diff options
| -rw-r--r-- | drivers/gpu/drm/tiny/appletbdrm.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/drivers/gpu/drm/tiny/appletbdrm.c b/drivers/gpu/drm/tiny/appletbdrm.c index 4297d9c1125e..350dc598c9e7 100644 --- a/drivers/gpu/drm/tiny/appletbdrm.c +++ b/drivers/gpu/drm/tiny/appletbdrm.c @@ -30,6 +30,7 @@ #include <drm/drm_gem_atomic_helper.h> #include <drm/drm_gem_framebuffer_helper.h> #include <drm/drm_gem_shmem_helper.h> +#include <drm/drm_modeset_helper.h> #include <drm/drm_plane.h> #include <drm/drm_print.h> #include <drm/drm_probe_helper.h> @@ -821,6 +822,48 @@ static void appletbdrm_shutdown(struct usb_interface *intf) drm_atomic_helper_shutdown(&adev->drm); } +static int appletbdrm_suspend(struct usb_interface *intf, pm_message_t message) +{ + struct appletbdrm_device *adev = usb_get_intfdata(intf); + + return drm_mode_config_helper_suspend(&adev->drm); +} + +static int appletbdrm_resume(struct usb_interface *intf) +{ + struct appletbdrm_device *adev = usb_get_intfdata(intf); + + return drm_mode_config_helper_resume(&adev->drm); +} + +static int appletbdrm_reset_resume(struct usb_interface *intf) +{ + struct appletbdrm_device *adev = usb_get_intfdata(intf); + struct drm_device *drm = &adev->drm; + int ret, resume_ret; + + /* + * A reset puts the device back into its initial state, where it + * expects the same handshake as during probe. Resume the DRM side + * even if the handshake fails, so that the state saved on suspend + * is released. + */ + ret = appletbdrm_get_information(adev); + if (ret) { + drm_err(drm, "Failed to get display information\n"); + goto resume; + } + + ret = appletbdrm_signal_readiness(adev); + if (ret) + drm_err(drm, "Failed to signal readiness\n"); + +resume: + resume_ret = drm_mode_config_helper_resume(drm); + + return ret ? ret : resume_ret; +} + static const struct usb_device_id appletbdrm_usb_id_table[] = { { USB_DEVICE_INTERFACE_CLASS(0x05ac, 0x8302, USB_CLASS_AUDIO_VIDEO) }, {} @@ -832,6 +875,9 @@ static struct usb_driver appletbdrm_usb_driver = { .probe = appletbdrm_probe, .disconnect = appletbdrm_disconnect, .shutdown = appletbdrm_shutdown, + .suspend = appletbdrm_suspend, + .resume = appletbdrm_resume, + .reset_resume = appletbdrm_reset_resume, .id_table = appletbdrm_usb_id_table, }; module_usb_driver(appletbdrm_usb_driver); |