[PATCH 05/11] ASoC: SOF: Drop support for mapped control data

[Ranjani Sridharan]

From: Peter Ujfalusi <peter.ujfalusi at linux.intel.com>

Access through mmapped memory is not supported and it is explicitly
disabled with scontrol->readback_offset = 0; when a control is created.

Remove the dead code and the confusion around this feature.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi at linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart at linux.intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen at intel.com>
Signed-off-by: Ranjani Sridharan <ranjani.sridharan at linux.intel.com>
---
 sound/soc/sof/ipc.c       | 22 ----------------------
 sound/soc/sof/sof-audio.c |  3 ---
 sound/soc/sof/sof-audio.h |  1 -
 3 files changed, 26 deletions(-)

diff --git a/sound/soc/sof/ipc.c b/sound/soc/sof/ipc.c
index 166d4906698b..c722ca0b00a6 100644
--- a/sound/soc/sof/ipc.c
+++ b/sound/soc/sof/ipc.c
@@ -823,7 +823,6 @@ int snd_sof_ipc_set_get_comp_data(struct snd_sof_control *scontrol, bool set)
 	enum sof_ipc_ctrl_type ctrl_type;
 	struct snd_sof_widget *swidget;
 	bool widget_found = false;
-	size_t send_bytes;
 	u32 ipc_cmd;
 	int err;
 
@@ -847,27 +846,6 @@ int snd_sof_ipc_set_get_comp_data(struct snd_sof_control *scontrol, bool set)
 	if (!swidget->use_count)
 		return 0;
 
-	/* read or write firmware volume */
-	if (scontrol->readback_offset != 0) {
-		/* write/read value header via mmaped region */
-		send_bytes = sizeof(struct sof_ipc_ctrl_value_chan) *
-		cdata->num_elems;
-		if (set)
-			err = snd_sof_dsp_block_write(sdev, SOF_FW_BLK_TYPE_IRAM,
-						      scontrol->readback_offset,
-						      cdata->chanv, send_bytes);
-
-		else
-			err = snd_sof_dsp_block_read(sdev, SOF_FW_BLK_TYPE_IRAM,
-						     scontrol->readback_offset,
-						     cdata->chanv, send_bytes);
-
-		if (err)
-			dev_err_once(sdev->dev, "error: %s TYPE_IRAM failed\n",
-				     set ? "write to" :  "read from");
-		return err;
-	}
-
 	/*
 	 * Select the IPC cmd and the ctrl_type based on the ctrl_cmd and the
 	 * direction
diff --git a/sound/soc/sof/sof-audio.c b/sound/soc/sof/sof-audio.c
index b2f009a0c5b7..49fdfe06a9a3 100644
--- a/sound/soc/sof/sof-audio.c
+++ b/sound/soc/sof/sof-audio.c
@@ -16,9 +16,6 @@ static int sof_kcontrol_setup(struct snd_sof_dev *sdev, struct snd_sof_control *
 {
 	int ret;
 
-	/* reset readback offset for scontrol */
-	scontrol->readback_offset = 0;
-
 	ret = snd_sof_ipc_set_get_comp_data(scontrol, true);
 	if (ret < 0)
 		dev_err(sdev->dev, "error: failed kcontrol value set for widget: %d\n",
diff --git a/sound/soc/sof/sof-audio.h b/sound/soc/sof/sof-audio.h
index 7f15b3bc8196..4a8cd7f2a0eb 100644
--- a/sound/soc/sof/sof-audio.h
+++ b/sound/soc/sof/sof-audio.h
@@ -247,7 +247,6 @@ struct snd_sof_control {
 	int max_volume_step; /* max volume step for volume_table */
 	int num_channels;
 	unsigned int access;
-	u32 readback_offset; /* offset to mmapped data if used */
 	int info_type;
 	int index; /* pipeline ID */
 	void *priv; /* private data copied from topology */
-- 
2.25.1