blob: 27664895225f2a1fc61ed2f76a683e8cbc47db61 [file] [log] [blame]
From 3ce920f730d19c733eeba1f805afe597d6c3a8d6 Mon Sep 17 00:00:00 2001
From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Date: Thu, 16 Nov 2017 04:36:51 +0000
Subject: [PATCH 0152/1795] ASoC: rcar: revert IOMMU support so far
commit 4821d914fe74 ("ASoC: rsnd: use dma_sync_single_for_xxx() for
IOMMU") had supported IOMMU, but it breaks normal sound "recorde"
and both PulseAudio's "playback/recorde". The sound will be noisy.
That commit was using dma_sync_single_for_xxx(), and driver should
make sure memory is protected during CPU or Device are using it.
But if driver returns current "residue" data size correctly on pointer
function, player/recorder will access to protected memory.
IOMMU feature should be supported, but I don't know how to handle it
without memory cache problem at this point.
Thus, this patch simply revert it to avoid current noisy sound.
Tested-by: Hiroyuki Yokoyama <hiroyuki.yokoyama.vx@renesas.com>
Tested-by: Ryo Kodama <ryo.kodama.vz@renesas.com>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
(cherry picked from commit c20c6704bf2dafaba0d90c8310ef9e919fe4d2e2)
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
---
sound/soc/sh/rcar/core.c | 4 +-
sound/soc/sh/rcar/dma.c | 86 +++-------------------------------------
2 files changed, 8 insertions(+), 82 deletions(-)
diff --git a/sound/soc/sh/rcar/core.c b/sound/soc/sh/rcar/core.c
index c70eb2097816..f12a88a21dfa 100644
--- a/sound/soc/sh/rcar/core.c
+++ b/sound/soc/sh/rcar/core.c
@@ -1332,8 +1332,8 @@ static int rsnd_pcm_new(struct snd_soc_pcm_runtime *rtd)
return snd_pcm_lib_preallocate_pages_for_all(
rtd->pcm,
- SNDRV_DMA_TYPE_CONTINUOUS,
- snd_dma_continuous_data(GFP_KERNEL),
+ SNDRV_DMA_TYPE_DEV,
+ rtd->card->snd_card->dev,
PREALLOC_BUFFER, PREALLOC_BUFFER_MAX);
}
diff --git a/sound/soc/sh/rcar/dma.c b/sound/soc/sh/rcar/dma.c
index fd557abfe390..4d750bdf8e24 100644
--- a/sound/soc/sh/rcar/dma.c
+++ b/sound/soc/sh/rcar/dma.c
@@ -26,10 +26,7 @@
struct rsnd_dmaen {
struct dma_chan *chan;
dma_cookie_t cookie;
- dma_addr_t dma_buf;
unsigned int dma_len;
- unsigned int dma_period;
- unsigned int dma_cnt;
};
struct rsnd_dmapp {
@@ -71,38 +68,10 @@ static struct rsnd_mod mem = {
/*
* Audio DMAC
*/
-#define rsnd_dmaen_sync(dmaen, io, i) __rsnd_dmaen_sync(dmaen, io, i, 1)
-#define rsnd_dmaen_unsync(dmaen, io, i) __rsnd_dmaen_sync(dmaen, io, i, 0)
-static void __rsnd_dmaen_sync(struct rsnd_dmaen *dmaen, struct rsnd_dai_stream *io,
- int i, int sync)
-{
- struct device *dev = dmaen->chan->device->dev;
- enum dma_data_direction dir;
- int is_play = rsnd_io_is_play(io);
- dma_addr_t buf;
- int len, max;
- size_t period;
-
- len = dmaen->dma_len;
- period = dmaen->dma_period;
- max = len / period;
- i = i % max;
- buf = dmaen->dma_buf + (period * i);
-
- dir = is_play ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
-
- if (sync)
- dma_sync_single_for_device(dev, buf, period, dir);
- else
- dma_sync_single_for_cpu(dev, buf, period, dir);
-}
-
static void __rsnd_dmaen_complete(struct rsnd_mod *mod,
struct rsnd_dai_stream *io)
{
struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
- struct rsnd_dma *dma = rsnd_mod_to_dma(mod);
- struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(dma);
bool elapsed = false;
unsigned long flags;
@@ -115,22 +84,9 @@ static void __rsnd_dmaen_complete(struct rsnd_mod *mod,
*/
spin_lock_irqsave(&priv->lock, flags);
- if (rsnd_io_is_working(io)) {
- rsnd_dmaen_unsync(dmaen, io, dmaen->dma_cnt);
-
- /*
- * Next period is already started.
- * Let's sync Next Next period
- * see
- * rsnd_dmaen_start()
- */
- rsnd_dmaen_sync(dmaen, io, dmaen->dma_cnt + 2);
-
+ if (rsnd_io_is_working(io))
elapsed = true;
- dmaen->dma_cnt++;
- }
-
spin_unlock_irqrestore(&priv->lock, flags);
if (elapsed)
@@ -165,14 +121,8 @@ static int rsnd_dmaen_stop(struct rsnd_mod *mod,
struct rsnd_dma *dma = rsnd_mod_to_dma(mod);
struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(dma);
- if (dmaen->chan) {
- int is_play = rsnd_io_is_play(io);
-
+ if (dmaen->chan)
dmaengine_terminate_all(dmaen->chan);
- dma_unmap_single(dmaen->chan->device->dev,
- dmaen->dma_buf, dmaen->dma_len,
- is_play ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
- }
return 0;
}
@@ -237,11 +187,7 @@ static int rsnd_dmaen_start(struct rsnd_mod *mod,
struct device *dev = rsnd_priv_to_dev(priv);
struct dma_async_tx_descriptor *desc;
struct dma_slave_config cfg = {};
- dma_addr_t buf;
- size_t len;
- size_t period;
int is_play = rsnd_io_is_play(io);
- int i;
int ret;
cfg.direction = is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM;
@@ -258,19 +204,10 @@ static int rsnd_dmaen_start(struct rsnd_mod *mod,
if (ret < 0)
return ret;
- len = snd_pcm_lib_buffer_bytes(substream);
- period = snd_pcm_lib_period_bytes(substream);
- buf = dma_map_single(dmaen->chan->device->dev,
- substream->runtime->dma_area,
- len,
- is_play ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
- if (dma_mapping_error(dmaen->chan->device->dev, buf)) {
- dev_err(dev, "dma map failed\n");
- return -EIO;
- }
-
desc = dmaengine_prep_dma_cyclic(dmaen->chan,
- buf, len, period,
+ substream->runtime->dma_addr,
+ snd_pcm_lib_buffer_bytes(substream),
+ snd_pcm_lib_period_bytes(substream),
is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM,
DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
@@ -282,18 +219,7 @@ static int rsnd_dmaen_start(struct rsnd_mod *mod,
desc->callback = rsnd_dmaen_complete;
desc->callback_param = rsnd_mod_get(dma);
- dmaen->dma_buf = buf;
- dmaen->dma_len = len;
- dmaen->dma_period = period;
- dmaen->dma_cnt = 0;
-
- /*
- * synchronize this and next period
- * see
- * __rsnd_dmaen_complete()
- */
- for (i = 0; i < 2; i++)
- rsnd_dmaen_sync(dmaen, io, i);
+ dmaen->dma_len = snd_pcm_lib_buffer_bytes(substream);
dmaen->cookie = dmaengine_submit(desc);
if (dmaen->cookie < 0) {
--
2.19.0