From 3f58521bc81455bdfec2a44febf25ace8988a47f Mon Sep 17 00:00:00 2001 From: Pierre-Louis Bossart Date: Mon, 3 Jun 2019 11:20:28 -0500 Subject: [PATCH] ASoC: SOF: Intel: cnl-ipc: re-enable IPC IRQ at end of handler Align with Skylake driver and enable the IRQ at end of handler, instead of at beginning. Also add an error log if we have nothing to do in this handler. Signed-off-by: Pierre-Louis Bossart Signed-off-by: Mark Brown --- sound/soc/sof/intel/cnl.c | 24 ++++++++++++++++-------- 1 file changed, 16 insertions(+), 8 deletions(-) diff --git a/sound/soc/sof/intel/cnl.c b/sound/soc/sof/intel/cnl.c index 4ecba1d..b794a88 100644 --- a/sound/soc/sof/intel/cnl.c +++ b/sound/soc/sof/intel/cnl.c @@ -37,7 +37,7 @@ static irqreturn_t cnl_ipc_irq_thread(int irq, void *context) u32 hipctdd; u32 msg; u32 msg_ext; - irqreturn_t ret = IRQ_NONE; + bool ipc_irq = false; hipcida = snd_sof_dsp_read(sdev, HDA_DSP_BAR, CNL_DSP_REG_HIPCIDA); hipcctl = snd_sof_dsp_read(sdev, HDA_DSP_BAR, CNL_DSP_REG_HIPCCTL); @@ -45,10 +45,6 @@ static irqreturn_t cnl_ipc_irq_thread(int irq, void *context) hipctdd = snd_sof_dsp_read(sdev, HDA_DSP_BAR, CNL_DSP_REG_HIPCTDD); hipci = snd_sof_dsp_read(sdev, HDA_DSP_BAR, CNL_DSP_REG_HIPCIDR); - /* reenable IPC interrupt */ - snd_sof_dsp_update_bits(sdev, HDA_DSP_BAR, HDA_DSP_REG_ADSPIC, - HDA_DSP_ADSPIC_IPC, HDA_DSP_ADSPIC_IPC); - /* reply message from DSP */ if (hipcida & CNL_DSP_REG_HIPCIDA_DONE && hipcctl & CNL_DSP_REG_HIPCCTL_DONE) { @@ -79,7 +75,7 @@ static irqreturn_t cnl_ipc_irq_thread(int irq, void *context) spin_unlock_irq(&sdev->ipc_lock); - ret = IRQ_HANDLED; + ipc_irq = true; } /* new message from DSP */ @@ -101,10 +97,22 @@ static irqreturn_t cnl_ipc_irq_thread(int irq, void *context) cnl_ipc_host_done(sdev); - ret = IRQ_HANDLED; + ipc_irq = true; + } + + if (!ipc_irq) { + /* + * This interrupt is not shared so no need to return IRQ_NONE. + */ + dev_err_ratelimited(sdev->dev, + "error: nothing to do in IRQ thread\n"); } - return ret; + /* re-enable IPC interrupt */ + snd_sof_dsp_update_bits(sdev, HDA_DSP_BAR, HDA_DSP_REG_ADSPIC, + HDA_DSP_ADSPIC_IPC, HDA_DSP_ADSPIC_IPC); + + return IRQ_HANDLED; } static void cnl_ipc_host_done(struct snd_sof_dev *sdev) -- 2.7.4