C++ (Cpp) tsif_get_ref_clk_counter示例

示例#1

文件： mpq_dmx_plugin_tsif.c 项目： SchemingWeasels/Cyanogenmod_kernel_samsung_loganreltexx

/**
 * Reads TSIF STC from TSPP
 *
 * @demux: demux device
 * @num: STC number. 0 for TSIF0 and 1 for TSIF1.
 * @stc: STC value
 * @base: divisor to get 90KHz value
 *
 * Return     error code
 */
static int mpq_tsif_dmx_get_stc(struct dmx_demux *demux, unsigned int num,
		u64 *stc, unsigned int *base)
{
	struct tsif_driver_info *tsif_driver;
	u32 tcr_counter;

	if (!demux || !stc || !base)
		return -EINVAL;

	if (num == 0)
		tsif_driver = &mpq_dmx_tsif_info.tsif[0].tsif_driver;
	else if (num == 1)
		tsif_driver = &mpq_dmx_tsif_info.tsif[1].tsif_driver;
	else
		return -EINVAL;

	if (!tsif_driver->tsif_handler)
		return -ENODEV;

	tsif_get_ref_clk_counter(tsif_driver->tsif_handler, &tcr_counter);

	*stc = ((u64)tcr_counter) * 256; /* conversion to 27MHz */
	*base = 300; /* divisor to get 90KHz clock from stc value */

	return 0;
}

示例#2

文件： mpq_dmx_plugin_tsif.c 项目： DirtyDroidX/android_kernel_htc_m8ul

static int mpq_tsif_dmx_get_stc(struct dmx_demux *demux, unsigned int num,
		u64 *stc, unsigned int *base)
{
	struct tsif_driver_info *tsif_driver;
	u32 tcr_counter;

	if (!demux || !stc || !base)
		return -EINVAL;

	if (num == 0)
		tsif_driver = &mpq_dmx_tsif_info.tsif[0].tsif_driver;
	else if (num == 1)
		tsif_driver = &mpq_dmx_tsif_info.tsif[1].tsif_driver;
	else
		return -EINVAL;

	if (!tsif_driver->tsif_handler)
		return -ENODEV;

	tsif_get_ref_clk_counter(tsif_driver->tsif_handler, &tcr_counter);

	*stc = ((u64)tcr_counter) * 256; 
	*base = 300; 

	return 0;
}