diff options
| author | Robby Cai <robby.cai@nxp.com> | 2017-11-22 18:58:59 +0800 |
|---|---|---|
| committer | Leonard Crestez <leonard.crestez@nxp.com> | 2018-08-24 12:41:33 +0300 |
| commit | ed2f206069e31fd97f8a836000958e071fb87a15 (patch) | |
| tree | ca0e3e00084258443f02bf166aca5adab419aba6 /drivers/media/platform/imx8 | |
| parent | 4db1b8b464fb0575561883339f29791607acaf30 (diff) | |
MLK-16943 mipi-csi: Add run time pm support
Add run time PM support for MIPI CSI (tested on iMX8MQ)
Signed-off-by: Robby Cai <robby.cai@nxp.com>
Reviewed-by: Sandor Yu <Sandor.yu@nxp.com>
Diffstat (limited to 'drivers/media/platform/imx8')
| -rw-r--r-- | drivers/media/platform/imx8/mxc-mipi-csi2_yav.c | 39 |
1 files changed, 35 insertions, 4 deletions
diff --git a/drivers/media/platform/imx8/mxc-mipi-csi2_yav.c b/drivers/media/platform/imx8/mxc-mipi-csi2_yav.c index a8b89e745007..01fc53e9cf27 100644 --- a/drivers/media/platform/imx8/mxc-mipi-csi2_yav.c +++ b/drivers/media/platform/imx8/mxc-mipi-csi2_yav.c @@ -316,6 +316,7 @@ static int mipi_csi2_s_power(struct v4l2_subdev *sd, int on) static int mipi_csi2_s_stream(struct v4l2_subdev *sd, int enable) { struct mxc_mipi_csi2_dev *csi2dev = sd_to_mxc_mipi_csi2_dev(sd); + struct device *dev = &csi2dev->pdev->dev; struct v4l2_subdev *sensor_sd = csi2dev->sensor_sd; int ret = 0; @@ -324,21 +325,23 @@ static int mipi_csi2_s_stream(struct v4l2_subdev *sd, int enable) if (enable) { if (!csi2dev->running) { + pm_runtime_get_sync(dev); mxc_mipi_csi2_phy_reset(csi2dev); mxc_mipi_csi2_hc_config(csi2dev); mxc_mipi_csi2_enable(csi2dev); mxc_mipi_csi2_reg_dump(csi2dev); - v4l2_subdev_call(sensor_sd, video, s_stream, true); } + v4l2_subdev_call(sensor_sd, video, s_stream, true); csi2dev->running++; } else { - if (csi2dev->running) { - v4l2_subdev_call(sensor_sd, video, s_stream, false); + v4l2_subdev_call(sensor_sd, video, s_stream, false); + csi2dev->running--; + if (!csi2dev->running) { + pm_runtime_put(dev); mxc_mipi_csi2_disable(csi2dev); } - csi2dev->running--; } return ret; @@ -615,6 +618,7 @@ static int mipi_csi2_probe(struct platform_device *pdev) csi2dev->running = 0; csi2dev->flags = MXC_MIPI_CSI2_PM_POWERED; + pm_runtime_enable(&pdev->dev); return 0; @@ -631,6 +635,30 @@ static int mipi_csi2_remove(struct platform_device *pdev) struct mxc_mipi_csi2_dev *csi2dev = sd_to_mxc_mipi_csi2_dev(sd); mipi_csi2_clk_disable(csi2dev); + pm_runtime_disable(&pdev->dev); + + return 0; +} + +static int mipi_csi2_pm_runtime_resume(struct device *dev) +{ + struct mxc_mipi_csi2_dev *csi2dev = dev_get_drvdata(dev); + int ret; + + ret = mipi_csi2_clk_enable(csi2dev); + if (ret < 0) { + dev_info(dev, "%s:%d fail\n", __func__, __LINE__); + return -EAGAIN; + } + + return 0; +} + +static int mipi_csi2_runtime_pm_suspend(struct device *dev) +{ + struct mxc_mipi_csi2_dev *csi2dev = dev_get_drvdata(dev); + + mipi_csi2_clk_disable(csi2dev); return 0; } @@ -677,6 +705,9 @@ static int mipi_csi2_pm_resume(struct device *dev) static const struct dev_pm_ops mipi_csi_pm_ops = { SET_SYSTEM_SLEEP_PM_OPS(mipi_csi2_pm_suspend, mipi_csi2_pm_resume) + SET_RUNTIME_PM_OPS(mipi_csi2_runtime_pm_suspend, + mipi_csi2_pm_runtime_resume, + NULL) }; static const struct of_device_id mipi_csi2_of_match[] = { |