4 files changed, 158 insertions, 108 deletions

diff --git a/include/sound/tlv320dac33-plat.h b/include/sound/tlv320dac33-plat.h
index 3f428d53195..6c664965679 100644
--- a/include/sound/tlv320dac33-plat.h
+++ b/include/sound/tlv320dac33-plat.h
@@ -15,6 +15,8 @@
 
 struct tlv320dac33_platform_data {
         int power_gpio;
+        int mode1_latency; /* latency caused by the i2c writes in us */
+        int auto_fifo_config; /* FIFO config based on the period size */
         int keep_bclk;  /* Keep the BCLK running in FIFO modes */
         u8 burst_bclkdiv;
 };
diff --git a/sound/soc/codecs/tlv320dac33.c b/sound/soc/codecs/tlv320dac33.c
index 2fa946ce23a..8651b01ed22 100644
--- a/sound/soc/codecs/tlv320dac33.c
+++ b/sound/soc/codecs/tlv320dac33.c
@@ -49,8 +49,6 @@
 
 #define NSAMPLE_MAX             5700
 
-#define LATENCY_TIME_MS         20
-
 #define MODE7_LTHR              10
 #define MODE7_UTHR              (DAC33_BUFFER_SIZE_SAMPLES - 10)
 
@@ -62,6 +60,9 @@
 #define US_TO_SAMPLES(rate, us) \
         (rate / (1000000 / us))
 
+#define UTHR_FROM_PERIOD_SIZE(samples, playrate, burstrate) \
+        ((samples * 5000) / ((burstrate * 5000) / (burstrate - playrate)))
+
 static void dac33_calculate_times(struct snd_pcm_substream *substream);
 static int dac33_prepare_chip(struct snd_pcm_substream *substream);
 
@@ -107,6 +108,10 @@ struct tlv320dac33_priv {
                                          * this */
         enum dac33_fifo_modes fifo_mode;/* FIFO mode selection */
         unsigned int nsample;           /* burst read amount from host */
+        int mode1_latency;              /* latency caused by the i2c writes in
+                                         * us */
+        int auto_fifo_config;           /* Configure the FIFO based on the
+                                         * period size */
         u8 burst_bclkdiv;               /* BCLK divider value in burst mode */
         unsigned int burst_rate;        /* Interface speed in Burst modes */
 
@@ -538,13 +543,16 @@ static const struct snd_kcontrol_new dac33_snd_controls[] = {
                  DAC33_LINEL_TO_LLO_VOL, DAC33_LINER_TO_RLO_VOL, 0, 127, 1),
 };
 
-static const struct snd_kcontrol_new dac33_nsample_snd_controls[] = {
+static const struct snd_kcontrol_new dac33_mode_snd_controls[] = {
+        SOC_ENUM_EXT("FIFO Mode", dac33_fifo_mode_enum,
+                 dac33_get_fifo_mode, dac33_set_fifo_mode),
+};
+
+static const struct snd_kcontrol_new dac33_fifo_snd_controls[] = {
         SOC_SINGLE_EXT("nSample", 0, 0, 5900, 0,
-                 dac33_get_nsample, dac33_set_nsample),
+                dac33_get_nsample, dac33_set_nsample),
         SOC_SINGLE_EXT("UTHR", 0, 0, MODE7_UTHR, 0,
                  dac33_get_uthr, dac33_set_uthr),
-        SOC_ENUM_EXT("FIFO Mode", dac33_fifo_mode_enum,
-                 dac33_get_fifo_mode, dac33_set_fifo_mode),
 };
 
 /* Analog bypass */
@@ -649,7 +657,7 @@ static inline void dac33_prefill_handler(struct tlv320dac33_priv *dac33)
         switch (dac33->fifo_mode) {
         case DAC33_FIFO_MODE1:
                 dac33_write16(codec, DAC33_NSAMPLE_MSB,
-                        DAC33_THRREG(dac33->nsample + dac33->alarm_threshold));
+                        DAC33_THRREG(dac33->nsample));
 
                 /* Take the timestamps */
                 spin_lock_irq(&dac33->lock);
@@ -798,6 +806,10 @@ static void dac33_shutdown(struct snd_pcm_substream *substream,
         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
 
         dac33->substream = NULL;
+
+        /* Reset the nSample restrictions */
+        dac33->nsample_min = 0;
+        dac33->nsample_max = NSAMPLE_MAX;
 }
 
 static int dac33_hw_params(struct snd_pcm_substream *substream,
@@ -1040,54 +1052,68 @@ static void dac33_calculate_times(struct snd_pcm_substream *substream)
         struct snd_soc_device *socdev = rtd->socdev;
         struct snd_soc_codec *codec = socdev->card->codec;
         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
+        unsigned int period_size = substream->runtime->period_size;
+        unsigned int rate = substream->runtime->rate;
         unsigned int nsample_limit;
 
         /* In bypass mode we don't need to calculate */
         if (!dac33->fifo_mode)
                 return;
 
-        /* Number of samples (16bit, stereo) in one period */
-        dac33->nsample_min = snd_pcm_lib_period_bytes(substream) / 4;
-
-        /* Number of samples (16bit, stereo) in ALSA buffer */
-        dac33->nsample_max = snd_pcm_lib_buffer_bytes(substream) / 4;
-        /* Subtract one period from the total */
-        dac33->nsample_max -= dac33->nsample_min;
-
-        /* Number of samples for LATENCY_TIME_MS / 2 */
-        dac33->alarm_threshold = substream->runtime->rate /
-                                 (1000 / (LATENCY_TIME_MS / 2));
-
-        /* Find and fix up the lowest nsmaple limit */
-        nsample_limit = substream->runtime->rate / (1000 / LATENCY_TIME_MS);
-
-        if (dac33->nsample_min < nsample_limit)
-                dac33->nsample_min = nsample_limit;
-
-        if (dac33->nsample < dac33->nsample_min)
-                dac33->nsample = dac33->nsample_min;
-
-        /*
-         * Find and fix up the highest nsmaple limit
-         * In order to not overflow the DAC33 buffer substract the
-         * alarm_threshold value from the size of the DAC33 buffer
-         */
-        nsample_limit = DAC33_BUFFER_SIZE_SAMPLES - dac33->alarm_threshold;
-
-        if (dac33->nsample_max > nsample_limit)
-                dac33->nsample_max = nsample_limit;
-
-        if (dac33->nsample > dac33->nsample_max)
-                dac33->nsample = dac33->nsample_max;
-
         switch (dac33->fifo_mode) {
         case DAC33_FIFO_MODE1:
+                /* Number of samples under i2c latency */
+                dac33->alarm_threshold = US_TO_SAMPLES(rate,
+                                                dac33->mode1_latency);
+                if (dac33->auto_fifo_config) {
+                        if (period_size <= dac33->alarm_threshold)
+                                /*
+                                 * Configure nSamaple to number of periods,
+                                 * which covers the latency requironment.
+                                 */
+                                dac33->nsample = period_size *
+                                       ((dac33->alarm_threshold / period_size) +
+                                       (dac33->alarm_threshold % period_size ?
+                                       1 : 0));
+                        else
+                                dac33->nsample = period_size;
+                } else {
+                        /* nSample time shall not be shorter than i2c latency */
+                        dac33->nsample_min = dac33->alarm_threshold;
+                        /*
+                         * nSample should not be bigger than alsa buffer minus
+                         * size of one period to avoid overruns
+                         */
+                        dac33->nsample_max = substream->runtime->buffer_size -
+                                                period_size;
+                        nsample_limit = DAC33_BUFFER_SIZE_SAMPLES -
+                                        dac33->alarm_threshold;
+                        if (dac33->nsample_max > nsample_limit)
+                                dac33->nsample_max = nsample_limit;
+
+                        /* Correct the nSample if it is outside of the ranges */
+                        if (dac33->nsample < dac33->nsample_min)
+                                dac33->nsample = dac33->nsample_min;
+                        if (dac33->nsample > dac33->nsample_max)
+                                dac33->nsample = dac33->nsample_max;
+                }
+
                 dac33->mode1_us_burst = SAMPLES_TO_US(dac33->burst_rate,
                                                       dac33->nsample);
                 dac33->t_stamp1 = 0;
                 dac33->t_stamp2 = 0;
                 break;
         case DAC33_FIFO_MODE7:
+                if (dac33->auto_fifo_config) {
+                        dac33->uthr = UTHR_FROM_PERIOD_SIZE(
+                                        period_size,
+                                        rate,
+                                        dac33->burst_rate) + 9;
+                        if (dac33->uthr > MODE7_UTHR)
+                                dac33->uthr = MODE7_UTHR;
+                        if (dac33->uthr < (MODE7_LTHR + 10))
+                                dac33->uthr = (MODE7_LTHR + 10);
+                }
                 dac33->mode7_us_to_lthr =
                                 SAMPLES_TO_US(substream->runtime->rate,
                                         dac33->uthr - MODE7_LTHR + 1);
@@ -1385,10 +1411,15 @@ static int dac33_soc_probe(struct platform_device *pdev)
 
         snd_soc_add_controls(codec, dac33_snd_controls,
                              ARRAY_SIZE(dac33_snd_controls));
-        /* Only add the nSample controls, if we have valid IRQ number */
-        if (dac33->irq >= 0)
-                snd_soc_add_controls(codec, dac33_nsample_snd_controls,
-                                     ARRAY_SIZE(dac33_nsample_snd_controls));
+        /* Only add the FIFO controls, if we have valid IRQ number */
+        if (dac33->irq >= 0) {
+                snd_soc_add_controls(codec, dac33_mode_snd_controls,
+                                     ARRAY_SIZE(dac33_mode_snd_controls));
+                /* FIFO usage controls only, if autoio config is not selected */
+                if (!dac33->auto_fifo_config)
+                        snd_soc_add_controls(codec, dac33_fifo_snd_controls,
+                                        ARRAY_SIZE(dac33_fifo_snd_controls));
+        }
 
         dac33_add_widgets(codec);
 
@@ -1519,6 +1550,10 @@ static int __devinit dac33_i2c_probe(struct i2c_client *client,
         /* Pre calculate the burst rate */
         dac33->burst_rate = BURST_BASEFREQ_HZ / dac33->burst_bclkdiv / 32;
         dac33->keep_bclk = pdata->keep_bclk;
+        dac33->auto_fifo_config = pdata->auto_fifo_config;
+        dac33->mode1_latency = pdata->mode1_latency;
+        if (!dac33->mode1_latency)
+                dac33->mode1_latency = 10000; /* 10ms */
         dac33->irq = client->irq;
         dac33->nsample = NSAMPLE_MAX;
         dac33->nsample_max = NSAMPLE_MAX;
diff --git a/sound/soc/codecs/twl4030.c b/sound/soc/codecs/twl4030.c
index bd557c2bcb8..d401c597d38 100644
--- a/sound/soc/codecs/twl4030.c
+++ b/sound/soc/codecs/twl4030.c
@@ -1432,11 +1432,9 @@ static const struct snd_soc_dapm_widget twl4030_dapm_widgets[] = {
            TX2 Left/Right: either analog Left/Right or Digimic1 */
         SND_SOC_DAPM_MUX_E("TX1 Capture Route", SND_SOC_NOPM, 0, 0,
                 &twl4030_dapm_micpathtx1_control, micpath_event,
-                SND_SOC_DAPM_POST_PMU|SND_SOC_DAPM_POST_PMD|
                 SND_SOC_DAPM_POST_REG),
         SND_SOC_DAPM_MUX_E("TX2 Capture Route", SND_SOC_NOPM, 0, 0,
                 &twl4030_dapm_micpathtx2_control, micpath_event,
-                SND_SOC_DAPM_POST_PMU|SND_SOC_DAPM_POST_PMD|
                 SND_SOC_DAPM_POST_REG),
 
         /* Analog input mixers for the capture amplifiers */
diff --git a/sound/soc/omap/omap-mcbsp.c b/sound/soc/omap/omap-mcbsp.c
index aebd3af2ab7..86f213905e2 100644
--- a/sound/soc/omap/omap-mcbsp.c
+++ b/sound/soc/omap/omap-mcbsp.c
@@ -155,13 +155,23 @@ static void omap_mcbsp_set_threshold(struct snd_pcm_substream *substream)
         struct snd_soc_pcm_runtime *rtd = substream->private_data;
         struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
         struct omap_mcbsp_data *mcbsp_data = to_mcbsp(cpu_dai->private_data);
+        struct omap_pcm_dma_data *dma_data;
         int dma_op_mode = omap_mcbsp_get_dma_op_mode(mcbsp_data->bus_id);
         int words;
 
+        dma_data = snd_soc_dai_get_dma_data(rtd->dai->cpu_dai, substream);
+
         /* TODO: Currently, MODE_ELEMENT == MODE_FRAME */
         if (dma_op_mode == MCBSP_DMA_MODE_THRESHOLD)
-                /* The FIFO size depends on the McBSP word configuration */
-                words = snd_pcm_lib_period_bytes(substream) /
+                /*
+                 * Configure McBSP threshold based on either:
+                 * packet_size, when the sDMA is in packet mode, or
+                 * based on the period size.
+                 */
+                if (dma_data->packet_size)
+                        words = dma_data->packet_size;
+                else
+                        words = snd_pcm_lib_period_bytes(substream) /
                                                         (mcbsp_data->wlen / 8);
         else
                 words = 1;
@@ -192,31 +202,6 @@ static int omap_mcbsp_hwrule_min_buffersize(struct snd_pcm_hw_params *params,
         return snd_interval_refine(buffer_size, &frames);
 }
 
-static int omap_mcbsp_hwrule_max_periodsize(struct snd_pcm_hw_params *params,
-                                    struct snd_pcm_hw_rule *rule)
-{
-        struct snd_interval *period_size = hw_param_interval(params,
-                                        SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
-        struct snd_interval *channels = hw_param_interval(params,
-                                        SNDRV_PCM_HW_PARAM_CHANNELS);
-        struct snd_pcm_substream *substream = rule->private;
-        struct snd_soc_pcm_runtime *rtd = substream->private_data;
-        struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
-        struct omap_mcbsp_data *mcbsp_data = to_mcbsp(cpu_dai->private_data);
-        struct snd_interval frames;
-        int size;
-
-        snd_interval_any(&frames);
-        if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
-                size = omap_mcbsp_get_max_tx_threshold(mcbsp_data->bus_id);
-        else
-                size = omap_mcbsp_get_max_rx_threshold(mcbsp_data->bus_id);
-
-        frames.max = size / channels->min;
-        frames.integer = 1;
-        return snd_interval_refine(period_size, &frames);
-}
-
 static int omap_mcbsp_dai_startup(struct snd_pcm_substream *substream,
                                   struct snd_soc_dai *dai)
 {
@@ -245,10 +230,8 @@ static int omap_mcbsp_dai_startup(struct snd_pcm_substream *substream,
          * 4 channels: size is 128 / 4 = 32 frames (4 * 32 words)
          */
         if (cpu_is_omap343x()) {
-                int dma_op_mode = omap_mcbsp_get_dma_op_mode(bus_id);
-
                 /*
-                * The first rule is for the buffer size, we should not allow
+                * Rule for the buffer size. We should not allow
                 * smaller buffer than the FIFO size to avoid underruns
                 */
                 snd_pcm_hw_rule_add(substream->runtime, 0,
@@ -257,17 +240,9 @@ static int omap_mcbsp_dai_startup(struct snd_pcm_substream *substream,
                                     mcbsp_data,
                                     SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
 
-                /*
-                 * In case of threshold mode, the rule will ensure, that the
-                 * period size is not bigger than the maximum allowed threshold
-                 * value.
-                 */
-                if (dma_op_mode == MCBSP_DMA_MODE_THRESHOLD)
-                        snd_pcm_hw_rule_add(substream->runtime, 0,
-                                            SNDRV_PCM_HW_PARAM_CHANNELS,
-                                            omap_mcbsp_hwrule_max_periodsize,
-                                            substream,
-                                            SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
+                /* Make sure, that the period size is always even */
+                snd_pcm_hw_constraint_step(substream->runtime, 0,
+                                           SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 2);
         }
 
         return err;
@@ -348,11 +323,14 @@ static int omap_mcbsp_dai_hw_params(struct snd_pcm_substream *substream,
         struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
         struct omap_mcbsp_data *mcbsp_data = to_mcbsp(cpu_dai->private_data);
         struct omap_mcbsp_reg_cfg *regs = &mcbsp_data->regs;
-        int dma, bus_id = mcbsp_data->bus_id, id = cpu_dai->id;
+        struct omap_pcm_dma_data *dma_data;
+        int dma, bus_id = mcbsp_data->bus_id;
         int wlen, channels, wpf, sync_mode = OMAP_DMA_SYNC_ELEMENT;
+        int pkt_size = 0;
         unsigned long port;
         unsigned int format, div, framesize, master;
 
+        dma_data = &omap_mcbsp_dai_dma_params[cpu_dai->id][substream->stream];
         if (cpu_class_is_omap1()) {
                 dma = omap1_dma_reqs[bus_id][substream->stream];
                 port = omap1_mcbsp_port[bus_id][substream->stream];
@@ -365,35 +343,74 @@ static int omap_mcbsp_dai_hw_params(struct snd_pcm_substream *substream,
         } else if (cpu_is_omap343x()) {
                 dma = omap24xx_dma_reqs[bus_id][substream->stream];
                 port = omap34xx_mcbsp_port[bus_id][substream->stream];
-                omap_mcbsp_dai_dma_params[id][substream->stream].set_threshold =
-                                                omap_mcbsp_set_threshold;
-                /* TODO: Currently, MODE_ELEMENT == MODE_FRAME */
-                if (omap_mcbsp_get_dma_op_mode(bus_id) ==
-                                                MCBSP_DMA_MODE_THRESHOLD)
-                        sync_mode = OMAP_DMA_SYNC_FRAME;
         } else {
                 return -ENODEV;
         }
-        omap_mcbsp_dai_dma_params[id][substream->stream].name =
-                substream->stream ? "Audio Capture" : "Audio Playback";
-        omap_mcbsp_dai_dma_params[id][substream->stream].dma_req = dma;
-        omap_mcbsp_dai_dma_params[id][substream->stream].port_addr = port;
-        omap_mcbsp_dai_dma_params[id][substream->stream].sync_mode = sync_mode;
         switch (params_format(params)) {
         case SNDRV_PCM_FORMAT_S16_LE:
-                omap_mcbsp_dai_dma_params[id][substream->stream].data_type =
-                         OMAP_DMA_DATA_TYPE_S16;
+                dma_data->data_type = OMAP_DMA_DATA_TYPE_S16;
+                wlen = 16;
                 break;
         case SNDRV_PCM_FORMAT_S32_LE:
-                omap_mcbsp_dai_dma_params[id][substream->stream].data_type =
-                         OMAP_DMA_DATA_TYPE_S32;
+                dma_data->data_type = OMAP_DMA_DATA_TYPE_S32;
+                wlen = 32;
                 break;
         default:
                 return -EINVAL;
         }
+        if (cpu_is_omap343x()) {
+                dma_data->set_threshold = omap_mcbsp_set_threshold;
+                /* TODO: Currently, MODE_ELEMENT == MODE_FRAME */
+                if (omap_mcbsp_get_dma_op_mode(bus_id) ==
+                                                MCBSP_DMA_MODE_THRESHOLD) {
+                        int period_words, max_thrsh;
+
+                        period_words = params_period_bytes(params) / (wlen / 8);
+                        if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+                                max_thrsh = omap_mcbsp_get_max_tx_threshold(
+                                                            mcbsp_data->bus_id);
+                        else
+                                max_thrsh = omap_mcbsp_get_max_rx_threshold(
+                                                            mcbsp_data->bus_id);
+                        /*
+                         * If the period contains less or equal number of words,
+                         * we are using the original threshold mode setup:
+                         * McBSP threshold = sDMA frame size = period_size
+                         * Otherwise we switch to sDMA packet mode:
+                         * McBSP threshold = sDMA packet size
+                         * sDMA frame size = period size
+                         */
+                        if (period_words > max_thrsh) {
+                                int divider = 0;
+
+                                /*
+                                 * Look for the biggest threshold value, which
+                                 * divides the period size evenly.
+                                 */
+                                divider = period_words / max_thrsh;
+                                if (period_words % max_thrsh)
+                                        divider++;
+                                while (period_words % divider &&
+                                        divider < period_words)
+                                        divider++;
+                                if (divider == period_words)
+                                        return -EINVAL;
+
+                                pkt_size = period_words / divider;
+                                sync_mode = OMAP_DMA_SYNC_PACKET;
+                        } else {
+                                sync_mode = OMAP_DMA_SYNC_FRAME;
+                        }
+                }
+        }
+
+        dma_data->name = substream->stream ? "Audio Capture" : "Audio Playback";
+        dma_data->dma_req = dma;
+        dma_data->port_addr = port;
+        dma_data->sync_mode = sync_mode;
+        dma_data->packet_size = pkt_size;
 
-        snd_soc_dai_set_dma_data(cpu_dai, substream,
-                &omap_mcbsp_dai_dma_params[id][substream->stream]);
+        snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data);
 
         if (mcbsp_data->configured) {
                 /* McBSP already configured by another stream */
@@ -419,7 +436,6 @@ static int omap_mcbsp_dai_hw_params(struct snd_pcm_substream *substream,
         switch (params_format(params)) {
         case SNDRV_PCM_FORMAT_S16_LE:
                 /* Set word lengths */
-                wlen = 16;
                 regs->rcr2      |= RWDLEN2(OMAP_MCBSP_WORD_16);
                 regs->rcr1      |= RWDLEN1(OMAP_MCBSP_WORD_16);
                 regs->xcr2      |= XWDLEN2(OMAP_MCBSP_WORD_16);
@@ -427,7 +443,6 @@ static int omap_mcbsp_dai_hw_params(struct snd_pcm_substream *substream,
                 break;
         case SNDRV_PCM_FORMAT_S32_LE:
                 /* Set word lengths */
-                wlen = 32;
                 regs->rcr2      |= RWDLEN2(OMAP_MCBSP_WORD_32);
                 regs->rcr1      |= RWDLEN1(OMAP_MCBSP_WORD_32);
                 regs->xcr2      |= XWDLEN2(OMAP_MCBSP_WORD_32);