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-csiphy.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-csiphy.c')
| -rw-r--r-- | drivers/media/platform/qcom/camss/camss-csiphy.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/drivers/media/platform/qcom/camss/camss-csiphy.c b/drivers/media/platform/qcom/camss/camss-csiphy.c index 0383e94996a3..4aeaedb69786 100644 --- a/drivers/media/platform/qcom/camss/camss-csiphy.c +++ b/drivers/media/platform/qcom/camss/camss-csiphy.c @@ -13,6 +13,7 @@ #include <linux/kernel.h> #include <linux/of.h> #include <linux/platform_device.h> +#include <linux/pm_runtime.h> #include <media/media-entity.h> #include <media/v4l2-device.h> #include <media/v4l2-subdev.h> @@ -240,13 +241,21 @@ static int csiphy_set_power(struct v4l2_subdev *sd, int on) u8 hw_version; int ret; - ret = csiphy_set_clock_rates(csiphy); + ret = pm_runtime_get_sync(dev); if (ret < 0) return ret; + ret = csiphy_set_clock_rates(csiphy); + if (ret < 0) { + pm_runtime_put_sync(dev); + return ret; + } + ret = camss_enable_clocks(csiphy->nclocks, csiphy->clock, dev); - if (ret < 0) + if (ret < 0) { + pm_runtime_put_sync(dev); return ret; + } enable_irq(csiphy->irq); @@ -259,6 +268,8 @@ static int csiphy_set_power(struct v4l2_subdev *sd, int on) disable_irq(csiphy->irq); camss_disable_clocks(csiphy->nclocks, csiphy->clock); + + pm_runtime_put_sync(dev); } return 0; |