From 5a9cfff46d193388749f2c4e6ec75f40b47942d2 Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Fri, 28 Jul 2017 09:50:22 +0100
Subject: [PATCH] drm/i915: Include mbox details for pcode read/write failures
Git-commit: 5a9cfff46d193388749f2c4e6ec75f40b47942d2
Patch-mainline: v4.14-rc1
References: FATE#322643 bsc#1055900
If we fail at punit communication, include both the mbox address and the
value we tried to write so that we can identify the invalid sequence.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20170728085022.1586-1-chris@chris-wilson.co.uk
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/gpu/drm/i915/intel_pm.c | 21 +++++++++++++--------
1 file changed, 13 insertions(+), 8 deletions(-)
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -8831,6 +8831,7 @@ static inline int gen6_check_mailbox_sta
case GEN6_PCODE_SUCCESS:
return 0;
case GEN6_PCODE_UNIMPLEMENTED_CMD:
+ return -ENODEV;
case GEN6_PCODE_ILLEGAL_CMD:
return -ENXIO;
case GEN6_PCODE_MIN_FREQ_TABLE_GT_RATIO_OUT_OF_RANGE:
@@ -8878,7 +8879,8 @@ int sandybridge_pcode_read(struct drm_i9
*/
if (I915_READ_FW(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) {
- DRM_DEBUG_DRIVER("warning: pcode (read) mailbox access failed\n");
+ DRM_DEBUG_DRIVER("warning: pcode (read from mbox %x) mailbox access failed for %ps\n",
+ mbox, __builtin_return_address(0));
return -EAGAIN;
}
@@ -8889,7 +8891,8 @@ int sandybridge_pcode_read(struct drm_i9
if (__intel_wait_for_register_fw(dev_priv,
GEN6_PCODE_MAILBOX, GEN6_PCODE_READY, 0,
500, 0, NULL)) {
- DRM_ERROR("timeout waiting for pcode read (%d) to finish\n", mbox);
+ DRM_ERROR("timeout waiting for pcode read (from mbox %x) to finish for %ps\n",
+ mbox, __builtin_return_address(0));
return -ETIMEDOUT;
}
@@ -8902,8 +8905,8 @@ int sandybridge_pcode_read(struct drm_i9
status = gen6_check_mailbox_status(dev_priv);
if (status) {
- DRM_DEBUG_DRIVER("warning: pcode (read) mailbox access failed: %d\n",
- status);
+ DRM_DEBUG_DRIVER("warning: pcode (read from mbox %x) mailbox access failed for %ps: %d\n",
+ mbox, __builtin_return_address(0), status);
return status;
}
@@ -8923,7 +8926,8 @@ int sandybridge_pcode_write(struct drm_i
*/
if (I915_READ_FW(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) {
- DRM_DEBUG_DRIVER("warning: pcode (write) mailbox access failed\n");
+ DRM_DEBUG_DRIVER("warning: pcode (write of 0x%08x to mbox %x) mailbox access failed for %ps\n",
+ val, mbox, __builtin_return_address(0));
return -EAGAIN;
}
@@ -8934,7 +8938,8 @@ int sandybridge_pcode_write(struct drm_i
if (__intel_wait_for_register_fw(dev_priv,
GEN6_PCODE_MAILBOX, GEN6_PCODE_READY, 0,
500, 0, NULL)) {
- DRM_ERROR("timeout waiting for pcode write (%d) to finish\n", mbox);
+ DRM_ERROR("timeout waiting for pcode write of 0x%08x to mbox %x to finish for %ps\n",
+ val, mbox, __builtin_return_address(0));
return -ETIMEDOUT;
}
@@ -8946,8 +8951,8 @@ int sandybridge_pcode_write(struct drm_i
status = gen6_check_mailbox_status(dev_priv);
if (status) {
- DRM_DEBUG_DRIVER("warning: pcode (write) mailbox access failed: %d\n",
- status);
+ DRM_DEBUG_DRIVER("warning: pcode (write of 0x%08x to mbox %x) mailbox access failed for %ps: %d\n",
+ val, mbox, __builtin_return_address(0), status);
return status;
}