[Intel-gfx] [PATCH] drm/i915: remove extraneous VGA power domain put calls

[Imre Deak]

In recent dmesg logs reported for unrelated issues I noticed some power
domain WARNs caused by the following.

The workaround

commit ce352550327b394f3072a07c9cd9d27af9276f15
Author: Ville Syrjälä <ville.syrjala at linux.intel.com>
Date:   Fri Sep 20 10:14:23 2013 +0300

    drm/i915: Fix unclaimed register access due to delayed VGA memory disable

and following fixup of it

commit a14853206517b0c8102accbc77401805a0dbdb9e
Author: Ville Syrjälä <ville.syrjala at linux.intel.com>
Date:   Mon Sep 16 17:38:34 2013 +0300

    drm/i915: Move power well init earlier during driver load

was partially reverted by

commit 7f16e5c1416070dc590dd333a2d677700046a4ab
Merge: 9d1cb91 5e01dc7
Author: Daniel Vetter <daniel.vetter at ffwll.ch>
Date:   Mon Nov 4 16:28:47 2013 +0100

    Merge tag 'v3.12' into drm-intel-next

but kept the power domain put calls on the error path.

I think for now we can keep things as-is (not reintroduce the w/a) and just fix
the error path, since
- nobody complained seeing this issue
- according to Ville someone is reworking the VGA arbitration scheme at the
  moment and when that's ready we have to rethink this part anyway

So fix this by just removing the put calls from the error path as well.

Signed-off-by: Imre Deak <imre.deak at intel.com>
---
 drivers/gpu/drm/i915/i915_dma.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index 0b38f88..4a13523 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -1339,7 +1339,7 @@ static int i915_load_modeset_init(struct drm_device *dev)
 
 	ret = i915_gem_init(dev);
 	if (ret)
-		goto cleanup_power;
+		goto cleanup_irq;
 
 	INIT_WORK(&dev_priv->console_resume_work, intel_console_resume);
 
@@ -1348,10 +1348,8 @@ static int i915_load_modeset_init(struct drm_device *dev)
 	/* Always safe in the mode setting case. */
 	/* FIXME: do pre/post-mode set stuff in core KMS code */
 	dev->vblank_disable_allowed = true;
-	if (INTEL_INFO(dev)->num_pipes == 0) {
-		intel_display_power_put(dev_priv, POWER_DOMAIN_VGA);
+	if (INTEL_INFO(dev)->num_pipes == 0)
 		return 0;
-	}
 
 	ret = intel_fbdev_init(dev);
 	if (ret)
@@ -1386,8 +1384,7 @@ cleanup_gem:
 	mutex_unlock(&dev->struct_mutex);
 	WARN_ON(dev_priv->mm.aliasing_ppgtt);
 	drm_mm_takedown(&dev_priv->gtt.base.mm);
-cleanup_power:
-	intel_display_power_put(dev_priv, POWER_DOMAIN_VGA);
+cleanup_irq:
 	drm_irq_uninstall(dev);
 cleanup_gem_stolen:
 	i915_gem_cleanup_stolen(dev);
-- 
1.8.4