Introduce DRM_WEDGE_RECOVERY_COLD_RESET (BIT(4)) recovery method to handle scenarios requiring device power cycle.
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 device power cycle can recover the device from its current error state. Signed-off-by: Mallesh Koujalagi <[email protected]> Reviewed-by: Raag Jadav <[email protected]> --- v3: - Update any scenario that requires cold-reset. (Riana) v4: - Rename cold reset to power cycle. (Raag) v5: - Make it consistent with consumer expectations. (Raag) v6: - Drop "last resort" wording. (Riana) --- 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 1ff0bf7cba6a..94abe7a811a5 100644 --- a/drivers/gpu/drm/drm_drv.c +++ b/drivers/gpu/drm/drm_drv.c @@ -537,6 +537,8 @@ 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 768a8dae83c5..75f030d027ee 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) /* remove device + slot power cycle + rescan */ /** * struct drm_wedge_task_info - information about the guilty task of a wedge dev -- 2.34.1
