Message ID | 20190725234032.21152-29-pierre-louis.bossart@linux.intel.com (mailing list archive) |
---|---|
State | New, archived |
Headers | show |
Series | soundwire: updates for 5.4 | expand |
On Thu, Jul 25, 2019 at 06:40:20PM -0500, Pierre-Louis Bossart wrote: > On most hardware platforms, SoundWire interfaces are pin-muxed with > other interfaces (typically DMIC or I2S) and the status of each link > needs to be checked at boot time. > > For Intel platforms, the BIOS provides a menu to enable/disable the > links separately, and the information is provided to the OS with an > Intel-specific _DSD property. The same capability will be added to > revisions of the MIPI DisCo specification. > > Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> > --- > drivers/soundwire/intel.c | 26 ++++++++++++++++++++++---- > include/linux/soundwire/sdw.h | 2 ++ > 2 files changed, 24 insertions(+), 4 deletions(-) > > diff --git a/drivers/soundwire/intel.c b/drivers/soundwire/intel.c > index 796ac2bc8cea..5947fa8e840b 100644 > --- a/drivers/soundwire/intel.c > +++ b/drivers/soundwire/intel.c > @@ -90,6 +90,8 @@ > #define SDW_ALH_STRMZCFG_DMAT GENMASK(7, 0) > #define SDW_ALH_STRMZCFG_CHN GENMASK(19, 16) > > +#define SDW_INTEL_QUIRK_MASK_BUS_DISABLE BIT(1) > + > enum intel_pdi_type { > INTEL_PDI_IN = 0, > INTEL_PDI_OUT = 1, > @@ -922,7 +924,7 @@ static int sdw_master_read_intel_prop(struct sdw_bus *bus) > struct sdw_master_prop *prop = &bus->prop; > struct fwnode_handle *link; > char name[32]; > - int nval, i; > + u32 quirk_mask; > > /* Find master handle */ > snprintf(name, sizeof(name), > @@ -937,6 +939,14 @@ static int sdw_master_read_intel_prop(struct sdw_bus *bus) > fwnode_property_read_u32(link, > "intel-sdw-ip-clock", > &prop->mclk_freq); > + > + fwnode_property_read_u32(link, > + "intel-quirk-mask", > + &quirk_mask); > + > + if (quirk_mask & SDW_INTEL_QUIRK_MASK_BUS_DISABLE) > + prop->hw_disabled = true; > + > return 0; > } > > @@ -997,6 +1007,12 @@ static int intel_probe(struct platform_device *pdev) > goto err_master_reg; > } > > + if (sdw->cdns.bus.prop.hw_disabled) { > + dev_info(&pdev->dev, "SoundWire master %d is disabled, ignoring\n", > + sdw->cdns.bus.link_id); > + return 0; > + } > + > /* Initialize shim and controller */ > intel_link_power_up(sdw); > intel_shim_init(sdw); > @@ -1050,9 +1066,11 @@ static int intel_remove(struct platform_device *pdev) > > sdw = platform_get_drvdata(pdev); > > - intel_debugfs_exit(sdw); > - free_irq(sdw->res->irq, sdw); > - snd_soc_unregister_component(sdw->cdns.dev); > + if (!sdw->cdns.bus.prop.hw_disabled) { > + intel_debugfs_exit(sdw); > + free_irq(sdw->res->irq, sdw); > + snd_soc_unregister_component(sdw->cdns.dev); > + } > sdw_delete_bus_master(&sdw->cdns.bus); > > return 0; > diff --git a/include/linux/soundwire/sdw.h b/include/linux/soundwire/sdw.h > index c7dfc824be80..f78b076a8782 100644 > --- a/include/linux/soundwire/sdw.h > +++ b/include/linux/soundwire/sdw.h > @@ -380,6 +380,7 @@ struct sdw_slave_prop { > * @err_threshold: Number of times that software may retry sending a single > * command > * @mclk_freq: clock reference passed to SoundWire Master, in Hz. > + * @hw_disabled: if true, the Master is not functional, typically due to pin-mux > */ > struct sdw_master_prop { > u32 revision; > @@ -395,6 +396,7 @@ struct sdw_master_prop { > bool dynamic_frame; > u32 err_threshold; > u32 mclk_freq; > + bool hw_disabled; Do we have such cases where some of SoundWire links are disabled and some enabled? > }; > > int sdw_master_read_prop(struct sdw_bus *bus); > -- > 2.20.1 >
On 8/5/19 11:57 AM, Sanyog Kale wrote: > On Thu, Jul 25, 2019 at 06:40:20PM -0500, Pierre-Louis Bossart wrote: >> On most hardware platforms, SoundWire interfaces are pin-muxed with >> other interfaces (typically DMIC or I2S) and the status of each link >> needs to be checked at boot time. >> >> For Intel platforms, the BIOS provides a menu to enable/disable the >> links separately, and the information is provided to the OS with an >> Intel-specific _DSD property. The same capability will be added to >> revisions of the MIPI DisCo specification. [snip] >> diff --git a/include/linux/soundwire/sdw.h b/include/linux/soundwire/sdw.h >> index c7dfc824be80..f78b076a8782 100644 >> --- a/include/linux/soundwire/sdw.h >> +++ b/include/linux/soundwire/sdw.h >> @@ -380,6 +380,7 @@ struct sdw_slave_prop { >> * @err_threshold: Number of times that software may retry sending a single >> * command >> * @mclk_freq: clock reference passed to SoundWire Master, in Hz. >> + * @hw_disabled: if true, the Master is not functional, typically due to pin-mux >> */ >> struct sdw_master_prop { >> u32 revision; >> @@ -395,6 +396,7 @@ struct sdw_master_prop { >> bool dynamic_frame; >> u32 err_threshold; >> u32 mclk_freq; >> + bool hw_disabled; > > Do we have such cases where some of SoundWire links are disabled and > some enabled? Yes, by default my ICL test board uses HDaudio for the codec so the SoundWire link0 is disabled. If I rework the board and change the BIOS advanced menu then SoundWire link0 is enabled. This information is dynamically provided to the OS after the _INI step. SoundWire-2/3 are used typically for attached DMICs or for a combination of SoundWire amplifier and mic capture. It's really platform-specific. > >> }; >> >> int sdw_master_read_prop(struct sdw_bus *bus); >> -- >> 2.20.1 >> >
diff --git a/drivers/soundwire/intel.c b/drivers/soundwire/intel.c index 796ac2bc8cea..5947fa8e840b 100644 --- a/drivers/soundwire/intel.c +++ b/drivers/soundwire/intel.c @@ -90,6 +90,8 @@ #define SDW_ALH_STRMZCFG_DMAT GENMASK(7, 0) #define SDW_ALH_STRMZCFG_CHN GENMASK(19, 16) +#define SDW_INTEL_QUIRK_MASK_BUS_DISABLE BIT(1) + enum intel_pdi_type { INTEL_PDI_IN = 0, INTEL_PDI_OUT = 1, @@ -922,7 +924,7 @@ static int sdw_master_read_intel_prop(struct sdw_bus *bus) struct sdw_master_prop *prop = &bus->prop; struct fwnode_handle *link; char name[32]; - int nval, i; + u32 quirk_mask; /* Find master handle */ snprintf(name, sizeof(name), @@ -937,6 +939,14 @@ static int sdw_master_read_intel_prop(struct sdw_bus *bus) fwnode_property_read_u32(link, "intel-sdw-ip-clock", &prop->mclk_freq); + + fwnode_property_read_u32(link, + "intel-quirk-mask", + &quirk_mask); + + if (quirk_mask & SDW_INTEL_QUIRK_MASK_BUS_DISABLE) + prop->hw_disabled = true; + return 0; } @@ -997,6 +1007,12 @@ static int intel_probe(struct platform_device *pdev) goto err_master_reg; } + if (sdw->cdns.bus.prop.hw_disabled) { + dev_info(&pdev->dev, "SoundWire master %d is disabled, ignoring\n", + sdw->cdns.bus.link_id); + return 0; + } + /* Initialize shim and controller */ intel_link_power_up(sdw); intel_shim_init(sdw); @@ -1050,9 +1066,11 @@ static int intel_remove(struct platform_device *pdev) sdw = platform_get_drvdata(pdev); - intel_debugfs_exit(sdw); - free_irq(sdw->res->irq, sdw); - snd_soc_unregister_component(sdw->cdns.dev); + if (!sdw->cdns.bus.prop.hw_disabled) { + intel_debugfs_exit(sdw); + free_irq(sdw->res->irq, sdw); + snd_soc_unregister_component(sdw->cdns.dev); + } sdw_delete_bus_master(&sdw->cdns.bus); return 0; diff --git a/include/linux/soundwire/sdw.h b/include/linux/soundwire/sdw.h index c7dfc824be80..f78b076a8782 100644 --- a/include/linux/soundwire/sdw.h +++ b/include/linux/soundwire/sdw.h @@ -380,6 +380,7 @@ struct sdw_slave_prop { * @err_threshold: Number of times that software may retry sending a single * command * @mclk_freq: clock reference passed to SoundWire Master, in Hz. + * @hw_disabled: if true, the Master is not functional, typically due to pin-mux */ struct sdw_master_prop { u32 revision; @@ -395,6 +396,7 @@ struct sdw_master_prop { bool dynamic_frame; u32 err_threshold; u32 mclk_freq; + bool hw_disabled; }; int sdw_master_read_prop(struct sdw_bus *bus);
On most hardware platforms, SoundWire interfaces are pin-muxed with other interfaces (typically DMIC or I2S) and the status of each link needs to be checked at boot time. For Intel platforms, the BIOS provides a menu to enable/disable the links separately, and the information is provided to the OS with an Intel-specific _DSD property. The same capability will be added to revisions of the MIPI DisCo specification. Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> --- drivers/soundwire/intel.c | 26 ++++++++++++++++++++++---- include/linux/soundwire/sdw.h | 2 ++ 2 files changed, 24 insertions(+), 4 deletions(-)