[alsa-devel] [PATCH 1/2] ASoC: axi-i2s: let both capture and playback be optional
Both the capture and playback channels are optional in the axi_i2s IP block. Reflect this in the driver by enabling only the channel(s) that have a DMA.
Signed-off-by: Luca Ceresoli luca@lucaceresoli.net --- sound/soc/adi/axi-i2s.c | 68 +++++++++++++++++++++++++++++------------ 1 file changed, 48 insertions(+), 20 deletions(-)
diff --git a/sound/soc/adi/axi-i2s.c b/sound/soc/adi/axi-i2s.c index 4c23381727a1..273c543e8ff3 100644 --- a/sound/soc/adi/axi-i2s.c +++ b/sound/soc/adi/axi-i2s.c @@ -43,6 +43,9 @@ struct axi_i2s { struct clk *clk; struct clk *clk_ref;
+ bool has_capture; + bool has_playback; + struct snd_soc_dai_driver dai_driver;
struct snd_dmaengine_dai_dma_data capture_dma_data; @@ -136,8 +139,10 @@ static int axi_i2s_dai_probe(struct snd_soc_dai *dai) { struct axi_i2s *i2s = snd_soc_dai_get_drvdata(dai);
- snd_soc_dai_init_dma_data(dai, &i2s->playback_dma_data, - &i2s->capture_dma_data); + snd_soc_dai_init_dma_data( + dai, + i2s->has_playback ? &i2s->playback_dma_data : NULL, + i2s->has_capture ? &i2s->capture_dma_data : NULL);
return 0; } @@ -151,18 +156,6 @@ static const struct snd_soc_dai_ops axi_i2s_dai_ops = {
static struct snd_soc_dai_driver axi_i2s_dai = { .probe = axi_i2s_dai_probe, - .playback = { - .channels_min = 2, - .channels_max = 2, - .rates = SNDRV_PCM_RATE_KNOT, - .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_U32_LE, - }, - .capture = { - .channels_min = 2, - .channels_max = 2, - .rates = SNDRV_PCM_RATE_KNOT, - .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_U32_LE, - }, .ops = &axi_i2s_dai_ops, .symmetric_rates = 1, }; @@ -178,6 +171,19 @@ static const struct regmap_config axi_i2s_regmap_config = { .max_register = AXI_I2S_REG_STATUS, };
+static void axi_i2s_parse_of(struct axi_i2s *i2s, const struct device_node *np) +{ + struct property *dma_names; + const char *dma_name; + + of_property_for_each_string(np, "dma-names", dma_names, dma_name) { + if (strcmp(dma_name, "rx") == 0) + i2s->has_capture = true; + if (strcmp(dma_name, "tx") == 0) + i2s->has_playback = true; + } +} + static int axi_i2s_probe(struct platform_device *pdev) { struct resource *res; @@ -191,6 +197,8 @@ static int axi_i2s_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, i2s);
+ axi_i2s_parse_of(i2s, pdev->dev.of_node); + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); base = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(base)) @@ -213,13 +221,29 @@ static int axi_i2s_probe(struct platform_device *pdev) if (ret) return ret;
- i2s->playback_dma_data.addr = res->start + AXI_I2S_REG_TX_FIFO; - i2s->playback_dma_data.addr_width = 4; - i2s->playback_dma_data.maxburst = 1; + if (i2s->has_playback) { + axi_i2s_dai.playback.channels_min = 2; + axi_i2s_dai.playback.channels_max = 2; + axi_i2s_dai.playback.rates = SNDRV_PCM_RATE_KNOT; + axi_i2s_dai.playback.formats = + SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_U32_LE; + + i2s->playback_dma_data.addr = res->start + AXI_I2S_REG_TX_FIFO; + i2s->playback_dma_data.addr_width = 4; + i2s->playback_dma_data.maxburst = 1; + } + + if (i2s->has_capture) { + axi_i2s_dai.capture.channels_min = 2; + axi_i2s_dai.capture.channels_max = 2; + axi_i2s_dai.capture.rates = SNDRV_PCM_RATE_KNOT; + axi_i2s_dai.capture.formats = + SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_U32_LE;
- i2s->capture_dma_data.addr = res->start + AXI_I2S_REG_RX_FIFO; - i2s->capture_dma_data.addr_width = 4; - i2s->capture_dma_data.maxburst = 1; + i2s->capture_dma_data.addr = res->start + AXI_I2S_REG_RX_FIFO; + i2s->capture_dma_data.addr_width = 4; + i2s->capture_dma_data.maxburst = 1; + }
i2s->ratnum.num = clk_get_rate(i2s->clk_ref) / 2 / AXI_I2S_BITS_PER_FRAME; i2s->ratnum.den_step = 1; @@ -240,6 +264,10 @@ static int axi_i2s_probe(struct platform_device *pdev) if (ret) goto err_clk_disable;
+ dev_info(&pdev->dev, "probed, capture %s, playback %s\n", + i2s->has_capture ? "enabled" : "disabled", + i2s->has_playback ? "enabled" : "disabled"); + return 0;
err_clk_disable:
Both the capture and playback channels are optional in the axi_i2s IP block. Document how to tell the driver which channels are instantiated.
Signed-off-by: Luca Ceresoli luca@lucaceresoli.net --- Documentation/devicetree/bindings/sound/adi,axi-i2s.txt | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/Documentation/devicetree/bindings/sound/adi,axi-i2s.txt b/Documentation/devicetree/bindings/sound/adi,axi-i2s.txt index 4248b662deff..229ad1392cdc 100644 --- a/Documentation/devicetree/bindings/sound/adi,axi-i2s.txt +++ b/Documentation/devicetree/bindings/sound/adi,axi-i2s.txt @@ -1,5 +1,8 @@ ADI AXI-I2S controller
+The core can be generated with transmit (playback), only receive +(capture) or both directions enabled. + Required properties: - compatible : Must be "adi,axi-i2s-1.00.a" - reg : Must contain I2S core's registers location and length @@ -9,8 +12,8 @@ Required properties: - clock-names : "axi" for the clock to the AXI interface, "ref" for the sample rate reference clock. - dmas: Pairs of phandle and specifier for the DMA channels that are used by - the core. The core expects two dma channels, one for transmit and one for - receive. + the core. The core expects two dma channels if both transmit and receive are + enabled, one channel otherwise. - dma-names : "tx" for the transmit channel, "rx" for the receive channel.
For more details on the 'dma', 'dma-names', 'clock' and 'clock-names' properties
The patch
ASoC: axi-i2s: make both "rx" and "tx" optional
has been applied to the asoc tree at
https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git
All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted.
You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed.
If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced.
Please add any relevant lists and maintainers to the CCs when replying to this mail.
Thanks, Mark
From fa225400758dfc7ccddebf4d990f991a435f7921 Mon Sep 17 00:00:00 2001
From: Luca Ceresoli luca@lucaceresoli.net Date: Thu, 7 Mar 2019 22:44:56 +0100 Subject: [PATCH] ASoC: axi-i2s: make both "rx" and "tx" optional
Both the capture and playback channels are optional in the axi_i2s IP block. Document how to tell the driver which channels are instantiated.
Signed-off-by: Luca Ceresoli luca@lucaceresoli.net Signed-off-by: Mark Brown broonie@kernel.org --- Documentation/devicetree/bindings/sound/adi,axi-i2s.txt | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/Documentation/devicetree/bindings/sound/adi,axi-i2s.txt b/Documentation/devicetree/bindings/sound/adi,axi-i2s.txt index 4248b662deff..229ad1392cdc 100644 --- a/Documentation/devicetree/bindings/sound/adi,axi-i2s.txt +++ b/Documentation/devicetree/bindings/sound/adi,axi-i2s.txt @@ -1,5 +1,8 @@ ADI AXI-I2S controller
+The core can be generated with transmit (playback), only receive +(capture) or both directions enabled. + Required properties: - compatible : Must be "adi,axi-i2s-1.00.a" - reg : Must contain I2S core's registers location and length @@ -9,8 +12,8 @@ Required properties: - clock-names : "axi" for the clock to the AXI interface, "ref" for the sample rate reference clock. - dmas: Pairs of phandle and specifier for the DMA channels that are used by - the core. The core expects two dma channels, one for transmit and one for - receive. + the core. The core expects two dma channels if both transmit and receive are + enabled, one channel otherwise. - dma-names : "tx" for the transmit channel, "rx" for the receive channel.
For more details on the 'dma', 'dma-names', 'clock' and 'clock-names' properties
The patch
ASoC: axi-i2s: make both "rx" and "tx" optional
has been applied to the asoc tree at
https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git
All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted.
You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed.
If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced.
Please add any relevant lists and maintainers to the CCs when replying to this mail.
Thanks, Mark
From fa225400758dfc7ccddebf4d990f991a435f7921 Mon Sep 17 00:00:00 2001
From: Luca Ceresoli luca@lucaceresoli.net Date: Thu, 7 Mar 2019 22:44:56 +0100 Subject: [PATCH] ASoC: axi-i2s: make both "rx" and "tx" optional
Both the capture and playback channels are optional in the axi_i2s IP block. Document how to tell the driver which channels are instantiated.
Signed-off-by: Luca Ceresoli luca@lucaceresoli.net Signed-off-by: Mark Brown broonie@kernel.org --- Documentation/devicetree/bindings/sound/adi,axi-i2s.txt | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/Documentation/devicetree/bindings/sound/adi,axi-i2s.txt b/Documentation/devicetree/bindings/sound/adi,axi-i2s.txt index 4248b662deff..229ad1392cdc 100644 --- a/Documentation/devicetree/bindings/sound/adi,axi-i2s.txt +++ b/Documentation/devicetree/bindings/sound/adi,axi-i2s.txt @@ -1,5 +1,8 @@ ADI AXI-I2S controller
+The core can be generated with transmit (playback), only receive +(capture) or both directions enabled. + Required properties: - compatible : Must be "adi,axi-i2s-1.00.a" - reg : Must contain I2S core's registers location and length @@ -9,8 +12,8 @@ Required properties: - clock-names : "axi" for the clock to the AXI interface, "ref" for the sample rate reference clock. - dmas: Pairs of phandle and specifier for the DMA channels that are used by - the core. The core expects two dma channels, one for transmit and one for - receive. + the core. The core expects two dma channels if both transmit and receive are + enabled, one channel otherwise. - dma-names : "tx" for the transmit channel, "rx" for the receive channel.
For more details on the 'dma', 'dma-names', 'clock' and 'clock-names' properties
The patch
ASoC: axi-i2s: make both "rx" and "tx" optional
has been applied to the asoc tree at
https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git
All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted.
You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed.
If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced.
Please add any relevant lists and maintainers to the CCs when replying to this mail.
Thanks, Mark
From fa225400758dfc7ccddebf4d990f991a435f7921 Mon Sep 17 00:00:00 2001
From: Luca Ceresoli luca@lucaceresoli.net Date: Thu, 7 Mar 2019 22:44:56 +0100 Subject: [PATCH] ASoC: axi-i2s: make both "rx" and "tx" optional
Both the capture and playback channels are optional in the axi_i2s IP block. Document how to tell the driver which channels are instantiated.
Signed-off-by: Luca Ceresoli luca@lucaceresoli.net Signed-off-by: Mark Brown broonie@kernel.org --- Documentation/devicetree/bindings/sound/adi,axi-i2s.txt | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/Documentation/devicetree/bindings/sound/adi,axi-i2s.txt b/Documentation/devicetree/bindings/sound/adi,axi-i2s.txt index 4248b662deff..229ad1392cdc 100644 --- a/Documentation/devicetree/bindings/sound/adi,axi-i2s.txt +++ b/Documentation/devicetree/bindings/sound/adi,axi-i2s.txt @@ -1,5 +1,8 @@ ADI AXI-I2S controller
+The core can be generated with transmit (playback), only receive +(capture) or both directions enabled. + Required properties: - compatible : Must be "adi,axi-i2s-1.00.a" - reg : Must contain I2S core's registers location and length @@ -9,8 +12,8 @@ Required properties: - clock-names : "axi" for the clock to the AXI interface, "ref" for the sample rate reference clock. - dmas: Pairs of phandle and specifier for the DMA channels that are used by - the core. The core expects two dma channels, one for transmit and one for - receive. + the core. The core expects two dma channels if both transmit and receive are + enabled, one channel otherwise. - dma-names : "tx" for the transmit channel, "rx" for the receive channel.
For more details on the 'dma', 'dma-names', 'clock' and 'clock-names' properties
The patch
ASoC: axi-i2s: let both capture and playback be optional
has been applied to the asoc tree at
https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git
All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted.
You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed.
If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced.
Please add any relevant lists and maintainers to the CCs when replying to this mail.
Thanks, Mark
From 7bf7d0554890c53478ec04d3d4bfced0c881f6c8 Mon Sep 17 00:00:00 2001
From: Luca Ceresoli luca@lucaceresoli.net Date: Thu, 7 Mar 2019 22:44:55 +0100 Subject: [PATCH] ASoC: axi-i2s: let both capture and playback be optional
Both the capture and playback channels are optional in the axi_i2s IP block. Reflect this in the driver by enabling only the channel(s) that have a DMA.
Signed-off-by: Luca Ceresoli luca@lucaceresoli.net Signed-off-by: Mark Brown broonie@kernel.org --- sound/soc/adi/axi-i2s.c | 68 +++++++++++++++++++++++++++++------------ 1 file changed, 48 insertions(+), 20 deletions(-)
diff --git a/sound/soc/adi/axi-i2s.c b/sound/soc/adi/axi-i2s.c index 4c23381727a1..273c543e8ff3 100644 --- a/sound/soc/adi/axi-i2s.c +++ b/sound/soc/adi/axi-i2s.c @@ -43,6 +43,9 @@ struct axi_i2s { struct clk *clk; struct clk *clk_ref;
+ bool has_capture; + bool has_playback; + struct snd_soc_dai_driver dai_driver;
struct snd_dmaengine_dai_dma_data capture_dma_data; @@ -136,8 +139,10 @@ static int axi_i2s_dai_probe(struct snd_soc_dai *dai) { struct axi_i2s *i2s = snd_soc_dai_get_drvdata(dai);
- snd_soc_dai_init_dma_data(dai, &i2s->playback_dma_data, - &i2s->capture_dma_data); + snd_soc_dai_init_dma_data( + dai, + i2s->has_playback ? &i2s->playback_dma_data : NULL, + i2s->has_capture ? &i2s->capture_dma_data : NULL);
return 0; } @@ -151,18 +156,6 @@ static const struct snd_soc_dai_ops axi_i2s_dai_ops = {
static struct snd_soc_dai_driver axi_i2s_dai = { .probe = axi_i2s_dai_probe, - .playback = { - .channels_min = 2, - .channels_max = 2, - .rates = SNDRV_PCM_RATE_KNOT, - .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_U32_LE, - }, - .capture = { - .channels_min = 2, - .channels_max = 2, - .rates = SNDRV_PCM_RATE_KNOT, - .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_U32_LE, - }, .ops = &axi_i2s_dai_ops, .symmetric_rates = 1, }; @@ -178,6 +171,19 @@ static const struct regmap_config axi_i2s_regmap_config = { .max_register = AXI_I2S_REG_STATUS, };
+static void axi_i2s_parse_of(struct axi_i2s *i2s, const struct device_node *np) +{ + struct property *dma_names; + const char *dma_name; + + of_property_for_each_string(np, "dma-names", dma_names, dma_name) { + if (strcmp(dma_name, "rx") == 0) + i2s->has_capture = true; + if (strcmp(dma_name, "tx") == 0) + i2s->has_playback = true; + } +} + static int axi_i2s_probe(struct platform_device *pdev) { struct resource *res; @@ -191,6 +197,8 @@ static int axi_i2s_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, i2s);
+ axi_i2s_parse_of(i2s, pdev->dev.of_node); + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); base = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(base)) @@ -213,13 +221,29 @@ static int axi_i2s_probe(struct platform_device *pdev) if (ret) return ret;
- i2s->playback_dma_data.addr = res->start + AXI_I2S_REG_TX_FIFO; - i2s->playback_dma_data.addr_width = 4; - i2s->playback_dma_data.maxburst = 1; + if (i2s->has_playback) { + axi_i2s_dai.playback.channels_min = 2; + axi_i2s_dai.playback.channels_max = 2; + axi_i2s_dai.playback.rates = SNDRV_PCM_RATE_KNOT; + axi_i2s_dai.playback.formats = + SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_U32_LE; + + i2s->playback_dma_data.addr = res->start + AXI_I2S_REG_TX_FIFO; + i2s->playback_dma_data.addr_width = 4; + i2s->playback_dma_data.maxburst = 1; + } + + if (i2s->has_capture) { + axi_i2s_dai.capture.channels_min = 2; + axi_i2s_dai.capture.channels_max = 2; + axi_i2s_dai.capture.rates = SNDRV_PCM_RATE_KNOT; + axi_i2s_dai.capture.formats = + SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_U32_LE;
- i2s->capture_dma_data.addr = res->start + AXI_I2S_REG_RX_FIFO; - i2s->capture_dma_data.addr_width = 4; - i2s->capture_dma_data.maxburst = 1; + i2s->capture_dma_data.addr = res->start + AXI_I2S_REG_RX_FIFO; + i2s->capture_dma_data.addr_width = 4; + i2s->capture_dma_data.maxburst = 1; + }
i2s->ratnum.num = clk_get_rate(i2s->clk_ref) / 2 / AXI_I2S_BITS_PER_FRAME; i2s->ratnum.den_step = 1; @@ -240,6 +264,10 @@ static int axi_i2s_probe(struct platform_device *pdev) if (ret) goto err_clk_disable;
+ dev_info(&pdev->dev, "probed, capture %s, playback %s\n", + i2s->has_capture ? "enabled" : "disabled", + i2s->has_playback ? "enabled" : "disabled"); + return 0;
err_clk_disable:
The patch
ASoC: axi-i2s: let both capture and playback be optional
has been applied to the asoc tree at
https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git
All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted.
You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed.
If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced.
Please add any relevant lists and maintainers to the CCs when replying to this mail.
Thanks, Mark
From 7bf7d0554890c53478ec04d3d4bfced0c881f6c8 Mon Sep 17 00:00:00 2001
From: Luca Ceresoli luca@lucaceresoli.net Date: Thu, 7 Mar 2019 22:44:55 +0100 Subject: [PATCH] ASoC: axi-i2s: let both capture and playback be optional
Both the capture and playback channels are optional in the axi_i2s IP block. Reflect this in the driver by enabling only the channel(s) that have a DMA.
Signed-off-by: Luca Ceresoli luca@lucaceresoli.net Signed-off-by: Mark Brown broonie@kernel.org --- sound/soc/adi/axi-i2s.c | 68 +++++++++++++++++++++++++++++------------ 1 file changed, 48 insertions(+), 20 deletions(-)
diff --git a/sound/soc/adi/axi-i2s.c b/sound/soc/adi/axi-i2s.c index 4c23381727a1..273c543e8ff3 100644 --- a/sound/soc/adi/axi-i2s.c +++ b/sound/soc/adi/axi-i2s.c @@ -43,6 +43,9 @@ struct axi_i2s { struct clk *clk; struct clk *clk_ref;
+ bool has_capture; + bool has_playback; + struct snd_soc_dai_driver dai_driver;
struct snd_dmaengine_dai_dma_data capture_dma_data; @@ -136,8 +139,10 @@ static int axi_i2s_dai_probe(struct snd_soc_dai *dai) { struct axi_i2s *i2s = snd_soc_dai_get_drvdata(dai);
- snd_soc_dai_init_dma_data(dai, &i2s->playback_dma_data, - &i2s->capture_dma_data); + snd_soc_dai_init_dma_data( + dai, + i2s->has_playback ? &i2s->playback_dma_data : NULL, + i2s->has_capture ? &i2s->capture_dma_data : NULL);
return 0; } @@ -151,18 +156,6 @@ static const struct snd_soc_dai_ops axi_i2s_dai_ops = {
static struct snd_soc_dai_driver axi_i2s_dai = { .probe = axi_i2s_dai_probe, - .playback = { - .channels_min = 2, - .channels_max = 2, - .rates = SNDRV_PCM_RATE_KNOT, - .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_U32_LE, - }, - .capture = { - .channels_min = 2, - .channels_max = 2, - .rates = SNDRV_PCM_RATE_KNOT, - .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_U32_LE, - }, .ops = &axi_i2s_dai_ops, .symmetric_rates = 1, }; @@ -178,6 +171,19 @@ static const struct regmap_config axi_i2s_regmap_config = { .max_register = AXI_I2S_REG_STATUS, };
+static void axi_i2s_parse_of(struct axi_i2s *i2s, const struct device_node *np) +{ + struct property *dma_names; + const char *dma_name; + + of_property_for_each_string(np, "dma-names", dma_names, dma_name) { + if (strcmp(dma_name, "rx") == 0) + i2s->has_capture = true; + if (strcmp(dma_name, "tx") == 0) + i2s->has_playback = true; + } +} + static int axi_i2s_probe(struct platform_device *pdev) { struct resource *res; @@ -191,6 +197,8 @@ static int axi_i2s_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, i2s);
+ axi_i2s_parse_of(i2s, pdev->dev.of_node); + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); base = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(base)) @@ -213,13 +221,29 @@ static int axi_i2s_probe(struct platform_device *pdev) if (ret) return ret;
- i2s->playback_dma_data.addr = res->start + AXI_I2S_REG_TX_FIFO; - i2s->playback_dma_data.addr_width = 4; - i2s->playback_dma_data.maxburst = 1; + if (i2s->has_playback) { + axi_i2s_dai.playback.channels_min = 2; + axi_i2s_dai.playback.channels_max = 2; + axi_i2s_dai.playback.rates = SNDRV_PCM_RATE_KNOT; + axi_i2s_dai.playback.formats = + SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_U32_LE; + + i2s->playback_dma_data.addr = res->start + AXI_I2S_REG_TX_FIFO; + i2s->playback_dma_data.addr_width = 4; + i2s->playback_dma_data.maxburst = 1; + } + + if (i2s->has_capture) { + axi_i2s_dai.capture.channels_min = 2; + axi_i2s_dai.capture.channels_max = 2; + axi_i2s_dai.capture.rates = SNDRV_PCM_RATE_KNOT; + axi_i2s_dai.capture.formats = + SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_U32_LE;
- i2s->capture_dma_data.addr = res->start + AXI_I2S_REG_RX_FIFO; - i2s->capture_dma_data.addr_width = 4; - i2s->capture_dma_data.maxburst = 1; + i2s->capture_dma_data.addr = res->start + AXI_I2S_REG_RX_FIFO; + i2s->capture_dma_data.addr_width = 4; + i2s->capture_dma_data.maxburst = 1; + }
i2s->ratnum.num = clk_get_rate(i2s->clk_ref) / 2 / AXI_I2S_BITS_PER_FRAME; i2s->ratnum.den_step = 1; @@ -240,6 +264,10 @@ static int axi_i2s_probe(struct platform_device *pdev) if (ret) goto err_clk_disable;
+ dev_info(&pdev->dev, "probed, capture %s, playback %s\n", + i2s->has_capture ? "enabled" : "disabled", + i2s->has_playback ? "enabled" : "disabled"); + return 0;
err_clk_disable:
The patch
ASoC: axi-i2s: let both capture and playback be optional
has been applied to the asoc tree at
https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git
All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted.
You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed.
If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced.
Please add any relevant lists and maintainers to the CCs when replying to this mail.
Thanks, Mark
From 7bf7d0554890c53478ec04d3d4bfced0c881f6c8 Mon Sep 17 00:00:00 2001
From: Luca Ceresoli luca@lucaceresoli.net Date: Thu, 7 Mar 2019 22:44:55 +0100 Subject: [PATCH] ASoC: axi-i2s: let both capture and playback be optional
Both the capture and playback channels are optional in the axi_i2s IP block. Reflect this in the driver by enabling only the channel(s) that have a DMA.
Signed-off-by: Luca Ceresoli luca@lucaceresoli.net Signed-off-by: Mark Brown broonie@kernel.org --- sound/soc/adi/axi-i2s.c | 68 +++++++++++++++++++++++++++++------------ 1 file changed, 48 insertions(+), 20 deletions(-)
diff --git a/sound/soc/adi/axi-i2s.c b/sound/soc/adi/axi-i2s.c index 4c23381727a1..273c543e8ff3 100644 --- a/sound/soc/adi/axi-i2s.c +++ b/sound/soc/adi/axi-i2s.c @@ -43,6 +43,9 @@ struct axi_i2s { struct clk *clk; struct clk *clk_ref;
+ bool has_capture; + bool has_playback; + struct snd_soc_dai_driver dai_driver;
struct snd_dmaengine_dai_dma_data capture_dma_data; @@ -136,8 +139,10 @@ static int axi_i2s_dai_probe(struct snd_soc_dai *dai) { struct axi_i2s *i2s = snd_soc_dai_get_drvdata(dai);
- snd_soc_dai_init_dma_data(dai, &i2s->playback_dma_data, - &i2s->capture_dma_data); + snd_soc_dai_init_dma_data( + dai, + i2s->has_playback ? &i2s->playback_dma_data : NULL, + i2s->has_capture ? &i2s->capture_dma_data : NULL);
return 0; } @@ -151,18 +156,6 @@ static const struct snd_soc_dai_ops axi_i2s_dai_ops = {
static struct snd_soc_dai_driver axi_i2s_dai = { .probe = axi_i2s_dai_probe, - .playback = { - .channels_min = 2, - .channels_max = 2, - .rates = SNDRV_PCM_RATE_KNOT, - .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_U32_LE, - }, - .capture = { - .channels_min = 2, - .channels_max = 2, - .rates = SNDRV_PCM_RATE_KNOT, - .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_U32_LE, - }, .ops = &axi_i2s_dai_ops, .symmetric_rates = 1, }; @@ -178,6 +171,19 @@ static const struct regmap_config axi_i2s_regmap_config = { .max_register = AXI_I2S_REG_STATUS, };
+static void axi_i2s_parse_of(struct axi_i2s *i2s, const struct device_node *np) +{ + struct property *dma_names; + const char *dma_name; + + of_property_for_each_string(np, "dma-names", dma_names, dma_name) { + if (strcmp(dma_name, "rx") == 0) + i2s->has_capture = true; + if (strcmp(dma_name, "tx") == 0) + i2s->has_playback = true; + } +} + static int axi_i2s_probe(struct platform_device *pdev) { struct resource *res; @@ -191,6 +197,8 @@ static int axi_i2s_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, i2s);
+ axi_i2s_parse_of(i2s, pdev->dev.of_node); + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); base = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(base)) @@ -213,13 +221,29 @@ static int axi_i2s_probe(struct platform_device *pdev) if (ret) return ret;
- i2s->playback_dma_data.addr = res->start + AXI_I2S_REG_TX_FIFO; - i2s->playback_dma_data.addr_width = 4; - i2s->playback_dma_data.maxburst = 1; + if (i2s->has_playback) { + axi_i2s_dai.playback.channels_min = 2; + axi_i2s_dai.playback.channels_max = 2; + axi_i2s_dai.playback.rates = SNDRV_PCM_RATE_KNOT; + axi_i2s_dai.playback.formats = + SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_U32_LE; + + i2s->playback_dma_data.addr = res->start + AXI_I2S_REG_TX_FIFO; + i2s->playback_dma_data.addr_width = 4; + i2s->playback_dma_data.maxburst = 1; + } + + if (i2s->has_capture) { + axi_i2s_dai.capture.channels_min = 2; + axi_i2s_dai.capture.channels_max = 2; + axi_i2s_dai.capture.rates = SNDRV_PCM_RATE_KNOT; + axi_i2s_dai.capture.formats = + SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_U32_LE;
- i2s->capture_dma_data.addr = res->start + AXI_I2S_REG_RX_FIFO; - i2s->capture_dma_data.addr_width = 4; - i2s->capture_dma_data.maxburst = 1; + i2s->capture_dma_data.addr = res->start + AXI_I2S_REG_RX_FIFO; + i2s->capture_dma_data.addr_width = 4; + i2s->capture_dma_data.maxburst = 1; + }
i2s->ratnum.num = clk_get_rate(i2s->clk_ref) / 2 / AXI_I2S_BITS_PER_FRAME; i2s->ratnum.den_step = 1; @@ -240,6 +264,10 @@ static int axi_i2s_probe(struct platform_device *pdev) if (ret) goto err_clk_disable;
+ dev_info(&pdev->dev, "probed, capture %s, playback %s\n", + i2s->has_capture ? "enabled" : "disabled", + i2s->has_playback ? "enabled" : "disabled"); + return 0;
err_clk_disable:
participants (2)
-
Luca Ceresoli -
Mark Brown