+ Myungjoo Ham,
It used at devfreq. Mr. Ham can you explain it in detail?
Thank you,
Kyungmin Park
,
On 8/9/12, Rafael J. Wysocki <r...@sisk.pl> wrote:
> On Wednesday, August 08, 2012, Jonghwa Lee wrote:
>> Bus throughput metric is added to PM QoS in order to control the
>> frequency of memory interfaces and busses with PM QoS.
>>
>> Signed-off-by: Jonghwa Lee <jonghwa3....@samsung.com>
>> Signed-off-by: Kyungmin Park <kyungmin.p...@samsung.com>
>
> I said some time ago I didn't want any new global PM QoS classes to be
> added this way.
>
> Can you please post a driver patch using this new thing?
>
> Rafael
>
>
>> ---
>> include/linux/pm_qos.h | 2 ++
>> kernel/power/qos.c | 15 ++++++++++++++-
>> 2 files changed, 16 insertions(+), 1 deletions(-)
>>
>> diff --git a/include/linux/pm_qos.h b/include/linux/pm_qos.h
>> index 233149c..6db4939 100644
>> --- a/include/linux/pm_qos.h
>> +++ b/include/linux/pm_qos.h
>> @@ -15,6 +15,7 @@ enum {
>> PM_QOS_CPU_DMA_LATENCY,
>> PM_QOS_NETWORK_LATENCY,
>> PM_QOS_NETWORK_THROUGHPUT,
>> + PM_QOS_BUS_DMA_THROUGHPUT,
>>
>> /* insert new class ID */
>> PM_QOS_NUM_CLASSES,
>> @@ -26,6 +27,7 @@ enum {
>> #define PM_QOS_NETWORK_LAT_DEFAULT_VALUE (2000 * USEC_PER_SEC)
>> #define PM_QOS_NETWORK_THROUGHPUT_DEFAULT_VALUE 0
>> #define PM_QOS_DEV_LAT_DEFAULT_VALUE 0
>> +#define PM_QOS_BUS_DMA_THROUGHPUT_DEFAULT_VALUE 0
>>
>> struct pm_qos_request {
>> struct plist_node node;
>> diff --git a/kernel/power/qos.c b/kernel/power/qos.c
>> index 6a031e6..75322cc 100644
>> --- a/kernel/power/qos.c
>> +++ b/kernel/power/qos.c
>> @@ -100,12 +100,25 @@ static struct pm_qos_object
>> network_throughput_pm_qos = {
>> .name = "network_throughput",
>> };
>>
>> +static BLOCKING_NOTIFIER_HEAD(bus_dma_throughput_notifier);
>> +static struct pm_qos_constraints bus_dma_tput_constraints = {
>> + .list = PLIST_HEAD_INIT(bus_dma_tput_constraints.list),
>> + .target_value = PM_QOS_BUS_DMA_THROUGHPUT_DEFAULT_VALUE,
>> + .default_value = PM_QOS_BUS_DMA_THROUGHPUT_DEFAULT_VALUE,
>> + .type = PM_QOS_MAX,
>> + .notifiers = &bus_dma_throughput_notifier,
>> +};
>> +static struct pm_qos_object bus_dma_throughput_pm_qos = {
>> + .constraints = &bus_dma_tput_constraints,
>> + .name = "bus_dma_throughput",
>> +};
>>
>> static struct pm_qos_object *pm_qos_array[] = {
>> &null_pm_qos,
>> &cpu_dma_pm_qos,
>> &network_lat_pm_qos,
>> - &network_throughput_pm_qos
>> + &network_throughput_pm_qos,
>> + &bus_dma_throughput_pm_qos,
>> };
>>
>> static ssize_t pm_qos_power_write(struct file *filp, const char __user
>> *buf,
>>
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-pm" in
> the body of a message to majord...@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
>
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
