| Message ID | 20220706171601.807042-7-pmalani@chromium.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | platform/chrome: Type-C switch driver and Type-C framework updates | expand |
Hi Prashant,
I love your patch! Perhaps something to improve:
[auto build test WARNING on usb/usb-testing]
[cannot apply to chrome-platform/for-next linus/master balbi-usb/testing/next peter-chen-usb/for-usb-next v5.19-rc5]
[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/Prashant-Malani/platform-chrome-Type-C-switch-driver-and-Type-C-framework-updates/20220707-012614
base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing
config: i386-allyesconfig (https://download.01.org/0day-ci/archive/20220707/202207071256.63ElDHIG-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-3) 11.3.0
reproduce (this is a W=1 build):
# https://github.com/intel-lab-lkp/linux/commit/60e03c1b36c0e3533e481b44152faab38448be5b
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review Prashant-Malani/platform-chrome-Type-C-switch-driver-and-Type-C-framework-updates/20220707-012614
git checkout 60e03c1b36c0e3533e481b44152faab38448be5b
# save the config file
mkdir build_dir && cp config build_dir/.config
make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash drivers/platform/chrome/ kernel/bpf/
If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@intel.com>
All warnings (new ones prefixed by >>):
>> drivers/platform/chrome/cros_typec_switch.c:81:6: warning: no previous prototype for 'cros_typec_check_event' [-Wmissing-prototypes]
81 | bool cros_typec_check_event(struct cros_typec_switch_data *sdata, int port_num, u32 mask)
| ^~~~~~~~~~~~~~~~~~~~~~
drivers/platform/chrome/cros_typec_switch.c:159:6: warning: no previous prototype for 'cros_typec_unregister_switches' [-Wmissing-prototypes]
159 | void cros_typec_unregister_switches(struct cros_typec_switch_data *sdata)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/platform/chrome/cros_typec_switch.c:170:5: warning: no previous prototype for 'cros_typec_register_retimer' [-Wmissing-prototypes]
170 | int cros_typec_register_retimer(struct cros_typec_port *port, struct fwnode_handle *fwnode)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~
vim +/cros_typec_check_event +81 drivers/platform/chrome/cros_typec_switch.c
80
> 81 bool cros_typec_check_event(struct cros_typec_switch_data *sdata, int port_num, u32 mask)
82 {
83 struct ec_response_typec_status resp;
84 struct ec_params_typec_status req = {
85 .port = port_num,
86 };
87 int ret;
88
89 ret = cros_ec_command(sdata->ec, 0, EC_CMD_TYPEC_STATUS, &req, sizeof(req),
90 &resp, sizeof(resp));
91 if (ret < 0) {
92 dev_warn(sdata->dev, "EC_CMD_TYPEC_STATUS failed for port: %d\n", port_num);
93 return false;
94 }
95
96 if (resp.events & mask)
97 return true;
98
99 return false;
100 }
101
On Wed, Jul 6, 2022 at 9:26 PM kernel test robot <lkp@intel.com> wrote: > > Hi Prashant, > > I love your patch! Perhaps something to improve: > > [auto build test WARNING on usb/usb-testing] > [cannot apply to chrome-platform/for-next linus/master balbi-usb/testing/next peter-chen-usb/for-usb-next v5.19-rc5] > [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/Prashant-Malani/platform-chrome-Type-C-switch-driver-and-Type-C-framework-updates/20220707-012614 > base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing > config: i386-allyesconfig (https://download.01.org/0day-ci/archive/20220707/202207071256.63ElDHIG-lkp@intel.com/config) > compiler: gcc-11 (Debian 11.3.0-3) 11.3.0 > reproduce (this is a W=1 build): > # https://github.com/intel-lab-lkp/linux/commit/60e03c1b36c0e3533e481b44152faab38448be5b > git remote add linux-review https://github.com/intel-lab-lkp/linux > git fetch --no-tags linux-review Prashant-Malani/platform-chrome-Type-C-switch-driver-and-Type-C-framework-updates/20220707-012614 > git checkout 60e03c1b36c0e3533e481b44152faab38448be5b > # save the config file > mkdir build_dir && cp config build_dir/.config > make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash drivers/platform/chrome/ kernel/bpf/ > > If you fix the issue, kindly add following tag where applicable > Reported-by: kernel test robot <lkp@intel.com> > > All warnings (new ones prefixed by >>): > > >> drivers/platform/chrome/cros_typec_switch.c:81:6: warning: no previous prototype for 'cros_typec_check_event' [-Wmissing-prototypes] > 81 | bool cros_typec_check_event(struct cros_typec_switch_data *sdata, int port_num, u32 mask) > | ^~~~~~~~~~~~~~~~~~~~~~ > drivers/platform/chrome/cros_typec_switch.c:159:6: warning: no previous prototype for 'cros_typec_unregister_switches' [-Wmissing-prototypes] > 159 | void cros_typec_unregister_switches(struct cros_typec_switch_data *sdata) > | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > drivers/platform/chrome/cros_typec_switch.c:170:5: warning: no previous prototype for 'cros_typec_register_retimer' [-Wmissing-prototypes] > 170 | int cros_typec_register_retimer(struct cros_typec_port *port, struct fwnode_handle *fwnode) > | ^~~~~~~~~~~~~~~~~~~~~~~~~~~ I'll fix these warnings and send out a v3. Apologies for the churn. -Prashant
diff --git a/drivers/platform/chrome/cros_typec_switch.c b/drivers/platform/chrome/cros_typec_switch.c index 9faa442dd81a..a226f828514f 100644 --- a/drivers/platform/chrome/cros_typec_switch.c +++ b/drivers/platform/chrome/cros_typec_switch.c @@ -7,6 +7,8 @@ */ #include <linux/acpi.h> +#include <linux/delay.h> +#include <linux/jiffies.h> #include <linux/module.h> #include <linux/platform_data/cros_ec_commands.h> #include <linux/platform_data/cros_ec_proto.h> @@ -63,6 +65,40 @@ static int cros_typec_get_mux_state(unsigned long mode, struct typec_altmode *al return ret; } +static int cros_typec_send_clear_event(struct cros_typec_switch_data *sdata, int port_num, + u32 events_mask) +{ + struct ec_params_typec_control req = { + .port = port_num, + .command = TYPEC_CONTROL_COMMAND_CLEAR_EVENTS, + .clear_events_mask = events_mask, + }; + + return cros_ec_command(sdata->ec, 0, EC_CMD_TYPEC_CONTROL, &req, + sizeof(req), NULL, 0); +} + +bool cros_typec_check_event(struct cros_typec_switch_data *sdata, int port_num, u32 mask) +{ + struct ec_response_typec_status resp; + struct ec_params_typec_status req = { + .port = port_num, + }; + int ret; + + ret = cros_ec_command(sdata->ec, 0, EC_CMD_TYPEC_STATUS, &req, sizeof(req), + &resp, sizeof(resp)); + if (ret < 0) { + dev_warn(sdata->dev, "EC_CMD_TYPEC_STATUS failed for port: %d\n", port_num); + return false; + } + + if (resp.events & mask) + return true; + + return false; +} + /* * The Chrome EC treats both mode-switches and retimers as "muxes" for the purposes of the * host command API. This common function configures and verifies the retimer/mode-switch @@ -71,12 +107,44 @@ static int cros_typec_get_mux_state(unsigned long mode, struct typec_altmode *al static int cros_typec_configure_mux(struct cros_typec_switch_data *sdata, int port_num, int index, unsigned long mode, struct typec_altmode *alt) { - int ret = cros_typec_get_mux_state(mode, alt); + unsigned long end; + u32 event_mask; + u8 mux_state; + int ret; + + ret = cros_typec_get_mux_state(mode, alt); + if (ret < 0) + return ret; + mux_state = (u8)ret; + /* Clear any old mux set done event. */ + if (index == 0) + event_mask = PD_STATUS_EVENT_MUX_0_SET_DONE; + else + event_mask = PD_STATUS_EVENT_MUX_1_SET_DONE; + + ret = cros_typec_send_clear_event(sdata, port_num, event_mask); + if (ret < 0) + return ret; + + /* Send the set command. */ + ret = cros_typec_cmd_mux_set(sdata, port_num, index, mux_state); if (ret < 0) return ret; - return cros_typec_cmd_mux_set(sdata, port_num, index, (u8)ret); + /* Check for the mux set done event. */ + end = jiffies + msecs_to_jiffies(1000); + do { + if (cros_typec_check_event(sdata, port_num, event_mask)) + return 0; + + usleep_range(500, 1000); + } while (time_before(jiffies, end)); + + dev_err(sdata->dev, "Timed out waiting for mux set done on index: %d, state: %d\n", + index, mux_state); + + return -ETIMEDOUT; } static int
The Chrome EC updates Type-C status events when mux set requests from the Application Processor (AP) are completed. Add a check to the flow of configuring muxes to look for this status done bit, so that the driver is aware that the mux set completed successfully or not. Signed-off-by: Prashant Malani <pmalani@chromium.org> --- Changes since v1: - No changes. drivers/platform/chrome/cros_typec_switch.c | 72 ++++++++++++++++++++- 1 file changed, 70 insertions(+), 2 deletions(-)