This is a note to let you know that I've just added the patch titled
soundwire: cadence_master: improve PDI allocation
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
soundwire-cadence_master-improve-pdi-allocation.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit cc8e39069cba85edf66c979b496e918f71107fc4
Author: Bard Liao <yung-chuan.liao@xxxxxxxxxxxxxxx>
Date: Mon Sep 16 14:23:48 2019 -0500
soundwire: cadence_master: improve PDI allocation
[ Upstream commit 1b53385e7938d5a093e92044f9c89e4e76106f1b ]
PDI number should match dai->id, there is no need to track if a PDI is
allocated or not.
Signed-off-by: Bard Liao <yung-chuan.liao@xxxxxxxxxxxxxxx>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20190916192348.467-7-pierre-louis.bossart@xxxxxxxxxxxxxxx
Signed-off-by: Vinod Koul <vkoul@xxxxxxxxxx>
Stable-dep-of: 8ee1b439b154 ("soundwire: cadence: fix invalid PDI offset")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/soundwire/cadence_master.c b/drivers/soundwire/cadence_master.c
index 95dcdac008bb0..e589aa99e4292 100644
--- a/drivers/soundwire/cadence_master.c
+++ b/drivers/soundwire/cadence_master.c
@@ -845,7 +845,6 @@ static int cdns_allocate_pdi(struct sdw_cdns *cdns,
for (i = 0; i < num; i++) {
pdi[i].num = i + pdi_offset;
- pdi[i].assigned = false;
}
*stream = pdi;
@@ -1198,21 +1197,20 @@ EXPORT_SYMBOL(cdns_set_sdw_stream);
* @num: Number of PDIs
* @pdi: PDI instances
*
- * Find and return a free PDI for a given PDI array
+ * Find a PDI for a given PDI array. The PDI num and dai_id are
+ * expected to match, return NULL otherwise.
*/
static struct sdw_cdns_pdi *cdns_find_pdi(struct sdw_cdns *cdns,
unsigned int offset,
unsigned int num,
- struct sdw_cdns_pdi *pdi)
+ struct sdw_cdns_pdi *pdi,
+ int dai_id)
{
int i;
- for (i = offset; i < num; i++) {
- if (pdi[i].assigned)
- continue;
- pdi[i].assigned = true;
- return &pdi[i];
- }
+ for (i = offset; i < offset + num; i++)
+ if (pdi[i].num == dai_id)
+ return &pdi[i];
return NULL;
}
@@ -1252,18 +1250,21 @@ EXPORT_SYMBOL(sdw_cdns_config_stream);
*/
struct sdw_cdns_pdi *sdw_cdns_alloc_pdi(struct sdw_cdns *cdns,
struct sdw_cdns_streams *stream,
- u32 ch, u32 dir)
+ u32 ch, u32 dir, int dai_id)
{
struct sdw_cdns_pdi *pdi = NULL;
if (dir == SDW_DATA_DIR_RX)
- pdi = cdns_find_pdi(cdns, 0, stream->num_in, stream->in);
+ pdi = cdns_find_pdi(cdns, 0, stream->num_in, stream->in,
+ dai_id);
else
- pdi = cdns_find_pdi(cdns, 0, stream->num_out, stream->out);
+ pdi = cdns_find_pdi(cdns, 0, stream->num_out, stream->out,
+ dai_id);
/* check if we found a PDI, else find in bi-directional */
if (!pdi)
- pdi = cdns_find_pdi(cdns, 2, stream->num_bd, stream->bd);
+ pdi = cdns_find_pdi(cdns, 2, stream->num_bd, stream->bd,
+ dai_id);
if (pdi) {
pdi->l_ch_num = 0;
diff --git a/drivers/soundwire/cadence_master.h b/drivers/soundwire/cadence_master.h
index 3e963614a216b..6199e71edeab7 100644
--- a/drivers/soundwire/cadence_master.h
+++ b/drivers/soundwire/cadence_master.h
@@ -8,7 +8,6 @@
/**
* struct sdw_cdns_pdi: PDI (Physical Data Interface) instance
*
- * @assigned: pdi assigned
* @num: pdi number
* @intel_alh_id: link identifier
* @l_ch_num: low channel for PDI
@@ -18,7 +17,6 @@
* @type: stream type, PDM or PCM
*/
struct sdw_cdns_pdi {
- bool assigned;
int num;
int intel_alh_id;
int l_ch_num;
@@ -155,7 +153,7 @@ int sdw_cdns_get_stream(struct sdw_cdns *cdns,
u32 ch, u32 dir);
struct sdw_cdns_pdi *sdw_cdns_alloc_pdi(struct sdw_cdns *cdns,
struct sdw_cdns_streams *stream,
- u32 ch, u32 dir);
+ u32 ch, u32 dir, int dai_id);
void sdw_cdns_config_stream(struct sdw_cdns *cdns,
u32 ch, u32 dir, struct sdw_cdns_pdi *pdi);
diff --git a/drivers/soundwire/intel.c b/drivers/soundwire/intel.c
index 9ac45e6dbe9df..7470adfaabf37 100644
--- a/drivers/soundwire/intel.c
+++ b/drivers/soundwire/intel.c
@@ -636,11 +636,10 @@ static int intel_hw_params(struct snd_pcm_substream *substream,
if (dma->stream_type == SDW_STREAM_PDM)
pcm = false;
- /* FIXME: We would need to get PDI info from topology */
if (pcm)
- pdi = sdw_cdns_alloc_pdi(cdns, &cdns->pcm, ch, dir);
+ pdi = sdw_cdns_alloc_pdi(cdns, &cdns->pcm, ch, dir, dai->id);
else
- pdi = sdw_cdns_alloc_pdi(cdns, &cdns->pdm, ch, dir);
+ pdi = sdw_cdns_alloc_pdi(cdns, &cdns->pdm, ch, dir, dai->id);
if (!pdi) {
ret = -EINVAL;
