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drm/i915: don't read cursor registers on powered down pipes

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At i915_display_info, don't call cursor_position() for a disabled
CRTC, since the CRTC may be on a powered down pipe, and this will
cause "Unclaimed register before interrupt" error messages.

Testcase: igt/pm_pc8/debugfs-read
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Paulo Zanoni 2014-04-01 14:55:11 -03:00 committed by Daniel Vetter
parent b0e5ddf323
commit a23dc6584f
1 changed files with 7 additions and 6 deletions
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3
drivers/gpu/drm/i915/i915_debugfs.c
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@ -2334,7 +2334,7 @@ static int i915_display_info(struct seq_file *m, void *unused)
seq_printf(m, "CRTC %d: pipe: %c, active: %s\n",
crtc->base.base.id, pipe_name(crtc->pipe),
yesno(crtc->active));
if (crtc->active)
if (crtc->active) {
intel_crtc_info(m, crtc);
active = cursor_position(dev, crtc->pipe, &x, &y);
@ -2343,6 +2343,7 @@ static int i915_display_info(struct seq_file *m, void *unused)
x, y, crtc->cursor_addr,
yesno(active));
}
}
seq_printf(m, "\n");
seq_printf(m, "Connector info\n");