[PATCH v3 2/4] drm: Add DRM_WEDGE_RECOVERY_COLD_RESET recovery method

[Mallesh Koujalagi <mallesh.koujalagi@intel.com>]

Introduce DRM_WEDGE_RECOVERY_COLD_RESET (BIT(4)) recovery
method to handle scenarios requiring complete cold reset.

This method addresses cases where other recovery mechanisms
(driver reload, PCIe reset, etc.) are insufficient to restore
device functionality. When set, it indicates to userspace that
only a full cold reset can recover the device from its current
error state. The cold reset method serves as a last resort
when all other recovery options have been exhausted.

v3:
- Update any scenario that requires cold-reset. (Riana)

Signed-off-by: Mallesh Koujalagi <mallesh.koujalagi@intel.com>
---
 drivers/gpu/drm/drm_drv.c | 2 ++
 include/drm/drm_device.h  | 1 +
 2 files changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c
index 985c283cf59f..8c0236e2e6a6 100644
--- a/drivers/gpu/drm/drm_drv.c
+++ b/drivers/gpu/drm/drm_drv.c
@@ -535,6 +535,8 @@ static const char *drm_get_wedge_recovery(unsigned int opt)
 		return "bus-reset";
 	case DRM_WEDGE_RECOVERY_VENDOR:
 		return "vendor-specific";
+	case DRM_WEDGE_RECOVERY_COLD_RESET:
+		return "cold-reset";
 	default:
 		return NULL;
 	}
diff --git a/include/drm/drm_device.h b/include/drm/drm_device.h
index bc78fb77cc27..3e386eb42023 100644
--- a/include/drm/drm_device.h
+++ b/include/drm/drm_device.h
@@ -37,6 +37,7 @@ struct pci_controller;
 #define DRM_WEDGE_RECOVERY_REBIND	BIT(1)	/* unbind + bind driver */
 #define DRM_WEDGE_RECOVERY_BUS_RESET	BIT(2)	/* unbind + reset bus device + bind */
 #define DRM_WEDGE_RECOVERY_VENDOR	BIT(3)	/* vendor specific recovery method */
+#define DRM_WEDGE_RECOVERY_COLD_RESET	BIT(4)	/* full device cold reset */
 
 /**
  * struct drm_wedge_task_info - information about the guilty task of a wedge dev
-- 
2.34.1