[linux-yocto] [PATCH 2/7] ALSA: hda - Handle error from get_response bus ops directly
seng.kai.tan at intel.com
seng.kai.tan at intel.com
Wed Jun 15 01:54:50 PDT 2016
From: Takashi Iwai <tiwai at suse.de>
... and drop bus->rirb_error flag. This makes the code simpler.
We treat -EAGAIN from get_response ops as a special meaning: it allows
the caller to retry after bus reset.
Signed-off-by: Takashi Iwai <tiwai at suse.de>
(cherry picked from commit cad372f1be5ef7cf14b980e679fbf30430dc241f)
Signed-off-by: SengKai,Tan <seng.kai.tan at intel.com>
---
sound/pci/hda/hda_codec.c | 17 +++++++--------
sound/pci/hda/hda_codec.h | 3 +--
sound/pci/hda/hda_controller.c | 47 +++++++++++++++++++++---------------------
3 files changed, 32 insertions(+), 35 deletions(-)
diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c
index 52689d3..17499d4 100644
--- a/sound/pci/hda/hda_codec.c
+++ b/sound/pci/hda/hda_codec.c
@@ -146,7 +146,7 @@ static int codec_exec_verb(struct hdac_device *dev, unsigned int cmd,
bus->no_response_fallback = 0;
mutex_unlock(&bus->core.cmd_mutex);
snd_hda_power_down_pm(codec);
- if (!codec_in_pm(codec) && res && err < 0 && bus->rirb_error) {
+ if (!codec_in_pm(codec) && res && err == -EAGAIN) {
if (bus->response_reset) {
codec_dbg(codec,
"resetting BUS due to fatal communication error\n");
@@ -436,9 +436,8 @@ static unsigned int get_num_devices(struct hda_codec *codec, hda_nid_t nid)
get_wcaps_type(wcaps) != AC_WID_PIN)
return 0;
- parm = snd_hda_param_read(codec, nid, AC_PAR_DEVLIST_LEN);
- if (parm == -1 && codec->bus->rirb_error)
- parm = 0;
+ if (_snd_hdac_read_parm(&codec->core, nid, AC_PAR_DEVLIST_LEN, &parm))
+ return 0; /* error */
return parm & AC_DEV_LIST_LEN_MASK;
}
@@ -467,10 +466,9 @@ int snd_hda_get_devices(struct hda_codec *codec, hda_nid_t nid,
devices = 0;
while (devices < dev_len) {
- parm = snd_hda_codec_read(codec, nid, 0,
- AC_VERB_GET_DEVICE_LIST, devices);
- if (parm == -1 && codec->bus->rirb_error)
- break;
+ if (snd_hdac_read(&codec->core, nid,
+ AC_VERB_GET_DEVICE_LIST, devices, &parm))
+ break; /* error */
for (i = 0; i < 8; i++) {
dev_list[devices] = (u8)parm;
@@ -520,8 +518,7 @@ static int _hda_bus_get_response(struct hdac_bus *_bus, unsigned int addr,
unsigned int *res)
{
struct hda_bus *bus = container_of(_bus, struct hda_bus, core);
- *res = bus->ops.get_response(bus, addr);
- return bus->rirb_error ? -EIO : 0;
+ return bus->ops.get_response(bus, addr, res);
}
static const struct hdac_bus_ops bus_ops = {
diff --git a/sound/pci/hda/hda_codec.h b/sound/pci/hda/hda_codec.h
index 9075ac2..fc4f761 100644
--- a/sound/pci/hda/hda_codec.h
+++ b/sound/pci/hda/hda_codec.h
@@ -45,7 +45,7 @@ struct hda_bus_ops {
/* send a single command */
int (*command)(struct hda_bus *bus, unsigned int cmd);
/* get a response from the last command */
- unsigned int (*get_response)(struct hda_bus *bus, unsigned int addr);
+ int (*get_response)(struct hda_bus *bus, unsigned int addr, unsigned int *res);
/* free the private data */
void (*private_free)(struct hda_bus *);
/* attach a PCM stream */
@@ -92,7 +92,6 @@ struct hda_bus {
unsigned int allow_bus_reset:1; /* allow bus reset at fatal error */
/* status for codec/controller */
unsigned int shutdown :1; /* being unloaded */
- unsigned int rirb_error:1; /* error in codec communication */
unsigned int response_reset:1; /* controller was reset */
unsigned int in_reset:1; /* during reset operation */
unsigned int no_response_fallback:1; /* don't fallback at RIRB error */
diff --git a/sound/pci/hda/hda_controller.c b/sound/pci/hda/hda_controller.c
index 26ce990..b4474e2 100644
--- a/sound/pci/hda/hda_controller.c
+++ b/sound/pci/hda/hda_controller.c
@@ -1156,8 +1156,8 @@ static void azx_update_rirb(struct azx *chip)
}
/* receive a response */
-static unsigned int azx_rirb_get_response(struct hda_bus *bus,
- unsigned int addr)
+static int azx_rirb_get_response(struct hda_bus *bus, unsigned int addr,
+ unsigned int *res)
{
struct azx *chip = bus->private_data;
unsigned long timeout;
@@ -1175,11 +1175,12 @@ static unsigned int azx_rirb_get_response(struct hda_bus *bus,
}
if (!chip->rirb.cmds[addr]) {
smp_rmb();
- bus->rirb_error = 0;
if (!do_poll)
chip->poll_count = 0;
- return chip->rirb.res[addr]; /* the last value */
+ if (res)
+ *res = chip->rirb.res[addr]; /* the last value */
+ return 0;
}
if (time_after(jiffies, timeout))
break;
@@ -1192,7 +1193,7 @@ static unsigned int azx_rirb_get_response(struct hda_bus *bus,
}
if (bus->no_response_fallback)
- return -1;
+ return -EIO;
if (!chip->polling_mode && chip->poll_count < 2) {
dev_dbg(chip->card->dev,
@@ -1217,10 +1218,8 @@ static unsigned int azx_rirb_get_response(struct hda_bus *bus,
"No response from codec, disabling MSI: last cmd=0x%08x\n",
chip->last_cmd[addr]);
if (chip->ops->disable_msi_reset_irq(chip) &&
- chip->ops->disable_msi_reset_irq(chip) < 0) {
- bus->rirb_error = 1;
- return -1;
- }
+ chip->ops->disable_msi_reset_irq(chip) < 0)
+ return -EIO;
goto again;
}
@@ -1229,16 +1228,15 @@ static unsigned int azx_rirb_get_response(struct hda_bus *bus,
* phase, this is likely an access to a non-existing codec
* slot. Better to return an error and reset the system.
*/
- return -1;
+ return -EIO;
}
/* a fatal communication error; need either to reset or to fallback
* to the single_cmd mode
*/
- bus->rirb_error = 1;
if (bus->allow_bus_reset && !bus->response_reset && !bus->in_reset) {
bus->response_reset = 1;
- return -1; /* give a chance to retry */
+ return -EAGAIN; /* give a chance to retry */
}
dev_err(chip->card->dev,
@@ -1250,7 +1248,7 @@ static unsigned int azx_rirb_get_response(struct hda_bus *bus,
azx_free_cmd_io(chip);
/* disable unsolicited responses */
azx_writel(chip, GCTL, azx_readl(chip, GCTL) & ~AZX_GCTL_UNSOL);
- return -1;
+ return -EIO;
}
/*
@@ -1291,7 +1289,6 @@ static int azx_single_send_cmd(struct hda_bus *bus, u32 val)
unsigned int addr = azx_command_addr(val);
int timeout = 50;
- bus->rirb_error = 0;
while (timeout--) {
/* check ICB busy bit */
if (!((azx_readw(chip, IRS) & AZX_IRS_BUSY))) {
@@ -1313,11 +1310,14 @@ static int azx_single_send_cmd(struct hda_bus *bus, u32 val)
}
/* receive a response */
-static unsigned int azx_single_get_response(struct hda_bus *bus,
- unsigned int addr)
+static int azx_single_get_response(struct hda_bus *bus, unsigned int addr,
+ unsigned int *res)
{
struct azx *chip = bus->private_data;
- return chip->rirb.res[addr];
+
+ if (res)
+ *res = chip->rirb.res[addr];
+ return 0;
}
/*
@@ -1342,16 +1342,16 @@ static int azx_send_cmd(struct hda_bus *bus, unsigned int val)
}
/* get a response */
-static unsigned int azx_get_response(struct hda_bus *bus,
- unsigned int addr)
+static int azx_get_response(struct hda_bus *bus, unsigned int addr,
+ unsigned int *res)
{
struct azx *chip = bus->private_data;
if (chip->disabled)
return 0;
if (chip->single_cmd)
- return azx_single_get_response(bus, addr);
+ return azx_single_get_response(bus, addr, res);
else
- return azx_rirb_get_response(bus, addr);
+ return azx_rirb_get_response(bus, addr, res);
}
#ifdef CONFIG_SND_HDA_DSP_LOADER
@@ -1762,15 +1762,16 @@ static int probe_codec(struct azx *chip, int addr)
{
unsigned int cmd = (addr << 28) | (AC_NODE_ROOT << 20) |
(AC_VERB_PARAMETERS << 8) | AC_PAR_VENDOR_ID;
+ int err;
unsigned int res;
mutex_lock(&chip->bus->core.cmd_mutex);
chip->probing = 1;
azx_send_cmd(chip->bus, cmd);
- res = azx_get_response(chip->bus, addr);
+ err = azx_get_response(chip->bus, addr, &res);
chip->probing = 0;
mutex_unlock(&chip->bus->core.cmd_mutex);
- if (res == -1)
+ if (err < 0 || res == -1)
return -EIO;
dev_dbg(chip->card->dev, "codec #%d probed OK\n", addr);
return 0;
--
1.9.1
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