From b81f8df8039e6dca8f9533fe0b549139b907e61f Mon Sep 17 00:00:00 2001 From: Michael Sit Wei Hong Date: Thu, 30 Jul 2020 13:53:16 +0800 Subject: [PATCH 1/2] ASoC: Intel: KMB: Add 8kHz audio support Enable 8kHz audio support for Intel Keem Bay platform. Signed-off-by: Michael Sit Wei Hong Reviewed-by: Sia Jee Heng Reviewed-by: Pierre-Louis Bossart Link: https://lore.kernel.org/r/20200730055319.1522-2-michael.wei.hong.sit@intel.com Signed-off-by: Mark Brown --- sound/soc/intel/keembay/kmb_platform.c | 22 ++++++++++++++++------ 1 file changed, 16 insertions(+), 6 deletions(-) diff --git a/sound/soc/intel/keembay/kmb_platform.c b/sound/soc/intel/keembay/kmb_platform.c index 44798832c2f9..dcc5ac561545 100644 --- a/sound/soc/intel/keembay/kmb_platform.c +++ b/sound/soc/intel/keembay/kmb_platform.c @@ -28,8 +28,10 @@ static const struct snd_pcm_hardware kmb_pcm_hardware = { SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_BATCH | SNDRV_PCM_INFO_BLOCK_TRANSFER, - .rates = SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_48000, - .rate_min = 16000, + .rates = SNDRV_PCM_RATE_8000 | + SNDRV_PCM_RATE_16000 | + SNDRV_PCM_RATE_48000, + .rate_min = 8000, .rate_max = 48000, .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE | @@ -533,8 +535,10 @@ static struct snd_soc_dai_driver intel_kmb_platform_dai[] = { .playback = { .channels_min = 2, .channels_max = 2, - .rates = SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_48000, - .rate_min = 16000, + .rates = SNDRV_PCM_RATE_8000 | + SNDRV_PCM_RATE_16000 | + SNDRV_PCM_RATE_48000, + .rate_min = 8000, .rate_max = 48000, .formats = (SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S24_LE | @@ -543,8 +547,14 @@ static struct snd_soc_dai_driver intel_kmb_platform_dai[] = { .capture = { .channels_min = 2, .channels_max = 2, - .rates = SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_48000, - .rate_min = 16000, + /* + * .channels_max will be overwritten + * if provided by Device Tree + */ + .rates = SNDRV_PCM_RATE_8000 | + SNDRV_PCM_RATE_16000 | + SNDRV_PCM_RATE_48000, + .rate_min = 8000, .rate_max = 48000, .formats = (SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S24_LE | From d13389849caf05d79141d317bdf2f6b318e65f87 Mon Sep 17 00:00:00 2001 From: Michael Sit Wei Hong Date: Thu, 30 Jul 2020 13:53:17 +0800 Subject: [PATCH 2/2] ASoC: Intel: KMB: Rework disable channel function All channels are enabled at boot up, this patch ensures that all channels are disabled at boot and whenever the function is called. Signed-off-by: Michael Sit Wei Hong Reviewed-by: Sia Jee Heng Reviewed-by: Pierre-Louis Bossart Link: https://lore.kernel.org/r/20200730055319.1522-3-michael.wei.hong.sit@intel.com Signed-off-by: Mark Brown --- sound/soc/intel/keembay/kmb_platform.c | 10 +++++++--- sound/soc/intel/keembay/kmb_platform.h | 1 + 2 files changed, 8 insertions(+), 3 deletions(-) diff --git a/sound/soc/intel/keembay/kmb_platform.c b/sound/soc/intel/keembay/kmb_platform.c index dcc5ac561545..16f9fc4c663d 100644 --- a/sound/soc/intel/keembay/kmb_platform.c +++ b/sound/soc/intel/keembay/kmb_platform.c @@ -109,14 +109,14 @@ static unsigned int kmb_pcm_rx_fn(struct kmb_i2s_info *kmb_i2s, static inline void kmb_i2s_disable_channels(struct kmb_i2s_info *kmb_i2s, u32 stream) { - struct i2s_clk_config_data *config = &kmb_i2s->config; u32 i; + /* Disable all channels regardless of configuration*/ if (stream == SNDRV_PCM_STREAM_PLAYBACK) { - for (i = 0; i < config->chan_nr / 2; i++) + for (i = 0; i < MAX_ISR; i++) writel(0, kmb_i2s->i2s_base + TER(i)); } else { - for (i = 0; i < config->chan_nr / 2; i++) + for (i = 0; i < MAX_ISR; i++) writel(0, kmb_i2s->i2s_base + RER(i)); } } @@ -637,6 +637,10 @@ static int kmb_plat_dai_probe(struct platform_device *pdev) return ret; } + /* To ensure none of the channels are enabled at boot up */ + kmb_i2s_disable_channels(kmb_i2s, SNDRV_PCM_STREAM_PLAYBACK); + kmb_i2s_disable_channels(kmb_i2s, SNDRV_PCM_STREAM_CAPTURE); + dev_set_drvdata(dev, kmb_i2s); return ret; diff --git a/sound/soc/intel/keembay/kmb_platform.h b/sound/soc/intel/keembay/kmb_platform.h index 6bf221aa8fff..9756b132c12f 100644 --- a/sound/soc/intel/keembay/kmb_platform.h +++ b/sound/soc/intel/keembay/kmb_platform.h @@ -90,6 +90,7 @@ #define MAX_CHANNEL_NUM 8 #define MIN_CHANNEL_NUM 2 +#define MAX_ISR 4 #define TWO_CHANNEL_SUPPORT 2 /* up to 2.0 */ #define FOUR_CHANNEL_SUPPORT 4 /* up to 3.1 */