From: Keyon Jie yang.jie@linux.intel.com
If the firmware declares the IMR restore feature, we only need to do a simple powering up to resume from D3, no firmware re-downloading needed - the context is saved/restored to/from IMR without needing driver support.
Add a hda_dsp_boot_imr() helper for this simple DSP reboot, and use it when it is available.
Reviewed-by: Ranjani Sridharan ranjani.sridharan@linux.intel.com Reviewed-by: Péter Ujfalusi peter.ujfalusi@linux.intel.com Signed-off-by: Keyon Jie yang.jie@linux.intel.com Signed-off-by: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com --- sound/soc/sof/intel/hda-loader.c | 38 ++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+)
diff --git a/sound/soc/sof/intel/hda-loader.c b/sound/soc/sof/intel/hda-loader.c index 7f1b1d0f2422..baf2ff146f50 100644 --- a/sound/soc/sof/intel/hda-loader.c +++ b/sound/soc/sof/intel/hda-loader.c @@ -353,6 +353,38 @@ int hda_dsp_cl_boot_firmware_iccmax(struct snd_sof_dev *sdev) return ret; }
+static int hda_dsp_boot_imr(struct snd_sof_dev *sdev) +{ + struct sof_intel_hda_dev *hda = sdev->pdata->hw_pdata; + const struct sof_intel_dsp_desc *chip = hda->desc; + unsigned long mask; + u32 j; + int ret; + + /* power up & unstall/run the cores to run the firmware */ + ret = hda_dsp_enable_core(sdev, chip->init_core_mask); + if (ret < 0) { + dev_err(sdev->dev, "dsp core start failed %d\n", ret); + return -EIO; + } + + /* set enabled cores mask and increment ref count for cores in init_core_mask */ + sdev->enabled_cores_mask |= chip->init_core_mask; + mask = sdev->enabled_cores_mask; + for_each_set_bit(j, &mask, SOF_MAX_DSP_NUM_CORES) + sdev->dsp_core_ref_count[j]++; + + hda_ssp_set_cbp_cfp(sdev); + + /* enable IPC interrupts */ + hda_dsp_ipc_int_enable(sdev); + + /* process wakes */ + hda_sdw_process_wakeen(sdev); + + return ret; +} + int hda_dsp_cl_boot_firmware(struct snd_sof_dev *sdev) { struct sof_intel_hda_dev *hda = sdev->pdata->hw_pdata; @@ -363,6 +395,12 @@ int hda_dsp_cl_boot_firmware(struct snd_sof_dev *sdev) struct firmware stripped_firmware; int ret, ret1, i;
+ if ((sdev->fw_ready.flags & SOF_IPC_INFO_D3_PERSISTENT) && + !sdev->first_boot) { + dev_dbg(sdev->dev, "IMR restore supported, booting from IMR directly\n"); + return hda_dsp_boot_imr(sdev); + } + chip_info = desc->chip_info;
if (plat_data->fw->size <= plat_data->fw_offset) {