1 // SPDX-License-Identifier: MIT
3  * Copyright © 2013-2021 Intel Corporation
16 		return -ENODEV;  in gen6_check_mailbox_status()
18 		return -ENXIO;  in gen6_check_mailbox_status()
21 		return -EOVERFLOW;  in gen6_check_mailbox_status()
23 		return -ETIMEDOUT;  in gen6_check_mailbox_status()
36 		return -ENXIO;  in gen7_check_mailbox_status()
38 		return -ETIMEDOUT;  in gen7_check_mailbox_status()
40 		return -EINVAL;  in gen7_check_mailbox_status()
42 		return -ENXIO;  in gen7_check_mailbox_status()
44 		return -EBUSY;  in gen7_check_mailbox_status()
46 		return -EACCES;  in gen7_check_mailbox_status()
48 		return -EOVERFLOW;  in gen7_check_mailbox_status()
60 	lockdep_assert_held(&uncore->i915->sb_lock);  in __snb_pcode_rw()
69 		return -EAGAIN;  in __snb_pcode_rw()
82 		return -ETIMEDOUT;  in __snb_pcode_rw()
89 	if (GRAPHICS_VER(uncore->i915) > 6)  in __snb_pcode_rw()
99 	mutex_lock(&uncore->i915->sb_lock);  in snb_pcode_read()
101 	mutex_unlock(&uncore->i915->sb_lock);  in snb_pcode_read()
104 		drm_dbg(&uncore->i915->drm,  in snb_pcode_read()
117 	mutex_lock(&uncore->i915->sb_lock);  in snb_pcode_write_timeout()
120 	mutex_unlock(&uncore->i915->sb_lock);  in snb_pcode_write_timeout()
123 		drm_dbg(&uncore->i915->drm,  in snb_pcode_write_timeout()
141  * skl_pcode_request - send PCODE request until acknowledgment
156  * Returns 0 on success, %-ETIMEDOUT in case of a timeout, <0 in case of some
165 	mutex_lock(&uncore->i915->sb_lock);  in skl_pcode_request()
185 	 * The above can time out if the number of requests was low (2 in the  in skl_pcode_request()
189 	 * requests. Increase the timeout from @timeout_base_ms to 50ms to  in skl_pcode_request()
191 	 * requests, and for any quirks of the PCODE firmware that delays  in skl_pcode_request()
194 	drm_dbg_kms(&uncore->i915->drm,  in skl_pcode_request()
196 	drm_WARN_ON_ONCE(&uncore->i915->drm, timeout_base_ms > 3);  in skl_pcode_request()
202 	mutex_unlock(&uncore->i915->sb_lock);  in skl_pcode_request()
209 	if (!IS_DGFX(uncore->i915))  in intel_pcode_init()
228 	with_intel_runtime_pm(uncore->rpm, wakeref)  in snb_pcode_read_p()
244 	with_intel_runtime_pm(uncore->rpm, wakeref)  in snb_pcode_write_p()