diff options
| author | Todor Tomov <todor.tomov@linaro.org> | 2018-07-25 12:38:27 -0400 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+samsung@kernel.org> | 2018-08-02 06:23:18 -0400 |
| commit | 02afa816dbbf0bc648d22a8472f17236df886af5 (patch) | |
| tree | d40b611777cc806dd3581e877b34f1cc03fe529f /drivers/media/platform/qcom/camss/camss-vfe.c | |
| parent | 9c3e59de6041f84294fbead39c85b5541ac7b361 (diff) | |
| download | linux-02afa816dbbf0bc648d22a8472f17236df886af5.tar.bz2 | |
media: camss: Add basic runtime PM support
There is a PM domain for each of the VFE hardware modules. Add
support for basic runtime PM support to be able to control the
PM domains. When a PM domain needs to be powered on - a device
link is created. When a PM domain needs to be powered off -
its device link is removed. This allows separate and
independent control of the PM domains.
Suspend/Resume is still not supported.
Signed-off-by: Todor Tomov <todor.tomov@linaro.org>
Signed-off-by: Hans Verkuil <hansverk@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Diffstat (limited to 'drivers/media/platform/qcom/camss/camss-vfe.c')
| -rw-r--r-- | drivers/media/platform/qcom/camss/camss-vfe.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/media/platform/qcom/camss/camss-vfe.c b/drivers/media/platform/qcom/camss/camss-vfe.c index 3f589c448cd2..474e1dd02891 100644 --- a/drivers/media/platform/qcom/camss/camss-vfe.c +++ b/drivers/media/platform/qcom/camss/camss-vfe.c @@ -15,6 +15,7 @@ #include <linux/mutex.h> #include <linux/of.h> #include <linux/platform_device.h> +#include <linux/pm_runtime.h> #include <linux/spinlock_types.h> #include <linux/spinlock.h> #include <media/media-entity.h> @@ -1981,6 +1982,14 @@ static int vfe_get(struct vfe_device *vfe) mutex_lock(&vfe->power_lock); if (vfe->power_count == 0) { + ret = camss_pm_domain_on(vfe->camss, vfe->id); + if (ret < 0) + goto error_pm_domain; + + ret = pm_runtime_get_sync(vfe->camss->dev); + if (ret < 0) + goto error_pm_runtime_get; + ret = vfe_set_clock_rates(vfe); if (ret < 0) goto error_clocks; @@ -2012,6 +2021,12 @@ error_reset: camss_disable_clocks(vfe->nclocks, vfe->clock); error_clocks: + pm_runtime_put_sync(vfe->camss->dev); + +error_pm_runtime_get: + camss_pm_domain_off(vfe->camss, vfe->id); + +error_pm_domain: mutex_unlock(&vfe->power_lock); return ret; @@ -2034,6 +2049,8 @@ static void vfe_put(struct vfe_device *vfe) vfe_halt(vfe); } camss_disable_clocks(vfe->nclocks, vfe->clock); + pm_runtime_put_sync(vfe->camss->dev); + camss_pm_domain_off(vfe->camss, vfe->id); } vfe->power_count--; |