linux-kernel - [PATCH 4.18 152/197] drm/i915/lpe: Mark LPE audio runtime pm as "no callbacks"

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Date:   Thu, 13 Sep 2018 15:31:41 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Chris Wilson <chris@...is-wilson.co.uk>,
        Takashi Iwai <tiwai@...e.de>,
        Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        Ville Syrjälä 
        <ville.syrjala@...ux.intel.com>,
        Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
        Rodrigo Vivi <rodrigo.vivi@...el.com>
Subject: [PATCH 4.18 152/197] drm/i915/lpe: Mark LPE audio runtime pm as "no callbacks"

4.18-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Chris Wilson <chris@...is-wilson.co.uk>

commit 75eef0f1ed478284911b8723a5bdb659499a7aac upstream.

The LPE audio is a child device of i915, it is powered up and down
alongside the igfx and presents no independent runtime interface. This
aptly fulfils the description of a "No-Callback" Device, so mark it
thus.

Fixes: 183c00350ccd ("drm/i915: Fix runtime PM for LPE audio")
Testcase: igt/pm_rpm/basic-pci-d3-state
Testcase: igt/pm_rpm/basic-rte
Signed-off-by: Chris Wilson <chris@...is-wilson.co.uk>
Cc: Takashi Iwai <tiwai@...e.de>
Cc: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
Cc: Ville Syrjälä <ville.syrjala@...ux.intel.com>
Cc: stable@...r.kernel.org
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180802140416.6062-1-chris@chris-wilson.co.uk
(cherry picked from commit 46e831abe864a6b59fa3de253a681c0f2ee1bf2f)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@...el.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/gpu/drm/i915/intel_lpe_audio.c |    4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

--- a/drivers/gpu/drm/i915/intel_lpe_audio.c
+++ b/drivers/gpu/drm/i915/intel_lpe_audio.c
@@ -127,9 +127,7 @@ lpe_audio_platdev_create(struct drm_i915
 		return platdev;
 	}
 
-	pm_runtime_forbid(&platdev->dev);
-	pm_runtime_set_active(&platdev->dev);
-	pm_runtime_enable(&platdev->dev);
+	pm_runtime_no_callbacks(&platdev->dev);
 
 	return platdev;
 }