[PATCH 4.14 008/183] drm/i915/audio: Fix audio detection issue on GLK

[Greg Kroah-Hartman]

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

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

From: Gaurav K Singh <gaurav.k.singh@xxxxxxxxx>

commit b4615730530be85fc45ab4631c2ad6d8e2d0b97d upstream.

On Geminilake, sometimes audio card is not getting
detected after reboot. This is a spurious issue happening on
Geminilake. HW codec and HD audio controller link was going
out of sync for which there was a fix in i915 driver but
was not getting invoked for GLK. Extending this fix to GLK as well.

Tested by Du,Wenkai on GLK board.

Bspec: 21829

v2: Instead of checking GEN9_BC, BXT and GLK macros, use IS_GEN9 macro (Jani N)

Cc: <stable@xxxxxxxxxxxxxxx> # b651bd2a3ae3 ("drm/i915/audio: Fix audio enumeration issue on BXT")
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Gaurav K Singh <gaurav.k.singh@xxxxxxxxx>
Reviewed-by: Abhay Kumar <abhay.Kumar@xxxxxxxxx>
Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/1523989338-29677-1-git-send-email-gaurav.k.singh@xxxxxxxxx
(cherry picked from commit 8221229046e862977ae93ec9d34aa583fbd10397)
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/gpu/drm/i915/intel_audio.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpu/drm/i915/intel_audio.c
+++ b/drivers/gpu/drm/i915/intel_audio.c
@@ -704,7 +704,7 @@ static void i915_audio_component_codec_w
 	struct drm_i915_private *dev_priv = kdev_to_i915(kdev);
 	u32 tmp;
 
-	if (!IS_GEN9_BC(dev_priv))
+	if (!IS_GEN9(dev_priv))
 		return;
 
 	i915_audio_component_get_power(kdev);