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authorTakashi Iwai <tiwai@suse.de>2018-06-21 14:33:53 +0300
committerTakashi Iwai <tiwai@suse.de>2018-06-21 14:46:56 +0300
commit57cb54e53bddb59f5f542ddd4b0bfe005d31a8d5 (patch)
treeec1faa541bf6d2c619a80be938b3538f6b36c3a4 /sound/firewire
parentf04684b4d85d6371126f476d3268ebf6a0bd57cf (diff)
downloadlinux-57cb54e53bddb59f5f542ddd4b0bfe005d31a8d5.tar.xz
ALSA: hda - Force to link down at runtime suspend on ATI/AMD HDMI
Henning Kühn reported that the discrete AMD GPU on his hybrid graphics laptop no longer runtime-suspends due to the recent commit 07f4f97d7b4b ("vga_switcheroo: Use device link for HDA controller"). The root cause is that the HDMI codec on AMD GPU doesn't support CLKSTOP and EPSS, which are currently mandatory for powering down the HD-audio link at runtime suspend. Because the HD-audio link is still up, HD-audio controller driver blocks the transition to D3. For addressing the regression, this patch adds a new flag to indicate the forced link-down, and sets it for AMD HDMI codecs appropriately in the codec driver. Fixes: 07f4f97d7b4b ("vga_switcheroo: Use device link for HDA controller") Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=106957 Reported-by: Lukas Wunner <lukas@wunner.de> Reported-and-tested-by: Henning Kühn <prg@cooco.de> Cc: <stable@vger.kernel.org> # v4.17+ Signed-off-by: Takashi Iwai <tiwai@suse.de>
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