linux-kernel - [PATCH 8/8] soundwire: intel_init: save Slave(s) _ADR info in sdw_intel

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Message-Id: <20200227223206.5020-9-pierre-louis.bossart@linux.intel.com>
Date:   Thu, 27 Feb 2020 16:32:06 -0600
From:   Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
To:     alsa-devel@...a-project.org
Cc:     linux-kernel@...r.kernel.org, tiwai@...e.de, broonie@...nel.org,
        vkoul@...nel.org, gregkh@...uxfoundation.org, jank@...ence.com,
        srinivas.kandagatla@...aro.org, slawomir.blauciak@...el.com,
        Bard liao <yung-chuan.liao@...ux.intel.com>,
        Rander Wang <rander.wang@...ux.intel.com>,
        Ranjani Sridharan <ranjani.sridharan@...ux.intel.com>,
        Hui Wang <hui.wang@...onical.com>,
        Guennadi Liakhovetski <guennadi.liakhovetski@...ux.intel.com>,
        Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        Sanyog Kale <sanyog.r.kale@...el.com>
Subject: [PATCH 8/8] soundwire: intel_init: save Slave(s) _ADR info in sdw_intel_ctx

From: Bard Liao <yung-chuan.liao@...ux.intel.com>

Save ACPI information in context so that we can match machine driver
with sdw _ADR matching tables.

Signed-off-by: Guennadi Liakhovetski <guennadi.liakhovetski@...ux.intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@...ux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
---
 drivers/soundwire/intel_init.c | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/drivers/soundwire/intel_init.c b/drivers/soundwire/intel_init.c
index 91ec91127f2a..60d6d844ee4a 100644
--- a/drivers/soundwire/intel_init.c
+++ b/drivers/soundwire/intel_init.c
@@ -74,6 +74,8 @@ static int sdw_intel_cleanup(struct sdw_intel_ctx *ctx)
 
 	kfree(ctx->links);
 	ctx->links = NULL;
+	kfree(ctx->ids);
+	ctx->ids = NULL;
 
 	return 0;
 }
@@ -188,7 +190,11 @@ static struct sdw_intel_ctx
 	struct acpi_device *adev;
 	struct sdw_master_device *md;
 	unsigned long time;
+	struct sdw_slave *slave;
+	struct list_head *node;
+	struct sdw_bus *bus;
 	u32 link_mask;
+	int num_slaves = 0;
 	int count;
 	int i;
 
@@ -261,6 +267,25 @@ static struct sdw_intel_ctx
 		link->md = md;
 
 		list_add_tail(&link->list, &ctx->link_list);
+		bus = &link->cdns->bus;
+		/* Calculate number of slaves */
+		list_for_each(node, &bus->slaves)
+			num_slaves++;
+	}
+
+	ctx->ids = kcalloc(num_slaves, sizeof(*ctx->ids), GFP_KERNEL);
+	if (!ctx->ids)
+		goto err;
+
+	ctx->num_slaves = num_slaves;
+	i = 0;
+	list_for_each_entry(link, &ctx->link_list, list) {
+		bus = &link->cdns->bus;
+		list_for_each_entry(slave, &bus->slaves, node) {
+			ctx->ids[i].id = slave->id;
+			ctx->ids[i].link_id = bus->link_id;
+			i++;
+		}
 	}
 
 	return ctx;
-- 
2.20.1