linux-kernel - [RFC PATCH 2/2] soundwire: qcom: add support for static port mapping

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Message-Id: <20210120180110.8357-3-srinivas.kandagatla@linaro.org>
Date:   Wed, 20 Jan 2021 18:01:10 +0000
From:   Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
To:     vkoul@...nel.org, yung-chuan.liao@...ux.intel.com
Cc:     pierre-louis.bossart@...ux.intel.com, sanyog.r.kale@...el.com,
        gregkh@...uxfoundation.org, alsa-devel@...a-project.org,
        linux-kernel@...r.kernel.org,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Subject: [RFC PATCH 2/2] soundwire: qcom: add support for static port mapping

On some of Qualcomm SoundWire controller instances ports are statically
mapped based on the functionalities. So add support for such mapping.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
---
 drivers/soundwire/qcom.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/soundwire/qcom.c b/drivers/soundwire/qcom.c
index 6d22df01f354..0641b591037e 100644
--- a/drivers/soundwire/qcom.c
+++ b/drivers/soundwire/qcom.c
@@ -474,7 +474,10 @@ static int qcom_swrm_compute_params(struct sdw_bus *bus)
 
 		list_for_each_entry(s_rt, &m_rt->slave_rt_list, m_rt_node) {
 			list_for_each_entry(p_rt, &s_rt->port_list, port_node) {
-				pcfg = &ctrl->pconfig[i];
+				if (p_rt->is_static_map)
+					pcfg = &ctrl->pconfig[p_rt->mapped_port_num - 1];
+				else
+					pcfg = &ctrl->pconfig[i];
 				p_rt->transport_params.port_num = p_rt->num;
 				p_rt->transport_params.sample_interval =
 					pcfg->si + 1;
@@ -551,7 +554,11 @@ static int qcom_swrm_stream_alloc_ports(struct qcom_swrm_ctrl *ctrl,
 		list_for_each_entry(s_rt, &m_rt->slave_rt_list, m_rt_node) {
 			list_for_each_entry(p_rt, &s_rt->port_list, port_node) {
 				/* Port numbers start from 1 - 14*/
-				pn = find_first_zero_bit(port_mask, maxport);
+				if (p_rt->is_static_map)
+					pn = p_rt->mapped_port_num;
+				else
+					pn = find_first_zero_bit(port_mask, maxport);
+
 				if (pn > (maxport - 1)) {
 					dev_err(ctrl->dev, "All ports busy\n");
 					ret = -EBUSY;
-- 
2.21.0