From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> To: alsa-devel@alsa-project.org Cc: linux-kernel@vger.kernel.org, tiwai@suse.de, broonie@kernel.org, vkoul@kernel.org, gregkh@linuxfoundation.org, jank@cadence.com, srinivas.kandagatla@linaro.org, slawomir.blauciak@intel.com, Bard liao <yung-chuan.liao@linux.intel.com>, Rander Wang <rander.wang@linux.intel.com>, Ranjani Sridharan <ranjani.sridharan@linux.intel.com>, Hui Wang <hui.wang@canonical.com>, Rander Wang <rander.wang@intel.com>, Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>, Sanyog Kale <sanyog.r.kale@intel.com> Subject: [PATCH v2 03/17] soundwire: cadence: add interface to check clock status Date: Tue, 17 Mar 2020 11:33:15 -0500 [thread overview] Message-ID: <20200317163329.25501-4-pierre-louis.bossart@linux.intel.com> (raw) In-Reply-To: <20200317163329.25501-1-pierre-louis.bossart@linux.intel.com> From: Rander Wang <rander.wang@intel.com> If master is in clock stop state, driver can't modify registers in master except the registers for clock stop setting. Signed-off-by: Rander Wang <rander.wang@intel.com> Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> --- drivers/soundwire/cadence_master.c | 11 +++++++++++ drivers/soundwire/cadence_master.h | 2 ++ 2 files changed, 13 insertions(+) diff --git a/drivers/soundwire/cadence_master.c b/drivers/soundwire/cadence_master.c index 941809ea00a8..1bfdc1d4fcb1 100644 --- a/drivers/soundwire/cadence_master.c +++ b/drivers/soundwire/cadence_master.c @@ -1207,6 +1207,17 @@ static const struct sdw_master_port_ops cdns_port_ops = { .dpn_port_enable_ch = cdns_port_enable, }; +/** + * sdw_cdns_is_clock_stop: Check clock status + * + * @cdns: Cadence instance + */ +bool sdw_cdns_is_clock_stop(struct sdw_cdns *cdns) +{ + return !!(cdns_readl(cdns, CDNS_MCP_STAT) & CDNS_MCP_STAT_CLK_STOP); +} +EXPORT_SYMBOL(sdw_cdns_is_clock_stop); + /** * sdw_cdns_probe() - Cadence probe routine * @cdns: Cadence instance diff --git a/drivers/soundwire/cadence_master.h b/drivers/soundwire/cadence_master.h index 44e802bba702..691faa386889 100644 --- a/drivers/soundwire/cadence_master.h +++ b/drivers/soundwire/cadence_master.h @@ -144,6 +144,8 @@ int sdw_cdns_pdi_init(struct sdw_cdns *cdns, int sdw_cdns_exit_reset(struct sdw_cdns *cdns); int sdw_cdns_enable_interrupt(struct sdw_cdns *cdns, bool state); +bool sdw_cdns_is_clock_stop(struct sdw_cdns *cdns); + #ifdef CONFIG_DEBUG_FS void sdw_cdns_debugfs_init(struct sdw_cdns *cdns, struct dentry *root); #endif -- 2.20.1
WARNING: multiple messages have this Message-ID (diff)
From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> To: alsa-devel@alsa-project.org Cc: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>, tiwai@suse.de, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, Ranjani Sridharan <ranjani.sridharan@linux.intel.com>, Hui Wang <hui.wang@canonical.com>, vkoul@kernel.org, broonie@kernel.org, srinivas.kandagatla@linaro.org, jank@cadence.com, slawomir.blauciak@intel.com, Sanyog Kale <sanyog.r.kale@intel.com>, Rander Wang <rander.wang@intel.com>, Bard liao <yung-chuan.liao@linux.intel.com>, Rander Wang <rander.wang@linux.intel.com> Subject: [PATCH v2 03/17] soundwire: cadence: add interface to check clock status Date: Tue, 17 Mar 2020 11:33:15 -0500 [thread overview] Message-ID: <20200317163329.25501-4-pierre-louis.bossart@linux.intel.com> (raw) In-Reply-To: <20200317163329.25501-1-pierre-louis.bossart@linux.intel.com> From: Rander Wang <rander.wang@intel.com> If master is in clock stop state, driver can't modify registers in master except the registers for clock stop setting. Signed-off-by: Rander Wang <rander.wang@intel.com> Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> --- drivers/soundwire/cadence_master.c | 11 +++++++++++ drivers/soundwire/cadence_master.h | 2 ++ 2 files changed, 13 insertions(+) diff --git a/drivers/soundwire/cadence_master.c b/drivers/soundwire/cadence_master.c index 941809ea00a8..1bfdc1d4fcb1 100644 --- a/drivers/soundwire/cadence_master.c +++ b/drivers/soundwire/cadence_master.c @@ -1207,6 +1207,17 @@ static const struct sdw_master_port_ops cdns_port_ops = { .dpn_port_enable_ch = cdns_port_enable, }; +/** + * sdw_cdns_is_clock_stop: Check clock status + * + * @cdns: Cadence instance + */ +bool sdw_cdns_is_clock_stop(struct sdw_cdns *cdns) +{ + return !!(cdns_readl(cdns, CDNS_MCP_STAT) & CDNS_MCP_STAT_CLK_STOP); +} +EXPORT_SYMBOL(sdw_cdns_is_clock_stop); + /** * sdw_cdns_probe() - Cadence probe routine * @cdns: Cadence instance diff --git a/drivers/soundwire/cadence_master.h b/drivers/soundwire/cadence_master.h index 44e802bba702..691faa386889 100644 --- a/drivers/soundwire/cadence_master.h +++ b/drivers/soundwire/cadence_master.h @@ -144,6 +144,8 @@ int sdw_cdns_pdi_init(struct sdw_cdns *cdns, int sdw_cdns_exit_reset(struct sdw_cdns *cdns); int sdw_cdns_enable_interrupt(struct sdw_cdns *cdns, bool state); +bool sdw_cdns_is_clock_stop(struct sdw_cdns *cdns); + #ifdef CONFIG_DEBUG_FS void sdw_cdns_debugfs_init(struct sdw_cdns *cdns, struct dentry *root); #endif -- 2.20.1
next prev parent reply other threads:[~2020-03-17 16:34 UTC|newest] Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-03-17 16:33 [PATCH v2 00/17] SoundWire: cadence: add clock stop and fix programming sequences Pierre-Louis Bossart 2020-03-17 16:33 ` Pierre-Louis Bossart 2020-03-17 16:33 ` [PATCH v2 01/17] soundwire: cadence: s/update_config/config_update Pierre-Louis Bossart 2020-03-17 16:33 ` Pierre-Louis Bossart 2020-03-17 16:33 ` [PATCH v2 02/17] soundwire: cadence: simplifiy cdns_init() Pierre-Louis Bossart 2020-03-17 16:33 ` Pierre-Louis Bossart 2020-03-17 16:33 ` Pierre-Louis Bossart [this message] 2020-03-17 16:33 ` [PATCH v2 03/17] soundwire: cadence: add interface to check clock status Pierre-Louis Bossart 2020-03-17 16:33 ` [PATCH v2 04/17] soundwire: cadence: handle error cases with CONFIG_UPDATE Pierre-Louis Bossart 2020-03-17 16:33 ` Pierre-Louis Bossart 2020-03-17 16:33 ` [PATCH v2 05/17] soundwire: cadence: add clock_stop/restart routines Pierre-Louis Bossart 2020-03-17 16:33 ` Pierre-Louis Bossart 2020-03-17 16:33 ` [PATCH v2 06/17] soundwire: cadence: fix a io timeout issue in S3 test Pierre-Louis Bossart 2020-03-17 16:33 ` Pierre-Louis Bossart 2020-03-17 16:33 ` [PATCH v2 07/17] soundwire: cadence: mask Slave interrupt before stopping clock Pierre-Louis Bossart 2020-03-17 16:33 ` Pierre-Louis Bossart 2020-03-17 16:33 ` [PATCH v2 08/17] soundwire: cadence: merge routines to clear/set bits Pierre-Louis Bossart 2020-03-17 16:33 ` Pierre-Louis Bossart 2020-03-17 16:33 ` [PATCH v2 09/17] soundwire: cadence: move clock/SSP related inits to dedicated function Pierre-Louis Bossart 2020-03-17 16:33 ` Pierre-Louis Bossart 2020-03-17 16:33 ` [PATCH v2 10/17] soundwire: cadence: make SSP interval programmable Pierre-Louis Bossart 2020-03-17 16:33 ` Pierre-Louis Bossart 2020-03-17 16:33 ` [PATCH v2 11/17] soundwire: cadence: reorder MCP_CONFIG settings Pierre-Louis Bossart 2020-03-17 16:33 ` Pierre-Louis Bossart 2020-03-17 16:33 ` [PATCH v2 12/17] soundwire: cadence: enable NORMAL operation in cdns_init() Pierre-Louis Bossart 2020-03-17 16:33 ` Pierre-Louis Bossart 2020-03-17 16:33 ` [PATCH v2 13/17] soundwire: cadence: remove PREQ_DELAY assignment Pierre-Louis Bossart 2020-03-17 16:33 ` Pierre-Louis Bossart 2020-03-17 16:33 ` [PATCH v2 14/17] soundwire: cadence: remove automatic command retries Pierre-Louis Bossart 2020-03-17 16:33 ` Pierre-Louis Bossart 2020-03-17 16:33 ` [PATCH v2 15/17] soundwire: cadence: commit changes in the exit_reset() sequence Pierre-Louis Bossart 2020-03-17 16:33 ` Pierre-Louis Bossart 2020-03-17 16:33 ` [PATCH v2 16/17] soundwire: cadence: multi-link support Pierre-Louis Bossart 2020-03-17 16:33 ` Pierre-Louis Bossart 2020-03-17 16:33 ` [PATCH v2 17/17] soundwire: cadence: clear FIFO to avoid pop noise issue on playback start Pierre-Louis Bossart 2020-03-17 16:33 ` Pierre-Louis Bossart 2020-03-19 7:13 ` [PATCH v2 00/17] SoundWire: cadence: add clock stop and fix programming sequences Vinod Koul 2020-03-19 7:13 ` Vinod Koul
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