-----Original Message----- From: João Paulo Rechi Vita [mailto:jprvita@gmail.com] Sent: Thursday, June 09, 2016 3:14 PM To: Alex Deucher; maruthi.srinivas.b@gmail.com Cc: dri-devel@lists.freedesktop.org; alsa-devel@alsa-project.org; Deucher, Alexander; Bayyavarapu, Maruthi; João Paulo Rechi Vita; linux@endlessm.com Subject: AMD Carrizo HDMI audio
Hello Alex and Maruthi,
I'm trying to get HDMI audio working on a AMD CARRIZO laptop, which I believe need the ACP changes which got merged into Linux 4.6. But testing the v4.6 tag, amd_acp_hw_init() returns -ENODEV, because it succeeds the "if (acp_mode != ACP_MODE_I2S)" test in acp_hw.c. Does this mean this chip does not uses ACP, or is there anything else missing?
Your system does not use ACP. It uses HDA audio. You'll need to use the new DAL display code which is not yet upstream for HDMI or DP audio support. You can find dal support on my freedesktop tree. E.g., https://cgit.freedesktop.org/~agd5f/linux/log/?h=drm-next-4.7-wip-dal
Alex