* [PATCH 2/3] ASoC: Don't use write sequencer to power up WM8903
2011-02-10 14:44 [PATCH 1/3] ASoC: Convert WM8903 bias management to use snd_soc_update_bits() Mark Brown
@ 2011-02-10 14:44 ` Mark Brown
2011-02-10 14:44 ` [PATCH 3/3] ASoC: Use explicit sequence for WM8903 bias off Mark Brown
2011-02-10 23:05 ` [PATCH 1/3] ASoC: Convert WM8903 bias management to use snd_soc_update_bits() Liam Girdwood
2 siblings, 0 replies; 4+ messages in thread
From: Mark Brown @ 2011-02-10 14:44 UTC (permalink / raw)
To: Liam Girdwood; +Cc: alsa-devel, patches, Mark Brown
The write sequencer sequencer sequence takes longer than is desirable
as it brings up a full playback path which is not required at this
point. Open coding the sequence cuts the startup time by two thirds.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
---
sound/soc/codecs/wm8903.c | 73 +++++++++++++++++++++++++++++++++------------
1 files changed, 54 insertions(+), 19 deletions(-)
diff --git a/sound/soc/codecs/wm8903.c b/sound/soc/codecs/wm8903.c
index 9156086..c7faeea 100644
--- a/sound/soc/codecs/wm8903.c
+++ b/sound/soc/codecs/wm8903.c
@@ -302,15 +302,6 @@ static int wm8903_run_sequence(struct snd_soc_codec *codec, unsigned int start)
return 0;
}
-static void wm8903_sync_reg_cache(struct snd_soc_codec *codec, u16 *cache)
-{
- int i;
-
- /* There really ought to be something better we can do here :/ */
- for (i = 0; i < ARRAY_SIZE(wm8903_reg_defaults); i++)
- cache[i] = codec->hw_read(codec, i);
-}
-
static void wm8903_reset(struct snd_soc_codec *codec)
{
snd_soc_write(codec, WM8903_SW_RESET_AND_ID, 0);
@@ -1147,6 +1138,7 @@ static int wm8903_set_bias_level(struct snd_soc_codec *codec,
switch (level) {
case SND_SOC_BIAS_ON:
break;
+
case SND_SOC_BIAS_PREPARE:
snd_soc_update_bits(codec, WM8903_VMID_CONTROL_0,
WM8903_VMID_RES_MASK,
@@ -1155,16 +1147,59 @@ static int wm8903_set_bias_level(struct snd_soc_codec *codec,
case SND_SOC_BIAS_STANDBY:
if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
- snd_soc_write(codec, WM8903_CLOCK_RATES_2,
- WM8903_CLK_SYS_ENA);
-
- /* Change DC servo dither level in startup sequence */
- snd_soc_write(codec, WM8903_WRITE_SEQUENCER_0, 0x11);
- snd_soc_write(codec, WM8903_WRITE_SEQUENCER_1, 0x1257);
- snd_soc_write(codec, WM8903_WRITE_SEQUENCER_2, 0x2);
-
- wm8903_run_sequence(codec, 0);
- wm8903_sync_reg_cache(codec, codec->reg_cache);
+ snd_soc_update_bits(codec, WM8903_BIAS_CONTROL_0,
+ WM8903_POBCTRL | WM8903_ISEL_MASK |
+ WM8903_STARTUP_BIAS_ENA |
+ WM8903_BIAS_ENA,
+ WM8903_POBCTRL |
+ (2 << WM8903_ISEL_SHIFT) |
+ WM8903_STARTUP_BIAS_ENA);
+
+ snd_soc_update_bits(codec,
+ WM8903_ANALOGUE_SPK_OUTPUT_CONTROL_0,
+ WM8903_SPK_DISCHARGE,
+ WM8903_SPK_DISCHARGE);
+
+ msleep(33);
+
+ snd_soc_update_bits(codec, WM8903_POWER_MANAGEMENT_5,
+ WM8903_SPKL_ENA | WM8903_SPKR_ENA,
+ WM8903_SPKL_ENA | WM8903_SPKR_ENA);
+
+ snd_soc_update_bits(codec,
+ WM8903_ANALOGUE_SPK_OUTPUT_CONTROL_0,
+ WM8903_SPK_DISCHARGE, 0);
+
+ snd_soc_update_bits(codec, WM8903_VMID_CONTROL_0,
+ WM8903_VMID_TIE_ENA |
+ WM8903_BUFIO_ENA |
+ WM8903_VMID_IO_ENA |
+ WM8903_VMID_SOFT_MASK |
+ WM8903_VMID_RES_MASK |
+ WM8903_VMID_BUF_ENA,
+ WM8903_VMID_TIE_ENA |
+ WM8903_BUFIO_ENA |
+ WM8903_VMID_IO_ENA |
+ (2 << WM8903_VMID_SOFT_SHIFT) |
+ WM8903_VMID_RES_250K |
+ WM8903_VMID_BUF_ENA);
+
+ msleep(129);
+
+ snd_soc_update_bits(codec, WM8903_POWER_MANAGEMENT_5,
+ WM8903_SPKL_ENA | WM8903_SPKR_ENA,
+ 0);
+
+ snd_soc_update_bits(codec, WM8903_VMID_CONTROL_0,
+ WM8903_VMID_SOFT_MASK, 0);
+
+ snd_soc_update_bits(codec, WM8903_VMID_CONTROL_0,
+ WM8903_VMID_RES_MASK,
+ WM8903_VMID_RES_50K);
+
+ snd_soc_update_bits(codec, WM8903_BIAS_CONTROL_0,
+ WM8903_BIAS_ENA | WM8903_POBCTRL,
+ WM8903_BIAS_ENA);
/* By default no bypass paths are enabled so
* enable Class W support.
--
1.7.2.3
^ permalink raw reply related [flat|nested] 4+ messages in thread* [PATCH 3/3] ASoC: Use explicit sequence for WM8903 bias off
2011-02-10 14:44 [PATCH 1/3] ASoC: Convert WM8903 bias management to use snd_soc_update_bits() Mark Brown
2011-02-10 14:44 ` [PATCH 2/3] ASoC: Don't use write sequencer to power up WM8903 Mark Brown
@ 2011-02-10 14:44 ` Mark Brown
2011-02-10 23:05 ` [PATCH 1/3] ASoC: Convert WM8903 bias management to use snd_soc_update_bits() Liam Girdwood
2 siblings, 0 replies; 4+ messages in thread
From: Mark Brown @ 2011-02-10 14:44 UTC (permalink / raw)
To: Liam Girdwood; +Cc: alsa-devel, patches, Mark Brown
This makes no real difference compared to the write sequencer sequence
that was previously used but can run without a clock being provided.
Also remove the write sequencer support code as this was the last use
of it.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
---
sound/soc/codecs/wm8903.c | 66 ++++++++++++++------------------------------
1 files changed, 21 insertions(+), 45 deletions(-)
diff --git a/sound/soc/codecs/wm8903.c b/sound/soc/codecs/wm8903.c
index c7faeea..20325b3 100644
--- a/sound/soc/codecs/wm8903.c
+++ b/sound/soc/codecs/wm8903.c
@@ -230,8 +230,6 @@ struct wm8903_priv {
/* Reference count */
int class_w_users;
- struct completion wseq;
-
struct snd_soc_jack *mic_jack;
int mic_det;
int mic_short;
@@ -267,41 +265,6 @@ static int wm8903_volatile_register(struct snd_soc_codec *codec, unsigned int re
}
}
-static int wm8903_run_sequence(struct snd_soc_codec *codec, unsigned int start)
-{
- u16 reg[5];
- struct wm8903_priv *wm8903 = snd_soc_codec_get_drvdata(codec);
-
- BUG_ON(start > 48);
-
- /* Enable the sequencer if it's not already on */
- reg[0] = snd_soc_read(codec, WM8903_WRITE_SEQUENCER_0);
- snd_soc_write(codec, WM8903_WRITE_SEQUENCER_0,
- reg[0] | WM8903_WSEQ_ENA);
-
- dev_dbg(codec->dev, "Starting sequence at %d\n", start);
-
- snd_soc_write(codec, WM8903_WRITE_SEQUENCER_3,
- start | WM8903_WSEQ_START);
-
- /* Wait for it to complete. If we have the interrupt wired up then
- * that will break us out of the poll early.
- */
- do {
- wait_for_completion_timeout(&wm8903->wseq,
- msecs_to_jiffies(10));
-
- reg[4] = snd_soc_read(codec, WM8903_WRITE_SEQUENCER_4);
- } while (reg[4] & WM8903_WSEQ_BUSY);
-
- dev_dbg(codec->dev, "Sequence complete\n");
-
- /* Disable the sequencer again if we enabled it */
- snd_soc_write(codec, WM8903_WRITE_SEQUENCER_0, reg[0]);
-
- return 0;
-}
-
static void wm8903_reset(struct snd_soc_codec *codec)
{
snd_soc_write(codec, WM8903_SW_RESET_AND_ID, 0);
@@ -1218,11 +1181,26 @@ static int wm8903_set_bias_level(struct snd_soc_codec *codec,
break;
case SND_SOC_BIAS_OFF:
- snd_soc_update_bits(codec, WM8903_CLOCK_RATES_2,
- WM8903_CLK_SYS_ENA, WM8903_CLK_SYS_ENA);
- wm8903_run_sequence(codec, 32);
- snd_soc_update_bits(codec, WM8903_CLOCK_RATES_2,
- WM8903_CLK_SYS_ENA, 0);
+ snd_soc_update_bits(codec, WM8903_BIAS_CONTROL_0,
+ WM8903_BIAS_ENA, 0);
+
+ snd_soc_update_bits(codec, WM8903_VMID_CONTROL_0,
+ WM8903_VMID_SOFT_MASK,
+ 2 << WM8903_VMID_SOFT_SHIFT);
+
+ snd_soc_update_bits(codec, WM8903_VMID_CONTROL_0,
+ WM8903_VMID_BUF_ENA, 0);
+
+ msleep(290);
+
+ snd_soc_update_bits(codec, WM8903_VMID_CONTROL_0,
+ WM8903_VMID_TIE_ENA | WM8903_BUFIO_ENA |
+ WM8903_VMID_IO_ENA | WM8903_VMID_RES_MASK |
+ WM8903_VMID_SOFT_MASK |
+ WM8903_VMID_BUF_ENA, 0);
+
+ snd_soc_update_bits(codec, WM8903_BIAS_CONTROL_0,
+ WM8903_STARTUP_BIAS_ENA, 0);
break;
}
@@ -1864,8 +1842,7 @@ static irqreturn_t wm8903_irq(int irq, void *data)
int_val = snd_soc_read(codec, WM8903_INTERRUPT_STATUS_1) & mask;
if (int_val & WM8903_WSEQ_BUSY_EINT) {
- dev_dbg(codec->dev, "Write sequencer done\n");
- complete(&wm8903->wseq);
+ dev_warn(codec->dev, "Write sequencer done\n");
}
/*
@@ -2120,7 +2097,6 @@ static int wm8903_probe(struct snd_soc_codec *codec)
u16 val;
wm8903->codec = codec;
- init_completion(&wm8903->wseq);
ret = snd_soc_codec_set_cache_io(codec, 8, 16, SND_SOC_I2C);
if (ret != 0) {
--
1.7.2.3
^ permalink raw reply related [flat|nested] 4+ messages in thread* Re: [PATCH 1/3] ASoC: Convert WM8903 bias management to use snd_soc_update_bits()
2011-02-10 14:44 [PATCH 1/3] ASoC: Convert WM8903 bias management to use snd_soc_update_bits() Mark Brown
2011-02-10 14:44 ` [PATCH 2/3] ASoC: Don't use write sequencer to power up WM8903 Mark Brown
2011-02-10 14:44 ` [PATCH 3/3] ASoC: Use explicit sequence for WM8903 bias off Mark Brown
@ 2011-02-10 23:05 ` Liam Girdwood
2 siblings, 0 replies; 4+ messages in thread
From: Liam Girdwood @ 2011-02-10 23:05 UTC (permalink / raw)
To: Mark Brown; +Cc: alsa-devel, patches
On Thu, 2011-02-10 at 14:44 +0000, Mark Brown wrote:
> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
> ---
> sound/soc/codecs/wm8903.c | 17 +++++++----------
> 1 files changed, 7 insertions(+), 10 deletions(-)
>
All.
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
--
Freelance Developer, SlimLogic Ltd
ASoC and Voltage Regulator Maintainer.
http://www.slimlogic.co.uk
^ permalink raw reply [flat|nested] 4+ messages in thread