media: vidtv: add date to the current event (16002854) · Commits · 戴 / test

drivers/media/test-drivers/vidtv/vidtv_psi.c

+41 −3

Original line number	Diff line number	Diff line
		@@ -11,13 +11,16 @@

		#define pr_fmt(fmt) KBUILD_MODNAME ":%s, %d: " fmt, __func__, __LINE__

		#include <linux/bcd.h>
		#include <linux/crc32.h>
		#include <linux/kernel.h>
		#include <linux/ktime.h>
		#include <linux/printk.h>
		#include <linux/ratelimit.h>
		#include <linux/slab.h>
		#include <linux/string.h>
		#include <linux/string.h>
		#include <linux/time.h>
		#include <linux/types.h>

		#include "vidtv_common.h"
		@@ -1953,16 +1956,51 @@ u32 vidtv_psi_eit_write_into(struct vidtv_psi_eit_write_args args)
		struct vidtv_psi_table_eit_event
		vidtv_psi_eit_event_init(struct vidtv_psi_table_eit_event head, u16 event_id)
		{
		const u8 DURATION_ONE_HOUR[] = {1, 0, 0};
		const u8 DURATION[] = {0x23, 0x59, 0x59}; /* BCD encoded */
		struct vidtv_psi_table_eit_event *e;
		struct timespec64 ts;
		struct tm time;
		int mjd, l;
		__be16 mjd_be;

		e = kzalloc(sizeof(*e), GFP_KERNEL);
		if (!e)
		return NULL;

		e->event_id = cpu_to_be16(event_id);
		memset(e->start_time, 0xff, sizeof(e->start_time)); //todo: 0xff means 'unspecified'
		memcpy(e->duration, DURATION_ONE_HOUR, sizeof(e->duration)); //todo, default to this for now

		ts = ktime_to_timespec64(ktime_get_real());
		time64_to_tm(ts.tv_sec, 0, &time);

		/* Convert date to Modified Julian Date - per EN 300 468 Annex C */
		if (time.tm_mon < 2)
		l = 1;
		else
		l = 0;

		mjd = 14956 + time.tm_mday;
		mjd += (time.tm_year - l) * 36525 / 100;
		mjd += (time.tm_mon + 2 + l * 12) * 306001 / 10000;
		mjd_be = cpu_to_be16(mjd);

		/*
		* Store MJD and hour/min/sec to the event.
		*
		* Let's make the event to start on a full hour
		*/
		memcpy(e->start_time, &mjd_be, sizeof(mjd_be));
		e->start_time[2] = bin2bcd(time.tm_hour);
		e->start_time[3] = 0;
		e->start_time[4] = 0;

		/*
		* TODO: for now, the event will last for a day. Should be
		* enough for testing purposes, but if one runs the driver
		* for more than that, the current event will become invalid.
		* So, we need a better code here in order to change the start
		* time once the event expires.
		*/
		memcpy(e->duration, DURATION, sizeof(e->duration));

		e->bitfield = cpu_to_be16(RUNNING << 13);

Admin message