* [PATCH v2 2/4] devfreq/drivers/lima: Use devfreq cooling device registration
2021-03-05 17:03 [PATCH v2 1/4] devfreq: Register devfreq as a cooling device on demand Daniel Lezcano
@ 2021-03-05 17:03 ` Daniel Lezcano
2021-03-05 17:03 ` Daniel Lezcano
` (2 subsequent siblings)
3 siblings, 0 replies; 8+ messages in thread
From: Daniel Lezcano @ 2021-03-05 17:03 UTC (permalink / raw)
To: cwchoi00
Cc: lukasz.luba, linux-kernel, linux-pm, steven.price, Qiang Yu,
David Airlie, Daniel Vetter, open list:DRM DRIVERS FOR LIMA,
moderated list:DRM DRIVERS FOR LIMA
The devfreq core code is able to register the devfreq device as a
cooling device if the 'is_cooling_device' flag is set in the profile.
Use this flag and remove the cooling device registering code.
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
---
drivers/gpu/drm/lima/lima_devfreq.c | 14 +-------------
drivers/gpu/drm/lima/lima_devfreq.h | 2 --
2 files changed, 1 insertion(+), 15 deletions(-)
diff --git a/drivers/gpu/drm/lima/lima_devfreq.c b/drivers/gpu/drm/lima/lima_devfreq.c
index 5686ad4aaf7c..86aea1bdc4f4 100644
--- a/drivers/gpu/drm/lima/lima_devfreq.c
+++ b/drivers/gpu/drm/lima/lima_devfreq.c
@@ -7,7 +7,6 @@
*/
#include <linux/clk.h>
#include <linux/devfreq.h>
-#include <linux/devfreq_cooling.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/pm_opp.h>
@@ -84,17 +83,13 @@ static struct devfreq_dev_profile lima_devfreq_profile = {
.polling_ms = 50, /* ~3 frames */
.target = lima_devfreq_target,
.get_dev_status = lima_devfreq_get_dev_status,
+ .is_cooling_device = true,
};
void lima_devfreq_fini(struct lima_device *ldev)
{
struct lima_devfreq *devfreq = &ldev->devfreq;
- if (devfreq->cooling) {
- devfreq_cooling_unregister(devfreq->cooling);
- devfreq->cooling = NULL;
- }
-
if (devfreq->devfreq) {
devm_devfreq_remove_device(ldev->dev, devfreq->devfreq);
devfreq->devfreq = NULL;
@@ -110,7 +105,6 @@ void lima_devfreq_fini(struct lima_device *ldev)
int lima_devfreq_init(struct lima_device *ldev)
{
- struct thermal_cooling_device *cooling;
struct device *dev = ldev->dev;
struct opp_table *opp_table;
struct devfreq *devfreq;
@@ -173,12 +167,6 @@ int lima_devfreq_init(struct lima_device *ldev)
ldevfreq->devfreq = devfreq;
- cooling = of_devfreq_cooling_register(dev->of_node, devfreq);
- if (IS_ERR(cooling))
- dev_info(dev, "Failed to register cooling device\n");
- else
- ldevfreq->cooling = cooling;
-
return 0;
err_fini:
diff --git a/drivers/gpu/drm/lima/lima_devfreq.h b/drivers/gpu/drm/lima/lima_devfreq.h
index 2d9b3008ce77..c43a2069e5d3 100644
--- a/drivers/gpu/drm/lima/lima_devfreq.h
+++ b/drivers/gpu/drm/lima/lima_devfreq.h
@@ -9,7 +9,6 @@
struct devfreq;
struct opp_table;
-struct thermal_cooling_device;
struct lima_device;
@@ -17,7 +16,6 @@ struct lima_devfreq {
struct devfreq *devfreq;
struct opp_table *clkname_opp_table;
struct opp_table *regulators_opp_table;
- struct thermal_cooling_device *cooling;
ktime_t busy_time;
ktime_t idle_time;
--
2.17.1
^ permalink raw reply related [flat|nested] 8+ messages in thread
* [PATCH v2 2/4] devfreq/drivers/lima: Use devfreq cooling device registration
@ 2021-03-05 17:03 ` Daniel Lezcano
0 siblings, 0 replies; 8+ messages in thread
From: Daniel Lezcano @ 2021-03-05 17:03 UTC (permalink / raw)
To: cwchoi00
Cc: moderated list:DRM DRIVERS FOR LIMA, linux-pm, David Airlie,
linux-kernel, open list:DRM DRIVERS FOR LIMA, steven.price,
Qiang Yu, lukasz.luba
The devfreq core code is able to register the devfreq device as a
cooling device if the 'is_cooling_device' flag is set in the profile.
Use this flag and remove the cooling device registering code.
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
---
drivers/gpu/drm/lima/lima_devfreq.c | 14 +-------------
drivers/gpu/drm/lima/lima_devfreq.h | 2 --
2 files changed, 1 insertion(+), 15 deletions(-)
diff --git a/drivers/gpu/drm/lima/lima_devfreq.c b/drivers/gpu/drm/lima/lima_devfreq.c
index 5686ad4aaf7c..86aea1bdc4f4 100644
--- a/drivers/gpu/drm/lima/lima_devfreq.c
+++ b/drivers/gpu/drm/lima/lima_devfreq.c
@@ -7,7 +7,6 @@
*/
#include <linux/clk.h>
#include <linux/devfreq.h>
-#include <linux/devfreq_cooling.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/pm_opp.h>
@@ -84,17 +83,13 @@ static struct devfreq_dev_profile lima_devfreq_profile = {
.polling_ms = 50, /* ~3 frames */
.target = lima_devfreq_target,
.get_dev_status = lima_devfreq_get_dev_status,
+ .is_cooling_device = true,
};
void lima_devfreq_fini(struct lima_device *ldev)
{
struct lima_devfreq *devfreq = &ldev->devfreq;
- if (devfreq->cooling) {
- devfreq_cooling_unregister(devfreq->cooling);
- devfreq->cooling = NULL;
- }
-
if (devfreq->devfreq) {
devm_devfreq_remove_device(ldev->dev, devfreq->devfreq);
devfreq->devfreq = NULL;
@@ -110,7 +105,6 @@ void lima_devfreq_fini(struct lima_device *ldev)
int lima_devfreq_init(struct lima_device *ldev)
{
- struct thermal_cooling_device *cooling;
struct device *dev = ldev->dev;
struct opp_table *opp_table;
struct devfreq *devfreq;
@@ -173,12 +167,6 @@ int lima_devfreq_init(struct lima_device *ldev)
ldevfreq->devfreq = devfreq;
- cooling = of_devfreq_cooling_register(dev->of_node, devfreq);
- if (IS_ERR(cooling))
- dev_info(dev, "Failed to register cooling device\n");
- else
- ldevfreq->cooling = cooling;
-
return 0;
err_fini:
diff --git a/drivers/gpu/drm/lima/lima_devfreq.h b/drivers/gpu/drm/lima/lima_devfreq.h
index 2d9b3008ce77..c43a2069e5d3 100644
--- a/drivers/gpu/drm/lima/lima_devfreq.h
+++ b/drivers/gpu/drm/lima/lima_devfreq.h
@@ -9,7 +9,6 @@
struct devfreq;
struct opp_table;
-struct thermal_cooling_device;
struct lima_device;
@@ -17,7 +16,6 @@ struct lima_devfreq {
struct devfreq *devfreq;
struct opp_table *clkname_opp_table;
struct opp_table *regulators_opp_table;
- struct thermal_cooling_device *cooling;
ktime_t busy_time;
ktime_t idle_time;
--
2.17.1
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dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
^ permalink raw reply related [flat|nested] 8+ messages in thread
* [PATCH v2 3/4] devfreq/drivers/msm: Use devfreq cooling device registration
2021-03-05 17:03 [PATCH v2 1/4] devfreq: Register devfreq as a cooling device on demand Daniel Lezcano
@ 2021-03-05 17:03 ` Daniel Lezcano
2021-03-05 17:03 ` Daniel Lezcano
` (2 subsequent siblings)
3 siblings, 0 replies; 8+ messages in thread
From: Daniel Lezcano @ 2021-03-05 17:03 UTC (permalink / raw)
To: cwchoi00
Cc: lukasz.luba, linux-kernel, linux-pm, steven.price, Rob Clark,
Sean Paul, David Airlie, Daniel Vetter,
open list:DRM DRIVER FOR MSM ADRENO GPU,
open list:DRM DRIVER FOR MSM ADRENO GPU,
open list:DRM DRIVER FOR MSM ADRENO GPU
The devfreq core code is able to register the devfreq device as a
cooling device if the 'is_cooling_device' flag is set in the profile.
Use this flag and remove the cooling device registering code.
Tested on dragonboard 845c
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
---
drivers/gpu/drm/msm/msm_gpu.c | 12 +-----------
drivers/gpu/drm/msm/msm_gpu.h | 2 --
2 files changed, 1 insertion(+), 13 deletions(-)
diff --git a/drivers/gpu/drm/msm/msm_gpu.c b/drivers/gpu/drm/msm/msm_gpu.c
index ab7c167b0623..eade94271a60 100644
--- a/drivers/gpu/drm/msm/msm_gpu.c
+++ b/drivers/gpu/drm/msm/msm_gpu.c
@@ -14,7 +14,6 @@
#include <generated/utsrelease.h>
#include <linux/string_helpers.h>
#include <linux/devfreq.h>
-#include <linux/devfreq_cooling.h>
#include <linux/devcoredump.h>
#include <linux/sched/task.h>
@@ -82,6 +81,7 @@ static struct devfreq_dev_profile msm_devfreq_profile = {
.target = msm_devfreq_target,
.get_dev_status = msm_devfreq_get_dev_status,
.get_cur_freq = msm_devfreq_get_cur_freq,
+ .is_cooling_device = true,
};
static void msm_devfreq_init(struct msm_gpu *gpu)
@@ -112,14 +112,6 @@ static void msm_devfreq_init(struct msm_gpu *gpu)
}
devfreq_suspend_device(gpu->devfreq.devfreq);
-
- gpu->cooling = of_devfreq_cooling_register(gpu->pdev->dev.of_node,
- gpu->devfreq.devfreq);
- if (IS_ERR(gpu->cooling)) {
- DRM_DEV_ERROR(&gpu->pdev->dev,
- "Couldn't register GPU cooling device\n");
- gpu->cooling = NULL;
- }
}
static int enable_pwrrail(struct msm_gpu *gpu)
@@ -1056,6 +1048,4 @@ void msm_gpu_cleanup(struct msm_gpu *gpu)
if (gpu->worker) {
kthread_destroy_worker(gpu->worker);
}
-
- devfreq_cooling_unregister(gpu->cooling);
}
diff --git a/drivers/gpu/drm/msm/msm_gpu.h b/drivers/gpu/drm/msm/msm_gpu.h
index d7cd02cd2109..93419368bac8 100644
--- a/drivers/gpu/drm/msm/msm_gpu.h
+++ b/drivers/gpu/drm/msm/msm_gpu.h
@@ -155,8 +155,6 @@ struct msm_gpu {
struct msm_gpu_state *crashstate;
/* True if the hardware supports expanded apriv (a650 and newer) */
bool hw_apriv;
-
- struct thermal_cooling_device *cooling;
};
static inline struct msm_gpu *dev_to_gpu(struct device *dev)
--
2.17.1
^ permalink raw reply related [flat|nested] 8+ messages in thread
* [PATCH v2 3/4] devfreq/drivers/msm: Use devfreq cooling device registration
@ 2021-03-05 17:03 ` Daniel Lezcano
0 siblings, 0 replies; 8+ messages in thread
From: Daniel Lezcano @ 2021-03-05 17:03 UTC (permalink / raw)
To: cwchoi00
Cc: open list:DRM DRIVER FOR MSM ADRENO GPU, linux-pm, David Airlie,
open list:DRM DRIVER FOR MSM ADRENO GPU, linux-kernel,
open list:DRM DRIVER FOR MSM ADRENO GPU, steven.price, Sean Paul,
lukasz.luba
The devfreq core code is able to register the devfreq device as a
cooling device if the 'is_cooling_device' flag is set in the profile.
Use this flag and remove the cooling device registering code.
Tested on dragonboard 845c
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
---
drivers/gpu/drm/msm/msm_gpu.c | 12 +-----------
drivers/gpu/drm/msm/msm_gpu.h | 2 --
2 files changed, 1 insertion(+), 13 deletions(-)
diff --git a/drivers/gpu/drm/msm/msm_gpu.c b/drivers/gpu/drm/msm/msm_gpu.c
index ab7c167b0623..eade94271a60 100644
--- a/drivers/gpu/drm/msm/msm_gpu.c
+++ b/drivers/gpu/drm/msm/msm_gpu.c
@@ -14,7 +14,6 @@
#include <generated/utsrelease.h>
#include <linux/string_helpers.h>
#include <linux/devfreq.h>
-#include <linux/devfreq_cooling.h>
#include <linux/devcoredump.h>
#include <linux/sched/task.h>
@@ -82,6 +81,7 @@ static struct devfreq_dev_profile msm_devfreq_profile = {
.target = msm_devfreq_target,
.get_dev_status = msm_devfreq_get_dev_status,
.get_cur_freq = msm_devfreq_get_cur_freq,
+ .is_cooling_device = true,
};
static void msm_devfreq_init(struct msm_gpu *gpu)
@@ -112,14 +112,6 @@ static void msm_devfreq_init(struct msm_gpu *gpu)
}
devfreq_suspend_device(gpu->devfreq.devfreq);
-
- gpu->cooling = of_devfreq_cooling_register(gpu->pdev->dev.of_node,
- gpu->devfreq.devfreq);
- if (IS_ERR(gpu->cooling)) {
- DRM_DEV_ERROR(&gpu->pdev->dev,
- "Couldn't register GPU cooling device\n");
- gpu->cooling = NULL;
- }
}
static int enable_pwrrail(struct msm_gpu *gpu)
@@ -1056,6 +1048,4 @@ void msm_gpu_cleanup(struct msm_gpu *gpu)
if (gpu->worker) {
kthread_destroy_worker(gpu->worker);
}
-
- devfreq_cooling_unregister(gpu->cooling);
}
diff --git a/drivers/gpu/drm/msm/msm_gpu.h b/drivers/gpu/drm/msm/msm_gpu.h
index d7cd02cd2109..93419368bac8 100644
--- a/drivers/gpu/drm/msm/msm_gpu.h
+++ b/drivers/gpu/drm/msm/msm_gpu.h
@@ -155,8 +155,6 @@ struct msm_gpu {
struct msm_gpu_state *crashstate;
/* True if the hardware supports expanded apriv (a650 and newer) */
bool hw_apriv;
-
- struct thermal_cooling_device *cooling;
};
static inline struct msm_gpu *dev_to_gpu(struct device *dev)
--
2.17.1
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
^ permalink raw reply related [flat|nested] 8+ messages in thread
* [PATCH v2 4/4] devfreq/drivers/panfrost: Use devfreq cooling device registration
2021-03-05 17:03 [PATCH v2 1/4] devfreq: Register devfreq as a cooling device on demand Daniel Lezcano
@ 2021-03-05 17:03 ` Daniel Lezcano
2021-03-05 17:03 ` Daniel Lezcano
` (2 subsequent siblings)
3 siblings, 0 replies; 8+ messages in thread
From: Daniel Lezcano @ 2021-03-05 17:03 UTC (permalink / raw)
To: cwchoi00
Cc: lukasz.luba, linux-kernel, linux-pm, steven.price, Rob Herring,
Tomeu Vizoso, Alyssa Rosenzweig, David Airlie, Daniel Vetter,
open list:ARM MALI PANFROST DRM DRIVER
The devfreq core code is able to register the devfreq device as a
cooling device if the 'is_cooling_device' flag is set in the profile.
Use this flag and remove the cooling device registering code.
Tested on rock960.
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
---
drivers/gpu/drm/panfrost/panfrost_devfreq.c | 14 +-------------
drivers/gpu/drm/panfrost/panfrost_devfreq.h | 3 ---
2 files changed, 1 insertion(+), 16 deletions(-)
diff --git a/drivers/gpu/drm/panfrost/panfrost_devfreq.c b/drivers/gpu/drm/panfrost/panfrost_devfreq.c
index 56b3f5935703..4d96edf1bc54 100644
--- a/drivers/gpu/drm/panfrost/panfrost_devfreq.c
+++ b/drivers/gpu/drm/panfrost/panfrost_devfreq.c
@@ -3,7 +3,6 @@
#include <linux/clk.h>
#include <linux/devfreq.h>
-#include <linux/devfreq_cooling.h>
#include <linux/platform_device.h>
#include <linux/pm_opp.h>
@@ -80,6 +79,7 @@ static struct devfreq_dev_profile panfrost_devfreq_profile = {
.polling_ms = 50, /* ~3 frames */
.target = panfrost_devfreq_target,
.get_dev_status = panfrost_devfreq_get_dev_status,
+ .is_cooling_device = true,
};
int panfrost_devfreq_init(struct panfrost_device *pfdev)
@@ -90,7 +90,6 @@ int panfrost_devfreq_init(struct panfrost_device *pfdev)
struct device *dev = &pfdev->pdev->dev;
struct devfreq *devfreq;
struct opp_table *opp_table;
- struct thermal_cooling_device *cooling;
struct panfrost_devfreq *pfdevfreq = &pfdev->pfdevfreq;
opp_table = dev_pm_opp_set_regulators(dev, pfdev->comp->supply_names,
@@ -139,12 +138,6 @@ int panfrost_devfreq_init(struct panfrost_device *pfdev)
}
pfdevfreq->devfreq = devfreq;
- cooling = devfreq_cooling_em_register(devfreq, NULL);
- if (IS_ERR(cooling))
- DRM_DEV_INFO(dev, "Failed to register cooling device\n");
- else
- pfdevfreq->cooling = cooling;
-
return 0;
err_fini:
@@ -156,11 +149,6 @@ void panfrost_devfreq_fini(struct panfrost_device *pfdev)
{
struct panfrost_devfreq *pfdevfreq = &pfdev->pfdevfreq;
- if (pfdevfreq->cooling) {
- devfreq_cooling_unregister(pfdevfreq->cooling);
- pfdevfreq->cooling = NULL;
- }
-
if (pfdevfreq->opp_of_table_added) {
dev_pm_opp_of_remove_table(&pfdev->pdev->dev);
pfdevfreq->opp_of_table_added = false;
diff --git a/drivers/gpu/drm/panfrost/panfrost_devfreq.h b/drivers/gpu/drm/panfrost/panfrost_devfreq.h
index db6ea48e21f9..470f5c974703 100644
--- a/drivers/gpu/drm/panfrost/panfrost_devfreq.h
+++ b/drivers/gpu/drm/panfrost/panfrost_devfreq.h
@@ -9,14 +9,11 @@
struct devfreq;
struct opp_table;
-struct thermal_cooling_device;
-
struct panfrost_device;
struct panfrost_devfreq {
struct devfreq *devfreq;
struct opp_table *regulators_opp_table;
- struct thermal_cooling_device *cooling;
bool opp_of_table_added;
ktime_t busy_time;
--
2.17.1
^ permalink raw reply related [flat|nested] 8+ messages in thread
* [PATCH v2 4/4] devfreq/drivers/panfrost: Use devfreq cooling device registration
@ 2021-03-05 17:03 ` Daniel Lezcano
0 siblings, 0 replies; 8+ messages in thread
From: Daniel Lezcano @ 2021-03-05 17:03 UTC (permalink / raw)
To: cwchoi00
Cc: Tomeu Vizoso, linux-pm, David Airlie, linux-kernel,
open list:ARM MALI PANFROST DRM DRIVER, steven.price,
Alyssa Rosenzweig, lukasz.luba
The devfreq core code is able to register the devfreq device as a
cooling device if the 'is_cooling_device' flag is set in the profile.
Use this flag and remove the cooling device registering code.
Tested on rock960.
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
---
drivers/gpu/drm/panfrost/panfrost_devfreq.c | 14 +-------------
drivers/gpu/drm/panfrost/panfrost_devfreq.h | 3 ---
2 files changed, 1 insertion(+), 16 deletions(-)
diff --git a/drivers/gpu/drm/panfrost/panfrost_devfreq.c b/drivers/gpu/drm/panfrost/panfrost_devfreq.c
index 56b3f5935703..4d96edf1bc54 100644
--- a/drivers/gpu/drm/panfrost/panfrost_devfreq.c
+++ b/drivers/gpu/drm/panfrost/panfrost_devfreq.c
@@ -3,7 +3,6 @@
#include <linux/clk.h>
#include <linux/devfreq.h>
-#include <linux/devfreq_cooling.h>
#include <linux/platform_device.h>
#include <linux/pm_opp.h>
@@ -80,6 +79,7 @@ static struct devfreq_dev_profile panfrost_devfreq_profile = {
.polling_ms = 50, /* ~3 frames */
.target = panfrost_devfreq_target,
.get_dev_status = panfrost_devfreq_get_dev_status,
+ .is_cooling_device = true,
};
int panfrost_devfreq_init(struct panfrost_device *pfdev)
@@ -90,7 +90,6 @@ int panfrost_devfreq_init(struct panfrost_device *pfdev)
struct device *dev = &pfdev->pdev->dev;
struct devfreq *devfreq;
struct opp_table *opp_table;
- struct thermal_cooling_device *cooling;
struct panfrost_devfreq *pfdevfreq = &pfdev->pfdevfreq;
opp_table = dev_pm_opp_set_regulators(dev, pfdev->comp->supply_names,
@@ -139,12 +138,6 @@ int panfrost_devfreq_init(struct panfrost_device *pfdev)
}
pfdevfreq->devfreq = devfreq;
- cooling = devfreq_cooling_em_register(devfreq, NULL);
- if (IS_ERR(cooling))
- DRM_DEV_INFO(dev, "Failed to register cooling device\n");
- else
- pfdevfreq->cooling = cooling;
-
return 0;
err_fini:
@@ -156,11 +149,6 @@ void panfrost_devfreq_fini(struct panfrost_device *pfdev)
{
struct panfrost_devfreq *pfdevfreq = &pfdev->pfdevfreq;
- if (pfdevfreq->cooling) {
- devfreq_cooling_unregister(pfdevfreq->cooling);
- pfdevfreq->cooling = NULL;
- }
-
if (pfdevfreq->opp_of_table_added) {
dev_pm_opp_of_remove_table(&pfdev->pdev->dev);
pfdevfreq->opp_of_table_added = false;
diff --git a/drivers/gpu/drm/panfrost/panfrost_devfreq.h b/drivers/gpu/drm/panfrost/panfrost_devfreq.h
index db6ea48e21f9..470f5c974703 100644
--- a/drivers/gpu/drm/panfrost/panfrost_devfreq.h
+++ b/drivers/gpu/drm/panfrost/panfrost_devfreq.h
@@ -9,14 +9,11 @@
struct devfreq;
struct opp_table;
-struct thermal_cooling_device;
-
struct panfrost_device;
struct panfrost_devfreq {
struct devfreq *devfreq;
struct opp_table *regulators_opp_table;
- struct thermal_cooling_device *cooling;
bool opp_of_table_added;
ktime_t busy_time;
--
2.17.1
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
^ permalink raw reply related [flat|nested] 8+ messages in thread
* Re: [PATCH v2 1/4] devfreq: Register devfreq as a cooling device on demand
2021-03-05 17:03 [PATCH v2 1/4] devfreq: Register devfreq as a cooling device on demand Daniel Lezcano
` (2 preceding siblings ...)
2021-03-05 17:03 ` Daniel Lezcano
@ 2021-03-06 0:39 ` Chanwoo Choi
3 siblings, 0 replies; 8+ messages in thread
From: Chanwoo Choi @ 2021-03-06 0:39 UTC (permalink / raw)
To: Daniel Lezcano
Cc: lukasz.luba, linux-kernel, linux-pm, steven.price, MyungJoo Ham,
Kyungmin Park, Chanwoo Choi
Hi,
On 21. 3. 6. 오전 2:03, Daniel Lezcano wrote:
> Currently the default behavior is to manually having the devfreq
> backend to register themselves as a devfreq cooling device.
>
> Instead of adding the code in the drivers for the thermal cooling
> device registering, let's provide a flag in the devfreq's profile to
> tell the common devfreq code to register the newly created devfreq as
> a cooling device.
>
> Suggested-by: Chanwoo Choi <cwchoi00@gmail.com>
> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
> ---
> drivers/devfreq/devfreq.c | 11 +++++++++++
> include/linux/devfreq.h | 7 +++++++
> 2 files changed, 18 insertions(+)
>
> diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c
> index b6d63f02d293..5c0fdd3a48d2 100644
> --- a/drivers/devfreq/devfreq.c
> +++ b/drivers/devfreq/devfreq.c
> @@ -11,6 +11,7 @@
> #include <linux/kmod.h>
> #include <linux/sched.h>
> #include <linux/debugfs.h>
> +#include <linux/devfreq_cooling.h>
> #include <linux/errno.h>
> #include <linux/err.h>
> #include <linux/init.h>
> @@ -26,6 +27,7 @@
> #include <linux/hrtimer.h>
> #include <linux/of.h>
> #include <linux/pm_qos.h>
> +#include <linux/thermal.h> > #include <linux/units.h>
Acutally, current devfreq-next branch doesn't contain previous
your patch about units clean-up. So that when I applied it to next
branch, merge conflict happen because of '<linux/units.h>'.
Just send the patches again regardless of 'devfreq: Use HZ macros'.
> #include "governor.h"
>
> @@ -935,6 +937,13 @@ struct devfreq *devfreq_add_device(struct device *dev,
>
> mutex_unlock(&devfreq_list_lock);
>
> + if (devfreq->profile->is_cooling_device) {
> + devfreq->cdev = devfreq_cooling_em_register(devfreq, NULL);
> + if (IS_ERR(devfreq->cdev))
> + dev_info(dev, "Failed to register devfreq "
> + "cooling device\n");
Have to initialize devfreq->cdev by NULL when error happen.
Because of just returning from thermal_cooling_device_unregister
when cdev is not used.
> + }
> +
> return devfreq;
>
> err_init:
> @@ -960,6 +969,8 @@ int devfreq_remove_device(struct devfreq *devfreq)
> if (!devfreq)
> return -EINVAL;
>
> + thermal_cooling_device_unregister(devfreq->cdev);
> +
> if (devfreq->governor) {
> devfreq->governor->event_handler(devfreq,
> DEVFREQ_GOV_STOP, NULL);
> diff --git a/include/linux/devfreq.h b/include/linux/devfreq.h
> index 26ea0850be9b..554e7904b0c5 100644
> --- a/include/linux/devfreq.h
> +++ b/include/linux/devfreq.h
> @@ -98,11 +98,15 @@ struct devfreq_dev_status {
> * @freq_table: Optional list of frequencies to support statistics
> * and freq_table must be generated in ascending order.
> * @max_state: The size of freq_table.
> + *
> + * @is_cooling_device: A self-explanatory boolean giving the device a
> + * cooling effect property.
> */
> struct devfreq_dev_profile {
> unsigned long initial_freq;
> unsigned int polling_ms;
> enum devfreq_timer timer;
> + bool is_cooling_device;
>
> int (*target)(struct device *dev, unsigned long *freq, u32 flags);
> int (*get_dev_status)(struct device *dev,
> @@ -198,6 +202,9 @@ struct devfreq {
>
> struct srcu_notifier_head transition_notifier_list;
>
> + /* Pointer to the cooling device if used for thermal mitigation */ > + struct thermal_cooling_device *cdev;
> +
You need to the description of cdev instance to 'struct devfreq'.
> struct notifier_block nb_min;
> struct notifier_block nb_max;
> };
>
--
Best Regards,
Samsung Electronics
Chanwoo Choi
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