoir/acp3x-pdm-dma.c b/sound/soc/amd/renoir/acp3x-pdm-dma.c index 1dda8cf2edd2..fdac2c1e3acd 100644 --- a/sound/soc/amd/renoir/acp3x-pdm-dma.c +++ b/sound/soc/amd/renoir/acp3x-pdm-dma.c @@ -16,6 +16,31 @@ #define DRV_NAME "acp_rn_pdm_dma" +static irqreturn_t pdm_irq_handler(int irq, void *dev_id) +{ + struct pdm_dev_data *rn_pdm_data; + u16 cap_flag; + u32 val; + + rn_pdm_data = dev_id; + if (!rn_pdm_data) + return IRQ_NONE; + + cap_flag = 0; + val = rn_readl(rn_pdm_data->acp_base + ACP_EXTERNAL_INTR_STAT); + if ((val & BIT(PDM_DMA_STAT)) && rn_pdm_data->capture_stream) { + rn_writel(BIT(PDM_DMA_STAT), rn_pdm_data->acp_base + + ACP_EXTERNAL_INTR_STAT); + snd_pcm_period_elapsed(rn_pdm_data->capture_stream); + cap_flag = 1; + } + + if (cap_flag) + return IRQ_HANDLED; + else + return IRQ_NONE; +} + static struct snd_soc_dai_driver acp_pdm_dai_driver = { .capture = { .rates = SNDRV_PCM_RATE_48000, @@ -60,6 +85,13 @@ static int acp_pdm_audio_probe(struct platform_device *pdev) if (!adata->acp_base) return -ENOMEM; + res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); + if (!res) { + dev_err(&pdev->dev, "IORESOURCE_IRQ FAILED\n"); + return -ENODEV; + } + + adata->pdm_irq = res->start; adata->capture_stream = NULL; dev_set_drvdata(&pdev->dev, adata); @@ -71,6 +103,12 @@ static int acp_pdm_audio_probe(struct platform_device *pdev) return -ENODEV; } + status = devm_request_irq(&pdev->dev, adata->pdm_irq, pdm_irq_handler, + irqflags, "ACP_PDM_IRQ", adata); + if (status) { + dev_err(&pdev->dev, "ACP PDM IRQ request failed\n"); + return -ENODEV; + } return 0; } diff --git a/sound/soc/amd/renoir/rn_acp3x.h b/sound/soc/amd/renoir/rn_acp3x.h index 0b450882c6c4..1ad8a7845fda 100644 --- a/sound/soc/amd/renoir/rn_acp3x.h +++ b/sound/soc/amd/renoir/rn_acp3x.h @@ -28,8 +28,10 @@ #define ACP_ERROR_MASK 0x20000000 #define ACP_EXT_INTR_STAT_CLEAR_MASK 0xFFFFFFFF +#define PDM_DMA_STAT 0x10 struct pdm_dev_data { + u32 pdm_irq; void __iomem *acp_base; struct snd_pcm_substream *capture_stream; };