On Thu, Apr 28, 2011 2:01 PM, Jassi Brar jassisinghbrar@gmail.com wrote:
Subject: Re: [alsa-devel] [PATCH V2] ASoC: SAMSUNG: Add quirk to support Exynos4 PCM audio
On Thu, Apr 28, 2011 at 6:53 AM, Sangbeom Kim sbkim73@samsung.com wrote:
Exynos4 pcm block is different from previous one. Unlike previous one, Exynos4 doesn't have SCLK divider in the pcm block. For this reason, This patch added quirk handling for Exynos4 pcm cpu
driver.
Signed-off-by: Sangbeom Kim sbkim73@samsung.com
sound/soc/samsung/pcm.c | 46 +++++++++++++++++++++++++++++-----------
1 files changed, 29 insertions(+), 17 deletions(-)
diff --git a/sound/soc/samsung/pcm.c b/sound/soc/samsung/pcm.c index 9c7e8b4..adfb251 100644 --- a/sound/soc/samsung/pcm.c +++ b/sound/soc/samsung/pcm.c @@ -10,7 +10,6 @@
- it under the terms of the GNU General Public License version 2 as
- published by the Free Software Foundation.
*/
#include <linux/clk.h> #include <linux/io.h>
@@ -128,6 +127,7 @@ struct s3c_pcm_info {
struct s3c_dma_params *dma_playback; struct s3c_dma_params *dma_capture;
u32 quirks;};
static struct s3c2410_dma_client s3c_pcm_dma_client_out = { @@ -278,7 +278,7 @@ static int s3c_pcm_hw_params(struct
snd_pcm_substream *substream,
struct clk *clk; int sclk_div, sync_div; unsigned long flags;
u32 clkctl;
u32 clkctl = 0; dev_dbg(pcm->dev, "Entered %s\n", __func__);@@ -299,25 +299,34 @@ static int s3c_pcm_hw_params(struct
snd_pcm_substream *substream,
spin_lock_irqsave(&pcm->lock, flags);
/* Get hold of the PCMSOURCE_CLK */clkctl = readl(regs + S3C_PCM_CLKCTL);if (clkctl & S3C_PCM_CLKCTL_SERCLKSEL_PCLK)clk = pcm->pclk;else
if (pcm->quirks == QUIRK_NO_DIV) { clk = pcm->cclk;if (clk_get_rate(clk) != (pcm-sclk_per_fs*params_rate(params))) {
clk_set_rate(clk, pcm-sclk_per_fs*params_rate(params));
}sync_div = clk_get_rate(clk)/(params_rate(params))-1;}else {/* Get hold of the PCMSOURCE_CLK */clkctl = readl(regs + S3C_PCM_CLKCTL);if (clkctl & S3C_PCM_CLKCTL_SERCLKSEL_PCLK)clk = pcm->pclk;elseclk = pcm->cclk;
/* Set the SCLK divider */sclk_div = clk_get_rate(clk) / pcm->sclk_per_fs /params_rate(params) / 2 - 1;
/* Set the SCLK divider */sclk_div = clk_get_rate(clk) / pcm->sclk_per_fs /params_rate(params) / 2 - 1;
clkctl &= ~(S3C_PCM_CLKCTL_SCLKDIV_MASK<< S3C_PCM_CLKCTL_SCLKDIV_SHIFT);clkctl |= ((sclk_div & S3C_PCM_CLKCTL_SCLKDIV_MASK)<< S3C_PCM_CLKCTL_SCLKDIV_SHIFT);
clkctl &= ~(S3C_PCM_CLKCTL_SCLKDIV_MASK<< S3C_PCM_CLKCTL_SCLKDIV_SHIFT);clkctl |= ((sclk_div & S3C_PCM_CLKCTL_SCLKDIV_MASK)<< S3C_PCM_CLKCTL_SCLKDIV_SHIFT);
/* Set the SYNC divider */sync_div = pcm->sclk_per_fs - 1;
sync_div = pcm->sclk_per_fs - 1;}/* Set the SYNC divider */ clkctl &= ~(S3C_PCM_CLKCTL_SYNCDIV_MASK << S3C_PCM_CLKCTL_SYNCDIV_SHIFT); clkctl |= ((sync_div & S3C_PCM_CLKCTL_SYNCDIV_MASK)@@ -330,7 +339,6 @@ static int s3c_pcm_hw_params(struct
snd_pcm_substream *substream,
dev_dbg(pcm->dev, "PCMSOURCE_CLK-%lu SCLK=%ufs SCLK_DIV=%dSYNC_DIV=%d\n",
clk_get_rate(clk), pcm->sclk_per_fs, sclk_div, sync_div);
return 0;}
@@ -494,6 +502,7 @@ static __devinit int s3c_pcm_dev_probe(struct
platform_device *pdev)
struct s3c_pcm_info *pcm; struct resource *mem_res, *dmatx_res, *dmarx_res; struct s3c_audio_pdata *pcm_pdata;
struct samsung_i2s *pcm_cfg;Oh dear, perhaps you forgot to test before sending ?
I did test and PCM working is fine on SMDKV310 and SMDKV210. But It was my mistake. samsung_i2s was used unintentionally. I will resubmit it. Thanks,
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