ALSA: hda - remove controller dependency on i915 power well for Baytrail/Braswell

For Baytrail (Valleyview) and Braswell (Cherryview), only the HDMI codec is
in the display power well while the HD-A controller isn't. So the controller
flag 'need_i915_power' is not set to release the display power after probe,
and the codec flag 'link_power_control" is set to request/release the display
power via bus link_power ops.

Signed-off-by: Mengdong Lin <mengdong.lin@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index 8cd10b8..9253b71 100644 (file)
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -1900,8 +1900,10 @@ static int azx_probe_continue(struct azx *chip)
         * display codec needs the power and it can be released after probe.
         */
        if (chip->driver_caps & AZX_DCAPS_I915_POWERWELL) {
-               /* Assume the controller needs the power by default */
-               hda->need_i915_power = 1;
+               /* Baytral/Braswell controllers don't need this power */
+               if (pci->device != 0x0f04 && pci->device != 0x2284)
+                       hda->need_i915_power = 1;
+
 
 #ifdef CONFIG_SND_HDA_I915
                err = hda_i915_init(hda);

diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c
index 5f44f60..a8016e1 100644 (file)
--- a/sound/pci/hda/patch_hdmi.c
+++ b/sound/pci/hda/patch_hdmi.c
@@ -2335,6 +2335,15 @@ static int patch_generic_hdmi(struct hda_codec *codec)
                intel_haswell_fixup_enable_dp12(codec);
        }
 
+       /* For Valleyview/Cherryview, only the display codec is in the display
+        * power well and can use link_power ops to request/release the power.
+        * For Haswell/Broadwell, the controller is also in the power well and
+        * can cover the codec power request, and so need not set this flag.
+        * For previous platforms, there is no such power well feature.
+        */
+       if (is_valleyview_plus(codec))
+               codec->core.link_power_control = 1;
+
        if (is_haswell_plus(codec) || is_valleyview_plus(codec))
                codec->depop_delay = 0;