| Message ID | 1398785339-8107-1-git-send-email-thierry.reding@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On 04/29/2014 09:28 AM, Thierry Reding wrote: > From: Thierry Reding <treding@nvidia.com> > > Hook up the MIPI DSI bus's .shutdown() function to allow drivers to > implement code that should be run when a device is shut down. The series, Tested-by: Stephen Warren <swarren@nvidia.com> (On an NVIDIA Tegra Dalmore board. Now, the backlight actually turns off when the system is shut down. Note that the backlight power on this system is directly sourced from the AC adapter for some strange reason, rather than passing through the main system PMIC, and hence backlight power isn't shut off even when the rest of the system really is powered off) -- To unsubscribe from this list: send the line "unsubscribe linux-fbdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/gpu/drm/drm_mipi_dsi.c b/drivers/gpu/drm/drm_mipi_dsi.c index 09821f46d768..e633df2f68d8 100644 --- a/drivers/gpu/drm/drm_mipi_dsi.c +++ b/drivers/gpu/drm/drm_mipi_dsi.c @@ -282,6 +282,14 @@ static int mipi_dsi_drv_remove(struct device *dev) return drv->remove(dsi); } +static void mipi_dsi_drv_shutdown(struct device *dev) +{ + struct mipi_dsi_driver *drv = to_mipi_dsi_driver(dev->driver); + struct mipi_dsi_device *dsi = to_mipi_dsi_device(dev); + + drv->shutdown(dsi); +} + /** * mipi_dsi_driver_register - register a driver for DSI devices * @drv: DSI driver structure @@ -293,6 +301,8 @@ int mipi_dsi_driver_register(struct mipi_dsi_driver *drv) drv->driver.probe = mipi_dsi_drv_probe; if (drv->remove) drv->driver.remove = mipi_dsi_drv_remove; + if (drv->shutdown) + drv->driver.shutdown = mipi_dsi_drv_shutdown; return driver_register(&drv->driver); } diff --git a/include/drm/drm_mipi_dsi.h b/include/drm/drm_mipi_dsi.h index 7209df15a3cd..944f33f8ba38 100644 --- a/include/drm/drm_mipi_dsi.h +++ b/include/drm/drm_mipi_dsi.h @@ -135,11 +135,13 @@ ssize_t mipi_dsi_dcs_read(struct mipi_dsi_device *dsi, unsigned int channel, * @driver: device driver model driver * @probe: callback for device binding * @remove: callback for device unbinding + * @shutdown: called at shutdown time to quiesce the device */ struct mipi_dsi_driver { struct device_driver driver; int(*probe)(struct mipi_dsi_device *dsi); int(*remove)(struct mipi_dsi_device *dsi); + void (*shutdown)(struct mipi_dsi_device *dsi); }; #define to_mipi_dsi_driver(d) container_of(d, struct mipi_dsi_driver, driver)