From: "Daniel W. S. Almeida" <dwlsalmeida@xxxxxxxxx> This series is work in progress. It represents the current work done on a virtual DVB driver for the Linux media subsystem. I am new to the media subsystem and to kernel development in general. This applies on top of this branch https://git.linuxtv.org/mchehab/experimental.git/log/?h=media-kconfig for now, as these changes have not been applied to the media tree yet. The changes in this branch have reorganized where test drivers go in the subsystem. The dummy driver written by Emard was left untouched. As for vidtv, we currently have a tuner driver, a demodulator driver, a bridge driver and some MPEG PSI code. This should be, therefore, a minimum viable example for what this driver intends to become in the future. I appreciate any feedback given. Thank you. Changes in v3: Added a bridge driver Renamed the driver to vidtv Renamed/reworked commits into smaller pieces Moved the driver into its own directory Fixed the code for the signal strength in the tuner Removed useless enums in the tuner driver (e.g. lock_status, power_status...) Reworked the logic for the poll_snr thread in the demodulator driver Moved MPEG related code to the bridge driver, as it controls the demux logic Changed literals to #defines, used sizeof in place of integer literals when computing the size of PSI structs Moved the MPEG PSI tables to the heap to reduce stack space usage Now using usleep_range in place of msleep_interruptible in the MPEG TS thread Wrapped memcpy and memset to protect against buffer overflow when writing to the MPEG TS buffer. Changes in v2: Attempted not to break assignments into multiple lines as much as possible. Code now passes checkpatch strict mode media: dvb_dummy_tuner: implement driver skeleton Changed snr values to mili db Return value from 0-100 to indicate how far off the requested frequency is from a valid one Use the frequency shift to interpolate between 34dB and 10dB if we can not match against the SNR lookup table Remove sleep calls for suspend/resume Fix memcpy call for the config struct media: dvb_dummy_fe.c: lose TS lock on bad snr Randomly recover the TS lock if the signal quality improves media: dvb_dummy_fe.c: write PSI information into DMX buffer Split the patch into multiple header/source files Hexadecimal literals are now lower case Prefer short function names / reduce function signatures Add #defines for constants when computing section lengths Change signature for functions that take a dummy channel as argument (i.e. channels* is now channels[NUM_CHANNELS]) Daniel W. S. Almeida (6): media: vidtv: add Kconfig entry media: vidtv: implement a tuner driver media: vidtv: implement a demodulator driver media: vidtv: implement a PSI generator media: vidtv: move config structs into a common header media: vidtv: add a bridge driver drivers/media/test_drivers/Kconfig | 10 + drivers/media/test_drivers/Makefile | 1 + drivers/media/test_drivers/vidtv/Kconfig | 11 + drivers/media/test_drivers/vidtv/Makefile | 6 + .../media/test_drivers/vidtv/vidtv_bridge.c | 736 ++++++++++++++ .../media/test_drivers/vidtv/vidtv_bridge.h | 51 + .../media/test_drivers/vidtv/vidtv_common.c | 44 + .../media/test_drivers/vidtv/vidtv_common.h | 105 ++ .../media/test_drivers/vidtv/vidtv_demod.c | 493 +++++++++ .../media/test_drivers/vidtv/vidtv_demod.h | 34 + drivers/media/test_drivers/vidtv/vidtv_psi.c | 960 ++++++++++++++++++ drivers/media/test_drivers/vidtv/vidtv_psi.h | 294 ++++++ .../media/test_drivers/vidtv/vidtv_tuner.c | 403 ++++++++ 13 files changed, 3148 insertions(+) create mode 100644 drivers/media/test_drivers/vidtv/Kconfig create mode 100644 drivers/media/test_drivers/vidtv/Makefile create mode 100644 drivers/media/test_drivers/vidtv/vidtv_bridge.c create mode 100644 drivers/media/test_drivers/vidtv/vidtv_bridge.h create mode 100644 drivers/media/test_drivers/vidtv/vidtv_common.c create mode 100644 drivers/media/test_drivers/vidtv/vidtv_common.h create mode 100644 drivers/media/test_drivers/vidtv/vidtv_demod.c create mode 100644 drivers/media/test_drivers/vidtv/vidtv_demod.h create mode 100644 drivers/media/test_drivers/vidtv/vidtv_psi.c create mode 100644 drivers/media/test_drivers/vidtv/vidtv_psi.h create mode 100644 drivers/media/test_drivers/vidtv/vidtv_tuner.c -- 2.26.0
