This patch series fixes handling of zero value in feature list and provides Remote audio volume control support for HSP profile in both HS and AG roles. Luiz, you wrote that you do not have time to work on this, so I implemented it myself in this patch series. Could you please find time at least for reviewing and merging these patches? Thanks. Pali Rohár (3): src/profile: Distinguish between zero-set HFP AG features and unset HFP AG features src/profile: Export Remote Audio Volume Control SDP value for HSP HS role via first bit in features value src/profile: Add default SDP record for Headset role of HSP 1.2 profile with Erratum 3507 src/profile.c | 112 ++++++++++++++++++++++++++++++++++++++++++++++---- 1 file changed, 104 insertions(+), 8 deletions(-) -- 2.20.1