| Message ID | 20220822153517.3747679-4-xu.yang_2@nxp.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | typec orientation switch support via mux controller | expand |
Hi Xu,
Thank you for the patch! Yet something to improve:
[auto build test ERROR on usb/usb-testing]
[also build test ERROR on shawnguo/for-next linus/master v6.0-rc2 next-20220822]
[cannot apply to robh/for-next]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Xu-Yang/typec-orientation-switch-support-via-mux-controller/20220822-153600
base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing
config: x86_64-rhel-8.3 (https://download.01.org/0day-ci/archive/20220822/202208221924.BfrOX4DZ-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-5) 11.3.0
reproduce (this is a W=1 build):
# https://github.com/intel-lab-lkp/linux/commit/703ba3cfec5b6f9422ac9a859bc6121f7c4a12fd
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review Xu-Yang/typec-orientation-switch-support-via-mux-controller/20220822-153600
git checkout 703ba3cfec5b6f9422ac9a859bc6121f7c4a12fd
# save the config file
mkdir build_dir && cp config build_dir/.config
make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash
If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@intel.com>
All errors (new ones prefixed by >>):
ld: drivers/usb/typec/mux.o: in function `typec_switch_put':
>> drivers/usb/typec/mux.c:200: undefined reference to `mux_control_put'
ld: drivers/usb/typec/mux.o: in function `typec_switch_set':
>> drivers/usb/typec/mux.c:286: undefined reference to `mux_control_deselect'
ld: drivers/usb/typec/mux.o: in function `mux_control_typec_switch_get':
>> drivers/usb/typec/mux.c:139: undefined reference to `mux_control_get'
ld: drivers/usb/typec/mux.o: in function `mux_control_select':
>> include/linux/mux/consumer.h:34: undefined reference to `mux_control_select_delay'
vim +200 drivers/usb/typec/mux.c
125
126 static struct typec_switch *mux_control_typec_switch_get(struct device *dev)
127 {
128 struct typec_switch *sw;
129 struct mux_control *mux;
130 int ret;
131
132 if (!device_property_present(dev, "mux-controls"))
133 return NULL;
134
135 sw = kzalloc(sizeof(*sw), GFP_KERNEL);
136 if (!sw)
137 return ERR_PTR(-ENOMEM);
138
> 139 mux = mux_control_get(dev, NULL);
140 if (!IS_ERR(mux)) {
141 sw->mux_switch = mux;
142 ret = device_property_read_u32_array(dev,
143 "typec-switch-states", sw->mux_states, 3);
144 if (ret) {
145 kfree(sw);
146 return ERR_PTR(ret);
147 }
148 } else {
149 kfree(sw);
150 return ERR_CAST(mux);
151 }
152
153 return sw;
154 }
155
156 /**
157 * typec_switch_get - Find USB Type-C orientation switch
158 * @dev: The device using switch
159 *
160 * Finds a switch used by @dev. Returns a reference to the switch on
161 * success, NULL if no matching connection was found, or
162 * ERR_PTR(-EPROBE_DEFER) when a connection was found but the switch
163 * has not been enumerated yet, or ERR_PTR with a negative errno.
164 */
165 struct typec_switch *typec_switch_get(struct device *dev)
166 {
167 struct typec_switch *sw;
168
169 sw = fwnode_typec_switch_get(dev_fwnode(dev));
170 if (!sw)
171 /* Try get switch based on mux control */
172 sw = mux_control_typec_switch_get(dev);
173
174 return sw;
175 }
176 EXPORT_SYMBOL_GPL(typec_switch_get);
177
178 /**
179 * typec_switch_put - Release USB Type-C orientation switch
180 * @sw: USB Type-C orientation switch
181 *
182 * Decrement reference count for @sw.
183 */
184 void typec_switch_put(struct typec_switch *sw)
185 {
186 struct typec_switch_dev *sw_dev;
187 unsigned int i;
188
189 if (IS_ERR_OR_NULL(sw))
190 return;
191
192 for (i = 0; i < sw->num_sw_devs; i++) {
193 sw_dev = sw->sw_devs[i];
194
195 module_put(sw_dev->dev.parent->driver->owner);
196 put_device(&sw_dev->dev);
197 }
198
199 if (sw->mux_switch)
> 200 mux_control_put(sw->mux_switch);
201
202 kfree(sw);
203 }
204 EXPORT_SYMBOL_GPL(typec_switch_put);
205
206 static void typec_switch_release(struct device *dev)
207 {
208 kfree(to_typec_switch_dev(dev));
209 }
210
211 const struct device_type typec_switch_dev_type = {
212 .name = "orientation_switch",
213 .release = typec_switch_release,
214 };
215
216 /**
217 * typec_switch_register - Register USB Type-C orientation switch
218 * @parent: Parent device
219 * @desc: Orientation switch description
220 *
221 * This function registers a switch that can be used for routing the correct
222 * data pairs depending on the cable plug orientation from the USB Type-C
223 * connector to the USB controllers. USB Type-C plugs can be inserted
224 * right-side-up or upside-down.
225 */
226 struct typec_switch_dev *
227 typec_switch_register(struct device *parent,
228 const struct typec_switch_desc *desc)
229 {
230 struct typec_switch_dev *sw_dev;
231 int ret;
232
233 if (!desc || !desc->set)
234 return ERR_PTR(-EINVAL);
235
236 sw_dev = kzalloc(sizeof(*sw_dev), GFP_KERNEL);
237 if (!sw_dev)
238 return ERR_PTR(-ENOMEM);
239
240 sw_dev->set = desc->set;
241
242 device_initialize(&sw_dev->dev);
243 sw_dev->dev.parent = parent;
244 sw_dev->dev.fwnode = desc->fwnode;
245 sw_dev->dev.class = &typec_mux_class;
246 sw_dev->dev.type = &typec_switch_dev_type;
247 sw_dev->dev.driver_data = desc->drvdata;
248 ret = dev_set_name(&sw_dev->dev, "%s-switch", desc->name ? desc->name : dev_name(parent));
249 if (ret) {
250 put_device(&sw_dev->dev);
251 return ERR_PTR(ret);
252 }
253
254 ret = device_add(&sw_dev->dev);
255 if (ret) {
256 dev_err(parent, "failed to register switch (%d)\n", ret);
257 put_device(&sw_dev->dev);
258 return ERR_PTR(ret);
259 }
260
261 return sw_dev;
262 }
263 EXPORT_SYMBOL_GPL(typec_switch_register);
264
265 int typec_switch_set(struct typec_switch *sw,
266 enum typec_orientation orientation)
267 {
268 struct typec_switch_dev *sw_dev;
269 struct mux_control *mux;
270 unsigned int i;
271 int ret;
272
273 if (IS_ERR_OR_NULL(sw))
274 return 0;
275
276 for (i = 0; i < sw->num_sw_devs; i++) {
277 sw_dev = sw->sw_devs[i];
278
279 ret = sw_dev->set(sw_dev, orientation);
280 if (ret)
281 return ret;
282 }
283
284 mux = sw->mux_switch;
285 if (mux) {
> 286 ret = mux_control_deselect(mux);
287 if (ret)
288 return ret;
289
290 ret = mux_control_select(mux, sw->mux_states[orientation]);
291 if (ret)
292 return ret;
293 }
294
295 return 0;
296 }
297 EXPORT_SYMBOL_GPL(typec_switch_set);
298
Hi Xu,
Thank you for the patch! Yet something to improve:
[auto build test ERROR on usb/usb-testing]
[also build test ERROR on shawnguo/for-next linus/master v6.0-rc2 next-20220822]
[cannot apply to robh/for-next]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Xu-Yang/typec-orientation-switch-support-via-mux-controller/20220822-153600
base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing
config: i386-randconfig-a013-20220822 (https://download.01.org/0day-ci/archive/20220822/202208222312.IFf74Ze6-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-5) 11.3.0
reproduce (this is a W=1 build):
# https://github.com/intel-lab-lkp/linux/commit/703ba3cfec5b6f9422ac9a859bc6121f7c4a12fd
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review Xu-Yang/typec-orientation-switch-support-via-mux-controller/20220822-153600
git checkout 703ba3cfec5b6f9422ac9a859bc6121f7c4a12fd
# save the config file
mkdir build_dir && cp config build_dir/.config
make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash
If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@intel.com>
All errors (new ones prefixed by >>):
ld: drivers/usb/typec/mux.o: in function `typec_switch_put':
>> mux.c:(.text+0x21d): undefined reference to `mux_control_put'
ld: drivers/usb/typec/mux.o: in function `typec_switch_set':
>> mux.c:(.text+0x29a): undefined reference to `mux_control_deselect'
>> ld: mux.c:(.text+0x2ab): undefined reference to `mux_control_select_delay'
ld: drivers/usb/typec/mux.o: in function `typec_switch_get':
>> mux.c:(.text+0x767): undefined reference to `mux_control_get'
> -----Original Message----- > From: kernel test robot <lkp@intel.com> > Sent: Monday, August 22, 2022 11:47 PM > To: Xu Yang <xu.yang_2@nxp.com>; heikki.krogerus@linux.intel.com; > robh+dt@kernel.org; peda@axentia.se; shawnguo@kernel.org > Cc: kbuild-all@lists.01.org; gregkh@linuxfoundation.org; linux@roeck-us.net; > Jun Li <jun.li@nxp.com>; Xu Yang <xu.yang_2@nxp.com>; linux- > usb@vger.kernel.org; dl-linux-imx <linux-imx@nxp.com>; > devicetree@vger.kernel.org; linux-arm-kernel@lists.infradead.org > Subject: [EXT] Re: [PATCH 3/4] usb: typec: mux: add typec orientation switch > support via mux controller > > Caution: EXT Email > > Hi Xu, > > Thank you for the patch! Yet something to improve: Thank you, test robot! I will fix it and submit a v2 for it. Xu Yang > > [auto build test ERROR on usb/usb-testing] [also build test ERROR on > shawnguo/for-next linus/master v6.0-rc2 next-20220822] [cannot apply to > robh/for-next] [If your patch is applied to the wrong git tree, kindly drop us a > note. > And when submitting patch, we suggest to use '--base' as documented in > https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgit- > scm.com%2Fdocs%2Fgit-format- > patch%23_base_tree_information&data=05%7C01%7Cxu.yang_2%40nx > p.com%7Cbfc9a4dc76fb43d05f7108da8455c2ab%7C686ea1d3bc2b4c6fa92cd9 > 9c5c301635%7C0%7C0%7C637967801123509493%7CUnknown%7CTWFpbGZs > b3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn > 0%3D%7C3000%7C%7C%7C&sdata=1F2u5Ljc%2FxLAOzsnN9945e%2FeRl > AVm5kMo1gLNbhUCjo%3D&reserved=0] > > url: > https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithu > b.com%2Fintel-lab-lkp%2Flinux%2Fcommits%2FXu-Yang%2Ftypec- > orientation-switch-support-via-mux-controller%2F20220822- > 153600&data=05%7C01%7Cxu.yang_2%40nxp.com%7Cbfc9a4dc76fb43d > 05f7108da8455c2ab%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C6 > 37967801123509493%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMD > AiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C > &sdata=f52r9hf0%2F5tfiSwZEjriijZ4da2XO7A8r8V9FjCRG%2BA%3D& > ;reserved=0 > base: > https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgit.ke > rnel.org%2Fpub%2Fscm%2Flinux%2Fkernel%2Fgit%2Fgregkh%2Fusb.git&am > p;data=05%7C01%7Cxu.yang_2%40nxp.com%7Cbfc9a4dc76fb43d05f7108da8 > 455c2ab%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C63796780112 > 3509493%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV > 2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata > =MDXVH0E9FZ4zZBJkVeG5KuWoUqxl7lVDIbtdLcayD6Q%3D&reserved= > 0 usb-testing > config: i386-randconfig-a013-20220822 > (https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdow > nload.01.org%2F0day-ci%2Farchive%2F20220822%2F202208222312.IFf74Ze6- > lkp%40intel.com%2Fconfig&data=05%7C01%7Cxu.yang_2%40nxp.com% > 7Cbfc9a4dc76fb43d05f7108da8455c2ab%7C686ea1d3bc2b4c6fa92cd99c5c3016 > 35%7C0%7C0%7C637967801123665718%7CUnknown%7CTWFpbGZsb3d8eyJ > WIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D% > 7C3000%7C%7C%7C&sdata=oZ%2FSbZ5Rp%2Bhj9l1x0fJPW1dIZ7p5ezqZ > Y4ouw8EpmC4%3D&reserved=0) > compiler: gcc-11 (Debian 11.3.0-5) 11.3.0 reproduce (this is a W=1 build): > # > https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithu > b.com%2Fintel-lab- > lkp%2Flinux%2Fcommit%2F703ba3cfec5b6f9422ac9a859bc6121f7c4a12fd&am > p;data=05%7C01%7Cxu.yang_2%40nxp.com%7Cbfc9a4dc76fb43d05f7108da8 > 455c2ab%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C63796780112 > 3665718%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV > 2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata > =6RJFht%2FkdfQ4domUP29WJC5m515k2RkAswDRQqwL85s%3D&reserv > ed=0 > git remote add linux-review > https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithu > b.com%2Fintel-lab- > lkp%2Flinux&data=05%7C01%7Cxu.yang_2%40nxp.com%7Cbfc9a4dc76f > b43d05f7108da8455c2ab%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0 > %7C637967801123665718%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjA > wMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C > %7C&sdata=wJeCdRdZ8UB0rHYQb1xEIlnOdqhJs53I%2BMM4%2FXvo8B > w%3D&reserved=0 > git fetch --no-tags linux-review Xu-Yang/typec-orientation-switch- > support-via-mux-controller/20220822-153600 > git checkout 703ba3cfec5b6f9422ac9a859bc6121f7c4a12fd > # save the config file > mkdir build_dir && cp config build_dir/.config > make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash > > If you fix the issue, kindly add following tag where applicable > Reported-by: kernel test robot <lkp@intel.com> > > All errors (new ones prefixed by >>): > > ld: drivers/usb/typec/mux.o: in function `typec_switch_put': > >> mux.c:(.text+0x21d): undefined reference to `mux_control_put' > ld: drivers/usb/typec/mux.o: in function `typec_switch_set': > >> mux.c:(.text+0x29a): undefined reference to `mux_control_deselect' > >> ld: mux.c:(.text+0x2ab): undefined reference to > `mux_control_select_delay' > ld: drivers/usb/typec/mux.o: in function `typec_switch_get': > >> mux.c:(.text+0x767): undefined reference to `mux_control_get' > > -- > 0-DAY CI Kernel Test Service > https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2F01.or > g%2Flkp&data=05%7C01%7Cxu.yang_2%40nxp.com%7Cbfc9a4dc76fb43 > d05f7108da8455c2ab%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C > 637967801123665718%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwM > DAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7 > C&sdata=915lo2yL7e5Zk0SBUqNX1TRvqNvAx3A2wCMVgho%2Fblk%3D > &reserved=0
Hi! 2022-08-22 at 17:35, Xu Yang wrote: > Some dedicated mux block can use existing mux controller as a mux > provider, typec port as a consumer to select channel for orientation > switch, this can be an alternate way to control typec orientation switch. > Also, one mux controller could cover highspeed, superspeed and sideband > use case one time in this implementation. > > Signed-off-by: Xu Yang <xu.yang_2@nxp.com> > --- > drivers/usb/typec/mux.c | 74 +++++++++++++++++++++++++++++++++++ > include/linux/usb/typec_mux.h | 7 +--- > 2 files changed, 76 insertions(+), 5 deletions(-) > > diff --git a/drivers/usb/typec/mux.c b/drivers/usb/typec/mux.c > index 464330776cd6..5ee960fb668d 100644 > --- a/drivers/usb/typec/mux.c > +++ b/drivers/usb/typec/mux.c > @@ -13,6 +13,7 @@ > #include <linux/mutex.h> > #include <linux/property.h> > #include <linux/slab.h> > +#include <linux/mux/consumer.h> > > #include "class.h" > #include "mux.h" > @@ -22,6 +23,11 @@ > struct typec_switch { > struct typec_switch_dev *sw_devs[TYPEC_MUX_MAX_DEVS]; > unsigned int num_sw_devs; > + > + /* Could handle HighSpeed, SuperSpeed, Sideband switch one time */ > + struct mux_control *mux_switch; > + /* 3 state correspond to NONE, NORMAL, REVERSE for all switches */ > + int mux_states[3]; > }; > > static int switch_fwnode_match(struct device *dev, const void *fwnode) > @@ -117,6 +123,58 @@ struct typec_switch *fwnode_typec_switch_get(struct fwnode_handle *fwnode) > } > EXPORT_SYMBOL_GPL(fwnode_typec_switch_get); > > +static struct typec_switch *mux_control_typec_switch_get(struct device *dev) > +{ > + struct typec_switch *sw; > + struct mux_control *mux; > + int ret; > + > + if (!device_property_present(dev, "mux-controls")) > + return NULL; > + > + sw = kzalloc(sizeof(*sw), GFP_KERNEL); > + if (!sw) > + return ERR_PTR(-ENOMEM); > + > + mux = mux_control_get(dev, NULL); > + if (!IS_ERR(mux)) { > + sw->mux_switch = mux; > + ret = device_property_read_u32_array(dev, > + "typec-switch-states", sw->mux_states, 3); > + if (ret) { > + kfree(sw); > + return ERR_PTR(ret); > + } > + } else { > + kfree(sw); > + return ERR_CAST(mux); > + } > + > + return sw; > +} > + > +/** > + * typec_switch_get - Find USB Type-C orientation switch > + * @dev: The device using switch > + * > + * Finds a switch used by @dev. Returns a reference to the switch on > + * success, NULL if no matching connection was found, or > + * ERR_PTR(-EPROBE_DEFER) when a connection was found but the switch > + * has not been enumerated yet, or ERR_PTR with a negative errno. > + */ > +struct typec_switch *typec_switch_get(struct device *dev) > +{ > + struct typec_switch *sw; > + > + sw = fwnode_typec_switch_get(dev_fwnode(dev)); > + if (!sw) > + /* Try get switch based on mux control */ > + sw = mux_control_typec_switch_get(dev); > + > + return sw; > +} > +EXPORT_SYMBOL_GPL(typec_switch_get); > + > /** > * typec_switch_put - Release USB Type-C orientation switch > * @sw: USB Type-C orientation switch > @@ -137,6 +195,10 @@ void typec_switch_put(struct typec_switch *sw) > module_put(sw_dev->dev.parent->driver->owner); > put_device(&sw_dev->dev); > } > + > + if (sw->mux_switch) > + mux_control_put(sw->mux_switch); > + > kfree(sw); > } > EXPORT_SYMBOL_GPL(typec_switch_put); > @@ -204,6 +266,7 @@ int typec_switch_set(struct typec_switch *sw, > enum typec_orientation orientation) > { > struct typec_switch_dev *sw_dev; > + struct mux_control *mux; > unsigned int i; > int ret; > > @@ -218,6 +281,17 @@ int typec_switch_set(struct typec_switch *sw, > return ret; > } > > + mux = sw->mux_switch; > + if (mux) { > + ret = mux_control_deselect(mux); This is broken. Please read the documentation for mux_control_select and mux_control_deselect. Every call to mux_control_deselect *must* be paired with a *successful* call to mux_control_select. Here, mux_control_deselect is called unconditionally (as long as a mux is configured). Yes, agreed, that is indeed awkward (and fragile). But those are the rules. (the mux interface was not designed for long-time selects like this) Cheers, Peter > + if (ret) > + return ret; > + > + ret = mux_control_select(mux, sw->mux_states[orientation]); > + if (ret) > + return ret; > + } > + > return 0; > } > EXPORT_SYMBOL_GPL(typec_switch_set); > diff --git a/include/linux/usb/typec_mux.h b/include/linux/usb/typec_mux.h > index 9292f0e07846..2287e5a5f591 100644 > --- a/include/linux/usb/typec_mux.h > +++ b/include/linux/usb/typec_mux.h > @@ -24,16 +24,13 @@ struct typec_switch_desc { > void *drvdata; > }; > > + > +struct typec_switch *typec_switch_get(struct device *dev); > struct typec_switch *fwnode_typec_switch_get(struct fwnode_handle *fwnode); > void typec_switch_put(struct typec_switch *sw); > int typec_switch_set(struct typec_switch *sw, > enum typec_orientation orientation); > > -static inline struct typec_switch *typec_switch_get(struct device *dev) > -{ > - return fwnode_typec_switch_get(dev_fwnode(dev)); > -} > - > struct typec_switch_dev * > typec_switch_register(struct device *parent, > const struct typec_switch_desc *desc);
Hi Peter, > -----Original Message----- > From: Peter Rosin <peda@axentia.se> > Sent: Tuesday, August 23, 2022 2:13 PM > To: Xu Yang <xu.yang_2@nxp.com>; heikki.krogerus@linux.intel.com; > robh+dt@kernel.org; shawnguo@kernel.org > Cc: gregkh@linuxfoundation.org; linux@roeck-us.net; Jun Li > <jun.li@nxp.com>; linux-usb@vger.kernel.org; dl-linux-imx <linux- > imx@nxp.com>; devicetree@vger.kernel.org; linux-arm- > kernel@lists.infradead.org > Subject: [EXT] Re: [PATCH 3/4] usb: typec: mux: add typec orientation switch > support via mux controller > > Caution: EXT Email > > Hi! > > 2022-08-22 at 17:35, Xu Yang wrote: > > Some dedicated mux block can use existing mux controller as a mux > > provider, typec port as a consumer to select channel for orientation > > switch, this can be an alternate way to control typec orientation switch. > > Also, one mux controller could cover highspeed, superspeed and sideband > > use case one time in this implementation. > > > > Signed-off-by: Xu Yang <xu.yang_2@nxp.com> > > --- > > drivers/usb/typec/mux.c | 74 > +++++++++++++++++++++++++++++++++++ > > include/linux/usb/typec_mux.h | 7 +--- > > 2 files changed, 76 insertions(+), 5 deletions(-) > > > > diff --git a/drivers/usb/typec/mux.c b/drivers/usb/typec/mux.c > > index 464330776cd6..5ee960fb668d 100644 > > --- a/drivers/usb/typec/mux.c > > +++ b/drivers/usb/typec/mux.c > > @@ -13,6 +13,7 @@ > > #include <linux/mutex.h> > > #include <linux/property.h> > > #include <linux/slab.h> > > +#include <linux/mux/consumer.h> > > > > #include "class.h" > > #include "mux.h" > > @@ -22,6 +23,11 @@ > > struct typec_switch { > > struct typec_switch_dev *sw_devs[TYPEC_MUX_MAX_DEVS]; > > unsigned int num_sw_devs; > > + > > + /* Could handle HighSpeed, SuperSpeed, Sideband switch one time */ > > + struct mux_control *mux_switch; > > + /* 3 state correspond to NONE, NORMAL, REVERSE for all switches */ > > + int mux_states[3]; > > }; > > > > static int switch_fwnode_match(struct device *dev, const void *fwnode) > > @@ -117,6 +123,58 @@ struct typec_switch > *fwnode_typec_switch_get(struct fwnode_handle *fwnode) > > } > > EXPORT_SYMBOL_GPL(fwnode_typec_switch_get); > > > > +static struct typec_switch *mux_control_typec_switch_get(struct device > *dev) > > +{ > > + struct typec_switch *sw; > > + struct mux_control *mux; > > + int ret; > > + > > + if (!device_property_present(dev, "mux-controls")) > > + return NULL; > > + > > + sw = kzalloc(sizeof(*sw), GFP_KERNEL); > > + if (!sw) > > + return ERR_PTR(-ENOMEM); > > + > > + mux = mux_control_get(dev, NULL); > > + if (!IS_ERR(mux)) { > > + sw->mux_switch = mux; > > + ret = device_property_read_u32_array(dev, > > + "typec-switch-states", sw->mux_states, 3); > > + if (ret) { > > + kfree(sw); > > + return ERR_PTR(ret); > > + } > > + } else { > > + kfree(sw); > > + return ERR_CAST(mux); > > + } > > + > > + return sw; > > +} > > + > > +/** > > + * typec_switch_get - Find USB Type-C orientation switch > > + * @dev: The device using switch > > + * > > + * Finds a switch used by @dev. Returns a reference to the switch on > > + * success, NULL if no matching connection was found, or > > + * ERR_PTR(-EPROBE_DEFER) when a connection was found but the > switch > > + * has not been enumerated yet, or ERR_PTR with a negative errno. > > + */ > > +struct typec_switch *typec_switch_get(struct device *dev) > > +{ > > + struct typec_switch *sw; > > + > > + sw = fwnode_typec_switch_get(dev_fwnode(dev)); > > + if (!sw) > > + /* Try get switch based on mux control */ > > + sw = mux_control_typec_switch_get(dev); > > + > > + return sw; > > +} > > +EXPORT_SYMBOL_GPL(typec_switch_get); > > + > > /** > > * typec_switch_put - Release USB Type-C orientation switch > > * @sw: USB Type-C orientation switch > > @@ -137,6 +195,10 @@ void typec_switch_put(struct typec_switch *sw) > > module_put(sw_dev->dev.parent->driver->owner); > > put_device(&sw_dev->dev); > > } > > + > > + if (sw->mux_switch) > > + mux_control_put(sw->mux_switch); > > + > > kfree(sw); > > } > > EXPORT_SYMBOL_GPL(typec_switch_put); > > @@ -204,6 +266,7 @@ int typec_switch_set(struct typec_switch *sw, > > enum typec_orientation orientation) > > { > > struct typec_switch_dev *sw_dev; > > + struct mux_control *mux; > > unsigned int i; > > int ret; > > > > @@ -218,6 +281,17 @@ int typec_switch_set(struct typec_switch *sw, > > return ret; > > } > > > > + mux = sw->mux_switch; > > + if (mux) { > > + ret = mux_control_deselect(mux); > > This is broken. Please read the documentation for mux_control_select and > mux_control_deselect. Every call to mux_control_deselect *must* be paired > with a *successful* call to mux_control_select. Here, mux_control_deselect > is called unconditionally (as long as a mux is configured). Okay, I will improve it in v2. > > Yes, agreed, that is indeed awkward (and fragile). But those are the rules. > (the mux interface was not designed for long-time selects like this) > Understood. I'll follow the rules. Thanks, Xu Yang > Cheers, > Peter > > > + if (ret) > > + return ret; > > + > > + ret = mux_control_select(mux, sw->mux_states[orientation]); > > + if (ret) > > + return ret; > > + } > > + > > return 0; > > } > > EXPORT_SYMBOL_GPL(typec_switch_set); > > diff --git a/include/linux/usb/typec_mux.h > b/include/linux/usb/typec_mux.h > > index 9292f0e07846..2287e5a5f591 100644 > > --- a/include/linux/usb/typec_mux.h > > +++ b/include/linux/usb/typec_mux.h > > @@ -24,16 +24,13 @@ struct typec_switch_desc { > > void *drvdata; > > }; > > > > + > > +struct typec_switch *typec_switch_get(struct device *dev); > > struct typec_switch *fwnode_typec_switch_get(struct fwnode_handle > *fwnode); > > void typec_switch_put(struct typec_switch *sw); > > int typec_switch_set(struct typec_switch *sw, > > enum typec_orientation orientation); > > > > -static inline struct typec_switch *typec_switch_get(struct device *dev) > > -{ > > - return fwnode_typec_switch_get(dev_fwnode(dev)); > > -} > > - > > struct typec_switch_dev * > > typec_switch_register(struct device *parent, > > const struct typec_switch_desc *desc);
diff --git a/drivers/usb/typec/mux.c b/drivers/usb/typec/mux.c index 464330776cd6..5ee960fb668d 100644 --- a/drivers/usb/typec/mux.c +++ b/drivers/usb/typec/mux.c @@ -13,6 +13,7 @@ #include <linux/mutex.h> #include <linux/property.h> #include <linux/slab.h> +#include <linux/mux/consumer.h> #include "class.h" #include "mux.h" @@ -22,6 +23,11 @@ struct typec_switch { struct typec_switch_dev *sw_devs[TYPEC_MUX_MAX_DEVS]; unsigned int num_sw_devs; + + /* Could handle HighSpeed, SuperSpeed, Sideband switch one time */ + struct mux_control *mux_switch; + /* 3 state correspond to NONE, NORMAL, REVERSE for all switches */ + int mux_states[3]; }; static int switch_fwnode_match(struct device *dev, const void *fwnode) @@ -117,6 +123,58 @@ struct typec_switch *fwnode_typec_switch_get(struct fwnode_handle *fwnode) } EXPORT_SYMBOL_GPL(fwnode_typec_switch_get); +static struct typec_switch *mux_control_typec_switch_get(struct device *dev) +{ + struct typec_switch *sw; + struct mux_control *mux; + int ret; + + if (!device_property_present(dev, "mux-controls")) + return NULL; + + sw = kzalloc(sizeof(*sw), GFP_KERNEL); + if (!sw) + return ERR_PTR(-ENOMEM); + + mux = mux_control_get(dev, NULL); + if (!IS_ERR(mux)) { + sw->mux_switch = mux; + ret = device_property_read_u32_array(dev, + "typec-switch-states", sw->mux_states, 3); + if (ret) { + kfree(sw); + return ERR_PTR(ret); + } + } else { + kfree(sw); + return ERR_CAST(mux); + } + + return sw; +} + +/** + * typec_switch_get - Find USB Type-C orientation switch + * @dev: The device using switch + * + * Finds a switch used by @dev. Returns a reference to the switch on + * success, NULL if no matching connection was found, or + * ERR_PTR(-EPROBE_DEFER) when a connection was found but the switch + * has not been enumerated yet, or ERR_PTR with a negative errno. + */ +struct typec_switch *typec_switch_get(struct device *dev) +{ + struct typec_switch *sw; + + sw = fwnode_typec_switch_get(dev_fwnode(dev)); + if (!sw) + /* Try get switch based on mux control */ + sw = mux_control_typec_switch_get(dev); + + return sw; +} +EXPORT_SYMBOL_GPL(typec_switch_get); + /** * typec_switch_put - Release USB Type-C orientation switch * @sw: USB Type-C orientation switch @@ -137,6 +195,10 @@ void typec_switch_put(struct typec_switch *sw) module_put(sw_dev->dev.parent->driver->owner); put_device(&sw_dev->dev); } + + if (sw->mux_switch) + mux_control_put(sw->mux_switch); + kfree(sw); } EXPORT_SYMBOL_GPL(typec_switch_put); @@ -204,6 +266,7 @@ int typec_switch_set(struct typec_switch *sw, enum typec_orientation orientation) { struct typec_switch_dev *sw_dev; + struct mux_control *mux; unsigned int i; int ret; @@ -218,6 +281,17 @@ int typec_switch_set(struct typec_switch *sw, return ret; } + mux = sw->mux_switch; + if (mux) { + ret = mux_control_deselect(mux); + if (ret) + return ret; + + ret = mux_control_select(mux, sw->mux_states[orientation]); + if (ret) + return ret; + } + return 0; } EXPORT_SYMBOL_GPL(typec_switch_set); diff --git a/include/linux/usb/typec_mux.h b/include/linux/usb/typec_mux.h index 9292f0e07846..2287e5a5f591 100644 --- a/include/linux/usb/typec_mux.h +++ b/include/linux/usb/typec_mux.h @@ -24,16 +24,13 @@ struct typec_switch_desc { void *drvdata; }; + +struct typec_switch *typec_switch_get(struct device *dev); struct typec_switch *fwnode_typec_switch_get(struct fwnode_handle *fwnode); void typec_switch_put(struct typec_switch *sw); int typec_switch_set(struct typec_switch *sw, enum typec_orientation orientation); -static inline struct typec_switch *typec_switch_get(struct device *dev) -{ - return fwnode_typec_switch_get(dev_fwnode(dev)); -} - struct typec_switch_dev * typec_switch_register(struct device *parent, const struct typec_switch_desc *desc);
Some dedicated mux block can use existing mux controller as a mux provider, typec port as a consumer to select channel for orientation switch, this can be an alternate way to control typec orientation switch. Also, one mux controller could cover highspeed, superspeed and sideband use case one time in this implementation. Signed-off-by: Xu Yang <xu.yang_2@nxp.com> --- drivers/usb/typec/mux.c | 74 +++++++++++++++++++++++++++++++++++ include/linux/usb/typec_mux.h | 7 +--- 2 files changed, 76 insertions(+), 5 deletions(-)