diff mbox series

[v3,2/4] soundwire: Provide build stubs for common functions

Message ID 20221121141406.3840561-3-ckeepax@opensource.cirrus.com
State New
Headers show
Series None | expand

Commit Message

Charles Keepax Nov. 21, 2022, 2:14 p.m. UTC 
Provide stub functions when CONFIG_SOUNDWIRE is not set for functions
that are quite likely to be used from common code on devices supporting
multiple control buses.

Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
---

No changes since v2.

 include/linux/soundwire/sdw.h | 92 +++++++++++++++++++++++++++++++----
 1 file changed, 82 insertions(+), 10 deletions(-)

Comments

Vinod Koul Nov. 24, 2022, 4:51 a.m. UTC | #1 
On 21-11-22, 14:14, Charles Keepax wrote:
> Provide stub functions when CONFIG_SOUNDWIRE is not set for functions
> that are quite likely to be used from common code on devices supporting
> multiple control buses.
> 
> Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
> Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
> ---
> 
> No changes since v2.
> 
>  include/linux/soundwire/sdw.h | 92 +++++++++++++++++++++++++++++++----
>  1 file changed, 82 insertions(+), 10 deletions(-)
> 
> diff --git a/include/linux/soundwire/sdw.h b/include/linux/soundwire/sdw.h
> index 902ed46f76c80..4f80cba898f11 100644
> --- a/include/linux/soundwire/sdw.h
> +++ b/include/linux/soundwire/sdw.h
> @@ -1021,15 +1021,8 @@ int sdw_stream_add_master(struct sdw_bus *bus,
>  		struct sdw_port_config *port_config,
>  		unsigned int num_ports,
>  		struct sdw_stream_runtime *stream);
> -int sdw_stream_add_slave(struct sdw_slave *slave,
> -		struct sdw_stream_config *stream_config,
> -		struct sdw_port_config *port_config,
> -		unsigned int num_ports,
> -		struct sdw_stream_runtime *stream);
>  int sdw_stream_remove_master(struct sdw_bus *bus,
>  		struct sdw_stream_runtime *stream);
> -int sdw_stream_remove_slave(struct sdw_slave *slave,
> -		struct sdw_stream_runtime *stream);
>  int sdw_startup_stream(void *sdw_substream);
>  int sdw_prepare_stream(struct sdw_stream_runtime *stream);
>  int sdw_enable_stream(struct sdw_stream_runtime *stream);
> @@ -1040,8 +1033,20 @@ int sdw_bus_prep_clk_stop(struct sdw_bus *bus);
>  int sdw_bus_clk_stop(struct sdw_bus *bus);
>  int sdw_bus_exit_clk_stop(struct sdw_bus *bus);
>  
> -/* messaging and data APIs */
> +int sdw_compare_devid(struct sdw_slave *slave, struct sdw_slave_id id);
> +void sdw_extract_slave_id(struct sdw_bus *bus, u64 addr, struct sdw_slave_id *id);
> +
> +#if IS_ENABLED(CONFIG_SOUNDWIRE)
>  
> +int sdw_stream_add_slave(struct sdw_slave *slave,
> +			 struct sdw_stream_config *stream_config,
> +			 struct sdw_port_config *port_config,
> +			 unsigned int num_ports,
> +			 struct sdw_stream_runtime *stream);
> +int sdw_stream_remove_slave(struct sdw_slave *slave,
> +			    struct sdw_stream_runtime *stream);
> +
> +/* messaging and data APIs */
>  int sdw_read(struct sdw_slave *slave, u32 addr);
>  int sdw_write(struct sdw_slave *slave, u32 addr, u8 value);
>  int sdw_write_no_pm(struct sdw_slave *slave, u32 addr, u8 value);
> @@ -1053,7 +1058,74 @@ int sdw_nwrite_no_pm(struct sdw_slave *slave, u32 addr, size_t count, const u8 *
>  int sdw_update(struct sdw_slave *slave, u32 addr, u8 mask, u8 val);
>  int sdw_update_no_pm(struct sdw_slave *slave, u32 addr, u8 mask, u8 val);
>  
> -int sdw_compare_devid(struct sdw_slave *slave, struct sdw_slave_id id);
> -void sdw_extract_slave_id(struct sdw_bus *bus, u64 addr, struct sdw_slave_id *id);
> +#else
> +
> +static inline int sdw_stream_add_slave(struct sdw_slave *slave,
> +				       struct sdw_stream_config *stream_config,
> +				       struct sdw_port_config *port_config,
> +				       unsigned int num_ports,
> +				       struct sdw_stream_runtime *stream)
> +{
> +	return 0;

Should this and other here not return error...? Indicating sdw is not
available..? Silently ignoring may not be very helpful in debugging


> +}
> +
> +static inline int sdw_stream_remove_slave(struct sdw_slave *slave,
> +					  struct sdw_stream_runtime *stream)
> +{
> +	return 0;
> +}
> +
> +/* messaging and data APIs */
> +static inline int sdw_read(struct sdw_slave *slave, u32 addr)
> +{
> +	return 0;
> +}
> +
> +static inline int sdw_write(struct sdw_slave *slave, u32 addr, u8 value)
> +{
> +	return 0;
> +}
> +
> +static inline int sdw_write_no_pm(struct sdw_slave *slave, u32 addr, u8 value)
> +{
> +	return 0;
> +}
> +
> +static inline int sdw_read_no_pm(struct sdw_slave *slave, u32 addr)
> +{
> +	return 0;
> +}
> +
> +static inline int sdw_nread(struct sdw_slave *slave, u32 addr, size_t count, u8 *val)
> +{
> +	return 0;
> +}
> +
> +static inline int sdw_nread_no_pm(struct sdw_slave *slave, u32 addr, size_t count, u8 *val)
> +{
> +	return 0;
> +}
> +
> +static inline int sdw_nwrite(struct sdw_slave *slave, u32 addr, size_t count, const u8 *val)
> +{
> +	return 0;
> +}
> +
> +static inline int sdw_nwrite_no_pm(struct sdw_slave *slave, u32 addr, size_t count, const u8 *val)
> +{
> +	return 0;
> +}
> +
> +static inline int sdw_update(struct sdw_slave *slave, u32 addr, u8 mask, u8 val)
> +{
> +	return 0;
> +}
> +
> +static inline int sdw_update_no_pm(struct sdw_slave *slave, u32 addr, u8 mask, u8 val)
> +{
> +	return 0;
> +}
> +
> +#endif /* CONFIG_SOUNDWIRE */
>  
>  #endif /* __SOUNDWIRE_H */
> -- 
> 2.30.2
Charles Keepax Nov. 24, 2022, 9:22 a.m. UTC | #2 
On Thu, Nov 24, 2022 at 10:21:32AM +0530, Vinod Koul wrote:
> On 21-11-22, 14:14, Charles Keepax wrote:
> > Provide stub functions when CONFIG_SOUNDWIRE is not set for functions
> > that are quite likely to be used from common code on devices supporting
> > multiple control buses.
> > 
> > Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
> > Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
> > ---
> > +static inline int sdw_stream_add_slave(struct sdw_slave *slave,
> > +				       struct sdw_stream_config *stream_config,
> > +				       struct sdw_port_config *port_config,
> > +				       unsigned int num_ports,
> > +				       struct sdw_stream_runtime *stream)
> > +{
> > +	return 0;
> 
> Should this and other here not return error...? Indicating sdw is not
> available..? Silently ignoring may not be very helpful in debugging
> 

Yeah I was a little unsure which way to go on that, in the end I
opted for returning zero as it was more likely code would get
optimised out. But I am happy to switch to returning an error, it
would as you say making debugging misconfigurations easier.
-ENOSYS seems kinda reasonable I think.

Thanks,
Charles
Vinod Koul Nov. 24, 2022, 9:32 a.m. UTC | #3 
On 24-11-22, 09:22, Charles Keepax wrote:
> On Thu, Nov 24, 2022 at 10:21:32AM +0530, Vinod Koul wrote:
> > On 21-11-22, 14:14, Charles Keepax wrote:
> > > Provide stub functions when CONFIG_SOUNDWIRE is not set for functions
> > > that are quite likely to be used from common code on devices supporting
> > > multiple control buses.
> > > 
> > > Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
> > > Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
> > > ---
> > > +static inline int sdw_stream_add_slave(struct sdw_slave *slave,
> > > +				       struct sdw_stream_config *stream_config,
> > > +				       struct sdw_port_config *port_config,
> > > +				       unsigned int num_ports,
> > > +				       struct sdw_stream_runtime *stream)
> > > +{
> > > +	return 0;
> > 
> > Should this and other here not return error...? Indicating sdw is not
> > available..? Silently ignoring may not be very helpful in debugging
> > 
> 
> Yeah I was a little unsure which way to go on that, in the end I
> opted for returning zero as it was more likely code would get
> optimised out. But I am happy to switch to returning an error, it
> would as you say making debugging misconfigurations easier.
> -ENOSYS seems kinda reasonable I think.

Right, -ENOSYS seems to be apt here
diff mbox series

Patch

diff --git a/include/linux/soundwire/sdw.h b/include/linux/soundwire/sdw.h
index 902ed46f76c80..4f80cba898f11 100644
--- a/include/linux/soundwire/sdw.h
+++ b/include/linux/soundwire/sdw.h
@@ -1021,15 +1021,8 @@  int sdw_stream_add_master(struct sdw_bus *bus,
 		struct sdw_port_config *port_config,
 		unsigned int num_ports,
 		struct sdw_stream_runtime *stream);
-int sdw_stream_add_slave(struct sdw_slave *slave,
-		struct sdw_stream_config *stream_config,
-		struct sdw_port_config *port_config,
-		unsigned int num_ports,
-		struct sdw_stream_runtime *stream);
 int sdw_stream_remove_master(struct sdw_bus *bus,
 		struct sdw_stream_runtime *stream);
-int sdw_stream_remove_slave(struct sdw_slave *slave,
-		struct sdw_stream_runtime *stream);
 int sdw_startup_stream(void *sdw_substream);
 int sdw_prepare_stream(struct sdw_stream_runtime *stream);
 int sdw_enable_stream(struct sdw_stream_runtime *stream);
@@ -1040,8 +1033,20 @@  int sdw_bus_prep_clk_stop(struct sdw_bus *bus);
 int sdw_bus_clk_stop(struct sdw_bus *bus);
 int sdw_bus_exit_clk_stop(struct sdw_bus *bus);
 
-/* messaging and data APIs */
+int sdw_compare_devid(struct sdw_slave *slave, struct sdw_slave_id id);
+void sdw_extract_slave_id(struct sdw_bus *bus, u64 addr, struct sdw_slave_id *id);
+
+#if IS_ENABLED(CONFIG_SOUNDWIRE)
 
+int sdw_stream_add_slave(struct sdw_slave *slave,
+			 struct sdw_stream_config *stream_config,
+			 struct sdw_port_config *port_config,
+			 unsigned int num_ports,
+			 struct sdw_stream_runtime *stream);
+int sdw_stream_remove_slave(struct sdw_slave *slave,
+			    struct sdw_stream_runtime *stream);
+
+/* messaging and data APIs */
 int sdw_read(struct sdw_slave *slave, u32 addr);
 int sdw_write(struct sdw_slave *slave, u32 addr, u8 value);
 int sdw_write_no_pm(struct sdw_slave *slave, u32 addr, u8 value);
@@ -1053,7 +1058,74 @@  int sdw_nwrite_no_pm(struct sdw_slave *slave, u32 addr, size_t count, const u8 *
 int sdw_update(struct sdw_slave *slave, u32 addr, u8 mask, u8 val);
 int sdw_update_no_pm(struct sdw_slave *slave, u32 addr, u8 mask, u8 val);
 
-int sdw_compare_devid(struct sdw_slave *slave, struct sdw_slave_id id);
-void sdw_extract_slave_id(struct sdw_bus *bus, u64 addr, struct sdw_slave_id *id);
+#else
+
+static inline int sdw_stream_add_slave(struct sdw_slave *slave,
+				       struct sdw_stream_config *stream_config,
+				       struct sdw_port_config *port_config,
+				       unsigned int num_ports,
+				       struct sdw_stream_runtime *stream)
+{
+	return 0;
+}
+
+static inline int sdw_stream_remove_slave(struct sdw_slave *slave,
+					  struct sdw_stream_runtime *stream)
+{
+	return 0;
+}
+
+/* messaging and data APIs */
+static inline int sdw_read(struct sdw_slave *slave, u32 addr)
+{
+	return 0;
+}
+
+static inline int sdw_write(struct sdw_slave *slave, u32 addr, u8 value)
+{
+	return 0;
+}
+
+static inline int sdw_write_no_pm(struct sdw_slave *slave, u32 addr, u8 value)
+{
+	return 0;
+}
+
+static inline int sdw_read_no_pm(struct sdw_slave *slave, u32 addr)
+{
+	return 0;
+}
+
+static inline int sdw_nread(struct sdw_slave *slave, u32 addr, size_t count, u8 *val)
+{
+	return 0;
+}
+
+static inline int sdw_nread_no_pm(struct sdw_slave *slave, u32 addr, size_t count, u8 *val)
+{
+	return 0;
+}
+
+static inline int sdw_nwrite(struct sdw_slave *slave, u32 addr, size_t count, const u8 *val)
+{
+	return 0;
+}
+
+static inline int sdw_nwrite_no_pm(struct sdw_slave *slave, u32 addr, size_t count, const u8 *val)
+{
+	return 0;
+}
+
+static inline int sdw_update(struct sdw_slave *slave, u32 addr, u8 mask, u8 val)
+{
+	return 0;
+}
+
+static inline int sdw_update_no_pm(struct sdw_slave *slave, u32 addr, u8 mask, u8 val)
+{
+	return 0;
+}
+
+#endif /* CONFIG_SOUNDWIRE */
 
 #endif /* __SOUNDWIRE_H */