mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-02 05:36:43 +07:00
9b174527e7
In the media drivers, the v4l2 core knows about all submodules and calls into them from a common function. However this cannot work if the modules that get called are loadable and the core is built-in. In that case we get drivers/built-in.o: In function `set_type': drivers/media/v4l2-core/tuner-core.c:301: undefined reference to `tea5767_attach' drivers/media/v4l2-core/tuner-core.c:307: undefined reference to `tea5761_attach' drivers/media/v4l2-core/tuner-core.c:349: undefined reference to `tda9887_attach' drivers/media/v4l2-core/tuner-core.c:405: undefined reference to `xc4000_attach' This was working previously, until the IS_ENABLED() macro was used to replace the construct like #if defined(CONFIG_DVB_CX24110) || (defined(CONFIG_DVB_CX24110_MODULE) && defined(MODULE)) with the difference that the new code no longer checks whether it is being built as a loadable module itself. To fix this, this new patch adds an 'IS_REACHABLE' macro, which evaluates true in exactly the condition that was used previously. The downside of this is that this trades an obvious link error for a more subtle runtime failure, but it is clear that the change that introduced the link error was unintentional and it seems better to revert it for now. Also, a similar change was originally created by Trent Piepho and then reverted by teh change to the IS_ENABLED macro. Ideally Kconfig would be used to avoid the case of a broken dependency, or the code restructured in a way to turn around the dependency, but either way would require much larger changes here. Fixes:7b34be71db("[media] use IS_ENABLED() macro") See-also:c5dec9fb24("V4L/DVB (4751): Fix DBV_FE_CUSTOMISE for card drivers compiled into kernel") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
96 lines
2.6 KiB
C
96 lines
2.6 KiB
C
/*
|
|
* Support for Legend Silicon GB20600 (a.k.a DMB-TH) demodulator
|
|
* LGS8913, LGS8GL5, LGS8G75
|
|
* experimental support LGS8G42, LGS8G52
|
|
*
|
|
* Copyright (C) 2007-2009 David T.L. Wong <davidtlwong@gmail.com>
|
|
* Copyright (C) 2008 Sirius International (Hong Kong) Limited
|
|
* Timothy Lee <timothy.lee@siriushk.com> (for initial work on LGS8GL5)
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*
|
|
*/
|
|
|
|
#ifndef __LGS8GXX_H__
|
|
#define __LGS8GXX_H__
|
|
|
|
#include <linux/kconfig.h>
|
|
#include <linux/dvb/frontend.h>
|
|
#include <linux/i2c.h>
|
|
|
|
#define LGS8GXX_PROD_LGS8913 0
|
|
#define LGS8GXX_PROD_LGS8GL5 1
|
|
#define LGS8GXX_PROD_LGS8G42 3
|
|
#define LGS8GXX_PROD_LGS8G52 4
|
|
#define LGS8GXX_PROD_LGS8G54 5
|
|
#define LGS8GXX_PROD_LGS8G75 6
|
|
|
|
struct lgs8gxx_config {
|
|
|
|
/* product type */
|
|
u8 prod;
|
|
|
|
/* the demodulator's i2c address */
|
|
u8 demod_address;
|
|
|
|
/* parallel or serial transport stream */
|
|
u8 serial_ts;
|
|
|
|
/* transport stream polarity*/
|
|
u8 ts_clk_pol;
|
|
|
|
/* transport stream clock gated by ts_valid */
|
|
u8 ts_clk_gated;
|
|
|
|
/* A/D Clock frequency */
|
|
u32 if_clk_freq; /* in kHz */
|
|
|
|
/* IF frequency */
|
|
u32 if_freq; /* in kHz */
|
|
|
|
/*Use External ADC*/
|
|
u8 ext_adc;
|
|
|
|
/*External ADC output two's complement*/
|
|
u8 adc_signed;
|
|
|
|
/*Sample IF data at falling edge of IF_CLK*/
|
|
u8 if_neg_edge;
|
|
|
|
/*IF use Negative center frequency*/
|
|
u8 if_neg_center;
|
|
|
|
/*8G75 internal ADC input range selection*/
|
|
/*0: 0.8Vpp, 1: 1.0Vpp, 2: 1.6Vpp, 3: 2.0Vpp*/
|
|
u8 adc_vpp;
|
|
|
|
/* slave address and configuration of the tuner */
|
|
u8 tuner_address;
|
|
};
|
|
|
|
#if IS_REACHABLE(CONFIG_DVB_LGS8GXX)
|
|
extern struct dvb_frontend *lgs8gxx_attach(const struct lgs8gxx_config *config,
|
|
struct i2c_adapter *i2c);
|
|
#else
|
|
static inline
|
|
struct dvb_frontend *lgs8gxx_attach(const struct lgs8gxx_config *config,
|
|
struct i2c_adapter *i2c) {
|
|
printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
|
|
return NULL;
|
|
}
|
|
#endif /* CONFIG_DVB_LGS8GXX */
|
|
|
|
#endif /* __LGS8GXX_H__ */
|