From 5dbeb8287421984a09c92a79c503f8bd41cf3fe7 Mon Sep 17 00:00:00 2001 From: Pierre-Louis Bossart Date: Mon, 3 Jun 2019 11:20:29 -0500 Subject: [PATCH] ASoC: SOF: Intel: hda-ipc: read all IPC registers first Align with hardware recommended sequences, and read all IPC registers before doing any other actions. Playing with BUSY and DONE bits may invalidate values. The values read may not actually be necessary but at least this provides a snapshot of the IPC registers with no consistency issues. Signed-off-by: Pierre-Louis Bossart Signed-off-by: Mark Brown --- sound/soc/sof/intel/hda-ipc.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) diff --git a/sound/soc/sof/intel/hda-ipc.c b/sound/soc/sof/intel/hda-ipc.c index 728dd1e075a4..1f01897fa6e3 100644 --- a/sound/soc/sof/intel/hda-ipc.c +++ b/sound/soc/sof/intel/hda-ipc.c @@ -145,6 +145,8 @@ irqreturn_t hda_dsp_ipc_irq_thread(int irq, void *context) HDA_DSP_REG_HIPCIE); hipct = snd_sof_dsp_read(sdev, HDA_DSP_BAR, HDA_DSP_REG_HIPCT); hipcctl = snd_sof_dsp_read(sdev, HDA_DSP_BAR, HDA_DSP_REG_HIPCCTL); + hipci = snd_sof_dsp_read(sdev, HDA_DSP_BAR, HDA_DSP_REG_HIPCI); + hipcte = snd_sof_dsp_read(sdev, HDA_DSP_BAR, HDA_DSP_REG_HIPCTE); /* reenable IPC interrupt */ snd_sof_dsp_update_bits(sdev, HDA_DSP_BAR, HDA_DSP_REG_ADSPIC, @@ -153,8 +155,6 @@ irqreturn_t hda_dsp_ipc_irq_thread(int irq, void *context) /* is this a reply message from the DSP */ if (hipcie & HDA_DSP_REG_HIPCIE_DONE && hipcctl & HDA_DSP_REG_HIPCCTL_DONE) { - hipci = snd_sof_dsp_read(sdev, HDA_DSP_BAR, - HDA_DSP_REG_HIPCI); msg = hipci & HDA_DSP_REG_HIPCI_MSG_MASK; msg_ext = hipcie & HDA_DSP_REG_HIPCIE_MSG_MASK; @@ -202,9 +202,6 @@ irqreturn_t hda_dsp_ipc_irq_thread(int irq, void *context) /* is this a new message from DSP */ if (hipct & HDA_DSP_REG_HIPCT_BUSY && hipcctl & HDA_DSP_REG_HIPCCTL_BUSY) { - - hipcte = snd_sof_dsp_read(sdev, HDA_DSP_BAR, - HDA_DSP_REG_HIPCTE); msg = hipct & HDA_DSP_REG_HIPCT_MSG_MASK; msg_ext = hipcte & HDA_DSP_REG_HIPCTE_MSG_MASK; -- 2.30.2