Re: [PATCH 1/3] ASoC: samsung: pass DMA channels as pointers

From: Krzysztof Kozlowski
Date: Mon Nov 16 2015 - 20:16:50 EST

On 14.11.2015 02:22, Arnd Bergmann wrote:
> ARM64 allmodconfig produces a bunch of warnings when building the
> samsung ASoC code:
>
> sound/soc/samsung/dmaengine.c: In function 'samsung_asoc_init_dma_data':
> sound/soc/samsung/dmaengine.c:53:32: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
> playback_data->filter_data = (void *)playback->channel;
> sound/soc/samsung/dmaengine.c:60:31: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
> capture_data->filter_data = (void *)capture->channel;
>
> We could easily shut up the warning by adding an intermediate cast,
> but there is a bigger underlying problem: The use of IORESOURCE_DMA
> to pass data from platform code to device drivers is dubious to start
> with, as what we really want is a pointer that can be passed into
> a filter function.
>
> Note that on s3c64xx, the pl08x DMA data is already a pointer, but
> gets cast to resource_size_t so we can pass it as a resource, and it
> then gets converted back to a pointer. In contrast, the data we pass
> for s3c24xx is an index into a device specific table, and we artificially
> convert that into a pointer for the filter function.
>
> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>

The patch looks good. I have only two questions below.

>
> diff --git a/arch/arm/mach-s3c64xx/dev-audio.c b/arch/arm/mach-s3c64xx/dev-audio.c
> index ff780a8d8366..9a42736ef4ac 100644
> --- a/arch/arm/mach-s3c64xx/dev-audio.c
> +++ b/arch/arm/mach-s3c64xx/dev-audio.c
> @@ -54,12 +54,12 @@ static int s3c64xx_i2s_cfg_gpio(struct platform_device *pdev)
>
> static struct resource s3c64xx_iis0_resource[] = {
> [0] = DEFINE_RES_MEM(S3C64XX_PA_IIS0, SZ_256),
> - [1] = DEFINE_RES_DMA(DMACH_I2S0_OUT),
> - [2] = DEFINE_RES_DMA(DMACH_I2S0_IN),
> };
>
> -static struct s3c_audio_pdata i2sv3_pdata = {
> +static struct s3c_audio_pdata i2s0_pdata = {
> .cfg_gpio = s3c64xx_i2s_cfg_gpio,
> + .dma_playback = DMACH_I2S0_OUT,
> + .dma_capture = DMACH_I2S0_IN,
> };
>
> struct platform_device s3c64xx_device_iis0 = {
> @@ -68,15 +68,19 @@ struct platform_device s3c64xx_device_iis0 = {
> .num_resources = ARRAY_SIZE(s3c64xx_iis0_resource),
> .resource = s3c64xx_iis0_resource,
> .dev = {
> - .platform_data = &i2sv3_pdata,
> + .platform_data = &i2s0_pdata,
> },
> };
> EXPORT_SYMBOL(s3c64xx_device_iis0);
>
> static struct resource s3c64xx_iis1_resource[] = {
> [0] = DEFINE_RES_MEM(S3C64XX_PA_IIS1, SZ_256),
> - [1] = DEFINE_RES_DMA(DMACH_I2S1_OUT),
> - [2] = DEFINE_RES_DMA(DMACH_I2S1_IN),
> +};
> +
> +static struct s3c_audio_pdata i2s1_pdata = {
> + .cfg_gpio = s3c64xx_i2s_cfg_gpio,
> + .dma_playback = DMACH_I2S1_OUT,
> + .dma_capture = DMACH_I2S1_IN,
> };
>
> struct platform_device s3c64xx_device_iis1 = {
> @@ -85,19 +89,19 @@ struct platform_device s3c64xx_device_iis1 = {
> .num_resources = ARRAY_SIZE(s3c64xx_iis1_resource),
> .resource = s3c64xx_iis1_resource,
> .dev = {
> - .platform_data = &i2sv3_pdata,
> + .platform_data = &i2s1_pdata,
> },
> };
> EXPORT_SYMBOL(s3c64xx_device_iis1);
>
> static struct resource s3c64xx_iisv4_resource[] = {
> [0] = DEFINE_RES_MEM(S3C64XX_PA_IISV4, SZ_256),
> - [1] = DEFINE_RES_DMA(DMACH_HSI_I2SV40_TX),
> - [2] = DEFINE_RES_DMA(DMACH_HSI_I2SV40_RX),
> };
>
> static struct s3c_audio_pdata i2sv4_pdata = {
> .cfg_gpio = s3c64xx_i2s_cfg_gpio,
> + .dma_playback = DMACH_HSI_I2SV40_TX,
> + .dma_capture = DMACH_HSI_I2SV40_RX,
> .type = {
> .i2s = {
> .quirks = QUIRK_PRI_6CHAN,
> @@ -142,12 +146,12 @@ static int s3c64xx_pcm_cfg_gpio(struct platform_device *pdev)
>
> static struct resource s3c64xx_pcm0_resource[] = {
> [0] = DEFINE_RES_MEM(S3C64XX_PA_PCM0, SZ_256),
> - [1] = DEFINE_RES_DMA(DMACH_PCM0_TX),
> - [2] = DEFINE_RES_DMA(DMACH_PCM0_RX),
> };
>
> static struct s3c_audio_pdata s3c_pcm0_pdata = {
> .cfg_gpio = s3c64xx_pcm_cfg_gpio,
> + .dma_capture = DMACH_PCM0_RX,
> + .dma_playback = DMACH_PCM0_TX,
> };
>
> struct platform_device s3c64xx_device_pcm0 = {
> @@ -163,12 +167,12 @@ EXPORT_SYMBOL(s3c64xx_device_pcm0);
>
> static struct resource s3c64xx_pcm1_resource[] = {
> [0] = DEFINE_RES_MEM(S3C64XX_PA_PCM1, SZ_256),
> - [1] = DEFINE_RES_DMA(DMACH_PCM1_TX),
> - [2] = DEFINE_RES_DMA(DMACH_PCM1_RX),
> };
>
> static struct s3c_audio_pdata s3c_pcm1_pdata = {
> .cfg_gpio = s3c64xx_pcm_cfg_gpio,
> + .dma_playback = DMACH_PCM1_TX,
> + .dma_capture = DMACH_PCM1_RX,
> };
>
> struct platform_device s3c64xx_device_pcm1 = {
> @@ -196,13 +200,14 @@ static int s3c64xx_ac97_cfg_gpe(struct platform_device *pdev)
>
> static struct resource s3c64xx_ac97_resource[] = {
> [0] = DEFINE_RES_MEM(S3C64XX_PA_AC97, SZ_256),
> - [1] = DEFINE_RES_DMA(DMACH_AC97_PCMOUT),
> - [2] = DEFINE_RES_DMA(DMACH_AC97_PCMIN),
> - [3] = DEFINE_RES_DMA(DMACH_AC97_MICIN),
> - [4] = DEFINE_RES_IRQ(IRQ_AC97),
> + [1] = DEFINE_RES_IRQ(IRQ_AC97),
> };
>
> -static struct s3c_audio_pdata s3c_ac97_pdata;
> +static struct s3c_audio_pdata s3c_ac97_pdata = {
> + .dma_playback = DMACH_AC97_PCMOUT,
> + .dma_capture = DMACH_AC97_PCMIN,
> + .dma_capture_mic = DMACH_AC97_MICIN,
> +};
>
> static u64 s3c64xx_ac97_dmamask = DMA_BIT_MASK(32);
>
> diff --git a/arch/arm/mach-s3c64xx/include/mach/dma.h b/arch/arm/mach-s3c64xx/include/mach/dma.h
> index 096e14073bd9..7a277dc15274 100644
> --- a/arch/arm/mach-s3c64xx/include/mach/dma.h
> +++ b/arch/arm/mach-s3c64xx/include/mach/dma.h
> @@ -11,41 +11,39 @@
> #ifndef __ASM_ARCH_DMA_H
> #define __ASM_ARCH_DMA_H __FILE__
>
> -#define S3C64XX_DMA_CHAN(name) ((unsigned long)(name))
> -
> /* DMA0/SDMA0 */
> -#define DMACH_UART0 S3C64XX_DMA_CHAN("uart0_tx")
> -#define DMACH_UART0_SRC2 S3C64XX_DMA_CHAN("uart0_rx")
> -#define DMACH_UART1 S3C64XX_DMA_CHAN("uart1_tx")
> -#define DMACH_UART1_SRC2 S3C64XX_DMA_CHAN("uart1_rx")
> -#define DMACH_UART2 S3C64XX_DMA_CHAN("uart2_tx")
> -#define DMACH_UART2_SRC2 S3C64XX_DMA_CHAN("uart2_rx")
> -#define DMACH_UART3 S3C64XX_DMA_CHAN("uart3_tx")
> -#define DMACH_UART3_SRC2 S3C64XX_DMA_CHAN("uart3_rx")
> -#define DMACH_PCM0_TX S3C64XX_DMA_CHAN("pcm0_tx")
> -#define DMACH_PCM0_RX S3C64XX_DMA_CHAN("pcm0_rx")
> -#define DMACH_I2S0_OUT S3C64XX_DMA_CHAN("i2s0_tx")
> -#define DMACH_I2S0_IN S3C64XX_DMA_CHAN("i2s0_rx")
> -#define DMACH_SPI0_TX S3C64XX_DMA_CHAN("spi0_tx")
> -#define DMACH_SPI0_RX S3C64XX_DMA_CHAN("spi0_rx")
> -#define DMACH_HSI_I2SV40_TX S3C64XX_DMA_CHAN("i2s2_tx")
> -#define DMACH_HSI_I2SV40_RX S3C64XX_DMA_CHAN("i2s2_rx")
> +#define DMACH_UART0 "uart0_tx"
> +#define DMACH_UART0_SRC2 "uart0_rx"
> +#define DMACH_UART1 "uart1_tx"
> +#define DMACH_UART1_SRC2 "uart1_rx"
> +#define DMACH_UART2 "uart2_tx"
> +#define DMACH_UART2_SRC2 "uart2_rx"
> +#define DMACH_UART3 "uart3_tx"
> +#define DMACH_UART3_SRC2 "uart3_rx"
> +#define DMACH_PCM0_TX "pcm0_tx"
> +#define DMACH_PCM0_RX "pcm0_rx"
> +#define DMACH_I2S0_OUT "i2s0_tx"
> +#define DMACH_I2S0_IN "i2s0_rx"
> +#define DMACH_SPI0_TX "spi0_tx"
> +#define DMACH_SPI0_RX "spi0_rx"
> +#define DMACH_HSI_I2SV40_TX "i2s2_tx"
> +#define DMACH_HSI_I2SV40_RX "i2s2_rx"
>
> /* DMA1/SDMA1 */
> -#define DMACH_PCM1_TX S3C64XX_DMA_CHAN("pcm1_tx")
> -#define DMACH_PCM1_RX S3C64XX_DMA_CHAN("pcm1_rx")
> -#define DMACH_I2S1_OUT S3C64XX_DMA_CHAN("i2s1_tx")
> -#define DMACH_I2S1_IN S3C64XX_DMA_CHAN("i2s1_rx")
> -#define DMACH_SPI1_TX S3C64XX_DMA_CHAN("spi1_tx")
> -#define DMACH_SPI1_RX S3C64XX_DMA_CHAN("spi1_rx")
> -#define DMACH_AC97_PCMOUT S3C64XX_DMA_CHAN("ac97_out")
> -#define DMACH_AC97_PCMIN S3C64XX_DMA_CHAN("ac97_in")
> -#define DMACH_AC97_MICIN S3C64XX_DMA_CHAN("ac97_mic")
> -#define DMACH_PWM S3C64XX_DMA_CHAN("pwm")
> -#define DMACH_IRDA S3C64XX_DMA_CHAN("irda")
> -#define DMACH_EXTERNAL S3C64XX_DMA_CHAN("external")
> -#define DMACH_SECURITY_RX S3C64XX_DMA_CHAN("sec_rx")
> -#define DMACH_SECURITY_TX S3C64XX_DMA_CHAN("sec_tx")
> +#define DMACH_PCM1_TX "pcm1_tx"
> +#define DMACH_PCM1_RX "pcm1_rx"
> +#define DMACH_I2S1_OUT "i2s1_tx"
> +#define DMACH_I2S1_IN "i2s1_rx"
> +#define DMACH_SPI1_TX "spi1_tx"
> +#define DMACH_SPI1_RX "spi1_rx"
> +#define DMACH_AC97_PCMOUT "ac97_out"
> +#define DMACH_AC97_PCMIN "ac97_in"
> +#define DMACH_AC97_MICIN "ac97_mic"
> +#define DMACH_PWM "pwm"
> +#define DMACH_IRDA "irda"
> +#define DMACH_EXTERNAL "external"
> +#define DMACH_SECURITY_RX "sec_rx"
> +#define DMACH_SECURITY_TX "sec_tx"
>
> enum dma_ch {
> DMACH_MAX = 32
> diff --git a/arch/arm/plat-samsung/devs.c b/arch/arm/plat-samsung/devs.c
> index 771729b3f102..3ce234f4c872 100644
> --- a/arch/arm/plat-samsung/devs.c
> +++ b/arch/arm/plat-samsung/devs.c
> @@ -65,6 +65,7 @@
> #include <linux/platform_data/usb-ohci-s3c2410.h>
> #include <plat/usb-phy.h>
> #include <plat/regs-spi.h>
> +#include <linux/platform_data/asoc-s3c.h>
> #include <linux/platform_data/spi-s3c64xx.h>
>
> static u64 samsung_device_dma_mask = DMA_BIT_MASK(32);
> @@ -74,9 +75,12 @@ static u64 samsung_device_dma_mask = DMA_BIT_MASK(32);
> static struct resource s3c_ac97_resource[] = {
> [0] = DEFINE_RES_MEM(S3C2440_PA_AC97, S3C2440_SZ_AC97),
> [1] = DEFINE_RES_IRQ(IRQ_S3C244X_AC97),
> - [2] = DEFINE_RES_DMA_NAMED(DMACH_PCM_OUT, "PCM out"),
> - [3] = DEFINE_RES_DMA_NAMED(DMACH_PCM_IN, "PCM in"),
> - [4] = DEFINE_RES_DMA_NAMED(DMACH_MIC_IN, "Mic in"),
> +};
> +
> +static struct s3c_audio_pdata s3c_ac97_pdata = {
> + .dma_playback = (void *)DMACH_PCM_OUT,
> + .dma_capture = (void *)DMACH_PCM_IN,
> + .dma_capture_mic = (void *)DMACH_MIC_IN,
> };
>
> struct platform_device s3c_device_ac97 = {
> @@ -87,6 +91,7 @@ struct platform_device s3c_device_ac97 = {
> .dev = {
> .dma_mask = &samsung_device_dma_mask,
> .coherent_dma_mask = DMA_BIT_MASK(32),
> + .platform_data = &s3c_ac97_pdata,
> }
> };
> #endif /* CONFIG_CPU_S3C2440 */
> @@ -1088,8 +1093,8 @@ struct platform_device s3c_device_wdt = {
> #ifdef CONFIG_S3C64XX_DEV_SPI0
> static struct resource s3c64xx_spi0_resource[] = {
> [0] = DEFINE_RES_MEM(S3C_PA_SPI0, SZ_256),
> - [1] = DEFINE_RES_DMA(DMACH_SPI0_TX),
> - [2] = DEFINE_RES_DMA(DMACH_SPI0_RX),
> + [1] = DEFINE_RES_DMA((uintptr_t)DMACH_SPI0_TX),
> + [2] = DEFINE_RES_DMA((uintptr_t)DMACH_SPI0_RX),
> [3] = DEFINE_RES_IRQ(IRQ_SPI0),
> };
>
> @@ -1133,8 +1138,8 @@ void __init s3c64xx_spi0_set_platdata(int (*cfg_gpio)(void), int src_clk_nr,
> #ifdef CONFIG_S3C64XX_DEV_SPI1
> static struct resource s3c64xx_spi1_resource[] = {
> [0] = DEFINE_RES_MEM(S3C_PA_SPI1, SZ_256),
> - [1] = DEFINE_RES_DMA(DMACH_SPI1_TX),
> - [2] = DEFINE_RES_DMA(DMACH_SPI1_RX),
> + [1] = DEFINE_RES_DMA((uintptr_t)DMACH_SPI1_TX),
> + [2] = DEFINE_RES_DMA((uintptr_t)DMACH_SPI1_RX),
> [3] = DEFINE_RES_IRQ(IRQ_SPI1),
> };
>
> @@ -1176,8 +1181,8 @@ void __init s3c64xx_spi1_set_platdata(int (*cfg_gpio)(void), int src_clk_nr,
> #ifdef CONFIG_S3C64XX_DEV_SPI2
> static struct resource s3c64xx_spi2_resource[] = {
> [0] = DEFINE_RES_MEM(S3C_PA_SPI2, SZ_256),
> - [1] = DEFINE_RES_DMA(DMACH_SPI2_TX),
> - [2] = DEFINE_RES_DMA(DMACH_SPI2_RX),
> + [1] = DEFINE_RES_DMA((uintptr_t)DMACH_SPI2_TX),
> + [2] = DEFINE_RES_DMA((uintptr_t)DMACH_SPI2_RX),
> [3] = DEFINE_RES_IRQ(IRQ_SPI2),
> };
>
> diff --git a/include/linux/platform_data/asoc-s3c.h b/include/linux/platform_data/asoc-s3c.h
> index 5e0bc779e6c5..33f88b4479e4 100644
> --- a/include/linux/platform_data/asoc-s3c.h
> +++ b/include/linux/platform_data/asoc-s3c.h
> @@ -39,6 +39,10 @@ struct samsung_i2s {
> */
> struct s3c_audio_pdata {
> int (*cfg_gpio)(struct platform_device *);
> + void *dma_playback;
> + void *dma_capture;
> + void *dma_play_sec;
> + void *dma_capture_mic;
> union {
> struct samsung_i2s i2s;
> } type;
> diff --git a/sound/soc/samsung/ac97.c b/sound/soc/samsung/ac97.c
> index e4145509d63c..9c5219392460 100644
> --- a/sound/soc/samsung/ac97.c
> +++ b/sound/soc/samsung/ac97.c
> @@ -324,7 +324,7 @@ static const struct snd_soc_component_driver s3c_ac97_component = {
>
> static int s3c_ac97_probe(struct platform_device *pdev)
> {
> - struct resource *mem_res, *dmatx_res, *dmarx_res, *dmamic_res, *irq_res;
> + struct resource *mem_res, *irq_res;
> struct s3c_audio_pdata *ac97_pdata;
> int ret;
>
> @@ -335,24 +335,6 @@ static int s3c_ac97_probe(struct platform_device *pdev)
> }
>
> /* Check for availability of necessary resource */
> - dmatx_res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
> - if (!dmatx_res) {
> - dev_err(&pdev->dev, "Unable to get AC97-TX dma resource\n");
> - return -ENXIO;
> - }
> -
> - dmarx_res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
> - if (!dmarx_res) {
> - dev_err(&pdev->dev, "Unable to get AC97-RX dma resource\n");
> - return -ENXIO;
> - }
> -
> - dmamic_res = platform_get_resource(pdev, IORESOURCE_DMA, 2);
> - if (!dmamic_res) {
> - dev_err(&pdev->dev, "Unable to get AC97-MIC dma resource\n");
> - return -ENXIO;
> - }
> -
> irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
> if (!irq_res) {
> dev_err(&pdev->dev, "AC97 IRQ not provided!\n");
> @@ -364,11 +346,11 @@ static int s3c_ac97_probe(struct platform_device *pdev)
> if (IS_ERR(s3c_ac97.regs))
> return PTR_ERR(s3c_ac97.regs);
>
> - s3c_ac97_pcm_out.channel = dmatx_res->start;
> + s3c_ac97_pcm_out.slave = ac97_pdata->dma_playback;
> s3c_ac97_pcm_out.dma_addr = mem_res->start + S3C_AC97_PCM_DATA;
> - s3c_ac97_pcm_in.channel = dmarx_res->start;
> + s3c_ac97_pcm_in.slave = ac97_pdata->dma_capture;
> s3c_ac97_pcm_in.dma_addr = mem_res->start + S3C_AC97_PCM_DATA;
> - s3c_ac97_mic_in.channel = dmamic_res->start;
> + s3c_ac97_mic_in.slave = ac97_pdata->dma_capture_mic;
> s3c_ac97_mic_in.dma_addr = mem_res->start + S3C_AC97_MIC_DATA;
>
> init_completion(&s3c_ac97.done);
> diff --git a/sound/soc/samsung/dma.h b/sound/soc/samsung/dma.h
> index 0e85dcfec023..085ef30f5ca2 100644
> --- a/sound/soc/samsung/dma.h
> +++ b/sound/soc/samsung/dma.h
> @@ -15,7 +15,7 @@
> #include <sound/dmaengine_pcm.h>
>
> struct s3c_dma_params {
> - int channel; /* Channel ID */
> + void *slave; /* Channel ID */
> dma_addr_t dma_addr;
> int dma_size; /* Size of the DMA transfer */
> char *ch_name;
> diff --git a/sound/soc/samsung/dmaengine.c b/sound/soc/samsung/dmaengine.c
> index 506f5bf6d082..727008d57d14 100644
> --- a/sound/soc/samsung/dmaengine.c
> +++ b/sound/soc/samsung/dmaengine.c
> @@ -50,14 +50,14 @@ void samsung_asoc_init_dma_data(struct snd_soc_dai *dai,
>
> if (playback) {
> playback_data = &playback->dma_data;
> - playback_data->filter_data = (void *)playback->channel;
> + playback_data->filter_data = playback->slave;
> playback_data->chan_name = playback->ch_name;
> playback_data->addr = playback->dma_addr;
> playback_data->addr_width = playback->dma_size;
> }
> if (capture) {
> capture_data = &capture->dma_data;
> - capture_data->filter_data = (void *)capture->channel;
> + capture_data->filter_data = capture->slave;
> capture_data->chan_name = capture->ch_name;
> capture_data->addr = capture->dma_addr;
> capture_data->addr_width = capture->dma_size;
> diff --git a/sound/soc/samsung/i2s.c b/sound/soc/samsung/i2s.c
> index ea4ab374a223..0945b5de39e7 100644
> --- a/sound/soc/samsung/i2s.c
> +++ b/sound/soc/samsung/i2s.c
> @@ -1257,27 +1257,14 @@ static int samsung_i2s_probe(struct platform_device *pdev)
> pri_dai->lock = &pri_dai->spinlock;
>
> if (!np) {
> - res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
> - if (!res) {
> - dev_err(&pdev->dev,
> - "Unable to get I2S-TX dma resource\n");
> - return -ENXIO;
> - }
> - pri_dai->dma_playback.channel = res->start;
> -
> - res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
> - if (!res) {
> - dev_err(&pdev->dev,
> - "Unable to get I2S-RX dma resource\n");
> - return -ENXIO;
> - }
> - pri_dai->dma_capture.channel = res->start;
> -
> if (i2s_pdata == NULL) {
> dev_err(&pdev->dev, "Can't work without s3c_audio_pdata\n");
> return -EINVAL;
> }
>
> + pri_dai->dma_playback.slave = i2s_pdata->dma_playback;
> + pri_dai->dma_capture.slave = i2s_pdata->dma_capture;
> +
> if (&i2s_pdata->type)
> i2s_cfg = &i2s_pdata->type.i2s;
>
> @@ -1338,11 +1325,8 @@ static int samsung_i2s_probe(struct platform_device *pdev)
> sec_dai->dma_playback.dma_addr = regs_base + I2STXDS;
> sec_dai->dma_playback.ch_name = "tx-sec";
>
> - if (!np) {
> - res = platform_get_resource(pdev, IORESOURCE_DMA, 2);
> - if (res)
> - sec_dai->dma_playback.channel = res->start;
> - }
> + if (!np)
> + sec_dai->dma_playback.slave = i2s_pdata->dma_play_sec;

I cannot this resource in original patch nor setting the 'dma_play_sec'
part. I guess this does not really matter as newer platforms were
converted to DT so 'np' will be set, right?

>
> sec_dai->dma_playback.dma_size = 4;
> sec_dai->addr = pri_dai->addr;
> diff --git a/sound/soc/samsung/pcm.c b/sound/soc/samsung/pcm.c
> index b320a9d3fbf8..b5ee054dddc9 100644
> --- a/sound/soc/samsung/pcm.c
> +++ b/sound/soc/samsung/pcm.c
> @@ -486,7 +486,7 @@ static const struct snd_soc_component_driver s3c_pcm_component = {
> static int s3c_pcm_dev_probe(struct platform_device *pdev)
> {
> struct s3c_pcm_info *pcm;
> - struct resource *mem_res, *dmatx_res, *dmarx_res;
> + struct resource *mem_res;
> struct s3c_audio_pdata *pcm_pdata;
> int ret;
>
> @@ -499,18 +499,6 @@ static int s3c_pcm_dev_probe(struct platform_device *pdev)
> pcm_pdata = pdev->dev.platform_data;
>
> /* Check for availability of necessary resource */
> - dmatx_res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
> - if (!dmatx_res) {
> - dev_err(&pdev->dev, "Unable to get PCM-TX dma resource\n");
> - return -ENXIO;
> - }
> -
> - dmarx_res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
> - if (!dmarx_res) {
> - dev_err(&pdev->dev, "Unable to get PCM-RX dma resource\n");
> - return -ENXIO;
> - }
> -
> mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> if (!mem_res) {
> dev_err(&pdev->dev, "Unable to get register resource\n");
> @@ -568,8 +556,8 @@ static int s3c_pcm_dev_probe(struct platform_device *pdev)
> s3c_pcm_stereo_out[pdev->id].dma_addr = mem_res->start
> + S3C_PCM_TXFIFO;
>
> - s3c_pcm_stereo_in[pdev->id].channel = dmarx_res->start;
> - s3c_pcm_stereo_out[pdev->id].channel = dmatx_res->start;
> + s3c_pcm_stereo_in[pdev->id].slave = pcm_pdata->dma_capture;
> + s3c_pcm_stereo_out[pdev->id].slave = pcm_pdata->dma_playback;
>
> pcm->dma_capture = &s3c_pcm_stereo_in[pdev->id];
> pcm->dma_playback = &s3c_pcm_stereo_out[pdev->id];
> diff --git a/sound/soc/samsung/s3c2412-i2s.c b/sound/soc/samsung/s3c2412-i2s.c
> index 2b766d212ce0..77d27c85a32a 100644
> --- a/sound/soc/samsung/s3c2412-i2s.c
> +++ b/sound/soc/samsung/s3c2412-i2s.c
> @@ -34,13 +34,13 @@
> #include "s3c2412-i2s.h"
>
> static struct s3c_dma_params s3c2412_i2s_pcm_stereo_out = {
> - .channel = DMACH_I2S_OUT,
> + .slave = (void *)(uintptr_t)DMACH_I2S_OUT,
> .ch_name = "tx",
> .dma_size = 4,
> };
>
> static struct s3c_dma_params s3c2412_i2s_pcm_stereo_in = {
> - .channel = DMACH_I2S_IN,
> + .slave = (void *)(uintptr_t)DMACH_I2S_IN,
> .ch_name = "rx",
> .dma_size = 4,
> };
> diff --git a/sound/soc/samsung/s3c24xx-i2s.c b/sound/soc/samsung/s3c24xx-i2s.c
> index 5bf723689692..9da3a77ea2c7 100644
> --- a/sound/soc/samsung/s3c24xx-i2s.c
> +++ b/sound/soc/samsung/s3c24xx-i2s.c
> @@ -32,13 +32,13 @@
> #include "s3c24xx-i2s.h"
>
> static struct s3c_dma_params s3c24xx_i2s_pcm_stereo_out = {
> - .channel = DMACH_I2S_OUT,
> + .slave = (void *)(uintptr_t)DMACH_I2S_OUT,
> .ch_name = "tx",
> .dma_size = 2,
> };
>
> static struct s3c_dma_params s3c24xx_i2s_pcm_stereo_in = {
> - .channel = DMACH_I2S_IN,
> + .slave = (void *)(uintptr_t)DMACH_I2S_IN,
> .ch_name = "rx",
> .dma_size = 2,
> };
> diff --git a/sound/soc/samsung/spdif.c b/sound/soc/samsung/spdif.c
> index 36dbc0e96004..087d49d1787c 100644
> --- a/sound/soc/samsung/spdif.c
> +++ b/sound/soc/samsung/spdif.c
> @@ -359,7 +359,7 @@ static const struct snd_soc_component_driver samsung_spdif_component = {
> static int spdif_probe(struct platform_device *pdev)
> {
> struct s3c_audio_pdata *spdif_pdata;
> - struct resource *mem_res, *dma_res;
> + struct resource *mem_res;
> struct samsung_spdif_info *spdif;
> int ret;
>
> @@ -367,12 +367,6 @@ static int spdif_probe(struct platform_device *pdev)
>
> dev_dbg(&pdev->dev, "Entered %s\n", __func__);
>
> - dma_res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
> - if (!dma_res) {
> - dev_err(&pdev->dev, "Unable to get dma resource.\n");
> - return -ENXIO;
> - }
> -
> mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> if (!mem_res) {
> dev_err(&pdev->dev, "Unable to get register resource.\n");
> @@ -432,7 +426,7 @@ static int spdif_probe(struct platform_device *pdev)
>
> spdif_stereo_out.dma_size = 2;
> spdif_stereo_out.dma_addr = mem_res->start + DATA_OUTBUF;
> - spdif_stereo_out.channel = dma_res->start;
> + spdif_stereo_out.slave = spdif_pdata->dma_playback;
>
> spdif->dma_playback = &spdif_stereo_out;

No one sets ioresources and pdata for spdif device. No in-kernel board
files for it?

Best regards,
Krzysztof
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