Patch "drm/i915: Init power domains early in driver load" has been added to the 4.4-stable tree

Patch "drm/i915: Init power domains early in driver load" has been added to the 4.4-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    drm/i915: Init power domains early in driver load

to the 4.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     drm-i915-init-power-domains-early-in-driver-load.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From f5949141a21ee16edf1beaf95cbae7e419171ab5 Mon Sep 17 00:00:00 2001
From: Daniel Vetter <daniel.vetter@ffwll.ch>
Date: Wed, 13 Jan 2016 11:55:28 +0100
Subject: drm/i915: Init power domains early in driver load
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

From: Daniel Vetter <daniel.vetter@ffwll.ch>

commit f5949141a21ee16edf1beaf95cbae7e419171ab5 upstream.

Since

commit ac9b8236551d1177fd07b56aef9b565d1864420d
Author: Ville Syrjälä <ville.syrjala@linux.intel.com>
Date:   Fri Nov 27 18:55:26 2015 +0200

    drm/i915: Introduce a gmbus power domain

gmbus also needs the power domain infrastructure right from the start,
since as soon as we register the i2c controllers someone can use them.

v2: Adjust cleanup paths too (Chris).

v3: Rebase onto -nightly (totally bogus tree I had lying around) and
also move dpio init head (Ville).

v4: Ville instead suggested to move gmbus setup later in the sequence,
since it's only needed by the modeset code.

v5: Move even close to the actual user, right next to the comment that
states where we really need gmbus (and interrupts!).

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Patrik Jakobsson <patrik.jakobsson@linux.intel.com>
Cc: Imre Deak <imre.deak@intel.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Meelis Roos <mroos@linux.ee>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Fixes: ac9b8236551d ("drm/i915: Introduce a gmbus power domain")
References: http://www.spinics.net/lists/intel-gfx/msg83075.html
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1452682528-19437-1-git-send-email-daniel.vetter@ffwll.ch
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/gpu/drm/i915/i915_dma.c      |    6 +++---
 drivers/gpu/drm/i915/intel_display.c |    2 ++
 2 files changed, 5 insertions(+), 3 deletions(-)

--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -402,6 +402,8 @@ static int i915_load_modeset_init(struct
 	if (ret)
 		goto cleanup_gem_stolen;
 
+	intel_setup_gmbus(dev);
+
 	/* Important: The output setup functions called by modeset_init need
 	 * working irqs for e.g. gmbus and dp aux transfers. */
 	intel_modeset_init(dev);
@@ -451,6 +453,7 @@ cleanup_gem:
 cleanup_irq:
 	intel_guc_ucode_fini(dev);
 	drm_irq_uninstall(dev);
+	intel_teardown_gmbus(dev);
 cleanup_gem_stolen:
 	i915_gem_cleanup_stolen(dev);
 cleanup_vga_switcheroo:
@@ -1028,7 +1031,6 @@ int i915_driver_load(struct drm_device *
 
 	/* Try to make sure MCHBAR is enabled before poking at it */
 	intel_setup_mchbar(dev);
-	intel_setup_gmbus(dev);
 	intel_opregion_setup(dev);
 
 	i915_gem_load(dev);
@@ -1099,7 +1101,6 @@ out_gem_unload:
 	if (dev->pdev->msi_enabled)
 		pci_disable_msi(dev->pdev);
 
-	intel_teardown_gmbus(dev);
 	intel_teardown_mchbar(dev);
 	pm_qos_remove_request(&dev_priv->pm_qos);
 	destroy_workqueue(dev_priv->gpu_error.hangcheck_wq);
@@ -1198,7 +1199,6 @@ int i915_driver_unload(struct drm_device
 
 	intel_csr_ucode_fini(dev);
 
-	intel_teardown_gmbus(dev);
 	intel_teardown_mchbar(dev);
 
 	destroy_workqueue(dev_priv->hotplug.dp_wq);
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -15565,6 +15565,8 @@ void intel_modeset_cleanup(struct drm_de
 	mutex_lock(&dev->struct_mutex);
 	intel_cleanup_gt_powersave(dev);
 	mutex_unlock(&dev->struct_mutex);
+
+	intel_teardown_gmbus(dev);
 }
 
 /*


Patches currently in stable-queue which might be from daniel.vetter@ffwll.ch are

queue-4.4/drm-i915-dp-fall-back-to-18-bpp-when-sink-capability-is-unknown.patch
queue-4.4/drm-nouveau-display-enable-vblank-irqs-after-display-engine-is-on-again.patch
queue-4.4/drm-i915-init-power-domains-early-in-driver-load.patch
queue-4.4/drm-gma500-use-correct-unref-in-the-gem-bo-create-function.patch
queue-4.4/drm-i915-shut-up-gen8-sde-irq-dmesg-noise.patch
queue-4.4/drm-i915-skl-don-t-skip-mst-encoders-in-skl_ddi_pll_select.patch
queue-4.4/drm-i915-restore-inhibiting-the-load-of-the-default-context.patch
queue-4.4/drm-i915-intel_hpd_init-fix-suspend-resume-reprobing.patch