mirror of
https://github.com/tbsdtv/linux_media.git
synced 2025-07-23 12:43:29 +02:00
7d374b2090
There is a repeated pattern in multiple drivers where they want to switch the bandwidth between zero and some other value. This is happening often in the suspend/resume callbacks. Let's add helper functions to enable and disable the path, so that callers don't have to take care of remembering the bandwidth values and handle this in the framework instead. With this patch the users can call icc_disable() and icc_enable() to lower their bandwidth request to zero and then restore it back to it's previous value. Suggested-by: Evan Green <evgreen@chromium.org> Suggested-by: Bjorn Andersson <bjorn.andersson@linaro.org> Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org> Reviewed-by: Matthias Kaehlcke <mka@chromium.org> Link: https://lore.kernel.org/r/20200507120846.8354-1-georgi.djakov@linaro.org Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
84 lines
1.9 KiB
C
84 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* Copyright (c) 2018-2019, Linaro Ltd.
|
|
* Author: Georgi Djakov <georgi.djakov@linaro.org>
|
|
*/
|
|
|
|
#ifndef __LINUX_INTERCONNECT_H
|
|
#define __LINUX_INTERCONNECT_H
|
|
|
|
#include <linux/mutex.h>
|
|
#include <linux/types.h>
|
|
|
|
/* macros for converting to icc units */
|
|
#define Bps_to_icc(x) ((x) / 1000)
|
|
#define kBps_to_icc(x) (x)
|
|
#define MBps_to_icc(x) ((x) * 1000)
|
|
#define GBps_to_icc(x) ((x) * 1000 * 1000)
|
|
#define bps_to_icc(x) (1)
|
|
#define kbps_to_icc(x) ((x) / 8 + ((x) % 8 ? 1 : 0))
|
|
#define Mbps_to_icc(x) ((x) * 1000 / 8)
|
|
#define Gbps_to_icc(x) ((x) * 1000 * 1000 / 8)
|
|
|
|
struct icc_path;
|
|
struct device;
|
|
|
|
#if IS_ENABLED(CONFIG_INTERCONNECT)
|
|
|
|
struct icc_path *icc_get(struct device *dev, const int src_id,
|
|
const int dst_id);
|
|
struct icc_path *of_icc_get(struct device *dev, const char *name);
|
|
struct icc_path *devm_of_icc_get(struct device *dev, const char *name);
|
|
void icc_put(struct icc_path *path);
|
|
int icc_enable(struct icc_path *path);
|
|
int icc_disable(struct icc_path *path);
|
|
int icc_set_bw(struct icc_path *path, u32 avg_bw, u32 peak_bw);
|
|
void icc_set_tag(struct icc_path *path, u32 tag);
|
|
|
|
#else
|
|
|
|
static inline struct icc_path *icc_get(struct device *dev, const int src_id,
|
|
const int dst_id)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline struct icc_path *of_icc_get(struct device *dev,
|
|
const char *name)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline struct icc_path *devm_of_icc_get(struct device *dev,
|
|
const char *name)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline void icc_put(struct icc_path *path)
|
|
{
|
|
}
|
|
|
|
static inline int icc_enable(struct icc_path *path)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int icc_disable(struct icc_path *path)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int icc_set_bw(struct icc_path *path, u32 avg_bw, u32 peak_bw)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void icc_set_tag(struct icc_path *path, u32 tag)
|
|
{
|
|
}
|
|
|
|
#endif /* CONFIG_INTERCONNECT */
|
|
|
|
#endif /* __LINUX_INTERCONNECT_H */
|