ASoC: SOF: Intel: hda: Define FW boot sequence with ICCMAX

Define the FW boot sequence for platforms that are recommended
to use ICCMAX. This function uses the existing prepare and cleanup
functions for creating a specially crafted capture stream before
powering up the DSP cores.

Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Link: https://lore.kernel.org/r/20200826184532.1612070-7-ranjani.sridharan@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/sof/intel/hda-loader.c b/sound/soc/sof/intel/hda-loader.c
index 9b4844a..5464f89 100644 (file)
--- a/sound/soc/sof/intel/hda-loader.c
+++ b/sound/soc/sof/intel/hda-loader.c
@@ -17,6 +17,7 @@
 
 #include <linux/firmware.h>
 #include <sound/hdaudio_ext.h>
+#include <sound/hda_register.h>
 #include <sound/sof.h>
 #include "../ops.h"
 #include "hda.h"
@@ -33,11 +34,6 @@ static int cl_stream_prepare(struct snd_sof_dev *sdev, unsigned int format,
        struct pci_dev *pci = to_pci_dev(sdev->dev);
        int ret;
 
-       if (direction != SNDRV_PCM_STREAM_PLAYBACK) {
-               dev_err(sdev->dev, "error: code loading DMA is playback only\n");
-               return -EINVAL;
-       }
-
        dsp_stream = hda_dsp_stream_get(sdev, direction);
 
        if (!dsp_stream) {
@@ -58,14 +54,21 @@ static int cl_stream_prepare(struct snd_sof_dev *sdev, unsigned int format,
        hstream->format_val = format;
        hstream->bufsize = size;
 
-       ret = hda_dsp_stream_hw_params(sdev, dsp_stream, dmab, NULL);
-       if (ret < 0) {
-               dev_err(sdev->dev, "error: hdac prepare failed: %x\n", ret);
-               goto error;
+       if (direction == SNDRV_PCM_STREAM_CAPTURE) {
+               ret = hda_dsp_iccmax_stream_hw_params(sdev, dsp_stream, dmab, NULL);
+               if (ret < 0) {
+                       dev_err(sdev->dev, "error: iccmax stream prepare failed: %x\n", ret);
+                       goto error;
+               }
+       } else {
+               ret = hda_dsp_stream_hw_params(sdev, dsp_stream, dmab, NULL);
+               if (ret < 0) {
+                       dev_err(sdev->dev, "error: hdac prepare failed: %x\n", ret);
+                       goto error;
+               }
+               hda_dsp_stream_spib_config(sdev, dsp_stream, HDA_DSP_SPIB_ENABLE, size);
        }
 
-       hda_dsp_stream_spib_config(sdev, dsp_stream, HDA_DSP_SPIB_ENABLE, size);
-
        return hstream->stream_tag;
 
 error:
@@ -224,12 +227,15 @@ static int cl_cleanup(struct snd_sof_dev *sdev, struct snd_dma_buffer *dmab,
 {
        struct hdac_stream *hstream = &stream->hstream;
        int sd_offset = SOF_STREAM_SD_OFFSET(hstream);
-       int ret;
+       int ret = 0;
 
-       ret = hda_dsp_stream_spib_config(sdev, stream, HDA_DSP_SPIB_DISABLE, 0);
+       if (hstream->direction == SNDRV_PCM_STREAM_PLAYBACK)
+               ret = hda_dsp_stream_spib_config(sdev, stream, HDA_DSP_SPIB_DISABLE, 0);
+       else
+               snd_sof_dsp_update_bits(sdev, HDA_DSP_HDA_BAR, sd_offset,
+                                       SOF_HDA_SD_CTL_DMA_START, 0);
 
-       hda_dsp_stream_put(sdev, SNDRV_PCM_STREAM_PLAYBACK,
-                          hstream->stream_tag);
+       hda_dsp_stream_put(sdev, hstream->direction, hstream->stream_tag);
        hstream->running = 0;
        hstream->substream = NULL;
 
@@ -287,6 +293,62 @@ static int cl_copy_fw(struct snd_sof_dev *sdev, struct hdac_ext_stream *stream)
        return status;
 }
 
+int hda_dsp_cl_boot_firmware_iccmax(struct snd_sof_dev *sdev)
+{
+       struct snd_sof_pdata *plat_data = sdev->pdata;
+       struct hdac_ext_stream *iccmax_stream;
+       struct hdac_bus *bus = sof_to_bus(sdev);
+       struct firmware stripped_firmware;
+       int ret, ret1;
+       int iccmax_tag;
+       u8 original_gb;
+
+       /* save the original LTRP guardband value */
+       original_gb = snd_hdac_chip_readb(bus, VS_LTRP) & HDA_VS_INTEL_LTRP_GB_MASK;
+
+       if (plat_data->fw->size <= plat_data->fw_offset) {
+               dev_err(sdev->dev, "error: firmware size must be greater than firmware offset\n");
+               return -EINVAL;
+       }
+
+       stripped_firmware.size = plat_data->fw->size - plat_data->fw_offset;
+
+       /* prepare capture stream for ICCMAX */
+       iccmax_tag = cl_stream_prepare(sdev, HDA_CL_STREAM_FORMAT, stripped_firmware.size,
+                                      &sdev->dmab_bdl, SNDRV_PCM_STREAM_CAPTURE);
+       if (iccmax_tag < 0) {
+               dev_err(sdev->dev, "error: dma prepare for ICCMAX %x\n", iccmax_tag);
+               return iccmax_tag;
+       }
+
+       /* get stream with tag */
+       iccmax_stream = get_stream_with_tag(sdev, iccmax_tag, SNDRV_PCM_STREAM_CAPTURE);
+       if (!iccmax_stream) {
+               dev_err(sdev->dev, "error: could not get stream with stream tag %d\n", iccmax_tag);
+               ret = -ENODEV;
+       } else {
+               ret = hda_dsp_cl_boot_firmware(sdev);
+       }
+
+       /*
+        * Perform iccmax stream cleanup. This should be done even if firmware loading fails.
+        * If the cleanup also fails, we return the initial error
+        */
+       ret1 = cl_cleanup(sdev, &sdev->dmab_bdl, iccmax_stream);
+       if (ret1 < 0) {
+               dev_err(sdev->dev, "error: ICCMAX stream cleanup failed\n");
+
+               /* set return value to indicate cleanup failure */
+               if (!ret)
+                       ret = ret1;
+       }
+
+       /* restore the original guardband value after FW boot */
+       snd_hdac_chip_updateb(bus, VS_LTRP, HDA_VS_INTEL_LTRP_GB_MASK, original_gb);
+
+       return ret;
+}
+
 int hda_dsp_cl_boot_firmware(struct snd_sof_dev *sdev)
 {
        struct snd_sof_pdata *plat_data = sdev->pdata;

diff --git a/sound/soc/sof/intel/hda.h b/sound/soc/sof/intel/hda.h
index 100eaae..a2e6050 100644 (file)
--- a/sound/soc/sof/intel/hda.h
+++ b/sound/soc/sof/intel/hda.h
@@ -612,6 +612,7 @@ int hda_dsp_ipc_cmd_done(struct snd_sof_dev *sdev, int dir);
  * DSP Code loader.
  */
 int hda_dsp_cl_boot_firmware(struct snd_sof_dev *sdev);
+int hda_dsp_cl_boot_firmware_iccmax(struct snd_sof_dev *sdev);
 int hda_dsp_cl_boot_firmware_skl(struct snd_sof_dev *sdev);
 
 /* pre and post fw run ops */