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drm/i915: Show the DPCD read error inline

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When reporting the DPCD dump through debugfs, show the errors inline
where appropriate. If a read at one particular offset fails, report it.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=106371
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181010081706.29931-1-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2018-10-10 09:17:06 +01:00
parent 1e712535c5
commit 65404c89e9
1 changed files with 4 additions and 7 deletions
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11
drivers/gpu/drm/i915/i915_debugfs.c
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@ -4915,13 +4915,10 @@ static int i915_dpcd_show(struct seq_file *m, void *data)
continue;
err = drm_dp_dpcd_read(&intel_dp->aux, b->offset, buf, size);
if (err <= 0) {
DRM_ERROR("dpcd read (%zu bytes at %u) failed (%zd)\n",
size, b->offset, err);
continue;
}
seq_printf(m, "%04x: %*ph\n", b->offset, (int) size, buf);
if (err < 0)
seq_printf(m, "%04x: ERROR %d\n", b->offset, (int)err);
else
seq_printf(m, "%04x: %*ph\n", b->offset, (int)err, buf);
}
return 0;