* [PATCHv2] ASoC: fsl-sai: using 'lsb-first' property instead of 'big-endian-data'.
@ 2014-08-29 7:12 ` Xiubo Li
0 siblings, 0 replies; 14+ messages in thread
From: Xiubo Li @ 2014-08-29 7:12 UTC (permalink / raw)
To: broonie-DgEjT+Ai2ygdnm+yROfE0A, alsa-devel-K7yf7f+aM1XWsZ/bQMPhNw,
nicoleotsuka-Re5JQEeQqe8AvxtiuMwx3w
Cc: linux-kernel-u79uwXL29TY76Z2rM5mHXA,
devicetree-u79uwXL29TY76Z2rM5mHXA, Xiubo Li
The 'big-endian-data' property is originally used to indicate whether the
LSB firstly or MSB firstly will be transmitted to the CODEC or received
from the CODEC, and there has nothing relation to the memory data.
Generally, if the audio data in big endian format, which will be using the
bytes reversion, Here this can only be used to bits reversion.
So using the 'lsb-first' instead of 'big-endian-data' can make the code
to be readable easier and more easy to understand what this property is
used to do.
This property used for configuring whether the LSB or the MSB is transmitted
first for the fifo data.
Signed-off-by: Xiubo Li <Li.Xiubo-KZfg59tc24xl57MIdRCFDg@public.gmane.org>
Cc: Nicolin Chen <nicoleotsuka-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
---
Documentation/devicetree/bindings/sound/fsl-sai.txt | 8 ++++----
sound/soc/fsl/fsl_sai.c | 6 +++---
sound/soc/fsl/fsl_sai.h | 2 +-
3 files changed, 8 insertions(+), 8 deletions(-)
diff --git a/Documentation/devicetree/bindings/sound/fsl-sai.txt b/Documentation/devicetree/bindings/sound/fsl-sai.txt
index 06a405e..4956b14 100644
--- a/Documentation/devicetree/bindings/sound/fsl-sai.txt
+++ b/Documentation/devicetree/bindings/sound/fsl-sai.txt
@@ -20,9 +20,9 @@ Required properties:
See ../pinctrl/pinctrl-bindings.txt for details of the property values.
- big-endian: Boolean property, required if all the FTM_PWM registers
are big-endian rather than little-endian.
-- big-endian-data: If this property is absent, the little endian mode will
- be in use as default, or the big endian mode will be in use for all the
- fifo data.
+- lsb-first: Configures whether the LSB or the MSB is transmitted first for
+ the fifo data. If this property is absent, the MSB is transmitted first as
+ default, or the LSB is transmitted first.
- fsl,sai-synchronous-rx: This is a boolean property. If present, indicating
that SAI will work in the synchronous mode (sync Tx with Rx) which means
both the transimitter and receiver will send and receive data by following
@@ -53,5 +53,5 @@ sai2: sai@40031000 {
dmas = <&edma0 0 VF610_EDMA_MUXID0_SAI2_TX>,
<&edma0 0 VF610_EDMA_MUXID0_SAI2_RX>;
big-endian;
- big-endian-data;
+ lsb-first;
};
diff --git a/sound/soc/fsl/fsl_sai.c b/sound/soc/fsl/fsl_sai.c
index a6eb784..7eeb1dd 100644
--- a/sound/soc/fsl/fsl_sai.c
+++ b/sound/soc/fsl/fsl_sai.c
@@ -175,7 +175,7 @@ static int fsl_sai_set_dai_fmt_tr(struct snd_soc_dai *cpu_dai,
bool tx = fsl_dir == FSL_FMT_TRANSMITTER;
u32 val_cr2 = 0, val_cr4 = 0;
- if (!sai->big_endian_data)
+ if (!sai->is_lsb_first)
val_cr4 |= FSL_SAI_CR4_MF;
/* DAI mode */
@@ -304,7 +304,7 @@ static int fsl_sai_hw_params(struct snd_pcm_substream *substream,
val_cr5 |= FSL_SAI_CR5_WNW(word_width);
val_cr5 |= FSL_SAI_CR5_W0W(word_width);
- if (sai->big_endian_data)
+ if (sai->is_lsb_first)
val_cr5 |= FSL_SAI_CR5_FBT(0);
else
val_cr5 |= FSL_SAI_CR5_FBT(word_width - 1);
@@ -573,7 +573,7 @@ static int fsl_sai_probe(struct platform_device *pdev)
if (of_device_is_compatible(pdev->dev.of_node, "fsl,imx6sx-sai"))
sai->sai_on_imx = true;
- sai->big_endian_data = of_property_read_bool(np, "big-endian-data");
+ sai->is_lsb_first = of_property_read_bool(np, "lsb-first");
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
base = devm_ioremap_resource(&pdev->dev, res);
diff --git a/sound/soc/fsl/fsl_sai.h b/sound/soc/fsl/fsl_sai.h
index 2cded44..3466720 100644
--- a/sound/soc/fsl/fsl_sai.h
+++ b/sound/soc/fsl/fsl_sai.h
@@ -132,7 +132,7 @@ struct fsl_sai {
struct clk *bus_clk;
struct clk *mclk_clk[FSL_SAI_MCLK_MAX];
- bool big_endian_data;
+ bool is_lsb_first;
bool is_dsp_mode;
bool sai_on_imx;
bool synchronous[2];
--
1.8.5
--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
^ permalink raw reply related [flat|nested] 14+ messages in thread* [PATCHv2] ASoC: fsl-sai: using 'lsb-first' property instead of 'big-endian-data'.
@ 2014-08-29 7:12 ` Xiubo Li
0 siblings, 0 replies; 14+ messages in thread
From: Xiubo Li @ 2014-08-29 7:12 UTC (permalink / raw)
To: broonie, alsa-devel, nicoleotsuka; +Cc: linux-kernel, devicetree, Xiubo Li
The 'big-endian-data' property is originally used to indicate whether the
LSB firstly or MSB firstly will be transmitted to the CODEC or received
from the CODEC, and there has nothing relation to the memory data.
Generally, if the audio data in big endian format, which will be using the
bytes reversion, Here this can only be used to bits reversion.
So using the 'lsb-first' instead of 'big-endian-data' can make the code
to be readable easier and more easy to understand what this property is
used to do.
This property used for configuring whether the LSB or the MSB is transmitted
first for the fifo data.
Signed-off-by: Xiubo Li <Li.Xiubo@freescale.com>
Cc: Nicolin Chen <nicoleotsuka@gmail.com>
---
Documentation/devicetree/bindings/sound/fsl-sai.txt | 8 ++++----
sound/soc/fsl/fsl_sai.c | 6 +++---
sound/soc/fsl/fsl_sai.h | 2 +-
3 files changed, 8 insertions(+), 8 deletions(-)
diff --git a/Documentation/devicetree/bindings/sound/fsl-sai.txt b/Documentation/devicetree/bindings/sound/fsl-sai.txt
index 06a405e..4956b14 100644
--- a/Documentation/devicetree/bindings/sound/fsl-sai.txt
+++ b/Documentation/devicetree/bindings/sound/fsl-sai.txt
@@ -20,9 +20,9 @@ Required properties:
See ../pinctrl/pinctrl-bindings.txt for details of the property values.
- big-endian: Boolean property, required if all the FTM_PWM registers
are big-endian rather than little-endian.
-- big-endian-data: If this property is absent, the little endian mode will
- be in use as default, or the big endian mode will be in use for all the
- fifo data.
+- lsb-first: Configures whether the LSB or the MSB is transmitted first for
+ the fifo data. If this property is absent, the MSB is transmitted first as
+ default, or the LSB is transmitted first.
- fsl,sai-synchronous-rx: This is a boolean property. If present, indicating
that SAI will work in the synchronous mode (sync Tx with Rx) which means
both the transimitter and receiver will send and receive data by following
@@ -53,5 +53,5 @@ sai2: sai@40031000 {
dmas = <&edma0 0 VF610_EDMA_MUXID0_SAI2_TX>,
<&edma0 0 VF610_EDMA_MUXID0_SAI2_RX>;
big-endian;
- big-endian-data;
+ lsb-first;
};
diff --git a/sound/soc/fsl/fsl_sai.c b/sound/soc/fsl/fsl_sai.c
index a6eb784..7eeb1dd 100644
--- a/sound/soc/fsl/fsl_sai.c
+++ b/sound/soc/fsl/fsl_sai.c
@@ -175,7 +175,7 @@ static int fsl_sai_set_dai_fmt_tr(struct snd_soc_dai *cpu_dai,
bool tx = fsl_dir == FSL_FMT_TRANSMITTER;
u32 val_cr2 = 0, val_cr4 = 0;
- if (!sai->big_endian_data)
+ if (!sai->is_lsb_first)
val_cr4 |= FSL_SAI_CR4_MF;
/* DAI mode */
@@ -304,7 +304,7 @@ static int fsl_sai_hw_params(struct snd_pcm_substream *substream,
val_cr5 |= FSL_SAI_CR5_WNW(word_width);
val_cr5 |= FSL_SAI_CR5_W0W(word_width);
- if (sai->big_endian_data)
+ if (sai->is_lsb_first)
val_cr5 |= FSL_SAI_CR5_FBT(0);
else
val_cr5 |= FSL_SAI_CR5_FBT(word_width - 1);
@@ -573,7 +573,7 @@ static int fsl_sai_probe(struct platform_device *pdev)
if (of_device_is_compatible(pdev->dev.of_node, "fsl,imx6sx-sai"))
sai->sai_on_imx = true;
- sai->big_endian_data = of_property_read_bool(np, "big-endian-data");
+ sai->is_lsb_first = of_property_read_bool(np, "lsb-first");
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
base = devm_ioremap_resource(&pdev->dev, res);
diff --git a/sound/soc/fsl/fsl_sai.h b/sound/soc/fsl/fsl_sai.h
index 2cded44..3466720 100644
--- a/sound/soc/fsl/fsl_sai.h
+++ b/sound/soc/fsl/fsl_sai.h
@@ -132,7 +132,7 @@ struct fsl_sai {
struct clk *bus_clk;
struct clk *mclk_clk[FSL_SAI_MCLK_MAX];
- bool big_endian_data;
+ bool is_lsb_first;
bool is_dsp_mode;
bool sai_on_imx;
bool synchronous[2];
--
1.8.5
^ permalink raw reply related [flat|nested] 14+ messages in thread[parent not found: <1409296332-39318-1-git-send-email-Li.Xiubo-KZfg59tc24xl57MIdRCFDg@public.gmane.org>]
* Re: [PATCHv2] ASoC: fsl-sai: using 'lsb-first' property instead of 'big-endian-data'.
2014-08-29 7:12 ` Xiubo Li
@ 2014-08-29 11:06 ` Mark Rutland
-1 siblings, 0 replies; 14+ messages in thread
From: Mark Rutland @ 2014-08-29 11:06 UTC (permalink / raw)
To: Xiubo Li
Cc: broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org,
alsa-devel-K7yf7f+aM1XWsZ/bQMPhNw@public.gmane.org,
nicoleotsuka-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
On Fri, Aug 29, 2014 at 08:12:12AM +0100, Xiubo Li wrote:
> The 'big-endian-data' property is originally used to indicate whether the
> LSB firstly or MSB firstly will be transmitted to the CODEC or received
> from the CODEC, and there has nothing relation to the memory data.
>
> Generally, if the audio data in big endian format, which will be using the
> bytes reversion, Here this can only be used to bits reversion.
>
> So using the 'lsb-first' instead of 'big-endian-data' can make the code
> to be readable easier and more easy to understand what this property is
> used to do.
>
> This property used for configuring whether the LSB or the MSB is transmitted
> first for the fifo data.
>
> Signed-off-by: Xiubo Li <Li.Xiubo-KZfg59tc24xl57MIdRCFDg@public.gmane.org>
> Cc: Nicolin Chen <nicoleotsuka-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> ---
> Documentation/devicetree/bindings/sound/fsl-sai.txt | 8 ++++----
> sound/soc/fsl/fsl_sai.c | 6 +++---
> sound/soc/fsl/fsl_sai.h | 2 +-
> 3 files changed, 8 insertions(+), 8 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/sound/fsl-sai.txt b/Documentation/devicetree/bindings/sound/fsl-sai.txt
> index 06a405e..4956b14 100644
> --- a/Documentation/devicetree/bindings/sound/fsl-sai.txt
> +++ b/Documentation/devicetree/bindings/sound/fsl-sai.txt
> @@ -20,9 +20,9 @@ Required properties:
> See ../pinctrl/pinctrl-bindings.txt for details of the property values.
> - big-endian: Boolean property, required if all the FTM_PWM registers
> are big-endian rather than little-endian.
> -- big-endian-data: If this property is absent, the little endian mode will
> - be in use as default, or the big endian mode will be in use for all the
> - fifo data.
> +- lsb-first: Configures whether the LSB or the MSB is transmitted first for
> + the fifo data. If this property is absent, the MSB is transmitted first as
> + default, or the LSB is transmitted first.
Both Nicolin [1] and Mark [2] asked for the old property to be kept
around for compatibility reasons. Those requests seem to have been
ignored entirely; the commit message doesn't even describe why you
believe removing support for the old property is safe.
So NAK unless this patch is updated to either:
- Keep support for the old property, but mark it as deprecated in the
documentation (having a warning if said property is used is also
fine).
- Describe why it is safe to remove the property outright, and both Mark
and Nicolin agree that this is fine.
The former is the preferred way of doing things, and the latter should
be the exceptional case. We don't even save much here my dropping
support for the old property.
I have no proeprty with addition of the the new property; the rationale
for the new naming makes sense to me.
Thanks,
Mark.
[1] http://lkml.kernel.org/r/20140827070544.GO17528-GFdadSzt00ze9xe1eoZjHA@public.gmane.org
[2] http://lkml.kernel.org/r/CAGoOwPSTJaT0UA4yaYR0x49C8UHbmKAR8PzUfV9ZWVW5XBfV5w-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org
--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [PATCHv2] ASoC: fsl-sai: using 'lsb-first' property instead of 'big-endian-data'.
@ 2014-08-29 11:06 ` Mark Rutland
0 siblings, 0 replies; 14+ messages in thread
From: Mark Rutland @ 2014-08-29 11:06 UTC (permalink / raw)
To: Xiubo Li
Cc: broonie@kernel.org, alsa-devel@alsa-project.org,
nicoleotsuka@gmail.com, linux-kernel@vger.kernel.org,
devicetree@vger.kernel.org
On Fri, Aug 29, 2014 at 08:12:12AM +0100, Xiubo Li wrote:
> The 'big-endian-data' property is originally used to indicate whether the
> LSB firstly or MSB firstly will be transmitted to the CODEC or received
> from the CODEC, and there has nothing relation to the memory data.
>
> Generally, if the audio data in big endian format, which will be using the
> bytes reversion, Here this can only be used to bits reversion.
>
> So using the 'lsb-first' instead of 'big-endian-data' can make the code
> to be readable easier and more easy to understand what this property is
> used to do.
>
> This property used for configuring whether the LSB or the MSB is transmitted
> first for the fifo data.
>
> Signed-off-by: Xiubo Li <Li.Xiubo@freescale.com>
> Cc: Nicolin Chen <nicoleotsuka@gmail.com>
> ---
> Documentation/devicetree/bindings/sound/fsl-sai.txt | 8 ++++----
> sound/soc/fsl/fsl_sai.c | 6 +++---
> sound/soc/fsl/fsl_sai.h | 2 +-
> 3 files changed, 8 insertions(+), 8 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/sound/fsl-sai.txt b/Documentation/devicetree/bindings/sound/fsl-sai.txt
> index 06a405e..4956b14 100644
> --- a/Documentation/devicetree/bindings/sound/fsl-sai.txt
> +++ b/Documentation/devicetree/bindings/sound/fsl-sai.txt
> @@ -20,9 +20,9 @@ Required properties:
> See ../pinctrl/pinctrl-bindings.txt for details of the property values.
> - big-endian: Boolean property, required if all the FTM_PWM registers
> are big-endian rather than little-endian.
> -- big-endian-data: If this property is absent, the little endian mode will
> - be in use as default, or the big endian mode will be in use for all the
> - fifo data.
> +- lsb-first: Configures whether the LSB or the MSB is transmitted first for
> + the fifo data. If this property is absent, the MSB is transmitted first as
> + default, or the LSB is transmitted first.
Both Nicolin [1] and Mark [2] asked for the old property to be kept
around for compatibility reasons. Those requests seem to have been
ignored entirely; the commit message doesn't even describe why you
believe removing support for the old property is safe.
So NAK unless this patch is updated to either:
- Keep support for the old property, but mark it as deprecated in the
documentation (having a warning if said property is used is also
fine).
- Describe why it is safe to remove the property outright, and both Mark
and Nicolin agree that this is fine.
The former is the preferred way of doing things, and the latter should
be the exceptional case. We don't even save much here my dropping
support for the old property.
I have no proeprty with addition of the the new property; the rationale
for the new naming makes sense to me.
Thanks,
Mark.
[1] http://lkml.kernel.org/r/20140827070544.GO17528@sirena.org.uk
[2] http://lkml.kernel.org/r/CAGoOwPSTJaT0UA4yaYR0x49C8UHbmKAR8PzUfV9ZWVW5XBfV5w@mail.gmail.com
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [PATCHv2] ASoC: fsl-sai: using 'lsb-first' property instead of 'big-endian-data'.
2014-08-29 11:06 ` Mark Rutland
(?)
@ 2014-08-29 11:59 ` Mark Brown
[not found] ` <20140829115943.GV29327-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
-1 siblings, 1 reply; 14+ messages in thread
From: Mark Brown @ 2014-08-29 11:59 UTC (permalink / raw)
To: Mark Rutland
Cc: Xiubo Li, alsa-devel@alsa-project.org, nicoleotsuka@gmail.com,
linux-kernel@vger.kernel.org, devicetree@vger.kernel.org
[-- Attachment #1: Type: text/plain, Size: 820 bytes --]
On Fri, Aug 29, 2014 at 12:06:01PM +0100, Mark Rutland wrote:
> On Fri, Aug 29, 2014 at 08:12:12AM +0100, Xiubo Li wrote:
> > The 'big-endian-data' property is originally used to indicate whether the
> > LSB firstly or MSB firstly will be transmitted to the CODEC or received
> > from the CODEC, and there has nothing relation to the memory data.
> Both Nicolin [1] and Mark [2] asked for the old property to be kept
> around for compatibility reasons. Those requests seem to have been
> ignored entirely; the commit message doesn't even describe why you
> believe removing support for the old property is safe.
The response was that the relevant chips aren't out in the wild so it's
vanishingly unlikely that anyone would have a real DT with this option
enabled. I'll defer to Nicolin on if that's the case or not.
[-- Attachment #2: Digital signature --]
[-- Type: application/pgp-signature, Size: 819 bytes --]
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [PATCHv2] ASoC: fsl-sai: using 'lsb-first' property instead of 'big-endian-data'.
2014-08-29 7:12 ` Xiubo Li
@ 2014-09-01 15:37 ` Mark Brown
-1 siblings, 0 replies; 14+ messages in thread
From: Mark Brown @ 2014-09-01 15:37 UTC (permalink / raw)
To: Xiubo Li
Cc: alsa-devel-K7yf7f+aM1XWsZ/bQMPhNw,
nicoleotsuka-Re5JQEeQqe8AvxtiuMwx3w,
linux-kernel-u79uwXL29TY76Z2rM5mHXA,
devicetree-u79uwXL29TY76Z2rM5mHXA
[-- Attachment #1: Type: text/plain, Size: 295 bytes --]
On Fri, Aug 29, 2014 at 03:12:12PM +0800, Xiubo Li wrote:
> The 'big-endian-data' property is originally used to indicate whether the
> LSB firstly or MSB firstly will be transmitted to the CODEC or received
> from the CODEC, and there has nothing relation to the memory data.
Applied, thanks.
[-- Attachment #2: Digital signature --]
[-- Type: application/pgp-signature, Size: 819 bytes --]
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [PATCHv2] ASoC: fsl-sai: using 'lsb-first' property instead of 'big-endian-data'.
@ 2014-09-01 15:37 ` Mark Brown
0 siblings, 0 replies; 14+ messages in thread
From: Mark Brown @ 2014-09-01 15:37 UTC (permalink / raw)
To: Xiubo Li; +Cc: alsa-devel, nicoleotsuka, linux-kernel, devicetree
[-- Attachment #1: Type: text/plain, Size: 295 bytes --]
On Fri, Aug 29, 2014 at 03:12:12PM +0800, Xiubo Li wrote:
> The 'big-endian-data' property is originally used to indicate whether the
> LSB firstly or MSB firstly will be transmitted to the CODEC or received
> from the CODEC, and there has nothing relation to the memory data.
Applied, thanks.
[-- Attachment #2: Digital signature --]
[-- Type: application/pgp-signature, Size: 819 bytes --]
^ permalink raw reply [flat|nested] 14+ messages in thread
end of thread, other threads:[~2014-09-01 15:37 UTC | newest]
Thread overview: 14+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2014-08-29 7:12 [PATCHv2] ASoC: fsl-sai: using 'lsb-first' property instead of 'big-endian-data' Xiubo Li
2014-08-29 7:12 ` Xiubo Li
[not found] ` <1409296332-39318-1-git-send-email-Li.Xiubo-KZfg59tc24xl57MIdRCFDg@public.gmane.org>
2014-08-29 11:06 ` Mark Rutland
2014-08-29 11:06 ` Mark Rutland
2014-08-29 11:59 ` Mark Brown
[not found] ` <20140829115943.GV29327-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2014-08-29 16:40 ` Nicolin Chen
2014-08-29 16:40 ` Nicolin Chen
2014-08-29 17:26 ` Mark Rutland
2014-08-29 17:40 ` Nicolin Chen
2014-08-29 19:11 ` Mark Brown
2014-08-29 19:11 ` Mark Brown
2014-08-29 19:18 ` Nicolin Chen
2014-09-01 15:37 ` Mark Brown
2014-09-01 15:37 ` Mark Brown
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.