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Tue, 4 Jun 2024 05:02:15 -0500 Received: from lelvsmtp5.itg.ti.com (10.180.75.250) by DFLE102.ent.ti.com (10.64.6.23) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.23 via Frontend Transport; Tue, 4 Jun 2024 05:02:15 -0500 Received: from localhost (jluthra.dhcp.ti.com [172.24.227.116]) by lelvsmtp5.itg.ti.com (8.15.2/8.15.2) with ESMTP id 454A2E92130460; Tue, 4 Jun 2024 05:02:15 -0500 From: Jai Luthra Date: Tue, 4 Jun 2024 15:31:51 +0530 Subject: [PATCH 2/2] ASoC: ti: davinci-mcasp: Set min period size using FIFO config MIME-Version: 1.0 Message-ID: <20240604-asoc_next-v1-2-e895c88e744d@ti.com> References: <20240604-asoc_next-v1-0-e895c88e744d@ti.com> In-Reply-To: <20240604-asoc_next-v1-0-e895c88e744d@ti.com> To: Lars-Peter Clausen , Jaroslav Kysela , Takashi Iwai , Liam Girdwood , Mark Brown , Peter Ujfalusi CC: , , , Jai Luthra X-Mailer: b4 0.12.4 X-Developer-Signature: v=1; a=openpgp-sha256; l=2259; i=j-luthra@ti.com; h=from:subject:message-id; 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no-senders; approved; emergency; loop; banned-address; member-moderation; header-match-alsa-devel.alsa-project.org-0; header-match-alsa-devel.alsa-project.org-1 Message-ID-Hash: JQLP4RJAPPTO2RQMLRDXGZXI2VZZOJEG X-Message-ID-Hash: JQLP4RJAPPTO2RQMLRDXGZXI2VZZOJEG X-Mailman-Approved-At: Thu, 13 Jun 2024 16:02:20 +0000 X-Mailman-Version: 3.3.9 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: The minimum period size was enforced to 64 as older devices integrating McASP with EDMA used an internal FIFO of 64 samples. With UDMA based platforms this internal McASP FIFO is optional, as the DMA engine internally does some buffering which is already accounted for when registering the platform. So we should read the actual FIFO configuration (txnumevt/rxnumevt) instead of hardcoding frames.min to 64. Signed-off-by: Jai Luthra --- sound/soc/ti/davinci-mcasp.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/sound/soc/ti/davinci-mcasp.c b/sound/soc/ti/davinci-mcasp.c index 1e760c315521..2a53fb7e72eb 100644 --- a/sound/soc/ti/davinci-mcasp.c +++ b/sound/soc/ti/davinci-mcasp.c @@ -70,6 +70,7 @@ struct davinci_mcasp_context { struct davinci_mcasp_ruledata { struct davinci_mcasp *mcasp; int serializers; + u8 numevt; }; struct davinci_mcasp { @@ -1470,12 +1471,13 @@ static int davinci_mcasp_hw_rule_format(struct snd_pcm_hw_params *params, static int davinci_mcasp_hw_rule_min_periodsize( struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) { + struct davinci_mcasp_ruledata *rd = rule->private; struct snd_interval *period_size = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE); struct snd_interval frames; snd_interval_any(&frames); - frames.min = 64; + frames.min = rd->numevt; frames.integer = 1; return snd_interval_refine(period_size, &frames); @@ -1516,6 +1518,9 @@ static int davinci_mcasp_startup(struct snd_pcm_substream *substream, if (mcasp->serial_dir[i] == dir) max_channels++; } + ruledata->numevt = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? + mcasp->txnumevt : + mcasp->rxnumevt; ruledata->serializers = max_channels; ruledata->mcasp = mcasp; max_channels *= tdm_slots; @@ -1591,7 +1596,7 @@ static int davinci_mcasp_startup(struct snd_pcm_substream *substream, snd_pcm_hw_rule_add(substream->runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, - davinci_mcasp_hw_rule_min_periodsize, NULL, + davinci_mcasp_hw_rule_min_periodsize, ruledata, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); return 0;