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([178.197.223.109]) by smtp.gmail.com with ESMTPSA id xo25-20020a170907bb9900b00a0b6541b592sm4433071ejc.88.2023.11.28.07.00.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 28 Nov 2023 07:00:53 -0800 (PST) From: Krzysztof Kozlowski To: Andy Gross , Bjorn Andersson , Konrad Dybcio , Vinod Koul , Bard Liao , Pierre-Louis Bossart , Sanyog Kale , linux-arm-msm@vger.kernel.org, alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org Cc: Krzysztof Kozlowski , Mark Brown Subject: [PATCH] soundwire: qcom: allow multi-link on newer devices Date: Tue, 28 Nov 2023 16:00:49 +0100 Message-Id: <20231128150049.412236-1-krzysztof.kozlowski@linaro.org> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Newer Qualcomm SoCs like X1E80100 might come with four speakers spread over two Soundwire controllers, thus they need a multi-link Soundwire stream runtime. Cc: Mark Brown Cc: alsa-devel@alsa-project.org Signed-off-by: Krzysztof Kozlowski Reviewed-by: Pierre-Louis Bossart --- This is an entirely different approach than my previous try here: https://lore.kernel.org/all/20231025144601.268645-1-krzysztof.kozlowski@lin= aro.org/ --- drivers/soundwire/qcom.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/drivers/soundwire/qcom.c b/drivers/soundwire/qcom.c index 412b8e663a0a..57943724f0eb 100644 --- a/drivers/soundwire/qcom.c +++ b/drivers/soundwire/qcom.c @@ -920,6 +920,18 @@ static int qcom_swrm_init(struct qcom_swrm_ctrl *ctrl) return 0; } =20 +static int qcom_swrm_read_prop(struct sdw_bus *bus) +{ + struct qcom_swrm_ctrl *ctrl =3D to_qcom_sdw(bus); + + if (ctrl->version >=3D SWRM_VERSION_2_0_0) { + bus->multi_link =3D true; + bus->hw_sync_min_links =3D 3; + } + + return 0; +} + static enum sdw_command_response qcom_swrm_xfer_msg(struct sdw_bus *bus, struct sdw_msg *msg) { @@ -1078,6 +1090,7 @@ static const struct sdw_master_port_ops qcom_swrm_por= t_ops =3D { }; =20 static const struct sdw_master_ops qcom_swrm_ops =3D { + .read_prop =3D qcom_swrm_read_prop, .xfer_msg =3D qcom_swrm_xfer_msg, .pre_bank_switch =3D qcom_swrm_pre_bank_switch, .post_bank_switch =3D qcom_swrm_post_bank_switch, @@ -1196,6 +1209,15 @@ static int qcom_swrm_stream_alloc_ports(struct qcom_= swrm_ctrl *ctrl, =20 mutex_lock(&ctrl->port_lock); list_for_each_entry(m_rt, &stream->master_list, stream_node) { + /* + * For streams with multiple masters: + * Allocate ports only for devices connected to this master. + * Such devices will have ports allocated by their own master + * and its qcom_swrm_stream_alloc_ports() call. + */ + if (ctrl->bus.id !=3D m_rt->bus->id) + continue; + if (m_rt->direction =3D=3D SDW_DATA_DIR_RX) { maxport =3D ctrl->num_dout_ports; port_mask =3D &ctrl->dout_port_mask; --=20 2.34.1