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drm/i915: don't clobber the pipe param in sanitize_modesetting

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commit a9dcf84b14 upstream.

... we need it later on in the function to clean up pipe <-> plane
associations. This regression has been introduced in

commit f47166d2b0
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date:   Thu Mar 22 15:00:50 2012 +0000

    drm/i915: Sanitize BIOS debugging bits from PIPECONF

Spotted by staring at debug output of an (as it turns out) totally
unrelated bug.

v2: I've totally failed to do the s/pipe/i/ correctly, spotted by
Chris Wilson.

Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Eugeni Dodonov <eugeni.dodonov@intel.com>
Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Daniel Vetter
2012-05-13 22:29:25 +02:00
committed by Greg Kroah-Hartman
parent aa8878bc13
commit 808cf72ca9
1 changed files with 3 additions and 2 deletions
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5
drivers/gpu/drm/i915/intel_display.c
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@@ -6579,10 +6579,11 @@ static void intel_sanitize_modesetting(struct drm_device *dev,
{
struct drm_i915_private *dev_priv = dev->dev_private;
u32 reg, val;
int i;
/* Clear any frame start delays used for debugging left by the BIOS */
for_each_pipe(pipe) {
reg = PIPECONF(pipe);
for_each_pipe(i) {
reg = PIPECONF(i);
I915_WRITE(reg, I915_READ(reg) & ~PIPECONF_FRAME_START_DELAY_MASK);
}