* [Linux-kernel-mentees] [PATCH 0/1] Implement a DVB Dummy Tuner @ 2020-01-09 15:24 Daniel W. S. Almeida 2020-01-09 15:24 ` [Linux-kernel-mentees] [PATCH 1/1] media: dvb_dummy_tuner: implement driver skeleton Daniel W. S. Almeida 2020-01-09 16:07 ` [Linux-kernel-mentees] [PATCH 0/1] Implement a DVB Dummy Tuner Mauro Carvalho Chehab 0 siblings, 2 replies; 11+ messages in thread From: Daniel W. S. Almeida @ 2020-01-09 15:24 UTC (permalink / raw) To: mchehab, sean, tglx, gregkh Cc: linux-kernel, linux-kernel-mentees, Daniel W. S. Almeida, linux-media From: "Daniel W. S. Almeida" <dwlsalmeida@gmail.com> This patch series should implement a dummy DVB tuner as part of ongoing work on a virtual DVB test driver under the 2020 Spring Linux Kernel Mentorship Program. as Daniel W. S. Almeida (1): media: dvb_dummy_tuner: implement driver skeleton drivers/media/tuners/Kconfig | 7 ++ drivers/media/tuners/Makefile | 1 + drivers/media/tuners/dvb_dummy_tuner.c | 153 +++++++++++++++++++++++++ drivers/media/tuners/dvb_dummy_tuner.h | 20 ++++ 4 files changed, 181 insertions(+) create mode 100644 drivers/media/tuners/dvb_dummy_tuner.c create mode 100644 drivers/media/tuners/dvb_dummy_tuner.h -- 2.24.1 _______________________________________________ Linux-kernel-mentees mailing list Linux-kernel-mentees@lists.linuxfoundation.org https://lists.linuxfoundation.org/mailman/listinfo/linux-kernel-mentees ^ permalink raw reply [flat|nested] 11+ messages in thread
* [Linux-kernel-mentees] [PATCH 1/1] media: dvb_dummy_tuner: implement driver skeleton 2020-01-09 15:24 [Linux-kernel-mentees] [PATCH 0/1] Implement a DVB Dummy Tuner Daniel W. S. Almeida @ 2020-01-09 15:24 ` Daniel W. S. Almeida 2020-01-09 15:54 ` Greg KH ` (2 more replies) 2020-01-09 16:07 ` [Linux-kernel-mentees] [PATCH 0/1] Implement a DVB Dummy Tuner Mauro Carvalho Chehab 1 sibling, 3 replies; 11+ messages in thread From: Daniel W. S. Almeida @ 2020-01-09 15:24 UTC (permalink / raw) To: mchehab, sean, tglx, gregkh Cc: linux-kernel, linux-kernel-mentees, Daniel W. S. Almeida, linux-media From: "Daniel W. S. Almeida" <dwlsalmeida@gmail.com> Implement the skeleton for the tuner driver in a separate file. Signed-off-by: Daniel W. S. Almeida <dwlsalmeida@gmail.com> --- drivers/media/tuners/Kconfig | 7 ++ drivers/media/tuners/Makefile | 1 + drivers/media/tuners/dvb_dummy_tuner.c | 153 +++++++++++++++++++++++++ drivers/media/tuners/dvb_dummy_tuner.h | 20 ++++ 4 files changed, 181 insertions(+) create mode 100644 drivers/media/tuners/dvb_dummy_tuner.c create mode 100644 drivers/media/tuners/dvb_dummy_tuner.h diff --git a/drivers/media/tuners/Kconfig b/drivers/media/tuners/Kconfig index e104bb7766e1..efa1591fe0ae 100644 --- a/drivers/media/tuners/Kconfig +++ b/drivers/media/tuners/Kconfig @@ -296,4 +296,11 @@ config MEDIA_TUNER_QM1D1B0004 default m if !MEDIA_SUBDRV_AUTOSELECT help Sharp QM1D1B0004 ISDB-S tuner driver. + +config MEDIA_TUNER_DVB_DUMMY_TUNER + tristate "Dummy tuner" + depends on MEDIA_SUPPORT && I2C + default m if !MEDIA_SUBDRV_AUTOSELECT + help + Dummy tuner driver for common TV standards. endmenu diff --git a/drivers/media/tuners/Makefile b/drivers/media/tuners/Makefile index 7b4f8423501e..f98de1cf2e19 100644 --- a/drivers/media/tuners/Makefile +++ b/drivers/media/tuners/Makefile @@ -44,5 +44,6 @@ obj-$(CONFIG_MEDIA_TUNER_QM1D1C0042) += qm1d1c0042.o obj-$(CONFIG_MEDIA_TUNER_QM1D1B0004) += qm1d1b0004.o obj-$(CONFIG_MEDIA_TUNER_M88RS6000T) += m88rs6000t.o obj-$(CONFIG_MEDIA_TUNER_TDA18250) += tda18250.o +obj-$(CONFIG_MEDIA_TUNER_DVB_DUMMY_TUNER) += dvb_dummy_tuner.o ccflags-y += -I$(srctree)/drivers/media/dvb-frontends diff --git a/drivers/media/tuners/dvb_dummy_tuner.c b/drivers/media/tuners/dvb_dummy_tuner.c new file mode 100644 index 000000000000..63d2e47d4739 --- /dev/null +++ b/drivers/media/tuners/dvb_dummy_tuner.c @@ -0,0 +1,153 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Driver for Dummy Frontend + * + * Written by Daniel W. S. Almeida <dwlsalmeida@gmail.com> + */ + +#include <linux/errno.h> +#include <linux/i2c.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/types.h> +#include <media/dvb_frontend.h> +#include "dvb_dummy_tuner.h" + +struct dvb_dummy_tuner_dev { + struct dvb_frontend *fe; +}; + +static void dvb_dummy_tuner_release(struct dvb_frontend *fe) +{ +} + +static int dvb_dummy_tuner_init(struct dvb_frontend *fe) +{ + return 0; +} + +static int dvb_dummy_tuner_sleep(struct dvb_frontend *fe) +{ + return 0; +} + +static int dvb_dummy_tuner_suspend(struct dvb_frontend *fe) +{ + return 0; +} + +static int dvb_dummy_tuner_resume(struct dvb_frontend *fe) +{ + return 0; +} + +static int dvb_dummy_tuner_set_params(struct dvb_frontend *fe) +{ + return 0; +} + +static int dvb_dummy_tuner_set_config(struct dvb_frontend *fe, void *priv_cfg) +{ + return 0; +} + +static int dvb_dummy_tuner_get_frequency(struct dvb_frontend *fe, + u32 *frequency) +{ + return 0; +} + +static int dvb_dummy_tuner_get_bandwidth(struct dvb_frontend *fe, + u32 *bandwidth) +{ + return 0; +} + +static int dvb_dummy_tuner_get_if_frequency(struct dvb_frontend *fe, + u32 *frequency) +{ + return 0; +} + +static int dvb_dummy_tuner_get_status(struct dvb_frontend *fe, u32 *status) +{ + return 0; +} + +static const struct dvb_tuner_ops dvb_dummy_tuner_ops = { + .release = dvb_dummy_tuner_release, + .init = dvb_dummy_tuner_init, + .sleep = dvb_dummy_tuner_sleep, + .suspend = dvb_dummy_tuner_suspend, + .resume = dvb_dummy_tuner_resume, + .set_params = dvb_dummy_tuner_set_params, + .set_config = dvb_dummy_tuner_set_config, + .get_bandwidth = dvb_dummy_tuner_get_bandwidth, + .get_frequency = dvb_dummy_tuner_get_frequency, + .get_if_frequency = dvb_dummy_tuner_get_if_frequency, + .get_status = dvb_dummy_tuner_get_status, +}; + +static const struct i2c_device_id dvb_dummy_tuner_i2c_id_table[] = { + {"dvb_dummy_tuner", 0}, + {} +}; +MODULE_DEVICE_TABLE(i2c, dvb_dummy_tuner_i2c_id_table); + +static int dvb_dummy_tuner_i2c_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + int ret = 0; + struct dvb_dummy_tuner_config *config = client->dev.platform_data; + struct dvb_frontend *fe = config->fe; + struct dvb_dummy_tuner_dev *tuner_dev = NULL; + + tuner_dev = kzalloc(sizeof(*tuner_dev), GFP_KERNEL); + if (!tuner_dev) { + ret = -ENOMEM; + goto err; + } + + i2c_set_clientdata(client, tuner_dev); + tuner_dev->fe = config->fe; + + memcpy(&fe->ops.tuner_ops, + &dvb_dummy_tuner_ops, + sizeof(struct dvb_tuner_ops)); + + fe->tuner_priv = client; + + pr_debug("%s: Successfully probed %s\n", __func__, client->name); + return ret; + +err: + pr_err("%s: failed\n", __func__); + return ret; +} + +static int dvb_dummy_tuner_i2c_remove(struct i2c_client *client) +{ + struct dvb_dummy_tuner_dev *tuner_dev = i2c_get_clientdata(client); + struct dvb_frontend *fe = tuner_dev->fe; + + memset(&fe->ops.tuner_ops, 0, sizeof(struct dvb_tuner_ops)); + fe->tuner_priv = NULL; + kfree(tuner_dev); + + return 0; +} + +static struct i2c_driver dvb_dummy_tuner_i2c_driver = { + .driver = { + .name = "dvb_dummy_tuner", + .suppress_bind_attrs = true, + }, + .probe = dvb_dummy_tuner_i2c_probe, + .remove = dvb_dummy_tuner_i2c_remove, + .id_table = dvb_dummy_tuner_i2c_id_table, +}; +module_i2c_driver(dvb_dummy_tuner_i2c_driver); + +MODULE_DESCRIPTION("DVB Dummy Tuner"); +MODULE_AUTHOR("Daniel W. S. Almeida"); +MODULE_LICENSE("GPL"); diff --git a/drivers/media/tuners/dvb_dummy_tuner.h b/drivers/media/tuners/dvb_dummy_tuner.h new file mode 100644 index 000000000000..fde7628258fa --- /dev/null +++ b/drivers/media/tuners/dvb_dummy_tuner.h @@ -0,0 +1,20 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * DVB Dummy Tuner + * + */ +#ifndef __TUNER_DVB_DUMMY_TUNER_H__ +#define __TUNER_DVB_DUMMY_TUNER_H__ + +#include <media/dvb_frontend.h> +/** + * struct dvb_dummy_tuner_config - configuration parameters for the dummy tuner + * + * @fe: + * frontend returned by driver + */ +struct dvb_dummy_tuner_config { + struct dvb_frontend *fe; +}; + +#endif /*__TUNER_DVB_DUMMY_TUNER_H__ */ -- 2.24.1 _______________________________________________ Linux-kernel-mentees mailing list Linux-kernel-mentees@lists.linuxfoundation.org https://lists.linuxfoundation.org/mailman/listinfo/linux-kernel-mentees ^ permalink raw reply related [flat|nested] 11+ messages in thread
* Re: [Linux-kernel-mentees] [PATCH 1/1] media: dvb_dummy_tuner: implement driver skeleton 2020-01-09 15:24 ` [Linux-kernel-mentees] [PATCH 1/1] media: dvb_dummy_tuner: implement driver skeleton Daniel W. S. Almeida @ 2020-01-09 15:54 ` Greg KH 2020-01-09 20:43 ` Daniel W. S. Almeida 2020-01-09 16:13 ` Mauro Carvalho Chehab 2020-01-09 16:45 ` Shuah Khan 2 siblings, 1 reply; 11+ messages in thread From: Greg KH @ 2020-01-09 15:54 UTC (permalink / raw) To: Daniel W. S. Almeida Cc: sean, linux-kernel, tglx, mchehab, linux-kernel-mentees, linux-media On Thu, Jan 09, 2020 at 12:24:08PM -0300, Daniel W. S. Almeida wrote: > +static int dvb_dummy_tuner_i2c_probe(struct i2c_client *client, > + const struct i2c_device_id *id) > +{ > + int ret = 0; > + struct dvb_dummy_tuner_config *config = client->dev.platform_data; > + struct dvb_frontend *fe = config->fe; > + struct dvb_dummy_tuner_dev *tuner_dev = NULL; > + > + tuner_dev = kzalloc(sizeof(*tuner_dev), GFP_KERNEL); > + if (!tuner_dev) { > + ret = -ENOMEM; > + goto err; > + } > + > + i2c_set_clientdata(client, tuner_dev); > + tuner_dev->fe = config->fe; > + > + memcpy(&fe->ops.tuner_ops, > + &dvb_dummy_tuner_ops, > + sizeof(struct dvb_tuner_ops)); > + > + fe->tuner_priv = client; > + > + pr_debug("%s: Successfully probed %s\n", __func__, client->name); As you are a driver, you should never need to call any pr_* calls, instead use dev_*(). For this, you can use dev_dbg(), but really, why is that even needed except for your debugging bringup. And for that, you can use ftrace, right? So no need for any printing of anything here. > + return ret; > + > +err: > + pr_err("%s: failed\n", __func__); Again, dev_err() would be proper, but there's no need for any error message here. Don't you need to register the tuner ops with something in this function? > + return ret; > +} > + > +static int dvb_dummy_tuner_i2c_remove(struct i2c_client *client) > +{ > + struct dvb_dummy_tuner_dev *tuner_dev = i2c_get_clientdata(client); > + struct dvb_frontend *fe = tuner_dev->fe; > + > + memset(&fe->ops.tuner_ops, 0, sizeof(struct dvb_tuner_ops)); > + fe->tuner_priv = NULL; > + kfree(tuner_dev); > + Don't you need to unregister the tuner ops in here? thanks, greg k-h _______________________________________________ Linux-kernel-mentees mailing list Linux-kernel-mentees@lists.linuxfoundation.org https://lists.linuxfoundation.org/mailman/listinfo/linux-kernel-mentees ^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [Linux-kernel-mentees] [PATCH 1/1] media: dvb_dummy_tuner: implement driver skeleton 2020-01-09 15:54 ` Greg KH @ 2020-01-09 20:43 ` Daniel W. S. Almeida 0 siblings, 0 replies; 11+ messages in thread From: Daniel W. S. Almeida @ 2020-01-09 20:43 UTC (permalink / raw) To: Greg KH Cc: sean, linux-kernel, tglx, mchehab, linux-kernel-mentees, linux-media Hi Greg! Thanks for chiming in. > As you are a driver, you should never need to call any pr_* calls, > instead use dev_*(). For this, you can use dev_dbg(), but really, why > is that even needed except for your debugging bringup. And for that, > you can use ftrace, right? So no need for any printing of anything > here. > Again, dev_err() would be proper, but there's no need for any error > message here. Let's take these out in v2 then. > Don't you need to register the tuner ops with something in this > function? > Don't you need to unregister the tuner ops in here? It is my understanding that bridge drivers are the ones responsible for this. For instance, I don't see this with either xc4000.c, xc5000.c or mt2060.c. I could be wrong, though. Maybe Mauro could clarify this? What I did miss in this patch was an attach function. Let's also add this in v2. Thanks again, - Daniel. _______________________________________________ Linux-kernel-mentees mailing list Linux-kernel-mentees@lists.linuxfoundation.org https://lists.linuxfoundation.org/mailman/listinfo/linux-kernel-mentees ^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [Linux-kernel-mentees] [PATCH 1/1] media: dvb_dummy_tuner: implement driver skeleton 2020-01-09 15:24 ` [Linux-kernel-mentees] [PATCH 1/1] media: dvb_dummy_tuner: implement driver skeleton Daniel W. S. Almeida 2020-01-09 15:54 ` Greg KH @ 2020-01-09 16:13 ` Mauro Carvalho Chehab 2020-01-09 20:52 ` Daniel W. S. Almeida 2020-01-09 16:45 ` Shuah Khan 2 siblings, 1 reply; 11+ messages in thread From: Mauro Carvalho Chehab @ 2020-01-09 16:13 UTC (permalink / raw) To: Daniel W. S. Almeida Cc: sean, linux-kernel, tglx, linux-kernel-mentees, linux-media Em Thu, 9 Jan 2020 12:24:08 -0300 "Daniel W. S. Almeida" <dwlsalmeida@gmail.com> escreveu: > From: "Daniel W. S. Almeida" <dwlsalmeida@gmail.com> > > Implement the skeleton for the tuner driver in a separate file. > > Signed-off-by: Daniel W. S. Almeida <dwlsalmeida@gmail.com> > --- > drivers/media/tuners/Kconfig | 7 ++ > drivers/media/tuners/Makefile | 1 + > drivers/media/tuners/dvb_dummy_tuner.c | 153 +++++++++++++++++++++++++ > drivers/media/tuners/dvb_dummy_tuner.h | 20 ++++ > 4 files changed, 181 insertions(+) > create mode 100644 drivers/media/tuners/dvb_dummy_tuner.c > create mode 100644 drivers/media/tuners/dvb_dummy_tuner.h > > diff --git a/drivers/media/tuners/Kconfig b/drivers/media/tuners/Kconfig > index e104bb7766e1..efa1591fe0ae 100644 > --- a/drivers/media/tuners/Kconfig > +++ b/drivers/media/tuners/Kconfig > @@ -296,4 +296,11 @@ config MEDIA_TUNER_QM1D1B0004 > default m if !MEDIA_SUBDRV_AUTOSELECT > help > Sharp QM1D1B0004 ISDB-S tuner driver. > + > +config MEDIA_TUNER_DVB_DUMMY_TUNER > + tristate "Dummy tuner" > + depends on MEDIA_SUPPORT && I2C > + default m if !MEDIA_SUBDRV_AUTOSELECT Actually, this is a dummy driver. It should not be auto-selected, as no real hardware depends on it. We don't want production distros to come with those test drivers. When we add a bridge driver (let's say we call it DVB_DUMMY_BRIDGE), then what we could do here would be something like: depends on DVB_DUMMY_BRIDGE default y Cheers, Mauro _______________________________________________ Linux-kernel-mentees mailing list Linux-kernel-mentees@lists.linuxfoundation.org https://lists.linuxfoundation.org/mailman/listinfo/linux-kernel-mentees ^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [Linux-kernel-mentees] [PATCH 1/1] media: dvb_dummy_tuner: implement driver skeleton 2020-01-09 16:13 ` Mauro Carvalho Chehab @ 2020-01-09 20:52 ` Daniel W. S. Almeida 0 siblings, 0 replies; 11+ messages in thread From: Daniel W. S. Almeida @ 2020-01-09 20:52 UTC (permalink / raw) To: Mauro Carvalho Chehab Cc: sean, linux-kernel, tglx, linux-kernel-mentees, linux-media Hi Mauro! > Actually, this is a dummy driver. It should not be auto-selected, as no > real hardware depends on it. We don't want production distros to come with > those test drivers. Let's address this in v2. Thanks. _______________________________________________ Linux-kernel-mentees mailing list Linux-kernel-mentees@lists.linuxfoundation.org https://lists.linuxfoundation.org/mailman/listinfo/linux-kernel-mentees ^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [Linux-kernel-mentees] [PATCH 1/1] media: dvb_dummy_tuner: implement driver skeleton 2020-01-09 15:24 ` [Linux-kernel-mentees] [PATCH 1/1] media: dvb_dummy_tuner: implement driver skeleton Daniel W. S. Almeida 2020-01-09 15:54 ` Greg KH 2020-01-09 16:13 ` Mauro Carvalho Chehab @ 2020-01-09 16:45 ` Shuah Khan 2020-01-09 21:00 ` Daniel W. S. Almeida 2 siblings, 1 reply; 11+ messages in thread From: Shuah Khan @ 2020-01-09 16:45 UTC (permalink / raw) To: Daniel W. S. Almeida, mchehab, sean, tglx, gregkh Cc: linux-kernel-mentees, linux-kernel, linux-media Hi Daniel, On 1/9/20 8:24 AM, Daniel W. S. Almeida wrote: > From: "Daniel W. S. Almeida" <dwlsalmeida@gmail.com> > > Implement the skeleton for the tuner driver in a separate file. Please add more detail here on what this driver does. What this driver is used for and so on. > > Signed-off-by: Daniel W. S. Almeida <dwlsalmeida@gmail.com> > --- > drivers/media/tuners/Kconfig | 7 ++ > drivers/media/tuners/Makefile | 1 + > drivers/media/tuners/dvb_dummy_tuner.c | 153 +++++++++++++++++++++++++ > drivers/media/tuners/dvb_dummy_tuner.h | 20 ++++ > 4 files changed, 181 insertions(+) > create mode 100644 drivers/media/tuners/dvb_dummy_tuner.c > create mode 100644 drivers/media/tuners/dvb_dummy_tuner.h > > diff --git a/drivers/media/tuners/Kconfig b/drivers/media/tuners/Kconfig > index e104bb7766e1..efa1591fe0ae 100644 > --- a/drivers/media/tuners/Kconfig > +++ b/drivers/media/tuners/Kconfig > @@ -296,4 +296,11 @@ config MEDIA_TUNER_QM1D1B0004 > default m if !MEDIA_SUBDRV_AUTOSELECT > help > Sharp QM1D1B0004 ISDB-S tuner driver. > + > +config MEDIA_TUNER_DVB_DUMMY_TUNER > + tristate "Dummy tuner" > + depends on MEDIA_SUPPORT && I2C > + default m if !MEDIA_SUBDRV_AUTOSELECT > + help > + Dummy tuner driver for common TV standards. Samehere. Give more details on what this driver does. Add enough detail to help users decide why they should enable it or not. > endmenu > diff --git a/drivers/media/tuners/Makefile b/drivers/media/tuners/Makefile > index 7b4f8423501e..f98de1cf2e19 100644 > --- a/drivers/media/tuners/Makefile > +++ b/drivers/media/tuners/Makefile > @@ -44,5 +44,6 @@ obj-$(CONFIG_MEDIA_TUNER_QM1D1C0042) += qm1d1c0042.o > obj-$(CONFIG_MEDIA_TUNER_QM1D1B0004) += qm1d1b0004.o > obj-$(CONFIG_MEDIA_TUNER_M88RS6000T) += m88rs6000t.o > obj-$(CONFIG_MEDIA_TUNER_TDA18250) += tda18250.o > +obj-$(CONFIG_MEDIA_TUNER_DVB_DUMMY_TUNER) += dvb_dummy_tuner.o > > ccflags-y += -I$(srctree)/drivers/media/dvb-frontends > diff --git a/drivers/media/tuners/dvb_dummy_tuner.c b/drivers/media/tuners/dvb_dummy_tuner.c > new file mode 100644 > index 000000000000..63d2e47d4739 > --- /dev/null > +++ b/drivers/media/tuners/dvb_dummy_tuner.c > @@ -0,0 +1,153 @@ > +// SPDX-License-Identifier: GPL-2.0-or-later > +/* > + * Driver for Dummy Frontend > + * > + * Written by Daniel W. S. Almeida <dwlsalmeida@gmail.com> General practice is the following. Copyright (c) 2020 Daniel W. S. Almeida <dwlsalmeida@gmail.com> > + */ > + > +#include <linux/errno.h> > +#include <linux/i2c.h> > +#include <linux/module.h> > +#include <linux/slab.h> > +#include <linux/types.h> > +#include <media/dvb_frontend.h> > +#include "dvb_dummy_tuner.h" > + > +struct dvb_dummy_tuner_dev { > + struct dvb_frontend *fe; > +}; > + > +static void dvb_dummy_tuner_release(struct dvb_frontend *fe) > +{ > +} > + > +static int dvb_dummy_tuner_init(struct dvb_frontend *fe) > +{ > + return 0; > +} > + > +static int dvb_dummy_tuner_sleep(struct dvb_frontend *fe) > +{ > + return 0; > +} > + > +static int dvb_dummy_tuner_suspend(struct dvb_frontend *fe) > +{ > + return 0; > +} > + > +static int dvb_dummy_tuner_resume(struct dvb_frontend *fe) > +{ > + return 0; > +} > + > +static int dvb_dummy_tuner_set_params(struct dvb_frontend *fe) > +{ > + return 0; > +} > + > +static int dvb_dummy_tuner_set_config(struct dvb_frontend *fe, void *priv_cfg) > +{ > + return 0; > +} > + > +static int dvb_dummy_tuner_get_frequency(struct dvb_frontend *fe, > + u32 *frequency) > +{ > + return 0; > +} > + > +static int dvb_dummy_tuner_get_bandwidth(struct dvb_frontend *fe, > + u32 *bandwidth) > +{ > + return 0; > +} > + > +static int dvb_dummy_tuner_get_if_frequency(struct dvb_frontend *fe, > + u32 *frequency) > +{ > + return 0; > +} > + > +static int dvb_dummy_tuner_get_status(struct dvb_frontend *fe, u32 *status) > +{ > + return 0; > +} > + > +static const struct dvb_tuner_ops dvb_dummy_tuner_ops = { > + .release = dvb_dummy_tuner_release, > + .init = dvb_dummy_tuner_init, > + .sleep = dvb_dummy_tuner_sleep, > + .suspend = dvb_dummy_tuner_suspend, > + .resume = dvb_dummy_tuner_resume, > + .set_params = dvb_dummy_tuner_set_params, > + .set_config = dvb_dummy_tuner_set_config, > + .get_bandwidth = dvb_dummy_tuner_get_bandwidth, > + .get_frequency = dvb_dummy_tuner_get_frequency, > + .get_if_frequency = dvb_dummy_tuner_get_if_frequency, > + .get_status = dvb_dummy_tuner_get_status, > +}; > + > +static const struct i2c_device_id dvb_dummy_tuner_i2c_id_table[] = { > + {"dvb_dummy_tuner", 0}, > + {} > +}; > +MODULE_DEVICE_TABLE(i2c, dvb_dummy_tuner_i2c_id_table); > + > +static int dvb_dummy_tuner_i2c_probe(struct i2c_client *client, > + const struct i2c_device_id *id) > +{ > + int ret = 0; > + struct dvb_dummy_tuner_config *config = client->dev.platform_data; > + struct dvb_frontend *fe = config->fe; > + struct dvb_dummy_tuner_dev *tuner_dev = NULL; > + > + tuner_dev = kzalloc(sizeof(*tuner_dev), GFP_KERNEL); > + if (!tuner_dev) { > + ret = -ENOMEM; > + goto err; > + } > + > + i2c_set_clientdata(client, tuner_dev); > + tuner_dev->fe = config->fe; > + > + memcpy(&fe->ops.tuner_ops, > + &dvb_dummy_tuner_ops, > + sizeof(struct dvb_tuner_ops)); > + > + fe->tuner_priv = client; > + > + pr_debug("%s: Successfully probed %s\n", __func__, client->name); > + return ret; > + > +err: > + pr_err("%s: failed\n", __func__); > + return ret; > +} > + > +static int dvb_dummy_tuner_i2c_remove(struct i2c_client *client) > +{ > + struct dvb_dummy_tuner_dev *tuner_dev = i2c_get_clientdata(client); > + struct dvb_frontend *fe = tuner_dev->fe; > + > + memset(&fe->ops.tuner_ops, 0, sizeof(struct dvb_tuner_ops)); > + fe->tuner_priv = NULL; > + kfree(tuner_dev); > + > + return 0; > +} > + > +static struct i2c_driver dvb_dummy_tuner_i2c_driver = { > + .driver = { > + .name = "dvb_dummy_tuner", > + .suppress_bind_attrs = true, > + }, > + .probe = dvb_dummy_tuner_i2c_probe, > + .remove = dvb_dummy_tuner_i2c_remove, > + .id_table = dvb_dummy_tuner_i2c_id_table, > +}; > +module_i2c_driver(dvb_dummy_tuner_i2c_driver); > + > +MODULE_DESCRIPTION("DVB Dummy Tuner"); > +MODULE_AUTHOR("Daniel W. S. Almeida"); > +MODULE_LICENSE("GPL"); > diff --git a/drivers/media/tuners/dvb_dummy_tuner.h b/drivers/media/tuners/dvb_dummy_tuner.h > new file mode 100644 > index 000000000000..fde7628258fa > --- /dev/null > +++ b/drivers/media/tuners/dvb_dummy_tuner.h > @@ -0,0 +1,20 @@ > +/* SPDX-License-Identifier: GPL-2.0 */ > +/* > + * DVB Dummy Tuner > + * Please add details about the driver similar to the .c file. > + */ > +#ifndef __TUNER_DVB_DUMMY_TUNER_H__ > +#define __TUNER_DVB_DUMMY_TUNER_H__ > + > +#include <media/dvb_frontend.h> > +/** > + * struct dvb_dummy_tuner_config - configuration parameters for the dummy tuner > + * > + * @fe: > + * frontend returned by driver > + */ > +struct dvb_dummy_tuner_config { > + struct dvb_frontend *fe; > +}; > + > +#endif /*__TUNER_DVB_DUMMY_TUNER_H__ */ > Looks like there is more code to be added to register/unregister thanks, -- Shuah _______________________________________________ Linux-kernel-mentees mailing list Linux-kernel-mentees@lists.linuxfoundation.org https://lists.linuxfoundation.org/mailman/listinfo/linux-kernel-mentees ^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [Linux-kernel-mentees] [PATCH 1/1] media: dvb_dummy_tuner: implement driver skeleton 2020-01-09 16:45 ` Shuah Khan @ 2020-01-09 21:00 ` Daniel W. S. Almeida 2020-01-09 21:11 ` Shuah Khan 0 siblings, 1 reply; 11+ messages in thread From: Daniel W. S. Almeida @ 2020-01-09 21:00 UTC (permalink / raw) To: Shuah Khan, mchehab, sean, tglx, gregkh Cc: linux-kernel-mentees, linux-kernel, linux-media Hi Shuah, thank you for you input! > > Looks like there is more code to be added to register/unregister Just to be clear, attach() is missing, but register / unregister belong in the bridge driver. Is this correct? > > Please add more detail here on what this driver does. What this > driver is used for and so on. > > > Samehere. Give more details on what this driver does. Add enough detail > to help users decide why they should enable it or not. > > General practice is the following. > > Copyright (c) 2020 Daniel W. S. Almeida <dwlsalmeida@gmail.com> > Please add details about the driver similar to the .c file. OK. Thanks - Daniel _______________________________________________ Linux-kernel-mentees mailing list Linux-kernel-mentees@lists.linuxfoundation.org https://lists.linuxfoundation.org/mailman/listinfo/linux-kernel-mentees ^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [Linux-kernel-mentees] [PATCH 1/1] media: dvb_dummy_tuner: implement driver skeleton 2020-01-09 21:00 ` Daniel W. S. Almeida @ 2020-01-09 21:11 ` Shuah Khan 0 siblings, 0 replies; 11+ messages in thread From: Shuah Khan @ 2020-01-09 21:11 UTC (permalink / raw) To: Daniel W. S. Almeida, mchehab, sean, tglx, gregkh Cc: linux-kernel-mentees, linux-kernel, linux-media On 1/9/20 2:00 PM, Daniel W. S. Almeida wrote: > Hi Shuah, thank you for you input! > > >> >> Looks like there is more code to be added to register/unregister > > Just to be clear, attach() is missing, but register / unregister belong > in the bridge driver. Is this correct? > > Right attach/detach is what I was thinking. >> >> Please add more detail here on what this driver does. What this >> driver is used for and so on. >> >> >> Samehere. Give more details on what this driver does. Add enough detail >> to help users decide why they should enable it or not. >> General practice is the following. >> >> Copyright (c) 2020 Daniel W. S. Almeida <dwlsalmeida@gmail.com> > >> Please add details about the driver similar to the .c file. > > OK. > thanks, -- Shuah _______________________________________________ Linux-kernel-mentees mailing list Linux-kernel-mentees@lists.linuxfoundation.org https://lists.linuxfoundation.org/mailman/listinfo/linux-kernel-mentees ^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [Linux-kernel-mentees] [PATCH 0/1] Implement a DVB Dummy Tuner 2020-01-09 15:24 [Linux-kernel-mentees] [PATCH 0/1] Implement a DVB Dummy Tuner Daniel W. S. Almeida 2020-01-09 15:24 ` [Linux-kernel-mentees] [PATCH 1/1] media: dvb_dummy_tuner: implement driver skeleton Daniel W. S. Almeida @ 2020-01-09 16:07 ` Mauro Carvalho Chehab 2020-01-09 20:51 ` Daniel W. S. Almeida 1 sibling, 1 reply; 11+ messages in thread From: Mauro Carvalho Chehab @ 2020-01-09 16:07 UTC (permalink / raw) To: Daniel W. S. Almeida Cc: sean, linux-kernel, tglx, linux-kernel-mentees, linux-media Em Thu, 9 Jan 2020 12:24:07 -0300 "Daniel W. S. Almeida" <dwlsalmeida@gmail.com> escreveu: > From: "Daniel W. S. Almeida" <dwlsalmeida@gmail.com> > > This patch series should implement a dummy DVB tuner as part of ongoing work > on a virtual DVB test driver under the 2020 Spring Linux Kernel Mentorship Program. No need for a patch 0/1. If you want to send just one patch, just sent it directly as: [PATCH] foo > > as > Daniel W. S. Almeida (1): > media: dvb_dummy_tuner: implement driver skeleton > > drivers/media/tuners/Kconfig | 7 ++ > drivers/media/tuners/Makefile | 1 + > drivers/media/tuners/dvb_dummy_tuner.c | 153 +++++++++++++++++++++++++ > drivers/media/tuners/dvb_dummy_tuner.h | 20 ++++ > 4 files changed, 181 insertions(+) > create mode 100644 drivers/media/tuners/dvb_dummy_tuner.c > create mode 100644 drivers/media/tuners/dvb_dummy_tuner.h > Cheers, Mauro _______________________________________________ Linux-kernel-mentees mailing list Linux-kernel-mentees@lists.linuxfoundation.org https://lists.linuxfoundation.org/mailman/listinfo/linux-kernel-mentees ^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [Linux-kernel-mentees] [PATCH 0/1] Implement a DVB Dummy Tuner 2020-01-09 16:07 ` [Linux-kernel-mentees] [PATCH 0/1] Implement a DVB Dummy Tuner Mauro Carvalho Chehab @ 2020-01-09 20:51 ` Daniel W. S. Almeida 0 siblings, 0 replies; 11+ messages in thread From: Daniel W. S. Almeida @ 2020-01-09 20:51 UTC (permalink / raw) To: Mauro Carvalho Chehab Cc: sean, linux-kernel, tglx, linux-kernel-mentees, linux-media Hi Mauro! > No need for a patch 0/1. If you want to send just one patch, just sent it > directly as: > > [PATCH] foo I planned on adding more commits to this series in v2, v3 and so forth so they would be applied in order, since they would be touching the same file. Likewise, the changes could be reviewed in a piecemeal fashion making it easier for reviewers. Is this not advisable? Anyway, thanks for the heads up. - Daniel. _______________________________________________ Linux-kernel-mentees mailing list Linux-kernel-mentees@lists.linuxfoundation.org https://lists.linuxfoundation.org/mailman/listinfo/linux-kernel-mentees ^ permalink raw reply [flat|nested] 11+ messages in thread
end of thread, other threads:[~2020-01-09 21:11 UTC | newest] Thread overview: 11+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2020-01-09 15:24 [Linux-kernel-mentees] [PATCH 0/1] Implement a DVB Dummy Tuner Daniel W. S. Almeida 2020-01-09 15:24 ` [Linux-kernel-mentees] [PATCH 1/1] media: dvb_dummy_tuner: implement driver skeleton Daniel W. S. Almeida 2020-01-09 15:54 ` Greg KH 2020-01-09 20:43 ` Daniel W. S. Almeida 2020-01-09 16:13 ` Mauro Carvalho Chehab 2020-01-09 20:52 ` Daniel W. S. Almeida 2020-01-09 16:45 ` Shuah Khan 2020-01-09 21:00 ` Daniel W. S. Almeida 2020-01-09 21:11 ` Shuah Khan 2020-01-09 16:07 ` [Linux-kernel-mentees] [PATCH 0/1] Implement a DVB Dummy Tuner Mauro Carvalho Chehab 2020-01-09 20:51 ` Daniel W. S. Almeida
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