From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CE2C950C287; Wed, 30 Sep 2026 16:17:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790785056; cv=none; b=RXsAKWWNwHOwCc0cnPn0+hrwZf3kdmBudTbUwDdpxzcE6qqEeuQ7ZFHki0ams7O3ejz45y+K0U3dZEwp81KKZ5Z+ODEoWOZxcQstllmnQQdwtCEo3AHliY/lMda3+d4PraPx0aL49MV89el5f/WphmHOOAehPs229kzR+BZQgrc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790785056; c=relaxed/simple; bh=a/Sxrwc+Ck/S7VXdk/aqUeedH0zMDkDOrAlwuDi951s=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=c248lOjWKHJcqaTOCrLM7LWRk1T5pbak4ya/cPTC8j0smoior2DLS38QEZRtehOPSNXEqGX7nIFR+ADqmCQQfvwPPn9dM7WZRn46N8H58zXOPxG2n666e8a3VfrWcbx8ckqJGeruSa0BijxHo32F847Q5u9vEtpdng6YLz+o1PQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Udoy9dcV; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="Udoy9dcV" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 47DD41F00898; Wed, 30 Sep 2026 16:17:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1790785050; bh=CdVfPlorFXcRdSpEXEEObgxlVuDEWJQM8DLIekI2sDk=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=Udoy9dcVShJrpfz9HwwG8tRcayDzjzoLYak3GeUEDARw7awIXhA6BR8lWQKqYWx4z GttfjXTjpOyqLRdOMZv51ObvB5RQwA6G0l8UTvczOm6QUuRWGnC9Vdt+3UeosdP49K r/IBsqvwp66xM7XCq7kNkgZNp9uf+/wVPiJtIv7o= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Linus Walleij , Mark Brown , Sasha Levin Subject: [PATCH 6.1 372/982] ASoC: ux500: Fix MSP stream lifecycle handling Date: Wed, 30 Sep 2026 17:18:28 +0200 Message-ID: <20260930152424.802552475@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260930152416.775402466@linuxfoundation.org> References: <20260930152416.775402466@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Linus Walleij [ Upstream commit c37ba8fe00f264eee2fd18b0bff7c5f188136c51 ] The trigger stop path drops the direction busy flag even though ALSA still owns the stream until shutdown. A later trigger cannot reliably restart it, shutdown may leave the block configured, and a second stream may overwrite shared duplex configuration. Keep configured and running directions as separate state. Program shared settings only for the first direction, require a compatible configuration for the other half of a duplex stream, and enable the frame generator only while a provider stream is running. Also fix the RX-disable direction test and preserve the other direction multichannel setup. Fixes: 3592b7f69a54 ("ASoC: Ux500: Add MSP I2S-driver") Assisted-by: LLM Signed-off-by: Linus Walleij Link: https://patch.msgid.link/20260902-ux500-msp-fixes-v2-1-4b60b002d55a@kernel.org Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- sound/soc/ux500/ux500_msp_dai.c | 8 +- sound/soc/ux500/ux500_msp_i2s.c | 183 ++++++++++++++++++++++++-------- sound/soc/ux500/ux500_msp_i2s.h | 4 + 3 files changed, 149 insertions(+), 46 deletions(-) diff --git a/sound/soc/ux500/ux500_msp_dai.c b/sound/soc/ux500/ux500_msp_dai.c index 9d99ea6d7f30e..ae266927c0306 100644 --- a/sound/soc/ux500/ux500_msp_dai.c +++ b/sound/soc/ux500/ux500_msp_dai.c @@ -35,8 +35,10 @@ static int setup_pcm_multichan(struct snd_soc_dai *dai, if (drvdata->slots > 1) { msp_config->multichannel_configured = 1; - multi->tx_multichannel_enable = true; - multi->rx_multichannel_enable = true; + multi->tx_multichannel_enable = + msp_config->direction & MSP_DIR_TX; + multi->rx_multichannel_enable = + msp_config->direction & MSP_DIR_RX; multi->rx_comparison_enable_mode = MSP_COMPARISON_DISABLED; multi->tx_channel_0_enable = drvdata->tx_mask; @@ -193,6 +195,7 @@ static int setup_clocking(struct snd_soc_dai *dai, case SND_SOC_DAIFMT_BC_FC: dev_dbg(dai->dev, "%s: Codec is master.\n", __func__); + msp_config->clock_provider = false; msp_config->iodelay = 0x20; msp_config->rx_fsync_sel = 0; msp_config->tx_fsync_sel = 1 << TFSSEL_SHIFT; @@ -205,6 +208,7 @@ static int setup_clocking(struct snd_soc_dai *dai, case SND_SOC_DAIFMT_BP_FP: dev_dbg(dai->dev, "%s: Codec is slave.\n", __func__); + msp_config->clock_provider = true; msp_config->tx_clk_sel = TX_CLK_SEL_SRG; msp_config->tx_fsync_sel = TX_SYNC_SRG_PROG; msp_config->rx_clk_sel = RX_CLK_SEL_SRG; diff --git a/sound/soc/ux500/ux500_msp_i2s.c b/sound/soc/ux500/ux500_msp_i2s.c index d113411a19f82..baa5868d626d0 100644 --- a/sound/soc/ux500/ux500_msp_i2s.c +++ b/sound/soc/ux500/ux500_msp_i2s.c @@ -345,20 +345,27 @@ static int configure_multichannel(struct ux500_msp *msp, return 0; } -static int enable_msp(struct ux500_msp *msp, struct ux500_msp_config *config) +static int enable_msp(struct ux500_msp *msp, struct ux500_msp_config *config, + bool first) { - int status = 0; - u32 reg_val_DMACR, reg_val_GCR; + int status; + u32 reg_val_DMACR; /* Configure msp with protocol dependent settings */ - configure_protocol(msp, config); - setup_bitclk(msp, config); + status = configure_protocol(msp, config); + if (status) + return status; + + if (first && config->clock_provider) { + status = setup_bitclk(msp, config); + if (status) + return status; + } + if (config->multichannel_configured == 1) { status = configure_multichannel(msp, config); if (status) - dev_warn(msp->dev, - "%s: WARN: configure_multichannel failed (%d)!\n", - __func__, status); + return status; } /* Make sure the correct DMA-directions are configured */ @@ -384,11 +391,7 @@ static int enable_msp(struct ux500_msp *msp, struct ux500_msp_config *config) writel(config->iodelay, msp->registers + MSP_IODLY); - /* Enable frame generation logic */ - reg_val_GCR = readl(msp->registers + MSP_GCR); - writel(reg_val_GCR | FRAME_GEN_ENABLE, msp->registers + MSP_GCR); - - return status; + return 0; } static void flush_fifo_rx(struct ux500_msp *msp) @@ -426,12 +429,36 @@ static void flush_fifo_tx(struct ux500_msp *msp) writel(reg_val_GCR, msp->registers + MSP_GCR); } +static bool ux500_msp_config_compatible(struct ux500_msp *msp, + struct ux500_msp_config *config) +{ + struct ux500_msp_config *active = &msp->config; + + return active->f_inputclk == config->f_inputclk && + active->tx_clk_sel == config->tx_clk_sel && + active->rx_clk_sel == config->rx_clk_sel && + active->srg_clk_sel == config->srg_clk_sel && + active->rx_fsync_pol == config->rx_fsync_pol && + active->tx_fsync_pol == config->tx_fsync_pol && + active->rx_fsync_sel == config->rx_fsync_sel && + active->tx_fsync_sel == config->tx_fsync_sel && + active->default_protdesc == config->default_protdesc && + active->protocol == config->protocol && + active->frame_freq == config->frame_freq && + active->data_size == config->data_size && + active->def_elem_len == config->def_elem_len && + active->clock_provider == config->clock_provider && + !memcmp(&active->protdesc, &config->protdesc, + sizeof(active->protdesc)); +} + int ux500_msp_i2s_open(struct ux500_msp *msp, struct ux500_msp_config *config) { u32 old_reg, new_reg, mask; int res; unsigned int tx_sel, rx_sel, tx_busy, rx_busy; + bool first; if (in_interrupt()) { dev_err(msp->dev, @@ -459,40 +486,66 @@ int ux500_msp_i2s_open(struct ux500_msp *msp, return -EBUSY; } - msp->dir_busy |= (tx_sel ? MSP_DIR_TX : 0) | (rx_sel ? MSP_DIR_RX : 0); - - /* First do the global config register */ - mask = RX_CLK_SEL_MASK | TX_CLK_SEL_MASK | RX_FSYNC_MASK | - TX_FSYNC_MASK | RX_SYNC_SEL_MASK | TX_SYNC_SEL_MASK | - RX_FIFO_ENABLE_MASK | TX_FIFO_ENABLE_MASK | SRG_CLK_SEL_MASK | - LOOPBACK_MASK | TX_EXTRA_DELAY_MASK; - - new_reg = (config->tx_clk_sel | config->rx_clk_sel | - config->rx_fsync_pol | config->tx_fsync_pol | - config->rx_fsync_sel | config->tx_fsync_sel | - config->rx_fifo_config | config->tx_fifo_config | - config->srg_clk_sel | config->loopback_enable | - config->tx_data_enable); + first = !msp->dir_busy; + if (!first && !ux500_msp_config_compatible(msp, config)) { + dev_err(msp->dev, "%s: Incompatible duplex configuration\n", + __func__); + return -EBUSY; + } - old_reg = readl(msp->registers + MSP_GCR); - old_reg &= ~mask; - new_reg |= old_reg; - writel(new_reg, msp->registers + MSP_GCR); + if (first) { + /* First do the global config register */ + mask = RX_CLK_SEL_MASK | TX_CLK_SEL_MASK | RX_FSYNC_MASK | + TX_FSYNC_MASK | RX_SYNC_SEL_MASK | TX_SYNC_SEL_MASK | + RX_FIFO_ENABLE_MASK | TX_FIFO_ENABLE_MASK | + SRG_CLK_SEL_MASK | LOOPBACK_MASK | TX_EXTRA_DELAY_MASK; + + new_reg = config->tx_clk_sel | config->rx_clk_sel | + config->rx_fsync_pol | config->tx_fsync_pol | + config->rx_fsync_sel | config->tx_fsync_sel | + config->rx_fifo_config | config->tx_fifo_config | + config->srg_clk_sel | config->loopback_enable | + config->tx_data_enable; + + old_reg = readl(msp->registers + MSP_GCR); + old_reg &= ~mask; + new_reg |= old_reg; + writel(new_reg, msp->registers + MSP_GCR); + } - res = enable_msp(msp, config); + res = enable_msp(msp, config, first); if (res < 0) { dev_err(msp->dev, "%s: ERROR: enable_msp failed (%d)!\n", __func__, res); - return -EBUSY; + if (tx_sel) + writel(0, msp->registers + MSP_TCF); + if (rx_sel) + writel(0, msp->registers + MSP_RCF); + if (first) { + writel(0, msp->registers + MSP_GCR); + writel(0, msp->registers + MSP_DMACR); + writel(0, msp->registers + MSP_SRG); + writel(0, msp->registers + MSP_MCR); + } + return res; + } + + msp->dir_busy |= config->direction; + if (first) { + msp->config = *config; + msp->clock_provider = config->clock_provider; } if (config->loopback_enable & 0x80) msp->loopback_enable = 1; /* Flush FIFOs */ - flush_fifo_tx(msp); - flush_fifo_rx(msp); + if (tx_sel) + flush_fifo_tx(msp); + if (rx_sel) + flush_fifo_rx(msp); - msp->msp_state = MSP_STATE_CONFIGURED; + if (!msp->dir_running) + msp->msp_state = MSP_STATE_CONFIGURED; return 0; } @@ -509,7 +562,6 @@ static void disable_msp_rx(struct ux500_msp *msp) ~(RX_SERVICE_INT | RX_OVERRUN_ERROR_INT), msp->registers + MSP_IMSC); - msp->dir_busy &= ~MSP_DIR_RX; } static void disable_msp_tx(struct ux500_msp *msp) @@ -525,7 +577,6 @@ static void disable_msp_tx(struct ux500_msp *msp) ~(TX_SERVICE_INT | TX_UNDERRUN_ERR_INT), msp->registers + MSP_IMSC); - msp->dir_busy &= ~MSP_DIR_TX; } static int disable_msp(struct ux500_msp *msp, unsigned int dir) @@ -535,7 +586,7 @@ static int disable_msp(struct ux500_msp *msp, unsigned int dir) reg_val_GCR = readl(msp->registers + MSP_GCR); disable_tx = dir & MSP_DIR_TX; - disable_rx = dir & MSP_DIR_TX; + disable_rx = dir & MSP_DIR_RX; if (disable_tx && disable_rx) { reg_val_GCR = readl(msp->registers + MSP_GCR); writel(reg_val_GCR | LOOPBACK_MASK, @@ -568,7 +619,15 @@ static int disable_msp(struct ux500_msp *msp, unsigned int dir) int ux500_msp_i2s_trigger(struct ux500_msp *msp, int cmd, int direction) { - u32 reg_val_GCR, enable_bit; + u32 reg_val_DMACR, reg_val_GCR, dma_enable_bit, enable_bit; + unsigned int dir; + + if (direction == SNDRV_PCM_STREAM_PLAYBACK) + dir = MSP_DIR_TX; + else if (direction == SNDRV_PCM_STREAM_CAPTURE) + dir = MSP_DIR_RX; + else + return -EINVAL; if (msp->msp_state == MSP_STATE_IDLE) { dev_err(msp->dev, "%s: ERROR: MSP is not configured!\n", @@ -580,21 +639,44 @@ int ux500_msp_i2s_trigger(struct ux500_msp *msp, int cmd, int direction) case SNDRV_PCM_TRIGGER_START: case SNDRV_PCM_TRIGGER_RESUME: case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: - if (direction == SNDRV_PCM_STREAM_PLAYBACK) + if (direction == SNDRV_PCM_STREAM_PLAYBACK) { enable_bit = TX_ENABLE; - else + dma_enable_bit = TX_DMA_ENABLE; + } else { enable_bit = RX_ENABLE; + dma_enable_bit = RX_DMA_ENABLE; + } + if (!(msp->dir_busy & dir)) + return -EINVAL; + reg_val_DMACR = readl(msp->registers + MSP_DMACR); + writel(reg_val_DMACR | dma_enable_bit, + msp->registers + MSP_DMACR); reg_val_GCR = readl(msp->registers + MSP_GCR); + if (msp->clock_provider) + enable_bit |= FRAME_GEN_ENABLE; writel(reg_val_GCR | enable_bit, msp->registers + MSP_GCR); + msp->dir_running |= dir; + msp->msp_state = MSP_STATE_RUNNING; break; case SNDRV_PCM_TRIGGER_STOP: case SNDRV_PCM_TRIGGER_SUSPEND: case SNDRV_PCM_TRIGGER_PAUSE_PUSH: - if (direction == SNDRV_PCM_STREAM_PLAYBACK) + if (!(msp->dir_busy & dir)) + return -EINVAL; + if (direction == SNDRV_PCM_STREAM_PLAYBACK) { disable_msp_tx(msp); - else + msp->dir_running &= ~MSP_DIR_TX; + } else { disable_msp_rx(msp); + msp->dir_running &= ~MSP_DIR_RX; + } + if (!msp->dir_running) { + reg_val_GCR = readl(msp->registers + MSP_GCR); + writel(reg_val_GCR & ~FRAME_GEN_ENABLE, + msp->registers + MSP_GCR); + msp->msp_state = MSP_STATE_CONFIGURED; + } break; default: return -EINVAL; @@ -609,7 +691,18 @@ int ux500_msp_i2s_close(struct ux500_msp *msp, unsigned int dir) dev_dbg(msp->dev, "%s: Enter (dir = 0x%01x).\n", __func__, dir); + if (!dir || dir & ~(MSP_DIR_TX | MSP_DIR_RX) || + (msp->dir_busy & dir) != dir) + return -EINVAL; + status = disable_msp(msp, dir); + msp->dir_busy &= ~dir; + msp->dir_running &= ~dir; + if (msp->dir_busy && !msp->dir_running) { + writel(readl(msp->registers + MSP_GCR) & ~FRAME_GEN_ENABLE, + msp->registers + MSP_GCR); + msp->msp_state = MSP_STATE_CONFIGURED; + } if (msp->dir_busy == 0) { /* disable sample rate and frame generators */ msp->msp_state = MSP_STATE_IDLE; @@ -633,6 +726,8 @@ int ux500_msp_i2s_close(struct ux500_msp *msp, unsigned int dir) writel(0, msp->registers + MSP_RCE1); writel(0, msp->registers + MSP_RCE2); writel(0, msp->registers + MSP_RCE3); + memset(&msp->config, 0, sizeof(msp->config)); + msp->clock_provider = false; } return status; diff --git a/sound/soc/ux500/ux500_msp_i2s.h b/sound/soc/ux500/ux500_msp_i2s.h index d45b5e2831cc0..ad7977b70d264 100644 --- a/sound/soc/ux500/ux500_msp_i2s.h +++ b/sound/soc/ux500/ux500_msp_i2s.h @@ -461,6 +461,7 @@ struct ux500_msp_config { enum msp_data_size data_size; unsigned int def_elem_len; unsigned int iodelay; + bool clock_provider; }; struct ux500_msp_dma_params { @@ -478,8 +479,11 @@ struct ux500_msp { enum msp_state msp_state; int def_elem_len; unsigned int dir_busy; + unsigned int dir_running; int loopback_enable; unsigned int f_bitclk; + bool clock_provider; + struct ux500_msp_config config; }; struct msp_i2s_platform_data; -- 2.53.0