drm/i915: Enable Engine reset and recovery support

This feature is made available only from Gen8, for previous gen devices
driver uses legacy full gpu reset.

Cc: Chris Wilson <[email protected]>
Cc: Mika Kuoppala <[email protected]>
Signed-off-by: Tomas Elf <[email protected]>
Signed-off-by: Arun Siluvery <[email protected]>
Signed-off-by: Michel Thierry <[email protected]>
Link: http://patchwork.freedesktop.org/patch/msgid/[email protected]
Reviewed-by: Chris Wilson <[email protected]>
Signed-off-by: Chris Wilson <[email protected]>
Link: http://patchwork.freedesktop.org/patch/msgid/[email protected]

Author: mthierry

drivers/gpu/drm/i915/i915_params.c

@@ -46,7 +46,7 @@ struct i915_params i915 __read_mostly = {
 	.prefault_disable = 0,
 	.load_detect_test = 0,
 	.force_reset_modeset_test = 0,
-	.reset = 1,
+	.reset = 2,
 	.error_capture = true,
 	.invert_brightness = 0,
 	.disable_display = 0,
@@ -116,7 +116,7 @@ MODULE_PARM_DESC(vbt_sdvo_panel_type,
 	"(-2=ignore, -1=auto [default], index in VBT BIOS table)");
 
 module_param_named_unsafe(reset, i915.reset, int, 0600);
-MODULE_PARM_DESC(reset, "Attempt GPU resets (0=disabled, 1=full gpu reset [default], 2=engine reset)");
+MODULE_PARM_DESC(reset, "Attempt GPU resets (0=disabled, 1=full gpu reset, 2=engine reset [default])");
 
 #if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR)
 module_param_named(error_capture, i915.error_capture, bool, 0600);